HCPL-4701#500 Equivalent & Substitute Parts

Part Overview

The HCPL-4701#500 is a 3750Vrms optoisolator with Darlington output and base connection, configured as a single-channel 8-DIP Gull Wing surface mount device. This component is discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts that maintain functional compatibility within isolation voltage, output current, and switching characteristics.

Key Parameters

Parameter	Value
Isolation Voltage	3750Vrms
Number of Channels	1
Output Type	Darlington with Base
Current Transfer Ratio (Min)	600% @ 500µA
Current Transfer Ratio (Max)	8000% @ 500µA
Output Current / Channel	60mA
Maximum Output Voltage	18V
Turn On / Turn Off Time	3µs, 34µs
Input Type	DC
Operating Temperature	0°C ~ 70°C
Package / Case	8-SMD, Gull Wing
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the HCPL-4701#500 is determined by the following critical parameters:

Primary Substitution Criteria:

Isolation voltage rating (minimum 3750Vrms required)
Single-channel configuration
Darlington output with base connection
Output current capability (60mA per channel)
Maximum output voltage (18V)
8-SMD Gull Wing package compatibility
DC input type

Substitution Categories:

Category 1: Parametric Equivalents (Broadcom HCPL-4701 Series) Parts HCPL-4701-500E and HCPL-4701-560E maintain identical electrical specifications to the main part, differing only in packaging format (Tape & Reel) and RoHS compliance status. These are direct functional replacements with active product status.

Category 2: Manufacturer Recommended Alternatives (Higher Isolation Voltage) Parts from Everlight Electronics (6N138S1 series) and Isocom Components (6N138SMT/R) provide 5000Vrms isolation, exceeding the 3750Vrms requirement. These maintain 60mA output current and Darlington with base output configuration but operate across extended or standard temperature ranges.

Category 3: Enhanced Performance Alternatives (Highest Isolation Voltage) Vishay 6N139 series parts (6N139-X009, 6N139-X009T, 6N139-X017T) deliver 5300Vrms isolation with faster switching times (600ns turn-on, 1.5µs turn-off) and extended temperature range (-55°C ~ 100°C). These represent the highest isolation rating and fastest response available within the substitute group.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ Test Current	Output Current	Max Output Voltage	Turn On / Turn Off Time	Operating Temperature	RoHS Status	Product Status
HCPL-4701#500	Broadcom Limited	3750Vrms	600% @ 500µA	60mA	18V	3µs, 34µs	0°C ~ 70°C	Non-compliant	Discontinued
HCPL-4701-500E	Broadcom Limited	3750Vrms	600% @ 500µA	60mA	18V	3µs, 34µs	0°C ~ 70°C	ROHS3 Compliant	Active
HCPL-4701-560E	Broadcom Limited	3750Vrms	600% @ 500µA	60mA	18V	3µs, 34µs	0°C ~ 70°C	ROHS3 Compliant	Active
6N138S1(TA)	Everlight Electronics Co Ltd	5000Vrms	300% @ 1.6mA	60mA	7V	1.4µs, 8µs	-40°C ~ 85°C	ROHS3 Compliant	Active
6N138S1(TA)-V	Everlight Electronics Co Ltd	5000Vrms	300% @ 1.6mA	60mA	7V	1.4µs, 8µs	-40°C ~ 85°C	ROHS3 Compliant	Active
6N138S1(TB)	Everlight Electronics Co Ltd	5000Vrms	300% @ 1.6mA	60mA	7V	1.4µs, 8µs	-40°C ~ 85°C	ROHS3 Compliant	Active
6N138S1(TB)-V	Everlight Electronics Co Ltd	5000Vrms	300% @ 1.6mA	60mA	7V	1.4µs, 8µs	-40°C ~ 85°C	ROHS3 Compliant	Active
6N138SMT/R	Isocom Components 2004 LTD	5000Vrms	300% @ 1.6mA	60mA	7V	10µs, 35µs (Max)	0°C ~ 70°C	ROHS3 Compliant	Active
6N139-X009	Vishay Semiconductor Opto Division	5300Vrms	500% @ 1.6mA	60mA	18V	600ns, 1.5µs	-55°C ~ 100°C	ROHS3 Compliant	Active
6N139-X009T	Vishay Semiconductor Opto Division	5300Vrms	500% @ 1.6mA	60mA	18V	600ns, 1.5µs	-55°C ~ 100°C	ROHS3 Compliant	Active
6N139-X017T	Vishay Semiconductor Opto Division	5300Vrms	500% @ 1.6mA	60mA	18V	600ns, 1.5µs	-55°C ~ 100°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications: HCPL-4701-500E and HCPL-4701-560E are the primary selections. Both maintain the exact electrical and thermal characteristics of the discontinued HCPL-4701#500 while offering active product status and ROHS3 compliance. These parts are sourced from the same manufacturer (Broadcom Limited) and require no circuit redesign.

For Applications Requiring Extended Temperature Range: The Everlight 6N138S1 series (TA, TA-V, TB, TB-V variants) and Isocom 6N138SMT/R provide operation from -40°C to 85°C or 0°C to 70°C respectively, with 5000Vrms isolation exceeding the original specification. Note that maximum output voltage is reduced to 7V compared to the original 18V rating. These are suitable where higher isolation voltage is beneficial and output voltage constraints are acceptable.

For High-Speed Applications with Maximum Isolation: The Vishay 6N139 series (X009, X009T, X017T) delivers the highest isolation voltage (5300Vrms), fastest switching response (600ns turn-on, 1.5µs turn-off), and widest operating temperature range (-55°C ~ 100°C). These parts maintain the 18V maximum output voltage of the original part and are appropriate for demanding isolation and speed requirements. Packaging options include Tube (X009), Tape & Reel (X009T), and Cut Tape with Digi-Reel (X017T).

Compliance Consideration: All substitute parts listed are ROHS3 compliant, addressing the non-compliant status of the discontinued HCPL-4701#500. Selection should account for system-level RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4701-500E and HCPL-4701-560E be used interchangeably with HCPL-4701#500? A: Yes. Both parts maintain identical electrical specifications including 3750Vrms isolation, 600-8000% current transfer ratio, 60mA output current, and 18V maximum output voltage. The primary differences are packaging format (Tape & Reel versus bulk) and RoHS3 compliance status. No circuit modifications are required.

Q: What is the key difference between Broadcom HCPL-4701 equivalents and Everlight 6N138S1 alternatives? A: The HCPL-4701 equivalents provide exact parameter matching at 3750Vrms isolation. The Everlight 6N138S1 series increases isolation voltage to 5000Vrms but reduces maximum output voltage from 18V to 7V and changes the current transfer ratio test condition from 500µA to 1.6mA. Selection depends on whether the 7V output voltage limit is acceptable in the target application.

Q: Why do Vishay 6N139 parts show faster switching times than the original HCPL-4701#500? A: The 6N139 series is a different product line with enhanced performance characteristics. Turn-on time is 600ns versus 3µs, and turn-off time is 1.5µs versus 34µs. This faster response is inherent to the 6N139 design and represents a performance upgrade suitable for applications requiring rapid isolation switching.

Q: Are all substitute parts available in the same 8-SMD Gull Wing package? A: Yes. All listed substitute parts use 8-SMD Gull Wing surface mount packaging, maintaining mechanical compatibility with the original HCPL-4701#500 footprint.

Q: What is the significance of the different Everlight part number suffixes (TA, TA-V, TB, TB-V)? A: These suffixes denote internal design variants within the 6N138S1 family. All variants maintain identical electrical specifications (5000Vrms isolation, 300% CTR @ 1.6mA, 60mA output, 7V max output). Selection among variants should be based on availability and supplier preference, as functional performance is equivalent.

Q: Which substitute part offers the widest operating temperature range? A: The Vishay 6N139 series (X009, X009T, X017T) operates from -55°C to 100°C, providing the widest temperature coverage. The Everlight 6N138S1 series operates from -40°C to 85°C. The Isocom 6N138SMT/R and Broadcom HCPL-4701 equivalents are limited to 0°C to 70°C.

Q: Can output voltage differences affect circuit compatibility? A: Yes. The original HCPL-4701#500 and Vishay 6N139 series support 18V maximum output voltage. The Everlight 6N138S1 and Isocom 6N138SMT/R are limited to 7V maximum output. Applications requiring output voltages above 7V must use either the Broadcom HCPL-4701 equivalents or Vishay 6N139 alternatives.

Q: What packaging options are available for the Vishay 6N139 series? A: Three packaging formats are provided: 6N139-X009 (Tube), 6N139-X009T (Tape & Reel), and 6N139-X017T (Cut Tape & Digi-Reel). Selection depends on procurement volume and handling requirements.

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