Siemens B350 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 50 Amps and a voltage rating of 240VAC. It has an interrupting rating of 10kAIC at 240VAC. The B350 has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
Brand
Siemens
Series
BL
Amperage
50
Voltage
240VAC
Poles
3
Phase
3
Mounting Type
Bolt-On
Approval
UL
Interrupting Rating
10kAIC at 240VAC
Frame Type
B
Connection Type
Bolt-On
Protection
Thermal Magnetic
Functions
Long Time and Instantaneous Trip
Terminal Connection
Load Side Lug
Length (in)
3
Width (in)
3
Height (in)
4
For Use With
P1 Panelboards
Temperature Rating
40 °C
Circuit Breaker Type
Standard
Actuator Type
Toggle
Max Wire Size
AWG 4, Al, AWG 6, Cu
Min Wire Size
AWG 8
Mpn
B350
Upc
783643263758
Gtin
783643263758
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4.9
Rated 4.9 out of 5 stars
Based on 70 reviews
5
Rated out of 5 stars
68
Total 5 star reviews: 68
4
Rated out of 5 stars
1
Total 4 star reviews: 1
3
Rated out of 5 stars
0
Total 3 star reviews: 0
2
Rated out of 5 stars
0
Total 2 star reviews: 0
1
Rated out of 5 stars
1
Total 1 star reviews: 1
Reviews Summary
Generated by AI from 66 most recent customer reviews
Last updated 8/15/25
Customers say these circuit breakers meet their specifications and perform as expected. Many reviews highlight the quick delivery times and competitive pricing. Frequent comments address the reliable product quality and ease of installation. The ordering process receives praise for its simplicity, with users noting consistent product availability.
Website description and purchase # reflect new...i got used breakers and they charged me new
I sent this email to the "contact us" address and no response. I’m reaching out regarding my recent order of circuit breakers order # 10030572092, Upon inspection, the breakers I got show clear signs of prior use (bolt down holes have gouges where theyve been attached to a panel). These were sold and invoiced as new units.
When placing the order, I had originally wanted refurbished breakers but it said that sufficient stock was unavailable—so I chose to purchase new ones at the higher price. Given that the items received are used, I’m requesting a credit for the difference between the new and refurbished pricing.
If this adjustment cannot be made, please confirm the process for returning the used breakers for a full refund.
I would appreciate a prompt response so this can be resolved quickly.