TLP781F(D4GRL-T7,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4GRL-T7,F is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This through-hole 4-DIP component provides 5000Vrms isolation and is designed for DC input applications requiring galvanic isolation. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

TLP781F(D4GRL-T7,F

Toshiba Semiconductor and StorageIn Stock: 1188TLP781F(D4GRL-T7,F Datasheet

Current PartRFQ

TLP785F(D4GLT7,F

Toshiba Semiconductor and StorageIn Stock: 4411TLP785F(D4GLT7,F Datasheet

SimilarRFQ

TLP785F(GRL-T7,F

Toshiba Semiconductor and StorageIn Stock: 1014TLP785F(GRL-T7,F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TLP781F(D4GRL-T7,F is determined by the following critical parameters:

Isolation voltage: 5000Vrms (mandatory match) Number of channels: 1 (mandatory match) Output type: Transistor (mandatory match) Input type: DC (mandatory match) Maximum output voltage: 80V (mandatory match) Maximum output current: 50mA (mandatory match) Vce saturation: 400mV (mandatory match)

Substitute parts are grouped into two categories:

Parametric Equivalent: Maintains identical electrical performance specifications and through-hole mounting, suitable for direct replacement in existing designs.

Similar Substitute: Offers equivalent isolation and output characteristics but differs in mounting technology (surface mount vs. through hole) and operating temperature range, requiring design adaptation.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement in existing through-hole designs: Select TLP785F(GRL-T7,F. This parametric equivalent maintains identical electrical specifications, operating temperature range, and 4-DIP through-hole packaging. Both parts are manufactured by Toshiba with matching isolation voltage, output characteristics, and switching performance. The TLP785F(GRL-T7,F is currently in active production status, ensuring long-term availability.

For new designs or PCB redesign scenarios: TLP785F(D4GLT7,F offers an active production alternative with surface-mount technology. This substitute maintains the same isolation voltage, output voltage/current ratings, and switching times. Selection of this part requires PCB layout modification to accommodate 4-SMD gull-wing packaging and acceptance of the reduced operating temperature range (-25°C ~ 85°C versus -55°C ~ 110°C). The TLP785F(D4GLT7,F is RoHS compliant and carries higher inventory availability.

Compliance considerations: Both substitute parts are manufactured by Toshiba with EAR99 ECCN classification and HTSUS code 8541.49.8000, matching the original part's regulatory status.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(GRL-T7,F replace TLP781F(D4GRL-T7,F in existing assemblies?

A: Yes. The TLP785F(GRL-T7,F is a parametric equivalent with identical electrical specifications, operating temperature range, and 4-DIP through-hole package dimensions. No circuit modifications or PCB changes are required.

Q: What are the key differences between TLP785F(GRL-T7,F and TLP785F(D4GLT7,F?

A: The primary differences are mounting technology and operating temperature range. TLP785F(GRL-T7,F uses through-hole 4-DIP packaging with -55°C ~ 110°C operation. TLP785F(D4GLT7,F uses surface-mount 4-SMD gull-wing packaging with -25°C ~ 85°C operation. Both maintain identical isolation voltage, output ratings, and switching performance.

Q: Is TLP785F(D4GLT7,F suitable for applications requiring -55°C operation?

A: No. The TLP785F(D4GLT7,F operating temperature range is -25°C ~ 85°C. Applications requiring -55°C minimum operation must use TLP785F(GRL-T7,F or equivalent through-hole alternatives.

Q: What is the impact of the different Current Transfer Ratio ranges on substitution?

A: The TLP781F(D4GRL-T7,F and TLP785F(GRL-T7,F both specify 100-200% CTR @ 5mA. The TLP785F(D4GLT7,F specifies 50-600% CTR @ 5mA. The wider range in the surface-mount variant reflects manufacturing process differences but does not prevent substitution in applications designed for the 100-200% specification, as this range falls within the acceptable limits.

Q: Does the reduced maximum forward current (25mA vs. 60mA) in TLP785F(D4GLT7,F affect substitution?

A: The reduced If(Max) specification in TLP785F(D4GLT7,F may impact applications operating at the upper input current limits of the original design. Circuit analysis is required to confirm that input current requirements do not exceed 25mA for this substitute.

Q: Are there RoHS compliance differences between these parts?

A: TLP785F(D4GLT7,F is specified as RoHS Compliant. RoHS status is not specified for TLP781F(D4GRL-T7,F and TLP785F(GRL-T7,F. Verify RoHS requirements with your procurement or quality department before final part selection.