Main Breaker Kits
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Part #SIEM MBK100A 100AMP MAIN BREAKER KIT FOR USE IN ULTIMATE LOADCENTERS 1PHASE Siemens Main Breaker Kit, Type ST Low Voltage Transfer Switch, 120/240 VAC, 100 A, 22 kA Interrupt, EQ Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, NEMA 1 Enclosure, Bolt-On/P
MFG #MBK100A
13 in Stock. More available 04/20/2026
$69.18/EA
Part #SIEM MBK200 200AMP MAIN BREAKER KIT FOR USE IN EQIII LOADCENTERS 1PHASE (OLDER STYLE) LOOKS LIKE A 4POLE Siemens Molded Case Circuit Breaker, Type EQ, 120/240 VAC, 200 A, 22 kA Interrupt, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bolt-On Connection, 6.5 i
MFG #MBK200
5 in Stock. More available 04/02/2026 and 04/20/2026
$188.74/EA
Part #SIEM MBK200A 200AMP MAIN BREAKER KIT FOR USE IN ULTIMATE LOADCENTERS 1PHASE (NEW STYLE) EQ8695 Siemens Molded Case Circuit Breaker, Type EQ, 120/240 VAC, 200 A, 22 kA Interrupt, EQ Frame, LI/Thermal Magnetic Trip, 2 Pole, 1 ph, Bolt-On Connection, 6.
MFG #MBK200A
11 in Stock. More available 04/06/2026 and 04/20/2026
$174.31/EA
Part #SIEM MBK100A 100AMP MAIN BREAKER KIT FOR USE IN ULTIMATE LOADCENTERS 1PHASE Siemens Main Breaker Kit, Type ST Low Voltage Transfer Switch, 120/240 VAC, 100 A, 22 kA Interrupt, EQ Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, NEMA 1 Enclosure, Bolt-On/P
MFG #MBK100A
13 in Stock. More available 04/20/2026
$69.18/EA
Part #SIEM MBK200 200AMP MAIN BREAKER KIT FOR USE IN EQIII LOADCENTERS 1PHASE (OLDER STYLE) LOOKS LIKE A 4POLE Siemens Molded Case Circuit Breaker, Type EQ, 120/240 VAC, 200 A, 22 kA Interrupt, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bolt-On Connection, 6.5 i
MFG #MBK200
5 in Stock. More available 04/02/2026 and 04/20/2026
$188.74/EA
Part #SIEM MBK200A 200AMP MAIN BREAKER KIT FOR USE IN ULTIMATE LOADCENTERS 1PHASE (NEW STYLE) EQ8695 Siemens Molded Case Circuit Breaker, Type EQ, 120/240 VAC, 200 A, 22 kA Interrupt, EQ Frame, LI/Thermal Magnetic Trip, 2 Pole, 1 ph, Bolt-On Connection, 6.
MFG #MBK200A
11 in Stock. More available 04/06/2026 and 04/20/2026
$174.31/EA