TD2425 Solid State Relay SPST-NO 25A 24-280V Equivalent & Substitute Parts

Part Overview

The TD2425 is a Solid State Relay (SSR) with SPST-NO (1 Form A) configuration, rated for 25A load current and 24-280V output voltage range. This hockey puck-style relay operates with 3-32VDC input and features zero-cross switching for AC loads. The TD2425 is classified as Last Time Buy, making equivalent and substitute parts necessary for continued system support and procurement planning.

Key Parameters

Parameter	Value
Circuit Configuration	SPST-NO (1 Form A)
Load Current Rating	25 A
Output Voltage Range	24 V ~ 280 V
Input Voltage Range	3 ~ 32 VDC
Output Type	AC, Zero Cross
Mounting Type	Chassis Mount
Termination Style	Screw Terminal
Package / Case	Hockey Puck
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TD2425 is determined by the following critical parameters:

Circuit Configuration: Must be SPST-NO (1 Form A)
Load Current Rating: Must be 25 A minimum
Output Voltage Range: Must cover 24 V ~ 280 V
Input Voltage Range: Must support 3 ~ 32 VDC operation
Package / Case: Must be Hockey Puck form factor
Termination Style: Must be Screw Terminal
Mounting Type: Must be Chassis Mount

Parts are classified as Direct Substitutes when all parameters match exactly. Parts are classified as Similar when one or more parameters deviate within acceptable engineering tolerances for the application.

Parameter Comparison

Part Number	Manufacturer	Series	Input Voltage	Output Voltage	Load Current	Output Type	Product Status	RoHS Status	Inventory
TD2425	Sensata-Crydom	T	3 ~ 32 VDC	24 V ~ 280 V	25 A	AC, Zero Cross	Last Time Buy	ROHS3 Compliant	1035 Pcs
D2425	Sensata-Crydom	1	3 ~ 32 VDC	24 V ~ 280 V	25 A	AC, Zero Cross	Active	ROHS3 Compliant	2770 Pcs
84134910	Sensata-Crydom	GNA5	3 ~ 32 VDC	24 V ~ 280 V	25 A	AC	Active	ROHS3 Compliant	636 Pcs
84137910N	Crouzet	GNA	4 ~ 32 VDC	24 V ~ 280 V	25 A	AC, Zero Cross	Active	RoHS Compliant	660 Pcs
SSR-240D25	TE Connectivity Potter & Brumfield Relays	SSR	3 ~ 32 VDC	24 V ~ 280 V	25 A	AC, Zero Cross	Active	ROHS3 Compliant	7366 Pcs
SSRT-240D25	TE Connectivity Potter & Brumfield Relays	SSRT	3 ~ 32 VDC	24 V ~ 280 V	25 A	AC, Zero Cross	Active	ROHS3 Compliant	1106 Pcs
ASR-SI240D25ZW-L	Altran Magnetics, LLC	SI	4 ~ 32 VDC	48 V ~ 280 V	25 A	AC, Zero Cross	Active	ROHS3 Compliant	691 Pcs

Engineering Selection Recommendations

Direct Substitutes (Recommended Priority Order)

D2425 (Sensata-Crydom): Identical electrical specifications to TD2425 with matching input/output voltage ranges and zero-cross switching. Active product status with highest inventory availability (2770 Pcs). ROHS3 compliant. Preferred choice for direct replacement.
SSR-240D25 (TE Connectivity Potter & Brumfield Relays): Matches all critical parameters including 3-32VDC input, 24-280V output, and AC zero-cross switching. Active status with substantial inventory (7366 Pcs). ROHS3 compliant.
SSRT-240D25 (TE Connectivity Potter & Brumfield Relays): Identical specifications to SSR-240D25 with active product status and ROHS3 compliance. Inventory of 1106 Pcs available.

Similar Substitutes (Parameter Deviations)

84134910 (Sensata-Crydom): Matches voltage and current ratings but output type is AC without zero-cross specification. Active status with ROHS3 compliance. Suitable where zero-cross switching is not required.
84137910N (Crouzet): Input voltage minimum raised to 4VDC (vs. 3VDC). Output voltage and current ratings match. AC zero-cross switching maintained. Active status. RoHS compliant. Acceptable where minimum input voltage of 4VDC is compatible with system design.
ASR-SI240D25ZW-L (Altran Magnetics, LLC): Input voltage minimum raised to 4VDC. Output voltage range begins at 48V (vs. 24V minimum). Load current and zero-cross switching match. Active status with ROHS3 compliance. Suitable only for applications where minimum load voltage is 48V or higher.

Frequently Asked Questions (FAQ)

Q: Can D2425 directly replace TD2425?

A: Yes. D2425 is a direct substitute with identical electrical specifications: 3-32VDC input, 24-280V output, 25A load current, AC zero-cross switching, and hockey puck package with screw terminals. Both are Sensata-Crydom products with ROHS3 compliance.

Q: What is the difference between SSR-240D25 and SSRT-240D25?

A: Both are TE Connectivity products with identical electrical specifications and performance characteristics. The difference is series designation (SSR vs. SSRT). Both are active products with ROHS3 compliance and suitable for direct substitution of TD2425.

Q: Why is 84134910 listed as a similar substitute rather than direct?

A: The 84134910 specifies output type as AC without zero-cross notation, whereas TD2425 includes zero-cross switching. This represents a functional difference in switching behavior. Use 84134910 only if zero-cross switching is not required by the application.

Q: Can ASR-SI240D25ZW-L be used in all TD2425 applications?

A: No. ASR-SI240D25ZW-L has a minimum output voltage of 48V, whereas TD2425 operates from 24V. This part is suitable only for applications where the load voltage is 48V or higher. Additionally, the input voltage minimum is 4VDC instead of 3VDC.

Q: What does "zero-cross" switching mean in these relays?

A: Zero-cross switching synchronizes relay activation to the zero-crossing point of the AC waveform, reducing electromagnetic interference and switching transients. Parts specified with "AC, Zero Cross" include this feature; parts specified as "AC" only do not.

Q: Are all substitute parts ROHS3 compliant?

A: Five of six substitute parts are ROHS3 compliant. The 84137910N (Crouzet) is RoHS compliant but not specifically ROHS3. Verify compliance requirements for your application before selection.

Q: Which substitute has the highest inventory availability?

A: SSR-240D25 from TE Connectivity has the highest inventory with 7366 Pcs available, followed by D2425 with 2770 Pcs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message