Phoenix Contact 2903283 General Purpose Relay - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2903283 is a general purpose relay featuring a 3PST-NO (3 Form A) contact configuration with 120VAC coil voltage and 8A contact rating. This DIN rail-mounted relay is designed for industrial control applications requiring multiple independent normally-open switching circuits. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance and replacement applications.

Substiute Parts

2903283

Phoenix ContactIn Stock: 10902903283 Datasheet

Current PartRFQ

2903287

Phoenix ContactIn Stock: 9382903287 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2903287 qualifies as a substitute based on the following matching electrical and mechanical parameters:

Matching Parameters:

• Manufacturer: Phoenix Contact (same manufacturer ensures design compatibility)
• Series: RIF (same relay series maintains mechanical and electrical compatibility)
• Mounting Type: DIN Rail (identical form factor for panel integration)
• Coil Voltage: 120VAC (identical coil specification)
• Coil Current: 24 mA (identical coil drive requirements)
• Contact Rating: 8 A (identical current-carrying capacity)
• Switching Voltage: 440VAC, 250VDC - Max (identical voltage withstand capability)
• Coil Type: Non Latching (identical operational behavior)
• Operate Time: 25 ms (identical response timing)
• Release Time: 20 ms (identical release timing)
• Operating Temperature: -40°C ~ 40°C (identical thermal operating range)
• Contact Material: Silver Nickel (AgNi) (identical contact composition)
• Coil Resistance: 5 kOhms (identical electrical impedance)
• Termination Style: Screw Terminal (identical connection method)
• Socket Included: Yes (identical accessory provision)

Distinguishing Parameter:

• Contact Form: 2903287 provides 3PDT (3 Form C) versus 2903283's 3PST-NO (3 Form A)

The 3PDT configuration provides additional switching flexibility with changeover contacts (each pole has both normally-open and normally-closed positions) compared to the 3PST-NO configuration (each pole has only normally-open positions). This represents an enhancement in functionality while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2903287 is the designated substitute for the obsolete 2903283. Selection is based on the following engineering criteria:

Product Status Alignment: The 2903287 is an active product with current manufacturing support, whereas the 2903283 is obsolete. This ensures long-term availability and supply chain continuity for replacement and new installations.

Compliance Enhancement: The 2903287 meets ROHS3 compliance and is REACH Affected, representing current regulatory standards. The 2903283 meets RoHS Compliant status. Both meet the ECCN EAR99 classification.

Electrical and Mechanical Compatibility: All critical electrical parameters (coil voltage, coil current, contact rating, switching voltage, timing characteristics, and operating temperature range) are identical between the two parts. Mechanical compatibility is assured through identical DIN rail mounting, screw terminal configuration, and socket inclusion.

Functional Enhancement: The 2903287 provides 3PDT (Form C) contacts versus the 2903283's 3PST-NO (Form A) contacts. This enhancement allows for changeover switching capability on each pole, providing greater circuit design flexibility while maintaining full backward compatibility for applications requiring only normally-open switching.

Additional Features: The 2903287 includes an integrated varistor, providing enhanced transient protection compared to the base 2903283 specification.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2903287 directly replace the 2903283 in existing installations?

A: Yes. The 2903287 is mechanically and electrically compatible with the 2903283. Both parts share identical DIN rail mounting, coil voltage (120VAC), coil current (24 mA), contact rating (8A), switching voltage capability (440VAC, 250VDC max), and timing characteristics (25 ms operate, 20 ms release). The socket and screw terminal configuration are identical, enabling direct substitution without panel modifications.

Q: What is the functional difference between the 3PST-NO and 3PDT contact configurations?

A: The 2903283 provides 3PST-NO (3 Form A) configuration, meaning each of the three poles has only a normally-open contact. The 2903287 provides 3PDT (3 Form C) configuration, meaning each of the three poles has both normally-open and normally-closed contacts (changeover). Applications requiring only normally-open switching will function identically with either part. Applications requiring changeover capability will require the 2903287.

Q: Are there any packaging differences between these parts?

A: The 2903283 is specified with "-" packaging notation, while the 2903287 is specified as Bulk packaging. Both parts are DIN rail-mounted relays with socket inclusion. Packaging differences do not affect electrical or mechanical compatibility.

Q: What compliance certifications apply to each part?

A: The 2903283 is RoHS Compliant. The 2903287 is ROHS3 Compliant and REACH Affected. Both parts carry ECCN EAR99 classification and HTSUS 8536.49.0050 tariff code. The 2903287 represents current regulatory compliance standards.

Q: Does the integrated varistor in the 2903287 affect circuit design?

A: The varistor in the 2903287 provides transient voltage suppression on the coil circuit, enhancing protection against voltage spikes. This is an additional protective feature that does not negatively impact circuit design and may improve system reliability in environments with electrical noise or switching transients.

Q: What is the coil resistance specification for both parts?

A: Both the 2903283 and 2903287 have a coil resistance of 5 kOhms. This identical specification ensures equivalent coil drive requirements and power consumption characteristics.