PS7141-1C-A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7141-1C-A is a solid state relay (SSR) manufactured by CEL in the PS/OCMOS series, configured as SPST-NO + SPST-NC with a rated load current of 150 mA and maximum load voltage of 400 V. This part is classified as obsolete, necessitating identification of active equivalent alternatives from current manufacturers to maintain design continuity and ensure component availability for new production builds and field replacements.

Substiute Parts

PS7141-1C-A

CELIn Stock: 893PS7141-1C-A Datasheet

Current PartRFQ

AQW614

Panasonic Electric WorksIn Stock: 1652AQW614 Datasheet

SimilarRFQ

AQW614EH

Panasonic Electric WorksIn Stock: 5937AQW614EH Datasheet

SimilarRFQ

AQW654

Panasonic Electric WorksIn Stock: 2390AQW654 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS7141-1C-A is determined by the following critical parameters: identical circuit configuration (SPST-NO + SPST-NC), compatible package form factor (8-DIP 0.300" 7.62 mm), matching output type capability (AC/DC), and load voltage rating (0 V ~ 400 V). All identified substitute parts maintain these core electrical and mechanical characteristics.

The three active substitute parts from Panasonic Electric Works (AQW614, AQW614EH, and AQW654) meet the fundamental substitution criteria. However, load current ratings differ between the main part and substitutes, ranging from 100 mA to 150 mA, necessitating application-level validation. Input voltage specifications are also lower for substitute parts (1.14 VDC vs. 1.2 VDC main part), which may affect circuit design considerations.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are manufactured by Panasonic Electric Works and are classified as active products, ensuring long-term component availability compared to the obsolete PS7141-1C-A.

The AQW614EH represents the preferred substitute based on RoHS3 compliance and REACH unaffected status, providing regulatory alignment for modern manufacturing requirements. The AQW614 is also RoHS compliant and offers the lowest on-state resistance spread among the 100 mA options. The AQW654 provides the highest load current rating (120 mA) and the lowest on-state resistance (16 Ohms) among all substitutes, offering improved electrical performance in applications where load current headroom is critical.

Selection should prioritize the AQW654 when application load current approaches 150 mA, as it provides the closest electrical performance match. The AQW614EH offers the best regulatory compliance posture for new designs.

Frequently Asked Questions (FAQ)

Q: Can the AQW614 or AQW614EH be used as direct replacements for the PS7141-1C-A?

A: Yes, provided the application load current does not exceed 100 mA. Both parts maintain identical circuit configuration (SPST-NO + SPST-NC), package form factor (8-DIP 0.300" 7.62 mm), and output voltage rating (0 V ~ 400 V). Load current derating is required if the original design utilized the full 150 mA capacity.

Q: What is the significance of the on-state resistance difference between PS7141-1C-A (30 Ohms max) and the substitutes?

A: On-state resistance affects voltage drop across the relay contacts during operation. The AQW654 (16 Ohms max) provides superior electrical performance with lower losses, while the AQW614 and AQW614EH (50 Ohms and 35 Ohms respectively) exhibit higher voltage drop. Circuit validation is required if load current and voltage drop are coupled to system performance.

Q: Are all substitute parts suitable for AC and DC load applications?

A: Yes. All three substitute parts support both AC and DC output types with identical 0 V ~ 400 V load voltage ratings as the original PS7141-1C-A.

Q: How does the input voltage difference (1.2 VDC vs. 1.14 VDC) affect circuit design?

A: The substitute parts require slightly lower input voltage (1.14 VDC) compared to the PS7141-1C-A (1.2 VDC). This represents a 5% reduction in minimum input voltage and should be evaluated against the design's control circuit voltage tolerance and noise margins.

Q: What regulatory certifications differentiate the substitute parts?

A: The AQW614EH carries RoHS3 compliance and REACH unaffected status, offering the most current regulatory alignment. The AQW614 is RoHS compliant. The AQW654 is RoHS compliant but may have different REACH status depending on specific supply chain documentation.