Phoenix Contact 2904691 SSR Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2904691 is a solid-state relay (SSR) module with SPST-NO (1 Form A) configuration, designed for DIN rail mounting applications. This component operates with a 120VAC/DC input and delivers DC output switching for loads between 3V and 48V at 100mA capacity. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, redesign, and procurement planning.

Substiute Parts

2904691

Phoenix ContactIn Stock: 10292904691 Datasheet

Current PartRFQ

2908175

Phoenix ContactIn Stock: 7222908175 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 2904691 is determined by the following critical parameters:

• Circuit Configuration: Must maintain SPST-NO (1 Form A) topology
• Output Type: Must be DC output
• Input Voltage: Must accept 120VAC/DC control signal
• Mounting Interface: Must support DIN rail installation
• Termination: Must use screw terminal connection
• Load Current Capacity: Substitute must meet or exceed 100mA requirement
• Load Voltage Range: Substitute range must encompass or overlap the 3V ~ 48V specification

The Phoenix Contact 2908175 qualifies as a direct substitute within the PLC-OSC series, maintaining identical circuit topology, input voltage, mounting method, and termination style. However, the load current specification differs significantly (3mA versus 100mA), and the load voltage range is narrower (5V ~ 30V versus 3V ~ 48V).

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2908175 maintains full compatibility with the mechanical and electrical interface requirements of the 2904691 within the PLC-OSC series framework. Both components are RoHS compliant and utilize identical DIN rail mounting and screw terminal termination methods.

The 2908175 is currently in active production status, whereas the 2904691 is obsolete. Selection of the 2908175 ensures access to current manufacturing support and supply chain availability.

Substitution feasibility depends on application-specific load current and voltage requirements. The 2908175 operates within a narrower load voltage window (5V ~ 30V) and supports significantly lower load current (3mA) compared to the 2904691 specification (100mA). Applications requiring the full 100mA capacity or extended voltage range below 5V or above 30V cannot use the 2908175 as a direct replacement.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2908175 directly replace the 2904691 in all applications?

A: No. While both components share identical circuit topology, input voltage, mounting type, and termination style, the 2908175 has reduced load current capacity (3mA versus 100mA) and a narrower load voltage range (5V ~ 30V versus 3V ~ 48V). Substitution is valid only for applications operating within these reduced specifications.

Q: What is the primary reason for seeking a substitute for the 2904691?

A: The 2904691 is classified as obsolete. The 2908175 is an active product within the same Phoenix Contact PLC-OSC series, ensuring continued availability and manufacturing support.

Q: Are both parts mechanically compatible with existing DIN rail installations?

A: Yes. Both the 2904691 and 2908175 are designed for DIN rail mounting and use screw terminal connections, ensuring mechanical and electrical interface compatibility.

Q: What load current applications are suitable for the 2908175?

A: The 2908175 is rated for 3mA load current. Applications requiring 100mA switching capacity must use the original 2904691 or identify alternative components with higher current ratings.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 2904691 and 2908175 are RoHS compliant, meeting identical environmental and regulatory requirements.