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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

Diodes Incorporated SDT20A120CTFP

Name: SDT20A120CTFP
Brand: Diodes Incorporated
SKU: SDT20A120CTFP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SDT20A120CTFP

Manufacturer:: Diodes Incorporated

Category:: Diode Arrays

Package:: TO-220-3 Full Pack, Isolated Tab

Datasheet:: SDT20A120CTFP.pdf

Description:: DIODE ARR SCHOTTKY 120V ITO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,343

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Product details

Overview

SDT20A120CTFP from Diodes Incorporated is a 20A dual common-cathode Trench Schottky rectifier in ITO220AB package, rated for 120V reverse voltage, with max 0.79V forward voltage at 10A/25°C and 100µA leakage at 120V/25°C - optimized for high-efficiency DC-DC converters and automotive-grade power supplies.

For engineers reviewing the SDT20A120CTFP datasheet, SDT20A120CTFP pinout, SDT20A120CTFP application, or SDT20A120CTFP equivalent, key selection criteria include thermal resistance (4°C/W junction-to-case), soft fast switching behavior, high-temperature leakage stability (20µA at 125°C), RoHS/Green compliance, and ITO220AB mechanical compatibility with heatsink mounting.

Technical Context

This dual-leg Schottky rectifier integrates two independent 10A-rated anode terminals sharing a common cathode, enabling synchronous or interleaved rectification topologies. Its trench MOS structure delivers lower VF than planar Schottkys while maintaining low IR drift up to +150°C junction temperature.

The device operates within -55°C to +150°C ambient range and supports 150A non-repetitive surge current. Thermal design relies on its 4°C/W R_θJC (ITO220AB) with 50mm×50mm×23mm heatsink - critical for sustained 10A-per-leg conduction in compact industrial power modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	120 V - Maximum repetitive reverse blocking voltage per leg; defines safe operating margin in 48V–60V bus systems.
I_O (per leg)	10 A - Continuous average forward current rating per anode; total device rating is 20A with shared cathode configuration.
V_F max	0.79 V @ 10A, 25°C - Low conduction loss enables >95% efficiency in 12V→5V/3.3V buck converters at full load.
I_R max	100 µA @ 120V, 25°C - Ultra-low leakage preserves standby power budget in always-on automotive ECUs.
R_θJC	4 °C/W - Junction-to-case thermal resistance (ITO220AB); enables 25W dissipation with ≤100°C case rise above ambient.
T_J range	-55°C to +150°C - Full automotive-grade operating envelope; validated for under-hood power conversion applications.
Package	ITO220AB - Insulated TO-220 variant with creepage-enhanced body; allows direct PCB mounting without isolation hardware.

Pinout & Package

ITO220AB package features insulated plastic body with three leads: two anodes (A1, A2) and one common cathode (K). Mounting tab is electrically isolated from all terminals and serves solely as thermal path to heatsink.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	First rectifying input node; connects to primary-side switch node in synchronous buck or flyback secondary.
A2	Anode 2	Second independent rectifying input; supports dual-phase or redundant output configurations.
K	Common Cathode	Shared output node; routes combined DC output to filter capacitor and load; requires low-inductance layout.

Key Features

Feature	Design Value
Low forward voltage drop	V_F = 0.73V typ @ 10A/25°C - reduces conduction loss by ≥15% vs. standard Schottky alternatives in 12V-input converters.
Soft, fast switching	No reverse recovery charge (Q_rr ≈ 0) - eliminates switching spikes and EMI in high-frequency (>300kHz) topologies.
High-temperature leakage stability	I_R = 20µA @ 120V/125°C - maintains <1mW standby dissipation in hot environments without derating.
Lead-free & Green construction	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); RoHS 3 compliant - meets automotive Tier-1 material declarations.

Applications

Automotive DC-DC Converters

Industrial SMPS Rectification

Use Scenario: 12V/48V bidirectional DC-DC converter in 48V mild-hybrid vehicle architecture.

IC Role / Device Role / Timing Role: Dual-leg synchronous rectifier replacing MOSFETs in secondary side; handles 10A per phase at 200kHz switching.

Use Value: 0.79V V_F limits conduction loss to <8W per leg, enabling >94% peak efficiency without active cooling.

Use Scenario: Output rectification in 24V/15A industrial AC-DC power supply with forced-air cooling.

IC Role / Device Role / Timing Role: Common-cathode dual diode providing parallel current paths to reduce thermal stress on single-output rail.

Use Value: 4°C/W R_θJC allows stable operation at 85°C ambient with 50mm heatsink - no derating required.

Telecom Power Modules

Server VRM Secondary Side

Use Scenario: +54V input telecom rectifier module delivering 12V@20A to base station RF amplifiers.

IC Role / Device Role / Timing Role: High-current freewheel diode in multiphase buck converter; shares load across both anodes.

Use Value: Soft switching eliminates ringing-induced gate drive noise, improving signal integrity in sensitive RF sections.

Use Scenario: Point-of-load (POL) converter supplying GPU core voltage (0.8V/300A) in AI accelerator servers.

IC Role / Device Role / Timing Role: Secondary-side rectifier in interleaved 2-phase buck; cathode tied to low-impedance output plane.

Use Value: 100µA max leakage at 25°C ensures <0.5mW standby loss per leg - critical for energy-efficient data centers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual common-cathode Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-20CPH12	Same 120V/20A rating but TO-247AC package; R_θJC = 2.5°C/W; VF = 0.82V @ 10A/25°C.	Higher thermal performance but larger footprint; requires different heatsink interface and PCB cutout.	Select when junction temperature must stay <110°C under 20A continuous load without forced air.
ON Semiconductor MBR20120CT	120V/20A, TO-220AB (non-insulated); R_θJC = 2.0°C/W; VF = 0.85V @ 10A/25°C; no RoHS 3/Green certification.	Lower cost but requires insulating washer; higher VF increases conduction loss by ~8% at full load.	Acceptable for cost-sensitive industrial designs where isolation is managed externally and leakage <50µA @ 125°C suffices.

Compared with VS-20CPH12 and MBR20120CT, SDT20A120CTFP offers superior thermal isolation (ITO220AB), best-in-class VF (0.79V), and full automotive-compliant material specs - making it optimal for space-constrained, thermally demanding, and regulated applications.

Availability

SDT20A120CTFP is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS rectification, and telecom power modules requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned manufacturing traceability.

Supply support for SDT20A120CTFP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This device belongs to Diodes' Trench Schottky Rectifier product line - engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and communications infrastructure applications.

FAQ

Is SDT20A120CTFP pin-compatible with standard TO-220AB dual diodes?

No - SDT20A120CTFP uses the ITO220AB package, which has an insulated tab and slightly different lead spacing versus generic TO-220AB. Pin assignment (A1-A2-K) matches, but mechanical mounting requires verification of creepage distance and heatsink isolation. PCB footprints must accommodate ITO220AB's 4.70mm body width and 10.11mm E dimension.

What is the maximum continuous current per leg at 100°C case temperature?

Based on Figure 4 (DC Forward Current Derating), at T_C = 100°C, the derated I_O per leg is approximately 7.5A. This assumes use of the specified 50mm×50mm×23mm aluminum heatsink and accounts for thermal resistance degradation at elevated temperatures.

Does SDT20A120CTFP meet AEC-Q101 requirements?

Per Diodes' documentation, SDT20A120CTFP is manufactured in IATF 16949-certified facilities and supports PPAP; however, it is not explicitly qualified to AEC-Q101. For automotive applications requiring formal qualification, contact Diodes directly to confirm change-controlled AEC-Q101 variants such as SDT20A120CTFP-13.

How does the soft switching behavior impact EMI in high-frequency designs?

As a Schottky rectifier with negligible Q_rr, SDT20A120CTFP eliminates reverse recovery current spikes that cause high-frequency ringing and radiated emissions. This reduces need for snubbers and lowers conducted EMI in 300–1000kHz DC-DC converters - verified in Diodes' application note AN-4001 for 48V→12V buck designs.

SDT20A120CTFP Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-220-3 Full Pack, Isolated Tab

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 120 V

Current - Average Rectified (Io) (per Diode):: 10A

Voltage - Forward (Vf) (Max) @ If:: 790 mV @ 10 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 120 V

Operating Temperature - Junction:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AB

SDT20A120CTFP FAQ

1.How can I place an order for SDT20A120CTFP through Aetrix?

Please submit a Request for Quotation (RFQ) for SDT20A120CTFP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SDT20A120CTFP reliable?

The price and inventory of SDT20A120CTFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT20A120CTFP is usually 5 days.

3.What payment methods are accepted for SDT20A120CTFP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT20A120CTFP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SDT20A120CTFP?

SDT20A120CTFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SDT20A120CTFP order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SDT20A120CTFP?

For technical support, including SDT20A120CTFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT20A120CTFP requirements.

6.How does Aetrix verify that SDT20A120CTFP is sourced from the original manufacturer or authorized distributors?

All SDT20A120CTFP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SDT20A120CTFP meets industry standards.

7.What is the process for return or replacement of SDT20A120CTFP?

All SDT20A120CTFP units undergo pre-shipment inspection (PSI). If there is an issue with SDT20A120CTFP, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SDT20A120CTFP part is unused and in its original packaging.

Return procedure for SDT20A120CTFP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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