Overview
The Cutler Hammer E50SB /A2 is a 2-pole, 4PST (4-pole single-throw) plug-in limit switch body designed for use with the E50 series heavy-duty industrial limit switches. The E50SB is a 2-pole 4PST (4-pole single-throw) 2NO-2NC Switch Body without indicating light and supports panel mount. This unitized body is manufactured by Eaton (Cutler Hammer division) and provides reliable contact switching in demanding industrial environments.
Key Features
- Contact Configuration: 2NO-2NC contacts
- Construction: Zinc die-cast construction with standard Viton gaskets and seals
- Rating: 10A@240Vac, 1A@250Vdc
- Operating Temperature: 14-250F (-10-121C)
- Enclosure Rating: NEMA 1, 2, 3S, 4X, 6P, 13; IP67
- Mechanical Life: 10M cycles mechanical, 1M cycles electrical, 8000 cy/hr operating speed
- Termination: 9-pin receptacle, 1/2 NPT conduit connection
Technical Specifications
- Poles: 2
- Contact Type: 2NO-2NC (Normally Open / Normally Closed)
- Voltage Rating: 240 VAC / 250 VDC (maximum)
- Current Rating: 10 A at 240 VAC; 1 A at 250 VDC
- Mounting Style: Panel-mount plug-in
- Enclosure Material: Zinc die-cast with Viton seals and gaskets
- Environmental Rating: NEMA 1, 2, 3S, 4X, 6P, 13 and IP67 (suitable for machine tool coolants, hydraulic fluids, cleaning agents)
- Operating Temperature Range: 14–250°F (–10 to 121°C)
- Mechanical Cycle Life: 10 million cycles
- Electrical Cycle Life: 1 million cycles at full load
- Operating Speed: 8,000 cycles/hour
- Conduit Connection: 1/2 NPT
- Certifications: UL Listed, CSA Certified, CE compliant
Typical Applications
This body is suitable for Eaton E50 series heavy duty limit switches. The E50SB is commonly used in:
- Machine tool position sensing and end-of-travel detection
- Industrial automation systems requiring heavy-duty switching
- Automotive and manufacturing assembly lines
- Wastewater treatment and chemical processing equipment
- Hydraulic and pneumatic systems requiring chemical-resistant contacts
- Equipment retrofits requiring NEMA or DIN standard mounting
Compatibility & Replacements
Compatible With
- Eaton E50 Series heavy-duty limit switch operating heads and receptacles
- E50RA and E50RB receptacles
- Standard mounting rails and panel-mount installations (both U.S. and DIN standards)
Replaces / Drop-In Replacement For
- E50SB standard catalog units without /A2 designator
- Legacy Cutler Hammer E50 series switch bodies requiring 2NO/2NC contact configuration
Works With
- All E50 series operating heads (rotary, pushbutton, selector switch types)
- Standard industrial control systems using plug-in limit switches
- Applications requiring NEMA 4X or IP67 environmental protection
