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

Taiwan Semiconductor Corporation SFF504G

Name: SFF504G
Brand: Taiwan Semiconductor Corporation
SKU: SFF504G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SFF504G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: SFF504G.pdf

Description:: DIODE GEN PURP 200V 5A ITO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:1,000

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Product details

Overview

SFF504G from Taiwan Semiconductor is a 200 V repetitive peak reverse voltage, 5 A average forward current super fast rectifier diode in ITO-220AB package, with 35 ns reverse recovery time, 0.98 V forward voltage at 2.5 A and 25°C, and 70 pF junction capacitance at 1 MHz / 4.0 V reverse bias-used in high-frequency DC/DC converters and freewheeling paths.

For engineers reviewing the SFF504G datasheet, SFF504G pinout, SFF504G application, or SFF504G equivalent, key selection criteria include verified V_RRM = 200 V, trr = 35 ns, VF = 0.98 V @ 2.5 A, CJ = 70 pF @ 1 MHz/4.0 V, and ITO-220AB thermal resistance R_θJC = 5.5 °C/W for switching power stage optimization.

Technical Context

The SFF504G integrates dual die configuration in a single ITO-220AB package, enabling independent or common-cathode use in bridge or dual-switch topologies. Its super fast recovery (trr ≤ 35 ns) and low VF support high-efficiency operation in 100–500 kHz switching converters.

Thermal performance is defined by R_θJC = 5.5 °C/W and T_J_MAX = 150 °C, with matte tin-plated leads compliant to J-STD-002 and JESD201 Class 2 whisker testing-ensuring reliability under repeated thermal cycling and high surge conditions (I_FSM = 70 A).

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - supports 200 V DC bus or 141 V RMS AC input in offline SMPS
I_F	5 A continuous - rated for sustained conduction in primary-side snubbers or secondary-side freewheeling
trr	35 ns - enables efficient operation up to ~500 kHz without excessive switching loss
V_F	0.98 V @ 2.5 A, 25°C - reduces conduction loss vs. standard fast recovery diodes (typically >1.1 V)
C_J	70 pF @ 1 MHz, 4.0 V - limits capacitive turn-on loss and EMI in high-dV/dt environments
R_θJC	5.5 °C/W - allows 11 W dissipation with 60.5°C case-to-junction rise at 25°C ambient
I_FSM	70 A @ 8.3 ms - withstands inrush and transient overloads in industrial power supplies

Pinout & Package

Package: ITO-220AB - isolated tab, single-row 3-terminal through-hole package with center cathode (K), anode (A), and isolated metal tab (case). Thermal pad electrically connected to cathode; mounting torque ≤ 0.56 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Current entry terminal during forward conduction	Connected to switch node or transformer secondary winding in flyback/freewheeling path
Cathode (K)	Current exit terminal during forward conduction	Common connection point for output rail or ground return; electrically tied to metal tab
Metal Tab	Thermal interface and electrical cathode extension	Must be mounted to heatsink with electrically insulating but thermally conductive interface; polarity-marked on body

Key Features

Feature	Design Value
Super fast recovery (trr ≤ 35 ns)	Enables high-frequency switching (>200 kHz) with minimal reverse recovery loss and reduced EMI generation
Low forward voltage (VF = 0.98 V)	Lowers conduction loss by ~15–20% vs. comparable 200 V fast recovery diodes, improving efficiency in 12–48 V output stages
High surge capability (IFSM = 70 A)	Survives cold-start inrush and short-circuit transients in industrial DC/DC modules without degradation
ITO-220AB thermal resistance (RθJC = 5.5 °C/W)	Supports 11 W continuous power dissipation with standard heatsinking-critical for unventilated embedded power designs
AEC-Q101 qualified option (SFF504GH)	Validated for automotive under-hood temperature cycling, vibration, and humidity stress-enabling use in ADAS power rails

Applications

DC/DC Converter Primary Snubber	Switch-Mode Power Supply Freewheeling
Use Scenario: Clamp voltage spikes across MOSFETs in flyback or forward converters operating at 200–300 kHz. IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing leakage inductance energy during switch turn-off. Use Value: 35 ns trr and 0.98 V VF minimize clamping loss and thermal stress versus standard FRDs.	Use Scenario: Provide low-loss current path during MOSFET off-time in synchronous or non-synchronous buck converters. IC Role / Device Role / Timing Role: Freewheeling diode conducting inductor current when main switch is open. Use Value: 70 pF junction capacitance limits ringing and EMI; 5.5 °C/W RθJC enables compact heatsink integration.
Industrial Inverter Output Stage	AC-DC Adapter Secondary Rectification
Use Scenario: Handle bidirectional current in half-bridge inverter legs driving PMSM motors at 10–20 kHz PWM. IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode providing reactive current return path. Use Value: Dual-die configuration supports independent leg placement; 150 °C T_JMAX ensures stability under motor stall conditions.	Use Scenario: Rectify 100–120 V AC line-derived 200 V DC bus in compact wall adapters. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC output. Use Value: UL Recognized File # E-326243 and RoHS/Halogen-free compliance meet global safety and environmental requirements.

DC/DC Converter Primary Snubber

Switch-Mode Power Supply Freewheeling

Use Scenario: Clamp voltage spikes across MOSFETs in flyback or forward converters operating at 200–300 kHz.

IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing leakage inductance energy during switch turn-off.

Use Value: 35 ns trr and 0.98 V VF minimize clamping loss and thermal stress versus standard FRDs.

Use Scenario: Provide low-loss current path during MOSFET off-time in synchronous or non-synchronous buck converters.

IC Role / Device Role / Timing Role: Freewheeling diode conducting inductor current when main switch is open.

Use Value: 70 pF junction capacitance limits ringing and EMI; 5.5 °C/W RθJC enables compact heatsink integration.

Industrial Inverter Output Stage

AC-DC Adapter Secondary Rectification

Use Scenario: Handle bidirectional current in half-bridge inverter legs driving PMSM motors at 10–20 kHz PWM.

IC Role / Device Role / Timing Role: Anti-parallel freewheeling diode providing reactive current return path.

Use Value: Dual-die configuration supports independent leg placement; 150 °C T_JMAX ensures stability under motor stall conditions.

Use Scenario: Rectify 100–120 V AC line-derived 200 V DC bus in compact wall adapters.

IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC output.

Use Value: UL Recognized File # E-326243 and RoHS/Halogen-free compliance meet global safety and environmental requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH5L06	V_RRM = 600 V, trr = 35 ns, V_F = 1.7 V @ 2.5 A, TO-220AC package	Higher voltage rating suits universal-input PFC stages; higher VF increases conduction loss in low-V_OUT designs	Select when 600 V blocking is required and thermal margin allows higher VF penalty
ON Semi MUR520	V_RRM = 200 V, trr = 35 ns, V_F = 1.15 V @ 2.5 A, TO-220AC package	Near-identical V_RRM and trr, but 17% higher VF increases power loss in high-duty-cycle freewheeling	Acceptable where existing TO-220AC footprint is fixed and 0.17 V VF increase is tolerable

Compared with STTH5L06 and MUR520, the SFF504G delivers lowest conduction loss (VF = 0.98 V) at 200 V rating while maintaining identical trr and thermal resistance-making it optimal for efficiency-critical 12–48 V output SMPS where voltage margin is constrained.

Availability

SFF504G is available at Aetrix Electronics and suitable for DC/DC converter snubbers, switching mode power supply freewheeling paths, and industrial inverter output stages requiring stable component supply, consistent parametric performance, and long-term manufacturability.

Supply support for SFF504G 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, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and automotive markets.

The SFF504G belongs to TSC's SFF501G–SFF508G super fast rectifier family, engineered specifically for high-frequency switching power conversion where low trr, low VF, and robust surge capability are critical-targeting 100 kHz–1 MHz SMPS, server VRMs, and EV onboard chargers.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the SFF504G?

The SFF504G has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2105). This rating defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown under normal operating conditions and is strictly validated per unit marking code "SFF504G".

What is the forward voltage (V_F) specification for the SFF504G at typical operating conditions?

The SFF504G exhibits a typical forward voltage (V_F) of 0.98 V at 2.5 A forward current and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and reflects low conduction loss essential for high-efficiency power conversion stages where the SFF504G is deployed.

Does the SFF504G have a specified junction capacitance (C_J) and at what test conditions?

Yes, the SFF504G has a typical junction capacitance (C_J) of 70 pF, measured at 1 MHz frequency and 4.0 V reverse bias voltage, as explicitly stated in the Electrical Specifications table. This parameter directly impacts high-frequency switching behavior, including turn-on loss and EMI generation in the SFF504G's target applications.

What is the reverse recovery time (t_rr) of the SFF504G and how is it tested?

The SFF504G has a maximum reverse recovery time (t_rr) of 35 ns, tested under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the datasheet's Electrical Specifications section. This t_rr value confirms its classification as a super fast rectifier and validates suitability for high-frequency switching applications up to ~500 kHz.

Is the SFF504G available in an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified variant of the SFF504G is designated SFF504GH, as indicated in the Ordering Information table. The "H" suffix denotes qualification to AEC-Q101 stress test standards for automotive discrete semiconductors, enabling use in under-hood power systems where the base SFF504G is not certified.

SFF504G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tube

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 980 mV @ 2.5 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 200 V

Capacitance @ Vr, F:: 70pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: ITO-220AB

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

SFF504G FAQ

1.How can I place an order for SFF504G through Aetrix?

Please submit a Request for Quotation (RFQ) for SFF504G 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 SFF504G reliable?

The price and inventory of SFF504G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SFF504G is usually 5 days.

3.What payment methods are accepted for SFF504G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SFF504G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SFF504G?

SFF504G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SFF504G 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 SFF504G?

For technical support, including SFF504G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SFF504G requirements.

6.How does Aetrix verify that SFF504G is sourced from the original manufacturer or authorized distributors?

All SFF504G 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 SFF504G meets industry standards.

7.What is the process for return or replacement of SFF504G?

All SFF504G units undergo pre-shipment inspection (PSI). If there is an issue with SFF504G, 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 SFF504G part is unused and in its original packaging.

Return procedure for SFF504G:

1.Submit a request within 90 days.

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

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