Overview
The Allen-Bradley 700-HT12AU120 is a tube base timing relay engineered for precise on-delay control in industrial machinery and control panels. This compact, plug-in design delivers repeatable timing performance across AC and DC coil voltages, making it ideal for equipment startup sequencing, motor soft-starters, and intermittent process control.
Key Features
- Double-pole, double-throw (DPDT) contact configuration rated 10 A per contact
- Dual coil voltage: 120 VAC (50/60 Hz) or 120 VDC
- Adjustable timing range: 0.1 to 10 seconds (on-delay mode)
- Rugged tube base construction with pin-style socket mounting
- Field-adjustable potentiometer for precise delay calibration
- Stable timing across typical industrial temperature and humidity ranges
Technical Specifications
The 700-HT12AU120 meets industrial control standards and integrates seamlessly into retrofit and new-build control systems where timing precision and contact reliability are critical.
Typical Applications
- Motor starter soft-start and ramp-up sequencing
- Pump fill/drain cycle control and interlocking
- Sensor warm-up delays and stabilization timing
- PLC output pulse conditioning and edge-triggered logic
- Equipment interlock sequencing and safety shutdown delays
- Industrial process automation and production line synchronization
Compatibility & Replacements
The 700-HT12AU120 is part of the Allen-Bradley 700-H general-purpose relay family. Direct tube-base alternatives in the series include the 700-HN models for off-delay timing. When retrofitting legacy control panels, verify socket compatibility and coil voltage (AC vs. DC) before substitution. For solid-state alternatives, consider Allen-Bradley SSR output modules in CompactLogix or ControlLogix systems.
