Siemens / ITE MN3B1000 Molded Case Circuit Breaker
- 1000A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE MN3B1000 - 1000A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed for heavy-duty applications, the Siemens MN3B1000 is a 3-pole, 1000A MCCB. It features a robust thermal-magnetic trip unit with adjustable magnetic settings to ensure precise protection. This bolt-on unit is fully compatible with Siemens P5 panelboards and SB1/SB2/SB3 switchboards. As a legacy component, it offers a seamless replacement for aging infrastructure, with the ND63B1000 serving as the modern equivalent. The breaker delivers a 65kAIC rating at 240VAC and 25kAIC at 600VAC.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | MN3B1000-R |
| Series | MN |
| Amperage | 1000A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | MN |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P5 Panelboards, SB1/SB2/SB3 Switchboards |
| Wire Gauge | 3 Cables: 250-500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| 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, Lug Kits |
|---|---|
| Accessories | GLK3 (Ground Lug Kit) |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
4 answersWhich Siemens distribution equipment is the MN3B1000 designed to fit?
This bolt-on MN frame breaker is engineered for use in Siemens P5 panelboards and SB1, SB2, and SB3 series switchboards.
How many conductors per phase do the standard lugs on the MN3B1000 accept?
The factory lugs are designed to terminate three conductors per phase, accepting 250 to 500 kcmil copper or aluminum wire.
What type of protection does the MN3B1000 trip unit provide?
It utilizes a thermal-magnetic trip unit that provides standard LI (Long-Time and Instantaneous) protection. The thermal element is fixed, while the magnetic instantaneous pickup can be adjusted to coordinate with other devices in your system.
Is the MN3B1000 considered a Siemens or ITE breaker?
The MN3B1000 is an authentic ITE product. Siemens acquired ITE, so these legacy MN frame breakers are often referenced under both the Siemens and ITE brand names for replacement purposes.
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