WAGO 788-304 Power Relay Module SPDT 24VDC 16A

Technical Overview

24VDC coil SPDT relay module with 16A continuous current, 250VAC switching, and IP20 protection.

Key Features

SPDT (1 Changeover Contact) configuration.
24V DC coil voltage with ±10% tolerance.
16A continuous current rating.
Red LED status indicator.
IP20 degree of protection.
DIN-35 rail mounting.
Push-in CAGE CLAMP® connection technology.
Operating ambient temperature range of -40°C to +70°C.
Reinforced insulation between coil and contacts.

Technical Specification Matrix

Parameter	Value
Nominal Input Voltage	24 VDC ±10%
Control Voltage Range (DC)	21.6-26.4 VDC
Rated Voltage	250 V
Rated Impulse Voltage (Uimp)	4 kV
Maximum Switching Voltage	250 VAC
Dielectric Strength (Control/Load Circuit)	5 kVrms (AC, 1 min)
Contact Configuration	SPDT (1 Changeover Contact)
Contact Material	Silver Nickel (AgNi 90/10)
Limiting Continuous Current	16 A
Nominal Input Current	19.1 mA
Maximum Inrush Current (Resistive)	30 A (AC) for 4s
Maximum Switching Power	4000 VA
Switching Capacity (AC-15)	6 A / 250 VAC
Switching Capacity (DC-13)	2 A / 24 VDC
Recommended Minimum Load	12 V / 10 mA
Pull-in Time (typ.)	8 ms
Drop-out Time (typ.)	6 ms
Bounce Time (typ.)	6 ms
Electrical Life (NO; resistive load; 23 °C)	30 x 10³ switching operations
Mechanical Life	30 x 10⁶ switching operations
Status Indicator	Red LED
Mounting Type	DIN-35 rail
Protection Type	IP20
Connection Technology	Push-in CAGE CLAMP®
Solid Conductor Size	0.34 – 2.5 mm² / 22 – 14 AWG
Fine-Stranded Conductor Size	0.34 – 2.5 mm² / 22 – 14 AWG
Strip Length	9 – 10 mm
Operating Ambient Temperature	-40 °C to +70 °C
Pollution Degree	3
Physical Weight (kg)	0.05
Dimensions L x W x H (cm)	5.4 x 1.5 x 8.6

Industrial Applications

1. PLC Output Interfacing in Industrial Control Panels

This relay module acts as an interface between low-power 24VDC PLC digital outputs and higher-power industrial loads such as contactors, solenoid valves, or small motors, leveraging its 24VDC coil voltage.

Problem Solved

Protects sensitive PLC outputs from inductive load kickback and allows the PLC to switch higher currents (up to 16A continuous) or different voltage types (250VAC) than its native outputs can handle, with reinforced insulation ensuring reliable isolation.

PLC interfaceindustrial controlinductive load protectiongalvanic isolation24VDC16A250VAC

2. Signal Amplification and Level Shifting in Building Automation

In building automation systems, the WAGO 788-304 can receive a 24VDC control signal and activate its 16A/250VAC contacts to switch higher voltage loads like lighting circuits or fans.

Problem Solved

Enables low-voltage control systems (e.g., DDC controllers) to safely and reliably switch higher voltage/current loads found in HVAC, lighting, and access control systems without direct exposure to high power.

Signal amplificationlevel shiftingbuilding automationHVAC controllighting control24VDC control250VAC switching

3. Motor Control Circuitry for Small Machinery

Integrated within motor starter circuits for small industrial machines, this relay controls fractional horsepower motors or manages auxiliary functions, utilizing its 16A continuous current and 30A inrush capability.

Problem Solved

Provides robust and reliable switching for motor control with a high mechanical life for frequent operations, and its DIN-rail mounting simplifies integration into control cabinets, while the IP20 rating suits protected indoor environments.

Motor controlauxiliary circuitssmall machinery16A continuous30A inrushDIN-railIP20