4N26G Optoisolator - Equivalent & Substitute Parts

Part Overview

The 4N26G is an optoisolator transistor manufactured by Isocom Components 2004 LTD, designed for single-channel isolation applications requiring transistor output with base connection. This component operates at 7.5Vpk isolation voltage and is rated for 50mA output current per channel. The part is currently active in production with 628 units in stock. Alternative models may be required due to inventory constraints, regional availability, or specific procurement requirements.

Substiute Parts

4N26G

Isocom Components 2004 LTDIn Stock: 7194N26G Datasheet

Current PartRFQ

4N25XG

Isocom Components 2004 LTDIn Stock: 8224N25XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 4N26G has one parametric equivalent substitute: the 4N25XG. Substitution eligibility is determined by the following critical parameters that must match exactly:

• Number of Channels: 1
• Voltage - Isolation: 7.5Vpk
• Current Transfer Ratio (Min): 20% @ 10mA
• Output Type: Transistor with Base
• Voltage - Output (Max): 30V
• Current - Output / Channel: 50mA
• Voltage - Forward (Vf) (Typ): 1.2V
• Current - DC Forward (If) (Max): 60mA
• Vce Saturation (Max): 500mV
• Operating Temperature Range: -55°C ~ 100°C
• Package / Case: 6-DIP (0.400", 10.16mm)
• Input Type: DC

The 4N25XG meets all these criteria and is therefore a direct parametric equivalent suitable for substitution in applications where the 4N26G is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 4N26G and 4N25XG are active products manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The 4N25XG is a direct substitute with 791 units currently in stock compared to 628 units for the 4N26G. Selection between these parts should be based on procurement availability and lead time requirements, as all functional and compliance parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 4N25XG be used as a direct replacement for the 4N26G?

A: Yes. The 4N25XG is a parametric equivalent with identical electrical characteristics, isolation voltage, output current rating, temperature range, and 6-DIP package configuration. No circuit modifications are required.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts carry identical ROHS3 compliance status, REACH unaffected designation, and MSL rating of 1 (Unlimited). Both are active products from the same manufacturer.

Q: What determines whether a part can substitute for the 4N26G?

A: Substitution requires matching all critical parameters: single-channel configuration, 7.5Vpk isolation voltage, 20% minimum current transfer ratio at 10mA, transistor output with base, 30V maximum output voltage, 50mA output current per channel, 1.2V typical forward voltage, 60mA maximum DC forward current, 500mV maximum Vce saturation, -55°C to 100°C operating range, and 6-DIP through-hole package.

Q: Are the parts pin-compatible?

A: Yes. Both the 4N26G and 4N25XG use the 6-DIP (0.400", 10.16mm) package with identical pinout for through-hole mounting applications.

Q: What is the current inventory status?

A: The 4N26G has 628 units in stock, while the 4N25XG has 791 units in stock, both listed as new original components.