ABB / General ElectricTHLC234225
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ABB / General Electric THLC436250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
ABB / General Electric
THLC436250
Molded Case Circuit Breaker
Brand
ABB / General Electric
SKU
THLC436250
Quantity
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ABB / General Electric THLC436250 - 250A 3 Pole Molded Case Circuit Breaker
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Description
Part of GE's THLC series, this 250A current-limiting MCCB provides robust protection for industrial applications. By restricting let-through energy during a fault, it actively safeguards sensitive downstream equipment. The bolt-on breaker integrates into compatible GE switchboards and motor control centers. It features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. Rated 200kAIC at 480V, this 3-pole breaker ensures high-capacity interruption.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THLC436250 |
| Series | THLC |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 50kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | GE Switchboards, Motor Control Centers |
| Wire Gauge | 3/0 AWG - 500 kcmil (Cu/Al) or (2) 3/0 AWG - 250 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits, Alarm Switch |
|---|---|
| Accessories | Optional Load Side Lugs (TCLK43) |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip, Common Trip, Trip-Free Mechanism |
| Special Features | Current Limiting |
Product FAQs
8 answersWhat frame size is the THLC436250 built on?
This breaker is built on the GE THLC4 frame, which is a 400-ampere frame size. The 250A trip unit is housed within this larger 400A footprint.
What wire sizes do the standard lugs on the THLC436250 accept?
The factory lugs accommodate either one 3/0 AWG to 500 kcmil wire or two 3/0 AWG to 250 kcmil wires per phase. They are rated for both copper and aluminum conductors.
What is the catalog number for replacement lugs on this breaker?
If you need to replace the line or load lugs, the correct 3-pole lug kit for the THLC4 frame is catalog number TCLK43.
Is the trip unit on the THLC436250 adjustable?
No, this breaker features a non-interchangeable, fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous (LI) protection without adjustable dials.
How does the current-limiting feature of the THLC436250 protect my system?
During a severe short circuit, this current-limiting breaker clears the fault in a fraction of a cycle. This drastically reduces the peak let-through current and energy, minimizing thermal and mechanical stress on downstream equipment.
Can I field-install internal accessories in the THLC436250?
Yes, the THLC4 frame is UL listed for the field installation of internal accessories like shunt trips and auxiliary switches. When routing the control wires, ensure the leads exit from the side of the breaker to maintain the UL listing.
What types of enclosures or panels is this breaker designed for?
The THLC436250 is a bolt-on molded case circuit breaker primarily designed for integration into compatible GE industrial switchboards and motor control centers.
Are line and load lugs included with the THLC436250?
Yes, this complete circuit breaker is supplied from the factory with both line and load lugs already installed.
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