BHD51 Series Explosion proof Junction box ATEX & IECEx Certified for zone1,2 zone 21,22

Description
Documents

ATEX

Ex II 2G Ex db IIC T6 Gb

Ex II 2D Ex tb IIIC T80°C Db

IECEx

Ex db IIC T6 Gb;

Ex tb IIIC T80°C Db

Feature

● Quick Wire Connector

● For Zone 1,2 and Zone 21,22

● Flameproof type, the strongest

BHD51 EX junction box Datasheet_EN

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Product details

Application

Oil and gas, marine, Chemical, pharmaceutical, semiconductor,

mining,military industry, paint booth,power plant ETC hazardous area.

Technical Specifications

Standards：60079-0, 60079-1,60079-31

Permit voltage: 800V Max

Permit currentc: 32A Max

Allowable Temperature： -60°C – +60°C

Protection grade：IP67/IK10

Corrosion-proof：C4 (ISO 12944)

Terminal：1.5~4mm2

Cable entries：(Standard) 4*M25×1.5 plug,Suitable for M25×1.5 gland, for Φ9~Φ16mm cable

(Optional) 4*M20×1.5 plug,Suitable for M20×1.5 gland, for Φ7~Φ12mm cable

HS code：8536909000

Country of origin：China

BHD51 Series Explosion proof Junction box ATEX & IECEx Certified for zone1,2 zone 21,22 FAQS

What is an explosion proof junction box and where is it used?

An explosion proof junction box is a flameproof wiring enclosure that contains any internal explosion and prevents it from reaching the surrounding hazardous atmosphere. It is used to join and distribute electrical circuits in Zone 1 and Zone 2 gas areas and Zone 21/22 dust areas — refineries, offshore platforms, chemical plants and grain handling facilities.
What is the difference between Ex db and Ex e junction boxes?

Ex db (flameproof) enclosures are built to contain an internal explosion, while Ex e (increased safety) enclosures only prevent sparks and hot surfaces by design. That is why the Ex db BHD51 is certified for Zone 1, whereas most Ex e junction boxes are limited to Zone 2 — choosing Ex db removes the risk of under-specifying the box for your area.
Which hazardous area zones is the BHD51 explosion proof junction box certified for?

The BHD51 is certified for Zone 1 and Zone 2 gas atmospheres and Zone 21 and Zone 22 dust atmospheres. Its ATEX marking is Ex II 2G Ex db IIC T6 Gb (gas) and Ex II 2D Ex tb IIIC T80°C Db (dust), with the identical IECEx certification — so one junction box covers both gas and dust hazards without derating.
What voltage and current can the BHD51 explosion proof junction box handle?

The BHD51 accepts up to 800V and 32A, which covers both lighting circuits and small power circuits in hazardous areas. That makes it suitable as a main wiring hub for explosion proof lighting systems — not just a pass-through box for a single luminaire.
What temperature range does the BHD51 junction box support?

The BHD51 operates from -60°C to +60°C, a range that covers arctic offshore projects, high-latitude installations and desert plants at the same time. Most competing junction boxes only certify -20°C or -40°C, so this is a deciding spec for cold-climate and extreme-climate projects.
What cable entries does the BHD51 have?

The BHD51 comes standard with 4 × M25×1.5 plugged entries, suitable for Φ9–16 mm cable; 4 × M20×1.5 entries are available as an option, suitable for Φ7–12 mm cable. Terminal capacity is 1.5–4 mm².
What is the IP rating of the BHD51 explosion proof junction box?

The BHD51 is rated IP67 and IK10, with C4 (ISO 12944) anti-corrosion coating. IP67 means the enclosure is completely dust-tight and sealed against storm-driven rain and high-pressure wash-down, while IK10 is the highest impact rating — 20 joules — which matters when junction boxes are mounted at ground level on rigs and jetties.
Why does the BHD51 use quick wire connectors instead of screw terminals?

Because in a hazardous area junction box the terminal is the most common failure point during the installation stage. The BHD51's quick wire connector shortens on-site wiring time — wiring is fast and simple to install.
Is the BHD51 certified for both ATEX and IECEx?

Yes. The BHD51 holds dual ATEX and IECEx certificates with identical markings — Ex db IIC T6 Gb and Ex tb IIIC T80°C Db — so the same junction box can be shipped to European ATEX projects and IECEx markets such as the Middle East and Asia-Pacific without redesign.
Where are SEEKINGLED explosion proof junction boxes manufactured?

SEEKINGLED explosion proof junction boxes are designed and manufactured in Shenzhen, China, in an ISO 9001 certified factory that holds ATEX QAN quality assurance notification, which means every BHD51 unit is produced under audited explosion-proof quality control — not traded or re-branded.
What is the delivery time for the BHD51 explosion proof junction box?

The delivery time for the BHD51 is about 2 weeks from order confirmation.
What is the MOQ for the BHD51 junction box?

Our standard MOQ for the BHD51 junction box is 30 pieces, and sample orders are welcome during the early stage of cooperation.
Do you offer door-to-door delivery for explosion proof lights shipped from China?

Yes, we can provide door-to-door shipping. If you don't have experience importing from China, we will work with a reliable logistics company to deliver the goods directly to your warehouse.
Can I become a distributor of SEEKINGLED explosion proof lighting in my country?

If your company is in the oil and gas equipment industry, we would be happy to cooperate with you. SEEKINGLED would be very pleased to become your partner. Please feel free to contact us at sales02@seekingled.com — we would be honored to learn more about your business model and discuss potential cooperation.