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Siemens LXD63B450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Unit Mount
Siemens
LXD63B450
Molded Case Circuit Breaker
Brand
Siemens
SKU
LXD63B450
Quantity
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Siemens LXD63B450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens LXD63B450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LXD63B450 |
| Series | LXD6 |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LXD |
|---|---|
| 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, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens LXD63B450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LXD63B450 |
| Series | LXD6 |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LXD |
|---|---|
| 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, HACR, 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
Engineered for commercial and industrial applications, the Siemens LXD63B450 is a 3-pole, 450A molded case circuit breaker from the Sentron family. It installs into Siemens panelboards, switchboards, and motor control centers, delivering robust power distribution and equipment protection. Rated for 35 kAIC at 480VAC, this LD frame unit features a non-interchangeable thermal-magnetic trip unit with adjustable magnetic settings. It is reverse feed rated and HACR certified for versatile use.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LXD63B450 |
| Series | LXD6 |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LXD |
|---|---|
| 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, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
10 answersWhat type of panels accept the Siemens LXD63B450?
It is designed for bolt-on installation within Siemens Sentron panelboards, switchboards, and motor control centers that accommodate the standard LD frame footprint.
What is the magnetic trip adjustment range for this 450A breaker?
The LXD63B450 includes a fixed thermal and adjustable magnetic trip unit, with the instantaneous magnetic trip dial typically adjustable between 2000A and 4000A.
Can the thermal-magnetic trip unit be swapped out in the field?
No. The LXD63B450 features a standard factory-assembled, non-interchangeable trip unit.
Is this circuit breaker compatible with legacy ITE installations?
Yes. The Siemens LXD63B450 serves as a direct replacement for older ITE LXD63B450 breakers, maintaining the exact same physical dimensions and bolt-on mounting configuration.
Is the LXD63B450 rated for use in direct current systems?
Yes. In addition to its standard AC ratings, this 3-pole breaker is rated for 500VDC applications with a maximum interrupting capacity of 25kAIC.
Is the LXD63B450 suitable for reverse feed applications?
Yes, this Siemens LD frame breaker is UL listed for reverse fed operations, offering installation flexibility in various distribution configurations.
What are the physical dimensions of the LXD63B450 LD frame breaker?
The standard dimensions for this 3-pole circuit breaker are approximately 7.5 inches wide, 11.0 inches high, and 4.0 inches deep.
Does this 450A circuit breaker carry an HACR rating?
Yes, the Siemens LXD63B450 is HACR certified, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.
What is the continuous operating temperature rating for this Sentron breaker?
The thermal elements in this circuit breaker are calibrated for standard continuous operation in a 40 degrees Celsius (104 degrees Fahrenheit) ambient environment.
Which lug kit is commonly used with the LXD63B450?
The standard mechanical lug kit for this LD frame breaker is the TA2J6500, which accommodates copper or aluminum wire sizes from 3/0 AWG to 500 kcmil.
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