Built for demanding electrical environments, the Siemens HGB2B025B is a 2-pole, 25A molded case circuit breaker. It utilizes fixed thermal and magnetic trip units to safeguard commercial and industrial branch circuits against overloads and short circuits. Designed for bolt-on installation, this breaker fits seamlessly into Siemens P1, P2, and P3 panelboards. If a replacement is needed, it transitions to the 3VA4125-5ED24-0AA0 using an xGB/3VA strap kit.
Which Siemens panelboards are compatible with the HGB2B025B breaker?
This bolt-on breaker is designed specifically for use in Siemens P1, P2, and P3 commercial panelboards. It mounts directly to the panel bus using a bolt-on connection.
Can I use this breaker in a standard residential load center?
No. The HGB2B025B is a commercial molded case circuit breaker with a bolt-on mounting style. It will not fit in standard plug-on residential load centers.
What wire sizes are accepted by the terminal lugs on this breaker?
The factory-installed lugs accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire. Always ensure proper torque specifications are followed during installation.
Is the HGB2B025B suitable for direct current (DC) applications?
Yes, this breaker is rated for DC systems up to 125/250VDC, providing a maximum interrupting capacity of 14kA for those applications.
How does the interrupting rating change between 240V and 480V applications?
The HGB2B025B provides a high interrupting capacity of 100kA when used in 240VAC systems. When applied to 480Y/277VAC systems, the interrupting rating is 35kA. Always verify the available fault current at your specific panel.
Can the trip settings be adjusted on this 25A breaker?
No, the HGB2B025B features a fixed thermal-magnetic trip unit. It provides standard Long-Time and Instantaneous (LI) protection without adjustable dials.
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