Phoenix Contact 2903305 General Purpose Relay - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2903305 is a general purpose relay featuring 4PDT (4 Form C) contact configuration with 120VAC coil voltage and 5A contact rating. This DIN rail-mounted relay is designed for industrial control applications requiring multiple independent switching circuits. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring functional interchangeability in existing circuit designs.

Substiute Parts

2903305

Phoenix ContactIn Stock: 11442903305 Datasheet

Current PartRFQ

2909740

Phoenix ContactIn Stock: 8322909740 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2909740 is identified as a parametric equivalent to the 2903305 based on the following critical substitution criteria:

• Contact configuration: Both parts feature identical 4PDT (4 Form C) contact form
• Coil voltage: Both operate at 120VAC
• Contact current rating: Both rated at 5A
• Maximum switching voltage: Both support 250VAC and 250VDC
• Coil current: Both draw 13 mA
• Coil type: Both are non-latching designs
• Mounting: Both are DIN rail-mounted
• Termination: Both use spring terminal connections
• Operating temperature: Both function across -40°C to 50°C
• Contact material: Both use Silver Nickel (AgNi)
• Timing characteristics: Both have 15 ms operate time and 20 ms release time
• Compliance: Both are RoHS3 compliant

These parameters define the functional and electrical interchangeability of the substitute part within the same application context.

Parameter Comparison

Engineering Selection Recommendations

Both the 2903305 and 2909740 are active production parts with full RoHS3 compliance and equivalent electrical specifications. Selection between these parts should be based on availability and inventory status. The 2903305 currently maintains higher inventory levels (1045 pcs) compared to the 2909740 (790 pcs). Both parts meet industrial control application requirements with identical functional parameters and regulatory compliance certifications. The REACH status difference (2903305 is REACH Unaffected; 2909740 is REACH Affected) should be evaluated based on end-use application geography and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2909740 directly replace the 2903305 in existing installations?

A: Yes. Both parts share identical electrical specifications including coil voltage, contact configuration, current rating, and switching characteristics. Direct substitution is supported without circuit modification.

Q: Are there differences in physical dimensions or mounting between these parts?

A: Both parts use DIN rail mounting with spring terminal connections. No mechanical adaptation is required for substitution.

Q: What is the significance of the REACH status difference?

A: The 2903305 is REACH Unaffected while the 2909740 is REACH Affected. This distinction relates to regulatory substance compliance requirements. Selection should align with end-use application location and applicable regulations.

Q: Do both parts include the same features?

A: Yes. Both include lighted indicator, socket, and varistor features as standard.

Q: What is the coil resistance specification for the 2909740?

A: The 2909740 has a coil resistance of 9.23 kOhms, which is consistent with the 13 mA coil current specification shared by both parts.

Q: Are there any timing differences between these relays?

A: No. Both parts have identical operate time (15 ms) and release time (20 ms) specifications.