CMD48125 Solid State Relay SPST-NO 125A 48-530V Equivalent & Substitute Parts

Part Overview

The CMD48125 is a solid state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 125A load current and 48-530V AC output voltage. This component features a hockey puck form factor with screw terminal connections and zero-cross switching capability. The CMD48125 is classified as not for new designs, making identification of active equivalent parts essential for ongoing maintenance, repair, and legacy system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	CMD48125
Manufacturer	Sensata-Crydom
Circuit Configuration	SPST-NO (1 Form A)
Load Current Rating	125 A
Output Voltage Range	48 V ~ 530 V
Input Voltage Range	4 ~ 32 VDC
Output Type	AC, Zero Cross
Mounting Type	Chassis Mount
Package / Case	Hockey Puck
Termination Style	Screw Terminal
Product Status	Not For New Designs
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the CMD48125 is determined by the following critical parameters:

Circuit Configuration: Must be SPST-NO (1 Form A)
Load Current Rating: Must be 125 A
Output Voltage Range: Minimum 48 V, maximum at least 530 V
Input Voltage Range: 3-32 VDC or 4-32 VDC
Output Type: AC with zero-cross switching
Mounting Type: Chassis Mount
Package / Case: Hockey Puck form factor
Termination Style: Screw Terminal

Three active equivalent parts meet these substitution criteria: CWD48125, HD48125, and 84137180. All three maintain identical circuit configuration, load current rating, mounting type, package form factor, and termination style. Voltage rating differences and product status variations are documented in the parameter comparison table below.

Parameter Comparison

Parameter	CMD48125	CWD48125	HD48125	84137180
Manufacturer	Sensata-Crydom	Sensata-Crydom	Sensata-Crydom	Sensata Technologies
Series	CMD48	CW48	HD48	GN
Circuit Configuration	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)
Load Current Rating	125 A	125 A	125 A	125 A
Output Voltage Range	48 V ~ 530 V	48 V ~ 660 V	48 V ~ 530 V	48 V ~ 660 V
Input Voltage Range	4 ~ 32 VDC	4 ~ 32 VDC	3 ~ 32 VDC	4 ~ 32 VDC
Output Type	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross
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	Not For New Designs	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant
REACH Status	Not specified	REACH Affected	Not specified	REACH Affected
Moisture Sensitivity Level (MSL)	Not Applicable	Not Applicable	Not Applicable	1 (Unlimited)

Engineering Selection Recommendations

CWD48125 is an active equivalent from Sensata-Crydom with extended output voltage range (48-660V vs. 48-530V). This part carries ROHS3 compliance and REACH affected status, making it suitable for applications requiring enhanced environmental compliance. The CWD48125 maintains identical input voltage range, circuit configuration, and mechanical specifications as the CMD48125.

HD48125 is an active equivalent from Sensata-Crydom with input voltage range extended to 3-32VDC (versus 4-32VDC on the CMD48125). This part maintains RoHS compliance and identical output voltage range (48-530V). The HD48125 is recommended for applications requiring lower input voltage threshold operation.

84137180 is an active equivalent from Sensata Technologies with extended output voltage range (48-660V). This part carries ROHS3 compliance and REACH affected status. The 84137180 represents a cross-manufacturer option within the Sensata family of products.

All three substitute parts maintain the critical functional parameters: 125A load current, SPST-NO circuit configuration, AC zero-cross output type, hockey puck form factor, chassis mount configuration, and screw terminal termination. Selection should be based on specific application requirements regarding voltage range, input voltage threshold, and regulatory compliance needs.

Frequently Asked Questions (FAQ)

Q: Can CWD48125 replace CMD48125 in all applications? A: CWD48125 is functionally equivalent for applications operating within the CMD48125 output voltage range (48-530V). The extended voltage rating (48-660V) of CWD48125 provides additional operational margin. Input voltage range, load current, circuit configuration, and mechanical specifications are identical.

Q: What is the difference between HD48125 and CWD48125? A: HD48125 has a lower input voltage threshold (3VDC minimum vs. 4VDC) and maintains the original output voltage range (48-530V). CWD48125 has an extended output voltage range (48-660V). Both are active products with identical load current and circuit configuration.

Q: Is 84137180 compatible with CMD48125 applications? A: 84137180 is functionally compatible. It is manufactured by Sensata Technologies (versus Sensata-Crydom for CMD48125) but maintains identical circuit configuration, load current rating, input voltage range, output type, and mechanical specifications. The extended output voltage range (48-660V) provides additional operational capability.

Q: Why is CMD48125 marked "Not For New Designs"? A: This designation indicates the part is obsolete for new product development. Active equivalents (CWD48125, HD48125, 84137180) should be used for new designs while CMD48125 remains available for legacy system support and repair.

Q: Are there packaging differences between these parts? A: All parts use hockey puck form factor with screw terminal connections and chassis mount configuration. Packaging specifications are consistent across all four parts.

Q: What compliance certifications should I consider for my application? A: CWD48125 and 84137180 carry ROHS3 compliance and REACH affected status. HD48125 and CMD48125 carry RoHS compliance. Select based on your application's regulatory requirements.

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