Phoenix Contact 2834038 General Purpose Relay DPDT 48VDC - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2834038 is a general purpose relay with DPDT (2 Form C) contact configuration, rated for 10A at 48VDC coil voltage. This socketable relay features a diode, lighted indicator, and test button, with non-latching coil operation. The part is currently obsolete, making identification of suitable substitute components essential for system maintenance and new designs requiring equivalent functionality.

Substiute Parts

2834038

Phoenix ContactIn Stock: 11842834038 Datasheet

Current PartRFQ

2903661

Phoenix ContactIn Stock: 9182903661 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 2834038 is determined by the following critical parameters:

• Coil Voltage: Must be 48VDC to ensure direct compatibility with existing control circuits
• Contact Form: Must be DPDT (2 Form C) to maintain switching capability across two independent circuits
• Mounting Type: Must be socketable to fit existing relay sockets without mechanical modification
• Termination Style: Must be plug-in to ensure electrical connection compatibility
• Contact Rating: Must meet or exceed 10A to handle the intended load current
• Switching Voltage: Must support 250VAC and 250VDC maximum ratings
• Coil Type: Must be non-latching to maintain operational behavior

The Phoenix Contact 2903661 satisfies all substitution criteria as an active product with identical coil voltage, contact form, mounting type, and termination style. The contact rating increase from 10A to 12A provides enhanced current capacity while maintaining full backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2903661 is the direct substitute for the obsolete 2834038. Selection is based on the following engineering factors:

Product Status: The 2903661 is an active product with current manufacturing support, whereas the 2834038 is obsolete. This ensures long-term availability and supply chain continuity.

Compliance: The 2903661 meets ROHS3 compliance and REACH unaffected status, providing enhanced environmental and regulatory alignment compared to the RoHS compliant 2834038.

Functional Equivalence: Both relays maintain identical coil voltage (48VDC), contact form (DPDT), mounting configuration (socketable), and termination style (plug-in). The 2903661 provides increased contact rating (12A versus 10A), offering improved current handling capacity without compromising compatibility.

Operating Characteristics: The 2903661 operates within a narrower temperature range (-40°C to 70°C versus -55°C to 70°C) and exhibits a longer release time (14 ms versus 5 ms). These differences are acceptable for most general purpose relay applications where the lower temperature limit of -40°C is sufficient.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2903661 directly replace the 2834038 in existing sockets?

A: Yes. Both relays are socketable with identical plug-in termination, allowing direct mechanical and electrical replacement without socket modification.

Q: What is the significance of the increased contact rating from 10A to 12A?

A: The 2903661 provides 20% higher current capacity, allowing it to handle higher load currents while maintaining the same switching voltage specifications. This is a beneficial upgrade for applications operating near the original 10A limit.

Q: Are there differences in coil current requirements?

A: Yes. The 2903661 requires 22 mA compared to 19 mA for the 2834038. Control circuits must supply adequate current to the coil. Verify that existing power supplies can deliver the additional 3 mA without voltage regulation issues.

Q: How do the operating temperature ranges differ?

A: The 2834038 operates from -55°C to 70°C, while the 2903661 operates from -40°C to 70°C. For applications requiring operation below -40°C, the original part specifications must be maintained. For standard industrial applications, the -40°C minimum is typically sufficient.

Q: What is the difference between Silver (Ag) and Silver Nickel (AgNi) contact materials?

A: Silver Nickel contacts provide improved wear resistance and oxidation resistance compared to pure silver contacts. This enhances contact reliability and extends operational life, particularly in switching applications with frequent contact cycling.

Q: Does the longer release time of the 2903661 affect system performance?

A: The 2903661 has a release time of 14 ms versus 5 ms for the 2834038. For applications requiring rapid relay de-energization, this difference must be evaluated against system timing requirements. Most general purpose relay applications tolerate this variance.

Q: Are both relays RoHS compliant?

A: Yes. The 2834038 is RoHS compliant, and the 2903661 is ROHS3 compliant, meeting current environmental standards for electronic components.