40CPV120 Equivalent & Substitute Parts

Part Overview

The 40CPV120 is a solid-state relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (1 Form A) device in a hockey puck package. This component is designed for AC load switching applications with a rated load current of 40 A and an operating voltage range of 90 V to 140 V. The device accepts a 0–5 VDC control input and features screw terminal connections for both control and load circuits.

The 40CPV120 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for applications currently utilizing this component.

Substiute Parts

40CPV120

Sensata-CrydomIn Stock: 72740CPV120 Datasheet

Current PartRFQ

MCPC1250A

Sensata-CrydomIn Stock: 1190MCPC1250A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40CPV120 is determined by the following critical parameters:

• Circuit Configuration: Must remain SPST-NO (1 Form A) to maintain identical switching topology
• Output Type: Must support AC switching
• Control Voltage: Must accept 0–5 VDC input
• Load Voltage Range: Must encompass or exceed the 90 V–140 V operating window
• Load Current Rating: Must meet or exceed 40 A
• Package Type: Must be hockey puck form factor for mechanical compatibility
• Mounting Type: Must be chassis mount
• Termination Style: Must use screw terminals

The MCPC1250A satisfies all substitution criteria. It maintains identical circuit configuration, control voltage, package type, mounting type, and termination style. The load voltage range (48 V–140 V) encompasses the original specification, and the load current rating (50 A) exceeds the 40 A requirement.

Parameter Comparison

Engineering Selection Recommendations

The MCPC1250A is the designated manufacturer-recommended substitute for the 40CPV120. This substitution is supported by:

• Functional Equivalence: Identical SPST-NO circuit configuration and control voltage specification ensure direct functional replacement
• Enhanced Current Capacity: The 50 A rating provides 25% margin above the original 40 A requirement
• Expanded Voltage Range: The 48 V minimum load voltage extends the lower operating boundary, maintaining full compatibility with the original 90 V–140 V specification
• Active Product Status: The MCPC1250A is an active product with current manufacturing support and availability
• Compliance: RoHS compliance certification is provided for the substitute part
• Mechanical Compatibility: Identical package, mounting, and termination specifications ensure direct physical replacement

Frequently Asked Questions (FAQ)

Q: Can the MCPC1250A be used as a direct replacement for the 40CPV120?

A: Yes. The MCPC1250A meets all substitution criteria established for the 40CPV120, including circuit configuration, control voltage, package type, mounting type, and termination style. The enhanced current rating and expanded voltage range provide additional operational margin.

Q: What is the significance of the expanded load voltage range in the MCPC1250A?

A: The MCPC1250A supports a load voltage range of 48 V–140 V, compared to the 40CPV120's 90 V–140 V specification. This expansion does not affect compatibility with the original application, as the original operating window (90 V–140 V) remains fully supported.

Q: Does the proportional control capability of the MCPC1250A affect its use as a substitute?

A: No. The proportional control feature is an additional capability that does not interfere with standard on-off switching operation. Applications using the 40CPV120 in standard switching mode will operate identically with the MCPC1250A.

Q: Are there any mechanical or electrical modifications required for installation?

A: No. The MCPC1250A maintains identical package type (hockey puck), mounting type (chassis mount), and termination style (screw terminal) as the 40CPV120. Installation procedures remain unchanged.

Q: What is the availability status of the MCPC1250A?

A: The MCPC1250A is an active product with current manufacturing support. This ensures long-term availability and supply chain stability compared to the obsolete 40CPV120.