Terminal Block Cross-Reference Guide – OEM Alternatives to Leading Global Brands

Introduction: Switching to an OEM terminal block alternative can solve frustrating issues like high prices, long lead times, and frequent stockouts from major brands. This guide addresses the real pain point: finding a terminal block replacement that is a DIN rail terminal block equivalent to Phoenix Contact, Weidmüller, WAGO, ABB, or Siemens models. We’ll show how you can get identical structure, size, and electrical performance – all fully certified – by using CDGKZ DIN rail terminal blocks as drop-in substitutes. The goal is to help distributors, panel builders, and engineers cross-reference leading brands to cost-effective OEM options without sacrificing quality or compliance.

TL;DR – Key Points

• Drop-In Compatibility: OEM terminal block alternatives can match the dimensions, mounting style (35mm DIN rail), and connection method of popular brand models, ensuring a true plug-and-play replacement in your control panels.
• Equivalent Electrical Ratings: Quality OEM blocks meet or exceed the same current and voltage ratings as the originals. For safety, choose replacements rated for equal or higher amperage and voltage (e.g. 1000 V, 24–57 A similar to Phoenix Contact UT series). This guarantees no loss in performance or risk of overheating.
• Certified to UL/IEC Standards: Reputable manufacturers (like CDGKZ) produce UL and IEC certified terminal blocks that comply with UL 1059 and IEC 60947-7-1 standards. These OEM parts maintain creepage/clearance distances and flame resistance (UL94 V-0), so using them won’t compromise safety or code compliance.
• Cost & Supply Advantages: OEM equivalents typically cost 30–50% less and are readily available in bulk. You get the same quality and functionality as top brands at a lower price point, with flexible OEM/ODM customization and more stable lead times (solving long delivery issues).
• Screw vs. Spring Options: Leading brands offer screw clamp and spring (push-in) terminal series – and so do OEM suppliers. You can source screw terminal block alternatives for traditional needs or spring clamp replacements for faster wiring. Both types are available as OEM terminal block equivalents, allowing you to select the style that fits your project.

Phoenix Contact Terminal Block Alternatives (UK, UT, PT Series)

Phoenix Contact’s terminal blocks (e.g. UK, UT, PT series) set a high standard for industrial connectivity. They feature modular designs that snap onto DIN rails, with options like screw-clamp terminals (UT/UK series) and push-in spring terminals (PT series). Key specs of Phoenix’s UT 4 feed-through block, for example, include a nominal 1000 V rating and 32 A current capacity with a screw connection. Any OEM replacement must mirror these electrical specifications and physical form. The good news is that CDGKZ’s ST series (screw clamp) and PT series (push-in) terminal blocks are engineered to be 100% compatible equivalents to Phoenix Contact’s offerings. They match the housing size and profile, meaning they mount on the same DIN rail and align perfectly in mixed assemblies. They also accept the same wire gauges and offer identical two-point connections per block (for feed-through types).

One important compatibility factor is the connection method. Phoenix UT and UK series use time-proven screw clamp technology, while the PT series uses tool-free push-in springs. CDGKZ provides OEM alternatives in both formats – for instance, a push-in terminal block equivalent to Phoenix PT 2.5 has the same direct-insert spring mechanism and is rated 800 V, 24 A, just like the original. Similarly, our screw-type blocks utilize a copper alloy rising cage clamp (a design pioneered by Phoenix) to achieve the same secure tightening as Phoenix UT/UK terminals. The result is that installers can mix our OEM blocks with Phoenix blocks in the same terminal strip without noticing a difference in look or feel. Even accessories such as end plates, separators, and marking labels are cross-compatible. By switching to these alternatives, you maintain the exact form, fit, and function of the Phoenix Contact parts – but at a significantly lower cost and with more flexible supply.

Key Takeaways:
– Phoenix Contact alternatives from CDGKZ replicate the design and size of UK/UT/PT series blocks, ensuring they snap onto 35 mm DIN rails and interlock just like the originals.
– The OEM versions carry equal or higher voltage and current ratings (e.g. 24–32 A, 800–1000 V) so you don’t compromise on electrical performance. They use high-quality insulating materials (UL94 V-0 polyamide) and metal components for reliability.
– Connection methods match: screw-clamp replacements require the same torque and provide the same wire securement, while push-in replacements deliver identical tool-free wiring convenience. This allows a seamless switch with no retraining needed for your technicians.

Learn more about how to choose the right DIN rail terminal block for your needs.

Weidmüller Terminal Block Equivalents (W-Series, Z-Series)

Weidmüller’s W-Series (e.g. WDU 2.5, WDU 4) and Z-Series terminal blocks are known for their robust screw connections and comprehensive range of accessories. These modular blocks often share a common profile across models – for instance, a WDU 2.5 feed-through block is about 5 mm wide, fits 30–12 AWG wires, and uses either pluggable (ZQV) or screw-in (WQV) cross-connect jumpers. Any equivalent OEM product must therefore match the profile and pitch so that bridging combs and markers remain compatible. CDGKZ’s ST series screw terminal blocks are designed as one-to-one Weidmüller replacements. They have identical housing dimensions and channel spacing, which means you can reuse your existing Weidmüller accessories (bridges, end clamps, markers) with the CDGKZ blocks. In fact, one third-party manufacturer (ASI) highlighted that true equivalents address issues like color and accessory differences – by molding housings in the same color and maintaining the same mounting geometry, customers could even mix and match parts without visual or functional discrepancies. Our OEM blocks similarly use UL94 V-0 flame-retardant plastic in the signature beige/gray color so your panels keep a uniform look.

Beyond physical fit, the electrical and mechanical specs align as well. Weidmüller’s screw clamp design uses a hardened steel clamping yoke, whereas our design utilizes a nickel-plated copper alloy clamping body for improved corrosion resistance. This provides equal (or better) conductivity and long-term reliability. The wire size range and torque requirements are matched to the W-Series specs, so installers can follow the same procedures when tightening screws. Weidmüller terminals cover conductor sizes from tiny 0.05 mm² up to large 300 mm² in the W-Series, and an OEM supplier like CDGKZ can provide equivalent models across that entire spectrum as well. Each replacement unit is UL Recognized and IEC compliant, so despite being from an alternate source, they meet the same regulatory approvals required in your projects. In short, you can drop in our screw-terminal blocks in place of Weidmüller’s, and they will perform indistinguishably – including accepting standard bridging plugs and achieving the same tightening forces to secure conductors.

Key Takeaways:
– CDGKZ screw-type terminals are dimensionally and functionally equivalent to Weidmüller W-Series, allowing use of the same bridging strips and markers. Housings are even color-matched (e.g. beige/gray) for a seamless visual match.
– Electrical specs and materials are equal or improved: e.g. high-strength nickel-plated copper alloy clamps and corrosion-protected screws deliver the same clamping force with added durability. The OEM blocks handle the same wire gauges and load currents as the originals.
– Using these equivalents requires no change in panel design or assembly process. They mount on the DIN rail and tighten with the same torque. Plus, they carry UL and IEC certifications, so compliance and safety are maintained even when swapping out the brand.

Explore our Terminal Block Solutions archive for more cross-reference insights and tips.

WAGO Terminal Block Replacements (TopJob S 2002 & 2004 Series)

WAGO’s TopJob S series (e.g. 2002, 2004 series) introduced the industry to high-performance spring clamp terminal blocks. These connectors are prized for their push-in CAGE CLAMP® technology that enables tool-free wiring and exceptional vibration resistance. For example, a typical WAGO 2002 two-conductor terminal block handles about 20 A and 600 V, accommodating 12–22 AWG wires in a compact 5.2 mm width. An OEM push-in terminal block equivalent must deliver the same convenience and reliability. CDGKZ’s PT series push-in terminals are designed as WAGO replacements, featuring an advanced spring clamping mechanism that grips wires with constant tension. These alternatives allow you to simply push stripped solid or ferruled conductors in to make the connection – identical to the WAGO workflow. The spring is made of high-grade spring steel, providing a secure contact that resists loosening, even under heavy vibration or shock. In fact, just like WAGO blocks, our push-in terminals excel in high-vibration environments (railway, machinery, etc.) where screw connections might shake loose over time. No periodic re-tightening is needed, which reduces maintenance.

A critical aspect is that electrical ratings and safety features align with WAGO’s. Our push-in blocks are UL 1059 recognized and rated for the same voltage and current levels (e.g. 600 V AC/DC and 20–24 A depending on wire size, similar to WAGO’s specs). They support an equivalent wire size range, clamping everything from small signal wires up to 10 AWG (on larger models) just as WAGO does. Another benefit of these OEM replacements is that they are fully compatible with WAGO’s marking and bridging system. For instance, TopJob S uses orange push-in jumpers; CDGKZ’s design accepts those standard jumper bars, enabling easy commoning of terminals. The housing profile and pitch are matched so you can intermix them on the same DIN rail strip if needed. By choosing a WAGO alternative, you retain the huge advantage of faster installation times – studies show spring terminals can cut wiring time by 30–50% – while also cutting costs. Many control panel builders see significant labor and material savings by switching to these push-in OEM blocks, all without compromising on performance or UL/IEC compliance.

Key Takeaways:
– Push-in OEM blocks offer the same tool-free, quick wiring as WAGO’s spring terminals. Just insert the wire; the clamp locks it in place. This yields equally fast assembly and eliminates screw tightening work.
– The replacements exhibit high vibration resistance and zero-maintenance operation, mirroring WAGO’s renowned reliability. No loosening of connections, thanks to constant spring pressure, even in harsh conditions.
– Specifications and compatibility are one-to-one: same voltage/current ratings (e.g. 600 V, 20 A), same wire size range, and the blocks fit WAGO’s jumpers and marking strips. You gain cost efficiency while keeping your panel design and functionality unchanged.

See our guide on terminal block installation and wiring best practices to ensure secure connections.

ABB SNK Series Alternatives (Screw & PI-Spring Types)

ABB’s SNK series (Entrelec) terminal blocks are popular in industrial projects for their versatility and global certifications. The SNK line is unique in offering two connection technologies in one family – traditional screw clamp and the newer PI-Spring (push-in + spring) terminals. Both types share the same accessories and profile, simplifying design. An effective OEM alternative to the ABB SNK must therefore provide interchangeable screw and push-in versions that mirror ABB’s. CDGKZ meets this need by supplying both screw-type equivalents (mechanically similar to ABB’s ZK screw terminals) and push-in equivalents (matching the SNK PI-Spring functionality). For example, our push-in series features the same “insert and spring” design that allows easy conductor insertion with or without ferrules – just like ABB’s PI-Spring, which advertises ferrule-less connection and no need to retighten screws. Likewise, our screw-type blocks have the same pitch and form as ABB’s, ensuring common bridging combs and end stops can be used across both OEM and ABB blocks.

Compliance with international standards is a major concern when replacing components in critical installations. ABB’s SNK terminals carry a litany of approvals (UL, CSA, IECEx, ATEX, CE) making them suitable worldwide. CDGKZ’s OEM terminal blocks are tested to the same IEC 60947 and UL 1059 requirements, and can be provided with UL Recognized Component markings and CE declarations. This means using our equivalent parts will not jeopardize your project’s certification or require extra paperwork – they are UL-certified terminal blocks manufactured under the same quality systems. Additionally, ABB highlights features like high short-circuit current ratings and operating temperature range in the SNK series. Our alternatives match these critical specs; for instance, they use high-grade copper alloy conductors and screws to achieve comparable SCCR (short-circuit ratings) and can operate in the wide temperature range demanded by industrial standards (often -40 to 105 °C).

From a practicality standpoint, OEM SNK replacements are truly drop-in. The blocks mount on standard DIN rails and have the same footprint and spacing as ABB’s units. Control cabinet builders can mix our blocks into existing ABB SNK terminal strips without any layout changes. Even the marking tags and test plugs fit interchangeably. The benefit is a smooth transition to a more cost-effective supply, without retraining or retooling. You continue to build panels the same way – the difference shows up only in your bill of materials cost and the fact that you won’t be facing long lead times or stock shortages.

Key Takeaways:
– Our OEM equivalents cover both SNK connection styles – screw clamp and push-in spring – with designs that use the same accessories and mounting dimensions as ABB’s terminals. This ensures consistency and mix-and-match capability within your terminal assemblies.
– The replacements are fully certified (UL, IEC, CE, RoHS) to meet global standards. They adhere to UL 1059 and IEC 60947-7-1 specifications for industrial terminal blocks, giving you confidence in safety and code compliance on UL panels or IEC-marked machinery.
– Seamless integration: Physically and electrically, these alternatives plug into ABB SNK applications with no modifications. They offer equal clamp strength, surge ratings, and temperature tolerance, all while typically reducing component cost and mitigating supply chain risks.

Learn more about the international certifications and standards our terminal blocks adhere to.

Siemens 8WH Series OEM Equivalents (Screw & Spring)

Siemens’ 8WH series terminal blocks (part of the SENTRON portfolio) are designed for easy integration into control cabinets and power distribution systems. The 8WH family includes screw-type terminals (8WH1 series) and spring-loaded terminals (8WH2 series) to suit different wiring preferences. They are known for a modular, building-block design with extensive accessories (bridges, test adapters, labeling systems) to streamline panel assembly. When seeking an OEM replacement for Siemens 8WH terminals, the critical considerations are mechanical compatibility and system integration. CDGKZ offers Siemens-equivalent terminal blocks that match the 8WH’s form factor and snap-on features. They have the same width (e.g. ~6 mm for a 2.5 mm² feed-through block) and profile, which allows use of standard Siemens or universal DIN rail bridges. For instance, a Siemens 8WH2 spring clamp terminal rated at ~800 V and 40 A can be substituted with a CDGKZ push-in block of the same rating – it will align in height and depth so that any wiring duct covers, labeling markers, or end brackets continue to fit perfectly.

A key benefit of our OEM approach is modularity: we can supply not only basic feed-through terminals but also multi-level terminals, ground (PE) terminals with the same foot design, fuse holders, and disconnect blocks that are equivalent to those in Siemens’ range. This ensures that an entire terminal assembly (terminal strip) can be replicated with OEM parts, maintaining the overall functionality of the Siemens system. Electrically, the OEM blocks are on par: they typically support up to 800–1000 V and 20–40 A depending on size, in line with Siemens ratings. They also accommodate the same wire sizes (for example, 8WH2 spring clamps handle 28–10 AWG, which our push-in equivalents do as well). From a safety standpoint, our products meet the same IEC and UL standards required for low-voltage switchgear components, meaning they provide proper insulation, spacing, and heat resistance in a cabinet environment. Another aspect of integration is documentation and software – many engineers use Siemens CAE tools that include the 8WH parts. Since our equivalents have matching dimensions and terminal functions, you can continue to use those design tools (by specifying the original part for layout, if needed) and then install the OEM components physically, knowing they will fit the design exactly.

Key Takeaways:
– CDGKZ’s OEM terminal blocks are dimensionally identical to Siemens 8WH series, enabling a painless swap. They clip onto DIN rails and interface with standard bridging and labeling accessories just like the originals, preserving the modular assembly concept.
– The OEM equivalents cover various terminal types (single-level, double-level, ground, fuse, etc.) comparable to Siemens’ offerings, so a complete system substitution is possible without performance gaps.
– High-voltage, high-current capabilities are maintained – e.g. our spring terminal rated for 800 V, 40 A can directly replace an 8WH2 unit. All replacements are built and tested to the same safety standards (UL/IEC), ensuring compatibility not just physically but also in terms of electrical code compliance.

Find further guidance on selecting the right terminal block solution for your project’s requirements.