MBK175 Siemens 175A 2-Pole Main Circuit Breaker Kit, 120/240V, 22kAIC

MBK175

MBK175 Siemens 175A 2-Pole Main Circuit Breaker Kit, 120/240V, 22kAIC

The Siemens MBK175 is a 175A, 2-pole, single-phase main circuit breaker rated 120/240V AC with a 22 kAIC interrupting rating at 240V, listed to UL 489. It is supplied as a kit with the mounting hardware required to install it as the main in a compatible Siemens Type EQ load center, converting a main-lug load center to a main-breaker load center. It serves as the EQ9684 main equivalent.

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The breaker uses a thermal-magnetic trip with a plug-in connection and occupies four single-pole mounting spaces. It supports residential and light commercial submittal packages requiring a 175A Family G main and is designed for panel convertibility and invertibility.

Common Applications

• 175A main circuit breaker duty at 120/240V single-phase
• Main breaker conversion in Siemens Type EQ main-lug load centers
• Direct EQ9684 main breaker replacement in legacy panels
• Residential and light commercial distribution upgrades

Key Features

• 175A main breaker: Two-pole molded case main for 120/240V service.
• UL 489 listed: Qualifies as a main overcurrent protective device.
• 22 kAIC interrupting: Standard interrupting rating at 240V AC.
• Thermal-magnetic trip: Combined overload and short-circuit protection.
• Plug-in connection: Mounts to the compatible Type EQ bus with included hardware.

Specifications

• Manufacturer: Siemens
• Catalog Number: MBK175 (EQ9684 main)
• Type: Main circuit breaker kit, Family G, Type EQ
• Amperage: 175A
• Poles: 2 (occupies four single-pole spaces)
• Phase: Single-phase
• Voltage: 120/240V AC
• Interrupting Rating: 22 kAIC at 240V
• Trip Type: Thermal-magnetic
• Connection: Plug-in
• Standard: UL 489

Product Identification

• Dimensions: 5.25 in x 3.25 in x 4.05 in
• Weight: 3 lb
• UPC: 662643673937

FAQ

What is the Siemens MBK175? It is a 175A, 2-pole, 120/240V main circuit breaker supplied with mounting hardware to install as the main in a compatible Siemens Type EQ load center.

Does the MBK175 fit Ultimate series panels? No. It fits legacy Type EQ main-breaker load centers and does not fit Ultimate, ES, or PL series panels.

What is the interrupting rating? 22 kAIC at 240V AC.

Is the MBK175 the same as the EQ9684 main? Yes, it serves as the EQ9684 main breaker equivalent for EQ-series panels.

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Specifications