JWD-107-7 Equivalent & Substitute Parts

Part Overview

The JWD-107-7 is a reed relay manufactured by TE Connectivity Potter & Brumfield Relays, configured as a single-pole single-throw (SPST) normally open contact form with 500 mA switching capacity at 12 VDC coil voltage. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The relay features a non-latching coil with integrated diode protection and PC pin termination suitable for through-hole mounting applications.

Substiute Parts

JWD-107-7

TE Connectivity Potter & Brumfield RelaysIn Stock: 839JWD-107-7 Datasheet

Current PartRFQ

HE721A1210

LittelfuseIn Stock: 1498HE721A1210 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JWD-107-7 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 12 VDC
• Contact form: SPST-NO (1 Form A)
• Contact rating: 500 mA minimum
• Coil type: Non-latching
• Integrated diode feature
• PC pin termination
• Through-hole mounting

Acceptable Variation Parameters:

• Switching voltage: Substitute must equal or exceed the original specification
• Coil current: Substitute may differ within circuit design tolerance
• Operate/release time: Substitute may differ if application timing is not critical
• Operating temperature range: Substitute must encompass or exceed the original range
• Coil resistance: Substitute may vary with different coil current specifications
• Contact material composition: Not specified for original part; substitutes may vary

The HE721A1210 manufactured by Littelfuse meets all mandatory matching parameters and qualifies as a direct substitute for the JWD-107-7.

Parameter Comparison

Engineering Selection Recommendations

The HE721A1210 (Littelfuse) is a qualified substitute for the discontinued JWD-107-7 (TE Connectivity Potter & Brumfield Relays) based on functional equivalence across all mandatory parameters.

Product Status Consideration: The JWD-107-7 is discontinued at DiGi Electronics, while the HE721A1210 maintains active product status with confirmed inventory availability (1454 units in stock). This status differential supports transition to the substitute part for new designs and production replenishment.

Compliance Alignment: Both parts maintain RoHS compliance. The HE721A1210 carries ROHS3 certification, representing current regulatory compliance standards. Both parts are classified under ECCN EAR99 and HTSUS 8536.41.0030, indicating equivalent trade classification.

Performance Differential: The HE721A1210 provides enhanced switching voltage capability (200 VDC versus 100 VDC maximum), lower must-operate voltage threshold (8 VDC versus 9.6 VDC), and extended low-temperature operating range (-40°C versus -35°C minimum). These characteristics represent performance improvements or equivalent functionality for standard applications. The substitute exhibits faster operate time (1 ms versus 1.5 ms) and slightly slower release time (1 ms versus 0.5 ms), which are acceptable variations for non-time-critical switching applications.

Packaging and Termination: Both parts utilize PC pin termination and through-hole mounting. The HE721A1210 is supplied in tube packaging, consistent with standard relay distribution formats.

Frequently Asked Questions (FAQ)

Q: Can the HE721A1210 directly replace the JWD-107-7 in existing circuit designs?

A: Yes. The HE721A1210 meets all functional requirements of the JWD-107-7, including coil voltage (12 VDC), contact form (SPST-NO), current rating (500 mA), and termination style (PC pin through-hole). No circuit modifications are required for direct substitution.

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

A: The primary differences are: (1) switching voltage maximum—HE721A1210 supports 200 VDC versus 100 VDC for JWD-107-7; (2) must-operate voltage—HE721A1210 operates at 8 VDC minimum versus 9.6 VDC for JWD-107-7; (3) operating temperature range—HE721A1210 extends to -40°C versus -35°C for JWD-107-7; (4) coil current—HE721A1210 draws 12 mA versus 10 mA for JWD-107-7; (5) switching speed—HE721A1210 operates in 1 ms versus 1.5 ms for JWD-107-7. All differences represent equivalent or improved performance characteristics.

Q: Are there any compatibility concerns with packaging or mounting?

A: No. Both relays use identical PC pin termination and through-hole mounting configuration. The HE721A1210 is supplied in tube packaging, which is standard for reed relay distribution and compatible with automated assembly processes.

Q: Does the higher coil current of the HE721A1210 (12 mA versus 10 mA) affect circuit design?

A: The 2 mA increase in coil current is a minor variation. Circuit designs must accommodate this specification during component selection. If the original design operates at the maximum current limit of the driving circuit, the substitute may require driver circuit evaluation. For standard applications with adequate current margin, this difference is not significant.

Q: What is the significance of the lower must-operate voltage for the HE721A1210?

A: The HE721A1210 operates reliably at 8 VDC minimum, compared to 9.6 VDC for the JWD-107-7. This represents improved performance in low-voltage applications and provides greater operational margin in circuits with voltage regulation tolerance. Applications designed for the JWD-107-7 will function without modification.

Q: Are both parts RoHS compliant?

A: Yes. The JWD-107-7 is RoHS Compliant, and the HE721A1210 is ROHS3 Compliant. Both meet current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the inventory status of these parts?

A: The JWD-107-7 is discontinued at DiGi Electronics with 818 units listed as new original in stock. The HE721A1210 is active product status with 1454 units in stock. For new designs and ongoing production, the HE721A1210 is the recommended selection based on active availability.