PRMA2A12 Reed Relay DPST 500mA 12VDC Equivalent & Substitute Parts

Part Overview

The PRMA2A12 is a reed relay manufactured by Coto Technology, classified as a DPST-NO (2 Form A) switching device rated for 500mA at 12VDC. The device is currently obsolete, necessitating identification of active equivalent and substitute parts for continued circuit integration and procurement purposes.

Substiute Parts

PRMA2A12

Coto TechnologyIn Stock: 7152PRMA2A12 Datasheet

Current PartRFQ

HE722A1200

Littelfuse Inc.In Stock: 5042HE722A1200 Datasheet

SimilarRFQ

JWD-171-23

TE Connectivity Potter & Brumfield RelaysIn Stock: 1039JWD-171-23 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PRMA2A12 must satisfy the following critical parameters to ensure functional compatibility:

Primary Matching Criteria:

• Coil voltage: 12VDC
• Contact form: DPST-NO (2 Form A)
• Contact current rating: 500 mA minimum
• Termination style: PC Pin
• Mounting type: Through Hole
• Coil type: Non Latching
• Coil resistance: 500 Ohms

Secondary Compatibility Parameters:

• Switching voltage rating must meet or exceed 200VDC (original specification)
• Must operate voltage and release voltage must support standard 12V logic circuits
• Operating temperature range must accommodate application environment
• RoHS and REACH compliance status must meet regulatory requirements

HE722A1200 (Littelfuse Inc., HE700 series) and JWD-171-23 (TE Connectivity Potter & Brumfield, JWD series) satisfy these core criteria while maintaining active product status.

Parameter Comparison

Engineering Selection Recommendations

Both HE722A1200 and JWD-171-23 are active products with regulatory compliance status suitable for replacement of the obsolete PRMA2A12. Selection between these alternatives depends on application-specific requirements:

HE722A1200 (Littelfuse) maintains the highest switching voltage capability at 200VDC (equivalent to original), matching the PRMA2A12 specification and providing broader voltage range accommodation. RoHS3 and REACH compliance certified.

JWD-171-23 (TE Connectivity) offers reduced maximum switching voltage at 100VDC, which is acceptable for applications not requiring full 200VDC switching capability. Operating temperature range extends to -35°C minimum, and contact material specifies Ruthenium (Ru). RoHS3 and REACH compliance certified.

Both substitutes share identical coil specifications (12VDC, 24mA, 500 Ohms), contact rating (500mA DPST-NO), and termination style (PC Pin through-hole mounting), ensuring PCB compatibility and circuit integration without redesign.

Frequently Asked Questions (FAQ)

Q: Can HE722A1200 and JWD-171-23 be used interchangeably with PRMA2A12? A: Both parts satisfy the core electrical and mechanical parameters for direct replacement: 12VDC coil, 500mA DPST-NO contact form, PC Pin through-hole termination, and 500 Ohm coil resistance. Application voltage and temperature requirements determine final selection.

Q: What is the primary difference between the two substitutes? A: Maximum switching voltage rating differs. HE722A1200 supports 200VDC (matching original), while JWD-171-23 supports 100VDC. JWD-171-23 also specifies Ruthenium contact material and operates down to -35°C versus -40°C for HE722A1200.

Q: Are both substitutes RoHS and REACH compliant? A: Both HE722A1200 and JWD-171-23 carry RoHS3 and REACH Unaffected certifications, meeting modern regulatory requirements for electronics manufacturing.

Q: How do switching voltage specifications impact part selection? A: Applications switching voltages above 100VDC require HE722A1200. Applications limited to 100VDC or below may use either substitute. The PRMA2A12 original specification of 200VAC/200VDC aligns with HE722A1200 capability.

Q: What packaging and inventory status should be considered? A: HE722A1200 is available in tube packaging with 4,975 units in stock. JWD-171-23 is available in tube packaging with 1,017 units in stock. Both are active products with stable supply status.

Q: Are there timing differences between the parts? A: Yes. PRMA2A12 operates in 0.5ms and releases in 0.5ms. HE722A1200 operates in 1ms and releases in 1ms. JWD-171-23 operates in 1.5ms and releases in 0.5ms. Applications with timing-critical switching requirements should account for these variations.