PSD2425G Equivalent & Substitute Parts

Part Overview

The PSD2425G is a solid-state relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (1 Form A) device in a hockey puck package. It provides AC output switching with a 12A load capacity at 90-280V, controlled by a 3-32VDC input signal. The product is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for maintenance, repair, and legacy system support where continued availability of the original component cannot be guaranteed.

Substiute Parts

PSD2425G

Sensata-CrydomIn Stock: 816PSD2425G Datasheet

Current PartRFQ

SSRT-240D25

TE Connectivity Potter & Brumfield RelaysIn Stock: 1216SSRT-240D25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSD2425G is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching logic
• Package / Case: Must be Hockey Puck to ensure mechanical compatibility with existing mounting hardware
• Termination Style: Must be Screw Terminal for direct connection compatibility
• Mounting Type: Must be Chassis Mount to fit existing installation footprints
• Input Voltage Range: Must accommodate 3-32VDC control signals
• Output Type: Must be AC to match load requirements
• Load Current Capacity: Must be equal to or greater than 12A to handle existing circuit loads
• Load Voltage Range: Must encompass or exceed 90-280V to cover all operating conditions

The SSRT-240D25 meets all these criteria. It maintains identical circuit configuration, package, termination, and mounting specifications while providing enhanced load current capacity (25A) and a lower minimum load voltage threshold (24V instead of 90V), making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The SSRT-240D25 is the qualified substitute for the PSD2425G based on the following factors:

Functional Equivalence: Both devices share identical circuit topology (SPST-NO), input voltage range (3-32VDC), package form factor (Hockey Puck), and termination method (Screw Terminal). The SSRT-240D25 maintains full compatibility with existing control and load circuits.

Enhanced Specifications: The SSRT-240D25 provides superior load current capacity (25A vs. 12A) and extends the minimum load voltage threshold to 24V, offering greater operational flexibility without compromising the original design intent.

Compliance Status: The SSRT-240D25 holds active product status with ROHS3 compliance and REACH affiliation, ensuring long-term availability and regulatory alignment. The PSD2425G, marked "Not For New Designs," has limited future supply assurance.

Output Enhancement: The SSRT-240D25 includes zero-cross switching capability, which reduces electromagnetic interference and improves switching performance compared to standard AC output.

Frequently Asked Questions (FAQ)

Q: Can the SSRT-240D25 directly replace the PSD2425G in existing installations?

A: Yes. Both devices are mechanically and electrically compatible. They share identical package geometry (Hockey Puck), mounting configuration (Chassis Mount), termination style (Screw Terminal), and control input specifications (3-32VDC). No modifications to mounting hardware or wiring are required.

Q: What are the differences in load current capacity?

A: The PSD2425G is rated for 12A maximum load current, while the SSRT-240D25 is rated for 25A. The SSRT-240D25 can handle higher current loads without derating. If your application draws less than 12A, both devices operate within their respective ratings.

Q: Does the lower minimum load voltage (24V vs. 90V) on the SSRT-240D25 affect compatibility?

A: No. A lower minimum voltage specification indicates the substitute can operate safely at lower load voltages. Since the original design operates at 90-280V, it falls well within the SSRT-240D25 operating range of 24-280V. This represents an improvement in operational flexibility.

Q: What is zero-cross switching, and does it matter for my application?

A: Zero-cross switching detects when the AC waveform crosses zero volts and switches at that point, reducing electrical noise and stress on connected loads. This is a beneficial feature that improves relay performance and is transparent to the application circuit.

Q: Are there any compliance or regulatory differences?

A: The SSRT-240D25 holds ROHS3 compliance and REACH affiliation, representing current regulatory standards. The PSD2425G is RoHS Compliant but carries "Not For New Designs" status, indicating it does not meet current product lifecycle requirements. For new installations or long-term system support, the SSRT-240D25 is the preferred choice.

Q: Will the SSRT-240D25 work with my existing control circuit?

A: Yes. Both devices accept identical input voltage ranges (3-32VDC) and use the same control logic (SPST-NO). Your existing control circuit requires no modification.