4N28M-V Optoisolator Equivalent & Substitute Parts

Part Overview

The 4N28M-V is a single-channel optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation with transistor output capability. The part is currently in Active product status with 989 units in stock.

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of the optoisolator category, specifically matching isolation voltage class, channel count, output type, and package form factor.

Substiute Parts

4N28M-V

Everlight Electronics Co LtdIn Stock: 10364N28M-V Datasheet

Current PartRFQ

4N28TVM

onsemiIn Stock: 8014N28TVM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N28M-V is determined by the following critical parameters:

Primary Matching Criteria:

• Number of Channels: 1 (single channel required)
• Output Type: Transistor with Base (functional output configuration)
• Package / Case: 6-DIP (0.400", 10.16mm) (mechanical compatibility)
• Mounting Type: Through Hole (board assembly compatibility)
• Input Type: DC (signal type compatibility)

Secondary Compatibility Parameters:

• Voltage - Isolation: Minimum 4170Vrms (substitutes must meet or exceed isolation class)
• Current Transfer Ratio (Min): 10% @ 10mA (functional performance threshold)
• Vce Saturation (Max): 500mV (output switching characteristics)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

The 4N28TVM from onsemi meets all primary matching criteria and secondary compatibility thresholds, qualifying it as a valid substitute within the optoisolator transistor with base output category.

Parameter Comparison

Engineering Selection Recommendations

4N28M-V Selection:

• Primary choice for new designs requiring 5000Vrms isolation voltage
• Supports output voltage applications up to 80V
• Operating temperature range -55°C to 110°C accommodates extended industrial specifications
• Active product status ensures continued availability and supply chain stability
• ROHS3 compliance meets current regulatory requirements

4N28TVM Selection (Substitute):

• Applicable when isolation voltage requirement is 4170Vrms or lower
• Suitable for applications with output voltage requirements up to 30V maximum
• Operating temperature range -40°C to 100°C limits use in extreme cold or high-temperature environments
• Product status is Last Time Buy; inventory availability is limited to existing stock (710 units)
• ROHS3 compliance maintained
• Faster switching characteristics (2µs vs 3µs) may provide performance advantage in time-critical applications

Substitution Constraints: The 4N28TVM cannot substitute the 4N28M-V in applications requiring isolation voltage exceeding 4170Vrms or output voltage exceeding 30V. Temperature range differences must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 4N28TVM replace the 4N28M-V in all applications?

A: No. The 4N28TVM has lower isolation voltage (4170Vrms vs 5000Vrms) and lower maximum output voltage (30V vs 80V). Substitution is valid only when application requirements do not exceed these lower ratings.

Q: What is the difference in isolation voltage between these parts?

A: The 4N28M-V provides 5000Vrms isolation, while the 4N28TVM provides 4170Vrms isolation. The 4N28M-V offers approximately 830Vrms additional isolation margin. Applications requiring the full 5000Vrms specification cannot use the 4N28TVM.

Q: Are the packages identical?

A: Yes. Both parts use 6-DIP (0.400", 10.16mm) through-hole packages with identical pin configurations, enabling direct board-level substitution from a mechanical standpoint.

Q: What are the switching speed differences?

A: The 4N28TVM has faster turn-on and turn-off times (2µs each) compared to the 4N28M-V (3µs each). This 1µs improvement may be beneficial in high-frequency switching applications.

Q: Why is the 4N28TVM marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer (onsemi) is discontinuing this part number. Existing inventory (710 units) represents the final available stock. The 4N28M-V, with Active status, is the recommended choice for long-term supply security.

Q: What is the operating temperature impact?

A: The 4N28M-V operates from -55°C to 110°C, while the 4N28TVM operates from -40°C to 100°C. Applications requiring operation below -40°C or above 100°C must use the 4N28M-V.

Q: Are both parts RoHS compliant?

A: Yes. Both the 4N28M-V and 4N28TVM are ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.

Q: What is the maximum output voltage for each part?

A: The 4N28M-V supports output voltages up to 80V, while the 4N28TVM supports up to 30V. Applications requiring output voltages between 30V and 80V must use the 4N28M-V.