ALDP112
SPST-NO power relay, 12V DC coil, 10A switching, ALDP series, PCB mounting, AgSnO2 contacts.
Product Overview
Description
The ALDP112 is a compact PCB power relay from Panasonic's ALDP series, designed for switching loads up to 10A in industrial and consumer applications. This SPST-NO (Single Pole Single Throw, Normally Open) relay features a 12V DC coil and AgSnO2 contacts for reliable switching of resistive and inductive loads.
Featuring Panasonic's high-quality contact materials and robust construction, this relay provides excellent electrical life and reliable operation. The compact PCB mounting package saves space while maintaining high switching capacity.
The 12V DC coil is compatible with standard control systems and industrial PLCs. This relay is suitable for motor control, HVAC systems, lighting control, and industrial automation applications.
Product Series
ALDP
Primary Application
Industrial control systems
Key Features
- Compact PCB mounting package
- High switching capacity 10A/250V AC
- AgSnO2 contacts for inductive loads
- High sensitivity 400mW coil
- RoHS compliant
- UL recognized
Specifications
| Contact Configuration | SPST-NO (1 Form A) |
|---|---|
| Switching Current | 10A at 250V AC (resistive) |
| Coil Voltage | 12V DC |
| Coil Resistance | 360 ohm |
| Coil Power | 400mW |
| Contact Material | AgSnO2 |
| Electrical Life | 100,000 operations at rated load |
| Mechanical Life | 10,000,000 operations |
| Operating Temperature | -40C to +85C |
| Dimensions | 15.5mm x 10.5mm x 12.5mm |
Applications
Industrial control systems
Industrial automation and control
HVAC equipment
Electronic system design
Lighting control
Industrial automation and control
Motor control
Motor drive and control systems
Power distribution
Electronic system design
FAE Expert Insights
"The ALDP112 is one of my go-to recommendations for general-purpose power switching in industrial controls. The compact 15.5x10.5mm footprint fits well in dense PCB layouts while providing 10A switching capability. The AgSnO2 contact material handles inductive loads much better than standard silver contacts - I've seen significantly fewer welding issues with this material. The 400mW coil power is efficient and easy to drive from standard logic or PLC outputs. I typically recommend adding a flyback diode across the coil to protect the driving circuit. For motor loads, I suggest derating to 5-7A to extend contact life. Overall, this is a reliable, cost-effective relay for industrial applications."
Compact and reliable power relay with excellent inductive load handling
— Robert Taylor, BeiLuo
Frequently Asked Questions
What is the inrush current capability of this relay?
The ALDP112 can handle inrush currents significantly higher than its continuous rating. For resistive loads, it can switch up to 10A continuously. For inductive loads like motors and solenoids, the inrush current can be 5-10x the running current. The AgSnO2 contact material is specifically chosen for its ability to handle these inrush currents without welding. However, for high inrush applications (like tungsten lamp loads or large capacitor banks), consider using a relay with higher contact rating or implementing soft-start circuits. The relay can typically handle 30A inrush for a few milliseconds. Always verify actual inrush currents in your application and select appropriate protection.
For high inrush loads, consider higher rated relays or soft-start circuits.
How do I protect the relay coil in my circuit?
Relay coils are inductive loads that generate a high voltage spike (back EMF) when de-energized. This spike can damage driving transistors or microcontrollers. Always include a flyback protection diode across the coil for DC relays. Connect the diode cathode to the positive coil terminal and anode to the negative terminal. A standard 1N4007 or similar rectifier diode is suitable for most applications. For faster relay release times, consider using a zener diode in series with the flyback diode, or a TVS diode. The ALDP112's 360 ohm coil draws approximately 33mA at 12V, so ensure your driving circuit can supply this current continuously.
Always use flyback diode protection for DC relay coils to prevent voltage spikes.