Hager MCCB 25A 3 Pole 18kA HDA025U

Hager HDA025U: 25A 3 Pole Moulded Case Circuit Breaker (MCCB) with adjustable thermal and fixed magnetic trip, rated to 18kA breaking capacity.

Reliable Overload & Short-Circuit Protection

The adjustable thermal element lets you fine-tune overload protection between 0.63 to 1 times the rated current, so the breaker matches the actual load rather than tripping on guesswork. A fixed magnetic trip backs this up for fast disconnection on short-circuit faults, with a short-circuit release adjustment range up to 600A and a breaking capacity of 18kA at 400V, 50Hz. That combination gives installers confidence on distribution circuits where nuisance tripping and fault clearance both matter.

Secure Access & Tamper Prevention

A lockable cover keeps the thermal and magnetic settings protected once commissioned, preventing accidental or unauthorised adjustment on site. The integrated padlocking handle (Ø4mm) supports safe isolation during maintenance, and the mechanical test button stays accessible through the cover so routine functional checks don't mean opening the enclosure.

Straightforward Installation & Compliance

Cage terminals with screw connection accept up to 95mm² rigid or 70mm² flexible cable, giving installers flexibility on conductor size without compromising termination quality. The unit conforms to BS EN 60947-2 and carries an IP40 degree of protection, and is manufactured by Hager Ltd (Hager Limited) to consistent quality standards. If you're comparing options against Schneider moulded case circuit breakers for a distribution board upgrade, this Hager h3 x160 unit offers equivalent adjustable protection with the added benefit of a lockable, tamper-resistant cover.

Part of a Wider Protection Range

This MCCB pairs well within a broader Hager protection scheme. Where circuits need additional fire risk mitigation, a Hager AFDD (Arc Fault Detection Device) can be fitted upstream to detect dangerous arcing faults that standard MCCBs and MCCBs alone won't catch, giving a more complete protection strategy for the installation.

Key Features of the Hager Moulded Case Circuit Breaker HDA025U Include:

• Adjustable Thermal Trip (0.63 – 0.8 – 1 x In) For Precise Overload Protection
• Fixed Magnetic Trip For Fast Short-Circuit Disconnection
• 18kA Rated Short-Circuit Breaking Capacity At 400V, 50Hz
• Lockable Cover Protects MCCB Settings From Tampering
• Integrated Padlocking Handle (Ø4mm) For Safe Isolation
• Mechanical Test Button Accessible From The Cover
• Cage Terminals With Screw Connection For Secure Termination
• Connection Capacity: 95mm² Rigid / 70mm² Flexible Cables
• Rated Permanent Current (Iu): 25A
• Number Of Poles: 3
• Rated Voltage: 220V
• Overload Release Current Setting: 16A
• Short-Circuit Release Adjustment Range: Up To 600A
• Degree Of Protection: IP40
• Conforms To BS EN 60947-2

If you need some help, would like to take advantage of our Price Promise or have a large order to place, give our team of professionals a call on 0203 994 5470, drop us an email at sales@electricpoint.com or use our Contact Form.