Relays
Control your project with confidence! We offer a vast selection of relays from leading manufacturers like Omron, TE Connectivity, and Panasonic. Find the perfect relay for your application, whether you need signal switching, power control, or anything in between. Solid state, electromechanical, and more – we have them all, conveniently located in one place. Stop relay racing and start building – everything’s here to bring your project to life!
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Frequently Asked Questions About About Relays
Our design calls for a relay but the specification doesn't define a type. What are the key differences between relay types, and how does that affect sourcing?
Relay type selection has real application consequences. Electromechanical relays use physical contacts that provide true galvanic isolation between the control circuit and the load, handle high inrush currents, and fail open when the coil is de-energized. They accumulate mechanical wear over switching cycles and are not suited to high-frequency switching. Solid-state relays use semiconductor switching with no moving parts, support high switching frequencies, and have no mechanical wear, but generate heat in operation and don't provide true galvanic isolation in all configurations. Reed relays serve low-level signal switching where low contact resistance and high sensitivity matter. Time delay relays add a defined interval to switch-on or switch-off, used in sequencing and motor control. ASC stocks all of these relay types from manufacturers, such as Omron, TE Connectivity, and Panasonic. If your specification is incomplete, providing the load type, current range, switching frequency, and isolation requirements with your RFQ will let ASC's team identify the appropriate relay type and part number.
The relay part number we need for a board repair is no longer available. What specifications does ASC need to source a valid substitute?
Coil voltage is the most critical parameter. A relay with the wrong coil voltage either won't energize reliably at the control circuit's supply voltage or will overheat the coil under continuous operation. Contact rating must also match the load: AC and DC ratings differ because DC arcing is harder to extinguish, and a resistive load rating doesn't apply to inductive loads like motors or solenoids, which generate higher inrush current at switch-on. Mounting format and contact arrangement both need to match the existing design, whether that's a PCB mount, DIN rail, or socket-style installation. ASC's sourcing team can work from your original part number to identify the full specification set and source a compliant substitute from current production. If the original part number is unavailable, providing the coil voltage and contact rating with your RFQ gives the team enough to begin.
We source relays for vehicle electrical systems and EV applications that require automotive-grade components. What can ASC supply?
Automotive relays are built to specifications that commercial equivalents don't meet, including wider operating temperature ranges, vibration and shock resistance, and in some formats compliance with ISO automotive relay standards for vehicle fuse and relay box applications. ASC sources automotive relay products, including ISO-format relays for vehicle power distribution as well as higher-current variants used in EV battery management and charging circuits. Song Chuan automotive relays are available through ASC's sourcing network, and Omron and TE Connectivity both manufacture automotive relay lines that ASC can source. Confirming the grade explicitly matters because commercial-grade parts are sometimes supplied in automotive-format packaging. ASC's sourcing process verifies parts against specification before shipment. Include your load current, coil voltage, and operating environment in your RFQ.
We use safety relays in machine-guarding and emergency-stop circuits that must comply with functional safety standards. What does ASC need to source the right part, and what documentation can it provide?
Safety relays are a purpose-built category with design features such as dual-channel monitoring, forced-guided contacts, and contact-state self-monitoring, which enable their incorporation into circuits that must detect and respond to relay failure. The safety performance level an application requires (defined by standards such as IEC 62061 and EN ISO 13849) determines which safety relay series is appropriate. That determination belongs to your safety engineering process. Communicating the required relay series or certification on your RFQ allows ASC's sourcing team to confirm that the part being sourced carries the necessary manufacturer certifications. Safety Relays are a confirmed product category within ASC's relay catalog. ASC holds AS 9120:2016 and ISO 9001:2015 certifications and can provide certificates of conformance and full traceability documentation for safety relay orders.
The power relays on our BOM require specific sockets for DIN rail installation. Can ASC source relay sockets and mounting hardware alongside the relays themselves?
Yes. Relay Sockets & Hardware is a confirmed product category within ASC's relay catalog. Relay sockets are manufacturer- and series-specific, and a socket that doesn't match the relay's pin configuration or contact-loading specification creates an installation problem that surfaces at assembly rather than at incoming inspection. For power relays on DIN rail, the socket also determines the mounting footprint and terminal connection method. Sourcing relay sockets through the same engagement as the relays avoids the risk of mismatch and reduces the need for separate procurement transactions. Include your relay part numbers with your RFQ, and ASC's team can identify the corresponding socket and mounting hardware requirements.
We're sourcing relays for an aerospace assembly with specific environmental screening and documentation requirements. How does ASC approach aerospace relay procurement?
Aerospace Relays is a distinct product category within ASC's relay catalog. Relays specified for aerospace use are selected for operation in wide temperature ranges, vibration and shock resistance, and in hermetically sealed configurations where moisture or contamination would degrade contact reliability over time. The part specification needs to capture the environmental qualification class, not just the electrical parameters. Certificates of conformance and full lot traceability are standard requirements for components going into aerospace programs, and ASC provides both under its AS 9120:2016 and AS 6081:2012 certifications. For orders requiring screening beyond standard incoming inspection, ASC's third-party lab network holds certifications to MIL-STD-750, MIL-STD-883, NAS 410 Level 3, and IDEA-ICE-3000. Include your relay specification, environmental qualification class, and documentation requirements with your RFQ.