PRMA2A05 Reed Relay DPST 500MA 5V - Equivalent & Substitute Parts

Part Overview

The PRMA2A05 is a reed relay manufactured by Coto Technology, classified as a DPST-NO (2 Form A) contact configuration with 500 mA contact rating at 5VDC coil voltage. This component operates as a non-latching relay suitable for Through Hole mounting on printed circuit boards. The product status is Obsolete, necessitating identification of equivalent substitute parts that maintain functional compatibility for design continuity and procurement alternatives.

Substiute Parts

PRMA2A05

Coto TechnologyIn Stock: 1481PRMA2A05 Datasheet

Current PartRFQ

8L02-05-00

Coto TechnologyIn Stock: 15748L02-05-00 Datasheet

DirectRFQ

HE722A0600

Littelfuse Inc.In Stock: 14159HE722A0600 Datasheet

DirectRFQ

HE722A0500

Littelfuse Inc.In Stock: 1115HE722A0500 Datasheet

SimilarRFQ

JWD-171-21

TE Connectivity Potter & Brumfield RelaysIn Stock: 1042JWD-171-21 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PRMA2A05 are identified based on matching the following critical parameters:

• Coil Voltage: 5VDC (all substitutes maintain this specification)
• Contact Form: DPST-NO (2 Form A) configuration
• Contact Rating (Current): 500 mA maximum current handling
• Coil Type: Non Latching operation
• Mounting Type: Through Hole with PC Pin termination
• Operating Voltage Range: Must Operate and Must Release voltage specifications determine circuit compatibility

Substitutes are classified as Direct or Similar based on deviation in secondary parameters such as coil current, operating temperature range, switching voltage limits, and operate/release timing characteristics. All identified substitutes maintain the primary electrical and mechanical specifications required for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 8L02-05-00 (Coto Technology)

The 8L02-05-00 is a direct substitute manufactured by the same supplier as the obsolete PRMA2A05. This part maintains identical contact specifications and switching voltage ratings. The product is Active status with established supply availability (1500 Pcs). ROHS3 Compliant certification supports modern manufacturing and procurement requirements.

Secondary Recommendation: HE722A0500 (Littelfuse Inc.)

The HE722A0500 provides functional equivalence with Active product status and robust supply inventory (1103 Pcs). This Littelfuse HE700 series part maintains identical coil voltage, contact rating, and operating voltage specifications. ROHS3 Compliant status ensures regulatory alignment. Operating temperature range extends to 85°C, providing broader thermal operating envelope than the original PRMA2A05.

Tertiary Recommendation: HE722A0600 (Littelfuse Inc.)

The HE722A0600 is an alternative within the same Littelfuse HE700 series. This variant offers stronger inventory availability (14100 Pcs) and extended temperature range (-40°C ~ 85°C), matching the original PRMA2A05 lower temperature limit. Coil current specification of 33.3 mA closely aligns with the original 35.8 mA, reducing design circuit modifications.

Alternative: JWD-171-21 (TE Connectivity Potter & Brumfield Relays)

The JWD-171-21 provides functional compatibility for applications where switching voltage is limited to 100VDC maximum. This TE Connectivity part maintains identical coil voltage and contact ratings with 500 mA current handling. The Ruthenium contact material differs from unstated material compositions in other substitutes. Use of this part is appropriate only where circuit switching voltages remain below 100VDC specifications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PRMA2A05 with any of these substitutes?

A: Direct replacement is dependent on application switching voltage requirements. For applications using 200VAC or 200VDC switching, use 8L02-05-00, HE722A0500, or HE722A0600. For applications limited to 100VDC or less, JWD-171-21 is suitable. Circuit board footprint compatibility with Through Hole PC Pin termination is standard across all substitutes.

Q: What are the main differences between HE722A0600 and HE722A0500?

A: Both parts maintain identical contact form and rating specifications. HE722A0600 has 33.3 mA coil current versus 25 mA in HE722A0500. HE722A0600 provides higher inventory availability. For new designs, HE722A0500 offers lower coil current consumption, reducing power supply loading.

Q: Does the coil current difference affect circuit design?

A: Coil current affects power supply requirements and drive circuit design. The original PRMA2A05 operates at 35.8 mA. Substitute parts with lower coil current (8L02-05-00, HE722A0500, JWD-171-21 at 25 mA, or HE722A0600 at 33.3 mA) reduce power consumption. Existing 5VDC supply circuits designed for higher current will function with lower-current substitutes without modification. Circuits designed for minimum current may require validation.

Q: What is the impact of different operate and release times?

A: The original PRMA2A05 operates and releases in 0.5 ms. Substitutes 8L02-05-00 match this timing. Littelfuse parts (HE722A0600, HE722A0500) operate and release in 1 ms each. JWD-171-21 operates in 1.5 ms with 0.5 ms release. Applications with timing-critical switching functions must account for these differences in circuit design and testing.

Q: Are all substitutes RoHS and REACH compliant?

A: The original PRMA2A05 is RoHS Compliant. All substitute parts are ROHS3 Compliant, meeting current RoHS Recast (Directive 2011/65/EU) requirements. All parts carry REACH Unaffected status, indicating no registration requirements under REACH Regulation (EC 1907/2006).

Q: What packaging considerations apply to substitution?

A: The original PRMA2A05 uses standard packaging (not specified). Substitute packaging includes: 8L02-05-00 in Tube packaging; HE722A0600 and HE722A0500 in Tube packaging; JWD-171-21 in Bulk packaging. Tube packaging provides standard component tape and reel or container formats suitable for automated assembly. Bulk packaging requires manual sorting and handling. Packaging selection affects procurement workflow and assembly line integration.