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ABB / General Electric TLB434300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
ABB / General Electric
TLB434300
Molded Case Circuit Breaker
Brand
ABB / General Electric
SKU
TLB434300
Quantity
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ABB / General Electric TLB434300 - 300A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy commercial and industrial motor control, this 300A thermal-magnetic breaker ensures precise overcurrent protection. The device utilizes fixed thermal and magnetic trip settings to safeguard critical infrastructure against unexpected electrical faults. Designed as a unit mount solution, it installs easily into standard GE switchboards and motor control centers.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | TLB434300-R |
| Series | TLB |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC |
| Frame Type | TLB |
|---|---|
| Terminal Type | Lugs |
| For Use With | GE Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 600 kcmil (Cu/Al) or (2) 1/0 AWG - 250 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, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Integrally Fused, Current Limiting, Non-Interchangeable Trip, HACR Rated |
Product FAQs
5 answersIs the GE TLB434300 still manufactured, or is there a direct replacement?
The TLB434300 is part of the legacy GE Tri-Break series. Following ABB's acquisition of GE Industrial Solutions, this TB frame breaker is typically replaced by the ABB Tmax XT5 series, which requires a specific retrofit kit for installation into existing GE switchboards or motor control centers.
What wire sizes are accepted by the lugs on the TLB434300?
The standard feed-thru lugs on this breaker accept either a single conductor from 4 AWG to 600 kcmil (Cu/Al) or dual conductors from 1/0 AWG to 250 kcmil (Cu/Al) per phase.
What types of enclosures or equipment is the TLB434300 designed for?
This unit-mount molded case circuit breaker is designed for installation in compatible GE switchboards and industrial motor control centers (MCCs) that accommodate the TB frame footprint.
Does the TLB434300 feature adjustable trip settings?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous (LI) protection without user-adjustable dials for the trip curve.
Is the TLB434300 a current-limiting circuit breaker?
Yes, the GE Tri-Break series features an integrally fused, current-limiting design that helps minimize potential fault damage to downstream equipment during a short circuit event.
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