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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SF36G

Name: SF36G
Brand: Taiwan Semiconductor Corporation
SKU: SF36G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF36G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF36G.pdf

Description:: DIODE GEN PURP 400V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:1,479

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Product details

Overview

SF36G from Taiwan Semiconductor is a 400V, 3A super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 1.30V forward voltage at 3A/25°C, and 125A surge capability - deployed in switching-mode DC-DC converters and freewheeling paths in automotive power supplies.

For engineers reviewing the SF36G datasheet, SF36G pinout, SF36G application, or SF36G equivalent, key selection criteria include V_RRM = 400V, I_F = 3A, t_rr = 35ns, thermal resistance R_θJL = 10°C/W, and AEC-Q101 qualification status (SF36GH variant only).

Technical Context

The SF36G is a single-die, planar junction super fast rectifier optimized for high-frequency switching applications. Its 35ns reverse recovery time and low 1.30V forward voltage at rated current enable reduced switching losses in 100–500kHz SMPS topologies.

Thermally, it delivers R_θJL = 10°C/W and R_θJC = 9°C/W in DO-201AD, supporting continuous 3A operation up to 150°C junction temperature with appropriate PCB copper area. Junction capacitance is 60pF at 4V reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - maximum repetitive reverse blocking voltage; defines usable input voltage range in buck/boost stages
I_F	3 A - average forward current rating; determines continuous conduction capability in output rectification
t_rr	35 ns - reverse recovery time; enables efficient operation in high-frequency (>200 kHz) switching converters
V_F	1.30 V @ 3A, 25°C - forward voltage drop; directly impacts conduction loss and thermal design margin
I_FSM	125 A - non-repetitive surge current (8.3ms half-sine); supports inrush and fault-current handling
C_J	60 pF @ 1MHz, 4V - junction capacitance; affects high-frequency noise and snubber design requirements
R_θJL	10 °C/W - junction-to-lead thermal resistance; enables direct thermal coupling to PCB copper or heatsink via lead frame

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or filter capacitor positive; blocks 400V reverse during off-state

Key Features

Feature	Design Value
Super fast recovery (t_rr = 35 ns)	Reduces switching loss and EMI in high-frequency SMPS, enabling smaller magnetics and filters
Low forward voltage (V_F = 1.30 V @ 3A)	Lowers conduction loss by ~15% vs. standard fast rectifiers, improving efficiency in 12–48V output stages
High surge rating (I_FSM = 125 A)	Withstands repeated cold-start surges and transient overloads without degradation
AEC-Q101 qualified option (SF36GH)	Validated for automotive under-hood environments including temperature cycling, vibration, and humidity testing
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and global environmental compliance mandates for industrial and automotive production

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 24V–48V output DC-DC converters operating at 200–300kHz. IC Role / Device Role / Timing Role: Unidirectional current path with minimal reverse recovery tail; conducts during synchronous rectifier off-time. Use Value: 35ns t_rr prevents cross-conduction loss; 1.30V V_F reduces average conduction loss to <0.4W at 3A.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss return path when main switches turn off; clamps inductive kickback within 400V limit. Use Value: 125A I_FSM safely absorbs energy from 50mH/2A inductors; DO-201AD mechanical robustness withstands vibration.
Automotive On-Board Charger (OBC) Auxiliary Supply	Industrial AC-DC Front-End Bridge Leg
Use Scenario: Auxiliary 12V supply derived from high-voltage battery (400V) using flyback topology in EV on-board chargers. IC Role / Device Role / Timing Role: High-reliability output rectifier exposed to wide ambient temperature swings (−40°C to +125°C). Use Value: AEC-Q101-qualified SF36GH variant ensures lifetime reliability; 150°C T_JMAX supports compact thermal design.	Use Scenario: Single-diode leg in discrete bridge rectifier for 240VAC industrial power supplies feeding PFC stages. IC Role / Device Role / Timing Role: Handles 3A average current with peak line surges; operates in semi-controlled rectification mode. Use Value: 400V V_RRM provides 2× safety margin over 240VAC peak (339V); 10°C/W R_θJL allows direct lead-mount thermal relief.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 24V–48V output DC-DC converters operating at 200–300kHz.

IC Role / Device Role / Timing Role: Unidirectional current path with minimal reverse recovery tail; conducts during synchronous rectifier off-time.

Use Value: 35ns t_rr prevents cross-conduction loss; 1.30V V_F reduces average conduction loss to <0.4W at 3A.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in H-bridge inverters.

IC Role / Device Role / Timing Role: Provides low-loss return path when main switches turn off; clamps inductive kickback within 400V limit.

Use Value: 125A I_FSM safely absorbs energy from 50mH/2A inductors; DO-201AD mechanical robustness withstands vibration.

Automotive On-Board Charger (OBC) Auxiliary Supply

Industrial AC-DC Front-End Bridge Leg

Use Scenario: Auxiliary 12V supply derived from high-voltage battery (400V) using flyback topology in EV on-board chargers.

IC Role / Device Role / Timing Role: High-reliability output rectifier exposed to wide ambient temperature swings (−40°C to +125°C).

Use Value: AEC-Q101-qualified SF36GH variant ensures lifetime reliability; 150°C T_JMAX supports compact thermal design.

Use Scenario: Single-diode leg in discrete bridge rectifier for 240VAC industrial power supplies feeding PFC stages.

IC Role / Device Role / Timing Role: Handles 3A average current with peak line surges; operates in semi-controlled rectification mode.

Use Value: 400V V_RRM provides 2× safety margin over 240VAC peak (339V); 10°C/W R_θJL allows direct lead-mount thermal relief.

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L04S	V_RRM = 400V, t_rr = 30ns, V_F = 1.25V @ 3A - slightly faster but lower surge (100A)	Preferred in ultra-low-noise telecom PSUs; less tolerant of repetitive surge events	Select when t_rr < 30ns is critical and surge stress is low
ON Semi MUR340	V_RRM = 400V, t_rr = 50ns, V_F = 1.35V @ 3A - slower recovery, higher V_F, same I_FSM = 125A	Better suited for <100kHz designs where thermal margin > switching loss	Select when cost sensitivity outweighs high-frequency efficiency needs

Compared with STTH3L04S and MUR340, the SF36G delivers balanced performance: 35ns t_rr and 1.30V V_F support 200–300kHz operation while retaining full 125A surge capability - making it optimal for automotive and industrial SMPS where both speed and ruggedness are required.

Availability

SF36G is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling circuits requiring stable component supply, automotive-grade traceability, and long-term industrial lifecycle support.

Supply support for SF36G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, automotive, and consumer markets since 1979.

The SF31G–SF38G super fast rectifier family is designed specifically for high-efficiency, high-reliability power conversion in automotive ADAS modules, industrial PLCs, and server auxiliary supplies - emphasizing speed, thermal robustness, and AEC-Q101 compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF36G?

The SF36G has a V_RRM rating of 400V, confirmed in the Absolute Maximum Ratings table. This value defines the highest continuous reverse voltage the device can block without breakdown. It is critical for selecting appropriate derating margins in 240VAC or 400VDC systems. The SF36G must not be operated beyond this limit under any condition, including transients unless protected by external clamping.

Does SF36G have AEC-Q101 qualification?

The base SF36G is not AEC-Q101 qualified; however, the SF36GH variant - identical in electrical and thermal specs - is fully AEC-Q101 qualified per Version H2105 documentation. For automotive applications requiring qualification, specify SF36GH. Both share DO-201AD packaging, 400V V_RRM, and 35ns t_rr, but only SF36GH carries the qualification mark and test report documentation.

What is the forward voltage (V_F) of SF36G at 3A and 25°C?

The SF36G exhibits a typical forward voltage of 1.30V at 3A and 25°C, as specified in the Electrical Specifications table under "Forward voltage(1)". This value increases with junction temperature and current - e.g., ~1.45V at 125°C - and directly determines conduction loss (P_cond ≈ I_F × V_F). Designers should use the max V_F curve in Fig.4 for worst-case thermal analysis.

What package type does SF36G use, and what are its mechanical features?

SF36G uses the DO-201AD axial-leaded package with cathode band polarity marking. Its mechanical features include UL 94V-0 mold compound, pure tin-plated leads compliant with J-STD-002, JESD201 Class 2 whisker resistance, and approximate weight of 1.10g. The package supports manual and automated insertion, with thermal performance characterized by R_θJL = 10°C/W and R_θJC = 9°C/W.

How does SF36G compare to SF35G and SF37G in terms of voltage rating and forward voltage?

SF36G is rated for 400V V_RRM and has V_F = 1.30V @ 3A/25°C. SF35G is 300V/1.30V, and SF37G is 500V/1.70V. All share identical t_rr = 35ns, I_F = 3A, and I_FSM = 125A. The forward voltage increases with blocking voltage due to higher doping gradients - so SF36G offers the best balance of voltage headroom and conduction loss among mid-range variants.

SF36G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 3 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF36G FAQ

1.How can I place an order for SF36G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF36G 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 SF36G reliable?

The price and inventory of SF36G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF36G is usually 5 days.

3.What payment methods are accepted for SF36G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF36G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF36G?

SF36G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF36G 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 SF36G?

For technical support, including SF36G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF36G requirements.

6.How does Aetrix verify that SF36G is sourced from the original manufacturer or authorized distributors?

All SF36G 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 SF36G meets industry standards.

7.What is the process for return or replacement of SF36G?

All SF36G units undergo pre-shipment inspection (PSI). If there is an issue with SF36G, 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 SF36G part is unused and in its original packaging.

Return procedure for SF36G:

1.Submit a request within 90 days.

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

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