Overview
The Airpax UPL111-1-61-153-C magnetic circuit breaker is a single-pole supplementary protector designed for DC applications requiring short-delay trip characteristics. Manufactured by Sensata Technologies (formerly Airpax), this unit combines precise electromagnetic protection with rugged, reliable construction. The UPL111 series is recognized under UL Standard 1077 and CSA Standard C22.2 No. 235, making it suitable for industrial control systems, aircraft equipment, and DC power distribution circuits.
Key Features
- Single-pole magnetic circuit breaker with short-delay (61) characteristic for general-purpose DC applications
- UL STD. 1077 and CSA STD. C22.2 No. 235 recognized supplementary protector
- Compact panel-mount design for space-constrained installations
- Wide operating temperature range from –40°C to +85°C
- High insulation resistance (≥100 megohms at 500 VDC)
- Lever-operated manual reset mechanism with positive trip indication
Technical Specifications
Input voltage, current rating, and mounting configuration are determined by the complete part number suffix codes. The 153 code designates the current rating, and the C suffix specifies voltage and case configuration. For exact voltage and amperage ratings, refer to the manufacturer’s part number decoding guide or datasheet. Operating characteristics include ±20% to ±50% current tolerance (depending on amperage range) and a minimum insulation resistance of 100 megohms at 500 VDC.
Typical Applications
- DC aircraft and aerospace electrical systems
- Industrial control panel protection
- Emergency lighting and backup power circuits
- Telecommunications and data center power distribution
- Marine and mobile equipment DC bus protection
Compatibility & Replacements
Compatible With
- DC power systems rated up to 65 VDC (typical for variant C models)
- Industrial control cabinets and distribution panels
- Legacy aircraft and aerospace electrical systems
- Telecommunications and marine electrical networks
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Airpax UPL111 series has been produced in multiple configurations; direct replacement models must match pole count, delay characteristic, current rating, and voltage rating to ensure proper operation.
Works With
- Manual DC circuit distribution systems
- No software or digital integration required; mechanical operation only
- Compatible with standard panel-mount breaker enclosures using 1-inch spacing
