H11G3 Optoisolator Darlington with Base Output 5300Vrms Equivalent & Substitute Parts

Part Overview

The H11G3 is an optoisolator with Darlington output and base connection, rated for 5300Vrms isolation voltage. Manufactured by onsemi in a 6-DIP through-hole package, this component provides galvanic isolation for DC input signals with Darlington output configuration. The H11G3 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain compatibility across isolation voltage, output type, package form factor, and thermal operating range to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	H11G3 Value
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	200% @ 1mA
Output Type	Darlington with Base
Voltage - Output (Max)	55V
Voltage - Forward (Vf) (Typ)	1.3V
Current - DC Forward (If) (Max)	60 mA
Vce Saturation (Max)	1.2V
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Package / Case	6-DIP (0.300", 7.62mm)
Input Type	DC
Turn On / Turn Off Time (Typ)	5µs, 100µs
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution logic for the H11G3 is based on the following critical parameters that must align for functional equivalence:

Primary Substitution Criteria:

Isolation voltage rating (5300Vrms or higher)
Output configuration (Darlington with Base)
Single-channel configuration
6-DIP through-hole package with 0.300" (7.62mm) pitch
DC input type
Operating temperature range (-55°C to 100°C minimum)

Secondary Compatibility Factors:

Current Transfer Ratio (minimum 50% @ 10mA acceptable for lower-speed applications)
Maximum output voltage (30V to 55V acceptable depending on circuit requirements)
Forward voltage and saturation characteristics (1.0V to 1.3V typical range)
Turn-on/turn-off timing (5µs turn-on, 40µs to 100µs turn-off acceptable)

Substitute parts are grouped into two categories: onsemi/Vishay obsolete parts with identical 5300Vrms isolation ratings, and Everlight active production parts with 5000Vrms isolation ratings. Parts with 5000Vrms isolation are suitable substitutes where the lower isolation voltage meets circuit requirements.

Parameter Comparison

Parameter	H11G3	4N29	4N29-V	4N30	4N30-V	4N31	4N31-V	4N32	4N32-V	4N33	4N33-V
Manufacturer	onsemi	Quality Technologies	Everlight	onsemi	Everlight	onsemi	Everlight	Vishay	Everlight	onsemi	Everlight
Voltage - Isolation	5300Vrms	5300Vrms	5000Vrms	5300Vrms	5000Vrms	5300Vrms	5000Vrms	5300Vrms	5000Vrms	5300Vrms	5000Vrms
Current Transfer Ratio (Min)	200% @ 1mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	100% @ 10mA	50% @ 10mA	50% @ 10mA	500% @ 10mA	500% @ 10mA	500% @ 10mA	500% @ 10mA
Output Type	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base	Darlington with Base
Voltage - Output (Max)	55V	30V	55V	30V	55V	30V	55V	30V	55V	30V	55V
Current - Output / Channel	—	150mA	—	150mA	—	150mA	—	100mA	—	150mA	—
Voltage - Forward (Vf) (Typ)	1.3V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.25V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	60 mA	80 mA	60 mA	80 mA	60 mA	80 mA	60 mA	60 mA	60 mA	80 mA	60 mA
Vce Saturation (Max)	1.2V	1V	1V	1V	1V	1.2V	1.2V	1V (Typ)	1V	1V	1V
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-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	6-DIP (0.300", 7.62mm)	6-DIP (0.400", 10.16mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)
Turn On / Turn Off Time (Typ)	5µs, 100µs	5µs, 40µs (Max)	5µs, 40µs (Max)	5µs, 40µs (Max)	5µs, 40µs (Max)	5µs, 40µs (Max)	5µs, 40µs (Max)	5µs, 100µs (Max)	5µs, 100µs (Max)	5µs, 100µs (Max)	5µs, 100µs (Max)
Product Status	Obsolete	Active	Active	Obsolete	Active	Obsolete	Active	Obsolete	Active	Obsolete	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Isolation Voltage - 5300Vrms):

The 4N33 from onsemi provides the closest electrical match to the H11G3, with identical 5300Vrms isolation voltage, 6-DIP package, and Darlington output configuration. However, the 4N33 is also obsolete. For active production designs, the 4N32 from Vishay Semiconductor Opto Division offers 5300Vrms isolation with superior current transfer ratio (500% @ 10mA) and is ROHS3 compliant, though it is also classified as obsolete.

For Active Production (Recommended):

The Everlight 4N33-V provides the most suitable active production alternative, maintaining 5000Vrms isolation (acceptable where circuit isolation requirements do not exceed this threshold), identical 6-DIP (0.300", 7.62mm) package, and ROHS3 compliance. The 4N32-V from Everlight offers equivalent specifications with higher current transfer ratio (500% @ 10mA) and is actively produced.

For applications requiring 5300Vrms isolation with active production status, the 4N30-V and 4N31-V from Everlight provide alternatives, though with reduced maximum output voltage (55V vs. 30V on onsemi variants) and lower current transfer ratios (100% and 50% respectively).

Package Compatibility Note:

The 4N29 from Quality Technologies uses a 6-DIP (0.400", 10.16mm) package, which differs from the H11G3 standard 6-DIP (0.300", 7.62mm) pitch. This part is not recommended for direct PCB replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the 4N29-V replace the H11G3 directly on the PCB?

A: Yes. The 4N29-V maintains the same 6-DIP (0.300", 7.62mm) package pitch as the H11G3. Electrical parameters are compatible for most applications, with the exception of isolation voltage (5000Vrms vs. 5300Vrms). Verify that your circuit isolation requirements do not exceed 5000Vrms.

Q: What is the difference between 5300Vrms and 5000Vrms isolation ratings?

A: Both ratings provide high-voltage galvanic isolation suitable for industrial and power management applications. The 5300Vrms rating provides additional isolation margin. Select 5000Vrms parts only if your circuit design specifications do not require the higher isolation threshold.

Q: Why is the 4N29 not recommended as a substitute?

A: The 4N29 uses a 6-DIP (0.400", 10.16mm) package, which has a different pin pitch than the H11G3 (0.300", 7.62mm). This package incompatibility prevents direct PCB replacement without circuit board redesign.

Q: Are Everlight parts (4N30-V, 4N31-V, 4N32-V, 4N33-V) suitable for new designs?

A: Yes. Everlight parts are actively produced and ROHS3 compliant, making them suitable for new production designs. Verify that the 5000Vrms isolation voltage meets your circuit requirements, and confirm that output voltage and current transfer ratio specifications align with your application.

Q: How do current transfer ratios affect circuit performance?

A: Current transfer ratio determines the output current relative to input current. The H11G3 specifies 200% @ 1mA. Substitute parts with lower ratios (50% to 100%) require higher input current to achieve equivalent output switching. Parts with higher ratios (500%) provide faster switching response and lower input current requirements. Select based on your input signal characteristics and output load requirements.

Q: What is the significance of Vce saturation voltage?

A: Vce saturation (1.0V to 1.2V) represents the voltage drop across the Darlington output when fully conducting. Lower saturation voltage reduces power dissipation in the output stage. The H11G3 specifies 1.2V maximum; most substitutes offer 1.0V, providing improved efficiency.

Q: Can I use a part with lower maximum output voltage (30V vs. 55V)?

A: Only if your circuit output voltage does not exceed 30V. The H11G3 supports up to 55V output. Substitute parts with 30V maximum ratings (4N29, 4N30, 4N31, 4N32) are suitable only for lower-voltage applications. Everlight variants (4N30-V, 4N31-V, 4N32-V, 4N33-V) support 55V output.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. For new production designs subject to environmental regulations, select ROHS3 compliant parts. All Everlight variants listed are ROHS3 compliant.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message