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Siemens JL3B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Siemens
JL3B225
Molded Case Circuit Breaker
Brand
Siemens
SKU
JL3B225
Quantity
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Siemens JL3B225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Operating at up to 600VAC, this 225-amp molded case breaker delivers consistent long-time and instantaneous fault defense. It mounts into standard Siemens P4 or P5 panelboards and serves as a reliable component for motor control centers. The thermal-magnetic design includes an interchangeable trip unit and carries an HACR rating for heating and cooling applications. For newer installations, the JD63B225 serves as the modern substitute for this classic J-Frame model.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JL3B225-R |
| Series | JL |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 30kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Motor Control Centers, Legacy ITE FC-1 Panelboards |
| Wire Gauge | 3/0 AWG - 500 kcmil |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
5 answersWhich panelboards are compatible with the JL3B225 circuit breaker?
This bolt-on breaker is designed for use in Siemens P4 and P5 panelboards, switchboards, and motor control centers. It is also backward compatible with legacy ITE FC-1 panelboards.
Is the Siemens JL3B225 the same as the ITE JL3B225?
Yes. Siemens acquired ITE and continued manufacturing these J-frame breakers. An ITE-branded JL3B225 and a Siemens-branded JL3B225 are the exact same component and are fully interchangeable.
What wire sizes are accepted by the lugs on this 225A J-frame breaker?
The standard lugs on the JL3B225 accept wire gauges ranging from 3/0 AWG to 500 kcmil. Always verify the specific torque requirements printed on the breaker faceplate before finalizing terminations.
How does the adjustable trip unit on the JL3B225 operate?
It utilizes a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection. The adjustable magnetic dial allows electricians to fine-tune the instantaneous trip point for proper system coordination.
Can the JL3B225 be installed in standard residential load centers?
No. This is an industrial J-frame molded case circuit breaker designed for heavy-duty commercial panelboards, switchboards, and motor control centers. It will not fit in standard residential plug-on or bolt-on load centers.
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