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Taiwan Semiconductor Corporation 1N4935G R0G
- Part No.:
- 1N4935G R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4935G R0G.pdf
- Description:
- DIODE GEN PURP 200V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,888
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Product details
Overview
1N4935G from Taiwan Semiconductor is a 1A, 200V fast recovery rectifier diode in DO-204AL (DO-41) package, optimized for high-efficiency switching power supplies with low forward voltage (VF ≤ 1.2 V at 1 A), fast reverse recovery time (trr ≤ 200 ns), and 30 A surge capability - used in DC-DC converters and SMPS front-end rectification.
For engineers reviewing the 1N4935G datasheet, 1N4935G pinout, 1N4935G application, or 1N4935G equivalent, key selection criteria include repetitive peak reverse voltage (200 V), thermal resistance (65 °C/W), junction capacitance (10 pF), and AEC-Q101 qualification availability across the family.
Technical Context
This single-die, unidirectional fast recovery rectifier operates with a maximum junction temperature of 150 °C and supports continuous forward current up to 1 A at ambient temperatures up to 75 °C (derated above). Its 200 V VRRM rating and 200 ns trr enable efficient operation in high-frequency switching topologies.
The device uses pure tin-plated leads compliant with J-STD-002, features UL 94V-0 mold compound, and meets JESD201 Class 2 whisker resistance - confirming suitability for automotive-grade and industrial power conversion where reliability under thermal cycling and mechanical stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines safe operating range in rectifier bridge or flyback snubber circuits. |
| IF | 1 A - Continuous average forward current; sets baseline conduction capacity for 25–75 °C ambient designs. |
| IFSM | 30 A - Non-repetitive surge current (8.3 ms half-sine); enables robustness against line transients and startup inrush. |
| trr | ≤200 ns - Reverse recovery time; minimizes switching losses and EMI in 50–500 kHz SMPS applications. |
| VF | ≤1.2 V @ 1 A, 25 °C - Low forward voltage drop; reduces conduction loss and improves system efficiency vs. standard rectifiers. |
| RθJA | 65 °C/W - Junction-to-ambient thermal resistance; determines required heatsinking for sustained 1 A operation in open-frame layouts. |
| CJ | 10 pF @ 1 MHz, 4 V - Junction capacitance; impacts high-frequency noise coupling and snubber design in resonant converters. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Lead finish: pure tin, solderable per J-STD-002. Weight: 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) in half-wave or full-wave configurations. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output capacitor positive or bus rail - must withstand full VRRM during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery (trr ≤ 200 ns) | Enables use in 100–500 kHz switching converters without excessive switching loss or ringing. |
| Low VF (≤1.2 V @ 1 A) | Reduces forward conduction loss by ~15–20% versus standard 1N400x series, improving thermal margin in compact layouts. |
| AEC-Q101 qualified option | Validated for automotive power modules requiring extended temperature cycling and humidity exposure compliance. |
| UL 94V-0 molding compound | Ensures flame retardancy in enclosed power supplies meeting IEC/EN 62368-1 safety requirements. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under long-term storage or thermal bias, critical for aerospace and medical-adjacent systems. |
Applications
| DC-DC Converter Rectification | Switching Inverter Output Stage |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V–48 V output DC-DC converters operating at 200–300 kHz. IC Role / Device Role / Timing Role: Unidirectional current steering and AC-to-DC conversion; no timing function. Use Value: 200 ns trr and 1.2 V VF minimize switching loss and heat generation, enabling higher power density than 1N4007-based designs. | Use Scenario: Freewheeling and output rectification in 3-phase motor drive inverters with 10–20 kHz PWM carrier. IC Role / Device Role / Timing Role: Passive rectifying element; blocks reverse voltage during MOSFET/IGBT off-time. Use Value: 30 A IFSM withstands motor stall currents; 200 V VRRM covers typical 300 V DC bus with safety margin. |
| AC-DC Adapter Input Bridge | Industrial Power Supply Snubber Diode |
Use Scenario: Single-diode in discrete 4-diode bridge for universal-input (85–265 VAC) offline adapters rated ≤15 W. IC Role / Device Role / Timing Role: Half-wave rectifier in cost-optimized bridge configuration. Use Value: DO-41 package allows manual insertion and wave soldering; 1 A IF supports continuous 12 W output with derating. | Use Scenario: Clamp/snubber diode across transformer primary in flyback converters with RCD networks. IC Role / Device Role / Timing Role: Fast turn-off path for leakage energy dissipation during MOSFET turn-off. Use Value: 200 ns trr ensures rapid voltage clamping before MOSFET avalanche, protecting switch integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02 | Same 1 A / 200 V rating; trr = 150 ns (faster), VF = 1.15 V; TO-220AC package (larger, higher thermal mass). | Preferred in thermally constrained 25–50 W designs requiring lower VF and better heatsinking; not axial-leaded. | Select when board space allows TO-220 mounting and sub-150 ns trr is needed for >400 kHz operation. |
| ON Semi MUR120 | 1 A / 200 V; trr = 75 ns (significantly faster), VF = 1.1 V; same DO-41 package; RoHS-compliant but not AEC-Q101 qualified. | Better suited for high-frequency PFC stages or noise-sensitive audio PSUs where ultra-fast recovery matters most. | Choose when fastest possible recovery is prioritized over automotive qualification; verify lead finish compatibility with assembly process. |
Compared with STTH1R02 and MUR120, the 1N4935G offers balanced performance in VF, trr, and package size for cost-sensitive 10–20 W industrial and consumer SMPS - with optional AEC-Q101 qualification unavailable in either alternative.
Availability
1N4935G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and general-purpose power rectification requiring stable component supply, consistent DO-41 form factor, and traceable green compound sourcing.
Supply support for 1N4935G 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, computing, and automotive markets since 1979.
The 1N493xG series belongs to TSC's high-reliability fast recovery rectifier product line, engineered specifically for efficiency-critical switching power supplies where low VF, controlled trr, and robust surge handling are mandatory.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the 1N4935G?
The 1N4935G has a VRRM of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation. This rating is confirmed in the Absolute Maximum Ratings table and defines its safe use in 100–150 VDC bus applications with appropriate derating. Exceeding this voltage risks avalanche breakdown and permanent damage to the 1N4935G.
Is the 1N4935G suitable for automotive applications?
The base 1N4935G is not AEC-Q101 qualified, but the pin-compatible 1N4935GH variant is explicitly qualified to AEC-Q101. For automotive-grade deployment, specify 1N4935GH - it undergoes stress testing for temperature cycling, humidity, and mechanical shock per AEC standards, while retaining identical electrical specs and DO-41 packaging as the 1N4935G.
What is the forward voltage drop (VF) of the 1N4935G at rated current?
The 1N4935G exhibits a maximum forward voltage drop of 1.2 V at 1 A forward current and 25 °C junction temperature. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss - actual VF decreases slightly at lower currents or higher temperatures, directly impacting thermal design of the 1N4935G in continuous operation.
Does the 1N4935G have a specified reverse recovery time (trr)?
Yes, the 1N4935G has a maximum reverse recovery time (trr) of 200 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is critical for minimizing switching losses in high-frequency converters; values are guaranteed across the full temperature range and confirm its classification as a fast recovery, not standard, rectifier.
What package type does the 1N4935G use, and are leads lead-free?
The 1N4935G uses the DO-204AL (DO-41) axial package with pure tin-plated leads compliant with J-STD-002 solderability requirements. It is RoHS-compliant and halogen-free per IEC 61249-2-21 - no lead content is present, and the "G" suffix denotes green compound. The cathode is marked by a visible band on the body.
1N4935G R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 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 @ 200 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
1N4935G R0G FAQ
1.How can I place an order for 1N4935G R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4935G R0G 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 1N4935G R0G reliable?
The price and inventory of 1N4935G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4935G R0G is usually 5 days.
3.What payment methods are accepted for 1N4935G R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4935G R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4935G R0G?
1N4935G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4935G R0G 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 1N4935G R0G?
For technical support, including 1N4935G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4935G R0G requirements.
6.How does Aetrix verify that 1N4935G R0G is sourced from the original manufacturer or authorized distributors?
All 1N4935G R0G 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 1N4935G R0G meets industry standards.
7.What is the process for return or replacement of 1N4935G R0G?
All 1N4935G R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4935G R0G, 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 1N4935G R0G part is unused and in its original packaging.
Return procedure for 1N4935G R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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