PS2501AL-1-P-A Equivalent & Substitute Parts

Part Overview

The PS2501AL-1-P-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 and consumer electronics.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Maximum Output Voltage	70V
Maximum Output Current	30mA
Vce Saturation (Max)	300mV
Rise / Fall Time	3µs, 5µs
Operating Temperature Range	-55°C ~ 100°C
Mounting Type	Surface Mount
Package Type	4-SMD, Gull Wing
Input Type	DC
Forward Voltage (Typ)	1.2V
Maximum DC Forward Current	30mA

Substitute Part Grouping Explanation

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

Isolation Voltage: 5000Vrms isolation rating is mandatory for functional compatibility.

Channel Configuration: Single-channel architecture must be maintained.

Output Type: Transistor output configuration is required.

Current Transfer Ratio Range: Both minimum (50% @ 5mA) and maximum (400% @ 5mA) specifications must be met.

Electrical Ratings: Maximum output voltage (70V), maximum output current (30mA), and Vce saturation (300mV) define the operational envelope.

Switching Characteristics: Rise and fall times (3µs, 5µs) establish signal integrity requirements.

Package and Mounting: 4-SMD, Gull Wing surface mount package ensures mechanical and electrical compatibility with existing PCB designs.

Operating Temperature: -55°C ~ 100°C range must be supported.

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

Parameter Comparison

Parameter	PS2501AL-1-P-A (CEL)	PS2561AL-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)	50% @ 5mA	50% @ 5mA	Equivalent
Current Transfer Ratio (Max)	400% @ 5mA	400% @ 5mA	Equivalent
Maximum Output Voltage	70V	70V	Equivalent
Maximum Output Current	30mA	30mA	Equivalent
Vce Saturation (Max)	300mV	300mV	Equivalent
Rise / Fall Time	3µs, 5µs	3µs, 5µs	Equivalent
Operating Temperature Range	-55°C ~ 100°C	-55°C ~ 100°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Type	4-SMD, Gull Wing	4-SMD, Gull Wing	Equivalent
Input Type	DC	DC	Equivalent
Forward Voltage (Typ)	1.2V	1.2V	Equivalent
Maximum DC Forward Current	30mA	30mA	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Affected	REACH Affected	Equivalent
ECCN	EAR99	EAR99	Equivalent
HTSUS Code	8541.49.8000	8541.49.8000	Equivalent
Product Status	Discontinued at DiGi Electronics	Not For New Designs	Both Legacy

Engineering Selection Recommendations

The PS2561AL-1-A from Renesas Electronics Corporation is a direct parametric equivalent to the PS2501AL-1-P-A. All electrical, mechanical, and thermal specifications are identical. Both components share ROHS3 compliance, REACH affected status, and identical export classification (EAR99).

Product Status Consideration: The PS2501AL-1-P-A is discontinued at DiGi Electronics, while the PS2561AL-1-A is marked as "Not For New Designs." Both components represent legacy optoisolator technology. For applications currently using the PS2501AL-1-P-A, the PS2561AL-1-A provides functional continuity with 1396 units available in inventory compared to 813 units of the original part.

Compliance and Certification: Both parts maintain identical regulatory compliance profiles, ensuring no additional qualification or documentation requirements for substitution in existing designs.

Packaging: The PS2561AL-1-A is supplied in tube packaging, whereas the PS2501AL-1-P-A packaging specification is not provided. Both use identical 4-SMD, Gull Wing surface mount packages suitable for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can the PS2561AL-1-A be used as a direct replacement for the PS2501AL-1-P-A in existing designs?

A: Yes. All electrical parameters, thermal ratings, isolation voltage, output characteristics, and switching performance are identical. The 4-SMD, Gull Wing package is mechanically compatible with existing PCB layouts.

Q: Are there differences in isolation voltage between these parts?

A: No. Both components provide 5000Vrms isolation voltage, which is the primary specification for optoisolator selection in high-voltage isolation applications.

Q: What is the significance of the different product status designations?

A: The PS2501AL-1-P-A is discontinued at DiGi Electronics, indicating end-of-life status. The PS2561AL-1-A is marked "Not For New Designs," indicating legacy status. For maintenance and repair of existing equipment, the PS2561AL-1-A provides continued availability.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both components are ROHS3 compliant, REACH affected, and classified under ECCN EAR99 with identical HTSUS code 8541.49.8000.

Q: Are the current transfer ratios identical?

A: Yes. Both parts specify 50% minimum and 400% maximum current transfer ratio at 5mA input current, ensuring equivalent signal isolation performance.

Q: What is the maximum output current for both parts?

A: Both the PS2501AL-1-P-A and PS2561AL-1-A support 30mA maximum output current per channel.

Q: Are the switching characteristics the same?

A: Yes. Both components exhibit identical rise time (3µs) and fall time (5µs), maintaining equivalent signal integrity in switching applications.

Q: What is the operating temperature range for both parts?

A: Both components operate across -55°C to 100°C, providing identical thermal performance for industrial and consumer applications.

Q: Is the moisture sensitivity level the same?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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