JWD-172-5 Equivalent & Substitute Parts

Part Overview

The JWD-172-5 is a reed relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for applications requiring single-pole double-throw (SPDT) switching at 5VDC coil voltage. This through-hole mounted relay operates at 500 mA contact rating with ruthenium contacts and includes an integrated diode. The part is Active in product status and RoHS3 compliant.

Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed specifications for reed relay applications, enabling component interchangeability in circuit designs where the primary part becomes unavailable or when inventory constraints require alternative sourcing.

Substiute Parts

JWD-172-5

TE Connectivity Potter & Brumfield RelaysIn Stock: 2915JWD-172-5 Datasheet

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HE721C0510

Littelfuse Inc.In Stock: 1279HE721C0510 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JWD-172-5 is determined by alignment of the following critical parameters:

Primary Matching Criteria:

• Coil voltage: 5VDC
• Contact form: SPDT (1 Form C)
• Coil current: 25 mA
• Coil type: Non Latching
• Mounting type: Through Hole
• Termination style: PC Pin
• Features: Diode included
• RoHS compliance: ROHS3 Compliant

Secondary Compatibility Factors:

• Contact rating current (minimum acceptable threshold)
• Switching voltage capability
• Operating temperature range
• Coil resistance
• Must operate and release voltage specifications

The HE721C0510 from Littelfuse Inc. meets the primary matching criteria across all core electrical and mechanical parameters. Differences in contact rating current and switching voltage represent trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

JWD-172-5 (Primary Part): The JWD-172-5 is the specified component with Active product status and full RoHS3 compliance. Selection of this part is appropriate when 500 mA contact rating is required and inventory availability permits. The part supports switching voltages up to 28VDC and operates across the -35°C to 85°C temperature range.

HE721C0510 (Substitute Part): The HE721C0510 is an Active substitute with equivalent RoHS3 and REACH compliance. This part is suitable for applications where the 250 mA contact rating is sufficient for the circuit design. The substitute supports higher switching voltages (175VDC maximum) and extends the lower operating temperature limit to -40°C. The operate time specification differs at 3 ms compared to 1.5 ms for the primary part. Both parts share identical coil voltage, coil current, coil resistance, and termination characteristics.

Selection between these parts depends on application-specific current requirements and switching voltage constraints. Both parts maintain compliance with applicable regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the HE721C0510 directly replace the JWD-172-5 in all applications?

A: Direct replacement is possible only when the application circuit operates at or below 250 mA contact current. The HE721C0510 is not suitable for applications requiring the full 500 mA contact rating of the JWD-172-5. Both parts share identical coil voltage, coil current, and termination specifications, enabling mechanical and electrical compatibility in circuits within the 250 mA limit.

Q: What is the impact of the different operate time specifications?

A: The JWD-172-5 operates in 1.5 ms while the HE721C0510 operates in 3 ms. Applications with timing-critical switching requirements must account for this 1.5 ms difference. Both parts release in 3 ms. Circuits with strict timing constraints may require the faster response of the JWD-172-5.

Q: Are there packaging differences between these parts?

A: The JWD-172-5 is supplied in standard packaging, while the HE721C0510 is packaged in Tube format. Both parts use through-hole PC pin termination and are compatible with standard PCB assembly processes. Packaging format may affect handling and storage procedures but does not impact electrical or mechanical compatibility.

Q: Do both parts support the same operating temperature range?

A: The JWD-172-5 operates from -35°C to 85°C, while the HE721C0510 operates from -40°C to 85°C. The HE721C0510 extends the lower temperature limit by 5°C. For applications operating above -35°C, both parts are equivalent. Applications requiring operation below -35°C require the HE721C0510.

Q: What is the significance of the switching voltage difference?

A: The JWD-172-5 supports switching voltages up to 28VDC, while the HE721C0510 supports up to 175VDC. The HE721C0510 is suitable for higher voltage switching applications. For circuits operating at or below 28VDC, both parts are equivalent in this parameter.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the JWD-172-5 and HE721C0510 are RoHS3 compliant and REACH unaffected, meeting applicable environmental and regulatory requirements for electronic component manufacturing and use.