Omron MK2P-I-AC120 Equivalent & Substitute Parts

Part Overview

The Omron MK2P-I-AC120 is a general purpose relay with DPDT (2 Form C) contact configuration, rated for 10A at 120VAC coil voltage. This socketable, 8-pin octal relay features a mechanical indicator and is designed for standard industrial switching applications. The MK2P-I-AC120 is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Substiute Parts

MK2P-I-AC120

Omron Automation and SafetyIn Stock: 990MK2P-I-AC120 Datasheet

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KRPA-11AG-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 1446KRPA-11AG-120 Datasheet

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KRPA-11AGP-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 958KRPA-11AGP-120 Datasheet

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KRPA-11AN-120

TE Connectivity Potter & Brumfield RelaysIn Stock: 1428KRPA-11AN-120 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MK2P-I-AC120 are qualified based on the following critical parameters that must match or exceed the main part specifications:

Mandatory Matching Parameters:

• Coil Voltage: 120VAC
• Contact Form: DPDT (2 Form C)
• Contact Rating (Current): 10 A minimum
• Mounting Type: Socketable
• Termination Style: Plug In, 8 Pin (Octal)

Allowable Variations:

• Switching Voltage: Substitute parts may have lower maximum ratings (240VAC vs. 250VAC) while remaining functionally compatible
• Coil Current: Substitute parts with lower coil current (17.5 mA vs. 18 mA) are acceptable
• Operating Temperature Range: Substitute parts with wider temperature ranges (-45°C ~ 55°C vs. -10°C ~ 40°C) provide enhanced capability
• Contact Material: Silver Cadmium Oxide (AgCdO) substitutes for Silver (Ag) in general purpose applications
• Coil Resistance: Variations within the specified coil voltage class are acceptable

The three TE Connectivity Potter & Brumfield KRPA series relays meet all mandatory parameters and are direct functional equivalents to the MK2P-I-AC120.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: KRPA-11AG-120 or KRPA-11AN-120

Both KRPA-11AG-120 and KRPA-11AN-120 are active products from TE Connectivity Potter & Brumfield and provide the most direct path for replacing the obsolete MK2P-I-AC120. These parts meet all mandatory electrical and mechanical parameters. The KRPA-11AN-120 includes a lighted indicator feature, while the KRPA-11AG-120 provides a standard configuration. Both are ROHS3 compliant and offer extended operating temperature ranges.

Secondary Option: KRPA-11AGP-120

The KRPA-11AGP-120 is functionally equivalent but carries obsolete product status, similar to the MK2P-I-AC120. This part should be selected only when inventory availability of active alternatives is constrained or when legacy system documentation specifically references this part number.

Compliance Considerations:

All three TE Connectivity substitutes are ROHS3 compliant, providing regulatory advantage over the original Omron part. The KRPA series relays feature Class B coil insulation and are rated for wider operating temperature ranges, supporting deployment in more demanding environmental conditions than the original specification.

Frequently Asked Questions (FAQ)

Q: Can KRPA-11AG-120 directly replace MK2P-I-AC120 in existing sockets?

A: Yes. Both parts use identical 8-pin octal socketable termination and mounting configuration. Physical and electrical compatibility is confirmed across all mandatory parameters.

Q: What is the difference between KRPA-11AG-120 and KRPA-11AN-120?

A: The KRPA-11AN-120 includes a lighted indicator feature, while the KRPA-11AG-120 does not. All other electrical and mechanical specifications are identical. Selection depends on whether indicator functionality is required in the application.

Q: Why do the KRPA substitutes have lower maximum switching voltage (240VAC vs. 250VAC)?

A: The 10A contact rating remains unchanged. The lower maximum switching voltage specification does not affect compatibility in standard 120VAC coil applications. Verify application requirements do not exceed 240VAC switching conditions.

Q: Are the KRPA relays suitable for the same temperature range as the MK2P-I-AC120?

A: The KRPA series operates across -45°C ~ 55°C, which exceeds the MK2P-I-AC120 range of -10°C ~ 40°C. KRPA relays are suitable for the original specification and support extended temperature applications.

Q: What is the significance of the contact material difference (Silver vs. Silver Cadmium Oxide)?

A: Silver Cadmium Oxide (AgCdO) provides enhanced arc suppression and contact life in general purpose switching applications. This material substitution is standard in modern relay designs and is functionally compatible with Silver contact specifications.

Q: Should I select an active product status part over an obsolete part?

A: Yes. KRPA-11AG-120 and KRPA-11AN-120 are active products with ongoing manufacturing and supply chain support. These are preferred for new designs and long-term system maintenance. KRPA-11AGP-120 should be reserved for legacy system requirements only.