Built for commercial applications, the Siemens E1SQJ23B20000S01 is a complete, factory-assembled enclosed circuit breaker. It features a NEMA 1 surface-mount enclosure housing a 200A, 3-pole QJ frame molded case breaker. This unit includes a factory-installed 120/240VAC shunt trip and load-side lugs, streamlining installation for service entrance protection. It replaces legacy QR2N1 and QR23B200 configurations. Rated 10 kAIC at 240VAC, it delivers reliable thermal-magnetic (LI) protection.
What types of panelboards are compatible with the E1SQJ23B20000S01 breaker?
This QJ frame breaker is designed for installation in Siemens P1, P2, and P3 panelboards, as well as compatible switchboards and meter centers.
Is this breaker a direct replacement for the standard QJ23B200?
Yes, the E1SQJ23B20000S01 shares the exact same QJ frame footprint, 200A rating, and bolt-on mounting as the standard QJ23B200, making it a direct replacement for commercial distribution equipment.
Can I use a QR frame breaker to replace this QJ frame model?
Yes, the newer Siemens QR frame (such as the QR23B200) was designed as the direct replacement for the legacy QJ frame. Both frames share the same form factor and mounting dimensions for easy retrofitting.
Does this breaker require a specific mounting kit for panelboard installation?
Yes, when installing in Siemens P1, P2, or P3 panelboards, QJ frame breakers require specific strap kits or mounting hardware. The exact kit depends on whether the breaker is single-mounted or twin-mounted in the panel.
Are the trip settings adjustable on this circuit breaker?
No, the E1SQJ23B20000S01 features a fixed thermal-magnetic trip unit with non-interchangeable long-time and instantaneous trip functions.
Is the E1SQJ23B20000S01 suitable for reverse feed applications?
Yes, Siemens QJ frame breakers support reverse feed applications and are HACR rated for use with heating, air conditioning, and refrigeration equipment.
Can I install this QJ frame breaker in a panelboard from a different manufacturer?
No. To maintain the UL listing and ensure safe operation, Siemens QJ frame breakers must only be installed in Siemens or legacy ITE panelboards that are specifically labeled to accept them.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 10 reviews.
Siemens QJ23B125 - 125A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
9/11/26
Breaker
Perfect
TN
Timothy N.
Verified Buyer
Reviewing
Siemens QJ23B200 - 200A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
7/27/26
10% off
Arrived on time, worked when turned on
WK
Willie K.
Verified Buyer
Reviewing
Siemens QJ23B150 - 150A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 4 out of 5 stars
7/22/26
Breaker
The Breaker arrive fast and in good condition however when I looked at the specs it was not the correct one.
PG
Phil G.
Verified Buyer
Reviewing
Siemens QJ23B200 - 200A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
3/3/26
Great Service
I was in a bind for this breaker that was for an elevator, and Nick got me all the components even though their blizzard! Will use them for all my specialty breakers.
VC
Vladimir C.
Verified Buyer
Reviewing
Siemens QJ22B200 - 200A 2 Pole Molded Case Circuit Breaker
I recommend this product
Rated 4 out of 5 stars
12/10/25
4 start
The breaker was it perfect match.,but it was missing the two top bolts.