D3204 Telecom Relay DPDT 2A 4.5V Equivalent & Substitute Parts

Part Overview

The D3204 is a telecom-grade DPDT (Double Pole Double Throw) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 4.5VDC coil operation with 2A contact rating. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations. The relay features through-hole mounting with PC pin termination, palladium, ruthenium, and gold contact materials, and operates across the industrial temperature range of -40°C to 85°C.

Substiute Parts

D3204

TE Connectivity Potter & Brumfield RelaysIn Stock: 908D3204 Datasheet

Current PartRFQ

TXD2-4.5V

Panasonic Electric WorksIn Stock: 768TXD2-4.5V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3204 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Coil voltage: 4.5VDC
• Contact form: DPDT (2 Form C)
• Contact rating: 2 A minimum
• Mounting type: Through Hole
• Termination style: PC Pin
• Operating temperature range: -40°C to 85°C minimum
• Coil type: Non Latching

Allowable Variations:

• Switching voltage rating may differ provided it meets or exceeds application requirements
• Coil current and resistance may vary within acceptable circuit design parameters
• Operate and release times may differ within millisecond tolerances
• Contact material composition may vary provided switching voltage and current ratings are maintained
• Seal rating and compliance certifications may differ based on application environment

The TXD2-4.5V by Panasonic Electric Works satisfies all mandatory matching parameters and qualifies as a direct substitute for the D3204.

Parameter Comparison

Engineering Selection Recommendations

D3204 (TE Connectivity Potter & Brumfield):

• Product Status: Obsolete
• Suitable for: Legacy system maintenance and repair applications where existing inventory is available
• Compliance: EAR99 classification; MSL 1 (Unlimited)

TXD2-4.5V (Panasonic Electric Works):

• Product Status: Active
• Suitable for: New designs, system upgrades, and long-term production support
• Compliance: EAR99 classification; MSL 1 (Unlimited); RoHS3 Compliant; REACH Unaffected
• Advantage: Active product status ensures continued availability and supply chain stability

The TXD2-4.5V is the recommended substitute for new applications and ongoing production requirements. The D3204 remains functionally equivalent for direct replacement in existing systems where component availability permits.

Frequently Asked Questions (FAQ)

Q: Can the TXD2-4.5V directly replace the D3204 in existing circuit designs?

A: Yes. Both relays share identical coil voltage (4.5VDC), contact form (DPDT), current rating (2A), mounting type (through hole), and termination style (PC pin). The TXD2-4.5V operates within the same temperature range and meets the same switching voltage requirements for standard applications.

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

A: The D3204 draws 31.1 mA while the TXD2-4.5V draws 44.4 mA at 4.5VDC. Circuit designs must accommodate the higher current draw of the TXD2-4.5V. This difference reflects variations in coil resistance (D3204: 145 Ohms; TXD2-4.5V: 101 Ohms) and does not affect switching performance.

Q: Are there differences in switching speed?

A: Operate time is identical at 4 ms for both relays. Release time differs slightly: D3204 releases in 3 ms while TXD2-4.5V releases in 4 ms. This 1 ms difference is negligible for most telecom and general-purpose applications.

Q: What is the significance of the must-operate voltage difference?

A: The D3204 operates at 3.15 VDC minimum while the TXD2-4.5V requires 3.38 VDC minimum. In low-voltage supply scenarios, the D3204 provides slightly better performance margin. For standard 4.5VDC supply designs, this difference is not operationally significant.

Q: How do the contact materials differ?

A: The D3204 uses palladium, ruthenium, and gold contacts. The TXD2-4.5V uses silver and gold contacts. Both material compositions support the 2A current rating and 220VDC switching voltage. Contact material selection depends on specific application requirements for corrosion resistance and contact wear characteristics.

Q: What is the packaging difference?

A: The D3204 is supplied in standard packaging (not specified). The TXD2-4.5V is supplied in tube packaging. This affects handling, storage, and automated assembly processes but does not impact electrical or mechanical compatibility.

Q: Why is the TXD2-4.5V recommended for new designs?

A: The TXD2-4.5V carries active product status, ensuring long-term availability and supply chain continuity. It also holds RoHS3 compliance and REACH unaffected status, meeting modern environmental and regulatory requirements. The D3204 is obsolete and subject to inventory depletion.

Q: Are both relays suitable for telecom applications?

A: The D3204 is classified as a telecom relay. The TXD2-4.5V is classified as a general-purpose relay. Both meet the electrical and mechanical requirements for telecom switching applications. The TXD2-4.5V's broader general-purpose classification reflects its suitability across multiple application domains.