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1-800-9981621

Main Breaker Kits

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SIEM Q2200B
SIEM Q2200B
Part #SIEM Q2200B 200AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER Siemens Molded Case Circuit Breaker, Type QPP, 120/240 VAC, 200 A, 60 Hz Frequency, 10 kA Interrupt, Thermal/Magnetic Trip, 2 Pole, 1 ph, Plug-In Connection, 3/0 AWG to 250 kcmil Wire, 12.9
MFG #Q2200B
6 in Stock. More available 02/26/2026
$345.03/EA
Regular Price: $354.00/EA, you save $8.98 (3%)
SIEM MBK100AÿSIEM MBK100A
SIEM MBK100A
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
11 in Stock. More available 02/23/2026
$116.92/EA
Regular Price: $732.00/EA, you save $615.08 (84%)
SIEM MBK200ÿSIEM MBK200
SIEM MBK200
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 02/09/2026 and 02/23/2026
$288.22/EA
Regular Price: $2039.00/EA, you save $1,750.78 (86%)
SIEM MBK200AÿSIEM MBK200A
SIEM MBK200A
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
10 in Stock. More available 02/09/2026 and 02/23/2026
$294.70/EA
Regular Price: $1845.00/EA, you save $1,550.30 (84%)
SIEM Q2200B
SIEM Q2200B
Part #SIEM Q2200B 200AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER Siemens Molded Case Circuit Breaker, Type QPP, 120/240 VAC, 200 A, 60 Hz Frequency, 10 kA Interrupt, Thermal/Magnetic Trip, 2 Pole, 1 ph, Plug-In Connection, 3/0 AWG to 250 kcmil Wire, 12.9
MFG #Q2200B
6 in Stock. More available 02/26/2026
$345.03/EA
Regular Price: $354.00/EA, you save $8.98 (3%)
SIEM MBK100AÿSIEM MBK100A
SIEM MBK100A
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
11 in Stock. More available 02/23/2026
$116.92/EA
Regular Price: $732.00/EA, you save $615.08 (84%)
SIEM MBK200ÿSIEM MBK200
SIEM MBK200
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 02/09/2026 and 02/23/2026
$288.22/EA
Regular Price: $2039.00/EA, you save $1,750.78 (86%)
SIEM MBK200AÿSIEM MBK200A
SIEM MBK200A
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
10 in Stock. More available 02/09/2026 and 02/23/2026
$294.70/EA
Regular Price: $1845.00/EA, you save $1,550.30 (84%)