## Detailed Specifications: DSP1A-DC12V-R The **DSP1A-DC12V-R** is a high-performance, miniature power relay manufactured by **Panasonic**. It is widely used in industrial equipment, office automation, and consumer electronics due to its high switching capacity and compact size. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Contact Form** | 1 Form A (SPST-NO) | | **Coil Voltage** | 12V DC | | **Contact Rating (Resistive)** | 8A 250V AC / 5A 30W DC | | **Maximum Switching Voltage** | 250V AC / 30V DC | | **Nominal Operating Power** | 300 mW | | **Coil Resistance** | 480 Ω (±10%) | | **Terminal Type** | Through Hole (PCB Mount) | | **Operating Temperature** | -40°C to +60°C | --- ### 2. Breakdown of the Model Number Understanding the nomenclature helps in identifying specific features: * **DSP**: Series name (High-sensitivity, 1-pole/2-pole power relay). * **1A**: Contact arrangement (1 Form A - Single Pole Single Throw, Normally Open). * **DC12V**: Nominal coil voltage required to activate the relay. * **R**: Reversed terminal polarity/Special wiring (Note: Always check the specific datasheet for "R" variants as they sometimes denote reverse pinouts or RoHS compliant packaging depending on the production year). --- ### 3. Core Features * **High Sensitivity:** With a nominal operating power of only 300mW, it can be driven by relatively low-power circuits. * **Compact Footprint:** Designed for high-density PCB mounting, saving space in control panels. * **High Breakdown Voltage:** Offers excellent insulation between the coil and contacts (Surge breakdown voltage: 5,000V). * **Sealed Construction:** Typically features a protective construction that allows for automatic soldering and cleaning. --- ### 4. Typical Applications 1. **Industrial Controls:** PLCs (Programmable Logic Controllers), timers, and temperature controllers. 2. **Office Equipment:** Photocopiers, printers, and scanners. 3. **Household Appliances:** Air conditioners, microwave ovens, and washing machines. 4. **Power Supplies:** Used as a power switch in various UPS and adapter units. --- ### 5. Wiring Diagram (Simplified) ```text [Coil Side] [Contact Side] (Pin 1) (Pin 3) | | [====] (Electromagnet) | / (Switch) | | / (Pin 2) (Pin 4) ```