PS2501AL-1-A Equivalent & Substitute Parts

Part Overview

The PS2501AL-1-A is a single-channel optoisolator with transistor output manufactured by CEL, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This component is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. The part operates with DC input and provides transistor output suitable for signal isolation in industrial control, power management, and safety-critical circuits.

Substiute Parts

PS2501AL-1-A

CELIn Stock: 824PS2501AL-1-A Datasheet

Current PartRFQ

PS2561AL-1-A

Renesas Electronics CorporationIn Stock: 1413PS2561AL-1-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2501AL-1-A is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms isolation rating is mandatory for circuit protection and safety compliance.

Channel Configuration: Single-channel architecture must be maintained for circuit topology compatibility.

Output Type: Transistor output configuration is required for signal switching and control applications.

Current Transfer Ratio Range: 50% minimum and 400% maximum at 5mA input current establish the gain characteristics necessary for reliable signal transmission.

Output Specifications: Maximum output voltage of 70V and maximum output current of 30mA define the load-driving capability.

Switching Performance: Rise and fall times of 3µs and 5µs respectively establish the frequency response and timing characteristics.

Operating Temperature Range: -55°C to 100°C operating window must be maintained for environmental compatibility.

Mounting and Package: Surface mount 4-SMD Gull Wing package is required for PCB assembly compatibility.

Compliance Standards: ROHS3 compliance and REACH affected status must be preserved for regulatory adherence.

The PS2561AL-1-A manufactured by Renesas Electronics Corporation meets all these criteria and is identified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

PS2561AL-1-A Selection Basis:

The PS2561AL-1-A manufactured by Renesas Electronics Corporation is a direct parametric equivalent to the PS2501AL-1-A. All electrical specifications, mechanical dimensions, and compliance certifications are identical across the comparison matrix.

Product Status Consideration:

Both the original PS2501AL-1-A and the substitute PS2561AL-1-A carry legacy product status. The PS2501AL-1-A is discontinued at DiGi Electronics, while the PS2561AL-1-A is marked as "Not For New Designs." This indicates both components are in end-of-life phases. For new design implementations, consultation with component suppliers regarding long-term availability and alternative modern optoisolator families is advised based on application requirements.

Compliance and Certification:

Both parts maintain ROHS3 compliance and REACH affected status, ensuring regulatory alignment for applications subject to environmental and hazardous substance restrictions. Moisture sensitivity level MSL 1 (Unlimited) indicates no special storage or handling requirements beyond standard component practices.

Inventory and Availability:

Current inventory shows 1396 pieces of PS2561AL-1-A available in new original condition, compared to 732 pieces of PS2501AL-1-A. The PS2561AL-1-A is supplied in tube packaging, while the original part packaging specification is not provided.

Frequently Asked Questions (FAQ)

Q: Can PS2561AL-1-A directly replace PS2501AL-1-A in existing circuit designs?

A: Yes. The PS2561AL-1-A is a parametric equivalent with identical electrical specifications, output characteristics, isolation voltage, current transfer ratio, switching times, and operating temperature range. The 4-SMD Gull Wing package is identical, enabling direct PCB footprint compatibility.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution eligibility is determined by: 5000Vrms isolation voltage, single-channel configuration, transistor output type, 50-400% current transfer ratio at 5mA, 70V maximum output voltage, 30mA maximum output current, 3µs and 5µs rise/fall times, -55°C to 100°C operating range, and 4-SMD Gull Wing surface mount package. Deviation in any of these parameters disqualifies a component as a direct substitute.

Q: Are there packaging differences between PS2501AL-1-A and PS2561AL-1-A?

A: Both components use identical 4-SMD Gull Wing surface mount packages. The PS2561AL-1-A is supplied in tube packaging. The original PS2501AL-1-A packaging format is not specified in available documentation.

Q: What is the significance of the "Not For New Designs" status on PS2561AL-1-A?

A: This designation indicates the component is in end-of-life status and is not recommended for new product development. However, it remains functionally equivalent for replacement and maintenance applications in existing systems. For new designs, alternative modern optoisolator solutions should be evaluated.

Q: Do both parts meet current environmental and regulatory requirements?

A: Yes. Both PS2501AL-1-A and PS2561AL-1-A are ROHS3 compliant and REACH affected, meeting current environmental regulations for hazardous substance restrictions. Moisture sensitivity level MSL 1 indicates unlimited shelf life under standard storage conditions.

Q: What is the difference in current transfer ratio specifications?

A: Both parts specify identical current transfer ratio parameters: minimum 50% at 5mA input current and maximum 400% at 5mA input current. This range defines the optical coupling efficiency and signal gain characteristics.

Q: Are there any thermal or switching performance differences?

A: No. Rise time (3µs) and fall time (5µs) are identical, as are the operating temperature range (-55°C to 100°C), Vce saturation maximum (300mV), and forward voltage (1.2V typical). Thermal and switching performance are equivalent.