Siemens JD22B300 Molded Case Circuit Breaker
- 300A
- 2 Pole
- Bolt-On
Quantity
Siemens JD22B300 - 300A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial applications, the Siemens JD22B300 is a 300A, 2-pole molded case circuit breaker from the Sentron JD2 frame series. It provides reliable overcurrent protection for demanding electrical systems. This bolt-on MCCB installs into Siemens Sentron panelboards, switchboards, and motor control centers. It serves as a direct replacement for older JD62B300 and JXD62B300 breakers. Rated for 65kAIC at 240VAC, it features fixed thermal and adjustable magnetic trip settings.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD22B300-R |
| Series | JD2 |
| Amperage | 300A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 3/0 AWG - 500 kcmil (Cu), (2) 4/0 AWG - 500 kcmil (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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat wire sizes do the standard load lugs on the JD22B300 accept?
The standard load side lugs accommodate two 3/0 AWG to 500 kcmil copper or aluminum conductors per phase. Ensure proper torque specifications are followed during installation.
How is the trip unit configured on this J-frame breaker?
It utilizes an interchangeable thermal-magnetic trip unit. The thermal protection (long-time) is fixed, while the magnetic protection (instantaneous) is adjustable to coordinate with downstream loads.
What types of panels accept the JD22B300 circuit breaker?
This bolt-on breaker is designed for installation in Siemens Sentron panelboards, switchboards, and motor control centers. It can also be mounted in compatible standalone enclosures.
Is the Siemens JD22B300 a direct replacement for older I-T-E models?
Yes. Siemens acquired I-T-E, and this unit directly replaces older I-T-E or Gould circuit breakers that share the JD22B300 catalog number.
What safety precautions are required when installing this bolt-on breaker?
Always verify that the panelboard or switchboard is completely de-energized before attempting to bolt the breaker to the busbars. Installation must be performed by a licensed electrician in accordance with local electrical codes.
Can the JD22B300 be utilized in direct current systems?
Yes, this breaker carries a DC rating of 250VDC with a 30kA interrupting capacity, allowing it to be used in compatible direct current applications.
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