Siemens / ITE JKL3B350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE JKL3B350 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding industrial environments, the JKL3B350 is a 3-pole, 350A molded case circuit breaker from Siemens. It features thermal-magnetic trip technology with adjustable magnetic settings for reliable protection. This bolt-on MCCB mounts into legacy Siemens and ITE P4, P5, S5, and CDP-6 panelboards. It serves as an exact-fit replacement, with the JXD63B350 available as a modern substitute.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | JKL3B350-R |
| Series | JKL |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | JKL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / ITE P4, P5, S5, CDP-6 Panelboards |
| Wire Gauge | 1/0 AWG - 500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Interchangeable Trip |
Product FAQs
5 answersWhich panelboards are compatible with the JKL3B350 breaker?
This bolt-on circuit breaker is designed for use in Siemens and ITE P4, P5, S5, and CDP-6 panelboards.
What wire sizes are supported by the terminals on the JKL3B350?
The standard lugs accept copper or aluminum conductors ranging from 1/0 AWG to 500 kcmil. Verify local codes for proper conductor sizing based on the 350A rating.
How does the trip unit operate on this J-Frame breaker?
It utilizes a thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings. This provides standard long-time and instantaneous (LI) overcurrent protection.
What is the interrupting capacity of this breaker at different voltages?
The JKL3B350 is rated for 65kA at 240VAC, 35kA at 480VAC, and 25kA at 600VAC. It also carries a 10kA rating for 250VDC applications.
Is the JKL3B350 a current production model?
This is a legacy J-Frame molded case circuit breaker originally manufactured by ITE and Siemens. It is primarily used as a direct replacement in existing electrical systems.
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