Overview
The Potter & Brumfield CLB-51-70120 is a proven 120VAC on-delay time delay relay designed for precise timing control in industrial automation and process control applications. Manufactured by TE Connectivity Potter & Brumfield, this relay features a compact DPDT contact form, wide delay range, and socketable construction that simplifies installation and field replacement.
Key Features
- On-delay timing mode—timing cycle begins when input voltage is applied
- DPDT (2 Form C) double-pole double-throw contact configuration
- Adjustable delay range of 1.2 to 120 seconds via front-mounted knob
- Socketable design for quick insertion into compatible sockets
- Proven electromechanical construction for reliable industrial use
- Yellow plastic case for easy identification and durability
Technical Specifications
- Coil Voltage: 120VAC
- Contact Configuration: DPDT (2 Form C)
- Contact Rating: 10A @ 277VAC; 10A @ 30VDC
- Delay Range: 1.2 to 120 seconds
- Timing Mode: On-delay (delay on operate)
- Enclosure: Yellow plastic case
- Termination: 0.187″ quick-connect or solder terminals
- Mounting: Socketable on 27E-series sockets
- Manufacturer: TE Connectivity Potter & Brumfield
Typical Applications
- Motor soft-start and sequential control circuits
- Pump and compressor startup sequencing
- Heating, ventilation, and cooling (HVAC) delay circuits
- Industrial process timing and lockout functions
- Panel-mounted control logic in distribution and switchgear
- Equipment protection circuits requiring timed output delays
Compatibility & Replacements
Compatible With
- 27E043 solder eyelet socket (15A rated)
- 27E067 PCB terminal socket (15A rated)
- 27E121 screw terminal socket (15A rated)
- 27E893 DIN rail snap-mount socket
- Standard industrial control panels and enclosures
- Relay logic circuits requiring 120VAC coil voltage
Replaces / Drop-In Replacement For
- Potter & Brumfield CLB-51-70010 (10-second fixed delay variant)
- Other CLB-51 series 120VAC time delay relays
- Legacy TE Connectivity CL-series on-delay timing relays
Works With
- Manual relay logic control schemes
- Hardwired panel control circuits
- PLC auxiliary circuit outputs (24VDC or higher isolated)
- Standard control transformers and 120VAC distribution systems
