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Siemens MD63B600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Siemens
MD63B600
Molded Case Circuit Breaker
Brand
Siemens
SKU
MD63B600
Quantity
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Siemens MD63B600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens MD63B600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MD63B600 |
| Series | MD6 |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 250VDC |
| Frame Type | MD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens S4, S5, P4, P5, SPP, FPP Panelboards, SB1, SB2, SB3 Switchboards, Motor Control Centers |
| Wire Gauge | (3) 1/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 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 |
|---|---|
| Accessories | Line and Load Side Lugs (TA3K500) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Quantity
Siemens MD63B600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MD63B600-R |
| Series | MD6 |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 250VDC |
| Frame Type | MD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens S4, S5, P4, P5, SPP, FPP Panelboards, SB1, SB2, SB3 Switchboards, Motor Control Centers |
| Wire Gauge | (3) 1/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 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 |
|---|---|
| Accessories | Line and Load Side Lugs (TA3K500) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
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Description
Built for commercial and industrial applications, the MD63B600 is a 600A molded case circuit breaker from the Siemens Sentron series. It utilizes an interchangeable thermal-magnetic trip unit to provide reliable long-time and instantaneous (LI) protection. The breaker is compatible with Siemens S4, S5, P4, and P5 panelboards, along with SB1, SB2, and SB3 switchboards. Rated for 600VAC with a 50kAIC capacity at 480V, it comes equipped with TA3K500 lugs to accommodate 1/0 AWG to 500 kcmil wire.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MD63B600 |
| Series | MD6 |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 250VDC |
| Frame Type | MD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens S4, S5, P4, P5, SPP, FPP Panelboards, SB1, SB2, SB3 Switchboards, Motor Control Centers |
| Wire Gauge | (3) 1/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 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 |
|---|---|
| Accessories | Line and Load Side Lugs (TA3K500) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
7 answersWhich Siemens panelboards and switchboards are compatible with the MD63B600?
This SENTRON series breaker is designed for bolt-on installation in Siemens S4, S5, P4, P5, SPP, and FPP panelboards. It is also compatible with SB1, SB2, and SB3 switchboards, as well as select Siemens Motor Control Centers.
What are the wire size requirements for the standard lugs on this 600A breaker?
The factory installed mechanical lugs accept three conductors per phase. They are rated for 1/0 AWG to 500 kcmil aluminum or copper wire. Always verify that your conductor insulation and ambient temperature ratings align with the National Electrical Code (NEC) for a 600A circuit.
How does the adjustable magnetic trip function operate on the MD63B600?
This breaker features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection at 600A. The magnetic instantaneous trip is adjustable, allowing electricians to fine-tune the short-circuit response to coordinate with downstream devices and prevent nuisance tripping from motor inrush currents.
Can the Siemens MD63B600 replace older I-T-E brand breakers with the same part number?
Yes. Siemens acquired I-T-E and continued manufacturing the SENTRON molded case circuit breaker line. A modern Siemens MD63B600 is a direct, drop-in replacement for legacy I-T-E MD63B600 breakers, maintaining the same physical dimensions and mounting footprint.
Is this breaker suitable for direct current (DC) applications?
Yes, the MD63B600 carries a DC interrupting rating of 25kA at 250VDC. This makes it suitable for industrial DC motor control, battery storage systems, and other specialized direct current applications within its voltage limit.
Does the MD63B600 mount directly to a DIN rail?
No. This is an MD frame unit mount breaker designed for bolt-on connections in heavy-duty distribution equipment. It is too large for standard DIN rail mounting and must be secured to a dedicated breaker mounting bracket or baseplate within a panelboard or switchboard.
What maintenance is required for the thermal-magnetic trip unit?
Thermal-magnetic trip units are sealed and require no internal maintenance. However, routine visual inspections, periodic exercising of the toggle mechanism, and verifying lug torque during scheduled facility shutdowns are recommended to ensure reliable operation and safety.
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