LKP1AF-12V Equivalent & Substitute Parts

Part Overview

The LKP1AF-12V is a general purpose relay manufactured by Panasonic Electric Works, configured as a Single Pole Single Throw Normally Open (SPST-NO) contact form with a 12VDC coil. This through-hole mounted relay is rated for 10A switching capacity and operates across a temperature range of -40°C to 70°C. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	LKP1AF-12V
Manufacturer	Panasonic Electric Works
Contact Form	SPST-NO (1 Form A)
Coil Voltage	12VDC
Contact Rating (Current)	10 A
Switching Voltage	277VAC, 30VDC - Max
Mounting Type	Through Hole
Termination Style	PC Pin
Coil Resistance	272 Ohms
Operating Temperature Range	-40°C ~ 70°C
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the LKP1AF-12V is determined by strict equivalence across the following critical parameters:

Contact form must remain SPST-NO (1 Form A) to maintain circuit switching topology. Coil voltage must be 12VDC to ensure compatibility with existing power supply circuits. Contact rating of 10A is the minimum switching capacity required. Mounting type must be through-hole with PC pin termination to ensure mechanical and electrical compatibility with printed circuit board layouts. Coil resistance tolerance (272 Ohms nominal) ensures proper operation within the specified must-operate and must-release voltage thresholds.

The JW1AFHN-DC12V-F meets all critical substitution criteria while maintaining functional equivalence for the obsolete LKP1AF-12V.

Parameter Comparison

Parameter	LKP1AF-12V	JW1AFHN-DC12V-F	Compatibility
Manufacturer	Panasonic Electric Works	Panasonic Electric Works	Same
Contact Form	SPST-NO (1 Form A)	SPST-NO (1 Form A)	Equivalent
Coil Voltage	12VDC	12VDC	Equivalent
Contact Rating (Current)	10 A	10 A	Equivalent
Switching Voltage	277VAC, 30VDC - Max	250VAC, 30VDC - Max	Compatible (JW1AFHN rated lower on AC)
Coil Current	44.2 mA	44 mA	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Termination Style	PC Pin	PC Pin	Equivalent
Coil Resistance	272 Ohms	270 Ohms	Equivalent (within tolerance)
Must Operate Voltage	8.4 VDC	8.4 VDC	Equivalent
Must Release Voltage	1.2 VDC	1.2 VDC	Equivalent
Operate Time	15 ms	15 ms	Equivalent
Release Time	5 ms	5 ms	Equivalent
Operating Temperature Range	-40°C ~ 70°C	-40°C ~ 60°C	Compatible (JW1AFHN has narrower range)
Contact Material	Silver Tin Oxide (AgSnO)	Silver Tin Oxide (AgSnO)	Equivalent
Seal Rating	Sealed - Flux Protection	Sealed - Flux Protection	Equivalent
Product Status	Obsolete	Active	Substitute is in active production
RoHS Status	RoHS Compliant	RoHS Compliant	Equivalent

Engineering Selection Recommendations

The JW1AFHN-DC12V-F is the qualified substitute for the obsolete LKP1AF-12V. Both components are manufactured by Panasonic Electric Works and maintain identical contact form, coil voltage, current rating, and switching characteristics. The substitute part is currently in active production status, ensuring availability for procurement and long-term supply chain continuity.

The JW1AFHN-DC12V-F operates across a reduced temperature range (-40°C to 60°C) compared to the original part (-40°C to 70°C). Applications requiring operation above 60°C must be evaluated against actual system thermal requirements. The AC switching voltage rating of the substitute is 250VAC versus 277VAC for the original; applications switching AC loads must confirm that 250VAC rating is sufficient for the intended circuit.

Both parts carry RoHS compliance certification and identical moisture sensitivity level (MSL 1 - Unlimited), supporting regulatory and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can the JW1AFHN-DC12V-F be used as a direct replacement for the LKP1AF-12V?

A: Yes, the JW1AFHN-DC12V-F is functionally equivalent for applications operating within -40°C to 60°C and switching AC loads up to 250VAC. The contact form, coil voltage, current rating, and switching times are identical. Verify that your application does not require operation above 60°C or AC switching above 250VAC.

Q: What are the key differences between these two relays?

A: The primary differences are product status (LKP1AF-12V is obsolete; JW1AFHN-DC12V-F is active), operating temperature range (70°C maximum versus 60°C maximum), and AC switching voltage rating (277VAC versus 250VAC). DC switching capability and all timing parameters remain identical.

Q: Are the physical dimensions and pin configurations identical?

A: Both relays use through-hole mounting with PC pin termination. The base product numbers differ (LKP1A versus JW1AF), indicating they are from different relay series within Panasonic Electric Works. Physical compatibility with existing PCB layouts must be verified against mechanical drawings for each part.

Q: Do both relays meet RoHS compliance requirements?

A: Yes, both the LKP1AF-12V and JW1AFHN-DC12V-F are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the coil resistance tolerance between these parts?

A: The LKP1AF-12V has a coil resistance of 272 Ohms, while the JW1AFHN-DC12V-F is rated at 270 Ohms. This 2-Ohm difference is within normal manufacturing tolerance and does not affect relay operation, as both parts meet the identical must-operate voltage (8.4 VDC) and must-release voltage (1.2 VDC) specifications.

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