D3523N Equivalent & Substitute Parts

Part Overview

The D3523N is a telecom relay manufactured by TE Connectivity Potter & Brumfield Relays, classified as a DPDT (2 Form C) surface mount relay with a 5VDC coil voltage and 2A contact rating. This component is designated as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations. The relay operates across a temperature range of -55°C to 85°C and features palladium, ruthenium, and gold contact materials suitable for telecom applications.

Substiute Parts

D3523N

TE Connectivity Potter & Brumfield RelaysIn Stock: 1036D3523N Datasheet

Current PartRFQ

TXD2SS-5V

Panasonic Electric WorksIn Stock: 978TXD2SS-5V Datasheet

DirectRFQ

TXD2SS-5V-Z

Panasonic Electric WorksIn Stock: 967TXD2SS-5V-Z Datasheet

DirectRFQ

TX2SS-5V

Panasonic Electric WorksIn Stock: 906TX2SS-5V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3523N is determined by strict equivalence across the following critical parameters: coil voltage (5VDC), contact form (DPDT), contact rating (2A), mounting type (surface mount), termination style (gull wing), coil type (non-latching), and coil resistance (125 Ohms). All substitute parts must maintain these electrical and mechanical specifications to ensure functional compatibility within existing circuit designs.

The substitute parts are grouped into two categories:

Direct Substitutes (Electrical and Mechanical Equivalence): TXD2SS-5V and TXD2SS-5V-Z from Panasonic Electric Works meet all critical parameters with identical coil voltage, contact form, contact rating, coil current, coil resistance, and termination style. These parts differ only in packaging format (Tube versus Tape & Reel) and product classification (General Purpose versus Telecom), with both maintaining active product status and RoHS compliance.

Similar Substitute (Functional Equivalence with Parameter Variations): TX2SS-5V from Panasonic Electric Works maintains coil voltage, contact form, contact rating, mounting type, and termination style but operates with reduced coil current (28.1 mA versus 40 mA) and increased coil resistance (178 Ohms versus 125 Ohms). This part is classified as a telecom relay and carries active product status with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: TXD2SS-5V and TXD2SS-5V-Z are functionally equivalent to the D3523N across all critical electrical parameters. Both parts maintain active product status, ensuring long-term availability and supply chain stability. Selection between these two options depends on packaging requirements: TXD2SS-5V is supplied in Tube packaging, while TXD2SS-5V-Z is supplied in Tape & Reel format for automated assembly processes. Both parts carry RoHS compliance certifications suitable for modern manufacturing standards.

For Applications with Relaxed Temperature Requirements: TX2SS-5V operates within a reduced temperature range (-40°C to 85°C versus -55°C to 85°C) and exhibits lower coil current consumption (28.1 mA versus 40 mA) with increased coil resistance (178 Ohms versus 125 Ohms). This part maintains telecom relay classification and active product status with ROHS3 compliance. Selection of TX2SS-5V is appropriate for applications where the lower operating temperature limit of -40°C is acceptable and where reduced coil current provides design advantages.

Compliance Considerations: All substitute parts maintain RoHS compliance. TXD2SS-5V and TX2SS-5V carry ROHS3 certification with REACH Unaffected status, indicating compliance with current environmental regulations. The D3523N, while RoHS Compliant, is obsolete and should be replaced in new designs.

Frequently Asked Questions (FAQ)

Q: Can TXD2SS-5V directly replace D3523N in existing designs?

A: Yes. TXD2SS-5V maintains electrical equivalence across coil voltage (5VDC), contact form (DPDT), contact rating (2A), coil current (40 mA), coil resistance (125 Ohms), and all switching parameters. The part operates with identical must-operate and must-release voltages. Operate and release times are faster (4 ms versus 5 ms), which is compatible with existing circuit timing. Surface mount gull wing termination matches the original package footprint.

Q: What is the difference between TXD2SS-5V and TXD2SS-5V-Z?

A: Both parts are electrically identical. The difference is packaging format: TXD2SS-5V is supplied in Tube packaging for manual handling and small-volume applications, while TXD2SS-5V-Z is supplied in Tape & Reel format for automated pick-and-place assembly. Selection depends on manufacturing process requirements.

Q: Why does TX2SS-5V have different coil current and resistance specifications?

A: TX2SS-5V operates with 28.1 mA coil current and 178 Ohms coil resistance, compared to 40 mA and 125 Ohms for the D3523N. These differences reflect design variations in the TX series relay architecture. Despite these variations, the part maintains functional compatibility through identical coil voltage, contact form, contact rating, and switching parameters. The reduced coil current may provide power consumption benefits in applications where the lower operating temperature limit (-40°C minimum) is acceptable.

Q: Is the operating temperature range difference significant?

A: The D3523N operates from -55°C to 85°C, while all substitute parts operate from -40°C to 85°C. The substitute parts have a higher minimum operating temperature by 15°C. For applications requiring operation below -40°C, the D3523N specifications cannot be met by the listed substitutes. For applications within the -40°C to 85°C range, all substitute parts are suitable.

Q: What contact material differences exist between the original and substitutes?

A: The D3523N uses Palladium (Pd), Ruthenium (Ru), and Gold (Au) contact materials. All substitute parts use Silver (Ag) and Gold (Au) contact materials. Both material compositions are suitable for general switching applications. Contact material selection does not prevent substitution for standard telecom relay applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. TXD2SS-5V carries ROHS3 Compliant certification, TXD2SS-5V-Z carries RoHS Compliant certification, and TX2SS-5V carries ROHS3 Compliant certification. All parts meet current environmental compliance requirements for electronic component manufacturing and assembly.

Q: What is the significance of "Sealed - Fully" seal rating on substitute parts?

A: The substitute parts from Panasonic Electric Works are specified as "Sealed - Fully," indicating complete environmental sealing of the relay contacts and coil assembly. This specification is not provided for the D3523N. Full sealing provides enhanced protection against moisture and contaminants, which is beneficial for reliability in telecom and general-purpose applications.