PS7241-1B-A Solid State Relay SPST-NC Equivalent & Substitute Parts

Part Overview

The PS7241-1B-A is a Solid State Relay (SSR) manufactured by CEL, configured as a SPST-NC (1 Form B) device in a 4-SOP surface mount package. This component operates with a 1.2VDC input signal and controls AC/DC loads up to 400V at 120mA maximum current. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

PS7241-1B-A

CELIn Stock: 816PS7241-1B-A Datasheet

Current PartRFQ

AQV414S

Panasonic Electric WorksIn Stock: 1564AQV414S Datasheet

SimilarRFQ

AQY414S

Panasonic Electric WorksIn Stock: 5974AQY414S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS7241-1B-A is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Circuit configuration must be SPST-NC (1 Form B)
• Output type must support AC and DC loads
• Load voltage range must encompass 0V ~ 400V
• Input voltage must be compatible with 1.2VDC control signal
• Load current rating must meet or exceed 120mA requirement
• Mounting type must be Surface Mount with Gull Wing termination
• Package footprint must be compatible with 4-SOP or equivalent

Substitute Parts Identified:

1. AQY414S (Panasonic Electric Works) - Primary substitute with identical 4-SOP package
2. AQV414S (Panasonic Electric Works) - Secondary substitute with 6-SOP package variant

Both substitute parts meet the mandatory electrical and mechanical compatibility criteria for the PS7241-1B-A application.

Parameter Comparison

Engineering Selection Recommendations

AQY414S - Recommended Primary Substitute

The AQY414S is the optimal substitute for PS7241-1B-A applications. This part maintains identical 4-SOP package geometry, ensuring direct PCB footprint compatibility without layout modifications. The AQY414S operates with a slightly lower input voltage (1.14VDC versus 1.2VDC), which is within acceptable control signal tolerance. Load current rating of 100mA is lower than the original 120mA specification; applications requiring the full 120mA capacity must be evaluated for current margin. On-state resistance of 35 Ohms is marginally higher than the original 30 Ohms, resulting in minimal additional power dissipation. The AQY414S carries active product status with ROHS3 compliance and REACH unaffected designation, supporting long-term supply chain continuity.

AQV414S - Secondary Substitute for Package-Flexible Designs

The AQV414S provides an alternative when PCB layout modifications are acceptable. This part uses a 6-SOP package instead of 4-SOP, requiring footprint redesign. The AQV414S shares identical electrical specifications with AQY414S (1.14VDC input, 100mA load current, 0V~400V load voltage range). On-state resistance of 50 Ohms is higher than both the original part and AQY414S, increasing power dissipation in the switching element. The 6-SOP package may offer improved thermal characteristics in certain applications. AQV414S is active product with ROHS3 compliance and REACH unaffected status.

Compliance and Supply Considerations

Both substitute parts are manufactured by Panasonic Electric Works under the PhotoMOS™ series, ensuring established quality and reliability standards. Both parts carry ROHS3 compliance and REACH unaffected designation, supporting regulatory requirements in EU and global markets. The original PS7241-1B-A is obsolete; substitution is necessary for new procurements and long-term system support.

Frequently Asked Questions (FAQ)

Q: Can AQY414S directly replace PS7241-1B-A without PCB modifications?

A: Yes. The AQY414S maintains identical 4-SOP (0.173", 4.40mm) package dimensions and gull wing termination style, enabling direct PCB footprint compatibility. No layout changes are required.

Q: What is the impact of the 100mA load current rating on AQY414S compared to the 120mA original specification?

A: The AQY414S load current rating is 100mA, which is 16.7% lower than the PS7241-1B-A specification of 120mA. Applications operating at or near 120mA must be re-evaluated to confirm operation within the 100mA limit. Applications with load currents below 100mA are unaffected.

Q: How does the on-state resistance difference affect circuit performance?

A: PS7241-1B-A specifies 30 Ohms maximum on-state resistance. AQY414S specifies 35 Ohms, and AQV414S specifies 50 Ohms. Higher on-state resistance increases power dissipation during the on-state. For a 100mA load, AQY414S dissipates 0.35W maximum versus 0.30W for the original part, a difference of 0.05W. Thermal design must accommodate this additional dissipation.

Q: Is the 1.14VDC input voltage of substitute parts compatible with 1.2VDC control signals?

A: Yes. The 1.14VDC input specification of both AQY414S and AQV414S is compatible with 1.2VDC control signals. The 0.06VDC difference represents a 5% variation, which is within acceptable control signal tolerance for solid state relay applications.

Q: What is the difference between AQY414S and AQV414S?

A: The primary difference is package configuration. AQY414S uses 4-SOP (0.173", 4.40mm) package, identical to the original PS7241-1B-A. AQV414S uses 6-SOP (0.173", 4.40mm) package, requiring PCB footprint redesign. Electrical specifications are identical (1.14VDC input, 100mA load current, 0V~400V load voltage). AQV414S has higher on-state resistance (50 Ohms versus 35 Ohms for AQY414S).

Q: Are both substitute parts actively manufactured?

A: Yes. Both AQY414S and AQV414S carry active product status from Panasonic Electric Works, ensuring ongoing availability and supply chain support. The original PS7241-1B-A is obsolete and no longer manufactured.

Q: Do the substitute parts meet RoHS and REACH compliance requirements?

A: Yes. Both AQY414S and AQV414S are ROHS3 compliant and REACH unaffected, meeting current EU regulatory requirements for electronic components.