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Diodes Incorporated SF20CG-T
- Part No.:
- SF20CG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SF20CG-T.pdf
- Description:
- DIODE GEN PURP 150V 2A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:7,640
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Product details
Overview
SF20CG-T from Diodes Incorporated is a 2.0A, 200V peak repetitive reverse voltage super-fast glass passivated rectifier diode in DO-15 package, with 35ns reverse recovery time, 0.95V forward voltage at 2.0A, and 10µA reverse leakage at 25°C, used in high-efficiency AC/DC input stages of offline power supplies and DC-DC converters.
For engineers reviewing the SF20CG-T datasheet, SF20CG-T pinout, SF20CG-T application, or SF20CG-T equivalent, key selection criteria include reverse recovery speed for EMI reduction, thermal resistance (40°C/W) for ambient-limited board layouts, surge rating (60A peak) for line transient robustness, and DO-15 mechanical compatibility with legacy through-hole designs.
Technical Context
This super-fast rectifier employs glass passivated die construction to ensure stable junction characteristics and low reverse leakage across temperature. Its 35ns trr and 75pF typical capacitance support switching frequencies up to several hundred kHz in flyback and boost topologies.
The device operates across –65°C to +150°C junction temperature range and is rated for 2.0A average forward current at 75°C ambient when leads are held at ambient at 9.5mm from case - a critical layout constraint for thermal derating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse voltage the diode blocks without breakdown; defines minimum input stage insulation margin for 120/230VAC systems. |
| IF(AV) | 2.0 A @ TA = 75°C - Continuous DC output current capability under defined thermal conditions; requires lead-length-controlled PCB layout. |
| VF | 0.95 V @ IF = 2.0A - Forward conduction loss directly impacts efficiency and thermal load in rectification path. |
| trr | 35 ns - Reverse recovery time determines switching loss and EMI generation during turn-off in SMPS applications. |
| IRM | 10 µA @ 25°C - Low reverse leakage preserves hold-up energy and reduces standby power in offline converters. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance; sets maximum power dissipation limit for natural-convection cooling. |
| IFSM | 60 A - Non-repetitive surge rating enables survival of cold-start inrush and lightning-induced line transients. |
Pinout & Package
DO-15 molded plastic package (UL 94V-0), axial leaded, cathode indicated by band. Weight: 0.35 g. Moisture sensitivity level: MSL 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input or transformer secondary; must handle full surge current and thermal stress. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to bulk capacitor or converter input; polarity marking (band) prevents assembly error. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures stable reverse leakage and long-term reliability under humidity and thermal cycling stress. |
| Super-fast 35ns trr | Reduces switching loss and high-frequency noise in 100–500 kHz SMPS designs compared to standard rectifiers. |
| 60A IFSM surge rating | Supports robust operation during cold-start and line-voltage transients without degradation. |
| Lead-free, RoHS-compliant finish | Enables compliance with environmental regulations and compatibility with Pb-free reflow and wave soldering. |
Applications
| Offline AC/DC Adapters | Industrial DC-DC Converter Input Stage |
|---|---|
Use Scenario: 120/230VAC-to-12VDC adapter for consumer electronics with universal input. IC Role / Device Role / Timing Role: Primary-side bridge rectifier converting AC line to pulsating DC before bulk capacitor and PWM controller. Use Value: 35ns trr minimizes switching noise coupling into feedback circuitry; 0.95V VF maintains >85% efficiency at full load. | Use Scenario: 48VDC input to isolated 5V/3.3V supply in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Input polarity protection and transient clamping rectifier ahead of active front-end. Use Value: 60A IFSM withstands motor drive regeneration spikes; DO-15 footprint allows drop-in replacement in existing industrial PCBs. |
| LED Driver Bulk Rectification | UPS Battery Charging Circuit |
Use Scenario: Constant-current LED driver for street lighting operating from 277VAC line. IC Role / Device Role / Timing Role: High-voltage rectifier feeding PFC stage; exposed to high dv/dt and thermal cycling. Use Value: 200V VRRM provides 2× safety margin over 277VAC peak; glass passivation ensures leakage stability at elevated ambient temperatures. | Use Scenario: Online UPS charging module converting utility AC to regulated DC for sealed lead-acid battery bank. IC Role / Device Role / Timing Role: Main rectifier in dual-phase charger front-end handling continuous 2A load and occasional overload surges. Use Value: 2.0A IF(AV) rating at 75°C supports sustained charge current without forced air; 40°C/W RθJA enables compact heatsinkless design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R02U | TO-220AC package, 200V VRRM, 35ns trr, but 2.0A IF(AV) rated at 110°C case temp - higher thermal headroom. | Requires mounting to heatsink; unsuitable for space-constrained DO-15 layouts. | Select when thermal management via heatsink is available and higher surge margin is needed. |
| ES2D-E3/57T | SMA package, 200V VRRM, 35ns trr, 2.0A IF(AV) at 100°C ambient - smaller footprint but lower surge rating (50A). | Surface-mount compatible; limited surge robustness in high-transient environments. | Select for automated SMT assembly where board space is constrained and line transients are controlled. |
Compared with STTH2R02U and ES2D-E3/57T, SF20CG-T offers optimal balance of through-hole mechanical ruggedness, 60A surge tolerance, and DO-15 legacy compatibility - making it preferred for cost-sensitive, thermally moderate, and high-reliability industrial power supplies.
Availability
SF20CG-T is available at Aetrix Electronics and suitable for offline AC/DC adapters, industrial DC-DC converter input stages, LED driver bulk rectification, and UPS battery charging circuits requiring stable component supply and long-lifecycle support.
Supply support for SF20CG-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
SF20CG-T belongs to the SF20xG super-fast rectifier product line, designed specifically for high-efficiency, low-noise AC/DC front-end rectification in cost-sensitive and thermally constrained power supplies.
FAQ
Is SF20CG-T still in active production?
No - SF20CG-T is officially obsolete per Diodes Incorporated's DS24013 Rev. 4 (February 2015). It is discontinued with no direct replacement announced. Aetrix Electronics maintains limited legacy stock for design continuity and repair programs, subject to availability.
What is the maximum allowable ambient temperature for full 2.0A operation?
SF20CG-T delivers its rated 2.0A average forward current only at TA = 75°C, provided leads are maintained at ambient temperature at a distance of 9.5mm from the case. Above 75°C, current must be linearly derated per Figure 1 in DS24013.
Can SF20CG-T replace SF20BG-T in an existing design?
Yes - SF20CG-T (200V VRRM) can safely replace SF20BG-T (100V VRRM) if the circuit's peak reverse voltage does not exceed 200V. No layout or thermal changes are required, as both share identical DO-15 package, pinout, and thermal characteristics.
Does SF20CG-T meet JEDEC moisture sensitivity requirements?
Yes - SF20CG-T is rated MSL Level 1 per J-STD-020C, meaning it has unlimited floor life and does not require dry-pack or baking prior to soldering, simplifying manufacturing logistics.
SF20CG-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 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:
- 10 µA @ 150 V
- Capacitance @ Vr, F:
- 75pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF20CG-T FAQ
1.How can I place an order for SF20CG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF20CG-T 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 SF20CG-T reliable?
The price and inventory of SF20CG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF20CG-T is usually 5 days.
3.What payment methods are accepted for SF20CG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF20CG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF20CG-T?
SF20CG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF20CG-T 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 SF20CG-T?
For technical support, including SF20CG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF20CG-T requirements.
6.How does Aetrix verify that SF20CG-T is sourced from the original manufacturer or authorized distributors?
All SF20CG-T 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 SF20CG-T meets industry standards.
7.What is the process for return or replacement of SF20CG-T?
All SF20CG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF20CG-T, 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 SF20CG-T part is unused and in its original packaging.
Return procedure for SF20CG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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