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Taiwan Semiconductor Corporation SF21GHB0G
- Part No.:
- SF21GHB0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF21GHB0G.pdf
- Description:
- DIODE GEN PURP 50V 2A DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
SF21GHB0G from Taiwan Semiconductor is a 2 A, 50 V super fast recovery rectifier diode in DO-204AC (DO-15) package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 2 A, and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or output rectifier in DC-DC converters and switching-mode power supplies.
For engineers reviewing the SF21GHB0G datasheet, SF21GHB0G pinout, SF21GHB0G application, or SF21GHB0G equivalent, key selection criteria include its 50 V VRRM, 50 A IFSM, 150 °C TJMAX, glass-passivated junction, and RoHS/halogen-free compliance in automotive and industrial power conversion designs.
Technical Context
This super fast rectifier uses a single-die silicon PN junction with glass passivation to achieve low forward voltage and rapid carrier recombination. Its 35 ns trr and 40 pF junction capacitance at 1 MHz / 4 V enable high-frequency switching operation up to several hundred kHz.
The device operates across –55 °C to +150 °C junction temperature range, with RθJA = 65 °C/W and RθJC = 16 °C/W thermal resistance, supporting conduction-limited thermal design in compact PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or buck output stage |
| IF | 2 A - Continuous average forward current; determines steady-state power dissipation and heatsink sizing |
| IFSM | 50 A - Non-repetitive surge rating (8.3 ms half-sine); supports inrush and transient overload tolerance |
| trr | 35 ns - Reverse recovery time; enables efficient operation in 100–500 kHz SMPS topologies |
| VF | 0.95 V @ 2 A, 25 °C - Low conduction loss; reduces power dissipation and improves system efficiency |
| CJ | 40 pF @ 1 MHz, 4 V - Junction capacitance; impacts high-frequency switching noise and EMI filter design |
| TJMAX | 150 °C - Maximum junction temperature; sets thermal derating envelope for ambient and layout constraints |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 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, transformer secondary in flyback) |
| Cathode | Forward current exit point | Connected to output rail or energy storage capacitor; polarity marked by band on body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control and ADAS power stages |
| Glass passivated junction | Enhances moisture resistance and long-term reliability in humid or thermally cycled environments |
| Low VF (0.95 V) | Reduces conduction loss by ~15% vs. standard fast rectifiers at 2 A, lowering thermal stress |
| High IFSM (50 A) | Withstands startup surges and short-circuit transients without bond wire failure |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports eco-design requirements for EU and global markets |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V–48 V input DC-DC converters for telecom and industrial power supplies. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 0.95 V VF minimizes conduction loss at 2 A load; 35 ns trr suppresses switching spikes and EMI generation. | Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in H-bridge inverters. IC Role / Device Role / Timing Role: Clamp diode providing low-impedance return path during MOSFET off-time to prevent voltage overshoot. Use Value: 50 A IFSM handles peak inductive kickback; 150 °C TJMAX ensures robustness under intermittent overload. |
| Automotive Body Control Module (BCM) | Industrial PLC Power Input Stage |
Use Scenario: Reverse polarity protection and load dump clamping in 12 V automotive BCM power inputs. IC Role / Device Role / Timing Role: Protection rectifier conducting during normal operation and absorbing transient energy during load dump events. Use Value: AEC-Q101 qualification guarantees reliability over 15-year vehicle lifetime; glass passivation prevents corrosion in under-hood humidity. | Use Scenario: Input rectification in 24 V/48 V industrial PLC power supplies exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion element handling continuous 2 A load and occasional 50 A surges. Use Value: –55 °C to +150 °C operating range accommodates uncontrolled cabinet environments; DO-15 package enables manual or automated through-hole assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R06 | Same 2 A / 600 V rating but higher VF (1.7 V), slower trr (50 ns), no AEC-Q101 | Not suitable for automotive; better for cost-sensitive industrial SMPS where 600 V blocking is required | Select only if VRRM > 50 V is mandatory and AEC-Q101 is not required |
| ON Semi MUR220 | 2 A / 200 V, trr = 35 ns, VF = 0.93 V, no AEC-Q101, same DO-15 package | Lacks automotive qualification; acceptable for commercial-grade DC-DC and inverters with <200 V reverse stress | Use when 50 V VRRM is sufficient and AEC-Q101 is not mandated |
Compared with STTH2R06 and MUR220, SF21GHB0G uniquely combines 50 V VRRM, AEC-Q101 qualification, and 0.95 V VF in DO-15 - making it optimal for space-constrained, automotive-compliant 12 V power rails where low conduction loss and reliability are critical.
Availability
SF21GHB0G is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and switching-mode inverter freewheeling circuits requiring stable component supply and long-term lifecycle support.
Supply support for SF21GHB0G 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 diodes, and MOSFETs for industrial and automotive markets.
SF21GHB0G belongs to TSC's SF2xG super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial applications demanding AEC-Q101 validation and low-loss performance.
FAQ
What is the maximum junction temperature rating for SF21GHB0G?
The SF21GHB0G has a maximum junction temperature (TJMAX) of +150 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or enclosed industrial enclosures. This rating is validated per AEC-Q101 stress testing and must be respected in thermal design using the published RθJA = 65 °C/W value. Derating curves in the SF21GHB0G datasheet define allowable current versus ambient temperature.
Is SF21GHB0G pin-compatible with standard DO-15 rectifiers like 1N4007?
Yes, SF21GHB0G uses the DO-204AC (DO-15) axial package with identical mechanical dimensions and lead spacing as 1N4007, allowing direct PCB footprint reuse. However, SF21GHB0G is a super fast rectifier (trr = 35 ns) versus 1N4007's general-purpose recovery (>2 µs), so electrical behavior differs significantly in high-frequency circuits - layout and thermal design must reflect its faster switching and lower VF.
Does SF21GHB0G meet automotive qualification standards?
Yes, SF21GHB0G is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code. This certification covers stress tests including HTGB, HTRB, TCT, and mechanical shock, validating its suitability for automotive power systems such as body control modules, lighting drivers, and ADAS subsystems. The qualification applies to the full SF2xGH series, including SF21GHB0G.
What is the forward voltage drop of SF21GHB0G at rated current?
The SF21GHB0G exhibits a typical forward voltage (VF) of 0.95 V at 2 A and 25 °C junction temperature, measured under pulsed conditions (PW = 0.3 ms). This low VF directly reduces conduction losses compared to standard fast rectifiers, improving overall efficiency in 12 V and 24 V power converters where SF21GHB0G is commonly deployed.
How does the junction capacitance of SF21GHB0G affect high-frequency performance?
SF21GHB0G has a typical junction capacitance (CJ) of 40 pF at 1 MHz and 4 V reverse bias. This value influences high-frequency switching noise and EMI filter design - lower CJ helps minimize capacitive coupling and ringing during turn-off. In practice, this enables clean operation in 200–500 kHz DC-DC converters without excessive snubbing, distinguishing SF21GHB0G from slower, higher-CJ alternatives.
SF21GHB0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 40pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF21GHB0G FAQ
1.How can I place an order for SF21GHB0G through Aetrix?
Please submit a Request for Quotation (RFQ) for SF21GHB0G 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 SF21GHB0G reliable?
The price and inventory of SF21GHB0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF21GHB0G is usually 5 days.
3.What payment methods are accepted for SF21GHB0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF21GHB0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF21GHB0G?
SF21GHB0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF21GHB0G 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 SF21GHB0G?
For technical support, including SF21GHB0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF21GHB0G requirements.
6.How does Aetrix verify that SF21GHB0G is sourced from the original manufacturer or authorized distributors?
All SF21GHB0G 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 SF21GHB0G meets industry standards.
7.What is the process for return or replacement of SF21GHB0G?
All SF21GHB0G units undergo pre-shipment inspection (PSI). If there is an issue with SF21GHB0G, 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 SF21GHB0G part is unused and in its original packaging.
Return procedure for SF21GHB0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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