Description
⚡ 24V SugarCube 5-Pin Relay Module – Industrial-Grade Power Switching Solution
The 24V SugarCube 5-Pin Relay is a robust, industrial-grade electromechanical relay module designed for switching high-power AC/DC loads using 24V control signals. With its miniature “sugar cube” form factor and 5-pin configuration, this relay is perfect for industrial automation, PLC systems, building automation, and heavy-duty control applications. Capable of switching up to 10A at 250VAC or 30VDC, this relay provides reliable electrical isolation and is the industry standard for 24V control systems worldwide.
✨ Key Highlights
- ⚡ 24V Coil Voltage – Industrial standard for automation and PLC systems
- 🔌 10A Switching Capacity – Handle heavy-duty loads and industrial equipment
- 🏭 Industrial Grade – Built for harsh environments and 24/7 operation
- 🔒 Electrical Isolation – Safe separation between control and load circuits
- 📐 Compact SugarCube Design – Space-saving miniature form factor
- 🔄 SPDT Configuration – Single Pole Double Throw (NO + NC contacts)
- 💡 Low Power Coil – Minimal current draw (~18mA)
- 🔧 5-Pin Terminal – Easy PCB mounting and DIN rail installation
- ⚙️ Extended Lifespan – 100,000+ mechanical operations
- 🌐 PLC Compatible – Direct interface with industrial controllers
📊 Technical Specifications
| Specification |
Details |
| ⚡ Coil Voltage |
24V DC (Nominal) |
| 🔋 Coil Voltage Range |
18V – 28.8V DC (Operating range, ±20%) |
| 💡 Coil Current |
~18mA (typical at 24V) |
| ⚙️ Coil Resistance |
~1330Ω (±10%) |
| ⚡ Coil Power |
~430mW |
| 🔌 Contact Configuration |
SPDT (Single Pole Double Throw) |
| ⚡ Maximum Switching Voltage (AC) |
250VAC |
| 🔋 Maximum Switching Voltage (DC) |
30VDC |
| 💪 Maximum Switching Current |
10A (Resistive Load) |
| 🔌 Contact Rating |
10A @ 250VAC / 10A @ 30VDC |
| ⚙️ Contact Material |
Silver Alloy (AgNi or AgCdO) |
| 🔒 Contact Resistance |
≤100mΩ (initial) |
| ⏱️ Operating Time |
≤10ms (pickup), ≤5ms (release) |
| 🔄 Mechanical Life |
10,000,000 operations (no load) |
| ⚡ Electrical Life |
100,000 operations (rated load) |
| 🛡️ Insulation Resistance |
≥100MΩ (at 500VDC) |
| ⚡ Dielectric Strength |
1500VAC (1 minute between coil and contacts) |
| 🌡️ Operating Temperature |
-40°C to +85°C |
| 💧 Humidity |
5% to 85% RH (non-condensing) |
| 📏 Dimensions |
~19.5mm x 15.5mm x 15.5mm (LxWxH) |
| 📌 Pin Pitch |
5.0mm (standard PCB spacing) |
| ⚖️ Weight |
~8g |
🔌 5-Pin Configuration
| Pin Number |
Pin Name |
Function |
| 1 |
Coil (+) |
Positive coil terminal (Connect to +24V via driver/PLC output) |
| 2 |
Coil (-) |
Negative coil terminal (Connect to GND/Common) |
| 3 |
COM |
Common contact (Moving contact, connects to load) |
| 4 |
NO |
Normally Open contact (Closed when relay energized) |
| 5 |
NC |
Normally Closed contact (Open when relay energized) |
🔄 SPDT Contact States
🎯 Perfect For
| Application |
Description |
| 🏭 Industrial Automation |
PLC outputs, control panels, machine control |
| 🏢 Building Automation |
HVAC control, lighting systems, access control |
| ⚙️ Process Control |
Pumps, valves, conveyors, actuators |
| 🔋 Power Distribution |
Load switching, power management, backup systems |
| 🌡️ HVAC Systems |
Compressor control, fan motors, damper actuators |
| 💧 Water Treatment |
Pump control, valve automation, flow control |
| 🚨 Fire & Safety |
Alarm systems, emergency shutoff, sprinkler control |
| 🏗️ Construction Equipment |
Crane controls, lifting equipment, hydraulic systems |
| 🌞 Solar/Wind Systems |
24V battery banks, charge controllers, inverter control |
| 🚂 Railway Systems |
Signaling, track switches, station equipment |
| 📡 Telecom Equipment |
Battery backup systems, power distribution |
| 🔬 Laboratory Equipment |
Instrumentation, test equipment, sample handling |
🔧 Driving 24V Relay with Different Control Voltages
| Control Voltage |
Solution |
Components Needed |
| 24V Direct (PLC/Industrial) |
Direct connection or transistor |
Optional: TIP120 Darlington or MOSFET + 1N4007 diode |
| 12V Control |
24V power supply + MOSFET |
IRLZ44N, 10kΩ resistor, 1N4007 diode, separate 24V PSU |
| 5V (Arduino/ESP32) |
Logic-level MOSFET + 24V supply |
IRLZ44N MOSFET, 10kΩ resistor, 1N4007 diode, 24V PSU |
| 3.3V (ESP8266/ESP32) |
MOSFET driver + 24V supply |
Logic-level MOSFET or relay module with 3.3V input |
| PLC Output (NPN/PNP) |
Direct connection |
Match PLC output type (sinking/sourcing) |
| Easiest Method |
24V Relay Module Board |
Pre-built module with optocoupler isolation |
⚡ MOSFET Driver Circuit (5V/3.3V MCU with 24V Supply)
| Connection |
Details |
| MCU GPIO (5V/3.3V) |
→ 10kΩ Resistor → MOSFET Gate (IRLZ44N) |
| MOSFET Source |
→ GND (Common ground with MCU and 24V PSU) |
| MOSFET Drain |
→ Relay Coil Pin 2 (Coil -) |
| Relay Coil Pin 1 (Coil +) |
→ +24V Power Supply (Industrial PSU or battery) |
| Flyback Diode (1N4007) |
Cathode → +24V, Anode → Coil Pin 2 (parallel to coil) |
| Gate Pull-down |
10kΩ resistor between Gate and GND (prevents floating) |
| Common Ground |
⚠️ CRITICAL: MCU GND, 24V PSU GND, MOSFET Source must connect |
🏭 PLC Connection Methods
| PLC Output Type |
Connection Method |
Wiring |
| NPN (Sinking) |
PLC switches coil negative |
Coil (+) → +24V, Coil (-) → PLC Output, PLC COM → GND |
| PNP (Sourcing) |
PLC switches coil positive |
Coil (+) → PLC Output, Coil (-) → GND, PLC COM → +24V |
| Relay Output |
PLC relay switches 24V |
Use PLC relay to control external 24V supply to coil |
| 0-10V Analog |
Not recommended |
Use intermediate relay module with analog input |
🆚 24V vs 12V vs 5V Relay Comparison
| Feature |
24V Relay |
12V Relay |
5V Relay |
| Coil Current |
~18mA (Lowest) |
