CMA6025 Solid State Relay SPST-NO 25A 48-660V Equivalent & Substitute Parts

Part Overview

The CMA6025 is a solid state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 25A load current across 48V to 660V output range. This component features a hockey puck form factor with screw terminal connections and zero-cross AC output switching. The CMA6025 is classified as obsolete, making identification of active equivalent parts essential for ongoing system support and new designs requiring this relay specification.

Key Parameters

Parameter	Value
Manufacturer	Sensata-Crydom
Circuit Configuration	SPST-NO (1 Form A)
Output Type	AC, Zero Cross
Load Current Rating	25 A
Load Voltage Range	48 V – 660 V
Input Voltage Range	90 – 140 VAC
Package Type	Hockey Puck
Mounting Type	Chassis Mount
Termination Style	Screw Terminal
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the CMA6025 is determined by strict equivalence across the following parameters: SPST-NO circuit configuration, 25A load current rating, 48V–660V load voltage range, AC zero-cross output type, hockey puck package, chassis mount configuration, and screw terminal termination. All substitute parts must maintain these electrical and mechanical specifications without deviation.

The three active substitute parts—84137111, CWA4825, and HA6025—meet these core requirements. However, input voltage ranges differ between the obsolete CMA6025 (90–140 VAC) and the active substitutes (90–280 VAC). This expanded input range in substitute parts represents a design enhancement and does not prevent substitution; systems designed for the original 90–140 VAC input will operate within the substitute parts' broader input specification.

Parameter Comparison

Parameter	CMA6025	84137111	CWA4825	HA6025
Manufacturer	Sensata-Crydom	Sensata-Crydom	Sensata-Crydom	Sensata-Crydom
Series	CMA60	GN	CW48	HA60
Product Status	Obsolete	Active	Active	Active
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
Load Current Rating	25 A	25 A	25 A	25 A
Load Voltage Range	48 V – 660 V	48 V – 660 V	48 V – 660 V	48 V – 660 V
Input Voltage Range	90 – 140 VAC	90 – 280 VAC	90 – 280 VAC	90 – 280 VAC
Package Type	Hockey Puck	Hockey Puck	Hockey Puck	Hockey Puck
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

All three substitute parts—84137111, CWA4825, and HA6025—are active products from Sensata-Crydom with current manufacturing status. Each maintains full electrical and mechanical compatibility with the CMA6025 across load current, voltage ratings, circuit configuration, and package specifications.

The 84137111 carries MSL 1 (Unlimited) moisture sensitivity rating, indicating enhanced environmental stability compared to the CMA6025. The CWA4825 and HA6025 are classified as MSL Not Applicable, matching the original part's moisture handling profile.

All substitute parts are RoHS compliant and carry identical ECCN and HTSUS classifications, ensuring regulatory and trade compliance equivalence. Selection among the three substitutes should be based on series availability, inventory status, and specific system environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can CWA4825, HA6025, or 84137111 directly replace CMA6025 in existing applications?

A: Yes. All three parts maintain identical load current (25A), load voltage range (48V–660V), circuit configuration (SPST-NO), output type (AC zero-cross), package form (hockey puck), and termination style (screw terminal). The expanded input voltage range (90–280 VAC) in substitute parts does not prevent substitution in systems designed for 90–140 VAC input.

Q: What is the significance of the input voltage range difference?

A: The CMA6025 specifies 90–140 VAC input; substitute parts specify 90–280 VAC input. This represents a design enhancement in the substitute parts. Systems operating within the original 90–140 VAC range will function within the substitute parts' broader specification without modification.

Q: Are there differences in moisture sensitivity between the main part and substitutes?

A: The CMA6025 is classified MSL Not Applicable. The 84137111 is MSL 1 (Unlimited), indicating superior moisture resistance. The CWA4825 and HA6025 are MSL Not Applicable, matching the original specification. Selection should account for storage and operational environment requirements.

Q: Do all substitute parts share identical packaging and mounting?

A: Yes. All parts use hockey puck package form factor with chassis mount configuration and screw terminal termination. Physical installation and circuit board layout compatibility is maintained across all substitutes.

Q: What is the product status significance for component selection?

A: The CMA6025 is obsolete; all three substitutes are active products with current manufacturing. Active status ensures ongoing availability, supply chain stability, and manufacturer support for new designs and system maintenance.

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