D3503N Equivalent & Substitute Parts

Part Overview

The D3503N is a telecom relay manufactured by TE Connectivity Potter & Brumfield Relays, configured as a DPDT (2 Form C) surface mount component with a 5VDC coil and 2A contact rating. This part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The D3503N operates across a wide temperature range of -55°C to 85°C and features palladium, ruthenium, and gold contact materials suitable for telecom switching applications.

Substiute Parts

D3503N

TE Connectivity Potter & Brumfield RelaysIn Stock: 1132D3503N Datasheet

Current PartRFQ

TX2SS-5V

Panasonic Electric WorksIn Stock: 906TX2SS-5V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3503N is determined by strict equivalence across the following critical parameters:

• Coil Voltage: 5VDC (exact match required)
• Contact Form: DPDT (2 Form C) (exact match required)
• Contact Rating: 2 A minimum (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Termination Style: Gull Wing (exact match required)
• Coil Type: Non Latching (exact match required)
• Must Operate Voltage: 3.75 VDC (exact match required)
• Must Release Voltage: 0.5 VDC (exact match required)

The TX2SS-5V manufactured by Panasonic Electric Works satisfies all mandatory substitution criteria. Both parts operate identically within the specified voltage thresholds, share identical contact form configuration, and maintain equivalent switching characteristics for telecom applications.

Parameter Comparison

Engineering Selection Recommendations

The TX2SS-5V is a direct functional substitute for the D3503N based on equivalence of all mandatory electrical and mechanical parameters. The D3503N is classified as obsolete, while the TX2SS-5V maintains active product status with current manufacturing support.

Both parts satisfy RoHS compliance requirements. The TX2SS-5V carries ROHS3 compliance certification and is REACH unaffected, providing enhanced regulatory documentation for applications requiring extended compliance verification.

The TX2SS-5V demonstrates improved operational characteristics: reduced coil current consumption (28.1 mA versus 60 mA) and faster switching response (4 ms operate and release times versus 5 ms). The substitute part incorporates fully sealed construction, providing enhanced environmental protection compared to the original part specification.

The operating temperature range of the TX2SS-5V extends to -40°C minimum, which is narrower than the D3503N specification of -55°C minimum. Applications requiring operation below -40°C require alternative evaluation.

The maximum switching voltage specification differs: the D3503N supports 250VAC and 220VDC, while the TX2SS-5V supports 220VDC maximum. Applications requiring 250VAC switching capability require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the TX2SS-5V replace the D3503N in existing designs?

A: The TX2SS-5V satisfies all mandatory substitution criteria: identical 5VDC coil voltage, DPDT contact form, 2A contact rating, surface mount configuration, and gull wing termination. Both parts operate within identical voltage thresholds (3.75 VDC must operate, 0.5 VDC must release). Direct substitution is supported for applications within the TX2SS-5V operating temperature range of -40°C to 85°C and maximum switching voltage of 220VDC.

Q: What are the differences in coil current between these parts?

A: The D3503N requires 60 mA coil current, while the TX2SS-5V requires 28.1 mA. The TX2SS-5V consumes approximately 53% less coil current. This difference reflects different coil resistance values: 83.3 Ohms for the D3503N and 178 Ohms for the TX2SS-5V. Circuit designs must accommodate the higher coil resistance of the substitute part.

Q: Are there temperature limitations when substituting?

A: The D3503N operates from -55°C to 85°C, while the TX2SS-5V operates from -40°C to 85°C. Applications requiring operation below -40°C cannot use the TX2SS-5V as a substitute. The upper temperature limit of 85°C is identical for both parts.

Q: What is the difference in switching voltage capability?

A: The D3503N supports maximum switching voltages of 250VAC and 220VDC. The TX2SS-5V supports 220VDC maximum. Applications requiring 250VAC switching capability cannot use the TX2SS-5V. Both parts support 220VDC switching equally.

Q: How do the switching times compare?

A: The TX2SS-5V operates faster than the D3503N. The D3503N has 5 ms operate time and 5 ms release time. The TX2SS-5V has 4 ms operate time and 4 ms release time. The substitute part responds 1 millisecond faster in both directions.

Q: What packaging is available for the TX2SS-5V?

A: The TX2SS-5V is supplied in tube packaging. The D3503N packaging specification is not provided in the available documentation.

Q: Are both parts RoHS compliant?

A: Both parts satisfy RoHS compliance. The D3503N is RoHS Compliant. The TX2SS-5V is ROHS3 Compliant and is REACH unaffected, providing enhanced regulatory documentation.

Q: What is the difference in contact material composition?

A: The D3503N uses palladium (Pd), ruthenium (Ru), and gold (Au) contact materials. The TX2SS-5V uses silver (Ag) and gold (Au) contact materials. Contact material differences may affect performance in specific application environments and require evaluation based on switching load characteristics.

Q: Does the TX2SS-5V offer environmental protection advantages?

A: The TX2SS-5V is specified as sealed with fully sealed construction. The D3503N seal rating is not specified. The sealed construction of the TX2SS-5V provides enhanced protection against moisture and environmental contamination.