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Diodes Incorporated SF30HG-T
- Part No.:
- SF30HG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF30HG-T.pdf
- Description:
- DIODE GEN PURP 500V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,517
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Product details
Overview
SF30HG-T from Diodes Incorporated is a 3.0A, 500V super-fast glass passivated rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 1.5V forward voltage at 3.0A, and 125A non-repetitive surge current rating; used in high-frequency switching power supplies and AC/DC front-end rectification.
For engineers reviewing the SF30HG-T datasheet, SF30HG-T pinout, SF30HG-T application, or SF30HG-T equivalent, key selection criteria include peak repetitive reverse voltage (500V), average rectified output current (3.0A @ TA = 55°C), reverse recovery time (35ns), forward voltage drop (1.5V @ IF = 3.0A), and thermal resistance (32°C/W).
Technical Context
This super-fast rectifier employs a diffused junction and glass passivated die construction to achieve low reverse leakage (5.0µA @ 25°C) and stable performance across -65°C to +150°C operating temperature range. Its 35ns trr enables efficient operation in SMPS topologies above 100kHz.
The device is optimized for single-phase, half-wave, 60Hz resistive or inductive loads with derating required for capacitive loads (–20% current). Thermal design must account for 32°C/W junction-to-ambient resistance under standard lead conditions (9.5mm from case).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 500 V - Maximum peak repetitive reverse voltage; defines safe blocking capability in AC line rectification. |
| IO @ TA=55°C | 3.0 A - Continuous average forward current under specified ambient condition; sets usable DC output capacity. |
| VFM @ IF=3.0A | 1.5 V - Forward voltage drop at rated current; directly impacts conduction loss and thermal load in power stage. |
| trr | 35 ns - Reverse recovery time; determines switching loss and EMI behavior in high-frequency converters. |
| IFSM | 125 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and fault transient handling. |
| IRM @ 25°C | 5.0 µA - Peak reverse leakage at rated DC blocking voltage; critical for standby power and high-impedance bias networks. |
| RθJA | 32 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained 3.0A operation. |
Pinout & Package
DO-201AD molded plastic package with axial leads, cathode band polarity marking, tin-plated solderable terminals, and UL 94V-0 flammability rating. Weight: 1.12 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC input or transformer secondary; must withstand full surge and RMS voltage stress. |
| Cathode | Forward current exit point | Connected to bulk capacitor or downstream converter; carries full rectified DC current and ripple. |
| Cathode Band | Polarity indicator | Visible marking on body; ensures correct orientation during PCB assembly and prevents reverse-bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances moisture resistance and long-term reliability in humid or thermally cycled environments. |
| Super-fast switching (35ns trr) | Reduces switching losses and improves efficiency in 100–500kHz SMPS designs versus standard fast rectifiers. |
| 125A surge rating | Withstands cold-start inrush and short-circuit transients without degradation in typical AC/DC adapters. |
| Low IRM (5.0µA @ 25°C) | Minimizes standby power loss in energy-efficient power supplies meeting Level VI or CoC v5 standards. |
| DO-201AD mechanical robustness | Supports automated insertion and reflow-compatible lead finish; validated per MIL-STD-202, Method 208. |
Applications
| AC/DC Adapter Front-End | Server PSU Input Rectification |
|---|---|
Use Scenario: 50–60Hz AC input rectification in universal-input 12–24V adapters with <100W output. IC Role / Device Role / Timing Role: Primary-side unidirectional current switch converting AC to pulsating DC before bulk capacitance. Use Value: 35ns trr reduces high-frequency ringing and EMI filter burden; 1.5V VFM limits conduction loss at 3A load. |
Use Scenario: High-reliability input stage in redundant 80 PLUS Titanium server PSUs with active PFC. IC Role / Device Role / Timing Role: Secondary rectifier in auxiliary bias winding or hold-up capacitor charging path. Use Value: 125A IFSM handles PFC controller startup surges; DO-201AD package allows high-density layout with proven thermal margin. |
| Industrial Motor Drive Snubber | LED Driver Bridge Leg |
Use Scenario: Freewheeling path in IGBT-based 3-phase inverter snubber circuits for HVAC compressors. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback during switching transitions. Use Value: 500V VRRM safely blocks DC bus transients; 35ns trr prevents voltage overshoot during rapid turn-off. |
Use Scenario: Single-phase bridge rectifier in constant-current LED drivers for street lighting (100–200W). IC Role / Device Role / Timing Role: Full-wave rectification of 100–277V AC mains prior to buck/buck-boost regulation. Use Value: Low 5.0µA IRM maintains low no-load consumption; glass passivation ensures longevity in outdoor thermal cycling. |
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 | 600V VRRM, 3.0A IO, 50ns trr, TO-220AC package | Higher voltage rating but slower recovery; requires heatsink for same current density | Preferred where higher blocking voltage is mandatory and board space allows TO-220 mounting |
| ES3J | 600V VRRM, 3.0A IO, 35ns trr, DO-204AL (SMA) package | Same speed and current, but lower power dissipation capability due to smaller thermal mass | Valid for low-power (<15W) or space-constrained designs where RθJA ≤ 50°C/W is acceptable |
Compared with STTH3L06S and ES3J, SF30HG-T offers optimal balance of 500V blocking, 35ns speed, and DO-201AD thermal performance (32°C/W), making it suitable for mid-power industrial and adapter applications where cost, size, and efficiency are jointly constrained.
Availability
SF30HG-T is available at Aetrix Electronics and suitable for AC/DC adapters, server power supplies, industrial motor drives, and LED lighting systems requiring stable component supply and RoHS-compliant sourcing.
Supply support for SF30HG-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-efficiency power management and signal integrity solutions.
SF30HG-T belongs to the SF30xG super-fast rectifier family, designed specifically for high-frequency switching power conversion where low trr and controlled VFM are essential for efficiency and thermal management.
FAQ
What is the maximum allowable junction temperature for SF30HG-T?
The absolute maximum junction temperature is +150°C, with continuous operation limited by thermal design. At 3.0A average forward current and TA = 55°C, junction temperature rise is approximately 102°C (32°C/W × 3.0A² × RθJA × derating factor), requiring adequate PCB copper area or airflow to stay within limit.
Is SF30HG-T suitable for use in automotive applications?
SF30HG-T is not AEC-Q101 qualified and lacks automotive-specific qualification testing. While its -65°C to +150°C operating range meets ambient requirements, Diodes Incorporated explicitly labels this series as "NOT RECOMMENDED FOR NEW DESIGN" - making it unsuitable for new automotive ECUs or infotainment systems.
How does SF30HG-T compare to standard fast recovery diodes like FR307?
SF30HG-T has 35ns trr versus FR307's ~500ns, reducing switching loss by >80% in 100kHz+ converters. Its VFM is 1.5V vs FR307's ~1.2V, trading slight conduction loss for vastly improved dynamic performance - ideal for high-efficiency SMPS, not linear supplies.
Can SF30HG-T be used in full-wave bridge configurations?
Yes - four SF30HG-T devices can form a discrete full-wave bridge. Each diode handles half-wave conduction, so average current remains 3.0A per device. Ensure symmetrical PCB layout and thermal coupling to avoid current imbalance; DO-201AD leads must be routed to minimize parasitic inductance.
SF30HG-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 500 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 500 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF30HG-T FAQ
1.How can I place an order for SF30HG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF30HG-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 SF30HG-T reliable?
The price and inventory of SF30HG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF30HG-T is usually 5 days.
3.What payment methods are accepted for SF30HG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF30HG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF30HG-T?
SF30HG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF30HG-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 SF30HG-T?
For technical support, including SF30HG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF30HG-T requirements.
6.How does Aetrix verify that SF30HG-T is sourced from the original manufacturer or authorized distributors?
All SF30HG-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 SF30HG-T meets industry standards.
7.What is the process for return or replacement of SF30HG-T?
All SF30HG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF30HG-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 SF30HG-T part is unused and in its original packaging.
Return procedure for SF30HG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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