Songle Relay SRD-05VDC-SL-C

Product FAQ

• 1. What are the primary mechanical, electrical, and structural specifications of the SRD-05VDC-SL-C relay?
  The Songle SRD-05VDC-SL-C is a miniature PCB-mounted electromagnetic relay with a Single Pole Double Throw (SPDT / 1 Form C) contact configuration. It features a sealed plastic enclosure measuring approximately 19.2 × 15.6 × 15.8 mm and uses a 5-pin through-hole mounting footprint. The relay operates from a 5 VDC coil with a rated coil power of 0.36 W and provides 1500 VAC dielectric isolation between the coil and contacts (1 minute), making it suitable for applications requiring electrical isolation between the control and switching circuits.
• 2. What electrical characteristics should be considered when using the SRD-05VDC-SL-C?
  The SRD-05VDC-SL-C uses a 5 VDC coil with a rated power consumption of 0.36 W, corresponding to a nominal coil current of approximately 71.4 mA and a nominal coil resistance of 70 Ω. According to the datasheet, the pull-in voltage is 75% maximum of the rated voltage, the release voltage is 10% minimum of the rated voltage, and the maximum allowable coil voltage is 130% of the rated voltage. These electrical characteristics should be considered when designing the relay drive circuit.
• 3. What are the contact ratings of the SRD-05VDC-SL-C relay?
  The SRD series is available with 7 A, 10 A, and 15 A contact ratings depending on the model. The datasheet specifies switching ratings of 10 A at 250 VAC and 15 A at 250 VAC (NO contact) for applicable versions. The relay has a maximum switching voltage of 250 VAC, a maximum switching current of 15 A, and a maximum switching capacity of 3750 VA. Contact material options include AgCdO, AgSnO₂, and AgNi, depending on the product variant.
• 4. What are the timing, insulation, and environmental specifications of the SRD-05VDC-SL-C?
  The relay has an operate time of ≤10 ms and a release time of ≤10 ms under rated coil voltage. The insulation resistance is 100 MΩ minimum (500 VDC). Dielectric strength is rated at 1500 VAC for 1 minute between the coil and contacts and 1000 VAC for 1 minute between open contacts. The relay is available with an operating temperature range of −40°C to +85°C, with selected variants supporting up to +105°C. The sealed version is rated for operation in environments with up to 85% RH at 20°C.
• 5. What mounting and package information is provided for the SRD-05VDC-SL-C? A:
  The SRD-05VDC-SL-C is designed for PCB through-hole mounting using a standard 5-pin footprint consisting of two coil terminals and three switching terminals, matching its 1 Form C (SPDT) contact configuration. The relay is supplied in a sealed package, and the datasheet provides the recommended PCB footprint, mounting-hole layout, wiring diagram, and external dimensions to support PCB design and assembly.