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Diodes Incorporated SF30CG-T
- Part No.:
- SF30CG-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF30CG-T.pdf
- Description:
- DIODE GEN PURP 150V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:5,325
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Product details
Overview
SF30CG-T from Diodes Incorporated is a 3.0A, 150V peak repetitive reverse voltage super-fast glass passivated rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3.0A, and 125A non-repetitive surge current rating, used in high-efficiency AC/DC front-end rectification for switch-mode power supplies.
For engineers reviewing the SF30CG-T datasheet, SF30CG-T pinout, SF30CG-T application, or SF30CG-T equivalent, key selection criteria include reverse voltage margin, thermal resistance (32°C/W), low leakage (<5.0µA @25°C), fast trr for reduced switching loss, and DO-201AD mechanical compatibility with legacy through-hole layouts.
Technical Context
This super-fast rectifier employs a diffused junction and glass passivated die construction to achieve tight control of reverse recovery characteristics and stable leakage performance across temperature. Its 35ns trr and low 75pF capacitance enable operation in high-frequency SMPS designs up to several hundred kHz without excessive switching loss.
The device is rated for 3.0A average forward current at 55°C ambient with derating above that temperature, and supports 125A single half-sine surge-critical for handling line transients in industrial AC inputs. Polarity is marked by cathode band; terminals are tin-plated for MIL-STD-202 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Maximum peak repetitive reverse voltage; defines safe blocking capability in 115VAC input circuits with safety margin. |
| IO @ TA=55°C | 3.0 A - Continuous DC output current capability when leads held at ambient at 9.5mm from case; sets minimum heatsinking requirement. |
| VFM @ IF=3.0A | 0.95 V - Forward voltage drop at rated current; directly determines conduction loss (2.85W) and thermal load in rectifier stage. |
| trr | 35 ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables efficient operation in 200–500kHz SMPS topologies. |
| IFSM | 125 A - Non-repetitive surge rating for 8.3ms half-sine; withstands cold-start inrush and lightning-induced line surges. |
| RθJA | 32 °C/W - Junction-to-ambient thermal resistance; used to calculate junction temperature rise (ΔT = Pd × RθJA) under real operating power dissipation. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), 1.12g weight, cathode indicated by band-marked end, lead finish: matte tin, RoHS compliant.
| 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 during conduction. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output capacitor or bulk storage; polarity marking ensures correct orientation in PCB layout and prevents catastrophic failure. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable long-term reverse leakage (<5µA @25°C) and immunity to humidity-induced surface conduction in humid environments. |
| Super-fast switching (35ns trr) | Reduces reverse recovery loss in high-frequency converters, improving efficiency over standard fast rectifiers (e.g., 100–200ns devices). |
| 125A IFSM surge rating | Supports robust operation in unregulated AC mains inputs subject to repeated cold-start surges and transient overloads. |
| DO-201AD mechanical standardization | Ensures direct replacement in existing through-hole power supply designs without footprint or tooling changes. |
Applications
| AC/DC Adapter Front-End | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Rectifying 50/60Hz or high-frequency AC from transformer secondaries in wall adapters rated 12–24V/2–3A. IC Role / Device Role / Timing Role: Primary unidirectional current path converting AC to pulsating DC; operates at line frequency but benefits from fast trr during zero-crossing transitions. Use Value: Low VFM (0.95V) minimizes conduction loss at 3A, while 150V VRRM provides 2× margin over 115VAC peak (162V), ensuring reliability under brownout and surge conditions. | Use Scenario: Input rectification in 300–500W industrial switch-mode power supplies with active PFC front-ends. IC Role / Device Role / Timing Role: Secondary rectifier in boost-derived PFC outputs or auxiliary bias winding rectification; subjected to high dv/dt and repetitive surges. Use Value: 35ns trr suppresses reverse recovery ringing, reducing EMI generation and MOSFET stress; 125A IFSM handles PFC overcurrent events without degradation. |
| UPS Battery Charger Input | LED Driver Bulk Rectification |
Use Scenario: Converting utility AC to DC for charging 24V/48V battery banks in offline UPS systems with automatic transfer switching. IC Role / Device Role / Timing Role: Main AC input rectifier exposed to generator-sourced waveforms, harmonics, and line disturbances; requires stable leakage and surge resilience. Use Value: <5.0µA IR at 25°C and <100µA at 100°C ensure minimal standby power drain; DO-201AD package allows secure mechanical mounting on high-vibration chassis. | Use Scenario: High-current rectification in constant-current LED drivers powering streetlights or commercial luminaires (30–100W). IC Role / Device Role / Timing Role: Bridge or single-diode rectifier feeding bulk capacitor before buck/boost regulation; operates continuously at elevated ambient temperatures. Use Value: 32°C/W RθJA enables predictable thermal design up to 70°C ambient; 150V rating accommodates 120VAC + 20% tolerance and transient spikes per ANSI C82.77. |
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 suits 230VAC global inputs; larger package requires heatsink for same power dissipation | Select when >300V blocking or forced-air cooling is required; not drop-in due to footprint and thermal interface change |
| ES3D-E3/57T | 200V VRRM, 3.0A IO, 35ns trr, DO-201AD package, 1.1V VFM | Same footprint and trr, but higher forward drop increases conduction loss by ~150mW at 3A | Acceptable for cost-sensitive designs where 0.15V VFM penalty is tolerable; verify thermal margin with RθJA=35°C/W |
Compared with STTH3L06S and ES3D-E3/57T, SF30CG-T offers optimal balance of 150V rating, ultra-low VFM, and DO-201AD compatibility for 115VAC-focused 3A rectification-enabling compact, thermally efficient, and cost-effective designs without retooling.
Availability
SF30CG-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial switch-mode power supplies, UPS battery chargers, and LED driver bulk rectification requiring stable component supply and tape-and-reel delivery for automated assembly.
Supply support for SF30CG-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
SF30CG-T belongs to the SF30xG super-fast rectifier product line, engineered specifically for high-efficiency, high-reliability AC/DC conversion in space-constrained power supplies where low forward drop and fast recovery are critical.
FAQ
Is SF30CG-T suitable for 230VAC input applications?
No. With a 150V peak repetitive reverse voltage (VRRM), SF30CG-T is rated for maximum 115VAC nominal systems (162V peak). For 230VAC (325V peak), a ≥400V device such as SF30JG (600V) or STTH3L06S is required to maintain adequate safety margin and reliability.
What is the maximum allowable junction temperature for SF30CG-T?
The absolute maximum junction temperature is +150°C, as specified in the datasheet. At 3.0A average forward current and 55°C ambient, junction temperature rises approximately 102°C (Pd ≈ 2.85W × RθJA 32°C/W), reaching ~157°C-exceeding limit. Derating or heatsinking is mandatory above 55°C ambient to stay within safe operating area.
Does SF30CG-T have a built-in thermal shutdown feature?
No. SF30CG-T is a passive silicon rectifier diode with no integrated thermal protection circuitry. Thermal management relies entirely on external design: PCB copper area, heatsinking, airflow, and current derating per Figure 1 in the datasheet. System-level thermal monitoring must be implemented separately.
Can SF30CG-T replace SF30BG-T in an existing design?
Yes, with verification. Both share identical DO-201AD package, 3.0A current rating, and 35ns trr, but SF30CG-T has 150V VRRM versus SF30BG-T's 100V. Replacement is safe if the circuit's peak reverse voltage never exceeds 150V; however, increased VRRM does not degrade performance and improves margin against transients.
SF30CG-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):
- 150 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 150 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SF30CG-T FAQ
1.How can I place an order for SF30CG-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SF30CG-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 SF30CG-T reliable?
The price and inventory of SF30CG-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF30CG-T is usually 5 days.
3.What payment methods are accepted for SF30CG-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF30CG-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF30CG-T?
SF30CG-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF30CG-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 SF30CG-T?
For technical support, including SF30CG-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF30CG-T requirements.
6.How does Aetrix verify that SF30CG-T is sourced from the original manufacturer or authorized distributors?
All SF30CG-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 SF30CG-T meets industry standards.
7.What is the process for return or replacement of SF30CG-T?
All SF30CG-T units undergo pre-shipment inspection (PSI). If there is an issue with SF30CG-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 SF30CG-T part is unused and in its original packaging.
Return procedure for SF30CG-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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