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Siemens JD23B300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Siemens
JD23B300
Molded Case Circuit Breaker
Brand
Siemens
SKU
JD23B300
Quantity
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Siemens JD23B300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Built to handle demanding loads, this 300A Siemens MCCB delivers reliable performance for industrial facilities. It is specifically designed to integrate with standard commercial power distribution networks. The breaker utilizes a secure bolt-on mounting style, fitting perfectly into Sentron series enclosures and panelboards. For facility managers upgrading older systems, this JD2 frame unit is replaced by the JD63B300. It offers a high interrupting capacity of 65kA at 240VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD23B300 |
| Series | JD2 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| 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, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens JD23B300 circuit breaker?
This bolt-on MCCB is designed to mount into Siemens Sentron series panelboards, including P4 and P5 models, as well as compatible Siemens switchboards and motor control centers.
What is the adjustable magnetic trip range for the JD23B300?
The JD23B300 features a fixed thermal and adjustable magnetic trip unit. The instantaneous magnetic trip can be adjusted between 1250A and 2500A to coordinate with your specific load requirements.
Which lug kits are recommended for terminating conductors on the JD23B300?
For aluminum or copper wire, use the TA2J6500 aluminum lug kit, which accepts two 4/0 AWG to 500 kcmil aluminum or 3/0 AWG to 500 kcmil copper conductors per phase. For copper-only applications, use the TC2J6500 copper lug kit.
Is there a 600V equivalent or direct upgrade for the JD23B300?
Yes, the Siemens JD63B300 shares the same JD frame dimensions and 300A rating but offers a 600VAC rating, making it a suitable upgrade or replacement when the 240V-rated JD23B300 is unavailable.
Does the JD23B300 breaker carry a HACR rating?
Yes, this breaker is HACR rated, meaning it is certified for safe use with heating, air conditioning, and refrigeration equipment branch circuits.
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