D3523W Equivalent & Substitute Parts

Part Overview

The D3523W is a telecom relay manufactured by TE Connectivity Potter & Brumfield Relays, classified as a DPDT (2 Form C) surface mount component with a 5VDC coil voltage and 2A contact rating. This part is designated as obsolete, necessitating identification of equivalent substitute components for ongoing applications. The D3523W operates across a temperature range of -55°C to 85°C and features palladium, ruthenium, and gold contact materials suitable for telecom switching applications.

Due to its obsolete status, equivalent and substitute parts must be sourced from active product lines to ensure continued availability and supply chain reliability.

Substiute Parts

D3523W

TE Connectivity Potter & Brumfield RelaysIn Stock: 1136D3523W Datasheet

Current PartRFQ

TX2SA-5V-X

Panasonic Electric WorksIn Stock: 1458TX2SA-5V-X Datasheet

DirectRFQ

TXD2SL-5V-Z

Panasonic Electric WorksIn Stock: 669TXD2SL-5V-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the D3523W are identified based on strict electrical and mechanical parameter compatibility. The following criteria determine substitution eligibility:

Primary Matching Parameters:

• Coil Voltage: 5VDC (exact match required)
• Contact Form: DPDT (2 Form C) (exact match required)
• Contact Rating: 2 A (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Termination Style: Gull Wing (exact match required)
• Coil Type: Non Latching (exact match required)

Secondary Compatibility Parameters:

• Must Operate Voltage: 3.75 VDC (exact match required)
• Must Release Voltage: 0.5 VDC (exact match required)
• Switching Voltage: 220VDC minimum (acceptable if equal to or exceeds specification)
• Operating Temperature Range: Must accommodate -40°C to 85°C minimum (acceptable if equal to or exceeds lower bound)
• Coil Resistance: Tolerance within component design specifications

Two substitute parts meet these criteria: TX2SA-5V-X (direct telecom relay equivalent) and TXD2SL-5V-Z (general purpose relay equivalent with matching electrical parameters).

Parameter Comparison

Engineering Selection Recommendations

TX2SA-5V-X (Primary Substitute)

The TX2SA-5V-X is classified as a direct substitute for the D3523W. Both components are designated as telecom relays with identical electrical specifications for coil voltage, contact form, contact rating, and switching thresholds. The TX2SA-5V-X is manufactured by Panasonic Electric Works and maintains active product status, ensuring supply chain continuity. This part features lower coil current (28.1 mA versus 40 mA), which reduces power consumption in the application circuit. The TX2SA-5V-X achieves faster switching times (4 ms operate and release versus 5 ms), providing improved response characteristics. The component is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Operating temperature range is -40°C to 85°C, which covers the upper portion of the D3523W specification but does not extend to the lower -55°C limit.

TXD2SL-5V-Z (Secondary Substitute)

The TXD2SL-5V-Z is classified as a similar substitute for the D3523W. This component is designated as a general purpose relay rather than a telecom relay, but maintains all critical electrical parameters including coil voltage, contact form, contact rating, and switching thresholds. The TXD2SL-5V-Z is manufactured by Panasonic Electric Works with active product status. Coil current and resistance match the D3523W specification (40 mA and 125 Ohms respectively), ensuring equivalent power requirements. Switching times are improved at 4 ms. The component is RoHS compliant and available in Tape & Reel packaging. Operating temperature range is -40°C to 85°C, consistent with the TX2SA-5V-X limitation at the lower temperature bound.

Selection Criteria:

For applications requiring telecom-grade relay specifications and lower power consumption, the TX2SA-5V-X is the preferred substitute. For applications where general purpose relay classification is acceptable and coil current matching is prioritized, the TXD2SL-5V-Z provides equivalent functionality. Both substitutes are active products with current compliance certifications. Applications operating below -40°C require evaluation of the temperature limitation against the original D3523W specification of -55°C.

Frequently Asked Questions (FAQ)

Q: Can the TX2SA-5V-X directly replace the D3523W in all applications?

A: The TX2SA-5V-X meets all primary electrical and mechanical specifications for substitution. The operating temperature range difference (-40°C to 85°C versus -55°C to 85°C) must be evaluated against application requirements. If the application operates below -40°C, this substitute is not suitable.

Q: What is the difference between the TX2SA-5V-X and TXD2SL-5V-Z?

A: Both parts meet the electrical requirements for substitution. The TX2SA-5V-X is classified as a telecom relay with lower coil current (28.1 mA). The TXD2SL-5V-Z is classified as a general purpose relay with coil current matching the D3523W (40 mA). Selection depends on whether telecom-grade classification or coil current matching is prioritized for the application.

Q: Why does the TX2SA-5V-X have different coil resistance (178 Ohms) compared to the D3523W (125 Ohms)?

A: Coil resistance variation results from different winding designs between manufacturers while maintaining the same coil voltage and current specifications. The TX2SA-5V-X achieves lower coil current (28.1 mA) through higher resistance, reducing power consumption. Both designs operate at 5VDC and meet the must-operate and must-release voltage thresholds.

Q: Are both substitute parts available in the same packaging as the D3523W?

A: Both TX2SA-5V-X and TXD2SL-5V-Z are supplied in Tape & Reel (TR) packaging. The D3523W packaging specification was not provided in the original documentation. Packaging compatibility must be verified against assembly equipment and process requirements.

Q: What compliance certifications do the substitute parts carry?

A: The TX2SA-5V-X is ROHS3 compliant and REACH unaffected. The TXD2SL-5V-Z is RoHS compliant. Both parts carry the same ECCN (EAR99) and HTSUS (8536.41.0020) classifications as the D3523W.

Q: How do the switching times compare between the D3523W and substitute parts?

A: The D3523W operates and releases in 5 ms. Both substitute parts (TX2SA-5V-X and TXD2SL-5V-Z) operate and release in 4 ms, providing faster switching response. Applications with timing-critical requirements must account for this 1 ms improvement.

Q: Is the seal rating difference significant for substitution?

A: The D3523W seal rating was not specified. Both substitute parts are rated as "Sealed - Fully," providing enhanced protection against moisture and environmental contamination. This represents an improvement over the original specification and does not restrict substitution.

Q: Can the TXD2SL-5V-Z be used in applications originally designed for telecom relays?

A: The TXD2SL-5V-Z meets all electrical and mechanical specifications for the D3523W. The classification difference (general purpose versus telecom) reflects design intent rather than functional capability. Applications must evaluate whether telecom-grade specifications are required by system design or regulatory requirements.