PS2561-1-V Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2561-1-V is a 5000Vrms isolation optoisolator with transistor output manufactured by CEL in a 4-DIP through-hole package. This component provides galvanic isolation for single-channel DC input applications with a maximum output current of 50mA per channel. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing system support and new procurement requirements.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	80% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Maximum Output Voltage	80V
Maximum Output Current	50mA
Rise / Fall Time	3µs, 5µs
Operating Temperature Range	-55°C to 100°C
Package Type	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the PS2561-1-V is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Isolation voltage rating of 5000Vrms
Single-channel configuration
Transistor output topology
Current transfer ratio range: 80% to 400% @ 5mA
Maximum output voltage of 80V
Maximum output current of 50mA per channel
Rise and fall time specifications of 3µs and 5µs
DC input type
Operating temperature range of -55°C to 100°C

Mechanical Equivalence Criteria:

4-DIP package format with 0.300" (7.62mm) pitch
Through-hole mounting configuration

The PS2561-1-A manufactured by Renesas Electronics Corporation meets all electrical and mechanical equivalence criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Parameter	PS2561-1-V (CEL)	PS2561-1-A (Renesas)	Match Status
Isolation Voltage	5000Vrms	5000Vrms	Equivalent
Number of Channels	1	1	Equivalent
Output Type	Transistor	Transistor	Equivalent
Current Transfer Ratio (Min)	80% @ 5mA	80% @ 5mA	Equivalent
Current Transfer Ratio (Max)	400% @ 5mA	400% @ 5mA	Equivalent
Maximum Output Voltage	80V	80V	Equivalent
Maximum Output Current	50mA	50mA	Equivalent
Voltage - Forward (Vf) (Typ)	1.17V	1.17V	Equivalent
Current - DC Forward (If) (Max)	80mA	80mA	Equivalent
Vce Saturation (Max)	300mV	300mV	Equivalent
Rise / Fall Time	3µs, 5µs	3µs, 5µs	Equivalent
Operating Temperature Range	-55°C to 100°C	-55°C to 100°C	Equivalent
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Product Status	Obsolete	Not For New Designs	Both discontinued
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Difference noted

Engineering Selection Recommendations

PS2561-1-A (Renesas Electronics Corporation) is the direct parametric equivalent for PS2561-1-V applications. All electrical specifications, output characteristics, and mechanical dimensions are identical. The substitute part maintains full functional compatibility for existing circuit designs.

Compliance Consideration: The PS2561-1-A carries ROHS3 compliance status, whereas the original PS2561-1-V is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the PS2561-1-A provides compliance advantage. Both parts are REACH-affected and classified under ECCN EAR99.

Product Status: Both the original part and substitute are classified as discontinued (Obsolete and Not For New Designs respectively). Selection should prioritize available inventory and long-term supply chain viability. The PS2561-1-A currently maintains higher inventory availability (26,300 pieces) compared to the original part (2,513 pieces).

Packaging: The PS2561-1-A is supplied in tube packaging, whereas original packaging specification for PS2561-1-V is not detailed. Verify packaging requirements for automated assembly processes if applicable.

Frequently Asked Questions (FAQ)

Q: Can PS2561-1-A directly replace PS2561-1-V in existing designs?

A: Yes. The PS2561-1-A is a parametric equivalent with identical electrical specifications, output characteristics, and 4-DIP package dimensions. Direct substitution is supported without circuit modification.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: isolation voltage (5000Vrms), channel count (1), output type (transistor), current transfer ratio range (80-400% @ 5mA), maximum output voltage (80V), maximum output current (50mA), rise/fall time (3µs, 5µs), and package format (4-DIP through-hole). All parameters must match exactly.

Q: Are there differences in RoHS compliance between these parts?

A: Yes. The PS2561-1-A is ROHS3 compliant, while the PS2561-1-V is RoHS non-compliant. For applications requiring RoHS compliance, the PS2561-1-A satisfies regulatory requirements.

Q: What is the difference between "Obsolete" and "Not For New Designs" status?

A: Both statuses indicate discontinued products. "Obsolete" indicates the part is no longer manufactured or supported. "Not For New Designs" indicates the manufacturer has discontinued the product line but may maintain limited support. Both require substitute identification for ongoing applications.

Q: Are the forward voltage and saturation characteristics identical?

A: Yes. Both parts specify Vf (Typ) of 1.17V, maximum DC forward current of 80mA, and maximum Vce saturation of 300mV. These parameters are electrically equivalent.

Q: What packaging format is used for the PS2561-1-A?

A: The PS2561-1-A is supplied in tube packaging. Verify compatibility with your procurement and assembly requirements, as the original PS2561-1-V packaging specification is not provided.

Q: Can these parts be used in new designs?

A: Both parts carry discontinued status and are not recommended for new designs. However, if legacy system support or replacement applications require these specifications, the PS2561-1-A provides the most current equivalent with improved RoHS compliance.

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