Overview
The Burgess BS1004 A is a snap-action plunger limit switch engineered for industrial automation and machinery control applications. This used unit features multi-voltage contact ratings: 10A at 125VAC, 5A at 250VAC, and 2A at 600VAC—providing flexible integration into various electrical control circuits. The BS1004 A delivers reliable position-detection and equipment sequencing across manufacturing, packaging, and industrial processing environments.
Key Features
- Snap-action mechanism for quick, reliable contact changeover
- Plunger actuator with robust coil spring and stainless steel construction
- Multi-voltage rated: 10A @ 125VAC, 5A @ 250VAC, 2A @ 600VAC
- Compact form factor suitable for retrofit and OEM applications
- Single-pole changeover (SPDT) contact configuration
- Durability rated to thousands of mechanical cycles (UL 1054 compliance)
Technical Specifications
- Manufacturer: Burgess (SAIA-Burgess Controls / Johnson Electric)
- Model: BS1004 A
- Actuator Type: Plunger (spring-return, flush-depressible)
- Contact Configuration: SPDT (Single-Pole Double-Throw)
- Contact Rating @ 125VAC: 10A
- Contact Rating @ 250VAC: 5A
- Contact Rating @ 600VAC: 2A
- Mechanism: Snap-action with stainless steel spring
- Operating Approval: UL 1054 / CSA 22.2 No. 55
- Lifecycle Rating: 6,000+ mechanical operations
- Condition: Used, fully functional
Typical Applications
The Burgess BS1004 A limit switch is used in:
- Position sensing and limit-of-travel detection on machinery and conveyors
- Emergency stop and interlock circuits
- Process sequencing in packaging and assembly equipment
- Valve and gate control actuation
- Door and access-point interlocks in industrial systems
- Retrofit integration into existing control panels and enclosures
Compatibility & Replacements
Compatible With
- Industrial AC control circuits (125V, 250V, 600V rated systems)
- Manual and automatic machinery control systems
- Programmable logic controllers (PLCs) via discrete input modules
- Electromechanical relay logic and contactor circuits
- Standard 24–480V industrial enclosures and cabinets
Replaces / Drop-In Replacement For
The BS1004 A is a direct replacement for other Burgess BS1004 series limit switch variants. For exact cross-reference compatibility with competing brands (Honeywell BZ, Eaton E50, Omron D4C, etc.), verify wiring diagrams and contact ratings with your system integrator before ordering.
Works With
- Electromechanical control relays and contactors
- Standard AC industrial control circuits and motor starters
- Discrete I/O modules in PLCs and PACs (via standard wired connections)
- Emergency stop and safety circuits per ANSI B11.19
- Pneumatic and hydraulic valve activation systems
