PRMA1B12 Reed Relay Equivalent & Substitute Parts

Part Overview

The PRMA1B12 is a through-hole mounted reed relay manufactured by Coto Technology, designed for single-pole single-throw (SPST) switching applications at 12VDC coil voltage with 500mA contact rating. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The PRMA1B12 operates within a temperature range of -40°C to 80°C and features non-latching coil operation with PC pin termination suitable for printed circuit board assembly.

Key Parameters

Parameter	Value
Coil Voltage	12VDC
Contact Form	SPST-NC (1 Form B)
Contact Rating (Current)	500 mA
Switching Voltage	200VAC, 200VDC - Max
Coil Current	12 mA
Coil Type	Non Latching
Mounting Type	Through Hole
Termination Style	PC Pin
Operating Temperature Range	-40°C ~ 80°C
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PRMA1B12 is determined by strict equivalence across the following critical parameters: coil voltage (12VDC), contact form (SPST-NC), contact current rating (500mA), mounting type (through-hole), termination style (PC pin), coil type (non-latching), and compliance certifications (RoHS and REACH status).

The JWD-171-14 manufactured by TE Connectivity Potter & Brumfield Relays satisfies these core substitution criteria. Both components share identical coil voltage, contact form, contact current rating, mounting configuration, and termination methodology. Both parts maintain RoHS compliance and REACH unaffected status, ensuring regulatory alignment for equivalent applications.

Substitution eligibility is contingent upon the following parameters matching between the main part and substitute:

Coil Voltage: 12VDC
Contact Form: SPST-NC (1 Form B)
Contact Rating (Current): 500 mA
Mounting Type: Through Hole
Termination Style: PC Pin
Coil Type: Non Latching
RoHS Compliance Status
REACH Status

Parameter Comparison

Parameter	PRMA1B12 (Coto Technology)	JWD-171-14 (TE Connectivity)	Match Status
Coil Voltage	12VDC	12VDC	Equivalent
Contact Form	SPST-NC (1 Form B)	SPST-NC (1 Form B)	Equivalent
Contact Rating (Current)	500 mA	500 mA	Equivalent
Switching Voltage - Max	200VAC, 200VDC	100VDC	Variant
Coil Current	12 mA	10 mA	Variant
Coil Type	Non Latching	Non Latching	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Termination Style	PC Pin	PC Pin	Equivalent
Must Operate Voltage	9 VDC	9.6 VDC	Variant
Must Release Voltage	1 VDC	1 VDC	Equivalent
Operate Time	0.5 ms	1.5 ms	Variant
Release Time	0.5 ms	0.5 ms	Equivalent
Operating Temperature Range	-40°C ~ 80°C	-35°C ~ 85°C	Variant
Coil Resistance	1 kOhms	1.2 kOhms	Variant
RoHS Status	RoHS Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Product Status	Obsolete	Active	Variant

Engineering Selection Recommendations

The JWD-171-14 serves as a functional equivalent for the obsolete PRMA1B12 based on alignment of core electrical and mechanical parameters. Both components maintain identical coil voltage, contact configuration, current rating, and mounting methodology, establishing direct substitution eligibility for through-hole PCB applications requiring 12VDC reed relay operation.

The JWD-171-14 holds active product status from TE Connectivity Potter & Brumfield Relays, ensuring ongoing availability and supply chain continuity. Both components satisfy RoHS compliance requirements and maintain REACH unaffected regulatory status, supporting deployment in applications subject to environmental and hazardous substance restrictions.

Parameter variations exist in switching voltage maximum rating, coil current draw, operate time, operating temperature range, and coil resistance. These variations require evaluation within the context of specific application requirements. The JWD-171-14 exhibits reduced maximum switching voltage (100VDC versus 200VDC), lower coil current consumption (10mA versus 12mA), extended operate time (1.5ms versus 0.5ms), and marginally higher operating temperature ceiling (85°C versus 80°C). Selection between these components depends on application-specific voltage switching requirements and timing constraints.

Frequently Asked Questions (FAQ)

Q: Can the JWD-171-14 directly replace the PRMA1B12 in existing designs?

A: The JWD-171-14 provides functional equivalence for applications where the switching voltage requirement does not exceed 100VDC and the extended operate time of 1.5ms is acceptable. Both components share identical coil voltage, contact form, current rating, and mounting configuration. Applications requiring the full 200VDC switching capability of the PRMA1B12 require evaluation of the JWD-171-14 switching voltage specification against circuit requirements.

Q: What are the key differences between these two relay models?

A: The primary differences are: (1) switching voltage maximum rating (PRMA1B12: 200VAC/200VDC; JWD-171-14: 100VDC), (2) coil current (PRMA1B12: 12mA; JWD-171-14: 10mA), (3) operate time (PRMA1B12: 0.5ms; JWD-171-14: 1.5ms), (4) operating temperature range (PRMA1B12: -40°C to 80°C; JWD-171-14: -35°C to 85°C), and (5) coil resistance (PRMA1B12: 1kOhms; JWD-171-14: 1.2kOhms). The PRMA1B12 is obsolete while the JWD-171-14 maintains active status.

Q: Are both components suitable for the same PCB assembly process?

A: Yes. Both the PRMA1B12 and JWD-171-14 utilize through-hole mounting with PC pin termination, supporting identical PCB assembly methodologies and footprint compatibility.

Q: What is the significance of the product status difference?

A: The PRMA1B12 is classified as obsolete, indicating discontinued manufacturing and limited availability. The JWD-171-14 maintains active product status, ensuring ongoing supply, technical support, and manufacturing continuity for new production and design implementations.

Q: Do both components meet the same regulatory compliance standards?

A: Both components satisfy RoHS compliance requirements and maintain REACH unaffected status. The PRMA1B12 is RoHS Compliant while the JWD-171-14 is ROHS3 Compliant, both meeting current environmental and hazardous substance regulations.

Q: What packaging format is available for the JWD-171-14?

A: The JWD-171-14 is supplied in tube packaging, suitable for automated and manual assembly processes.

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