D3526W Equivalent & Substitute Parts

Part Overview

The D3526W is a telecom relay manufactured by TE Connectivity Potter & Brumfield Relays, configured as a DPDT (2 Form C) surface mount component with 2A contact rating at 12VDC. This part operates in the FU2 and AXICOM series and features gull wing termination for surface mount assembly. The D3526W is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

D3526W

TE Connectivity Potter & Brumfield RelaysIn Stock: 1092D3526W Datasheet

Current PartRFQ

TX2SA-12V-X

Panasonic Electric WorksIn Stock: 7245TX2SA-12V-X Datasheet

DirectRFQ

TXD2SL-12V

Panasonic Electric WorksIn Stock: 1117TXD2SL-12V Datasheet

SimilarRFQ

TXD2SL-12V-Z

Panasonic Electric WorksIn Stock: 824TXD2SL-12V-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3526W is determined by strict equivalence across the following critical parameters: coil voltage (12VDC), contact form (DPDT), contact rating (2A), mounting type (surface mount), termination style (gull wing), and coil resistance (720 Ohms). Additional compatibility factors include must-operate voltage (9VDC), must-release voltage (1.2VDC), and non-latching coil type.

The substitute parts identified are grouped into two categories:

Direct Equivalent (TX2SA-12V-X): Maintains all critical electrical parameters with identical coil voltage, contact form, contact rating, and mounting configuration. This part operates with reduced coil current (11.7 mA versus 16.7 mA) and faster switching times (4 ms versus 5 ms), representing an active product with enhanced performance characteristics.

Functional Equivalents (TXD2SL-12V, TXD2SL-12V-Z): Maintain coil voltage, contact form, contact rating, mounting type, and coil resistance. These parts are classified as general purpose relays rather than telecom relays, with identical coil current (16.7 mA) and switching times (4 ms) compared to the original specification.

Parameter Comparison

Engineering Selection Recommendations

TX2SA-12V-X Selection: This Panasonic Electric Works part is the primary direct equivalent for D3526W replacement. It maintains all critical electrical parameters including 12VDC coil voltage, DPDT contact form, 2A contact rating, and gull wing surface mount termination. The TX2SA-12V-X is an active product with ROHS3 compliance and REACH unaffected status, providing superior regulatory compliance compared to the obsolete D3526W. The reduced coil current (11.7 mA) and faster switching times (4 ms) represent performance improvements. The fully sealed construction provides enhanced environmental protection. The narrower operating temperature range (-40°C to 85°C versus -55°C to 85°C) must be evaluated against application requirements.

TXD2SL-12V and TXD2SL-12V-Z Selection: These Panasonic Electric Works parts provide functional equivalence with identical coil resistance (720 Ohms) and coil current (16.7 mA) matching the original D3526W specification. Both parts maintain all critical electrical parameters and are active products with RoHS compliance. The TXD2SL-12V is supplied in tube packaging, while TXD2SL-12V-Z is supplied in tape and reel format. These parts are classified as general purpose relays rather than telecom relays, which may be relevant for application-specific requirements. The fully sealed construction and faster switching times (4 ms) provide operational advantages.

All substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain stability compared to the obsolete D3526W.

Frequently Asked Questions (FAQ)

Q: What makes TX2SA-12V-X a direct equivalent to D3526W?

A: TX2SA-12V-X maintains all critical electrical parameters: 12VDC coil voltage, DPDT (2 Form C) contact configuration, 2A contact rating, 9VDC must-operate voltage, 1.2VDC must-release voltage, and gull wing surface mount termination. The coil resistance differs (1.03 kOhms versus 720 Ohms), resulting in lower coil current draw (11.7 mA versus 16.7 mA) and faster switching response (4 ms versus 5 ms).

Q: Can TXD2SL-12V and TXD2SL-12V-Z be used interchangeably with D3526W?

A: Yes, both parts provide functional equivalence. They maintain identical coil voltage (12VDC), contact form (DPDT), contact rating (2A), coil resistance (720 Ohms), and coil current (16.7 mA) as the D3526W. The primary difference is classification as general purpose relays rather than telecom relays. Both are fully sealed and offer faster switching times (4 ms).

Q: What is the difference between TXD2SL-12V and TXD2SL-12V-Z?

A: Both parts are electrically and mechanically identical. The difference is packaging format: TXD2SL-12V is supplied in tube packaging, while TXD2SL-12V-Z is supplied in tape and reel (TR) format. Selection depends on assembly process requirements and volume considerations.

Q: Does the operating temperature range difference affect substitution?

A: The D3526W operates from -55°C to 85°C, while all substitute parts operate from -40°C to 85°C. Applications requiring operation below -40°C cannot use the substitute parts. Applications within the -40°C to 85°C range are fully compatible.

Q: What is the significance of the seal rating difference?

A: The D3526W seal rating is not specified in the documentation. All substitute parts (TX2SA-12V-X, TXD2SL-12V, TXD2SL-12V-Z) feature fully sealed construction, providing enhanced protection against moisture and environmental contamination. This represents an improvement over the original specification.

Q: Are there compliance differences between the substitute parts?

A: TX2SA-12V-X carries ROHS3 compliance with REACH unaffected status, representing the highest regulatory standard. TXD2SL-12V and TXD2SL-12V-Z carry RoHS compliance. All parts are EAR99 classified. The D3526W is RoHS compliant but obsolete. TX2SA-12V-X is recommended for applications requiring maximum regulatory compliance.

Q: How does contact material composition affect substitution?

A: The D3526W uses Palladium (Pd), Ruthenium (Ru), and Gold (Au) contact materials. All substitute parts use Silver (Ag) and Gold (Au) contact materials. Both compositions are suitable for 2A switching applications at 220VDC maximum switching voltage. Contact material selection depends on specific application requirements regarding contact resistance, wear characteristics, and environmental exposure.

Q: What packaging options are available for the substitute parts?

A: TX2SA-12V-X is supplied in tape and reel (TR) format. TXD2SL-12V is supplied in tube packaging. TXD2SL-12V-Z is supplied in tape and reel (TR) format. Selection depends on assembly equipment compatibility and production volume requirements.