4N28S(TA)-V Equivalent & Substitute Parts

Part Overview

The 4N28S(TA)-V is an optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 6-SMD surface mount package. The device is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameter ranges for optoisolator applications, particularly when the primary part faces inventory constraints or when alternative sourcing is required for supply chain continuity.

Substiute Parts

4N28S(TA)-V

Everlight Electronics Co LtdIn Stock: 8104N28S(TA)-V Datasheet

Current PartRFQ

4N28SM

onsemiIn Stock: 28004N28SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 4N28S(TA)-V are identified based on the following critical parameters that define functional equivalence in optoisolator applications:

Primary Substitution Criteria:

• Number of Channels: Must equal 1
• Output Type: Must be Transistor with Base
• Package / Case: Must be 6-SMD, Gull Wing
• Mounting Type: Must be Surface Mount
• Current Transfer Ratio (Min): Must meet or exceed 10% @ 10mA
• Vce Saturation (Max): Must not exceed 500mV
• Current - DC Forward (If) (Max): Must support 60mA minimum
• RoHS Status: Must be ROHS3 Compliant

Secondary Compatibility Parameters:

• Voltage - Isolation: Minimum acceptable isolation voltage for the application
• Voltage - Output (Max): Maximum output voltage rating
• Operating Temperature Range: Must encompass application requirements
• Voltage - Forward (Vf) (Typ): Input diode forward voltage characteristics

The 4N28SM from onsemi is identified as a substitute part based on matching the core package, channel configuration, output type, and electrical performance within acceptable ranges for optoisolator transistor applications.

Parameter Comparison

Engineering Selection Recommendations

4N28S(TA)-V Selection Criteria:

• Primary choice when isolation voltage requirement is 5000Vrms or higher
• Required when output voltage must reach 80V maximum
• Suitable for extended temperature range applications requiring -55°C minimum operating temperature
• Active product status with established supply chain (726 Pcs inventory)
• ROHS3 compliant and EAR99 classified

4N28SM Selection Criteria:

• Acceptable substitute when isolation voltage requirement is 4170Vrms or lower
• Suitable when maximum output voltage of 30V is sufficient for the application
• Operating temperature range of -40°C to 100°C meets standard industrial requirements
• Active product status with higher inventory availability (2782 Pcs)
• ROHS3 compliant and EAR99 classified
• Faster switching performance (2µs turn on/off versus 3µs)
• Packaging supplied in Tube format

Both parts maintain identical current transfer ratio specifications, saturation voltage characteristics, and forward current ratings. Selection between these optoisolator transistor parts depends on specific isolation voltage, output voltage, and operating temperature requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the 4N28SM replace the 4N28S(TA)-V in all applications?

A: The 4N28SM can replace the 4N28S(TA)-V only when the application isolation voltage requirement does not exceed 4170Vrms and the maximum output voltage does not exceed 30V. The operating temperature range of -40°C to 100°C must also encompass the application requirements. Both parts share identical channel configuration, output type, package format, and electrical performance characteristics for current transfer ratio and saturation voltage.

Q: What are the key differences between these optoisolator transistor parts?

A: The primary differences are isolation voltage rating (5000Vrms versus 4170Vrms), maximum output voltage (80V versus 30V), operating temperature range (-55°C to 110°C versus -40°C to 100°C), switching speed (3µs versus 2µs), and packaging format (standard versus Tube). Both maintain 6-SMD Gull Wing surface mount configuration and identical current transfer ratio specifications.

Q: Are both parts ROHS3 compliant?

A: Yes, both the 4N28S(TA)-V and 4N28SM are ROHS3 compliant with MSL rating of 1 (Unlimited). Both carry EAR99 export classification and HTSUS code 8541.49.8000.

Q: What is the significance of the 6-SMD Gull Wing package format?

A: The 6-SMD Gull Wing package is a surface mount configuration suitable for automated PCB assembly processes. Both substitute parts use identical package geometry, allowing direct footprint compatibility on printed circuit boards without layout modifications.

Q: How do the current transfer ratio specifications compare?

A: Both parts specify a minimum current transfer ratio of 10% at 10mA input current. This identical specification ensures equivalent optical coupling efficiency and input-to-output current transfer characteristics across both optoisolator transistor options.

Q: What is the Vce saturation voltage significance?

A: Both parts specify a maximum Vce saturation voltage of 500mV. This parameter defines the voltage drop across the transistor output when fully saturated, directly affecting power dissipation and output voltage swing characteristics in the application circuit.