RY4V-UDC12V Equivalent & Substitute Parts

Part Overview

The RY4V-UDC12V is a 4PDT general purpose relay manufactured by IDEC with a 12VDC coil, designed for socketable mounting applications. This relay features 5A contact rating and operates across a temperature range of -25°C to 55°C. The product is currently classified as obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications where continued availability is required.

Substiute Parts

RY4V-UDC12V

IDECIn Stock: 829RY4V-UDC12V Datasheet

Current PartRFQ

RH4B-UDC12V

IDECIn Stock: 949RH4B-UDC12V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RY4V-UDC12V is determined by the following critical parameters:

Mandatory Matching Parameters:

• Contact form: 4PDT (4 Form C)
• Coil voltage: 12VDC
• Mounting type: Socketable
• Coil type: Non Latching
• Termination style: Plug In compatible

Allowable Parameter Variations:

• Contact rating current may be equal to or greater than 5A
• Switching voltage may be equal to or greater than the original specification
• Coil current may differ within acceptable control circuit limits
• Operating temperature range may be equal to or extended
• Operate and release times may vary within application timing tolerances

The RH4B-UDC12V qualifies as a direct substitute based on these criteria, maintaining all mandatory parameters while providing enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The RH4B-UDC12V is the manufacturer-recommended substitute for the obsolete RY4V-UDC12V. This substitution is supported by:

• Active product status with current manufacturing and availability
• ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements
• Identical coil voltage, contact form, and mounting architecture
• Enhanced contact rating (10A versus 5A) providing increased current capacity
• Extended operating temperature range (-25°C to 70°C versus -25°C to 55°C)
• Backward compatible termination with additional quick connect option

The RH4B-UDC12V maintains functional equivalence for applications designed around the RY4V-UDC12V specifications while providing improved performance margins and regulatory compliance for new designs and system updates.

Frequently Asked Questions (FAQ)

Q: Can the RH4B-UDC12V directly replace the RY4V-UDC12V in existing circuits?

A: Yes. Both relays share identical coil voltage (12VDC), contact form (4PDT), mounting type (socketable), and termination style (plug in). The RH4B-UDC12V maintains the same must-operate and must-release voltage thresholds, ensuring compatible control circuit operation.

Q: What are the key differences between these two relays?

A: The RH4B-UDC12V provides higher contact current rating (10A versus 5A), extended operating temperature range (to 70°C versus 55°C), and active product status. Operate and release times are slightly longer (25ms versus 20ms). The RH4B-UDC12V also offers quick connect termination as an additional option.

Q: Are there packaging considerations for this substitution?

A: The RY4V-UDC12V is packaged in standard format, while the RH4B-UDC12V is available in bulk packaging. Both use identical socketable mounting, so physical installation remains unchanged. Verify socket compatibility with your specific relay base or socket assembly.

Q: Does the higher coil current of the RH4B-UDC12V (125mA versus 75mA) affect circuit design?

A: The increased coil current must be accommodated by the control circuit power supply and drive circuitry. Verify that the coil drive circuit can supply 125mA at 12VDC without exceeding voltage regulation limits or causing unintended voltage drops in other circuit branches.

Q: What compliance certifications apply to the RH4B-UDC12V?

A: The RH4B-UDC12V is ROHS3 compliant and REACH unaffected. These certifications confirm compliance with current environmental and hazardous substance regulations applicable to electronic components.