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Taiwan Semiconductor Corporation 1N4933G-K
- Part No.:
- 1N4933G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4933G-K.pdf
- Description:
- 200NS, 1A, 50V, FAST RECOVERY RE
- Quantity:
- Payment:
- Shipping:
Inventory:5,574
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Product details
Overview
1N4933G-K from Taiwan Semiconductor is a 1A, 50V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 200 ns reverse recovery time, 1.2 V forward voltage at 1 A, and 30 A surge current capability; used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the 1N4933G-K datasheet, 1N4933G-K pinout, 1N4933G-K application, or 1N4933G-K equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (65 °C/W), junction temperature range (−55 to +150 °C), RoHS/halogen-free compliance, and DO-41 mechanical compatibility.
Technical Context
This discrete silicon rectifier uses a single-die construction optimized for fast switching in high-frequency power conversion. Its 200 ns trr and low VF support efficient operation in flyback and forward converter topologies where rapid turn-off minimizes switching losses.
The device operates across −55 °C to +150 °C junction temperature with 65 °C/W junction-to-ambient thermal resistance, enabling reliable performance in compact, convection-cooled designs without forced airflow or heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; defines safe operating limit in rectification circuits |
| IF | 1 A - continuous forward current rating; determines steady-state power handling without derating |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload tolerance |
| trr | 200 ns - reverse recovery time; enables stable operation up to ~500 kHz switching frequencies |
| VF | 1.2 V @ 1 A, 25°C - forward voltage drop; directly impacts conduction loss and thermal design |
| RθJA | 65 °C/W - thermal resistance from junction to ambient; sets temperature rise per watt dissipated in DO-41 package |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking; leads are pure tin plated, solderable per J-STD-002, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of AC input or transformer secondary in half-wave/full-wave rectifier |
| Cathode | Forward current exit point | Marked by band; connects to output capacitor or load return; defines polarity-sensitive placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 200 ns trr enables high-frequency switching with minimal reverse recovery loss in SMPS |
| Low forward voltage | 1.2 V VF at 1 A reduces conduction loss and improves efficiency in 5–24 V output converters |
| High surge capability | 30 A IFSM withstands cold-start surges and line transients without failure |
| RoHS & halogen-free | Complies with IEC 61249-2-21; suitable for consumer and industrial products requiring green manufacturing |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Isolated buck-boost and flyback converters in telecom power modules delivering 5–12 V outputs. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; critical for energy transfer timing and voltage regulation. Use Value: 200 ns trr prevents cross-conduction loss during MOSFET dead-time, improving overall efficiency by ≥2% vs. standard rectifiers. | Use Scenario: Single-phase H-bridge inverters converting 24–48 V DC to 115/230 V AC for UPS and solar microinverters. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during PWM transitions; defines safe commutation window. Use Value: 30 A IFSM handles motor startup surges; 150 °C max junction temperature ensures reliability under sustained 40 °C ambient conditions. |
| AC-DC Adapters | Industrial Control Power Supplies |
Use Scenario: Compact wall adapters for IoT gateways and PoE-powered devices requiring <10 W output. IC Role / Device Role / Timing Role: Secondary-side rectifier in quasi-resonant flyback topology; synchronizes with primary-side ZVS timing. Use Value: 1.2 V VF limits self-heating in sealed enclosures; DO-41 footprint allows direct replacement of legacy 1N400x series with improved efficiency. | Use Scenario: 24 V auxiliary power rails in PLC I/O modules and motor drive logic boards. IC Role / Device Role / Timing Role: Input bridge rectifier feeding bulk capacitor; must survive repeated 100 Hz ripple and ESD events. Use Value: −55 to +150 °C TJ range supports operation in unventilated cabinets; 5 µA IR at 25 °C ensures low standby leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4933G | No-K suffix; same electrical specs but supplied in ammo box (3,000 pcs) instead of tape & reel (5,000 pcs) | Identical performance; differs only in packaging format and reel compatibility | Select 1N4933G-K for automated SMT placement; choose 1N4933G for manual or semi-automated assembly |
| STTH1R06 | Same 1 A / 600 V rating but 150 ns trr, 1.7 V VF, TO-220AC package | Higher voltage margin and faster recovery, but requires heatsink due to higher VF and larger package | Choose STTH1R06 only when >50 V reverse stress or >1 MHz switching is required; not a drop-in replacement |
Compared with 1N4933G-K, 1N4933G offers identical electrical behavior but different packaging logistics, while STTH1R06 trades higher VF and thermal mass for extended voltage and speed-making it unsuitable for space-constrained 50 V designs where DO-41 fit and 1.2 V VF are essential.
Availability
1N4933G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial control power supplies requiring stable component supply with consistent DO-41 form factor and RoHS compliance.
Supply support for 1N4933G-K 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 global industrial and consumer markets since 1979.
The 1N493xG-K series belongs to TSC's fast recovery rectifier product line, engineered specifically for high-efficiency, cost-sensitive switch-mode power conversion in compact, thermally constrained environments.
FAQ
What is the maximum junction temperature rating for the 1N4933G-K?
The 1N4933G-K has a maximum junction temperature (TJ) of +150 °C and a minimum of −55 °C. This wide operating range allows deployment in automotive under-hood auxiliary supplies and industrial controllers exposed to elevated ambient temperatures. Thermal design must respect the 65 °C/W RθJA to avoid exceeding this limit under full 1 A load.
Does the 1N4933G-K have a halogen-free construction?
Yes, the 1N4933G-K is halogen-free in accordance with IEC 61249-2-21 and RoHS compliant. The molding compound contains no brominated or chlorinated flame retardants, and the pure tin-plated leads meet J-STD-002 solderability requirements-critical for environmentally regulated end equipment like EU medical and consumer devices.
What is the reverse recovery time (trr) specification for the 1N4933G-K?
The 1N4933G-K has a maximum reverse recovery time (trr) of 200 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the Electrical Specifications table and enables use in switching power supplies operating up to 500 kHz without significant recovery-related losses.
Is the 1N4933G-K pin-compatible with the 1N400x series?
No, the 1N4933G-K is not pin-compatible with the 1N400x series despite sharing the DO-41 package. While both use axial DO-41 leads, the 1N4933G-K is a fast recovery rectifier (200 ns trr), whereas 1N400x parts are general-purpose (≈2–4 µs trr) with different doping profiles and thermal characteristics-direct substitution may cause overheating or EMI issues in high-frequency designs.
What packaging options are available for the 1N4933G-K?
The 1N4933G-K is supplied in tape-and-reel format containing 5,000 units per reel, optimized for automated pick-and-place assembly. An alternate version, 1N4933G-K A0G, is available in 3,000-unit ammo boxes for manual or semi-automated production. Both share identical electrical and mechanical specifications including DO-204AL (DO-41) outline and cathode band polarity marking.
1N4933G-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 200 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
1N4933G-K FAQ
1.How can I place an order for 1N4933G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4933G-K 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 1N4933G-K reliable?
The price and inventory of 1N4933G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4933G-K is usually 5 days.
3.What payment methods are accepted for 1N4933G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4933G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4933G-K?
1N4933G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4933G-K 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 1N4933G-K?
For technical support, including 1N4933G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4933G-K requirements.
6.How does Aetrix verify that 1N4933G-K is sourced from the original manufacturer or authorized distributors?
All 1N4933G-K 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 1N4933G-K meets industry standards.
7.What is the process for return or replacement of 1N4933G-K?
All 1N4933G-K units undergo pre-shipment inspection (PSI). If there is an issue with 1N4933G-K, 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 1N4933G-K part is unused and in its original packaging.
Return procedure for 1N4933G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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