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

Part Overview

The PS7141-1A-A is a SPST-NO (Single Pole Single Throw - Normally Open) solid state relay manufactured by CEL in a 6-DIP (0.300", 7.62mm) through-hole package. This component features a 1.2VDC input voltage, 150mA load current rating, and 0-400V load voltage range with 30 ohms maximum on-state resistance. The part carries obsolete product status, necessitating the identification of active equivalent components that maintain functional and electrical compatibility for new designs or replacement applications.

Key Parameters

Parameter	Value
Manufacturer	CEL
Manufacturer Part Number	PS7141-1A-A
Circuit Configuration	SPST-NO (1 Form A)
Package / Case	6-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Voltage - Input	1.2VDC
Voltage - Load	0 V ~ 400 V
Load Current	150 mA
Output Type	AC, DC
On-State Resistance (Max)	30 Ohms
Termination Style	PC Pin
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution validity for the PS7141-1A-A is determined by compliance with the following critical parameters:

Primary Compatibility Criteria:

Circuit configuration: SPST-NO (1 Form A) required
Package type: 6-DIP (0.300", 7.62mm) for mechanical and electrical pin alignment
Mounting type: Through hole for PCB integration
Termination style: PC Pin for solder compatibility

Electrical Compatibility Criteria:

Load voltage range: Must accommodate 0-400V operation
Load current: Must support or exceed 150mA rating
Output type: Must support both AC and DC loads
Input voltage: Functional operation at or below 1.2VDC (lower thresholds acceptable with design verification)
On-state resistance: Must not exceed 30 ohms (lower values provide improved performance margin)

All substitute components listed maintain identical mechanical packaging and mounting characteristics. Electrical parameters vary to provide alternative performance characteristics within the allowable operating envelope for SPST-NO relay applications.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Input	Voltage - Load	Load Current	On-State Resistance (Max)	Output Type	Product Status	RoHS / REACH Status
PS7141-1A-A	CEL	PS, OCMOS	1.2VDC	0-400V	150mA	30Ω	AC, DC	Obsolete	REACH Affected
AQV254	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-400V	150mA	16Ω	AC, DC	Active	ROHS3 / REACH Unaffected
AQV104	Panasonic Electric Works	PhotoMOS™ AQV	2.3VDC	0-400V	180mA	8Ω	DC	Active	ROHS3 / REACH Unaffected
AQV210	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-350V	130mA	35Ω	AC, DC	Active	RoHS Compliant / REACH Unaffected
AQV210E	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-350V	130mA	35Ω	AC, DC	Active	RoHS Compliant / REACH Unaffected
AQV214	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-400V	120mA	50Ω	AC, DC	Active	ROHS3 / REACH Unaffected
AQV214E	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-400V	120mA	50Ω	AC, DC	Active	ROHS3 / REACH Unaffected
AQV214EH	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-400V	120mA	50Ω	AC, DC	Active	ROHS3 / REACH Unaffected
AQV234	Panasonic Electric Works	PhotoMOS™ AQV	1.14VDC	0-400V	120mA	50Ω	AC, DC	Active	RoHS Compliant
AQV103	Panasonic Electric Works	PhotoMOS™ AQV	2.3VDC	0-250V	300mA	4Ω	DC	Active	RoHS Unaffected
CT130	Coto Technology	COTOMOS™	1.37VDC	0-400V	120mA	30Ω	AC, DC	Active	ROHS3 / REACH Unaffected

Engineering Selection Recommendations

Primary Recommendation: AQV254

The AQV254 represents the closest functional equivalent to the PS7141-1A-A. Both components share identical 150mA load current rating and 0-400V load voltage range. The AQV254 offers superior on-state resistance performance (16Ω versus 30Ω), lower input voltage threshold (1.14VDC), dual AC/DC output capability, and active product status with ROHS3 compliance and REACH unaffected certification. This component provides direct functional compatibility with electrical performance margin improvement.

Secondary Option: AQV214 / AQV214E / AQV214EH

These Panasonic PhotoMOS™ variants provide 0-400V load voltage operation matching the original specification. Load current is rated at 120mA, which is 80% of the PS7141-1A-A requirement. These components feature 1.14VDC input voltage, dual AC/DC output support, and ROHS3 compliance. Selection of these alternatives is appropriate for applications where 120mA current handling is sufficient.

Alternative for 350V Applications: AQV210 / AQV210E

These variants operate at 0-350V load voltage with 130mA current handling. Input voltage is 1.14VDC with on-state resistance of 35Ω, placing resistance performance within the original specification. These components are suitable for applications not requiring full 400V operation.

Mechanical Compatibility Note: CT130

The Coto Technology CT130 maintains SPST-NO configuration, 6-DIP package, 0-400V operation, and 30Ω on-state resistance identical to the original part. Input voltage is 1.37VDC. Load current rating is 120mA. This component provides mechanical and electrical interface compatibility with active product status and ROHS3 compliance.

Not Recommended: AQV103

The AQV103 deviates from core compatibility criteria due to reduced maximum load voltage (0-250V versus 0-400V required) and DC-only output type, eliminating AC load capability. While current handling is superior at 300mA, the voltage limitation restricts application scope.

Not Recommended: AQV104

The AQV104 specifies DC output only, eliminating AC operation compatibility. This constraint restricts substitution validity for applications requiring dual AC/DC capability.

Frequently Asked Questions (FAQ)

Q: Can I use AQV254 as a direct replacement for PS7141-1A-A?

A: The AQV254 maintains identical load current (150mA) and load voltage (0-400V) specifications. Both support AC and DC outputs in the same 6-DIP package. The AQV254 features lower input voltage (1.14VDC versus 1.2VDC) and improved on-state resistance (16Ω versus 30Ω), providing performance enhancement. Direct substitution is valid for electrical and mechanical compatibility.

Q: Why do some substitute parts show higher input voltage requirements (2.3VDC)?

A: The AQV103 and AQV104 employ different photoMOS technologies requiring higher input trigger voltages. These components remain valid substitutes where the higher input voltage is compatible with your drive circuit design. This parameter does not affect load-side compatibility.

Q: Does a lower on-state resistance rating improve performance?

A: Lower on-state resistance reduces voltage drop and power dissipation across the relay contact. The AQV254 (16Ω) and AQV104 (8Ω) dissipate less heat than the PS7141-1A-A (30Ω) at equivalent load currents, offering improved thermal performance without changing electrical function.

Q: Which substitute handles the highest current load?

A: The AQV103 is rated for 300mA maximum load current. This component exceeds the PS7141-1A-A 150mA rating, providing additional margin for current-heavy applications. However, the AQV103 is limited to 0-250V operation and DC output only.

Q: Are all listed substitutes ROHS3 compliant?

A: Most active substitutes carry ROHS3 or RoHS compliance certification. The AQV234 carries RoHS compliance designation. The CT130 carries ROHS3 certification. All listed components comply with REACH regulations except where explicitly noted as REACH Affected (original PS7141-1A-A only).

Q: What is the performance difference between AQV214 and AQV254?

A: Both components share 0-400V load voltage operation and 1.14VDC input voltage with AC/DC output capability. The AQV254 is rated for 150mA (matching the original part) with 16Ω on-state resistance, while the AQV214 handles 120mA with 50Ω on-state resistance. Selection depends on whether 150mA current capacity is required for your application.

Q: Why are AQV103 and AQV104 listed if they have output type limitations?

A: These components appear in the provided substitute list and maintain 6-DIP package compatibility. AQV104 supports 0-400V operation and 180mA current handling. However, their DC-only output type restricts compatibility to applications not requiring AC switching capability.

Q: Can I use CT130 as an alternative to Panasonic components?

A: The CT130 (Coto Technology COTOMOS™) maintains mechanical package alignment, 0-400V operation, and 30Ω on-state resistance matching the original specification. Input voltage is 1.37VDC with 120mA current handling. This component provides cross-manufacturer substitution with active product status and ROHS3 compliance.

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