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

Taiwan Semiconductor Corporation SF33G A0G

Name: SF33G A0G
Brand: Taiwan Semiconductor Corporation
SKU: SF33G A0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF33G A0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SF33G A0G.pdf

Description:: DIODE GEN PURP 150V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:4,416

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Product details

Overview

SF33G A0G from Taiwan Semiconductor is a 150V, 3A super fast recovery rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3A/25°C, and 125A surge capability - deployed in DC-DC converters and switching inverters for high-efficiency power conversion.

For engineers reviewing the SF33G A0G datasheet, SF33G A0G pinout, SF33G A0G application, or SF33G A0G equivalent, key selection criteria include V_RRM = 150V, I_F = 3A, t_rr = 35ns, R_θJL = 10°C/W, and DO-201AD mechanical compatibility with automated through-hole assembly.

Technical Context

This single-die silicon rectifier operates with ultra-fast recovery (t_rr ≤ 35ns) to minimize switching losses in high-frequency SMPS topologies. Its low V_F (0.95V typ. @ 3A, 25°C) and high I_FSM (125A, 8.3ms half-sine) support robust freewheeling and output rectification under transient load conditions.

The device exhibits R_θJL = 10°C/W and R_θJC = 9°C/W, enabling thermal management in compact layouts. Junction temperature range is –55°C to +150°C, and it meets JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance per IEC 61249-2-21.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - maximum repetitive reverse voltage; defines safe blocking capability in 150V-rated DC bus or flyback secondary circuits
I_F	3 A - continuous forward current rating; supports steady-state output rectification up to 3A without derating at T_L ≤ 75°C
t_rr	35 ns - reverse recovery time; enables operation up to ~3 MHz switching frequency with minimal turn-off loss
V_F	0.95 V @ 3A, 25°C - low conduction loss; reduces power dissipation by ~0.3W vs. standard fast rectifiers at same current
I_FSM	125 A - non-repetitive surge current; withstands inrush and fault currents in 8.3ms half-sine waveform
R_θJL	10 °C/W - junction-to-lead thermal resistance; allows direct PCB copper pour heat sinking without heatsink
C_J	80 pF @ 1MHz, 4V - low junction capacitance; minimizes capacitive coupling noise in high-dv/dt gate-drive or snubber circuits

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, UL 94V-0 molded compound, 1.10g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return)
Cathode	Forward current exit / reverse blocking terminal	Marked with band; ties to output rail or filter capacitor positive; blocks reverse voltage up to 150V

Key Features

Feature	Design Value
Super fast recovery (t_rr ≤ 35ns)	Enables high-frequency SMPS operation with reduced EMI and switching loss vs. standard rectifiers
Low V_F (0.95V @ 3A)	Improves system efficiency by lowering conduction loss - critical in thermally constrained 3A DC-DC outputs
High I_FSM (125A)	Survives cold-start surges and short-circuit transients without bond-wire fusing
DO-201AD mechanical standardization	Ensures drop-in replacement compatibility across legacy designs using industry-standard axial rectifier footprint
RoHS & halogen-free	Meets IPC/JEDEC environmental requirements for automotive and industrial end-equipment compliance

Applications

DC-DC Converter Output Rectification	Switching Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 12V–48V output buck-derived or forward converters. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer into regulated DC output. Use Value: 35ns t_rr and 0.95V V_F reduce switching and conduction losses, improving full-load efficiency by ≥1.2% over UF33G equivalents.	Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during PWM off-time to clamp inductive kickback. Use Value: 125A I_FSM handles peak flyback energy without degradation; DO-201AD leadframe supports >200k-cycle mechanical reliability.
AC-DC Adapter Secondary Rectifier	Industrial Power Supply Snubber Clamp
Use Scenario: Output rectification in universal-input 5V–24V wall adapters with <15W output. IC Role / Device Role / Timing Role: Converts transformer secondary AC into filtered DC; operates at 65–130kHz switching frequency. Use Value: 150V V_RRM provides 2× safety margin over 75V peak secondary voltage; 80pF C_J limits capacitive noise coupling into feedback loop.	Use Scenario: Clamp diode in RCD snubber networks across MOSFETs in 400V bus industrial PSUs. IC Role / Device Role / Timing Role: Conducts transient energy during MOSFET turn-off, then blocks reverse voltage during reset phase. Use Value: Fast t_rr ensures clean clamping edge; 10°C/W R_θJL allows direct mounting to copper pour for reliable 100k-hour operation.

DC-DC Converter Output Rectification

Switching Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 12V–48V output buck-derived or forward converters.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer into regulated DC output.

Use Value: 35ns t_rr and 0.95V V_F reduce switching and conduction losses, improving full-load efficiency by ≥1.2% over UF33G equivalents.

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

IC Role / Device Role / Timing Role: Provides low-loss recirculation path during PWM off-time to clamp inductive kickback.

Use Value: 125A I_FSM handles peak flyback energy without degradation; DO-201AD leadframe supports >200k-cycle mechanical reliability.

AC-DC Adapter Secondary Rectifier

Industrial Power Supply Snubber Clamp

Use Scenario: Output rectification in universal-input 5V–24V wall adapters with <15W output.

IC Role / Device Role / Timing Role: Converts transformer secondary AC into filtered DC; operates at 65–130kHz switching frequency.

Use Value: 150V V_RRM provides 2× safety margin over 75V peak secondary voltage; 80pF C_J limits capacitive noise coupling into feedback loop.

Use Scenario: Clamp diode in RCD snubber networks across MOSFETs in 400V bus industrial PSUs.

IC Role / Device Role / Timing Role: Conducts transient energy during MOSFET turn-off, then blocks reverse voltage during reset phase.

Use Value: Fast t_rr ensures clean clamping edge; 10°C/W R_θJL allows direct mounting to copper pour for reliable 100k-hour operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 600V, t_rr = 35ns, V_F = 1.15V @ 3A - higher blocking, higher V_F	Used where 600V isolation or higher input voltage tolerance is required	Select when system requires >300V reverse margin; avoid if minimizing conduction loss is priority
UF33G	V_RRM = 150V, t_rr = 50ns, V_F = 0.92V @ 3A - slower recovery, slightly lower V_F	Preferred in cost-sensitive, <500kHz applications where EMI is less critical	Choose for lower-cost alternatives where 35ns speed is not mandatory; verify t_rr impact on layout EMI

Compared with STTH3L06S and UF33G, the SF33G A0G delivers optimal balance of 150V blocking, 35ns speed, and 0.95V V_F - making it ideal for space-constrained 3A DC-DC outputs requiring both efficiency and EMI control without over-specifying voltage rating.

Availability

SF33G A0G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling, and industrial power supply snubber clamp applications requiring stable component supply and consistent DO-201AD mechanical form factor.

Supply support for SF33G A0G 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 automotive, industrial, and consumer markets since 1979.

The SF3xG series is part of TSC's Super Fast Rectifier product line, engineered specifically for high-frequency switching power supplies where low recovery time and thermal robustness are critical to system-level efficiency and reliability.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SF33G A0G?

The SF33G A0G has a V_RRM of 150 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2105). This rating defines the highest continuous reverse voltage the device can block without breakdown under normal operating conditions and is strictly validated for the SF33G variant - not extrapolated from adjacent SF3xG family members.

Does SF33G A0G meet AEC-Q101 qualification?

No, SF33G A0G does not meet AEC-Q101 qualification. Per the Ordering Information section, only parts marked with suffix "H" (e.g., SF33GH) are AEC-Q101 qualified. The "A0G" suffix denotes 500-piece ammo box packaging in DO-201AD, with no automotive qualification implied or tested for SF33G A0G.

What is the forward voltage (V_F) of SF33G A0G at rated current?

The SF33G A0G exhibits a typical forward voltage of 0.95 V at I_F = 3 A and T_J = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline used for thermal and efficiency calculations in 3A power stages.

Is SF33G A0G available in tape-and-reel packaging?

No, SF33G A0G is packaged in 500-piece ammo boxes only. The ordering code "A0G" explicitly designates ammo box packaging; tape-and-reel variants use "SF33G" (1,250 pcs) or "SF33GH" (1,250 pcs) per the Ordering Information table - no "A0G" suffix appears with tape-and-reel in any official TSC documentation.

What is the junction-to-lead thermal resistance (R_θJL) of SF33G A0G?

The SF33G A0G has a typical junction-to-lead thermal resistance (R_θJL) of 10°C/W, as published in the Thermal Performance section of the datasheet. This parameter is measured under standardized conditions and applies directly to the DO-201AD package configuration used by SF33G A0G, enabling accurate board-level thermal modeling.

SF33G A0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Box (TB)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 150 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 3 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 150 V

Capacitance @ Vr, F:: 80pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SF33G A0G FAQ

1.How can I place an order for SF33G A0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF33G A0G 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 SF33G A0G reliable?

The price and inventory of SF33G A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF33G A0G is usually 5 days.

3.What payment methods are accepted for SF33G A0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF33G A0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF33G A0G?

SF33G A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF33G A0G 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 SF33G A0G?

For technical support, including SF33G A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF33G A0G requirements.

6.How does Aetrix verify that SF33G A0G is sourced from the original manufacturer or authorized distributors?

All SF33G A0G 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 SF33G A0G meets industry standards.

7.What is the process for return or replacement of SF33G A0G?

All SF33G A0G units undergo pre-shipment inspection (PSI). If there is an issue with SF33G A0G, 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 SF33G A0G part is unused and in its original packaging.

Return procedure for SF33G A0G:

1.Submit a request within 90 days.

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

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