Square D QOB1251021 Miniature Circuit Breaker – 25A – 1 Pole – Thermal Magnetic – Bolt-On – 120/240VAC – Shunt Trip

The Square D QOB1251021 is a 1-pole miniature circuit breaker designed for branch circuit protection in NQ series panelboards. Featuring thermal magnetic trip protection, a factory-installed 120/208/240VAC shunt trip, and the Visi-Trip® indicator, it provides dependable protection for lighting, appliance, and general-purpose electrical circuits. Its bolt-on mounting design ensures secure installation in commercial and industrial panelboard applications.

Electrical Ratings

• Current Rating: 25 A
• Voltage Rating: 120/240 VAC, 50/60 Hz
• DC Voltage Rating: 48 VDC
• Poles: 1 Pole
• Phase: Single Phase
• Interrupting Rating:
  • 10 kA @ 120/240 VAC
  • 5 kA @ 48 VDC
• Application: Appliance and lighting circuits

Protection and Function

• Tripping Method: Thermal Magnetic
• Circuit Breaker Type: Miniature Branch Circuit Breaker
• Factory-Installed Shunt Trip: 120/208/240 VAC
• Visi-Trip® Indicator for quick fault identification
• Provides overload and short-circuit protection
• Suitable for branch circuit protection in panelboards

Configuration and Function

• Series: QO® / QOB
• Catalog Number: QOB1251021
• Model: QOB
• Frame Type: Q Frame
• Mounting Type: Bolt-On
• Used On: NQ Series Panelboards
• Category: 1-Pole Standard Trip Bolt-On Circuit Breaker
• Control Function: Remote tripping through integrated shunt trip

Mechanical and Physical Characteristics

• Dimensions (H × W × D): 3.00 in × 0.75 in × 2.91 in
• Overall Width with Housing: 1.50 in
• Terminal Type: Pressure Plate
• Wire Size:
  • 14–8 AWG Aluminum/Copper
  • (2) 14–10 AWG Copper
• Ambient Temperature Rating: 104°F (40°C)
• Compact space-saving design for panelboard installations

Standards and Certifications

• UL Listed
• CSA Certified
• RoHS Compliant
• Manufacturer: Schneider Electric / Square D
• UNSPSC: 39121603

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.