Phoenix Contact 2940388 SSR Relay SPDT 500MA - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2940388 is a Solid State SPDT (1 Form C) relay module designed for DIN Rail mounting with 24VDC input and 500mA load current capacity. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, redesign, and procurement planning. The part features screw terminal connections and is RoHS compliant with MSL Level 1 rating.

Substiute Parts

2940388

Phoenix ContactIn Stock: 10162940388 Datasheet

Current PartRFQ

2900306

Phoenix ContactIn Stock: 22762900306 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2900306 is identified as a substitute for the 2940388 based on the following alignment of critical parameters:

Matching Parameters:

• Circuit Configuration: Both feature SPDT (1 Form C) contact form
• Mounting Type: Both are DIN Rail mounted modules
• Input/Coil Voltage: Both operate at 24VDC
• Manufacturer: Both are Phoenix Contact products
• RoHS Compliance: Both meet RoHS requirements
• MSL Rating: Both rated MSL 1 (Unlimited)
• ECCN Classification: Both classified as EAR99
• HTSUS Code: Both share 8536.41.0020

Functional Differences: The 2900306 is a general-purpose relay with 50mA contact rating, compared to the 2940388's 500mA solid-state relay design. This represents a significant difference in load-handling capacity and switching technology.

Parameter Comparison

Engineering Selection Recommendations

Active Product Status: The 2900306 holds active product status with Phoenix Contact, ensuring ongoing availability and support, whereas the 2940388 is obsolete. For new designs or long-term system maintenance, the 2900306 represents the current Phoenix Contact offering in the SPDT DIN Rail relay category.

Compliance Alignment: Both parts meet RoHS requirements and share identical ECCN and HTSUS classifications, supporting regulatory and procurement consistency.

Load Current Consideration: The 2900306 is rated for 50mA load current versus the 2940388's 500mA capacity. This represents a tenfold reduction in switching capability and must be evaluated against application requirements.

Switching Technology: The 2940388 employs solid-state switching technology, while the 2900306 is a general-purpose electromechanical relay. These technologies differ in switching speed, noise characteristics, and contact wear patterns.

Terminal Connection: The 2940388 uses screw terminals; the 2900306 uses spring terminals. Physical installation and wiring procedures will differ accordingly.

Frequently Asked Questions (FAQ)

Q: Can the 2900306 directly replace the 2940388 in all applications?

A: Direct replacement depends on load current requirements. The 2900306's 50mA rating is substantially lower than the 2940388's 500mA capacity. Applications requiring the full 500mA switching capability cannot use the 2900306 as a substitute.

Q: What is the significance of the different relay types (solid-state vs. general-purpose)?

A: Solid-state relays (2940388) use semiconductor switching with no moving contacts, while general-purpose relays (2900306) use electromechanical contacts. This affects switching speed, electrical noise, contact resistance, and maintenance requirements.

Q: Are the terminal connections compatible between these parts?

A: No. The 2940388 features screw terminals while the 2900306 uses spring terminals. Wiring harnesses and connection procedures must be adapted accordingly.

Q: Does the 2900306's higher RoHS3 compliance provide additional benefits over the 2940388's RoHS compliance?

A: Both parts meet RoHS requirements. ROHS3 represents a more recent compliance standard iteration. For regulatory purposes, both are acceptable in RoHS-restricted applications.

Q: What is the inventory status for these parts?

A: The 2940388 has 995 pieces in stock (obsolete status). The 2900306 has 2200 pieces in stock (active status), reflecting its current market availability.

Q: Are there any differences in operating temperature ranges?

A: The 2900306 specifies an operating temperature range of -40°C to 60°C. The 2940388 operating temperature range is not provided in the available specifications.