MK3P-I DC24 Equivalent & Substitute Parts

Part Overview

The MK3P-I DC24 is a general purpose relay manufactured by Omron Automation and Safety, featuring a 3PDT (3 Form C) contact configuration with 10A switching capacity at 24VDC coil voltage. This relay is designed for socketable mounting with an 11-pin octal termination style and includes a mechanical indicator for operational status.

The MK3P-I DC24 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new installations where this relay specification is required.

Key Parameters

Parameter	Value
Coil Voltage	24VDC
Contact Form	3PDT (3 Form C)
Contact Rating (Current)	10 A
Mounting Type	Socketable
Termination Style	Plug In, 11 Pin (Octal)
Coil Type	Non Latching
Relay Type	General Purpose

Substitute Part Grouping Explanation

Substitute parts for the MK3P-I DC24 are qualified based on the following critical parameters that must match or be compatible with the original specification:

Coil voltage: 24VDC (exact match required)
Contact form: 3PDT (3 Form C) (exact match required)
Contact rating: 10A minimum (exact match required)
Mounting type: Socketable (exact match required)
Termination style: Plug In, 11 Pin (Octal) (exact match required)
Coil type: Non Latching (exact match required)

The KRPA-14DG-24 and KRPA-14DN-24 from TE Connectivity Potter & Brumfield Relays meet all critical substitution criteria. Both parts are manufactured to the same contact configuration, coil voltage, current rating, and physical mounting specifications as the MK3P-I DC24.

Parameter Comparison

Parameter	MK3P-I DC24	KRPA-14DG-24	KRPA-14DN-24
Manufacturer	Omron Automation and Safety	TE Connectivity Potter & Brumfield Relays	TE Connectivity Potter & Brumfield Relays
Coil Voltage	24VDC	24VDC	24VDC
Contact Form	3PDT (3 Form C)	3PDT (3 Form C)	3PDT (3 Form C)
Contact Rating (Current)	10 A	10 A	10 A
Mounting Type	Socketable	Socketable	Socketable
Termination Style	Plug In, 11 Pin (Octal)	Plug In, 11 Pin (Octal)	Plug In, 11 Pin (Octal)
Coil Type	Non Latching	Non Latching	Non Latching
Coil Current	56 mA	51 mA	51 mA
Coil Resistance	430 Ohms	472 Ohms	472 Ohms
Switching Voltage (Max)	250VAC, 250VDC	240VAC	240VAC
Must Operate Voltage	19.2 VDC	18 VDC	18 VDC
Operating Temperature Range	-10°C ~ 40°C	-45°C ~ 70°C	-45°C ~ 70°C
Contact Material	Silver (Ag)	Silver Cadmium Oxide (AgCdO)	Silver Cadmium Oxide (AgCdO)
Product Status	Obsolete	Active	Active
Features	Mechanical Indicator	—	Lighted Indicator

Engineering Selection Recommendations

Both KRPA-14DG-24 and KRPA-14DN-24 are active products from TE Connectivity Potter & Brumfield Relays and provide direct functional equivalence to the obsolete MK3P-I DC24. The KRPA series relays are ROHS3 compliant and carry the same ECCN and HTSUS classifications as the original part.

The KRPA-14DG-24 is the base equivalent without additional features. The KRPA-14DN-24 includes a lighted indicator feature in addition to the standard functionality.

Both substitute parts operate at lower coil current (51 mA versus 56 mA) and feature an extended operating temperature range (-45°C ~ 70°C versus -10°C ~ 40°C), providing enhanced performance margins in thermal environments. The contact material differs (AgCdO versus Ag), which is standard for TE Connectivity relay designs and maintains equivalent switching performance within the specified voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can KRPA-14DG-24 or KRPA-14DN-24 be used as direct replacements for MK3P-I DC24?

A: Yes. Both parts meet all critical substitution parameters: identical 24VDC coil voltage, 3PDT contact configuration, 10A contact rating, socketable mounting, and 11-pin octal termination. Physical and electrical compatibility is confirmed.

Q: What is the difference between KRPA-14DG-24 and KRPA-14DN-24?

A: The KRPA-14DN-24 includes a lighted indicator feature, while the KRPA-14DG-24 does not. Both parts are otherwise electrically and mechanically identical and function as equivalents to the MK3P-I DC24.

Q: Are there differences in coil current between the original and substitute parts?

A: The MK3P-I DC24 operates at 56 mA coil current, while both KRPA substitutes operate at 51 mA. This lower current requirement is compatible with standard 24VDC control circuits and represents improved efficiency.

Q: What is the difference in contact material between the original and substitute parts?

A: The MK3P-I DC24 uses silver (Ag) contacts, while the KRPA-14DG-24 and KRPA-14DN-24 use silver cadmium oxide (AgCdO) contacts. Both materials are suitable for the specified 10A switching capacity and voltage ratings.

Q: Do the substitute parts support the same switching voltage as the original?

A: The MK3P-I DC24 supports 250VAC and 250VDC maximum switching voltage. The KRPA substitutes support 240VAC maximum. For applications requiring 250VDC switching, verify that the 240VAC rating is acceptable for your specific circuit design.

Q: What is the operating temperature range for the substitute parts?

A: Both KRPA-14DG-24 and KRPA-14DN-24 operate from -45°C to 70°C, which exceeds the original MK3P-I DC24 range of -10°C to 40°C. This extended range provides greater flexibility for installation in varied thermal environments.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both KRPA-14DG-24 and KRPA-14DN-24 are ROHS3 compliant. The original MK3P-I DC24 RoHS status is vendor undefined.

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