Equivalent & Substitute Parts for MK2P-S-AC120

Part Overview

The Omron MK2P-S-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 mechanical indicator and test button functionality. The product is currently obsolete, making equivalent substitute parts necessary for ongoing maintenance and new designs requiring compatible relay solutions.

Key Parameters

Parameter	Value
Coil Voltage	120VAC
Contact Form	DPDT (2 Form C)
Contact Rating (Current)	10 A
Mounting Type	Socketable
Termination Style	Plug In, 8 Pin (Octal)
Coil Type	Non Latching
Relay Type	General Purpose

Substitute Part Grouping Explanation

Substitution for the MK2P-S-AC120 is determined by strict equivalence across the following critical parameters:

Coil voltage: 120VAC
Contact configuration: DPDT (2 Form C)
Contact current rating: 10A minimum
Mounting type: Socketable
Termination: 8-pin octal plug-in
Coil type: Non-latching

The three TE Connectivity Potter & Brumfield KRPA series relays (KRPA-11AG-120, KRPA-11AGP-120, KRPA-11AN-120) meet all substitution criteria. These parts maintain identical coil voltage, contact form, current rating, mounting configuration, and termination style. Variations in contact material (Silver Cadmium Oxide vs. Silver), coil insulation class, and operating temperature range do not prevent functional substitution within the specified electrical parameters.

Parameter Comparison

Parameter	MK2P-S-AC120	KRPA-11AG-120	KRPA-11AGP-120	KRPA-11AN-120
Manufacturer	Omron Automation and Safety	TE Connectivity Potter & Brumfield Relays	TE Connectivity Potter & Brumfield Relays	TE Connectivity Potter & Brumfield Relays
Coil Voltage	120VAC	120VAC	120VAC	120VAC
Contact Form	DPDT (2 Form C)	DPDT (2 Form C)	DPDT (2 Form C)	DPDT (2 Form C)
Contact Rating (Current)	10 A	10 A	10 A	10 A
Switching Voltage (Max)	250VAC, 250VDC	240VAC	240VAC	240VAC
Coil Current	18 mA	17.5 mA	17.5 mA	17.5 mA
Mounting Type	Socketable	Socketable	Socketable	Socketable
Termination Style	Plug In, 8 Pin (Octal)	Plug In, 8 Pin (Octal)	Plug In, 8 Pin (Octal)	Plug In, 8 Pin (Octal)
Coil Type	Non Latching	Non Latching	Non Latching	Non Latching
Must Operate Voltage	96 VAC	102 VAC	102 VAC	102 VAC
Operating Temperature	-10°C ~ 40°C	-45°C ~ 55°C	-45°C ~ 55°C	-45°C ~ 55°C
Contact Material	Silver (Ag)	Silver Cadmium Oxide (AgCdO)	Silver Cadmium Oxide (AgCdO)	Silver Cadmium Oxide (AgCdO)
Coil Resistance	1.58 kOhms	2.25 kOhms	2.25 kOhms	2.25 kOhms
Product Status	Obsolete	Active	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Affected	Vendor Undefined	REACH Affected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable

Engineering Selection Recommendations

All three KRPA series relays function as direct substitutes for the MK2P-S-AC120 based on electrical and mechanical compatibility. Selection among the three should consider the following factors:

KRPA-11AG-120 and KRPA-11AN-120 are both active products with current manufacturing support and ROHS3 compliance. KRPA-11AG-120 provides standard functionality without additional features. KRPA-11AN-120 includes a lighted indicator feature and is recommended for applications requiring visual status indication.

KRPA-11AGP-120 is obsolete, similar to the original MK2P-S-AC120, and should be selected only when legacy system compatibility or specific historical documentation requirements necessitate its use.

The KRPA series relays operate at a higher must-operate voltage (102 VAC vs. 96 VAC) and feature an extended operating temperature range (-45°C to 55°C vs. -10°C to 40°C), providing enhanced performance margins in demanding environments. All substitute parts maintain the same 10A contact rating, DPDT configuration, and 8-pin octal socketable mounting required for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can KRPA-11AG-120, KRPA-11AGP-120, and KRPA-11AN-120 be used interchangeably with MK2P-S-AC120?

A: Yes. All three KRPA relays meet the critical substitution parameters: 120VAC coil voltage, DPDT contact form, 10A contact rating, socketable mounting, and 8-pin octal termination. Electrical and mechanical compatibility is confirmed.

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

A: KRPA-11AN-120 includes a lighted indicator feature, while KRPA-11AG-120 does not. Both are electrically equivalent and functionally interchangeable. Selection depends on whether visual status indication is required in the application.

Q: Why do the KRPA relays have different must-operate voltages than the MK2P-S-AC120?

A: The KRPA series specifies a must-operate voltage of 102 VAC compared to 96 VAC for the MK2P-S-AC120. This represents a tighter specification and does not prevent substitution. Applications operating at the original 96 VAC minimum will function reliably with KRPA relays.

Q: Are there compliance differences between the substitute parts?

A: KRPA-11AG-120 and KRPA-11AN-120 are ROHS3 compliant active products. KRPA-11AGP-120 is obsolete. All three carry EAR99 ECCN classification and HTSUS 8536.49.0075. REACH status varies: KRPA-11AG-120 and KRPA-11AN-120 are REACH Affected; KRPA-11AGP-120 is Vendor Undefined. Compliance requirements for your application should guide selection.

Q: Can MK2P-S-AC120 be replaced in existing designs?

A: Yes. The socketable 8-pin octal mounting allows direct socket replacement. No circuit modifications are required. The substitute relays maintain identical pin configuration and electrical interface.

Q: What is the contact material difference, and does it affect substitution?

A: MK2P-S-AC120 uses Silver (Ag) contacts; KRPA relays use Silver Cadmium Oxide (AgCdO). Both materials are suitable for general purpose relay applications at the specified 10A rating and switching voltages. Contact material does not prevent functional substitution.

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