Phoenix Contact 2903336 Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2903336 is a general purpose relay with SPDT (Single Pole Double Throw) contact configuration, rated for 50 mA at 120VAC coil voltage. This relay is designed for DIN rail mounting and includes integrated features such as a lighted indicator, socket, and varistor protection. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component procurement.

Substiute Parts

2903336

Phoenix ContactIn Stock: 8292903336 Datasheet

Current PartRFQ

2903328

Phoenix ContactIn Stock: 10072903328 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 2903336 is determined by the following critical parameters:

• Coil Voltage: 120VAC (must match exactly for direct replacement)
• Mounting Type: DIN Rail (physical form factor requirement)
• Coil Current: 8 mA (power consumption specification)
• Contact Rating: 50 mA (switching capacity)
• Switching Voltage: 30VAC, 36VDC - Max (electrical stress limits)
• Operating Temperature: -40°C ~ 50°C (environmental operating range)
• Termination Style: Spring Terminal (connection method)
• Series Compatibility: RIF series (Phoenix Contact product line)

The Phoenix Contact 2903328 shares identical electrical specifications for coil voltage, coil current, contact rating, switching voltage, operating temperature, and termination style. The primary difference is the contact form configuration: the 2903328 provides DPDT (2 Form C) instead of SPDT (1 Form C), offering additional switching capability while maintaining all other critical parameters.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2903328 is the direct functional equivalent for the obsolete 2903336. Both relays share identical electrical specifications including coil voltage (120VAC), coil current (8 mA), contact rating (50 mA), switching voltage limits (30VAC, 36VDC - Max), and operating temperature range (-40°C ~ 50°C).

The 2903328 is currently in active production status with ROHS3 compliance certification, whereas the 2903336 is obsolete. For new designs or system replacements, the 2903328 is the appropriate selection. The contact form difference (DPDT vs. SPDT) provides additional switching flexibility in the substitute part without compromising compatibility with the original 120VAC coil voltage and DIN rail mounting requirements.

Both parts utilize identical termination methods (spring terminal), feature sets (lighted indicator, socket, varistor), and contact materials (Silver Nickel and Gold), ensuring mechanical and electrical interchangeability within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2903328 directly replace the 2903336 in existing installations?

A: The 2903328 shares all critical electrical parameters with the 2903336, including 120VAC coil voltage, 8 mA coil current, 50 mA contact rating, and identical operating temperature range. Both use spring terminal connections and DIN rail mounting. The primary difference is the contact configuration: the 2903328 provides DPDT (2 Form C) versus the original SPDT (1 Form C). Direct replacement is possible if the circuit design accommodates the additional contact set.

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

A: SPDT (Single Pole Double Throw) provides one independent switch with two positions. DPDT (Double Pole Double Throw) provides two independent switches, each with two positions. The 2903328 offers greater switching capability. If the original circuit requires only single-pole switching, the additional contacts in the 2903328 remain unused but do not affect operation.

Q: Are there packaging differences between these parts?

A: The 2903336 is specified with "-" packaging notation, while the 2903328 is supplied in bulk packaging. Both are DIN rail mounted components. Packaging differences do not affect electrical or mechanical compatibility.

Q: What compliance certifications apply to these relays?

A: The 2903336 carries RoHS Compliant certification. The 2903328, as the active production equivalent, carries ROHS3 Compliant certification and is REACH Affected. Both meet current environmental and regulatory standards for electronic components.

Q: Why is the 2903336 classified as obsolete?

A: The 2903336 has been discontinued by Phoenix Contact. The 2903328 represents the current production alternative within the RIF series, offering identical electrical specifications with enhanced regulatory compliance (ROHS3).