CMD4890 Solid State Relay SPST-NO 90A 48-530V Equivalent & Substitute Parts

Part Overview

The CMD4890 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 90A load current with a 48V to 530V output voltage range. This component operates with zero-cross switching and accepts 4-32VDC input control signals. The CMD4890 is designated as Last Time Buy, indicating production discontinuation. Equivalent and substitute parts are necessary to ensure design continuity and maintain system availability for applications requiring SPST-NO solid state relay functionality in this performance class.

Substiute Parts

CMD4890

Sensata-CrydomIn Stock: 1054CMD4890 Datasheet

Current PartRFQ

84137140

Sensata TechnologiesIn Stock: 85184137140 Datasheet

MFR RecommendedRFQ

CWD4890

Sensata TechnologiesIn Stock: 1116CWD4890 Datasheet

MFR RecommendedRFQ

HD4890

Sensata-CrydomIn Stock: 689HD4890 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMD4890 is determined by the following critical parameters: circuit configuration (SPST-NO), output type (AC with zero-cross switching), mounting type (chassis mount), termination style (screw terminal), and package form factor (hockey puck). Load current capacity and voltage ratings must meet or exceed the original specification to ensure functional compatibility.

The substitute parts listed below maintain the core SPST-NO topology and zero-cross AC switching characteristics. Substitutes are grouped by their electrical performance relative to the CMD4890 baseline:

• Direct Current Rating Match (90A): CWD4890 and HD4890 maintain the 90A load current specification
• Enhanced Current Rating (100A): 84137140 provides increased current capacity with extended voltage range

All substitutes share identical input voltage range (4-32VDC or compatible), chassis mount configuration, screw terminal termination, and hockey puck package form factor.

Parameter Comparison

Engineering Selection Recommendations

CWD4890 is the primary substitute for CMD4890 applications. It maintains identical load current (90A) and input voltage specifications while extending the maximum load voltage to 660V. The CWD4890 carries Active product status with ROHS3 compliance and REACH compliance, ensuring long-term availability and regulatory alignment.

HD4890 provides an alternative with identical electrical ratings to the CMD4890 (90A, 48-530V load voltage). The HD4890 accepts a lower minimum input voltage (3VDC versus 4VDC) and maintains Active product status with ROHS3 and REACH compliance. This part is suitable for applications with marginal input voltage conditions.

84137140 is appropriate for applications requiring enhanced current capacity. Rated at 100A with extended load voltage range (48-660V), this part provides design margin for high-current switching applications. The 84137140 is manufactured by Sensata Technologies under the GN series with Active product status, ROHS3 compliance, and REACH compliance.

All three substitutes are available in active production status, eliminating the supply risk associated with the CMD4890 Last Time Buy designation.

Frequently Asked Questions (FAQ)

Q: Can CWD4890 directly replace CMD4890 in existing designs?

A: Yes. The CWD4890 maintains the same SPST-NO circuit configuration, 90A load current rating, 4-32VDC input range, screw terminal termination, and hockey puck package. The extended load voltage range (660V maximum versus 530V) provides additional design flexibility without compromising compatibility.

Q: What is the difference between HD4890 and CWD4890?

A: Both parts are rated for 90A load current and maintain the same load voltage range as the CMD4890 (48-530V). The HD4890 accepts input voltages as low as 3VDC, compared to 4VDC for CWD4890. The CWD4890 extends the maximum load voltage to 660V. Selection depends on specific input voltage and load voltage requirements.

Q: When should 84137140 be selected instead of the 90A alternatives?

A: The 84137140 is specified for applications requiring 100A load current capacity or when the extended 660V maximum load voltage range is necessary. If the application load current does not exceed 90A and the 530V load voltage range is sufficient, the 90A-rated alternatives (CWD4890 or HD4890) are appropriate.

Q: Are all substitutes compatible with the hockey puck package mounting?

A: Yes. All substitute parts (CWD4890, HD4890, and 84137140) are configured in the hockey puck package form factor with chassis mount configuration and screw terminal termination, ensuring mechanical and electrical interface compatibility.

Q: What compliance certifications apply to the substitute parts?

A: CWD4890, HD4890, and 84137140 all carry ROHS3 compliance. CWD4890 and 84137140 are REACH Affected. HD4890 is also REACH Affected. All parts are classified under ECCN EAR99 for export control purposes.