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Taiwan Semiconductor Corporation SS14FSH
- Part No.:
- SS14FSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
SS14FSH.pdf
- Description:
- 1A, 40V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
SS14FSH from Taiwan Semiconductor is a 1A, 40V Schottky barrier surface-mount rectifier in SOD-128 package, featuring low forward voltage (0.44 V at 1.0 A, 25°C), high surge capability (30 A IFSM), AEC-Q101 qualification, and junction temperature up to 150°C - used in automotive-grade DC/DC converters and compact AC/DC adapters.
For engineers reviewing the SS14FSH datasheet, SS14FSH pinout, SS14FSH application, or SS14FSH equivalent, key selection criteria include its 40 V VRRM rating, 0.44 V forward drop at rated current, thermal resistance (RθJL = 20°C/W), moisture sensitivity level 1 compliance, and suitability for high-efficiency, space-constrained power conversion stages.
Technical Context
The SS14FSH implements a single-die Schottky junction optimized for low conduction loss in low-voltage switching applications. Its 40 V reverse blocking rating and 1 A continuous forward current support operation in buck-derived topologies with fast transient response and minimal thermal derating below 125°C ambient.
Thermal performance is defined by RθJL = 20°C/W and RθJA = 75°C/W on a 5 mm × 5 mm copper pad, enabling reliable operation without heatsinking in board-level power rails. The device's cathode-band polarity marking and matte tin-plated leads ensure compatibility with automated reflow assembly per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for input-side clamping in 12–24 V DC/DC stages |
| IF | 1 A - Continuous forward current rating; defines steady-state power delivery capacity without thermal runaway |
| VF @ 1.0 A, 25°C | 0.44 V - Low conduction loss reduces power dissipation to ~440 mW, easing thermal management |
| IFSM (8.3 ms) | 30 A - Peak surge current handling enables robustness against line transients and startup inrush |
| TJ max | +150°C - Extended junction temperature range supports under-hood automotive environments |
| RθJL | 20°C/W - Low junction-to-lead thermal resistance allows efficient heat transfer to PCB copper |
| IR @ 40 V, 25°C | ≤100 µA - Low leakage preserves efficiency in standby and light-load conditions |
Pinout & Package
Package: SOD-128 - Surface-mount, flat lead, single-anode/single-cathode configuration with cathode band marking; dimensions per Taiwan Semiconductor outline drawing; UL 94V-0 molding compound; weight ≈ 0.028 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to source-side of switching node; must be routed with low-inductance trace in high-frequency SMPS |
| Cathode | Output current exit point | Connected to output rail or inductor; polarity marked by visible band; solderable per J-STD-002 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body electronics, and infotainment power supplies |
| Low VF (0.44 V @ 1 A) | Reduces conduction loss by >30% vs. comparable silicon diodes, improving system efficiency in 5–24 V rails |
| Junction capacitance (69 pF) | Minimizes reverse recovery charge, supporting clean switching in 100 kHz–1 MHz DC/DC converters |
| Moisture sensitivity level 1 | Enables direct placement without baking; eliminates pre-reflow dry storage requirements |
| High IFSM (30 A) | Withstands repeated 8.3 ms surges - critical for adapter input rectification and load-dump protection |
Applications
| Automotive On-Board DC/DC Converter | USB-C Power Adapter Secondary Rectification |
|---|---|
Use Scenario: Step-down conversion from 12 V or 48 V battery to 3.3 V/5 V for ADAS sensors and infotainment modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter; conducts during low-side switch off-time. Use Value: 0.44 V VF minimizes power loss at 1 A load, reducing thermal stress in confined ECU enclosures. | Use Scenario: Secondary-side rectification in compact 20–65 W USB PD adapters with planar transformer layout. IC Role / Device Role / Timing Role: Unidirectional current path after high-frequency transformer; replaces slower silicon diodes to improve efficiency. Use Value: 69 pF junction capacitance and fast soft recovery reduce EMI and enable higher switching frequencies without snubbers. |
| LED Driver Constant-Current Stage | Industrial IoT Sensor Node Power Supply |
Use Scenario: Low-voltage, constant-current LED string driver in smart lighting systems with dimming control. IC Role / Device Role / Timing Role: Freewheeling path for inductive current during PWM dimming cycles; handles repetitive 1 A pulses. Use Value: 30 A IFSM withstands peak currents during short-circuit events, enhancing field reliability. | Use Scenario: Primary rectification in ultra-compact 5 V/1 A isolated DC/DC modules powering wireless sensor nodes. IC Role / Device Role / Timing Role: Input bridge or output rectifier in flyback or forward topology; operates continuously at 60–85°C ambient. Use Value: +150°C TJ max and RθJL = 20°C/W allow stable operation on small PCBs without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-1EQH04-M3/45 | Same SOD-128 package, 40 V VRRM, but VF = 0.52 V @ 1 A (25°C); higher RθJA (85°C/W) | Slightly lower efficiency and higher thermal rise in dense layouts | Prefer SS14FSH where <0.45 V VF and <75°C/W RθJA are required for thermal margin |
| ON Semiconductor SB140 | SOD-123 package (smaller footprint), 40 V VRRM, VF = 0.55 V @ 1 A (25°C); IFSM = 25 A | Lower surge rating and less thermal mass; unsuitable for high-transient industrial adapters | SS14FSH preferred when 30 A IFSM and AEC-Q101 qualification are mandatory |
Compared with VS-1EQH04-M3/45 and SB140, the SS14FSH delivers superior forward voltage, lower thermal resistance, and automotive qualification - making it optimal for thermally constrained, high-reliability 40 V rectification where efficiency and surge immunity are prioritized over footprint minimization.
Availability
SS14FSH is available at Aetrix Electronics and suitable for automotive DC/DC converters, USB-C power adapters, and industrial LED drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SS14FSH 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 automotive, industrial, and consumer markets since 1979.
The SS14FSH belongs to TSC's FSH-series Schottky rectifiers - engineered for high-efficiency, surface-mount power conversion in space- and thermal-constrained applications where low VF, AEC-Q101 compliance, and robust surge handling are essential.
FAQ
What is the maximum junction temperature rating for SS14FSH?
The SS14FSH has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version B2103). This rating enables reliable operation in under-hood automotive environments and enclosed industrial power supplies. Thermal design must ensure that actual junction temperature remains below this limit under worst-case load and ambient conditions. The SS14FSH's RθJL of 20°C/W supports effective heat transfer to the PCB when mounted on a 5 mm × 5 mm copper pad.
Is SS14FSH AEC-Q101 qualified?
Yes, SS14FSH is explicitly AEC-Q101 qualified, as confirmed in the "FEATURES" section of the Taiwan Semiconductor datasheet (Version B2103). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for automotive power electronics. The SS14FSH's qualification applies specifically to the SOD-128 packaged device and is not inferred from family-level data.
What is the forward voltage of SS14FSH at 1.0 A and 125°C?
The forward voltage of SS14FSH is 0.37 V (typical) and 0.46 V (maximum) at 1.0 A and 125°C, per the "ELECTRICAL SPECIFICATIONS" table in the Taiwan Semiconductor datasheet (Version B2103). This reduced VF at elevated temperature reflects the inherent negative temperature coefficient of Schottky diodes and supports stable performance in thermally demanding applications such as automotive DC/DC converters. The SS14FSH maintains this specification across its full operating junction temperature range.
Does SS14FSH have a moisture sensitivity level (MSL) rating?
Yes, SS14FSH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, as stated in the "FEATURES" section of the Taiwan Semiconductor datasheet (Version B2103). This means the device can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking. The MSL Level 1 rating applies specifically to the SOD-128 package variant and confirms compatibility with standard automated SMT assembly processes without special handling.
What is the junction capacitance of SS14FSH and how does it affect switching performance?
The junction capacitance (CJ) of SS14FSH is 69 pF at 1 MHz and VR = 4.0 V, per the electrical specifications table in the Taiwan Semiconductor datasheet (Version B2103). This relatively low capacitance minimizes reverse recovery charge (QRR), enabling clean turn-off behavior in high-frequency switching applications such as 500 kHz–1 MHz DC/DC converters. As a result, the SS14FSH reduces switching losses and EMI generation compared to higher-CJ alternatives, especially in compact USB-C adapter designs.
SS14FSH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-128
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- 69pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS14FSH FAQ
1.How can I place an order for SS14FSH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS14FSH 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 SS14FSH reliable?
The price and inventory of SS14FSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS14FSH is usually 5 days.
3.What payment methods are accepted for SS14FSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS14FSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS14FSH?
SS14FSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS14FSH 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 SS14FSH?
For technical support, including SS14FSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS14FSH requirements.
6.How does Aetrix verify that SS14FSH is sourced from the original manufacturer or authorized distributors?
All SS14FSH 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 SS14FSH meets industry standards.
7.What is the process for return or replacement of SS14FSH?
All SS14FSH units undergo pre-shipment inspection (PSI). If there is an issue with SS14FSH, 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 SS14FSH part is unused and in its original packaging.
Return procedure for SS14FSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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