BHD51 Series

Explosion-proof Junction Boxes

Overview

Explosion protection compliant with CENELEC, IEC, and NEC standards
Suitable for hazardous areas:
- Zone 1 and Zone 2
- Zone 21 and Zone 22
- Class I, Zone 1 and Zone 2
- Class I, Division 1, Groups A, B, C, D
Available in six enclosure types: A, B, C, D, E, F
- Types A, B, C, D, E: Copper-free aluminium alloy construction
- Type F: Available in copper-free aluminium alloy or cast iron
Designed for reliable cable connection and distribution in hazardous environments
Rated current up to 20A
Durable enclosure with high mechanical strength and corrosion resistance
Certified to IECEx, ATEX, and CU TR standards

Specifications

Explosion Protection

IECEx (Global): IECEx CQM 11.0022X
- Ex db IIC T6 Gb
- Ex tb IIIC T80°C Db
ATEX (Europe): CNEX 21 ATEX 0001X
- II 2 G Ex db IIC T6 Gb
- II 2 D Ex tb IIIC T80°C Db

Standards & Certifications

IECEx, ATEX, CU TR
EN 60079-0 / -1 / -31
IEC 60079-0 / -1 / -31

Construction & Materials

Enclosure: Copper-free aluminium alloy or cast iron, powder-coated (RAL1021)
Fasteners: Stainless steel

Electrical Data

Rated Current: ≤20A
Rated Voltage:
- Max. 690V AC 50/60Hz
- Max. 500V DC

Terminal Data

Number of Terminals:
- 6 terminals (Types A–E)
- 4 terminals (Type F)
Conductor Size: 0.2–2.5 mm²

Protection & Environment

Ingress Protection: IP66
Ambient Temperature: -60°C to +60°C
Earthing: M5 (internal & external earth bolts)

Installation

Cable Entry: Standard M20 × 1.5 plug
Optional: NPT plug available on request
Cable Gland (optional): DQM-II (Ex d) or DQM-III (Ex d)

Application

Types A–E: Suitable for wiring or branching applications
Type F: Used as mounting accessory for pendant pole or ceiling-type light fittings

Data Sheet