Sensata-Crydom A2402 SSR Relay SPST-NO 2A 24-280V Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom A2402 is a solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 2A load current at 24-280V AC output with zero-cross switching. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. Substitute parts maintain the same electrical specifications and mechanical form factor while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Circuit Configuration	SPST-NO (1 Form A)
Output Type	AC, Zero Cross
Input Voltage	90 ~ 280VAC
Load Voltage Range	24 V ~ 280 V
Load Current Rating	2 A
Mounting Type	Chassis Mount
Package / Case	Hockey Puck
Termination Style	Screw Terminal
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the A2402 is determined by the following criteria:

Circuit configuration must remain SPST-NO (1 Form A)
Output type must be AC with zero-cross switching
Input voltage range must support 90 ~ 280VAC
Load voltage range must support 24 V ~ 280 V
Package / case must be Hockey Puck form factor
Termination style must be screw terminal
Mounting type must be chassis mount

The substitute parts listed exceed the 2A load current specification of the A2402, providing higher current capacity within the same electrical and mechanical envelope. All substitutes maintain identical input/output voltage specifications and switching characteristics.

Parameter Comparison

Parameter	A2402 (Main)	84134001	SSR-240A25	SSRT-240A10
Manufacturer	Sensata-Crydom	Sensata Technologies	TE Connectivity Potter & Brumfield Relays	TE Connectivity Potter & Brumfield Relays
Circuit Configuration	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)
Output Type	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross
Input Voltage	90 ~ 280VAC	90 ~ 280VAC	90 ~ 280VAC	90 ~ 280VAC
Load Voltage Range	24 V ~ 280 V	24 V ~ 280 V	24 V ~ 280 V	24 V ~ 280 V
Load Current Rating	2 A	10 A	25 A	10 A
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Package / Case	Hockey Puck	Hockey Puck	Hockey Puck	Hockey Puck
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing status, addressing the obsolescence of the A2402.

84134001 (Sensata Technologies): RoHS compliant with MSL 1 rating. Provides 10A capacity, exceeding the 2A requirement of the A2402 while maintaining identical electrical specifications.

SSR-240A25 (TE Connectivity Potter & Brumfield Relays): Highest current capacity at 25A. RoHS non-compliant status and REACH affected designation should be evaluated against system compliance requirements. Largest inventory availability (1781 pcs).

SSRT-240A10 (TE Connectivity Potter & Brumfield Relays): ROHS3 compliant with MSL 1 rating. Provides 10A capacity matching the Sensata 84134001 option. REACH affected status requires compliance verification.

Selection should prioritize compliance certifications and regulatory status applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can the A2402 be directly replaced with any of these substitute parts?

A: Yes. All substitute parts maintain identical circuit configuration (SPST-NO), output type (AC zero-cross), input voltage range (90-280VAC), load voltage range (24-280V), package form factor (Hockey Puck), and termination style (screw terminal). The substitutes provide equal or greater load current capacity.

Q: What is the significance of the higher current ratings in the substitute parts?

A: The substitute parts (10A and 25A) exceed the 2A specification of the A2402. In applications requiring only 2A, these parts operate within their rated capacity and provide design margin. The identical electrical and mechanical specifications ensure form-fit-function compatibility.

Q: How do RoHS and REACH compliance statuses affect part selection?

A: RoHS and REACH compliance are regulatory requirements dependent on the end application and target market. The 84134001 is RoHS compliant; the SSR-240A25 is RoHS non-compliant; the SSRT-240A10 is ROHS3 compliant. REACH affected status applies to SSR-240A25 and SSRT-240A10. Verify compliance requirements for your specific application before selection.

Q: Are the Hockey Puck packages mechanically interchangeable?

A: Yes. All parts use the Hockey Puck package with chassis mount configuration and screw terminal termination, ensuring mechanical compatibility in existing mounting arrangements.

Q: What does MSL (Moisture Sensitivity Level) indicate?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions during storage and handling. The A2402 lists MSL as Not Applicable. Both 84134001 and SSRT-240A10 are rated MSL 1, providing unrestricted handling conditions.

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