01
Flexible Accessory Options
Compatible with AX, AL, SHT, and UVT accessories for enhanced monitoring and control functions.
BK Series UL Type
The BK63HU UL 489 and BK63H UL 1077 Miniature Circuit Breakers (MCB) provide overload and short-circuit protection for North American power distribution and industrial control applications. Designed for compact DIN-rail mounting, the products support safe and efficient circuit protection for commercial buildings, OEM equipment, and control panel systems. With interrupting capacity up to 10 kA and UL-certified performance, the BK63HU and BK63H offer flexible protection for a range of electrical installations.
- Interrupting Capacity
- Up to 10 kA
- Rated Current
- 1 – 63 A
- Rated Voltage
- Up to 480Y/277 V AC, Up to 125 V DC
Key Features
02
Enhanced Terminal Safety
A transparent protective cover prevents accidental contact during installation and maintenance.
03
Handle Locking Support
Supports handle locking to improve maintenance safety and operational security.
04
Several Industrial Applications
Suitable for OEM equipment, industrial control panels, and commercial distribution systems.
Lineup
Specification |  BK63HU |  BK63H |
|---|---|---|
Standard | UL 489 | UL 1077 |
Rated Current | 1 – 63 A | 1 – 63 A |
Rated Short Circuit Capacity (AC) | 1P : 10 kA@120/240 VAC, 10 kA@277 VAC (1 - 25 A) 10 kA@120/240 VAC (30 - 63 A) 2P, 3P : 10 kA@240 VAC, 480Y/277 VAC (1 - 25 A) 10 kA@240 VAC (30 - 63 A) | 1P : 10 kA@120/240 VAC 6 kA@277 VAC 2P - 4P : 10 kA@120/240 VAC 6 kA@480Y/277 VAC |
Rated Short Circuit Capacity (DC) | 1P : 10 kA@60 VDC | 1P : 10 kA@60 VDC 2P - 4P : 10 kA@125 VDC |
Tripping Curve | B, C, D, K | B, C, D |
Pole | 1P, 2P, 3P | 1P, 2P, 3P, 4P |
Downloads
[MCB] BK63H,BK63HU for Americas
- [MCB]_BK63HBK63HU_for Americas_EN_C015E2-06-202605.pdf (3.42MB)
[UL MCB ACCESSORY]_SHT-H_UVT-H_UL1077_Instruction Manual_EN_202506
- [UL MCB ACCESSORY]_SHT-H_UVT-H_UL1077_Instruction Manual_EN_202506.pdf (839.86KB)
[UL MCB]_BK63H_UL1077_Instruction Manual_EN_202601
- [UL_MCB]_BK63H_UL1077_Manual_EN_202601.pdf (657.21KB)
LA63Hs, LA-ALs, LA-AXs, LA-SHTs, LA-U/OVTs
- E302147-Vol3-Sec1-20250527_Certificate of Compliance.pdf
alarm switch type AL-HU, auxiliary switch type AX-HU, shunt trip device type SHT-HU, and undervoltage trip device type UVT-HU intended for installation in Type BK63HU circuit breakers
- E223241-Vol2-Sec5.pdf
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Safeguard essential public services with robust electrical architectures. We deliver highly reliable power control and automation for government facilities, aviation hubs, water treatment plants
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Drive manufacturing excellence and minimize production downtime. Our precision automation and power systems are optimized for automotive lines, semiconductor fabrication, heavy machinery
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Protect critical building systems and enhance overall energy efficiency. Delivering safe, compliant, and scalable power solutions for high-rise commercial spaces, logistics hubs, retail complexes
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