PS2501A-1-H-A Optoisolator 5KV Transistor Output - Equivalent & Substitute Parts

Part Overview

The PS2501A-1-H-A is a high-voltage optoisolator with transistor output, rated for 5000Vrms isolation voltage and designed for single-channel signal isolation in industrial and medical applications. This component features a 4-DIP through-hole package with a 1-channel transistor output configuration. The main part is currently discontinued at DiGi Electronics, making knowledge of equivalent and substitute parts essential for ongoing circuit maintenance, production continuity, and design updates.

Substiute Parts

PS2501A-1-H-A

CELIn Stock: 794PS2501A-1-H-A Datasheet

Current PartRFQ

PS2501A-1-Q-A

Renesas Electronics CorporationIn Stock: 1043PS2501A-1-Q-A Datasheet

SimilarRFQ

PS2501A-1-W-A

Renesas Electronics CorporationIn Stock: 860PS2501A-1-W-A Datasheet

SimilarRFQ

PS2561A-1-H-A

Renesas Electronics CorporationIn Stock: 7894PS2561A-1-H-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of optoisolator components is determined by strict alignment of electrical and mechanical parameters. For PS2501A-1-H-A, the critical substitution criteria are:

Primary Substitution Parameters:

• Voltage isolation rating: 5000Vrms minimum
• Number of channels: 1 channel
• Output type: Transistor output
• Package type: 4-DIP (0.300", 7.62mm)
• Mounting: Through hole
• Operating temperature range: -55°C to 100°C minimum

Secondary Alignment Parameters:

• Maximum output voltage: 70V or greater
• Output current per channel: 30mA or greater
• Vce saturation: 300mV or less
• Input type: DC

Variant Criteria (CTR Rating Variations): The PS2501 series includes variants with different Current Transfer Ratio specifications. Parts may differ in minimum and maximum CTR values while maintaining identical isolation voltage, output specifications, and package form factor. These variations represent grade or bin classifications within the same product family.

The three substitute parts listed maintain all primary and secondary parameters, with variations only in Current Transfer Ratio ranges and inventory status.

Parameter Comparison

Engineering Selection Recommendations

PS2501A-1-Q-A (Recommended Primary Substitute) This part maintains identical electrical and mechanical specifications to the main part with a Current Transfer Ratio range of 100%–200% @ 5mA. It is manufactured by Renesas Electronics Corporation with active product status and 1002 units in inventory, providing continuity and long-term availability. Full ROHS3 compliance and REACH compliance align with regulatory requirements.

PS2501A-1-W-A (Secondary Substitute - Higher CTR Grade) This variant offers an elevated Current Transfer Ratio range of 130%–260% @ 5mA while maintaining all other specifications. It is actively manufactured by Renesas Electronics Corporation with 811 units available. This grade is suitable for applications where higher transfer ratio performance is acceptable or beneficial. ROHS3 and REACH compliance are maintained.

PS2561A-1-H-A (Parametric Equivalent - Highest Inventory) This part is a base series variant with the same 80%–160% CTR range as the main part. Manufactured by Renesas Electronics Corporation, it has the highest inventory level at 7881 units, providing the greatest supply security. It is fully active in production with identical compliance certifications. This part is suitable for drop-in replacement where CTR specifications must precisely match the original design.

All three substitute parts share identical isolation voltage, output specifications, package form factor, and thermal operating range with the PS2501A-1-H-A.

Frequently Asked Questions (FAQ)

Q: Why is PS2501A-1-H-A substitution necessary? A: The PS2501A-1-H-A is discontinued at DiGi Electronics. The listed substitutes maintain all functional specifications, including 5000Vrms isolation voltage, single-channel transistor output, and 4-DIP through-hole packaging, enabling direct replacement in existing designs.

Q: Are these parts pin-compatible? A: All substitute parts use the 4-DIP (0.300", 7.62mm) package with through-hole mounting. Pin compatibility is based on identical NEPOC series configuration and package type. Consult device datasheets for exact pinout confirmation.

Q: What is the difference between PS2501A-1-Q-A and PS2501A-1-W-A? A: Both parts are identical in all specifications except Current Transfer Ratio range. PS2501A-1-Q-A has a CTR of 100%–200%, while PS2501A-1-W-A has a CTR of 130%–260%. Select based on whether your circuit design requires the higher CTR performance offered by the -W-A variant.

Q: How does PS2561A-1-H-A differ from the PS2501 variants? A: PS2561A-1-H-A is a base series variant within the NEPOC optoisolator family. It maintains the same CTR range (80%–160%) as the original PS2501A-1-H-A and all electrical specifications. The higher inventory (7881 units) offers superior supply chain security.

Q: Are these parts suitable for medical or industrial isolation applications? A: All listed parts are ROHS3 compliant with 5000Vrms isolation voltage rating, supporting high-voltage isolation requirements in industrial and medical applications. Moisture sensitivity level is MSL 1 (unlimited), indicating no special storage conditions.

Q: Do these substitutes require circuit modifications? A: These parts are direct substitutes maintaining identical electrical and mechanical specifications. No circuit modifications are required for replacement, provided the Current Transfer Ratio range of your selected part is acceptable to your design.