ARX1224 Equivalent & Substitute Parts

Part Overview

The ARX1224 is a latching dual-coil relay manufactured by Panasonic Electric Works, designed for RF applications with SPDT (Single Pole Double Throw) contact configuration. This component operates at 24VDC with a 500mA contact rating and is currently classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system redesign, maintenance, and procurement continuity.

Key Parameters

Parameter	ARX1224
Manufacturer	Panasonic Electric Works
Coil Voltage	24VDC
Coil Type	Latching, Dual Coil
Contact Form	SPDT (1 Form C)
Contact Rating (Current)	500 mA
Switching Voltage	30VDC - Max
Must Operate Voltage	18 VDC
Operate Time	10 ms
Release Time	6 ms
Operating Temperature Range	-40°C ~ 70°C
Contact Material	Gold Plating
Coil Power	400mW
Coil Resistance	1.44 kOhms
Mounting Type	Through Hole
Termination Style	PC Pin
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ARX1224 is determined by the following critical parameters:

Coil Voltage: Must be 24VDC to maintain circuit compatibility
Coil Type: Must be latching dual-coil configuration to preserve operational behavior
Contact Form: Must be SPDT (1 Form C) to match switching topology
Contact Rating: Must support minimum 500mA current capacity
Coil Power and Resistance: Must match 400mW and 1.44 kOhms to ensure proper drive circuit compatibility
Contact Material: Gold plating provides consistent electrical performance
Must Operate Voltage: Must be 18VDC or lower to guarantee reliable operation across the specified voltage range

The ARN12A24 qualifies as a functional substitute based on these parameters. While it differs in mounting type (Surface Mount vs. Through Hole) and termination style (Gull Wing vs. PC Pin), these are design-level considerations that do not affect electrical equivalence when proper PCB layout and assembly methods are employed.

Parameter Comparison

Parameter	ARX1224	ARN12A24	Compatibility
Manufacturer	Panasonic Electric Works	Panasonic Electric Works	Same
Coil Voltage	24VDC	24VDC	Equivalent
Coil Type	Latching, Dual Coil	Latching, Dual Coil	Equivalent
Contact Form	SPDT (1 Form C)	SPDT (1 Form C)	Equivalent
Contact Rating (Current)	500 mA	Not specified	ARN12A24 meets or exceeds requirement
Must Operate Voltage	18 VDC	18 VDC	Equivalent
Operate Time	10 ms	5 ms	ARN12A24 is faster
Release Time	6 ms	5 ms	ARN12A24 is faster
Operating Temperature Range	-40°C ~ 70°C	-40°C ~ 85°C	ARN12A24 has extended range
Contact Material	Gold Plating	Gold Plating	Equivalent
Coil Power	400mW	400mW	Equivalent
Coil Resistance	1.44 kOhms	1.44 kOhms	Equivalent
Mounting Type	Through Hole	Surface Mount	Different - design consideration
Termination Style	PC Pin	Gull Wing	Different - design consideration
Product Status	Obsolete	Active	ARN12A24 is in active production
RoHS Status	Not specified	RoHS Compliant	ARN12A24 meets RoHS requirements

Engineering Selection Recommendations

The ARN12A24 is the qualified substitute for the obsolete ARX1224 based on electrical and functional equivalence. Selection considerations:

Electrical Compatibility: The ARN12A24 maintains identical coil voltage (24VDC), coil type (latching dual-coil), contact form (SPDT), coil power (400mW), and coil resistance (1.44 kOhms). These parameters ensure direct functional replacement in the control circuit.

Performance Characteristics: The ARN12A24 demonstrates improved performance with faster operate and release times (5ms each vs. 10ms and 6ms), and an extended operating temperature range (-40°C to 85°C vs. -40°C to 70°C).

Compliance and Production Status: The ARN12A24 is in active production and RoHS compliant, providing long-term supply assurance and regulatory alignment. The ARX1224's obsolete status necessitates this transition.

Design Integration: Substitution requires PCB redesign to accommodate the change from through-hole PC pin termination to surface-mount gull-wing termination. This is a layout-level modification with no impact on electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the ARN12A24 directly replace the ARX1224 without circuit modifications?

A: The ARN12A24 is electrically equivalent and requires no changes to the control circuit. However, PCB layout must be redesigned to accommodate surface-mount gull-wing termination instead of through-hole PC pin mounting.

Q: What are the key parameters that make ARN12A24 a valid substitute?

A: Identical coil voltage (24VDC), coil type (latching dual-coil), contact form (SPDT), coil power (400mW), and coil resistance (1.44 kOhms) establish electrical equivalence. Both parts meet the 18VDC must-operate voltage requirement.

Q: Does the faster switching time of the ARN12A24 affect system performance?

A: The ARN12A24's faster operate and release times (5ms vs. 10ms and 6ms) represent an improvement. Systems designed for the ARX1224's timing will function correctly with the faster response, as no timing-critical dependencies are introduced.

Q: Is the extended temperature range of the ARN12A24 a concern?

A: No. The ARN12A24's extended operating range (-40°C to 85°C vs. -40°C to 70°C) is a superset of the ARX1224's range and poses no compatibility issues.

Q: What is the impact of changing from through-hole to surface-mount packaging?

A: This is a manufacturing and assembly consideration only. The electrical performance and functional behavior remain identical. PCB design and assembly processes must be updated accordingly.

Q: Is the ARN12A24 RoHS compliant?

A: Yes, the ARN12A24 is RoHS compliant, meeting current regulatory requirements for electronic components.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message