Description
Product Overview
The SRD-24VDC-SL-A is a high-quality, subminiature electromagnetic relay manufactured by Songle Relay (Ningbo Songle Relay Co., Ltd.), one of the most trusted names in the relay industry . This 4-pin, 1 Form A (SPST-NO) relay is designed to switch loads up to 10A at 250V AC or 30V DC, making it an ideal choice for a wide range of applications including industrial control systems, automation equipment, power supplies, and household appliances .
With a 24V DC coil, this relay is perfectly suited for industrial control panels, PLC systems, HVAC equipment, and various 24V applications common in factory automation . The relay features a sealed construction that protects the internal contacts from dust, humidity, and environmental contaminants, ensuring long-term reliability even in demanding conditions . It is recognized by major safety agencies, providing confidence for both hobbyist and commercial applications.
The SRD series relay employs a simple magnetic circuit design that enables high-density PCB mounting while maintaining a compact footprint. Its SPST-NO (Single Pole Single Throw, Normally Open) configuration provides straightforward ON/OFF control, making it ideal for applications where the load should be OFF by default and turned ON when the relay is activated .
Key Features
-
SPST-NO Contact Configuration (1 Form A): Single Pole Single Throw, Normally Open contact configuration with 4 pins—simple and reliable ON/OFF control
-
10A High Switching Capacity: Contacts rated for 10A at 250V AC or 10A at 30V DC, with maximum switching current up to 15A, suitable for controlling motors, solenoids, lighting, and industrial equipment
-
24V DC Coil Voltage: Standard industrial operating voltage with a coil resistance of approximately 1.6kΩ (1600Ω) and low power consumption of 360mW (0.36W)
-
Compact Subminiature Design: Small footprint measuring approximately 19.2mm × 15.6mm × 15.8mm, ideal for high-density PCB mounting and space-constrained applications
-
Sealed Construction: Fully sealed design protects internal contacts from dust, moisture, and environmental contaminants for enhanced reliability in harsh environments
-
Fast Switching Time: Typical operate and release time of ≤10ms, suitable for most control applications
-
Wide Operating Temperature: Rated for operation from -40°C to +85°C, suitable for demanding industrial environments and outdoor installations
-
High Insulation Resistance: Insulation resistance of 100MΩ minimum at 500VDC, with dielectric strength of 1500VAC between coil and contacts for safety
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Coil Voltage (Nominal) | 24 VDC |
| Coil Resistance | 1.6 kΩ (1600Ω) ± 10% |
| Coil Power Consumption | 360 mW (0.36 W) |
| Coil Current | 15 mA |
| Contact Configuration | 1 Form A (SPST-NO) |
| Number of Pins | 4 |
| Contact Rating (Resistive) | 10A @ 250V AC / 10A @ 30V DC |
| Maximum Switching Current | 15A |
| Maximum Switching Voltage | 250V AC / 110V DC |
| Pick-Up Voltage (Pull-In) | ≤ 75% of nominal voltage (≤ 18V) |
| Drop-Out Voltage (Release) | ≥ 10% of nominal voltage (≥ 2.4V) |
| Operate Time | ≤ 10 ms |
| Release Time | ≤ 10 ms |
| Contact Resistance | ≤ 100 mΩ (initial) |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Dielectric Strength (Coil to Contacts) | 1500 VAC for 1 minute |
| Mechanical Life | 10,000,000 operations |
| Electrical Life | 100,000 operations at rated load |
| Operating Temperature | -40°C to +85°C |
| Dimensions (L × W × H) | 19.2mm × 15.6mm × 15.8mm |
| Weight | Approx. 9g |
Reviews
There are no reviews yet.