ABB / General ElectricTHKMA836500
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ABB / General Electric THKMA836400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
ABB / General Electric
THKMA836400
Molded Case Circuit Breaker
Brand
ABB / General Electric
SKU
THKMA836400
Quantity
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ABB / General Electric THKMA836400 - 400A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial power distribution, this 400A molded case circuit breaker belongs to GE's K-Frame series. It mounts into GE A-Series panelboards, switchboards, and motor control centers. As a legacy component, it is commonly replaced by the SKHA36AT0400 or Tmax XT5 using a retrofit kit. Delivering a 35kA interrupting capacity at 480VAC, the breaker utilizes an interchangeable thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings for precise protection.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THKMA836400 |
| Series | THKMA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 40kA @ 250VDC, 22kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | GE Switchboards, Motor Control Centers, GE A-Series Panelboards |
| Wire Gauge | (1) 4 AWG - 600 kcmil (Cu/Al) |
| Max Wire | 600 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Load Lugs (TCAL41) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, Interchangeable Trip Unit |
Product FAQs
6 answersWhich panelboards and enclosures are compatible with the THKMA836400 breaker?
This K-frame breaker is designed for bolt-on installation in GE switchboards, motor control centers, and GE A-Series panelboards.
What wire sizes are accepted by the lugs on this 400A breaker?
The factory lugs accept one 4 AWG to 600 kcmil wire per phase. They are rated for use with both copper and aluminum conductors.
How does the adjustable magnetic trip unit operate on the THKMA836400?
This breaker features a fixed thermal element for standard overload protection and an adjustable magnetic element. The adjustable magnetic setting allows electricians to tune the instantaneous short-circuit trip threshold to match specific system requirements.
Is the THKMA836400 suitable for direct current applications?
Yes, this breaker is rated for DC systems. It provides up to 40kA interrupting capacity at 250VDC and 22kA at 500VDC.
Will this breaker arrive with ABB or General Electric branding?
Because ABB acquired GE Industrial Solutions, this legacy K-frame breaker may feature either ABB or General Electric branding depending on when it was manufactured. Both are exact functional equivalents.
What protection does the LI trip function provide?
The LI designation means the breaker provides Long-Time and Instantaneous protection. Long-Time protects against gradual overloads, while the Instantaneous function immediately clears severe short circuits to protect downstream equipment.
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