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Taiwan Semiconductor Corporation S1KFS MWG
- Part No.:
- S1KFS MWG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
S1KFS MWG.pdf
- Description:
- DIODE GEN PURP 800V 1A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:15,390
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Product details
Overview
S1KFS MWG from Taiwan Semiconductor is a 1A, 800V repetitive peak reverse voltage (VRRM) surface-mount standard rectifier diode in SOD-128 package, featuring glass-passivated junction, 30A surge capability (IFSM), and 150°C maximum junction temperature - used in DC-DC converters and switching-mode inverters.
For engineers reviewing the S1KFS MWG datasheet, S1KFS MWG pinout, S1KFS MWG application, or S1KFS MWG equivalent, key selection criteria include VRRM=800V, VF≤1.1V at 1A/25°C, IR≤1µA at 25°C, thermal resistance RθJA=82°C/W, and SOD-128 mechanical compatibility with automated placement.
Technical Context
The S1KFS MWG is a single-die, unidirectional silicon rectifier optimized for high-efficiency AC-to-DC and DC-to-DC power conversion. Its glass-passivated junction ensures stable reverse leakage (IR ≤ 1 µA @ 25°C, ≤50 µA @ 125°C) and robust surge tolerance (IFSM = 30 A, 8.3 ms half-sine).
Thermal performance is defined for PCB mounting on 5 mm × 5 mm copper pads: RθJL = 29°C/W and RθJC = 30°C/W confirm effective heat transfer from junction to lead and case, supporting continuous 1A operation within -55°C to +150°C junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines usable input voltage headroom in bridge or flyback designs. |
| IF | 1 A - Continuous average forward current rating at TA = 25°C; derates linearly above 25°C per forward current derating curve. |
| VF | ≤1.1 V @ IF = 1 A, TJ = 25°C - Forward voltage drop directly impacts conduction loss and thermal load in power stages. |
| IFSM | 30 A - Non-repetitive surge current capability; supports inrush and transient overload handling in SMPS startup. |
| IR | ≤1 µA @ VR = 800 V, TJ = 25°C - Low reverse leakage preserves efficiency in high-impedance bias networks and standby circuits. |
| RθJA | 82 °C/W - Junction-to-ambient thermal resistance on standard 5 mm × 5 mm Cu pad; determines required heatsinking for thermal margin. |
Pinout & Package
Package: SOD-128 - Surface-mount, flat-lead, single-diode outline with cathode band marking; moisture sensitivity level 1 (J-STD-020), RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of AC source or switch node; polarity must match layout to avoid reverse conduction failure. |
| Cathode | Forward current exit point | Marked by visible band; ties to output rail or positive bus; determines direction of rectified current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable IR performance across temperature and humidity, critical for long-term reliability in industrial power supplies. |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow, reducing manufacturing cost and process complexity for SMT lines. |
| Matte tin-plated leads | Ensures consistent solderability per J-STD-002, minimizing voiding and cold-joint risk in automated assembly. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, enhancing field reliability in automotive and telecom infrastructure. |
Applications
| DC–DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converters for server PSUs. IC Role / Device Role / Timing Role: Unidirectional current steering diode converting transformer secondary AC into regulated DC output. Use Value: 800V VRRM provides margin against reflected transients; low VF minimizes conduction loss at 1A load. | Use Scenario: Freewheeling path in H-bridge motor drives operating from 300V DC bus. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback during MOSFET turn-off. Use Value: 30A IFSM withstands short-circuit energy; 150°C TJ max supports high-ambient environments. |
| AC–DC Adapter | Industrial Power Supply |
Use Scenario: Output rectification in universal-input (90–264 VAC) 12W flyback adapters. IC Role / Device Role / Timing Role: High-voltage output diode delivering clean DC after transformer and filter stage. Use Value: 1µA IR at 25°C reduces no-load power consumption; SOD-128 footprint enables compact board layout. | Use Scenario: Input-stage bridge rectifier in 24V/5A industrial DIN-rail power modules. IC Role / Device Role / Timing Role: Discrete rectifying element in full-wave configuration replacing integrated bridges. Use Value: UL 94V-0 molding compound meets safety standards; RθJL = 29°C/W aids thermal management without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | VRRM = 800 V, IF = 1 A, VF ≈ 1.15 V @ 1 A, RθJA ≈ 75°C/W | Higher VF increases conduction loss; slightly better thermal resistance | Preferred where board-level thermal resistance dominates over junction loss. |
| ES1J | VRRM = 600 V, IF = 1 A, VF ≈ 0.95 V @ 1 A, SOD-123 package | Lower voltage rating limits use to ≤600V systems; smaller footprint but higher RθJA (~100°C/W) | Select only when system VR never exceeds 600V and space constraints outweigh thermal needs. |
Compared with STTH1R08 and ES1J, the S1KFS MWG offers balanced trade-offs: identical VRRM to STTH1R08 but lower VF, and superior voltage rating versus ES1J while maintaining SOD-128's thermal advantage over SOD-123.
Availability
S1KFS MWG is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-lifecycle support, and J-STD-020 Level 1 moisture handling.
Supply support for S1KFS MWG 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 power, automotive, and industrial markets since 1979.
The S1KFS MWG belongs to TSC's S1DFS–S1MFS standard rectifier family, engineered for cost-effective, high-reliability AC/DC and DC/DC power conversion in consumer, industrial, and telecom equipment.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for the S1KFS MWG?
The S1KFS MWG has a VRRM rating of 800 V, as specified in the Absolute Maximum Ratings table. This value is fixed for the S1KFS variant within the S1DFS–S1MFS series and defines the highest reverse voltage the diode can block repeatedly without breakdown under normal operating conditions.
Does the S1KFS MWG have a RoHS-compliant and halogen-free construction?
Yes, the S1KFS MWG is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance attributes are explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version C2103) and verified through material declarations.
What is the forward voltage (VF) of the S1KFS MWG at 1A and 25°C?
The S1KFS MWG exhibits a maximum forward voltage of 1.1 V at IF = 1.0 A and TJ = 25°C, with a typical value of 0.99 V. This parameter is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction losses in power conversion stages.
Is the S1KFS MWG suitable for automated SMT assembly?
Yes, the S1KFS MWG is designed for automated placement: it carries J-STD-020 Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002, and SOD-128 packaging compatible with standard pick-and-place equipment and reflow profiles.
What is the junction-to-ambient thermal resistance (RθJA) for the S1KFS MWG?
The S1KFS MWG has an RθJA of 82°C/W when mounted on a standard test board with 5 mm × 5 mm copper pads. This value is measured per JEDEC standards and guides thermal design for sustained 1A operation in ambient temperatures up to 75°C.
S1KFS MWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-128
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 9pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1KFS MWG FAQ
1.How can I place an order for S1KFS MWG through Aetrix?
Please submit a Request for Quotation (RFQ) for S1KFS MWG 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 S1KFS MWG reliable?
The price and inventory of S1KFS MWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KFS MWG is usually 5 days.
3.What payment methods are accepted for S1KFS MWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KFS MWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1KFS MWG?
S1KFS MWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1KFS MWG 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 S1KFS MWG?
For technical support, including S1KFS MWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KFS MWG requirements.
6.How does Aetrix verify that S1KFS MWG is sourced from the original manufacturer or authorized distributors?
All S1KFS MWG 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 S1KFS MWG meets industry standards.
7.What is the process for return or replacement of S1KFS MWG?
All S1KFS MWG units undergo pre-shipment inspection (PSI). If there is an issue with S1KFS MWG, 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 S1KFS MWG part is unused and in its original packaging.
Return procedure for S1KFS MWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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