RU4S-C-D12 Equivalent & Substitute Parts

Part Overview

The RU4S-C-D12 is a general purpose relay manufactured by IDEC, featuring a 4PDT (4 Form C) contact configuration with a 12VDC coil. This socketable plug-in relay is designed for applications requiring switching of multiple independent circuits with a single coil energization. The part is currently active in production with 661 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this relay category.

Substiute Parts

RU4S-C-D12

IDECIn Stock: 738RU4S-C-D12 Datasheet

Current PartRFQ

KHAU-17D12-12

TE Connectivity Potter & Brumfield RelaysIn Stock: 1424KHAU-17D12-12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The KHAU-17D12-12 is identified as a substitute for the RU4S-C-D12 based on the following matching parameters:

• Coil Voltage: Both parts operate at 12VDC
• Contact Form: Both provide 4PDT (4 Form C) configuration
• Mounting Type: Both are socketable relays
• Termination Style: Both use plug-in termination
• Coil Type: Both are non-latching
• Coil Resistance: Both have 160 Ohms coil resistance

The KHAU-17D12-12 operates within compatible electrical and mechanical specifications for general purpose relay applications requiring 12VDC coil energization and 4PDT switching capability.

Parameter Comparison

Engineering Selection Recommendations

Both the RU4S-C-D12 and KHAU-17D12-12 are active production relays suitable for general purpose 12VDC switching applications. Selection between these parts should be based on the following considerations:

RU4S-C-D12 (IDEC) is appropriate when:

• Higher contact current rating (6 A) is required
• Extended low-temperature operation to -55°C is necessary
• Higher switching voltage capability (250VAC, 30VDC) is specified
• Contact material composition (Silver/Gold) is a requirement

KHAU-17D12-12 (TE Connectivity) is appropriate when:

• Contact current requirement is 5 A or lower
• Extended high-temperature operation to 70°C is beneficial
• Faster switching response times (13 ms operate, 6 ms release) are advantageous
• RoHS compliance status is not a constraint

Both parts share identical coil voltage, contact form, coil resistance, and socketable mounting characteristics, making them functionally interchangeable within their respective electrical parameter limits.

Frequently Asked Questions (FAQ)

Q: What determines if KHAU-17D12-12 can replace RU4S-C-D12?

A: Substitution is valid when the application circuit current does not exceed 5 A (the lower rating of the substitute), the switching voltage remains within 240VAC maximum, and the operating temperature range falls within -45°C to 70°C. Both relays provide identical 4PDT contact configuration and 12VDC coil operation.

Q: Are there differences in switching speed between these relays?

A: Yes. The RU4S-C-D12 has 20 ms operate and release times, while the KHAU-17D12-12 operates in 13 ms and releases in 6 ms. Applications with timing-critical switching requirements should account for these differences.

Q: What is the significance of the contact material difference?

A: The RU4S-C-D12 uses Silver and Gold contact materials, while the KHAU-17D12-12 uses Silver Cadmium Oxide. Contact material selection affects arc suppression, contact wear, and switching characteristics. Applications involving inductive loads or high-frequency switching may show performance differences.

Q: Can KHAU-17D12-12 be used in applications requiring -55°C operation?

A: No. The KHAU-17D12-12 operating temperature range is -45°C to 70°C. For applications requiring operation below -45°C, the RU4S-C-D12 with its -55°C to 60°C range is required.

Q: Are both relays compatible with the same socket?

A: Both relays use socketable plug-in termination and are designed for general purpose relay bases. However, verify socket compatibility with your specific application, as pin configuration details are not provided in the specification data.

Q: What is the RoHS compliance status for these parts?

A: The KHAU-17D12-12 is marked as RoHS non-compliant. RoHS compliance status for the RU4S-C-D12 is not specified in the provided data. Verify compliance requirements with your procurement or design specifications.