Phoenix Contact 2903291 Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2903291 is a general purpose relay with DPDT (2 Form C) contact configuration, designed for 24VDC coil operation on DIN rail mounting. This relay features an 11A contact rating, non-latching coil type, and includes integrated diode and lighted indicator functionality with screw terminal termination.

The 2903291 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure continued availability for replacement applications, and support long-term maintenance of installed equipment using this relay series.

Substiute Parts

2903291

Phoenix ContactIn Stock: 10412903291 Datasheet

Current PartRFQ

2903288

Phoenix ContactIn Stock: 11502903288 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 2903291 is limited by the following critical parameters:

• Coil Voltage: Must be 24VDC to maintain compatibility with existing control circuits
• Mounting Type: Must be DIN Rail to fit existing installation infrastructure
• Coil Current: Must be 56 mA to ensure proper control signal compatibility
• Coil Type: Must be Non Latching to match operational behavior
• Contact Material: Must be Silver Nickel (AgNi) for electrical performance consistency
• Termination Style: Must be Screw Terminal for mechanical compatibility
• Operating Temperature Range: Must support -40°C ~ 60°C operation
• Features: Must include Diode, Lighted Indicator, and Socket

The Phoenix Contact 2903288 is identified as a substitute part within the RIF series. However, this substitute introduces a critical difference: the contact form changes from DPDT (2 Form C) to 3PDT (3 Form C), and the contact rating decreases from 11A to 10A. These differences restrict substitution to applications where the additional contact pole and reduced current rating are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2903288 is available as an active product within the RIF series, whereas the 2903291 is obsolete. The 2903288 maintains compatibility across all critical electrical and mechanical parameters including coil voltage, coil current, operating temperature range, contact material, and termination style.

The primary design differences are the contact form (3PDT versus DPDT) and contact rating (10A versus 11A). These differences require circuit-level evaluation to determine substitution feasibility.

The 2903288 demonstrates improved compliance status with ROHS3 certification and REACH affected designation, compared to the 2903291's RoHS Compliant status. This makes the 2903288 suitable for applications requiring current regulatory compliance standards.

Frequently Asked Questions (FAQ)

Q: Can the 2903288 directly replace the 2903291 in all applications?

A: Direct replacement is not universal. The 2903288 has a 3PDT contact form (three poles) versus the 2903291's DPDT form (two poles), and a 10A contact rating versus 11A. Substitution is only valid when the application circuit can accommodate the additional contact pole and the 10A current rating is sufficient for the load.

Q: What is the significance of the contact form difference between DPDT and 3PDT?

A: DPDT (2 Form C) provides two independent changeover contacts. 3PDT (3 Form C) provides three independent changeover contacts. Applications using only two poles can operate with the 3PDT relay, but the third pole will be unused. Applications requiring exactly two poles with no additional functionality can use the 3PDT as a substitute.

Q: Does the 1A reduction in contact rating affect compatibility?

A: The contact rating reduction from 11A to 10A must be evaluated against the actual load current in the application. If the application load current is 10A or less, the 2903288 is suitable. If the application requires current above 10A, the 2903288 is not appropriate.

Q: Are the coil specifications identical between these relays?

A: Yes. Both relays operate on 24VDC coil voltage, draw 56 mA coil current, have 429 Ohms coil resistance, and feature non-latching coil type. Control circuit compatibility is maintained.

Q: What is the packaging difference between these parts?

A: The 2903291 is listed with "-" packaging designation. The 2903288 is supplied in Bulk packaging. Verify packaging requirements for your procurement and inventory management processes.

Q: Does the improved RoHS status of the 2903288 affect electrical performance?

A: No. ROHS3 compliance is a regulatory and environmental standard that does not alter the electrical or mechanical performance characteristics of the relay. It indicates the 2903288 meets current environmental compliance requirements.