Omron MY4I4 AC12 General Purpose Relay – Equivalent & Substitute Parts

Part Overview

The Omron MY4I4 AC12 is a general purpose relay featuring a 4PDT (4 Form C) contact configuration with a 12VAC coil. This relay is classified as obsolete, making identification of suitable substitute components essential for system maintenance, repair, and redesign applications. The MY4I4 AC12 operates as a non-latching relay suitable for industrial control and automation circuits requiring multiple independent switching paths.

Substiute Parts

MY4I4 AC12

Omron Automation and SafetyIn Stock: 664MY4I4 AC12 Datasheet

Current PartRFQ

MY4IN AC12 (S)

Omron Automation and SafetyIn Stock: 1141MY4IN AC12 (S) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MY4I4 AC12 is determined by the following critical parameters:

• Contact Configuration: 4PDT (4 Form C) – maintains four independent switching paths
• Coil Voltage: 12VAC – ensures compatibility with existing control circuits
• Relay Type: General Purpose – functional classification for industrial switching applications
• Coil Type: Non Latching – relay returns to de-energized state upon coil de-excitation
• Switching Voltage Rating: Maximum 250VAC and 220VDC – establishes load circuit compatibility limits

The MY4IN AC12 (S) qualifies as a direct substitute based on matching all critical parameters. Additional compatibility is established through the MY4IN AC12 (S) substitute chain, which includes KHAU-17A12B-12, KHAU-17A12-12, PT570512, and KHAU-17A11-12.

Parameter Comparison

Engineering Selection Recommendations

The MY4IN AC12 (S) is the primary substitute for the obsolete MY4I4 AC12. Both relays share identical contact configuration, coil voltage, and coil type specifications. The MY4IN AC12 (S) carries Active product status and is RoHS Compliant, providing long-term availability and regulatory alignment for new designs and system updates.

The MY4IN AC12 (S) introduces socketable mounting and plug-in termination, offering enhanced serviceability compared to the original MY4I4 AC12. The reduced maximum DC switching voltage (125VDC versus 220VDC) must be evaluated against specific load circuit requirements.

For applications requiring the original 220VDC switching capability, the extended substitute chain (KHAU-17A12B-12, KHAU-17A12-12, PT570512, KHAU-17A11-12) provides alternative sources within the Omron product ecosystem.

Frequently Asked Questions (FAQ)

Q: Can the MY4IN AC12 (S) directly replace the MY4I4 AC12 in existing circuits?

A: Yes, for circuits operating within 250VAC and 125VDC maximum switching voltages. The MY4IN AC12 (S) matches the critical parameters: 4PDT contact form, 12VAC coil voltage, and non-latching operation. Applications requiring 220VDC switching must be evaluated against the reduced DC rating.

Q: What is the difference between the MY4I4 AC12 and MY4IN AC12 (S)?

A: The MY4IN AC12 (S) is the active production equivalent. Key differences include socketable mounting (versus fixed mounting on the original), plug-in termination, and additional features such as lighted indicator and test button. The MY4IN AC12 (S) provides specified operating parameters: 91 mA coil current, 46 Ohms coil resistance, 20 ms operate and release times, and -55°C to 70°C operating temperature range.

Q: Are there other Omron relays compatible with the MY4I4 AC12?

A: The MY4IN AC12 (S) substitute list includes KHAU-17A12B-12, KHAU-17A12-12, PT570512, and KHAU-17A11-12. These alternatives maintain the 4PDT configuration and 12VAC coil specification within the Omron product family.

Q: What packaging is available for the MY4IN AC12 (S)?

A: The MY4IN AC12 (S) is supplied in Bulk packaging, with 1064 pieces currently in stock as new original inventory.

Q: Are both relays RoHS compliant?

A: The MY4IN AC12 (S) is RoHS Compliant. RoHS status for the obsolete MY4I4 AC12 is not specified in available documentation.