Siemens JD22B400 Molded Case Circuit Breaker
- 400A
- 2 Pole
- Bolt-On
Quantity
Siemens JD22B400 - 400A 2 Pole Molded Case Circuit Breaker
Re-Certified
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Description
A robust solution for commercial facilities, the Siemens JD22B400 is a 400A, 2-pole molded case circuit breaker. Part of the Sentron JD2 frame family, it ensures reliable overcurrent protection for electrical networks. This bolt-on breaker installs into Siemens Sentron panelboards, switchboards, and enclosures. It is also an exact replacement for discontinued JD62B400 and JXD62B400 models. Featuring an interchangeable thermal-magnetic trip unit, it provides a 65kAIC rating at 240VAC.Specifications
| Brand | Siemens |
|---|---|
| Series | JD2 |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 3/0 AWG - 500 kcmil (Cu/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, UL 489, IEC 60947-2, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
10 answersWhat panelboards and enclosures are compatible with the JD22B400?
This breaker is designed for use in Siemens Sentron panelboards, switchboards, motor control centers, and individual enclosures that accept JD frame circuit breakers.
Can this breaker be used in DC applications?
Yes, the JD22B400 is rated for 250VDC with an interrupting capacity of 30kA. In 250VDC systems, it is typically wired with one pole on each leg of the supply circuit.
What are the standard lugs used on the JD22B400?
The standard lug kit for this 400A JD frame breaker is the TA2J6500. It features a 2-barrel aluminum body design suitable for both line and load side terminations.
What wire sizes are accepted by the standard TA2J6500 lugs?
The standard lugs accept two conductors per phase, accommodating 3/0 AWG to 500 kcmil copper or aluminum wire.
Does the JD22B400 mount onto a DIN rail?
No, this is a traditional bolt-on molded case circuit breaker. It is designed to be bolted directly to the busbars in compatible Sentron panelboards, switchboards, and motor control centers.
What does the LI trip function code mean for this breaker?
LI stands for Long-Time and Instantaneous trip functions. The Long-Time function provides thermal overload protection, while the Instantaneous function provides magnetic short-circuit protection.
How does the adjustable magnetic trip work on the JD22B400?
While the thermal overload rating is fixed at 400A, the magnetic trip is adjustable. This allows electricians to tune the instantaneous trip threshold to handle specific inrush currents, preventing nuisance tripping during equipment startup.
Are ITE JD22B400 and Siemens JD22B400 the same breaker?
Yes. Siemens acquired ITE, and the JD22B400 is manufactured under the Siemens Sentron line. An ITE branded JD22B400 is functionally identical to a Siemens branded JD22B400.
Can I use this to replace an older ITE JD22B400?
Yes, the current Siemens JD22B400 is a direct drop-in replacement for legacy ITE JD22B400 breakers, sharing the same physical dimensions, bolt-on mounting, and JD frame specifications.
Why is it important to properly torque the bolt-on connections?
Improperly torqued bolt-on connections can lead to high resistance, localized overheating, and potential arc faults. Always use a calibrated torque wrench and follow the manufacturer specifications printed on the breaker label during installation.
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