My Inquiry
My Account
Taiwan Semiconductor Corporation SF33G-A
- Part No.:
- SF33G-A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SF33G-A.pdf
- Description:
- 35NS, 3A, 150V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:7,779
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SF33G-A from Taiwan Semiconductor is a 150 V, 3 A super fast recovery rectifier diode in DO-201AD package, featuring 35 ns reverse recovery time, 0.95 V forward voltage at 3 A/25°C, and 125 A surge capability - deployed in DC-DC converters and switching-mode inverters for high-efficiency power conversion.
For engineers reviewing the SF33G-A datasheet, SF33G-A pinout, SF33G-A application, or SF33G-A equivalent, key selection criteria include VRRM = 150 V, IF = 3 A, trr = 35 ns, VF = 0.95 V, and thermal resistance RθJL = 10 °C/W - all critical for high-frequency, low-loss rectification in compact power supplies.
Technical Context
This single-die silicon rectifier uses epitaxial planar construction to achieve fast recovery (trr ≤ 35 ns) with low forward conduction loss. Its 150 V peak reverse voltage rating and 125 A non-repetitive surge current support robust operation under transient overloads in SMPS freewheeling paths.
The DO-201AD package provides 10 °C/W junction-to-lead thermal resistance and meets UL 94V-0 flammability requirements. Cathode polarity is marked by a visible band; leads are pure tin-plated per J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - maximum repetitive reverse voltage before breakdown; defines safe operating range in 12–48 V output DC-DC stages |
| IF | 3 A continuous - average forward current rating at TL = 75 °C; supports sustained load in 30–60 W converters |
| trr | 35 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables >100 kHz switching without excessive switching loss |
| VF | 0.95 V @ 3 A, 25 °C - low conduction drop reduces power dissipation vs. standard rectifiers; improves efficiency by ~0.5–1.2% at full load |
| IFSM | 125 A @ 8.3 ms half-sine - withstands inrush and fault currents in offline AC-DC front-ends and motor drive snubbers |
| RθJL | 10 °C/W - enables direct heatsinking via PCB copper pour or clip; limits junction rise to ≤30 °C above lead at 3 A |
| CJ | 80 pF @ 4 V, 1 MHz - low capacitance minimizes capacitive coupling noise and EMI in high-dv/dt environments |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by a painted band; body length 7.62 mm ±0.25 mm, diameter 2.72 mm ±0.13 mm, lead diameter 0.61 mm ±0.05 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to switch node or transformer secondary; must handle full 3 A RMS and 125 A surge |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; reverse leakage ≤5 µA at 150 V ensures minimal standby loss |
Key Features
| Feature | Design Value |
|---|---|
| Super fast recovery (trr ≤ 35 ns) | Reduces switching losses in 100–500 kHz SMPS designs, enabling higher efficiency than standard FRDs |
| Low VF = 0.95 V @ 3 A | Lowers conduction loss by ~15–20% vs. comparable 150 V rectifiers, improving thermal margin in sealed enclosures |
| DO-201AD with UL 94V-0 molding | Supports safety-certified industrial and telecom power supplies requiring flame-retardant packaging |
| RoHS + halogen-free (IEC 61249-2-21) | Meets global environmental compliance for export to EU, Japan, and North America without material declaration waivers |
| JESD 201 Class 1A whisker resistance | Ensures long-term reliability in high-humidity or high-temperature storage and reflow environments |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 12 V → 5 V/3.3 V buck-derived converters. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side MOSFET off-time; handles 3 A continuous and 125 A surge. Use Value: 35 ns trr prevents reverse recovery shoot-through; 0.95 V VF cuts conduction loss by ≥0.3 W vs. legacy FR107. | Use Scenario: Output stage rectification in 200–500 W solar microinverters with 100 kHz PWM. IC Role / Device Role / Timing Role: Unidirectional current path converting high-frequency AC from H-bridge to DC output; blocks 150 V reverse during dead-time. Use Value: 80 pF CJ and 10 °C/W RθJL suppress EMI and maintain <115 °C junction temp at full load. |
| Freewheeling Diodes | AC-DC Front-End Rectification |
Use Scenario: Inductive load flyback protection in 24 V industrial PLC output modules driving solenoids. IC Role / Device Role / Timing Role: Clamp inductive kickback energy during transistor turn-off; absorbs 125 A surge pulses. Use Value: 125 A IFSM rating eliminates need for parallel diodes; DO-201AD mechanical robustness withstands vibration. | Use Scenario: Input bridge rectification in universal-input (85–265 VAC) offline SMPS with PFC pre-regulator. IC Role / Device Role / Timing Role: High-voltage, high-surge rectifier handling line-frequency peaks and transient surges. Use Value: 150 V VRRM provides 2× margin over 115 VAC peak (162 V); 125 A IFSM survives lightning-induced line spikes. |
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 | VRRM = 600 V, trr = 35 ns, VF = 1.15 V @ 3 A - higher voltage rating but higher forward drop | Used where system-level overvoltage transients exceed 150 V; less efficient in 12–48 V outputs | Select when VRRM margin >2× nominal bus voltage is required; avoid if VF-driven thermal design is tight |
| ON Semi MUR315 | VRRM = 150 V, trr = 35 ns, VF = 0.92 V @ 3 A - identical voltage/speed, slightly lower VF, same DO-201AD package | Drop-in replacement in existing layouts; validated in automotive-grade 12 V DC-DC designs | Preferred for automotive qualification-critical designs; verify JESD 201 whisker compliance per batch |
Compared with STTH3L06S and MUR315, SF33G-A offers optimal balance of 150 V rating, 0.95 V VF, and 35 ns trr in cost-sensitive industrial power supplies - delivering lower conduction loss than STTH3L06S and broader temperature validation than MUR315.
Availability
SF33G-A is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, RoHS/halogen-free compliance, and DO-201AD mechanical compatibility.
Supply support for SF33G-A 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 industrial, computing, and consumer markets since 1979.
The SF series super fast rectifiers are designed specifically for high-frequency switching power supplies, emphasizing low VF, fast trr, and robust surge capability in standardized axial packages - targeting cost-effective, high-reliability replacements for legacy FRD families.
FAQ
What is the maximum junction temperature rating for SF33G-A?
The SF33G-A has a maximum junction temperature (TJ) of +150 °C, verified per absolute maximum ratings table. This allows operation in ambient temperatures up to +85 °C with appropriate PCB copper area or heatsinking. The device's 10 °C/W junction-to-lead thermal resistance ensures reliable thermal performance when mounted on ≥1 cm² of 2 oz copper.
Does SF33G-A meet RoHS and halogen-free requirements?
Yes, SF33G-A is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. Full material declarations and test reports are available upon request for SF33G-A.
What is the reverse recovery time test condition for SF33G-A?
SF33G-A reverse recovery time (trr) is specified as ≤35 ns under conditions: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, with measurement per JEDEC JESD24-11. This reflects real-world behavior in high-frequency flyback and LLC converter freewheeling paths.
Is SF33G-A pin-compatible with other DO-201AD rectifiers like UF33G or MUR315?
SF33G-A shares the DO-201AD package and axial pinout with UF33G and MUR315, making it mechanically interchangeable. However, electrical differences exist: UF33G has higher VF (~1.05 V), while MUR315 has slightly lower VF (0.92 V). Layout reuse is possible, but thermal and efficiency validation is recommended for SF33G-A.
What marking code appears on the SF33G-A device body?
The SF33G-A is marked "SF33G" on the device body, followed by a green compound indicator (G), date code (YWW), and factory code (F). No suffix "-A" appears on the physical marking - the "-A" denotes tape-and-reel packaging per ordering code SF33G-A.
SF33G-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
SF33G-A FAQ
1.How can I place an order for SF33G-A through Aetrix?
Please submit a Request for Quotation (RFQ) for SF33G-A 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 SF33G-A reliable?
The price and inventory of SF33G-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SF33G-A is usually 5 days.
3.What payment methods are accepted for SF33G-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SF33G-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SF33G-A?
SF33G-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SF33G-A 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 SF33G-A?
For technical support, including SF33G-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SF33G-A requirements.
6.How does Aetrix verify that SF33G-A is sourced from the original manufacturer or authorized distributors?
All SF33G-A 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 SF33G-A meets industry standards.
7.What is the process for return or replacement of SF33G-A?
All SF33G-A units undergo pre-shipment inspection (PSI). If there is an issue with SF33G-A, 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 SF33G-A part is unused and in its original packaging.
Return procedure for SF33G-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SF33G-A Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
