ARX1112 Equivalent & Substitute Parts

Part Overview

The ARX1112 is a latching single-coil RF relay manufactured by Panasonic Electric Works, designed for 12VDC applications with SPDT contact configuration and 500mA switching capacity. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The ARX1112 operates with a coil voltage of 12VDC, 16.7mA coil current, and features gold-plated contacts suitable for RF switching applications. Identification of compatible alternatives ensures design continuity and supply chain reliability.

Substiute Parts

ARX1112

Panasonic Electric WorksIn Stock: 976ARX1112 Datasheet

Current PartRFQ

ARN12A12

Panasonic Electric WorksIn Stock: 806ARN12A12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ARX1112 is based on the following critical parameters that must align across alternatives:

• Coil voltage: 12VDC (primary control signal requirement)
• Contact form: SPDT (1 Form C) (functional switching topology)
• Contact material: Gold plating (signal integrity and reliability)
• Manufacturer: Panasonic Electric Works (design lineage and compatibility)
• Must operate voltage: 9VDC minimum (activation threshold)

The ARN12A12 qualifies as a substitute based on matching coil voltage (12VDC), contact form (SPDT), contact material (gold plating), and manufacturer origin. Both components are Panasonic Electric Works products within the same relay family. The ARN12A12 is active product status, ensuring ongoing availability and support.

Parameter Comparison

Engineering Selection Recommendations

The ARN12A12 is the designated substitute for the obsolete ARX1112 based on core functional parameters: identical 12VDC coil voltage, SPDT contact configuration, gold-plated contacts, and 9VDC must-operate threshold. Both components originate from Panasonic Electric Works and maintain the same relay family lineage.

Critical design considerations for substitution:

• Coil control architecture differs: ARX1112 uses single-coil latching; ARN12A12 uses dual-coil latching. Circuit design must accommodate dual-coil control signals.
• Coil current requirement increases from 16.7mA to 33.3mA. Driver circuits must supply adequate current capacity.
• Mounting and termination are incompatible: ARX1112 is through-hole with PC pins; ARN12A12 is surface-mount with gull-wing leads. PCB redesign is required.
• Operating temperature maximum increases from 70°C to 85°C, providing expanded thermal margin.
• Switching speed improves: operate time reduces from 10ms to 5ms; release time reduces from 6ms to 5ms.

The ARN12A12 is active product status, ensuring long-term availability and supply chain continuity compared to the obsolete ARX1112.

Frequently Asked Questions (FAQ)

Q: Can the ARN12A12 directly replace the ARX1112 without circuit modification?

A: No. The ARN12A12 requires dual-coil control signals, while the ARX1112 uses single-coil latching. Circuit redesign is necessary to generate set and reset pulses for the ARN12A12. Additionally, mounting type and termination style differ, requiring PCB layout changes.

Q: What is the coil current difference, and does it affect driver selection?

A: The ARX1112 draws 16.7mA; the ARN12A12 draws 33.3mA. Driver circuits must supply double the current capacity. Verify that existing driver circuits can source 33.3mA per coil winding without exceeding maximum ratings.

Q: Are the contact ratings compatible between these relays?

A: The ARX1112 contact rating is specified as 500mA. The ARN12A12 contact rating is not provided in the available dataset. Contact load requirements must be verified against Panasonic Electric Works detailed specifications for the ARN12A12 before final selection.

Q: What are the mounting and termination differences?

A: The ARX1112 is through-hole mounted with PC pin termination, suitable for traditional PCB assembly. The ARN12A12 is surface-mount with gull-wing leads, requiring SMT assembly processes. Existing through-hole footprints are incompatible with the ARN12A12 and require redesign.

Q: Does the ARN12A12 operate faster than the ARX1112?

A: Yes. The ARN12A12 operates in 5ms and releases in 5ms, compared to the ARX1112 at 10ms operate and 6ms release. This faster switching response may affect circuit timing in applications with strict temporal requirements.

Q: What is the temperature operating range difference?

A: The ARX1112 operates from -40°C to 70°C. The ARN12A12 operates from -40°C to 85°C, providing 15°C additional maximum temperature margin. This expanded range may benefit applications in elevated-temperature environments.

Q: Why is the ARX1112 obsolete, and what does this mean for supply?

A: Obsolete status indicates the ARX1112 is no longer manufactured by Panasonic Electric Works. Existing inventory may be available from authorized distributors, but long-term supply is not guaranteed. The ARN12A12 is active product status, ensuring reliable ongoing availability and manufacturer support.