HCPL-817-50LE Equivalent & Substitute Parts

Part Overview

The HCPL-817-50LE is a 5000Vrms optoisolator with transistor output manufactured by Broadcom Limited. This single-channel device is designed for high-voltage isolation applications requiring DC input and transistor output configuration in a 4-SMD surface mount package. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the original HCPL-817-50LE becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives from qualified manufacturers.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	100% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	70V
Current - Output / Channel	50mA
Rise / Fall Time (Typ)	4µs, 3µs
Vce Saturation (Max)	200mV
Operating Temperature	-30°C ~ 100°C
Package / Case	4-SMD, Gull Wing
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-817-50LE is determined by the following critical parameters:

Voltage - Isolation: 5000Vrms minimum
Number of Channels: 1
Output Type: Transistor
Current - Output / Channel: 50mA
Package / Case: 4-SMD, Gull Wing
Mounting Type: Surface Mount
Input Type: DC
Vce Saturation (Max): 200mV

Substitute parts must maintain these electrical and mechanical specifications. Variations in Current Transfer Ratio (Max), Voltage - Output (Max), and Operating Temperature range are permitted when the minimum requirements are met. Packaging format (Tube, Tape & Reel, Cut Tape) does not affect electrical compatibility but may impact procurement and assembly processes.

Parameter Comparison

Parameter	HCPL-817-50LE (Broadcom)	LTV-817S (Lite-On)	LTV-817S-TA (Lite-On)	LTV-817S-TA1 (Lite-On)	ISP817XSM (Isocom)	LTV-816S (Lite-On)	LTV-816S-TA1 (Lite-On)
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5300Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	100% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	70V	35V	35V	35V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Vce Saturation (Max)	200mV	200mV	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-30°C ~ 100°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-30°C ~ 100°C	-50°C ~ 110°C	-50°C ~ 110°C
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the HCPL-817-50LE.

The LTV-817S series (LTV-817S, LTV-817S-TA, LTV-817S-TA1) from Lite-On Inc. provides direct electrical substitution with identical isolation voltage and output specifications. These parts are available in multiple packaging formats to accommodate different procurement and assembly requirements. The extended operating temperature range (-55°C ~ 110°C) provides broader environmental coverage compared to the original part.

The ISP817XSM from Isocom Components offers increased isolation voltage (5300Vrms) and higher maximum output voltage (80V), making it suitable for applications requiring enhanced isolation margins. Operating temperature range matches the original specification.

The LTV-816S series (LTV-816S, LTV-816S-TA1) from Lite-On Inc. provides equivalent isolation voltage with higher maximum output voltage (80V) and extended operating temperature range (-50°C ~ 110°C). These parts are suitable for designs requiring higher output voltage capability.

Frequently Asked Questions (FAQ)

Q: Can LTV-817S series parts replace HCPL-817-50LE in existing designs?

A: Yes. The LTV-817S, LTV-817S-TA, and LTV-817S-TA1 maintain identical isolation voltage (5000Vrms), output current (50mA), and switching characteristics (4µs rise, 3µs fall time). The primary difference is maximum output voltage (35V versus 70V). Substitution is valid for applications where output voltage does not exceed 35V.

Q: What is the difference between LTV-817S and LTV-817S-TA packaging?

A: LTV-817S is supplied in Tube packaging, while LTV-817S-TA is supplied in Tape & Reel (TR) format. Both contain identical electrical components. Packaging selection depends on assembly process requirements and procurement volume.

Q: Why does ISP817XSM have higher isolation voltage than the original part?

A: ISP817XSM is rated for 5300Vrms isolation, exceeding the 5000Vrms specification of HCPL-817-50LE. This higher rating provides additional isolation margin and does not affect compatibility in applications designed for 5000Vrms isolation.

Q: Are LTV-816S parts compatible with HCPL-817-50LE?

A: LTV-816S and LTV-816S-TA1 maintain 5000Vrms isolation voltage and 50mA output current. Maximum output voltage is 80V, exceeding the original 70V specification. These parts are compatible for applications within the original voltage and current specifications.

Q: What is the impact of different operating temperature ranges?

A: The original HCPL-817-50LE operates from -30°C to 100°C. Substitute parts offer extended ranges: LTV-817S series (-55°C ~ 110°C), LTV-816S series (-50°C ~ 110°C), and ISP817XSM (-30°C ~ 100°C). Extended ranges provide flexibility for applications with broader environmental requirements but do not affect compatibility in the original temperature range.

Q: Can substitute parts be mixed in the same production batch?

A: All listed substitute parts maintain identical electrical specifications for isolation voltage, output current, and switching characteristics. However, manufacturing and procurement practices should maintain consistency within a single production batch to ensure traceability and quality control.

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