Phoenix Contact 2903352 General Purpose Relay SPDT 50MA 120V - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2903352 is a general purpose relay with Single Pole Double Throw (SPDT) contact configuration, rated for 50 mA at 120VAC coil voltage. This DIN rail-mounted relay features a lighted indicator, integrated socket, and varistor protection. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance and new designs requiring equivalent functionality.

Substiute Parts

2903352

Phoenix ContactIn Stock: 7282903352 Datasheet

Current PartRFQ

2903344

Phoenix ContactIn Stock: 11952903344 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 2903352 is constrained by the following critical parameters:

• Coil Voltage: 120VAC (exact match required)
• Contact Form: SPDT (1 Form C) configuration
• Contact Rating: 50 mA minimum
• Mounting Type: DIN Rail
• Switching Voltage: 30VAC, 36VDC maximum
• Coil Current: 8 mA
• Operating Temperature: -40°C ~ 50°C
• Termination Style: Screw Terminal

The identified substitute part, Phoenix Contact 2903344, shares identical electrical specifications for coil voltage, coil current, switching voltage, operating temperature, and termination style. However, the 2903344 features a DPDT (2 Form C) contact configuration instead of SPDT. This represents a functional upgrade in contact capability while maintaining all other critical parameters. The 2903344 is currently in active production status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2903344 is the appropriate substitute for the obsolete 2903352 based on the following factors:

Electrical Compatibility: Both relays operate at identical coil voltage (120VAC), coil current (8 mA), and switching voltage specifications (30VAC, 36VDC maximum). Timing characteristics (12 ms operate, 20 ms release) and contact material (Silver Nickel) are identical.

Mechanical Compatibility: Both components utilize DIN rail mounting with screw terminal termination, ensuring direct installation compatibility in existing enclosures and control panels.

Regulatory Compliance: The 2903344 meets ROHS3 compliance, representing an advancement over the original RoHS compliance of the 2903352. Both components carry EAR99 ECCN classification and identical HTSUS codes.

Availability: The 2903344 is in active production status with confirmed inventory, whereas the 2903352 is obsolete. This ensures long-term supply chain reliability for new designs and system replacements.

Contact Configuration Consideration: The primary difference is the contact form upgrade from SPDT (1 Form C) to DPDT (2 Form C). This provides additional switching capability without requiring changes to coil drive circuitry or power supply specifications.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2903344 directly replace the 2903352 in existing installations?

A: Direct mechanical and electrical replacement is possible for applications requiring only single pole switching. The 2903344 provides two independent Form C contacts, allowing flexible configuration. Existing wiring to a single contact pair will function identically to the original SPDT configuration.

Q: What is the difference between SPDT and DPDT contact forms?

A: SPDT (Single Pole Double Throw) provides one changeover contact with three terminals. DPDT (Double Pole Double Throw) provides two independent changeover contacts with six terminals. The 2903344 offers twice the switching capability while maintaining identical coil and timing specifications.

Q: Are there any compliance differences between the 2903352 and 2903344?

A: The 2903344 meets ROHS3 compliance, which supersedes the RoHS compliance of the 2903352. Both components are EAR99 classified and share identical HTSUS tariff codes. The 2903344 is additionally REACH Affected, reflecting current regulatory requirements.

Q: What are the critical parameters for substitution compatibility?

A: Substitution requires matching coil voltage (120VAC), coil current (8 mA), switching voltage rating (30VAC, 36VDC maximum), contact current rating (50 mA minimum), mounting type (DIN Rail), and operating temperature range (-40°C ~ 50°C). Contact form may be upgraded from SPDT to DPDT without affecting coil drive requirements.

Q: Is the 2903344 available in the same packaging as the 2903352?

A: The 2903352 was supplied in standard packaging, while the 2903344 is available in bulk packaging. Both utilize identical DIN rail mounting hardware and screw terminal connections, ensuring compatibility with existing panel layouts and installation procedures.