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Siemens HJXD63B400L Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Siemens
HJXD63B400L
Molded Case Circuit Breaker
Brand
Siemens
SKU
HJXD63B400L
Quantity
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Siemens HJXD63B400L - 400A 3 Pole Molded Case Circuit Breaker
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Description
Engineered by Siemens, the HJXD63B400L serves as a 3-pole, 400A molded case circuit breaker for industrial distribution. Belonging to the Sentron JD frame family, it provides reliable overcurrent protection. This unit-mount breaker installs into Siemens Sentron panelboards, including P4, P5, S4, S5, and SPP types, as well as compatible switchboards. Delivering high interrupting capacity, it is rated 100kAIC at 240V and 65kAIC at 480V. It features a thermal-magnetic trip and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HJXD63B400L |
| Series | HJXD6 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 35kA @ 500VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (Type P4, P5, S4, S5, SPP), Switchboards, Enclosures |
| Wire Gauge | (2) 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs (TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
8 answersWhich Siemens panelboards are compatible with the HJXD63B400L breaker?
This JD frame breaker is designed for use in Siemens Sentron Type P4, P5, S4, S5, and SPP panelboards, as well as compatible switchboards and standalone enclosures.
Does the HJXD63B400L come with lugs, and what wire sizes are accepted?
Yes, this breaker includes factory-installed lugs. The terminals accept two wires per phase, accommodating conductor sizes from 3/0 AWG up to 500 kcmil.
Is the trip unit on the HJXD63B400L fully adjustable?
No, this thermal-magnetic breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
What frame size is the Siemens HJXD63B400L?
This breaker belongs to the Siemens Sentron JD frame family. It shares the same physical footprint as other JD, JXD, and HJD frame breakers, making it a direct replacement for older models in this frame class.
What does the H prefix mean in the HJXD63B400L part number?
The H prefix designates this as a high-interrupting capacity breaker. It provides a 65kAIC rating at 480VAC, which is higher than the standard JXD version.
How is the HJXD63B400L mounted in an electrical system?
This is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the mounting pan or enclosure backplate rather than plugging into a busbar.
Can the HJXD63B400L be used in DC applications?
Yes, this breaker is rated for use in direct current systems up to 500VDC, where it provides an interrupting capacity of 35kA.
Can this breaker be locked out for maintenance?
Yes, handle blocking devices and padlocking accessories can be added to the JD frame to secure the breaker in the OFF position for safe maintenance and lockout-tagout procedures.
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