4N26300 Equivalent & Substitute Parts

Part Overview

The 4N26300 is an optoisolator transistor with base output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-DIP package. This component provides galvanic isolation for DC input signals with transistor output capability. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

4N26300

onsemiIn Stock: 9454N26300 Datasheet

Current PartRFQ

4N26

Texas InstrumentsIn Stock: 5217894N26 Datasheet

SimilarRFQ

4N26

Texas InstrumentsIn Stock: 5217894N26 Datasheet

SimilarRFQ

4N26X

onsemiIn Stock: 11574N26X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N26300 is determined by the following critical parameters:

• Isolation Voltage: Minimum 5000Vrms (4N26300 specifies 5300Vrms)
• Number of Channels: 1 channel required
• Output Type: Transistor with Base configuration
• Package: 6-DIP (0.300", 7.62mm) through-hole mounting
• Current Transfer Ratio: Minimum 20% @ 10mA
• Operating Temperature Range: -55°C to 100°C minimum
• Input Type: DC

The 4N26 from Texas Instruments and 4N26X from onsemi meet these substitution criteria. Both maintain the same channel count, output configuration, package form factor, and core electrical specifications required for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 4N26 (Texas Instruments)

The Texas Instruments 4N26 is the recommended substitute for new designs and ongoing procurement. This part maintains active product status with substantial inventory availability (521,745 units). While isolation voltage is rated at 5000Vrms compared to the 4N26300's 5300Vrms, this remains within acceptable margins for most applications requiring 5kV isolation. The 4N26 offers superior output voltage capability (70V maximum versus 30V), providing greater design flexibility. Both parts share identical current transfer ratio specifications, saturation characteristics, and operating temperature ranges.

Secondary Substitute: 4N26X (onsemi)

The 4N26X from onsemi provides an alternative when manufacturer continuity is required. This part matches the 4N26300 in isolation voltage (5300Vrms), forward voltage characteristics, and maximum forward current (100mA). However, the 4N26X carries obsolete product status, limiting long-term availability. Use this substitute only when the 4N26 cannot meet specific design constraints.

Compliance Considerations

The 4N26 (Texas Instruments) is REACH Affected, whereas the 4N26300 and 4N26X are REACH Unaffected. Regulatory requirements for your application region must be evaluated. Both substitute parts maintain EAR99 export classification and identical HTSUS codes.

Frequently Asked Questions (FAQ)

Q: Can the 4N26 replace the 4N26300 directly?

A: Yes. Both parts are pin-compatible 6-DIP packages with identical channel configuration and transistor output topology. The 4N26 meets or exceeds all critical electrical parameters required for substitution, including isolation voltage (5000Vrms minimum), current transfer ratio (20% @ 10mA), and operating temperature range (-55°C to 100°C).

Q: What is the isolation voltage difference between 4N26300 and 4N26?

A: The 4N26300 specifies 5300Vrms isolation while the 4N26 specifies 5000Vrms. This 300Vrms difference represents a 5.7% variance. For applications requiring exactly 5300Vrms isolation, the 4N26X provides matching specifications.

Q: Are there package differences between these parts?

A: No. All three parts use identical 6-DIP (0.300", 7.62mm) through-hole packaging with the same pin configuration, enabling direct PCB substitution without layout modifications.

Q: Why is the 4N26 preferred over the 4N26X?

A: The 4N26 (Texas Instruments) maintains active product status with high inventory levels, ensuring long-term availability and supply chain stability. The 4N26X is obsolete, presenting procurement risk for future production runs.

Q: What output voltage capability differences exist?

A: The 4N26 supports maximum output voltage of 70V, while both the 4N26300 and 4N26X are limited to 30V. This makes the 4N26 suitable for higher voltage switching applications, though all three parts are functionally equivalent for circuits designed within the 30V envelope.

Q: Are there forward current differences?

A: Yes. The 4N26300 and 4N26X support 100mA maximum DC forward current, while the 4N26 is rated for 60mA. For LED drive circuits requiring currents above 60mA, the 4N26X or 4N26300 are required.