PS2581L1-H-A Equivalent & Substitute Parts

Part Overview

The PS2581L1-H-A is a 5000Vrms optoisolator with transistor output, single channel configuration in 4-DIP package. This component provides galvanic isolation for DC input signals with transistor-based output switching capability. The original manufacturer part (CEL) is discontinued at DiGi Electronics, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA
Maximum Output Voltage	80V
Maximum Output Current	50mA
Vce Saturation (Max)	300mV
Rise / Fall Time	3µs, 5µs
Operating Temperature Range	-55°C ~ 100°C
Package Type	4-DIP (0.400", 10.16mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the PS2581L1-H-A is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Isolation voltage rating: 5000Vrms
Channel configuration: Single channel
Output topology: Transistor output
Current transfer ratio range: 80% to 160% @ 5mA
Maximum output voltage: 80V
Maximum output current per channel: 50mA
Vce saturation maximum: 300mV
Rise and fall time specifications: 3µs and 5µs

Mechanical Equivalence Criteria:

Package type: 4-DIP
Package dimensions: 0.400" (10.16mm)
Mounting method: Through Hole

Compliance Equivalence Criteria:

RoHS3 compliance
REACH compliance status
Moisture sensitivity level: 1 (Unlimited)

Parts meeting all electrical, mechanical, and compliance parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	PS2581L1-H-A (CEL)	PS2581L1-H-A (Renesas Electronics)
Manufacturer	CEL	Renesas Electronics Corporation
Product Status	Discontinued at DiGi Electronics	Active
Series	NEPOC	NEPOC
Number of Channels	1	1
Voltage - Isolation	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	80% @ 5mA	80% @ 5mA
Current Transfer Ratio (Max)	160% @ 5mA	160% @ 5mA
Rise / Fall Time (Typ)	3µs, 5µs	3µs, 5µs
Input Type	DC	DC
Output Type	Transistor	Transistor
Voltage - Output (Max)	80V	80V
Current - Output / Channel	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.17V	1.17V
Current - DC Forward (If) (Max)	80 mA	80 mA
Vce Saturation (Max)	300mV	300mV
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Through Hole	Through Hole
Package / Case	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Affected	REACH Affected

Engineering Selection Recommendations

The PS2581L1-H-A manufactured by Renesas Electronics Corporation is a direct parametric equivalent to the discontinued CEL PS2581L1-H-A. Both parts share identical electrical specifications, mechanical packaging, and compliance certifications.

Selection Basis:

The Renesas Electronics PS2581L1-H-A is the appropriate substitute due to:

Product Status: The Renesas variant maintains active production status, ensuring ongoing availability and supply chain reliability.
Electrical Equivalence: All electrical parameters match exactly, including isolation voltage (5000Vrms), current transfer ratio (80-160% @ 5mA), output voltage and current ratings, and switching characteristics.
Mechanical Compatibility: Identical 4-DIP through-hole package dimensions (0.400", 10.16mm) enable direct board-level substitution without layout modifications.
Compliance Alignment: Both variants maintain ROHS3 compliance, REACH compliance status, and MSL 1 rating, satisfying regulatory and environmental requirements.
Series Continuity: Both parts belong to the NEPOC series, confirming design family consistency.

Frequently Asked Questions (FAQ)

Q: Can the Renesas PS2581L1-H-A be used as a direct replacement for the discontinued CEL PS2581L1-H-A?

A: Yes. The Renesas variant is a parametric equivalent with identical electrical specifications, package type, and compliance certifications. Direct substitution is supported without circuit modifications.

Q: Are there any differences in isolation voltage rating between the two manufacturers?

A: No. Both the CEL and Renesas versions provide 5000Vrms isolation voltage with identical current transfer ratio specifications (80-160% @ 5mA).

Q: Will the Renesas part fit the existing PCB layout designed for the CEL part?

A: Yes. Both parts use the same 4-DIP package with 0.400" (10.16mm) dimensions and through-hole mounting configuration. No PCB redesign is required.

Q: What is the difference in packaging between the two suppliers?

A: The CEL version does not specify packaging format in the available data. The Renesas version is supplied in Tube packaging. Both parts use identical 4-DIP component packaging.

Q: Are the switching characteristics identical between the two parts?

A: Yes. Both parts specify identical rise and fall times of 3µs and 5µs, respectively, and identical Vce saturation maximum of 300mV.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both variants are ROHS3 compliant, REACH affected, and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the inventory status of the substitute part?

A: The Renesas PS2581L1-H-A has 8404 pieces in new original stock, providing adequate supply availability compared to the discontinued CEL variant.

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