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Siemens LXD63B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Siemens
LXD63B400
Molded Case Circuit Breaker
Brand
Siemens
SKU
LXD63B400
Quantity
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Siemens LXD63B400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
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Siemens LXD63B400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LXD63B400 |
| Series | LXD6 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| 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, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Siemens LXD63B400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LXD63B400-R |
| Series | LXD6 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| 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, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Built for demanding environments, the Siemens LXD63B400 is a 400A, three-pole molded case circuit breaker. It delivers reliable protection with adjustable magnetic trip settings. This unit-mount breaker integrates into Siemens Sentron panelboards and switchboards. Lugs are not included and must be sourced separately. Delivering 35 kAIC at 480VAC, this LD frame device is HACR rated and supports reverse-feed applications. The non-interchangeable trip ensures consistent performance.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LXD63B400 |
| Series | LXD6 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers |
| 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, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhat equipment is compatible with the LXD63B400 breaker?
This LD frame breaker is designed for installation in Siemens Sentron panelboards, switchboards, and motor control centers.
Are lug terminals included with the LXD63B400?
No, this breaker is supplied without lugs. For cable connections, a compatible lug kit like the TA2J6500 must be purchased and installed separately. The TA2J6500 accepts 3/0 AWG to 500 kcmil copper or 4/0 AWG to 500 kcmil aluminum wire.
Is the trip unit on the LXD63B400 adjustable?
Yes, while the thermal (long-time) protection is fixed, the magnetic (instantaneous) trip setting is adjustable. This allows panel builders to fine-tune the breaker for specific inrush currents and coordination requirements.
How is the LXD63B400 installed in an enclosure?
It features a unit-mount configuration, meaning it bolts directly to the chassis or mounting pan of the panelboard or switchboard rather than plugging into a busbar.
Can the LXD63B400 replace older ITE LD frame breakers?
Yes, this Siemens Sentron LD frame breaker is backward compatible and can serve as a direct replacement for legacy ITE LD and LXD frame breakers of the same amperage and pole configuration.
Is the LXD63B400 suitable for reverse-feed applications?
Yes, this breaker is UL listed for reverse-feed applications, allowing it to be back-fed in compatible panelboards and switchboards.
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