TLP626(LF1,F) Equivalent & Substitute Parts

Part Overview

The TLP626(LF1,F) is an optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-SMD surface mount package. The device is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility while offering active product status for long-term availability.

Substiute Parts

TLP626(LF1,F)

Toshiba Semiconductor and StorageIn Stock: 1123TLP626(LF1,F) Datasheet

Current PartRFQ

TLP620M(LF1,E

Toshiba Semiconductor and StorageIn Stock: 820TLP620M(LF1,E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP626(LF1,F) is based on the following critical parameters that must remain constant or compatible:

Mandatory Matching Parameters:

• Voltage - Isolation: 5000Vrms (electrical isolation requirement)
• Number of Channels: 1 (functional configuration)
• Output Type: Transistor (output stage architecture)
• Mounting Type: Surface Mount (assembly compatibility)
• Package / Case: 4-SMD (0.300", 7.62mm) (physical footprint compatibility)
• Input Type: AC, DC (signal compatibility)

Allowable Variation Parameters:

• Current Transfer Ratio: May vary within device specifications
• Turn On / Turn Off Time: May vary within device specifications
• Rise / Fall Time: May vary within device specifications
• Voltage - Output (Max): May increase (backward compatible)
• Voltage - Forward (Vf): Minor variations acceptable
• Current - DC Forward (If): May decrease (conservative design)
• Vce Saturation: May decrease (improved performance)
• Operating Temperature Range: May expand (enhanced capability)
• Product Status: Active status preferred for obsolete parts

The TLP620M(LF1,E) qualifies as a substitute because it maintains all mandatory parameters while offering improved electrical characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLP620M(LF1,E)

The TLP620M(LF1,E) is the manufacturer-recommended substitute for the obsolete TLP626(LF1,F). This part maintains all critical electrical isolation and mechanical compatibility requirements while offering the following advantages:

Product Status: The TLP620M(LF1,E) carries active product status, ensuring long-term availability, ongoing manufacturing support, and compliance with current supply chain requirements. The TLP626(LF1,F) is obsolete and subject to discontinuation without notice.

Electrical Compatibility: Both devices provide 5000Vrms isolation with single-channel transistor output in identical 4-SMD packaging. The TLP620M(LF1,E) demonstrates improved switching performance with faster turn-on/turn-off times (3µs vs. 10µs) and faster rise/fall times (2µs/3µs vs. 8µs/8µs), making it suitable for applications requiring higher switching speeds.

Voltage and Current Ratings: The TLP620M(LF1,E) provides higher maximum output voltage (80V vs. 55V) and lower saturation voltage (300mV vs. 400mV), offering improved performance margins in isolation circuits. Output current capacity remains identical at 50mA per channel.

Temperature Range: The TLP620M(LF1,E) extends the operating temperature range to -55°C ~ 125°C, providing enhanced thermal capability compared to the original part's -55°C ~ 100°C range.

Compliance and Certifications: Both parts carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, ensuring regulatory compliance continuity.

Frequently Asked Questions (FAQ)

Q: Can the TLP620M(LF1,E) be used as a direct replacement for the TLP626(LF1,F)?

A: Yes. The TLP620M(LF1,E) maintains identical isolation voltage (5000Vrms), channel configuration (1 channel), output type (transistor), and physical package (4-SMD, 0.300" / 7.62mm). Both devices accept AC and DC input signals and support surface mount assembly. The substitute part is electrically and mechanically compatible for direct PCB substitution.

Q: What are the key differences between these parts?

A: The primary differences are product status and performance characteristics. The TLP620M(LF1,E) is an active product with faster switching times (3µs turn-on vs. 10µs), higher output voltage rating (80V vs. 55V), lower saturation voltage (300mV vs. 400mV), and an extended operating temperature range (-55°C to 125°C vs. -55°C to 100°C). These represent performance improvements rather than compatibility issues.

Q: Are the package dimensions identical?

A: Yes. Both the TLP626(LF1,F) and TLP620M(LF1,E) use the 4-SMD package with 0.300" (7.62mm) dimensions. PCB footprints are identical, and no layout modifications are required for substitution.

Q: Does the TLP620M(LF1,E) maintain the same isolation voltage?

A: Yes. Both parts provide 5000Vrms isolation rating, meeting identical galvanic isolation requirements for high-voltage applications.

Q: What is the significance of the TLP626(LF1,F) being obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support for this part. The TLP620M(LF1,E) is the active equivalent, ensuring continued availability, manufacturing consistency, and compliance with current supply chain standards.

Q: Are there any circuit design changes required when substituting the TLP620M(LF1,E)?

A: No circuit design changes are required. The substitute part maintains identical isolation voltage, channel count, output type, and package configuration. The improved switching performance and voltage ratings of the TLP620M(LF1,E) are backward compatible with designs using the TLP626(LF1,F).

Q: How do the current transfer ratios compare?

A: The parts are specified under different test conditions. The TLP626(LF1,F) specifies 100-1200% at 1mA input current, while the TLP620M(LF1,E) specifies 50-600% at 5mA input current. These different test conditions reflect different device characterization approaches but do not affect substitution compatibility.