Eaton 70C1185R53 Industrial Control Relay

The 70C1185R53 is a versatile 4PDT (4 Form C) relay designed for industrial control circuits. It features silver cadmium oxide contacts rated for 10A at 240VAC/28VDC resistive. The 120VAC coil is encapsulated for protection against harsh environments, and the relay plugs into standard octal sockets for easy replacement.

Contact Ratings

Each contact is rated: 10A at 240VAC (resistive), 1/2 HP at 120VAC (motor load), 5A at 28VDC. Maximum switching power is 2400VA (AC) or 150W (DC). Contacts are double-break design ensuring reliable interruption of inductive loads. Mechanical life exceeds 10 million operations; electrical life at full load is typically 100,000 operations.

Coil Specifications

The coil is designed for 120VAC, 60Hz (or 50Hz). Coil power consumption is approximately 5VA (inrush) and 2.5VA (holding). Operating voltage range is 85-110% of rated voltage. The coil is insulated for continuous duty and includes a suppression network (optional) to reduce EMI when switching inductive loads. An LED indicator (built-in) illuminates when coil is energized, and a mechanical flag provides visual confirmation of armature position.

Physical Configuration

The relay has an industry-standard octal base (8-pin) with pin configuration per DIN 46255. It can be used with a variety of sockets (panel mount or DIN rail mount). The clear dust cover protects contacts while allowing visual inspection. Dimensions: approximately 52mm (H) x 35mm (W) x 55mm (D). Weight approx. 85g.

Accessories and Options

Compatible accessories include: surge suppressors (diode/RC), mechanical interlocks for opposing relays, and socket modules with built-in LEDs or timing functions. The 70C1185R53 can be used with standard 70-series sockets such as the 70C-8-PM or 70C-8-DIN.

Environmental Data

Operating temperature: -40°C to +55°C. Storage temperature: -55°C to +85°C. Vibration resistance: 10-55Hz, 0.5mm amplitude. Shock resistance: 10g. It is rated for pollution degree 2 and installation category III.

Applications

Common uses include motor starters (as auxiliary relays), HVAC controls, machine tool logic, conveyor systems, and lighting contactors. Its 4PDT configuration allows it to replace multiple smaller relays, simplifying panel wiring.