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Taiwan Semiconductor Corporation 1N4148WS R9G
- Part No.:
- 1N4148WS R9G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
1N4148WS R9G.pdf
- Description:
- SOD-323F, 100V, 0.15A, SWITCHING
- Quantity:
- Payment:
- Shipping:
Inventory:9,855
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Product details
Overview
1N4148WS R9G from Taiwan Semiconductor is a high-speed SMD switching diode in SOD-323F package, rated for 150 mA forward current, 100 V repetitive peak reverse voltage, and 4 ns reverse recovery time. It serves as a fast-switching rectifier in DC/DC converters, SMPS, and lighting control circuits where low forward voltage drop and minimal charge storage are critical.
For engineers reviewing the 1N4148WS R9G datasheet, 1N4148WS R9G pinout, 1N4148WS R9G application, or 1N4148WS R9G equivalent, key selection criteria include reverse recovery time (≤4 ns), VF at 100 mA (≤1.00 V), IR at 75 V (≤5 µA), junction capacitance (≤4 pF), and thermal resistance (625 °C/W).
Technical Context
This discrete silicon switching diode uses a single-die planar construction optimized for high-speed turn-off. Its low trr (4 ns) and low CJ (4 pF) enable efficient operation in kHz–MHz switching topologies, while the 150°C maximum junction temperature supports use in thermally constrained PCB layouts.
The device features matte tin-plated leads compliant with J-STD-002 solderability, meets JESD201 Class 1A whisker resistance, and carries moisture sensitivity level 1 per J-STD-020 - enabling direct placement without bake-out prior to reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Max) | 150 mA - continuous forward current rating defines max steady-state conduction capability |
| VRRM | 100 V - peak reverse voltage tolerance determines max blocking capability in flyback or clamp circuits |
| trr | 4 ns - reverse recovery time directly impacts switching loss and EMI in high-frequency converters |
| VF @ 100 mA | 1.00 V - forward voltage at rated current sets conduction loss and thermal load in power paths |
| CJ @ 0 V | 4 pF - junction capacitance affects high-frequency impedance and signal integrity in RF or timing circuits |
| RθJA | 625 °C/W - junction-to-ambient thermal resistance indicates self-heating under 200 mW dissipation in still air |
Pinout & Package
SOD-323F surface-mount plastic package with cathode band marking; 2-terminal configuration; dimensions per EIAJ ED-7500A-1 / SC-90; 4.6 mg typical weight; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of switching node; polarity must match schematic symbol orientation |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential rail in rectification; defines directionality in clamp/flyback paths |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability (IFSM = 1 A, t = 1 µs) | Withstands transient overcurrent during startup or fault conditions without degradation |
| Moisture sensitivity level 1 | Zero bake requirement before SMT reflow - reduces process overhead and avoids thermal stress |
| Halogen-free green compound ("G" suffix) | Complies with IEC 61249-2-21; eliminates brominated flame retardants for RoHS and environmental compliance |
| Junction temperature range: –65°C to +150°C | Enables reliable operation across industrial and automotive under-hood ambient extremes |
Applications
| Switch-Mode Power Supply (SMPS) | LED Lighting Driver |
|---|---|
Use Scenario: High-frequency freewheeling and snubber diode in 100–500 kHz flyback or buck converters. IC Role / Device Role / Timing Role: Fast-recovery switching diode providing unidirectional current path and energy recycling. Use Value: 4 ns trr minimizes reverse recovery loss and improves efficiency >90% at 250 kHz; 100 V VRRM supports 48 V input designs. | Use Scenario: Constant-current regulation and PWM dimming path in low-voltage LED drivers. IC Role / Device Role / Timing Role: Synchronous rectifier or bias supply isolation diode in secondary-side control loops. Use Value: Low VF (1.00 V @ 100 mA) reduces conduction loss in compact LED modules; SOD-323F footprint saves board space. |
| On-Board DC/DC Converter | AC-DC Adapter Secondary Side |
Use Scenario: Output rectification in isolated 3.3 V/5 V/12 V point-of-load converters on embedded boards. IC Role / Device Role / Timing Role: Secondary-side output diode handling pulsed forward current with minimal stored charge. Use Value: 4 pF CJ limits capacitive loading on feedback networks; 150°C TJ max allows operation near FPGA or SoC heat sources. | Use Scenario: Output rectification and voltage clamping in low-power wall adapters (≤30 W). IC Role / Device Role / Timing Role: Primary-side snubber diode and secondary-side freewheeling element. Use Value: 300 mA non-repetitive surge rating handles inrush transients; RoHS-compliant matte tin plating ensures long-term solder joint reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F (Diodes Inc.) | Same SOD-323 package; VF = 0.85 V @ 10 mA (lower at light load); trr = 4 ns; VRRM = 100 V | Optimized for low-IQ bias networks; slightly tighter VF distribution at sub-10 mA | Preferred when circuit operates predominantly below 10 mA forward current |
| BAT54CW-7-F (Diodes Inc.) | Schottky architecture; VF = 0.33 V @ 100 mA; trr not specified (inherently fast); VRRM = 30 V only | Limited to ≤30 V blocking; lower conduction loss but higher leakage at elevated temperature | Select only if system reverse voltage stays below 30 V and ultra-low VF is prioritized over leakage control |
Compared with 1N4148WS R9G, 1N4148W-7-F offers marginally better low-current VF consistency, while BAT54CW-7-F trades blocking voltage for Schottky-level conduction efficiency - making 1N4148WS R9G the balanced choice for 100 V, 4 ns, 150 mA general-purpose switching.
Availability
1N4148WS R9G is available at Aetrix Electronics and suitable for switch-mode power supplies, LED lighting drivers, and on-board DC/DC converters requiring stable component supply and consistent SOD-323F tape-and-reel logistics.
Supply support for 1N4148WS R9G 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 consumer markets since 1979.
The 1N4148WS R9G belongs to TSC's high-speed switching diode product line, engineered specifically for high-frequency power conversion and signal routing applications demanding tight parametric consistency and robust SMT manufacturability.
FAQ
What is the maximum reverse recovery time (trr) specification for the 1N4148WS R9G?
The 1N4148WS R9G has a maximum reverse recovery time of 4 ns under test conditions of IF = 10 mA, IR = 60 mA, RL = 100 Ω, and IRR = 1 mA. This value is confirmed in the Electrical Specifications table of the official Taiwan Semiconductor datasheet (Version N2212). The 4 ns trr enables efficient operation in switching frequencies up to 500 kHz without excessive recovery loss.
Does the "R9G" suffix in 1N4148WS R9G indicate halogen-free material?
Yes, the "G" in 1N4148WS R9G denotes green compound compliant with IEC 61249-2-21, meaning it is halogen-free. The "R9" indicates 10,000 units per 13-inch tape-and-reel packaging. This matches Taiwan Semiconductor's ordering information table, where "G" is explicitly defined as halogen-free molding compound.
What is the junction-to-ambient thermal resistance (RθJA) of the 1N4148WS R9G?
The junction-to-ambient thermal resistance of the 1N4148WS R9G is 625 °C/W, measured under standard JEDEC test conditions (still air, no copper pour). This value appears in the Thermal Performance section of the datasheet and reflects the device's self-heating behavior when dissipating up to its 200 mW power limit in typical SOD-323F mounting configurations.
Is the 1N4148WS R9G suitable for use in automotive under-hood applications?
The 1N4148WS R9G supports a junction temperature range of –65°C to +150°C and meets JESD201 Class 1A whisker resistance, making it viable for under-hood environments where ambient temperatures reach 125°C. However, it is not AEC-Q200 qualified; designers requiring automotive qualification should verify additional stress testing or select an AEC-Q200–rated variant.
What marking code appears on the 1N4148WS R9G device body?
The 1N4148WS R9G is marked with "S1" on its SOD-323F package body, as specified in the Absolute Maximum Ratings table of the Taiwan Semiconductor datasheet. This distinguishes it from the 1N4448WS (marked "S2") and 1N914BWS (marked "S3"), ensuring correct visual identification during assembly and inspection.
1N4148WS R9G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4148WS R9G FAQ
1.How can I place an order for 1N4148WS R9G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148WS R9G 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 1N4148WS R9G reliable?
The price and inventory of 1N4148WS R9G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148WS R9G is usually 5 days.
3.What payment methods are accepted for 1N4148WS R9G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148WS R9G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148WS R9G?
1N4148WS R9G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148WS R9G 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 1N4148WS R9G?
For technical support, including 1N4148WS R9G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148WS R9G requirements.
6.How does Aetrix verify that 1N4148WS R9G is sourced from the original manufacturer or authorized distributors?
All 1N4148WS R9G 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 1N4148WS R9G meets industry standards.
7.What is the process for return or replacement of 1N4148WS R9G?
All 1N4148WS R9G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148WS R9G, 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 1N4148WS R9G part is unused and in its original packaging.
Return procedure for 1N4148WS R9G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148WS R9G Tags
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1N4148WX-TP
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1N4148TR
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