WAGO 858-304 24VDC 4PDT DIN-Rail Relay Module

Technical Overview

24 VDC, 4PDT relay module with 5A continuous current, Push-in CAGE CLAMP® connections, IP20 protection.

Key Features

4 changeover contacts (4PDT) for flexible switching.
Nominal input voltage: 24 VDC.
Limiting continuous current: 5 A.
Push-in CAGE CLAMP® connection technology for quick conductor termination.
DIN-35 Rail mountable for standard cabinet integration.
Red LED status indicator for clear operational feedback.
Manual operation capability for testing and maintenance.
IP20 degree of protection for indoor industrial environments.
Wide operating temperature range of -25 °C to +70 °C.
High mechanical life of 20 x 10^6 switching operations ensures durability.

Technical Specification Matrix

Parameter	Value
Nominal Input Voltage U_N	24 VDC
Input Voltage Range	19.2-26.4 VDC
Rated Voltage (Insulation)	250 V
Rated Impulse Voltage	2.5 kV
Max. Switching Voltage	250 VAC
Limiting Continuous Current	5 A
Nominal Input Current at U_N	36.9 mA
Max. Make Current (Resistive, 4s)	15 A (AC)
AC-15 Rating	1A (240 Vac)
DC-13 Rating	2A (24 Vdc)
Recommended Minimum Load	12 V / 100 mA
Contact Configuration	4 changeover contacts (4PDT)
Contact Material	AgCe (Silver-Cerium)
Mounting Type	DIN-35 Rail
Strip Length	9-10 mm / 0.39 inches
Conductor Cross-section	0.34-1.5 mm² (22-16 AWG) solid/fine-stranded; 1 x 2.5 mm² (12 AWG); Push-in CAGE CLAMP® COMPACT for 0.5 mm² (20 AWG) and larger
Degree of Protection	IP20
Ambient Air Temperature (Operation)	-25 °C … +70 °C
Ambient Air Temperature (Storage)	-40 °C … +70 °C
Humidity	5-85% relative humidity (RH)
Electrical Life (N.O.; resistive load; 23 °C)	100 x 10^3 switching operations
Mechanical Life	20 x 10^6 switching operations
Status Indication	Red LED
Pull-in Time (typ.)	25 ms
Drop-out Time (typ.)	25 ms
Bounce Time (typ.)	4 ms
Physical Weight (kg)	0.1
Dimensions L x W x H (cm)	7.3 x 3.1 x 9.7

Industrial Applications

1. Industrial Machine Control

The WAGO 858-304 relay module is perfectly suited for controlling various functions within industrial machinery, acting as an interface between control logic and higher power loads.

Problem Solved

Provides reliable switching and isolation for motor starters, solenoids, or indicator lights in machine control panels, simplifying wiring with Push-in CAGE CLAMP® technology and fitting standard DIN-rail setups.

24 VDC Control4PDT Switching5A Continuous CurrentDIN-Rail MountingIP20 Protection

2. Building Automation Systems

This relay module can be effectively integrated into building automation systems for controlling diverse building functions such as lighting, HVAC, and security subsystems.

Problem Solved

Enables flexible control logic for switching circuits in commercial buildings, utilizing the standard 24VDC control voltage and 4 changeover contacts for managing different loads and signals within an IP20-rated indoor environment.

24 VDC ControlHVAC ControlLighting ControlSignal IsolationDIN-Rail

3. Process Control and Signalling

Ideal for signal isolation, interlocking, and alarm activation in process control environments where 24VDC logic is prevalent.

Problem Solved

Offers robust and reliable switching for process instrumentation and signalling, handling up to 5A continuous current and ensuring long-term operation with 20 million mechanical switching operations in a -25°C to +70°C ambient temperature range.

24 VDC LogicSignal IsolationInterlockingHigh Mechanical LifeWide Operating Temperature