DSTF30120C Equivalent & Substitute Parts

Part Overview

The DSTF30120C is a Schottky diode array manufactured by Littelfuse Inc., configured as a 1 Pair Common Cathode arrangement with 120 V reverse voltage rating and 15 A average rectified current per diode. The component is packaged in TO-220-3 Full Pack with isolated tab configuration for through-hole mounting applications. This part is currently Active in product status with 730 pieces in stock inventory.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements while maintaining electrical and mechanical compatibility within the defined parameter ranges.

Substiute Parts

DSTF30120C

Littelfuse Inc.In Stock: 798DSTF30120C Datasheet

Current PartRFQ

SDT20120CTFP

Diodes IncorporatedIn Stock: 798SDT20120CTFP Datasheet

MFR RecommendedRFQ

SDT30120CTFP

Diodes IncorporatedIn Stock: 2012SDT30120CTFP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSTF30120C is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 120 V
• Mounting Type: Through Hole
• Package / Case: TO-220-3 Full Pack, Isolated Tab
• Operating Temperature Range: -55°C to 150°C

Allowable Parameter Variation:

• Current - Average Rectified (Io): Equal to or greater than 15 A
• Voltage - Forward (Vf) (Max): Within acceptable forward voltage characteristics for Schottky technology
• Current - Reverse Leakage @ Vr: Within acceptable leakage specifications
• RoHS and REACH Compliance: Equivalent or superior compliance status

The substitute parts identified below satisfy all mandatory matching parameters and fall within allowable electrical performance ranges for direct substitution in applications designed for the DSTF30120C.

Parameter Comparison

Engineering Selection Recommendations

SDT30120CTFP (Diodes Incorporated) - Primary Equivalent

The SDT30120CTFP is a direct functional equivalent to the DSTF30120C. Both components share identical electrical ratings for reverse voltage (120 V), average rectified current (15 A per diode), and operating temperature range (-55°C to 150°C). The SDT30120CTFP exhibits superior reverse leakage characteristics (100 µA versus 800 µA at 120 V) and lower forward voltage drop (930 mV versus 970 mV at 15 A), resulting in improved thermal efficiency. Both parts are ROHS3 compliant and REACH unaffected. The SDT30120CTFP maintains higher inventory availability (2000 pieces) and is suitable for direct pin-for-pin replacement in all applications designed for the DSTF30120C.

SDT20120CTFP (Diodes Incorporated) - Current-Limited Substitute

The SDT20120CTFP is a substitute option for applications where the average rectified current requirement does not exceed 10 A per diode. This part maintains identical reverse voltage rating (120 V), diode configuration (1 Pair Common Cathode), and operating temperature range (-55°C to 150°C). The SDT20120CTFP provides superior reverse leakage performance (80 µA at 120 V) and lower forward voltage drop (880 mV at 10 A). This component is suitable only for designs where the 10 A current rating satisfies the application requirement. Both parts are ROHS3 compliant and REACH unaffected.

All substitute parts maintain identical mechanical compatibility through TO-220-3 Full Pack, Isolated Tab packaging and through-hole mounting configuration.

Frequently Asked Questions (FAQ)

Q: Can SDT30120CTFP be used as a direct replacement for DSTF30120C?

A: Yes. The SDT30120CTFP is a direct functional equivalent. Both components share identical electrical ratings (120 V reverse voltage, 15 A average rectified current per diode), identical diode configuration (1 Pair Common Cathode), identical package type (TO-220-3 Full Pack, Isolated Tab), and identical operating temperature range (-55°C to 150°C). Pin-for-pin replacement is supported.

Q: What is the difference between SDT30120CTFP and SDT20120CTFP?

A: The primary difference is the average rectified current rating. The SDT30120CTFP is rated for 15 A per diode, matching the DSTF30120C specification. The SDT20120CTFP is rated for 10 A per diode. Both share identical reverse voltage (120 V), diode configuration, package type, and operating temperature range. The SDT20120CTFP is suitable only for applications where the 10 A current rating is sufficient.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use identical TO-220-3 Full Pack, Isolated Tab packaging with through-hole mounting configuration. PCB footprints and mounting hole patterns are identical across DSTF30120C, SDT30120CTFP, and SDT20120CTFP.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the DSTF30120C.

Q: What are the reverse leakage differences between the main part and substitutes?

A: The DSTF30120C exhibits 800 µA reverse leakage at 120 V. The SDT30120CTFP exhibits 100 µA, and the SDT20120CTFP exhibits 80 µA at the same voltage. Lower reverse leakage in the substitute parts results in reduced standby current and improved thermal performance.

Q: What are the forward voltage differences?

A: The DSTF30120C forward voltage is 970 mV at 15 A. The SDT30120CTFP forward voltage is 930 mV at 15 A, representing a 40 mV reduction. The SDT20120CTFP forward voltage is 880 mV at 10 A. Lower forward voltage reduces power dissipation and heat generation during operation.

Q: Can SDT20120CTFP be used in a design requiring 15 A current capacity?

A: No. The SDT20120CTFP is rated for 10 A average rectified current per diode. Use in applications requiring 15 A operation exceeds the component rating and is not supported. The SDT30120CTFP must be used for 15 A applications.