CMA48125 Equivalent & Substitute Parts

Part Overview

The CMA48125 is a solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 125A load current and 48-530V output voltage range. Manufactured by Sensata-Crydom in the CMA48 series, this component features a hockey puck form factor with screw terminal connections and zero-cross AC output switching. The CMA48125 is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Key Parameters

Parameter	CMA48125 Specification
Circuit Configuration	SPST-NO (1 Form A)
Load Current Rating	125 A
Output Voltage Range	48 V ~ 530 V
Input Voltage Range	90 ~ 140 VAC
Output Type	AC, Zero Cross
Mounting Type	Chassis Mount
Package / Case	Hockey Puck
Termination Style	Screw Terminal
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CMA48125 is determined by the following critical parameters:

Circuit Configuration: Must be SPST-NO (1 Form A)
Load Current Rating: Must be 125 A
Package / Case: Must be Hockey Puck form factor
Mounting Type: Must be Chassis Mount
Termination Style: Must be Screw Terminal
Output Type: Must be AC with Zero Cross switching
RoHS Compliance: Must maintain RoHS Compliant status

Substitute parts are grouped into two categories based on output voltage capability:

Category A (Extended Voltage Range): Parts rated for 48-660V output voltage, providing broader application compatibility while maintaining all other electrical and mechanical specifications.

Category B (Standard Voltage Range): Parts rated for 48-530V output voltage, matching the original CMA48125 voltage specification.

All substitute parts maintain 125A load current capacity, SPST-NO circuit configuration, hockey puck packaging, and screw terminal termination.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Input Voltage	Output Voltage	Load Current	Circuit	Package	RoHS Status
CMA48125	Sensata-Crydom	CMA48	Obsolete	90 ~ 140 VAC	48 ~ 530 V	125 A	SPST-NO	Hockey Puck	RoHS Compliant
84137181	Sensata Technologies	GN	Active	90 ~ 280 VAC	48 ~ 660 V	125 A	SPST-NO	Hockey Puck	RoHS Compliant
CWA48125	Sensata Technologies	CW48	Active	90 ~ 280 VAC	48 ~ 660 V	125 A	SPST-NO	Hockey Puck	RoHS Compliant
HA48125	Sensata-Crydom	HA48	Active	90 ~ 280 VAC	48 ~ 530 V	125 A	SPST-NO	Hockey Puck	RoHS Compliant

Engineering Selection Recommendations

Primary Substitute (Recommended for Direct Replacement): HA48125

The HA48125 is manufactured by Sensata-Crydom, the original equipment manufacturer of the CMA48125. This part maintains identical output voltage range (48-530V), matching the original specification exactly. Active product status ensures long-term availability and supply chain continuity. RoHS compliance is maintained. The expanded input voltage range (90-280VAC versus 90-140VAC) provides enhanced operational flexibility without compromising compatibility.

Alternative Substitutes (Extended Capability): 84137181 and CWA48125

Both parts are active products with RoHS compliance and support extended output voltage range (48-660V). The 84137181 is manufactured by Sensata Technologies with MSL rating of 1 (Unlimited), suitable for moisture-sensitive environments. The CWA48125 is manufactured by Sensata Technologies with no MSL restriction. Both accommodate higher load voltage applications while maintaining 125A current capacity and hockey puck packaging. Input voltage range expands to 90-280VAC.

Compatibility Consideration: All substitute parts maintain identical circuit configuration (SPST-NO), load current rating (125A), package form factor (hockey puck), and termination style (screw terminal). Selection should be based on specific output voltage requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can CWA48125 replace CMA48125 in all applications?

A: CWA48125 is electrically compatible with CMA48125 for applications requiring output voltages up to 530V. The extended 48-660V rating provides additional capability. Both maintain 125A load current, SPST-NO configuration, and hockey puck packaging. Input voltage range differs (90-280VAC versus 90-140VAC), which may affect control circuit design.

Q: What is the difference between 84137181 and CWA48125?

A: Both parts share identical electrical specifications: 125A load current, 48-660V output voltage, 90-280VAC input voltage, SPST-NO circuit, and hockey puck packaging. The primary difference is manufacturer designation and MSL rating. 84137181 carries MSL 1 (Unlimited) rating, while CWA48125 has no MSL restriction. Selection depends on moisture sensitivity requirements and supply availability.

Q: Is HA48125 a direct replacement for CMA48125?

A: HA48125 is the closest functional equivalent. Both are manufactured by Sensata-Crydom and share identical output voltage range (48-530V), load current (125A), circuit configuration (SPST-NO), and hockey puck packaging. HA48125 is active product status, ensuring availability. Input voltage range expands from 90-140VAC to 90-280VAC, which must be evaluated for control circuit compatibility.

Q: Why do substitute parts have higher input voltage ratings?

A: Substitute parts (84137181, CWA48125, HA48125) support 90-280VAC input range compared to CMA48125's 90-140VAC. This represents product evolution and expanded operational capability. Applications requiring only 90-140VAC input will function normally with substitute parts, as they operate within the specified range.

Q: Are all substitute parts RoHS compliant?

A: Yes. CMA48125, 84137181, CWA48125, and HA48125 are all RoHS Compliant, maintaining environmental and regulatory compliance across the substitution group.

Q: What is the significance of product status (Obsolete vs. Active)?

A: CMA48125 is classified as obsolete, indicating discontinued manufacturing and limited future availability. All substitute parts are active products with ongoing production and supply chain support, ensuring long-term component availability for maintenance and new designs.

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