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Taiwan Semiconductor Corporation 1N4936G-K
- Part No.:
- 1N4936G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4936G-K.pdf
- Description:
- 200NS, 1A, 400V, FAST RECOVERY R
- Quantity:
- Payment:
- Shipping:
Inventory:7,842
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Product details
Overview
1N4936G-K from Taiwan Semiconductor is a single-die fast recovery rectifier diode in DO-204AL (DO-41) package, rated for 1 A average forward current, 400 V repetitive peak reverse voltage (VRRM), and 200 ns reverse recovery time (trr). It delivers low forward voltage drop (1.2 V at 1 A, 25°C) and high surge capability (30 A IFSM), making it suitable for switching-mode DC/DC converters requiring efficient unidirectional conduction.
For engineers reviewing the 1N4936G-K datasheet, 1N4936G-K pinout, 1N4936G-K application, or 1N4936G-K equivalent, key selection criteria include its 400 V VRRM rating, 200 ns trr for high-frequency operation, DO-41 mechanical compatibility, RoHS/halogen-free compliance, and thermal resistance of 65 °C/W - all critical for power supply reliability and layout reuse.
Technical Context
The 1N4936G-K employs a planar epitaxial silicon junction structure optimized for fast recovery with controlled minority-carrier lifetime. Its 200 ns trr is measured under standardized conditions (IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A), enabling stable operation in 20–100 kHz switching converters without excessive switching loss.
Thermally, the device features a junction-to-ambient thermal resistance of 65 °C/W in free-air conditions and operates across –55°C to +150°C junction temperature range. The pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 1A whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse voltage the diode blocks reliably in circuit |
| IF(AV) | 1 A - Continuous average forward current handling capacity at TA = 75°C with adequate heatsinking |
| trr | 200 ns - Reverse recovery time defining minimum off-time for safe hard-switching at ~500 kHz |
| VF | 1.2 V @ 1 A, 25°C - Forward voltage drop directly impacting conduction loss and thermal load |
| IFSM | 30 A - Peak non-repetitive surge current tolerance during startup or fault transients |
| RθJA | 65 °C/W - Junction-to-ambient thermal resistance used to calculate max allowable power dissipation |
| IR | 5 µA @ 25°C, 400 V - Reverse leakage current affecting standby power and high-impedance node integrity |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. Lead finish: pure tin, J-STD-002 compliant. Weight: 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential side (e.g., switch node or transformer secondary center-tap) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or filter capacitor; polarity must be observed to prevent breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Fast recovery time | 200 ns trr enables use in 20–100 kHz SMPS without significant switching loss penalty |
| Low forward voltage | 1.2 V VF at 1 A reduces conduction loss by ~15% vs. standard 1N400x series |
| High surge rating | 30 A IFSM supports robust startup and short-circuit withstand in offline adapters |
| RoHS & halogen-free | Complies with IEC 61249-2-21; eliminates brominated flame retardants in molding compound |
| DO-41 mechanical standardization | Enables direct footprint reuse across 1N4933G-K to 1N4937G-K family for BOM flexibility |
Applications
| DC/DC Converter Output Rectification | Switch-Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; timing role defined by trr limiting maximum switching frequency. Use Value: 200 ns trr minimizes reverse recovery charge (Qrr), reducing EMI and MOSFET turn-on loss during synchronous rectification transitions. | Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during PWM off-time; timing role governed by trr to avoid shoot-through in bridge legs. Use Value: 30 A IFSM withstands inductive kick energy without degradation, while 1.2 V VF limits heat generation during continuous freewheeling. |
| AC-DC Adapter Input Bridge Leg | Industrial Sensor Power Supply Protection |
Use Scenario: One leg of a 4-diode full-wave bridge rectifier in universal-input (85–265 VAC) offline adapters. IC Role / Device Role / Timing Role: Half-wave rectifier conducting during positive/negative AC half-cycles; VRRM = 400 V ensures margin above 265 VAC × √2 ≈ 375 V peak. Use Value: 65 °C/W RθJA allows reliable operation at 70°C ambient without forced air, supporting compact adapter designs. | Use Scenario: Reverse polarity and overvoltage protection in 12–24 V DC-powered industrial sensors with limited PCB space. IC Role / Device Role / Timing Role: Polarity guard diode placed in series with input; no timing function but relies on low VF to minimize voltage drop. Use Value: 1.2 V VF adds only 10% loss at 1 A, preserving sensor operating voltage; DO-41 footprint simplifies manual repair and replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | 600 V VRRM, 1.05 V VF @ 1 A, 75 ns trr, SOD-123FL package | Higher voltage rating and faster recovery, but surface-mount only | Select when higher VRRM margin or SMT assembly is required; not mechanically interchangeable |
| ON Semiconductor MUR140 | 400 V VRRM, 1.25 V VF @ 1 A, 50 ns trr, DO-41 package | Near-identical VRRM and package, but significantly faster trr and slightly higher VF | Drop-in replacement for higher-frequency designs where <100 ns trr is needed; same footprint and polarity marking |
Compared with STTH1L06S and MUR140, the 1N4936G-K offers balanced performance for cost-sensitive through-hole SMPS designs: its 200 ns trr suits 50–100 kHz operation, DO-41 package enables easy prototyping and repair, and 1.2 V VF maintains efficiency without demanding ultra-low-loss specs.
Availability
1N4936G-K is available at Aetrix Electronics and suitable for DC/DC converters, switching-mode inverters, and industrial power supplies requiring stable component supply, long-term BOM continuity, and RoHS-compliant discrete diodes.
Supply support for 1N4936G-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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer applications.
The 1N493xG-K series was designed specifically for cost-effective, high-reliability AC/DC and DC/DC power conversion in space-constrained through-hole designs, emphasizing fast recovery, thermal robustness, and green material compliance.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for the 1N4936G-K?
The 1N4936G-K has a VRRM rating of 400 V, meaning it can reliably block up to 400 V of repetitive reverse voltage without breakdown. This value is specified per the Taiwan Semiconductor datasheet Version B2104 and is confirmed across all electrical test conditions at 25°C ambient. Exceeding this voltage risks avalanche failure or permanent damage to the 1N4936G-K.
Does the 1N4936G-K have a specified reverse recovery time (trr), and under what conditions is it measured?
Yes, the 1N4936G-K has a maximum reverse recovery time (trr) of 200 ns. This value is measured under the standardized condition: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the Taiwan Semiconductor datasheet. The 1N4936G-K's trr enables stable operation in switching power supplies operating up to approximately 100 kHz without excessive switching loss.
What package type does the 1N4936G-K use, and how is polarity indicated?
The 1N4936G-K uses the DO-204AL (DO-41) axial-leaded package. Polarity is clearly indicated by a visible cathode band printed on the body - the banded end is the cathode terminal. This marking aligns with JEDEC standards and ensures correct orientation during manual or automated placement of the 1N4936G-K in circuit boards.
Is the 1N4936G-K RoHS and halogen-free compliant?
Yes, the 1N4936G-K is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants, and the pure tin-plated leads meet J-STD-002 solderability requirements. These environmental qualifications are explicitly stated in the Taiwan Semiconductor product documentation for the 1N4936G-K.
What is the forward voltage (VF) of the 1N4936G-K at its rated current?
The 1N4936G-K has a maximum forward voltage (VF) of 1.2 V when conducting 1 A at 25°C junction temperature. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At higher temperatures or continuous DC, VF decreases slightly due to negative temperature coefficient, but design margins should be based on the 1.2 V spec for the 1N4936G-K.
1N4936G-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):
- 400 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 @ 400 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
1N4936G-K FAQ
1.How can I place an order for 1N4936G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4936G-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 1N4936G-K reliable?
The price and inventory of 1N4936G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4936G-K is usually 5 days.
3.What payment methods are accepted for 1N4936G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4936G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4936G-K?
1N4936G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4936G-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 1N4936G-K?
For technical support, including 1N4936G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4936G-K requirements.
6.How does Aetrix verify that 1N4936G-K is sourced from the original manufacturer or authorized distributors?
All 1N4936G-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 1N4936G-K meets industry standards.
7.What is the process for return or replacement of 1N4936G-K?
All 1N4936G-K units undergo pre-shipment inspection (PSI). If there is an issue with 1N4936G-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 1N4936G-K part is unused and in its original packaging.
Return procedure for 1N4936G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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