TLP127(YASK-TPL,F) Equivalent & Substitute Parts

Part Overview

The TLP127(YASK-TPL,F) is a single-channel optoisolator with Darlington output manufactured by Toshiba Semiconductor and Storage. This component provides 2500Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation with Darlington output configuration. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

TLP127(YASK-TPL,F)

Toshiba Semiconductor and StorageIn Stock: 1079TLP127(YASK-TPL,F) Datasheet

Current PartRFQ

TLP187(TPL,E

Toshiba Semiconductor and StorageIn Stock: 2269TLP187(TPL,E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP127(YASK-TPL,F) is determined by the following critical parameters:

• Single-channel Darlington output optoisolator configuration
• Isolation voltage rating of 2500Vrms or higher
• Current transfer ratio minimum of 1000% @ 1mA
• Maximum output voltage of 300V
• Output current capability of 150mA per channel
• Surface mount packaging with 4-lead configuration
• DC input type
• Operating temperature range compatibility

The TLP187(TPL,E) qualifies as a direct substitute based on these parameters. While the TLP187 features enhanced isolation voltage (3750Vrms) and extended operating temperature range (-55°C ~ 110°C), it maintains all critical electrical characteristics and functional equivalence required for the TLP127 application.

Parameter Comparison

Engineering Selection Recommendations

The TLP187(TPL,E) is the qualified substitute for the obsolete TLP127(YASK-TPL,F). Selection of the TLP187 is supported by the following factors:

• Active product status ensures ongoing availability and manufacturing support
• ROHS3 compliance of the TLP187 meets current environmental and regulatory requirements
• Enhanced isolation voltage (3750Vrms vs. 2500Vrms) provides additional safety margin in high-voltage isolation applications
• Extended operating temperature range (-55°C ~ 110°C vs. -55°C ~ 100°C) accommodates broader thermal environments
• Identical electrical performance across all critical parameters: current transfer ratio, output voltage, output current, and switching characteristics
• Both components share EAR99 export classification and unlimited moisture sensitivity rating

Package geometry differs between the two parts (6-SMD Gull Wing vs. 6-SOIC), requiring PCB layout verification during substitution implementation.

Frequently Asked Questions (FAQ)

Q: Can the TLP187(TPL,E) directly replace the TLP127(YASK-TPL,F) in existing designs?

A: Electrical substitution is valid based on matching isolation voltage (3750Vrms exceeds 2500Vrms requirement), current transfer ratio (1000% @ 1mA), output voltage (300V), and output current (150mA). Package geometry differs; PCB footprint modification is required.

Q: What is the significance of the higher isolation voltage in the TLP187?

A: The TLP187 provides 3750Vrms isolation versus 2500Vrms in the TLP127. This represents a 50% increase in isolation capability, offering enhanced safety margin in applications requiring galvanic isolation between high-voltage circuits.

Q: Are there compatibility concerns with the different package types?

A: The TLP127 uses 6-SMD (4 Leads) Gull Wing packaging while the TLP187 uses 6-SOIC (0.173", 4.40mm Width) packaging. Both are surface mount configurations with 4 leads, but PCB footprint and land pattern design must be updated to accommodate the different package geometry.

Q: Does the TLP187 meet current regulatory compliance standards?

A: Yes. The TLP187(TPL,E) is ROHS3 compliant and carries EAR99 export classification, meeting current environmental and regulatory requirements. The obsolete TLP127 does not specify RoHS compliance status.

Q: Are the switching characteristics identical between these parts?

A: Yes. Both components share identical turn-on/turn-off times (50µs, 15µs) and rise/fall times (40µs, 15µs), ensuring equivalent performance in DC input switching applications.

Q: What is the impact of the 0.1V difference in forward voltage?

A: The TLP187 forward voltage is 1.25V typical versus 1.15V for the TLP127, a 0.1V difference. This minor variation is within normal component tolerance and does not affect circuit functionality in standard optoisolator applications.