PS8602 Equivalent & Substitute Parts

Part Overview

The PS8602 is an obsolete optoisolator transistor output device manufactured by CEL, rated for 5000Vrms isolation voltage in an 8-DIP package. The component features single-channel isolation suitable for DC input applications with 8mA output current capacity. Due to its obsolete product status, identifying equivalent and substitute components is essential for design continuity and ongoing system maintenance.

Key Parameters

Parameter	PS8602 Specification
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Turn On / Turn Off Time	500ns, 300ns
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.7V
Current - DC Forward (If) (Max)	25mA
Operating Temperature Range	-55°C ~ 100°C
Package / Case	8-DIP (0.300", 7.62mm)
Number of Channels	1
Input Type	DC
Mounting Type	Through Hole
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Affected

Substitute Part Grouping Explanation

Substitution validity for optoisolators is determined by electrical compatibility within defined parameter ranges. The PS8602 can be replaced by components meeting the following criteria:

Critical Parameters for Substitution:

Isolation voltage rating equal to or greater than 5000Vrms
Output type: Transistor (standard transistor or transistor with base output acceptable)
Package: 8-DIP (0.300", 7.62mm) through-hole configuration
Current transfer ratio minimum acceptable at 16mA input
Single-channel configuration
Operating temperature range supporting -55°C ~ 100°C
Input type: DC

Parameter Allowances:

Output voltage maximum can be lower than the PS8602 (35V max) if circuit design accommodates
Current-output specifications of 8mA per channel are baseline; higher ratings are compatible
Turn-on/turn-off times may vary within practical circuit application limits
Forward voltage (Vf) variations within specified ranges maintain LED input compatibility

Substitutes are grouped into two categories: Parametric Equivalents (matching all key electrical specifications) and Functional Substitutes (meeting minimum substitution criteria with parameter variations).

Parameter Comparison

Parameter	PS8602 (Main)	PS8502-AX (Parametric Equivalent)	HCPL-4504#020 (Substitute)	HCPL-4504-020E (Substitute)	HCPL-4503 (Substitute)	6N136 (Substitute)
Manufacturer	CEL	Renesas Electronics	Broadcom Limited	Broadcom Limited	Broadcom Limited	onsemi
Product Status	Obsolete	Active	Active	Active	Active	Obsolete
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	3750Vrms	2500Vrms
Current Transfer Ratio (Min)	15% @ 16mA	15% @ 16mA	25% @ 16mA	25% @ 16mA	19% @ 16mA	19% @ 16mA
Turn On / Turn Off Time	500ns, 300ns	220ns, 350ns	200ns, 300ns	200ns, 300ns	200ns, 600ns	450ns, 500ns
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor with Base
Voltage - Output (Max)	35V	35V	20V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.7V	1.7V	1.5V	1.5V	1.5V	1.45V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA	25mA
Operating Temperature Range	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	REACH Unaffected

Engineering Selection Recommendations

PS8502-AX (Parametric Equivalent - Primary Recommendation)

The PS8502-AX from Renesas Electronics Corporation represents the closest parametric equivalent to the PS8602. Both components share identical isolation voltage (5000Vrms), output voltage maximum (35V), current transfer ratio specifications, and operating temperature range. The PS8502-AX is actively produced with ROHS3 compliance, providing supply continuity and regulatory alignment for new designs. Turn-on/turn-off timing differences (220ns/350ns vs. 500ns/300ns) fall within acceptable operational variance for most DC isolation applications.

HCPL-4504#020 and HCPL-4504-020E (Primary Active Substitutes)

Both HCPL-4504 variants from Broadcom Limited maintain full 5000Vrms isolation equivalence to the PS8602. These components feature improved current transfer ratio specifications (25%-60% @ 16mA) and faster switching response (200ns/300ns). The HCPL-4504-020E variant carries ROHS3 compliance, while the HCPL-4504#020 maintains RoHS non-compliant status. Output voltage rating reduces to 20V maximum; circuit designs operating below 20V output are directly interchangeable.

HCPL-4503 (Active Substitute - Reduced Isolation Rating)

The HCPL-4503 from Broadcom Limited reduces isolation voltage to 3750Vrms, representing a suitable substitute only for applications with isolation requirements below 5000Vrms. This component maintains output voltage, current, and thermal specifications compatible with PS8602 designs. Active product status and REACH unaffected classification support long-term availability. RoHS non-compliance status matches the PS8602.

6N136 (Functional Substitute - Reduced Isolation Rating)

The onsemi 6N136 provides isolation at 2500Vrms, suitable for low-voltage isolation circuits only. Output voltage maximum of 20V and transistor-with-base configuration differ from the PS8602 transistor output. Obsolete product status limits long-term supply assurance. Use this component in legacy design replacements where 2500Vrms isolation meets circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-4504 variants replace the PS8602 directly?

A: HCPL-4504#020 and HCPL-4504-020E provide direct pin-compatible replacement in 8-DIP through-hole configurations with equivalent 5000Vrms isolation voltage. Design circuits operating at output voltages of 20V or less encounter no compatibility issues. Circuits requiring output operation above 20V require evaluation of alternative recommendations.

Q: What is the difference between PS8502-AX and HCPL-4504 for new designs?

A: PS8502-AX maintains identical output voltage maximum (35V) and matching current transfer ratio specifications to the PS8602, providing closest parametric continuity. HCPL-4504 variants feature improved current transfer ratio (25%-60%) and faster switching performance, with reduced output voltage rating (20V). Select PS8502-AX for designs requiring 35V output capability; select HCPL-4504 for designs benefiting from enhanced switching characteristics within 20V output constraints.

Q: Is the 6N136 recommended as a substitute?

A: The 6N136 meets minimum package and mechanical compatibility requirements but operates at 2500Vrms isolation voltage. Use this component only when design requirements specify isolation voltage of 2500Vrms or lower. Obsolete product status indicates limited future availability.

Q: What compliance requirements differ between substitute options?

A: HCPL-4504-020E and PS8502-AX carry ROHS3 compliance status, suitable for regulatory environments requiring RoHS3 alignment. HCPL-4504#020, HCPL-4503, and 6N136 maintain RoHS non-compliant status matching the original PS8602. HCPL-4504-020E and PS8502-AX provide REACH unaffected classification, while the PS8602 and 6N136 carry REACH affected status.

Q: Are all substitutes available in tube packaging?

A: PS8502-AX, HCPL-4504#020, and HCPL-4504-020E are supplied in tube packaging. The 6N136 and HCPL-4503 are provided in tube packaging, matching common distribution formats for through-hole optoisolator components.

Q: Do switching time differences affect circuit operation?

A: All substitute components operate within -55°C to 100°C temperature range with DC input compatibility. Turn-on and turn-off timing variations across the substitute family (200ns to 500ns ranges) remain within standard operational margins for DC isolation applications. Circuit designs dependent on specific timing thresholds require detailed datasheet evaluation against application switching frequency requirements.

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