D3227 Telecom Relay DPDT 2A 24V Equivalent & Substitute Parts

Part Overview

The D3227 is a telecom-grade double-pole double-throw (DPDT) relay manufactured by TE Connectivity Potter & Brumfield Relays, designed for 24VDC coil operation with 2A contact rating. This component operates at switching voltages up to 250VAC and 220VDC, featuring through-hole PC pin termination suitable for printed circuit board assembly.

The D3227 carries an obsolete product status, necessitating identification of functionally equivalent alternatives for ongoing system support and new design implementations. Substitute components must maintain electrical compatibility across coil voltage, contact form, current rating, and switching voltage parameters while accommodating available packaging and supply chain options.

Substiute Parts

D3227

TE Connectivity Potter & Brumfield RelaysIn Stock: 1034D3227 Datasheet

Current PartRFQ

TX2-24V

Panasonic Electric WorksIn Stock: 3648TX2-24V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D3227 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Coil voltage: 24VDC (exact match required)
• Contact form: DPDT (2 Form C) configuration
• Contact rating: 2A minimum
• Coil current: 5.8 mA (matching drive circuit requirements)
• Coil resistance: 4.11 kOhms (ensuring proper circuit operation)
• Operating temperature range: -40°C to 85°C minimum

Mechanical Compatibility Requirements:

• Mounting type: Through hole
• Termination style: PC pin
• Relay type: Telecom grade

Performance Parameters:

• Must operate voltage: 16.8 VDC or lower
• Must release voltage: 2.4 VDC or lower
• Switching voltage capability: 220VDC minimum

The TX2-24V from Panasonic Electric Works meets all critical substitution criteria, maintaining identical coil voltage, contact form, current rating, coil current, coil resistance, and mounting configuration. Switching voltage capability of 220VDC satisfies the minimum requirement, though the D3227 supports an additional 250VAC rating not present in the substitute.

Parameter Comparison

Engineering Selection Recommendations

The TX2-24V from Panasonic Electric Works is the qualified substitute for the obsolete D3227 relay. Selection is based on the following engineering criteria:

Electrical Equivalence: The TX2-24V maintains identical coil voltage (24VDC), contact form (DPDT), contact current rating (2A), coil current (5.8 mA), and coil resistance (4.11 kOhms). These parameters ensure direct functional replacement without circuit redesign.

Mechanical Compatibility: Both relays feature through-hole mounting with PC pin termination, enabling direct printed circuit board substitution without layout modification.

Performance Compatibility: Operating temperature range (-40°C to 85°C) is identical. The TX2-24V must operate voltage of 18VDC is slightly higher than the D3227 specification of 16.8VDC, remaining within acceptable circuit tolerance margins. Release time of 4ms in the TX2-24V compared to 3ms in the D3227 represents a 1ms increase, acceptable for telecom relay applications.

Switching Voltage: The TX2-24V supports 220VDC maximum switching voltage, meeting the minimum requirement. Applications requiring 250VAC switching capability must evaluate alternative substitutes.

Product Status and Compliance: The TX2-24V carries active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory alignment. The D3227 obsolete status necessitates transition to the TX2-24V for new designs and ongoing support.

Seal Rating Enhancement: The TX2-24V provides fully sealed construction compared to the D3227 unspecified seal rating, offering improved environmental protection in applications requiring moisture resistance.

Frequently Asked Questions (FAQ)

Q: Can the TX2-24V directly replace the D3227 in existing circuit designs?

A: Yes. The TX2-24V maintains electrical and mechanical equivalence across all critical parameters: 24VDC coil voltage, DPDT contact form, 2A current rating, 5.8mA coil current, 4.11kOhms coil resistance, through-hole mounting, and PC pin termination. No circuit modifications are required.

Q: What is the difference in switching voltage capability between these relays?

A: The D3227 supports 250VAC and 220VDC maximum switching voltage, while the TX2-24V supports 220VDC maximum. Applications requiring 250VAC switching capability must evaluate alternative substitutes, as the TX2-24V does not support this voltage level.

Q: How do the operating voltage thresholds compare?

A: The D3227 must operate at 16.8VDC minimum, while the TX2-24V requires 18VDC minimum. This 1.2VDC difference is within typical circuit tolerance margins. Both relays release at 2.4VDC maximum, ensuring consistent release behavior.

Q: What is the impact of the 1ms difference in release time?

A: The D3227 releases in 3ms while the TX2-24V releases in 4ms. This 1ms increase is negligible for telecom relay applications and does not affect system performance in standard switching circuits.

Q: Does the TX2-24V provide improved environmental protection?

A: Yes. The TX2-24V features fully sealed construction, providing enhanced moisture and contamination resistance compared to the D3227 unspecified seal rating. This enhancement is beneficial for applications in humid or harsh environments.

Q: What compliance certifications does the TX2-24V carry?

A: The TX2-24V is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components. The D3227 compliance status is not specified.

Q: Are there packaging differences between these relays?

A: The D3227 packaging is unspecified, while the TX2-24V is supplied in tube packaging. Tube packaging is standard for through-hole relay distribution and does not affect component functionality or circuit board installation.

Q: What is the inventory status for each relay?

A: The D3227 carries 925 pieces in stock with obsolete product status, indicating limited future availability. The TX2-24V has 3600 pieces in stock with active product status, ensuring reliable long-term supply for new designs and ongoing applications.