PS7241-1A-F3-A

Part Overview

The PS7241-1A-F3-A is a solid state relay (SSR) manufactured by CEL, configured as a SPST-NO (1 Form A) device rated for 120 mA load current across 0-400V AC/DC applications. The product status is obsolete, necessitating identification of functionally equivalent active alternatives for continued component sourcing and design implementation.

Substiute Parts

PS7241-1A-F3-A

CELIn Stock: 18777PS7241-1A-F3-A Datasheet

Current PartRFQ

TLP176GA(F)

Toshiba Semiconductor and StorageIn Stock: 960TLP176GA(F) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TLP176GA(F) from Toshiba Semiconductor and Storage qualifies as a direct substitute based on the following critical parameters:

• Circuit Configuration: Both devices implement SPST-NO (1 Form A) switching with identical functional behavior
• Load Voltage Range: Both support 0 V ~ 400 V AC/DC operation
• Load Current Rating: Both rated at 120 mA maximum
• Package Compatibility: Both use 4-pin surface mount packages with gull wing termination, enabling direct PCB footprint compatibility
• Input Control Voltage: Both operate at low DC control voltages (1.2 VDC primary vs. 1.15 VDC substitute), maintaining functional interchangeability
• Moisture Sensitivity: Both classified as MSL 1 (Unlimited)

The TLP176GA(F) remains in active production status, resolving the obsolescence issue of the PS7241-1A-F3-A while maintaining electrical and mechanical compatibility for circuit-level replacement.

Parameter Comparison

Engineering Selection Recommendations

The TLP176GA(F) is the recommended substitute for PS7241-1A-F3-A designs. The primary advantage is active production status, ensuring long-term component availability and supply chain stability. Both devices meet identical electrical requirements for SPST-NO solid state relay applications at 120 mA, 0-400V.

The TLP176GA(F) exhibits a 5 Ω increase in maximum on-state resistance (35 Ω vs. 30 Ω), which remains acceptable for most circuit applications given the 120 mA load current specification. Input control voltage differential (1.15 VDC vs. 1.2 VDC) is negligible for practical logic-level driving circuits.

RoHS compliance certification of the TLP176GA(F) provides additional environmental and regulatory advantages over the obsolete PS7241-1A-F3-A. Both devices maintain unlimited moisture sensitivity rating, eliminating special storage or handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the TLP176GA(F) directly replace the PS7241-1A-F3-A in existing designs?

A: Yes. Both devices implement identical SPST-NO circuit configuration, support 0-400V load voltage, and handle 120 mA load current. Surface mount package compatibility (gull wing termination) enables direct PCB substitution without layout modification.

Q: What is the impact of the 5 Ω on-state resistance difference?

A: At 120 mA load current, the PS7241-1A-F3-A produces maximum 3.6 W power dissipation (120 mA × 30 Ω), while the TLP176GA(F) produces 5.04 W (120 mA × 35 Ω). This 1.4 W difference remains within acceptable thermal management for typical SSR applications. Circuit design validation is required if thermal margins are critical.

Q: Are there package footprint differences between these devices?

A: Both devices use 4-pin surface mount packages with gull wing termination. Physical dimensions are compatible for direct PCB placement, enabling straightforward component substitution.

Q: What compliance advantages does the TLP176GA(F) provide?

A: The TLP176GA(F) carries RoHS compliance certification, whereas the PS7241-1A-F3-A is obsolete with no active compliance status. For designs subject to RoHS requirements, the TLP176GA(F) satisfies regulatory constraints.

Q: Is control voltage compatibility assured?

A: Input voltage specifications differ slightly (1.15 VDC vs. 1.2 VDC), but both operate within standard logic-level signal ranges. Existing driver circuits will function with both devices without modification.