1-Phase Main Breaker

Filter

Skip to Results

Search Within Category

Stocked Items

In Stock

Country of Origin

Sub Brand

Special Features

Enclosure

Circuit Breaker Type

Results Per Page

8162448

18 items

Sort by

Sort PriorityProduct: A to ZProduct: Z to APrice: Low to HighPrice: High to LowTop ProductBest Match

Hide/Show Images

content loaded

SIEM SN4060B1200

Part #SIEM SN4060B1200 STD PNR LC MB 40S/60C 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 60 Circuits, 3-Wire Wiring Configura

MFG #SN4060B1200

31 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$9810.13/PL

Regular Price: $11424.00/PL, you save $1,613.87 (14%)

QTY

U/M

EA PL /21

ADD TO CARTADD TO LIST

SIEM SNW3048B1200

Part #SIEM SNW3048B1200 STD PNR LC MB 30S/48C 1PH 200A N3R GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 48 Circuits, 3-Wire Wiring Configu

MFG #SNW3048B1200

2 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$650.75/EA

QTY

ADD TO CARTADD TO LIST

SIEM SN2020B1100-KIT

Part #SIEM SN2020B1100-KIT STD PNR LC MB 20S/20C 1PH 100A INDOOR NEMA1 100AMP MAIN BREAKER GRY, BREAKERS INCLUDED(1)Q230 (6)Q120

MFG #SN2020B1100-KIT

39 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$319.81/EA

Regular Price: $359.80/EA, you save $39.99 (11%)

QTY

ADD TO CARTADD TO LIST

SIEM SN4040B1200-KIT

Part #SIEM SN4040B1200-KIT STD PNR LC MB 40S/40C 1PH 200A N1 200AMP MAIN BREAKER BREAKERS INCLUDED(6)Q115,(6)Q120,(1)Q230,(1) Q250

MFG #SN4040B1200-KIT

85 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$13780.94/SK

Regular Price: $16245.60/SK, you save $2,464.67 (15%)

QTY

U/M

EA SK /21

ADD TO CARTADD TO LIST

SIEM SN3048B1200

Part #SIEM SN3048B1200 STD PNR LC MB 30S/48C 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 48 Circuits, 3-Wire Wiring Configura

MFG #SN3048B1200

35 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$8583.75/BX

Regular Price: $9996.00/BX, you save $1,412.25 (14%)

QTY

U/M

EA BX /21

ADD TO CARTADD TO LIST

SIEM SN3030B1100

Part #SIEM SN3030B1100 STD PNR LC MB 30S/30C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 30 Circuits, 3-Wire Wiring Configura

MFG #SN3030B1100

27 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$5481.55/PL

Regular Price: $5523.00/PL, you save $41.45 (1%)

QTY

U/M

EA PL /21

ADD TO CARTADD TO LIST

SIEM SN3030B1150

Part #SIEM SN3030B1150 STD PNR LC MB 30S/30C 1PH 150A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 150 A, 22 kAIC Interrupt, 30 Circuits, 3-Wire Wiring Configura

MFG #SN3030B1150

10 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$401.07/BX

Regular Price: $448.00/BX, you save $46.93 (10%)

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN1224B1100

Part #SIEM SN1224B1100 STD PNR LC MB 12S/24C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 24 Circuits, 3-Wire Wiring Configura

MFG #SN1224B1100

6 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$233.24/EA

QTY

ADD TO CARTADD TO LIST

SIEM SN3030B1100-KIT

Part #SIEM SN3030B1100-KIT STD PNR LC MB 30S/30C 1PH 100A N1 ALUM BUS BAR,100AMP MAIN BREAKER GRY, BREAKERS INCLUDED,(1)Q230,(6)Q120

MFG #SN3030B1100-KIT

27 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$365.20/EA

Regular Price: $383.80/EA, you save $18.60 (5%)

QTY

ADD TO CARTADD TO LIST

SIEM SN5482B1200-KIT

Part #SIEM SN5482B1200-KIT STD PNR LC MB 54S/82C AL 1PH 200A N1 GRY,BREAKERS INCLUDED,(12)Q115,(12)Q115,(1)Q230. (1)Q250

MFG #SN5482B1200-KIT

9 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$1144.57/EA

Regular Price: $1294.60/EA, you save $150.03 (12%)

QTY

ADD TO CARTADD TO LIST

SIEM SNW0816B1200T

Part #SIEM SNW0816B1200T STD PNR LC MB 8S/16C 1PH 200A FTL N3R FEED THRU LUGS Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 16 Circuits, 3-Wire

MFG #SNW0816B1200T

22 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$379.95/BX

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN5482B1200

Part #SIEM SN5482B1200 STD PNR LC MB 54S/82C AL 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 82 Circuits, 3-Wire Wiring Config

MFG #SN5482B1200

9 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$782.99/BX

Regular Price: $873.00/BX, you save $90.01 (10%)

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN4040B1200

Part #SIEM SN4040B1200 STD PNR LC MB 40S/40C 1PH 200A N1 GRY ALUMINUM BUS Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 40 Circuits, 3-Wire Wir

MFG #SN4040B1200

85 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$10735.75/PL

Regular Price: $12768.00/PL, you save $2,032.25 (16%)

QTY

U/M

EA BX /24PL /24

ADD TO CARTADD TO LIST

SIEM SN3048B1200-KIT

Part #SIEM SN3048B1200-KIT STD PNR LC MB 30S/48C 1PH 200A N1 200AMP MAIN BREAKER GRY, BREAKERS INCLUDED(6)Q115,(6)Q120,(1)Q230,(1) Q250

MFG #SN3048B1200-KIT

35 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$617.66/EA

Regular Price: $717.60/EA, you save $99.94 (14%)

QTY

ADD TO CARTADD TO LIST

SIEM SN2020B1100

Part #SIEM SN2020B1100 STD PNR LC MB 20S/20C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 20 Circuits, 3-Wire Wiring Configura

MFG #SN2020B1100

39 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$6037.98/PL

Regular Price: $6692.00/PL, you save $654.02 (10%)

QTY

U/M

EA PL /28

ADD TO CARTADD TO LIST

SIEM SNW2020B1100

Part #SIEM SNW2020B1100 STD PNR LC MB 20S/20C 1PH 100A N3R GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 20 Circuits, 3-Wire Wiring Configu

MFG #SNW2020B1100

5 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$425.60/EA

QTY

ADD TO CARTADD TO LIST

SIEM SN4060B1200

Part #SIEM SN4060B1200 STD PNR LC MB 40S/60C 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 60 Circuits, 3-Wire Wiring Configura

MFG #SN4060B1200

31 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$9810.13/PL

Regular Price: $11424.00/PL, you save $1,613.87 (14%)

QTY

U/M

EA PL /21

ADD TO CARTADD TO LIST

SIEM SNW3048B1200

Part #SIEM SNW3048B1200 STD PNR LC MB 30S/48C 1PH 200A N3R GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 48 Circuits, 3-Wire Wiring Configu

MFG #SNW3048B1200

2 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$650.75/EA

QTY

ADD TO CARTADD TO LIST

SIEM SN2020B1100-KIT

Part #SIEM SN2020B1100-KIT STD PNR LC MB 20S/20C 1PH 100A INDOOR NEMA1 100AMP MAIN BREAKER GRY, BREAKERS INCLUDED(1)Q230 (6)Q120

MFG #SN2020B1100-KIT

39 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$319.81/EA

Regular Price: $359.80/EA, you save $39.99 (11%)

QTY

ADD TO CARTADD TO LIST

SIEM SN4040B1200-KIT

Part #SIEM SN4040B1200-KIT STD PNR LC MB 40S/40C 1PH 200A N1 200AMP MAIN BREAKER BREAKERS INCLUDED(6)Q115,(6)Q120,(1)Q230,(1) Q250

MFG #SN4040B1200-KIT

85 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$13780.94/SK

Regular Price: $16245.60/SK, you save $2,464.67 (15%)

QTY

U/M

EA SK /21

ADD TO CARTADD TO LIST

SIEM SN3048B1200

Part #SIEM SN3048B1200 STD PNR LC MB 30S/48C 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 48 Circuits, 3-Wire Wiring Configura

MFG #SN3048B1200

35 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$8583.75/BX

Regular Price: $9996.00/BX, you save $1,412.25 (14%)

QTY

U/M

EA BX /21

ADD TO CARTADD TO LIST

SIEM SN3030B1100

Part #SIEM SN3030B1100 STD PNR LC MB 30S/30C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 30 Circuits, 3-Wire Wiring Configura

MFG #SN3030B1100

27 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$5481.55/PL

Regular Price: $5523.00/PL, you save $41.45 (1%)

QTY

U/M

EA PL /21

ADD TO CARTADD TO LIST

SIEM SN3030B1150

Part #SIEM SN3030B1150 STD PNR LC MB 30S/30C 1PH 150A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 150 A, 22 kAIC Interrupt, 30 Circuits, 3-Wire Wiring Configura

MFG #SN3030B1150

10 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$401.07/BX

Regular Price: $448.00/BX, you save $46.93 (10%)

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN1224B1100

Part #SIEM SN1224B1100 STD PNR LC MB 12S/24C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 24 Circuits, 3-Wire Wiring Configura

MFG #SN1224B1100

6 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$233.24/EA

QTY

ADD TO CARTADD TO LIST

SIEM SN3030B1100-KIT

Part #SIEM SN3030B1100-KIT STD PNR LC MB 30S/30C 1PH 100A N1 ALUM BUS BAR,100AMP MAIN BREAKER GRY, BREAKERS INCLUDED,(1)Q230,(6)Q120

MFG #SN3030B1100-KIT

27 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$365.20/EA

Regular Price: $383.80/EA, you save $18.60 (5%)

QTY

ADD TO CARTADD TO LIST

SIEM SN5482B1200-KIT

Part #SIEM SN5482B1200-KIT STD PNR LC MB 54S/82C AL 1PH 200A N1 GRY,BREAKERS INCLUDED,(12)Q115,(12)Q115,(1)Q230. (1)Q250

MFG #SN5482B1200-KIT

9 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$1144.57/EA

Regular Price: $1294.60/EA, you save $150.03 (12%)

QTY

ADD TO CARTADD TO LIST

SIEM SNW0816B1200T

Part #SIEM SNW0816B1200T STD PNR LC MB 8S/16C 1PH 200A FTL N3R FEED THRU LUGS Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 16 Circuits, 3-Wire

MFG #SNW0816B1200T

22 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$379.95/BX

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN5482B1200

Part #SIEM SN5482B1200 STD PNR LC MB 54S/82C AL 1PH 200A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 82 Circuits, 3-Wire Wiring Config

MFG #SN5482B1200

9 in Stock. More available 02/18/2026 and 03/11/2026

VIEW BRANCH INVENTORY

$782.99/BX

Regular Price: $873.00/BX, you save $90.01 (10%)

QTY

U/M

EA BX

ADD TO CARTADD TO LIST

SIEM SN4040B1200

Part #SIEM SN4040B1200 STD PNR LC MB 40S/40C 1PH 200A N1 GRY ALUMINUM BUS Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 200 A, 22 kAIC Interrupt, 40 Circuits, 3-Wire Wir

MFG #SN4040B1200

85 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$10735.75/PL

Regular Price: $12768.00/PL, you save $2,032.25 (16%)

QTY

U/M

EA BX /24PL /24

ADD TO CARTADD TO LIST

SIEM SN3048B1200-KIT

Part #SIEM SN3048B1200-KIT STD PNR LC MB 30S/48C 1PH 200A N1 200AMP MAIN BREAKER GRY, BREAKERS INCLUDED(6)Q115,(6)Q120,(1)Q230,(1) Q250

MFG #SN3048B1200-KIT

35 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$617.66/EA

Regular Price: $717.60/EA, you save $99.94 (14%)

QTY

ADD TO CARTADD TO LIST

SIEM SN2020B1100

Part #SIEM SN2020B1100 STD PNR LC MB 20S/20C 1PH 100A N1 GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 20 Circuits, 3-Wire Wiring Configura

MFG #SN2020B1100

39 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$6037.98/PL

Regular Price: $6692.00/PL, you save $654.02 (10%)

QTY

U/M

EA PL /28

ADD TO CARTADD TO LIST

SIEM SNW2020B1100

Part #SIEM SNW2020B1100 STD PNR LC MB 20S/20C 1PH 100A N3R GRY Siemens SPEEDFAXâ„¢ Main Breaker Load Center, 1-Phase Assembled Low Voltage, Series: Standard SN Series, 120/240 VAC, 100 A, 22 kAIC Interrupt, 20 Circuits, 3-Wire Wiring Configu

MFG #SNW2020B1100

5 in Stock. More available 03/11/2026

VIEW BRANCH INVENTORY

$425.60/EA

QTY

ADD TO CARTADD TO LIST

Results Per Page

8162448