Terminal Block CDGKZ Certifications: UL, CE, RoHS & IEC Explained
Industrial control panels and DIN-rail assemblies demand terminal blocks that meet strict safety and performance standards. CDGKZ terminal blocks are positioned as UL-listed, IEC-certified, and CE-approved devices, ensuring they comply with global requirements. This article covers the major certifications and directives — UL 1059, IEC 60947-7-1, EU directives like RoHS and Low Voltage Directive (LVD), plus material tests like UL94 V-0 and IEC glow-wire — that define industrial terminal block safety in 2025. We explain why UL and IEC listings, CE marking, and RoHS/REACH compliance are essential for dependable, certified terminals.
TL;DR:
UL 1059 and UL94: Terminal blocks must meet UL safety standards (up to 1500 V, flame-resistant UL94 V-0) for North American panels.
IEC 60947-7-1: International standard for DIN-rail terminal blocks (screw/spring-clamp for up to 1000 VAC).
CE Mark and LVD: CE marking confirms compliance with EU Low Voltage, EMC and Machinery directives; mandatory for selling in Europe.
RoHS/REACH: Restricts hazardous substances (Pb, Hg, Cd, Cr⁶⁺, PBDE/PBB, DEHP, etc.) in electrical equipment, so certified terminal blocks are RoHS/REACH compliant.
Safety Tests: Flame-retardance (UL94 V0) and glow-wire (IEC60695) tests verify terminal block insulation will not sustain fires.
UL Certification for Industrial Terminal Blocks
Underwriters Laboratories (UL) sets key safety benchmarks for terminal blocks in North America. The UL 1059 standard covers wiring terminals rated up to 1500 V, ensuring they provide safe, insulated connections. A UL-listed terminal block permanently supports and insulates wire terminations and joints to prevent fire or shock. Industrial terminal blocks often use flame-retardant plastic housings rated UL 94 V-0, meaning the material self-extinguishes rapidly after a flame is removed. High-current and protective-earth terminal blocks are also tested under UL1059. For example, CDGKZ’s UL-certified industrial connectors meet the UL1059 requirements for voltage, current, and insulation, making them suitable for control panels and machinery in UL-regulated markets.
| Standard | Applicable Region | Key Requirements / Notes |
|---|---|---|
| UL 1059 | North America (UL / cUL) |
• Safety requirements for terminal blocks in industrial control equipment • Covers dielectric strength, creepage distances, flammability (UL94 V-0) • Mandatory for industrial panels in U.S. and Canada |
| IEC 60947-7-1 (2025 Update) | EU / Worldwide (IEC / EN) |
• Requirements for screw/spring terminal blocks in LV switchgear • Updated 2025 version: improved mechanical endurance and thermal test criteria • Required for CE conformity & international acceptance |
| CE / LVD Marking | European Union |
• Requires compliance with EN 60947 series + LVD directives • Includes electrical safety, insulation, temperature rise • Requires Declaration of Conformity (DoC) and technical file |
| RoHS / REACH | Global (Environmental Compliance) |
• Restricts hazardous substances: Pb, Hg, Cd, Cr6+, PBB, PBDE, etc. • Requires material declaration and supply-chain traceability • Mandatory for EU and widely adopted globally |
| CSA C22.2 | Canada |
• Canadian equivalent to UL standards • Required for electrical equipment sold in Canada |
| Additional Certifications | Special Applications |
• For high-current rail-mounted busbar terminal blocks • May require short-circuit testing, heat-rise testing, or IP protection ratings |
| *This table summarizes global compliance requirements for industrial terminal blocks, including 2025 IEC updates. | ||
Key Takeaways:
UL 1059 covers industrial wiring terminal blocks (≤1500 V) for secure, insulated conductor connections.
Flame-retardant plastics with UL94 V-0 rating are required; they extinguish quickly with no burning drips.
Protective-earth (ground) terminal blocks and high-current connectors undergo UL tests to ensure safety.
Learn more: Industrial DIN-rail terminal block specifications and UL listings.
IEC Standards for Terminal Blocks
The International Electrotechnical Commission (IEC) defines worldwide standards for terminal blocks. IEC 60947-7-1:2025 (superseding the 2009 edition) specifies requirements for low-voltage terminal blocks with screw or spring clamps. It applies to copper conductors (0.2–300 mm²) in circuits up to 1000 VAC (1500 VDC). The standard mandates tests for mechanical strength, electrical insulation, creepage/clearance, and voltage/current withstand. Compliance means the terminal block is IEC-certified, suitable for industrial and machinery use. CDGKZ terminal blocks that meet IEC 60947 are recognized as IEC-certified products, assuring engineers that the connectors have passed international controlgear tests. By following IEC standards, manufacturers ensure their terminal blocks are compatible with global industrial requirements.
Key Takeaways:
IEC 60947-7-1 applies to industrial DIN-rail terminal blocks (screw/spring type, up to 1000 VAC/1500 VDC).
It requires stringent testing: insulation, creepage/clearance, short-circuit and thermal performance.
IEC-certified terminal blocks (like CDGKZ’s) carry this mark, easing international compliance.
Learn more: Global terminal block standards and IEC certification guide.
CE Marking and European Compliance
CE marking on a terminal block signifies conformity with EU directives. In practice, industrial terminal blocks must meet the Low Voltage Directive (2014/35/EU) and often the Machinery Directive. Importantly, under EU RoHS rules, a CE mark is mandatory to indicate compliance. This means a CE-marked block has been evaluated to meet European EN/IEC safety standards (e.g. EN 60947 series) and has a Declaration of Conformity. For customers, CE approval implies the terminal block meets EU requirements for voltage rating, dielectric strength, and environmental directives. CDGKZ’s CE-certified terminal blocks guarantee that they can be legally installed in European panels and machinery under the essential requirements of EU law.
Key Takeaways:
CE marking indicates the terminal block complies with EU directives (LVD, EMC, Machinery, RoHS).
It requires meeting EN/IEC standards and providing technical documentation (Declaration of Conformity).
Emphasizing CE approval shows CDGKZ blocks are accepted in European industrial markets.
Learn more: Details on CE marking and Low Voltage Directive requirements.
RoHS and Environmental Regulations
Environmental safety directives are critical for all electronic components. The EU RoHS Directive (2011/65/EU, amended by 2015/863/EU) bans ten hazardous substances — lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and certain phthalates. All terminal blocks with any electronic parts must comply. RoHS compliance requires lead-free alloys and flame retardants without restricted brominated compounds. In addition, REACH regulations restrict chemicals in the EU market. CDGKZ terminal blocks are RoHS/REACH compliant: they use approved materials and clearly label compliance. This is important for industrial customers who need to certify their assemblies are environmentally safe. For example, a RoHS-compliant CDGKZ terminal block ensures the entire control panel meets EU substance rules
Key Takeaways:
EU RoHS restricts toxic substances in electrical components (e.g. Pb, Cd, Hg, Cr6+, PBB, PBDE, DEHP, etc.).
CDGKZ terminal blocks use RoHS-compliant materials and are labeled accordingly.
Showing RoHS/REACH compliance lets manufacturers market their end-products under EU environmental laws.
Learn more: Terminal block materials and hazardous substance regulations.
Material Safety: Flame-Retardance and Testing
Terminal block safety also depends on material properties. Housings typically require a UL94 V-0 plastic rating: a vertical flame on the material must self-extinguish in under 10 seconds with no flaming drips. Polyamide PA 6.6 or polycarbonate are common V-0 plastics for terminal blocks. Another key test is the IEC 60695-2-11 glow-wire test, which simulates internal fault heating. In this test, a heated wire (up to +850 °C) is pressed onto the block’s enclosure; the block passes if no sustained flame or ignition of surrounding paper occursphoenixcontact.com. Many certified blocks (including CDGKZ’s) meet glow-wire +960 °C criteria, ensuring the plastic won’t propagate fire under overload conditions. These material tests complement UL/IEC certifications by verifying the block’s fire safety in real-world conditions.
Key Takeaways:
UL94 V-0 rating ensures terminal block plastic self-extinguishes (no afterburn).
IEC 60695 glow-wire testing (up to 850 °C or higher) ensures plastic housings won’t ignite under fault heat.
Certified terminal blocks use flame-retardant, halogen-free materials for best fire safety.
Learn more: Fire safety testing standards for electrical connectors.
Global Certification Requirements and Trends (2025)
Certification needs vary by region but are increasingly harmonized. North America primarily uses UL listings (UL 1059) and standards like CSA for connectors, while Europe follows EN/IEC standards under CE. Asia and other markets often accept IEC or local approvals. Notably, IEC 60947-7-1 was updated in 2025, and RoHS/REACH rules tighten every few years. High-current or specialty blocks (e.g. rail-mounted busbar blocks) may require additional certifications. OEMs should verify that their terminal blocks carry global marks (UL, cUL, CE, IEC, etc.) for multi-market use. In practice, CDGKZ’s range is designed to meet these global codes: UL 1059, IEC 60947, CE/LVD, and RoHS for 2025 compliance, simplifying end-product certification across North America, EU, and beyond.
| Region | Primary Certification Standards | Notes / Requirement Level |
|---|---|---|
| North America (UL / CSA) | UL 1059, UL 486, CSA C22.2 | Highest requirement intensity. Mandatory safety listings for industrial panels. |
| European Union (CE / LVD) | EN / IEC 60947-7-1, EN 60947-7-2, CE/LVD | Strict conformity with harmonized EU standards. Requires DoC + CE marking. |
| Worldwide (IEC) | IEC 60947 series (updated 2025), IEC 60204-1 | Internationally recognized baseline for terminal block safety and performance. |
| Global Environmental | RoHS, RoHS 3, REACH | Environmental compliance mandatory for global trade; moderate technical requirement. |
| *This table summarizes major certification frameworks required for industrial terminal blocks (2025 update). | ||
Key Takeaways:
Global terminal block standards cover voltage ratings (UL/IEC), insulation and creepage (IEC/EN), and material safety (UL94, RoHS).
CDGKZ certifications (UL, IEC, CE, RoHS) align with 2025 requirements for North America, Europe, and worldwide.
System integrators look for terminal blocks with the correct approvals to meet local panel-building codes and international specs.
Learn more: Comprehensive guide to industrial connector certifications (global compliance 2025).
FAQ
In summary, CDGKZ terminal blocks should be showcased as UL-listed, IEC-certified, CE-marked, and RoHS/REACH compliant devices. These certifications (UL 1059, IEC 60947-7-1, CE/LVD, UL94 V-0 flame rating, IEC 60695 glow-wire, etc.) ensure safety and acceptance in industrial control panels worldwide. Emphasizing these credentials assures engineers that the product meets all key electrical and environmental standards.
Conclusion & CTA
Choose terminal blocks with full safety and environmental approvals for reliable industrial applications. CDGKZ’s range of UL-listed, CE-approved, RoHS-compliant terminal blocks provides certified, high-performance connections. Contact us today to learn more about our certified industrial connectors or request a quote!
