Overview
The Allen-Bradley 700-N400A1 is a low-profile, high-reliability industrial control relay from the Bulletin 700-N family. Rated for 4 normally open (4NO) contacts at 10 amps, this relay operates on 120V AC 60Hz (110V 50Hz international equivalent) and is designed for interposing between PLC outputs and higher-power loads in machine tool and heavy-duty automation systems. The relay delivers proven performance across electrical isolation, pilot-duty switching, and general-purpose control applications.
Key Features
- Four normally open (4NO) contacts for flexible circuit switching
- 10-amp contact rating suitable for general-purpose and heavy pilot-duty loads
- 120V AC 60Hz / 110V 50Hz dual-voltage operating coil
- Low-profile design with manual override and easy-to-identify red status indicator
- UL-listed and NEMA-certified for industrial control systems
- Drop-in replacement for Bulletin 700-N systems
Technical Specifications
Contact and Electrical Ratings:
- AC Contact Rating: 300V AC maximum, 10A non-inductive (heavy pilot duty)
- DC Contact Rating: 250V DC maximum; 11A @ 125VDC or 0.55A @ 250VDC
- Contact Configuration: 4 Normally Open (4NO)
Coil Specifications:
- Operating Voltage: 120V AC 60Hz / 110V 50Hz
- Coil Code: 84AB86
Typical Applications
The 700-N400A1 excels in motor-control circuits, machine-tool interlocking, solenoid and contactor switching, and pneumatic/hydraulic system control. Common uses include general-purpose industrial switching, electrical isolation between low-level controls and high-power circuits, and distribution-panel relay logic applications. Its 10-amp contact rating suits both AC inductive loads and DC resistive switching.
Compatibility & Replacements
Compatible With
- Bulletin 700-N NEMA low-profile industrial control relay systems
- Allen-Bradley Series C relay assemblies and base units
- Standard 24V and 120V industrial control panels
- PLC output interposing and load-switching applications
Replaces / Drop-In Replacement For
The 700-N400A1 is a direct replacement for equivalent Series C 700-N400 AC relays with 4NO contact configuration and 120V AC coil. Alternate part numbers include 700N400A1 and UPC 781180287015. For time-delayed variants, consider the 700-NT400A1 (pneumatic timer version), which uses the 700-N400A1 as its base relay unit.
Works With
- Allen-Bradley PowerFlex drives and PLC systems
- NEMA motor-control standards and IEC-equivalent relay bases
- Standard relay sockets and mounting rails (verify base compatibility)
- Industrial automation and machine-control logic circuits
