Siemens / ITE JL2B150 Molded Case Circuit Breaker
- 150A
- 2 Pole
- Bolt-On
Quantity
Siemens / ITE JL2B150 - 150A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Operating as a critical safety component, the JL2B150 is a 2-pole, 150A molded case circuit breaker by Siemens. It incorporates an interchangeable thermal-magnetic trip unit to safeguard commercial networks against overloads. The unit mounts into Siemens P4, P5, and older ITE FC/S-Series panelboards. It is ideal for maintaining existing systems, though the JD62B150 is available as a modern replacement. Delivering a 65kAIC rating at 240V, it features common trip functionality and includes lugs.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | JL2B150-R |
| Series | JL |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | JL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Legacy ITE FC/S-Series Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, Trip-Free Mechanism, Quick-Make/Quick-Break, Common Trip |
Product FAQs
7 answersWhat panelboards are compatible with the JL2B150 breaker?
This breaker is designed for use in Siemens P4 and P5 panelboards, Siemens switchboards, and legacy ITE FC or S-Series panelboards.
What does the LI trip function indicate on this J-frame breaker?
The LI designation means the breaker provides Long-Time and Instantaneous protection. It uses a thermal-magnetic mechanism where the thermal overload is fixed and the instantaneous magnetic short-circuit trip is adjustable.
Is the trip unit on the JL2B150 permanent or interchangeable?
This breaker features an interchangeable trip unit. This allows panel builders to swap the trip unit to a different amperage rating in the future without replacing the entire breaker frame.
What type of wire can be used with the standard lugs on this breaker?
The standard terminals accept both copper and aluminum conductors ranging from 4 AWG to 350 kcmil. Ensure proper torque specifications are followed during installation.
How does a bolt-on breaker like the JL2B150 connect to the bus bar?
Bolt-on breakers secure directly to the panelboard bus bars using screws or bolts. This provides a highly secure, vibration-resistant connection commonly required in commercial and industrial applications.
Does the JL2B150 include ground fault equipment protection?
No. This is a standard thermal-magnetic molded case circuit breaker. It provides standard overload and short-circuit protection but does not include integrated ground fault or arc fault sensing.
Can this 2-pole breaker be installed in a 3-phase panelboard?
Yes. A 2-pole breaker can be mounted in a 3-phase panelboard to supply a single-phase load by connecting to two of the three available phases.
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