My Inquiry
My Account
Taiwan Semiconductor Corporation S15KLW
- Part No.:
- S15KLW
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
S15KLW.pdf
- Description:
- 1.5A, 800V, STANDARD RECOVERY RE
- Quantity:
- Payment:
- Shipping:
Inventory:16,900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
S15KLW from Taiwan Semiconductor is a 1.5A, 800V standard surface-mount silicon rectifier diode in SOD-123W package, designed for high-efficiency DC/DC conversion and switching-mode power supplies. It features 50A peak surge current capability, 175°C maximum junction temperature, and low forward voltage (1.10V max at 1.5A, 25°C), enabling compact, thermally robust power stage designs.
For engineers reviewing the S15KLW datasheet, S15KLW pinout, S15KLW application, or S15KLW equivalent, key selection considerations include its 800V VRRM rating, SOD-123W thermal performance (RθJA = 85°C/W), moisture sensitivity level 1 compliance, and cathode-band polarity marking for automated placement verification.
Technical Context
The S15KLW is a single-die, planar-passivated silicon PN junction rectifier optimized for fast recovery in medium-voltage switching applications. Its electrical behavior is defined by a maximum reverse leakage of 1 µA at 25°C and 100 µA at 125°C, and a typical junction capacitance of 10 pF at 4V reverse bias.
Thermally, it delivers RθJL = 29°C/W and RθJC = 31°C/W when mounted on a 5mm × 5mm copper pad PCB, supporting reliable operation up to 175°C junction temperature under continuous 1.5A forward conduction with appropriate board-level heat sinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines usable input voltage range in offline or high-bus DC/DC stages. |
| IF | 1.5 A - Continuous average forward current rating at TA = 25°C; determines steady-state power handling in rectification paths. |
| IFSM | 50 A - Peak non-repetitive surge current (8.3 ms half-sine); supports inrush and transient overload tolerance in SMPS startup. |
| VF (max) | 1.10 V @ 1.5A, 25°C - Forward voltage drop ceiling; directly impacts conduction loss (Pcond ≈ IF × VF) and thermal design margin. |
| TJ max | 175 °C - Maximum allowable junction temperature; enables operation in high-ambient industrial environments with derated current. |
| RθJA | 85 °C/W - Junction-to-ambient thermal resistance on standard test board; used to calculate temperature rise under real PCB layout conditions. |
Pinout & Package
Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity indicator. Weight: 0.019 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 bridge or half-wave configurations. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; connects to output capacitor positive rail or load return; must withstand full VRRM during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Moisture Sensitivity Level 1 | Enables direct placement without baking or dry-pack requirements, reducing manufacturing overhead and avoiding moisture-induced popcorning. |
| RoHS & Halogen-Free Compliance | Meets IEC 61249-2-21 and EU RoHS directives, supporting environmentally regulated industrial and consumer product certifications. |
| High Surge Current Capability (50A) | Withstands repetitive line transients and inrush events without degradation, extending reliability in unregulated input stages. |
| Low Forward Voltage (1.10V max) | Reduces conduction losses by ~15% vs. legacy 1N400x series at 1.5A, improving efficiency in space-constrained 12–48V DC/DC modules. |
Applications
| AC-DC Adapter Input Rectification | Isolated Flyback Secondary Side |
|---|---|
Use Scenario: 85–265V AC input rectified to high-voltage DC bus in compact wall adapters. IC Role / Device Role / Timing Role: Standard rectifier diode conducting during positive half-cycles; provides unidirectional current path before bulk capacitor filtering. Use Value: 800V VRRM safely handles 265V AC × √2 ≈ 375V peak plus safety margin; SOD-123W footprint minimizes board area versus DO-214AA. | Use Scenario: Output rectification in 5–24V isolated flyback converters for IoT gateways and PoE-powered devices. IC Role / Device Role / Timing Role: Freewheeling diode clamping transformer reset energy and delivering regulated output current. Use Value: 1.10V VF maximizes output efficiency at light-to-moderate loads; 175°C TJ rating allows operation near enclosed heatsinks or under sealed enclosures. |
| DC-DC Buck Converter Input Stage | Industrial Motor Drive Snubber Network |
Use Scenario: High-side rectification in 24–48V input buck-derived auxiliary rails for PLC I/O modules. IC Role / Device Role / Timing Role: Input-stage freewheeling diode during high-side switch off-time in non-synchronous buck topologies. Use Value: 50A IFSM absorbs MOSFET turn-off spikes; SOD-123W thermal resistance supports >1.2A continuous current with minimal copper pour. | Use Scenario: RC snubber clamp across IGBT collector-emitter in 3-phase 400V motor inverters. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing inductive kickback energy during IGBT commutation. Use Value: 800V VRRM exceeds 400V DC bus + 2× overvoltage margin; low CJ (10 pF) minimizes capacitive loading on gate drive signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L08S | 1A, 800V, SOD-123FL package; VF = 1.15V max @ 1A; RθJA = 110°C/W | Lower current rating and higher thermal resistance limit use to ≤1A continuous loads | Select when footprint compatibility is required but system current remains ≤1A and ambient temperature is moderate. |
| ON Semi MUR160 | 1.5A, 600V, DO-41 through-hole; VF = 1.0V max @ 1.5A; IFSM = 50A | Through-hole mounting and 600V VRRM restrict suitability to lower-input-voltage or non-automated assembly contexts | Prefer for legacy through-hole designs or where 600V rating suffices and manual soldering is acceptable. |
Compared with STTH1L08S and MUR160, the S15KLW uniquely combines 1.5A current, 800V blocking, SOD-123W surface-mount compatibility, and industry-leading RθJA (85°C/W), making it optimal for high-density, automated, medium-voltage power supply designs requiring thermal headroom.
Availability
S15KLW is available at Aetrix Electronics and suitable for DC/DC converters, switching-mode inverters, and general-purpose rectification requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS-compliant sourcing.
Supply support for S15KLW 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 markets.
The S15KLW belongs to TSC's S15xLW family of standard rectifiers engineered for high-volume automated assembly in space-constrained power conversion systems, balancing surge robustness, thermal efficiency, and JEDEC-compliant packaging.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for the S15KLW?
The S15KLW has a VRRM rating of 800 V, as specified in the absolute maximum ratings table for the S15DLW–S15MLW series. This value is fixed for the "K" variant and confirmed by the marking code "15KLW" on the device body. The S15KLW must not be subjected to reverse voltages exceeding this rating to ensure reliable long-term operation.
Does the S15KLW have a specified forward voltage (VF) at elevated temperature?
Yes, the S15KLW datasheet specifies VF = 0.87 V (typical) and 1.05 V (maximum) at IF = 1.5 A and TJ = 125°C. This elevated-temperature VF data confirms stable conduction performance in thermally demanding environments such as enclosed power supplies or high-ambient industrial settings where the S15KLW operates.
Is the S15KLW compatible with lead-free reflow soldering processes?
Yes, the S15KLW uses matte tin-plated leads compliant with J-STD-002 and is rated for moisture sensitivity level 1 per J-STD-020, meaning it can undergo standard lead-free reflow profiles (e.g., JEDEC J-STD-020 Class 3 peak of 260°C) without baking or special handling-critical for high-yield SMT assembly of the S15KLW.
What is the junction-to-ambient thermal resistance (RθJA) of the S15KLW, and how is it measured?
The S15KLW has an RθJA of 85°C/W, measured on a standard 5 mm × 5 mm copper pad test board per JEDEC JESD51-2. This value applies to the SOD-123W package in still air and serves as the baseline for estimating junction temperature rise under real-world PCB layouts when using the S15KLW in power circuits.
How does the S15KLW differ from the S15MLW in terms of electrical specifications?
The S15KLW and S15MLW share identical IF (1.5 A), IFSM (50 A), TJ max (175°C), and package (SOD-123W), but differ only in VRRM: S15KLW is rated for 800 V, while S15MLW is rated for 1000 V. All other parameters-including VF, IR, and thermal resistance-are unchanged across the S15xLW series, making the S15KLW the optimal choice where 800 V blocking suffices.
S15KLW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1.5 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 175°C
S15KLW FAQ
1.How can I place an order for S15KLW through Aetrix?
Please submit a Request for Quotation (RFQ) for S15KLW 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 S15KLW reliable?
The price and inventory of S15KLW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S15KLW is usually 5 days.
3.What payment methods are accepted for S15KLW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S15KLW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S15KLW?
S15KLW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S15KLW 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 S15KLW?
For technical support, including S15KLW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S15KLW requirements.
6.How does Aetrix verify that S15KLW is sourced from the original manufacturer or authorized distributors?
All S15KLW 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 S15KLW meets industry standards.
7.What is the process for return or replacement of S15KLW?
All S15KLW units undergo pre-shipment inspection (PSI). If there is an issue with S15KLW, 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 S15KLW part is unused and in its original packaging.
Return procedure for S15KLW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S15KLW Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
