Overview
The Tyco Electronics 27E891 is a general-purpose relay socket engineered for industrial control and automation systems. This 8-pin octal socket is rated for 10 Amperes at 300 Volts AC and features screw-terminal connections for permanent installation. With its spring-loaded latching mechanism and DIN rail mounting capability, the 27E891 provides secure, repeatable relay mounting in panel and rail-based control enclosures.
Key Features
- 8-pin octal socket for KRPA-series relays and compatible 8-pin devices
- Screw terminal connections for positive, vibration-resistant wire retention
- Spring-loaded latch design for quick insertion and removal from DIN rail or panel mounts
- PolyMide body construction—dustproof, oil-resistant, and weather-resistant
- UL E59244 and CSA LR15734 approvals for North American electrical standards
- Rated 10A at 300VAC; suitable for general-purpose and industrial control relays
Technical Specifications
- Current Rating: 10 Amperes AC
- Voltage Rating: 300 Volts AC
- Socket Configuration: 8-pin octal (round)
- Terminal Type: Screw terminals
- Body Material: PolyMide (glass-filled polyester alternative)
- Contact Material: Spring brass, tin plated
- Mounting Type: DIN rail or panel mount
- Mounting Hardware: Two #6-32 screws (panel); two 24A071 or 24A072 retainer clips (DIN rail)
- Certifications: UL E59244, CSA LR15734
- Compliance: IEC 61810-1 standard relay socket
- Part Number: 27E891
- Manufacturer: Tyco Electronics (TE Connectivity)
Typical Applications
The 27E891 relay socket is ideal for industrial control panels, motor starter circuits, HVAC equipment, and factory automation systems where KRPA or similar 8-pin octal relays are deployed. Its screw-terminal design suits applications requiring permanent wiring in harsh or vibration-prone environments. Common uses include:
- General-purpose relay mounting in industrial control enclosures
- HVAC control systems and heating/cooling automation
- Motor control and starter circuit logic
- Factory automation and process control panels
- Machinery protection and interlocking circuits
- Building automation and emergency systems
Compatibility & Replacements
Compatible With
- KRPA series relays (8-pin octal base)
- KCP relays (8-pin compatible devices)
- R10-T relays with 8-pin octal plugs
- Any 8-pin octal relay base requiring screw-terminal connection
- DIN-rail and panel-mount control systems
- Standard industrial control enclosures and switchboards
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 27E891 is a socket base and does not directly replace relays themselves, but serves as the mounting platform for compatible 8-pin octal relay models.
Works With
- Potter & Brumfield relay product line (KRPA, KCP)
- Tyco Electronics relay portfolio
- Standard 8-pin octal relay contactors and timers
- Industrial control networks requiring discrete relay switching
- Panel and rail-mounted automation systems
