PS8602L Optoisolator Equivalent & Substitute Parts

Part Overview

The PS8602L is a single-channel optoisolator with transistor output manufactured by CEL in the NEPOC series. This component provides 5000Vrms isolation voltage and is housed in an 8-SMD Gull Wing package. The PS8602L is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across isolation voltage, output type, channel configuration, and surface mount packaging specifications.

Key Parameters

Parameter	PS8602L Value
Manufacturer	CEL
Category	Optoisolators
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Output Type	Transistor
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)	500ns, 300ns
Operating Temperature	-55°C ~ 100°C
Mounting Type	Surface Mount
Package / Case	8-SMD, Gull Wing
Input Type	DC
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PS8602L are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Single-channel configuration (1 Channel)
Transistor output type
Surface mount 8-SMD Gull Wing package
DC input type
Operating temperature range -55°C to 100°C
Current output per channel of 8mA
Maximum DC forward current of 25mA

Isolation Voltage Consideration: The PS8602L specifies 5000Vrms isolation. Substitute parts with equal or higher isolation voltage (5000Vrms or greater) are functionally compatible. Parts with lower isolation voltage (3750Vrms) represent reduced isolation capability and are listed for reference but require design review.

Current Transfer Ratio: The PS8602L minimum CTR is 15% @ 16mA. Substitute parts with equal or higher minimum CTR values maintain or improve circuit performance.

Switching Speed: The PS8602L specifies 500ns turn-on and 300ns turn-off times. Substitute parts with equal or faster switching characteristics are compatible.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 16mA	Output Type	Voltage Output (Max)	Turn On / Turn Off (ns)	Product Status	RoHS Status
PS8602L	CEL	5000Vrms	15%	Transistor	35V	500, 300	Obsolete	Non-compliant
6N136-X017T	Vishay Semiconductor Opto Division	5300Vrms	19%	Transistor with Base	15V	200, 200	Active	ROHS3 Compliant
HCPL-4503#520	Broadcom Limited	5000Vrms	19%	Transistor	20V	200, 600	Active	Non-compliant
HCPL-4503-320E	Broadcom Limited	5000Vrms	19%	Transistor	20V	200, 600	Active	ROHS3 Compliant
HCPL-4503#300	Broadcom Limited	3750Vrms	19%	Transistor	20V	200, 600	Active	Non-compliant
HCPL-4503#360	Broadcom Limited	3750Vrms	19%	Transistor	20V	200, 600	Active	Non-compliant
HCPL-4503#500	Broadcom Limited	3750Vrms	19%	Transistor	20V	200, 600	Active	Non-compliant
HCPL-4503-360E	Broadcom Limited	3750Vrms	19%	Transistor	20V	200, 600	Active	ROHS3 Compliant
HCPL-4504#300	Broadcom Limited	3750Vrms	25%	Transistor	20V	200, 300	Active	Non-compliant
HCPL-J454-400E	Broadcom Limited	3750Vrms	19%	Transistor	20V	500, 800	Active	ROHS3 Compliant
HCPL-J454-600E	Broadcom Limited	3750Vrms	19%	Transistor	20V	500, 800	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Equivalent Isolation Voltage):

The HCPL-4503#520 and HCPL-4503-320E are direct functional equivalents to the PS8602L. Both maintain the 5000Vrms isolation voltage specification and transistor output configuration. The HCPL-4503-320E offers ROHS3 compliance, making it suitable for applications with environmental or regulatory requirements. Both parts are in active production status, ensuring long-term availability.

Secondary Substitutes (Higher Isolation Voltage):

The 6N136-X017T from Vishay provides 5300Vrms isolation, exceeding the PS8602L specification. This part features a transistor with base output configuration and faster switching times (200ns turn-on and turn-off). The 6N136-X017T is ROHS3 compliant and actively produced. The base output configuration provides additional circuit design flexibility compared to standard transistor output.

Alternative Substitutes (Reduced Isolation Voltage):

Parts with 3750Vrms isolation (HCPL-4503#300, HCPL-4503#360, HCPL-4503#500, HCPL-4503-360E, HCPL-4504#300, HCPL-J454-400E, HCPL-J454-600E) are functionally compatible for applications where 3750Vrms isolation meets system requirements. The HCPL-4504#300 offers higher current transfer ratio (25% minimum) compared to the PS8602L (15% minimum), improving circuit margin. ROHS3-compliant variants (-360E, -400E, -600E) are available for regulatory compliance.

Compliance Considerations:

For new designs or applications requiring environmental compliance, ROHS3-compliant variants (HCPL-4503-320E, HCPL-4503-360E, HCPL-J454-400E, HCPL-J454-600E, 6N136-X017T) are recommended. Non-compliant variants remain available for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-4503#520 directly replace the PS8602L?

A: Yes. The HCPL-4503#520 maintains identical 5000Vrms isolation voltage, single-channel transistor output, 8-SMD Gull Wing package, and 8mA output current specifications. Both parts operate across -55°C to 100°C. The HCPL-4503#520 features higher minimum current transfer ratio (19% vs. 15%), improving circuit performance.

Q: What is the difference between HCPL-4503#520 and HCPL-4503-320E?

A: Both parts are electrically identical with 5000Vrms isolation and transistor output. The primary difference is RoHS compliance status: HCPL-4503-320E is ROHS3 compliant, while HCPL-4503#520 is non-compliant. Packaging differs (Tape & Reel vs. Tube), affecting procurement and handling. Select based on compliance requirements and packaging needs.

Q: Can I use a 3750Vrms part (HCPL-4503#300) instead of the 5000Vrms PS8602L?

A: Substitution depends on system isolation requirements. If the application design specifies 5000Vrms isolation as a minimum, a 3750Vrms part does not meet the specification. If the actual isolation requirement is lower, 3750Vrms parts are functionally compatible. Verify isolation voltage requirements in system documentation before substitution.

Q: What is the advantage of the 6N136-X017T over other substitutes?

A: The 6N136-X017T provides 5300Vrms isolation, exceeding the PS8602L specification by 300Vrms. It features faster switching times (200ns turn-on and turn-off vs. 500ns and 300ns), enabling higher-speed applications. The transistor with base output configuration provides additional design flexibility. ROHS3 compliance supports environmental requirements.

Q: Are all substitute parts available in the same package?

A: All listed substitutes use 8-SMD Gull Wing surface mount packages, maintaining PCB layout compatibility with the PS8602L. Packaging format (Tube, Tape & Reel) differs by part number variant but does not affect electrical performance or board-level compatibility.

Q: Which substitute offers the best current transfer ratio performance?

A: The HCPL-4504#300 provides the highest minimum current transfer ratio at 25% @ 16mA, compared to the PS8602L at 15%. Higher CTR improves circuit efficiency and reduces input current requirements. This part operates at 3750Vrms isolation, requiring verification against system isolation specifications.

Q: Is the PS8602L still available for purchase?

A: The PS8602L is classified as obsolete. Inventory availability is limited to existing stock (6408 pieces reported). For new designs or long-term production, selection of an active-status substitute part (HCPL-4503#520, HCPL-4503-320E, or 6N136-X017T) ensures supply chain continuity and manufacturing support.

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