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

Taiwan Semiconductor Corporation SF14G R1G

Name: SF14G R1G
Brand: Taiwan Semiconductor Corporation
SKU: SF14G R1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SF14G R1G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: SF14G R1G.pdf

Description:: DIODE GEN PURP 200V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:7,997

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Product details

Overview

SF14G R1G from Taiwan Semiconductor is a 1A, 200V super fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 35ns reverse recovery time, 0.95V forward voltage at 1A/25°C, and 30A surge capability - deployed in DC-DC converters and switching-mode inverters for high-efficiency power conversion.

For engineers reviewing the SF14G R1G datasheet, SF14G R1G pinout, SF14G R1G application, or SF14G R1G equivalent, key selection criteria include V_RRM = 200V, I_F = 1A, t_rr = 35ns, V_F = 0.95V, and DO-41 mechanical compatibility with standard through-hole PCB layouts.

Technical Context

The SF14G R1G implements a single-die silicon PN junction optimized for fast switching in medium-voltage power supplies. Its 35ns reverse recovery time enables operation in 100–500kHz SMPS topologies while maintaining low conduction loss via 0.95V V_F at rated current.

Thermal performance is defined by R_θJL = 20°C/W and R_θJA = 80°C/W, supporting continuous 1A operation up to +125°C ambient when mounted on minimum copper area per JEDEC standards. Polarity is marked by cathode band; leads are pure tin-plated per J-STD-002.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum repetitive reverse voltage before breakdown; sets upper limit for flyback snubber or output rectification in 24–48V systems
I_F	1 A - average forward current rating; defines continuous conduction capability without derating below 75°C ambient
t_rr	35 ns - measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables efficient operation in high-frequency DC-DC converters
V_F	0.95 V @ 1A, 25°C - forward voltage drop directly determines conduction loss (0.95W at full load)
C_J	20 pF @ 1MHz, 4V - junction capacitance impacts high-frequency switching noise and EMI filter design
I_FSM	30 A - non-repetitive surge current rating; supports inrush handling during cold-start of power supplies

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode indicated by band; no internal pins - two terminals only: anode and cathode.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node)
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output rail or filter capacitor positive; blocks 200V reverse bias

Key Features

Feature	Design Value
Super fast recovery	35ns t_rr minimizes switching loss and improves efficiency in 100–500kHz SMPS designs
Low forward voltage	0.95V V_F at 1A reduces conduction loss to ≤0.95W, easing thermal management
High surge robustness	30A I_FSM withstands transient overloads common in industrial power-up sequences
AEC-Q101 qualified option	R1G suffix indicates automotive-grade qualification - validated for temperature cycling, HTRB, and ESD per AEC standard

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 24V/48V buck-derived DC-DC modules powering telecom or industrial control logic. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 0.95V V_F and 35ns t_rr jointly reduce total power loss by ≥15% vs. standard FR107 in 250kHz designs.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Clamp inductive kickback during MOSFET turn-off, preventing voltage overshoot beyond 200V. Use Value: 200V V_RRM and 30A I_FSM ensure reliable clamping under 20A peak inductive currents.
AC-DC Adapter Secondary Rectification	Industrial PLC Power Supply Input Stage
Use Scenario: Output rectification in compact 12V/5V wall adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: High-frequency rectifier operating at 65–130kHz, replacing slower UF4007 equivalents. Use Value: 35ns t_rr eliminates tail current overlap loss, improving adapter efficiency by 0.8–1.2% at full load.	Use Scenario: Input rectification stage in 24V industrial PLC power supplies subjected to line surges and wide ambient (-40°C to +85°C). IC Role / Device Role / Timing Role: Primary rectifier feeding bulk capacitor; must sustain 1A continuous and 30A surge events. Use Value: -55°C to +150°C T_J range and JESD201 Class 2 whisker resistance enable long-term reliability in uncooled enclosures.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 24V/48V buck-derived DC-DC modules powering telecom or industrial control logic.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 0.95V V_F and 35ns t_rr jointly reduce total power loss by ≥15% vs. standard FR107 in 250kHz designs.

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

IC Role / Device Role / Timing Role: Clamp inductive kickback during MOSFET turn-off, preventing voltage overshoot beyond 200V.

Use Value: 200V V_RRM and 30A I_FSM ensure reliable clamping under 20A peak inductive currents.

AC-DC Adapter Secondary Rectification

Industrial PLC Power Supply Input Stage

Use Scenario: Output rectification in compact 12V/5V wall adapters using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: High-frequency rectifier operating at 65–130kHz, replacing slower UF4007 equivalents.

Use Value: 35ns t_rr eliminates tail current overlap loss, improving adapter efficiency by 0.8–1.2% at full load.

Use Scenario: Input rectification stage in 24V industrial PLC power supplies subjected to line surges and wide ambient (-40°C to +85°C).

IC Role / Device Role / Timing Role: Primary rectifier feeding bulk capacitor; must sustain 1A continuous and 30A surge events.

Use Value: -55°C to +150°C T_J range and JESD201 Class 2 whisker resistance enable long-term reliability in uncooled enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02	V_RRM = 200V, t_rr = 30ns, V_F = 0.92V - slightly faster but same package and rating	Optimized for higher-frequency PFC stages; less margin on I_FSM (25A vs. 30A)	Prefer STTH1R02 where t_rr < 30ns is critical; retain SF14G R1G for surge-heavy industrial environments
ON Semi MUR120	V_RRM = 200V, t_rr = 50ns, V_F = 0.97V - slower recovery, higher V_F, same DO-41 footprint	Designed for cost-sensitive consumer adapters; not AEC-Q101 qualified	Select MUR120 only for non-automotive, non-industrial cost-driven designs; SF14G R1G preferred for AEC-Q101 compliance and tighter t_rr

Compared with STTH1R02 and MUR120, SF14G R1G delivers optimal balance of 35ns t_rr, 30A surge headroom, and AEC-Q101 qualification - making it the default choice for automotive body electronics and industrial SMPS requiring both speed and ruggedness.

Availability

SF14G R1G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching mode inverter freewheeling, and industrial PLC power supply input stages requiring stable component supply and automotive-grade reliability.

Supply support for SF14G R1G 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 global industrial, automotive, and computing markets since 1979.

The SF11G–SF18G series was designed specifically for high-efficiency, high-reliability power conversion in space-constrained applications - emphasizing fast recovery, low V_F, and AEC-Q101 qualification for automotive subsystems.

FAQ

What is the maximum junction temperature rating for SF14G R1G?

The SF14G R1G has a maximum junction temperature (T_J) of +150°C, with operational storage range from –55°C to +150°C. This rating allows sustained 1A conduction in industrial environments up to +85°C ambient when mounted on ≥1 cm² copper pad, leveraging its R_θJA = 80°C/W thermal resistance. The SF14G R1G maintains parameter stability across this full range.

Is SF14G R1G pin-compatible with standard DO-41 rectifiers like 1N4007?

Yes, SF14G R1G uses the DO-204AL (DO-41) package with identical mechanical dimensions and lead spacing as 1N4007, enabling direct PCB footprint reuse. However, SF14G R1G is not a functional replacement: it offers 35ns t_rr and 200V V_RRM versus 1N4007's 30µs t_rr and 50V rating - so circuit validation is required for switching applications. The SF14G R1G requires no layout change but demands updated timing analysis.

Does SF14G R1G meet automotive qualification standards?

Yes, the "R1G" suffix explicitly denotes AEC-Q101 qualification per Version H2104 documentation. The SF14G R1G undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge per AEC-Q101 Rev D. This makes SF14G R1G suitable for automotive body control modules, lighting drivers, and infotainment power supplies - unlike generic SF14G variants.

What is the typical junction capacitance of SF14G R1G and how does it affect EMI?

The SF14G R1G exhibits 20pF typical junction capacitance (C_J) at 1MHz and 4V reverse bias. This value influences high-frequency switching noise: lower C_J reduces capacitive coupling into adjacent traces, easing EMI filter design in >200kHz converters. Compared to SF15G–SF18G (10pF), the SF14G R1G's 20pF is still well-suited for most 500kHz-class designs without added snubbers.

How does the forward voltage of SF14G R1G compare across temperature?

The SF14G R1G forward voltage decreases with rising junction temperature - approximately –1.8mV/°C slope - reaching ~0.82V at 125°C (vs. 0.95V at 25°C) under 1A DC. This negative TC improves thermal stability in parallel configurations and reduces conduction loss at elevated temperatures. The SF14G R1G datasheet confirms this behavior across its full –55°C to +150°C operating range.

SF14G R1G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 950 mV @ 1 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

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

SF14G R1G FAQ

1.How can I place an order for SF14G R1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SF14G R1G 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 SF14G R1G reliable?

The price and inventory of SF14G R1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF14G R1G is usually 5 days.

3.What payment methods are accepted for SF14G R1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF14G R1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SF14G R1G?

SF14G R1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SF14G R1G 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 SF14G R1G?

For technical support, including SF14G R1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF14G R1G requirements.

6.How does Aetrix verify that SF14G R1G is sourced from the original manufacturer or authorized distributors?

All SF14G R1G 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 SF14G R1G meets industry standards.

7.What is the process for return or replacement of SF14G R1G?

All SF14G R1G units undergo pre-shipment inspection (PSI). If there is an issue with SF14G R1G, 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 SF14G R1G part is unused and in its original packaging.

Return procedure for SF14G R1G:

1.Submit a request within 90 days.

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

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