PS8501L1-AX Optoisolator Equivalent & Substitute Parts

Part Overview

The PS8501L1-AX is a 5000Vrms optoisolator transistor with base output in an 8-DIP package configuration. This component provides electrical isolation between input and output circuits using a light-coupled semiconductor mechanism. The main part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for continued system design and procurement. The product maintains RoHS3 compliance and REACH unaffected status, suitable for industrial isolation applications.

Key Parameters

Parameter	Value
Part Number	PS8501L1-AX
Manufacturer	CEL / Renesas Electronics Corporation
Category	Optoisolators
Package Type	8-DIP (0.400", 10.16mm)
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Output Type	Transistor with Base
Voltage - Output (Max)	35V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.7V
Current - DC Forward (If) (Max)	25mA
Turn On / Turn Off Time (Typ)	220ns, 350ns
Operating Temperature Range	-55°C ~ 100°C
Mounting Type	Through Hole
Input Type	DC
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PS8501L1-AX is determined by strict alignment with core electrical isolation parameters. The primary criteria for substitution include: isolation voltage rating (5000Vrms), number of channels (1), output type (transistor with base), input type (DC), and physical package (8-DIP through-hole configuration).

Substitute parts have been categorized into two groups:

Direct Electrical Equivalents (5000Vrms Isolation): HCNW136-000E and HCNW4562-000E maintain the 5000Vrms isolation rating required for applications requiring maximum breakdown protection. These parts preserve the core functional specifications of the main part.

Lower Isolation Equivalent: HCPL-4562-000E operates at 3750Vrms isolation, representing a lower rating that may be suitable only for applications with reduced isolation requirements.

Parametric Reference: PS8501L1-AX (Renesas Electronics Corporation variant) is listed as a parametric equivalent, maintaining identical electrical specifications to the original CEL part.

Parameter Comparison

Parameter	PS8501L1-AX (Original)	HCNW136-000E	HCNW4562-000E	HCPL-4562-000E
Manufacturer	CEL	Broadcom Limited	Broadcom Limited	Broadcom Limited
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	3750Vrms
Current Transfer Ratio (Min)	15% @ 16mA	15% @ 16mA	-	-
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	35V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.7V	1.68V	1.6V	1.3V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	12mA
Turn On / Turn Off Time (Typ)	220ns, 350ns	1µs, 1µs (Max)	-	-
Operating Temperature Range	-55°C ~ 100°C	-55°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.300", 7.62mm)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

HCNW136-000E (Broadcom Limited): This part maintains 5000Vrms isolation and 15% minimum current transfer ratio, matching the original PS8501L1-AX specifications. Product status is active with confirmed availability. RoHS3 compliance and REACH unaffected status align with compliance requirements. Operating temperature range of -55°C to 85°C provides coverage for most industrial applications, though the original part extends to 100°C. Maximum output voltage is 20V compared to the original 35V.

HCNW4562-000E (Broadcom Limited): This substitute maintains 5000Vrms isolation voltage and compatible package dimensions (0.400", 10.16mm). Maximum output voltage is 20V. Product status is active. RoHS3 and REACH compliance are confirmed. Current transfer ratio specifications are not provided for this variant.

HCPL-4562-000E (Broadcom Limited): This option operates at 3750Vrms isolation voltage, 1250Vrms lower than the original specification. Package dimensions differ at 0.300" (7.62mm) versus 0.400" (10.16mm), requiring PCB layout verification. Maximum forward current is limited to 12mA compared to 25mA in the original part. Use this variant only where reduced isolation voltage is acceptable for system requirements.

Frequently Asked Questions (FAQ)

Q: Can HCNW136-000E directly replace PS8501L1-AX in all applications?

A: HCNW136-000E is electrically compatible for isolation voltage and current transfer ratio. However, maximum output voltage is 20V versus 35V in the original. Verify that your circuit operates within the 20V limit. Operating temperature maximum of 85°C is lower than the original 100°C.

Q: What is the key difference between HCNW4562-000E and HCPL-4562-000E?

A: HCNW4562-000E maintains 5000Vrms isolation matching the original part. HCPL-4562-000E operates at 3750Vrms, providing lower isolation protection. Package dimensions also differ: HCNW4562-000E uses 0.400" (10.16mm) spacing, while HCPL-4562-000E uses 0.300" (7.62mm), making them physically incompatible without board redesign.

Q: Why does HCPL-4562-000E have a different package size?

A: HCPL-4562-000E features a 0.300" (7.62mm) DIP pitch instead of 0.400" (10.16mm). This is a different physical form factor and requires PCB layout modification. Maximum forward current is also reduced to 12mA.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts maintain RoHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original PS8501L1-AX.

Q: What is the difference in switching speed between parts?

A: PS8501L1-AX provides turn on/turn off times of 220ns and 350ns respectively. HCNW136-000E specifies maximum switching time of 1µs (1000ns), representing slower response. HCNW4562-000E and HCPL-4562-000E do not provide switching time specifications in available datasheets.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message