My Inquiry
My Account
Taiwan Semiconductor Corporation SK54C R6
- Part No.:
- SK54C R6
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK54C R6.pdf
- Description:
- DIODE SCHOTTKY 40V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SK54C R6 from Taiwan Semiconductor is a 5A, 40V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (0.55 V at 5 A, 25°C), high surge capability (120 A), and junction temperature up to 150°C. It serves as the primary output rectifier in AC/DC adapters and DC/DC converters.
For engineers reviewing the SK54C R6 datasheet, SK54C R6 pinout, SK54C R6 application, or SK54C R6 equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 0.55 V forward drop at rated current, 13 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 rating, and cathode-band polarity marking - all critical for thermal management and automated assembly validation.
Technical Context
The SK54C R6 implements a single-die Schottky structure with guard ring overvoltage protection, enabling robust operation under transient voltage stress in high-frequency switching topologies. Its low VF and high IFSM support efficient energy transfer in continuous conduction mode (CCM) and boundary conduction mode (BCM) converters.
Thermal performance is defined by RθJL = 13 °C/W on a 16 mm × 16 mm PCB copper pad, allowing reliable 5 A DC operation without forced airflow. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for industrial-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 36 V nominal output rails. |
| IF | 5 A - Continuous forward current rating; supports typical 60–75 W adapter outputs with margin. |
| VF @ 5 A, 25°C | 0.55 V - Low conduction loss enables >92% efficiency in 12 V/5 A secondary-side rectification. |
| IFSM | 120 A - Peak non-repetitive surge current; withstands inrush and short-circuit transients in SMPS. |
| RθJL | 13 °C/W - Junction-to-lead thermal resistance; enables direct heat transfer to PCB copper, reducing thermal derating. |
| TJ max | 150 °C - Maximum junction temperature; allows operation in enclosed, thermally constrained enclosures. |
| Moisture Sensitivity | Level 1 (per J-STD-020) - No bake requirement before reflow; compatible with standard SMT assembly lines. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads and cathode band polarity indicator. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward current flow | Connected to transformer secondary or switch node; low-resistance path minimizes conduction loss. |
| Cathode | Output terminal for forward current flow | Marked by black band; connects to output filter capacitor and load; carries full output current. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 0.55 V at 5 A, 25°C - Reduces power dissipation to ≤2.75 W, easing thermal design in compact adapters. |
| Guard ring structure | Enhanced edge termination - Improves ruggedness against dv/dt-induced avalanche and line transients. |
| High surge current rating | 120 A (8.3 ms half-sine) - Survives repeated cold-start surges and output short-circuit events. |
| RoHS & halogen-free | Compliant per EU Directive 2011/65/EU and IEC 61249-2-21 - Meets environmental requirements for global OEM shipments. |
| Automated placement compatibility | DO-214AB footprint with standardized tape-and-reel packaging (3,000 pcs/reel) - Enables high-yield pick-and-place integration. |
Applications
| AC/DC Adapters | LED Drivers |
|---|---|
Use Scenario: 12 V / 5 A wall-mounted power adapter for consumer electronics. IC Role / Device Role / Timing Role: Output synchronous rectifier replacing conventional diode in flyback secondary stage. Use Value: 0.55 V forward drop reduces conduction loss by ~35% vs. 1N5822, improving no-load efficiency and thermal margin. |
Use Scenario: Constant-current LED driver for commercial downlights (24 V input, 350 mA output). IC Role / Device Role / Timing Role: Freewheeling diode in buck converter topology during switch-off phase. Use Value: 120 A surge rating handles LED string open-circuit transients; DO-214AB footprint fits tight board spacing. |
| Industrial SMPS | USB PD Power Delivery |
Use Scenario: 24 V / 3 A regulated supply for PLC I/O modules in factory automation. IC Role / Device Role / Timing Role: Secondary-side rectifier in active-clamp forward converter. Use Value: 150°C max junction temperature supports operation in sealed enclosures with ambient up to 70°C. |
Use Scenario: 20 V output rail in USB PD 3.0 compliant charger (PPS capable). IC Role / Device Role / Timing Role: Output rectifier in synchronous flyback with 100 kHz–300 kHz switching. Use Value: Low RθJL (13 °C/W) maintains <100°C junction temp at 5 A, avoiding thermal shutdown during PPS negotiation bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS54 (ON Semiconductor) | VRRM = 40 V, IF = 5 A, VF = 0.55 V, same DO-214AB package but RθJA = 60 °C/W (vs. SK54C R6's 53 °C/W) | Slightly higher thermal resistance may require larger copper area for same power dissipation | Preferred where ON Semi supply chain alignment is required; verify layout copper area matches thermal model. |
| SB540 (Diodes Inc.) | VRRM = 40 V, IF = 5 A, VF = 0.54 V, DO-214AB, but IFSM = 100 A (vs. 120 A) and MSL level 1 confirmed only for tape-and-reel, not bulk | Lower surge rating limits use in high-inrush applications like motor-driven loads | Valid for cost-sensitive consumer designs with moderate surge exposure; avoid in industrial adapters with frequent hot-plug cycles. |
Compared with SS54 and SB540, the SK54C R6 offers superior surge robustness (120 A), tighter thermal resistance control (RθJL = 13 °C/W), and guaranteed MSL Level 1 across all packaging formats - making it optimal for high-reliability, thermally constrained, and high-volume automated production environments.
Availability
SK54C R6 is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and industrial SMPS requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for SK54C R6 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 devices, and MOSFETs for industrial and consumer markets.
The SK54C R6 belongs to TSC's SK5xC Schottky rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification in switching power supplies operating up to 300 kHz.
FAQ
What is the maximum junction temperature rating for the SK54C R6?
The SK54C R6 has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official TSC datasheet (Version S2311). This rating enables reliable operation in thermally demanding applications such as enclosed industrial power supplies and high-density LED drivers where ambient temperatures reach 70°C. Derating curves confirm usable current capacity down to 3.5 A at 125°C junction temperature.
Does the SK54C R6 meet RoHS and halogen-free compliance standards?
Yes, the SK54C R6 is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21, as explicitly stated in the "Features" section of the TSC datasheet. The molding compound is UL 94V-0 rated, and terminals are matte tin-plated to ensure solderability and environmental safety across global manufacturing sites.
What is the forward voltage drop of the SK54C R6 at 5 A and 100°C junction temperature?
The SK54C R6 exhibits a forward voltage drop of ≤0.62 V at 5 A and 100°C junction temperature, extrapolated from the typical forward characteristics curve (Fig.4) and confirmed by electrical specifications showing VF increase with temperature. This value remains within design margins for 12 V output rails with ≤3% regulation loss at full load.
Is the SK54C R6 suitable for use in USB Power Delivery (PD) 3.0 applications?
Yes, the SK54C R6 is suitable for USB PD 3.0 applications, particularly in 20 V PPS output stages. Its 40 V VRRM, 0.55 V VF at 5 A, and 120 A IFSM support dynamic voltage transitions and burst-mode operation. The DO-214AB package ensures compatibility with high-density layouts required for compact PD chargers.
What is the moisture sensitivity level (MSL) of the SK54C R6, and does it require baking before reflow?
The SK54C R6 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This is confirmed in the "Features" section of the TSC datasheet and simplifies SMT line integration for high-volume manufacturers using standard lead-free reflow profiles.
SK54C R6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK54C R6 FAQ
1.How can I place an order for SK54C R6 through Aetrix?
Please submit a Request for Quotation (RFQ) for SK54C R6 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 SK54C R6 reliable?
The price and inventory of SK54C R6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK54C R6 is usually 5 days.
3.What payment methods are accepted for SK54C R6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK54C R6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK54C R6?
SK54C R6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK54C R6 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 SK54C R6?
For technical support, including SK54C R6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK54C R6 requirements.
6.How does Aetrix verify that SK54C R6 is sourced from the original manufacturer or authorized distributors?
All SK54C R6 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 SK54C R6 meets industry standards.
7.What is the process for return or replacement of SK54C R6?
All SK54C R6 units undergo pre-shipment inspection (PSI). If there is an issue with SK54C R6, 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 SK54C R6 part is unused and in its original packaging.
Return procedure for SK54C R6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SK54C R6 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…
