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Taiwan Semiconductor Corporation SS315FSH
- Part No.:
- SS315FSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
SS315FSH.pdf
- Description:
- 3A, 150V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:9,350
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Product details
Overview
SS315FSH from Taiwan Semiconductor is a 3A, 150V Schottky barrier surface-mount rectifier in SOD-128 package, optimized for high-efficiency DC/DC conversion with low forward voltage (0.82 V at 3.0 A, 25°C), high surge capability (70 A IFSM), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SS315FSH datasheet, SS315FSH pinout, SS315FSH application, or SS315FSH equivalent, key selection criteria include its 150 V reverse voltage rating, junction-to-lead thermal resistance of 16 °C/W, 69 pF capacitance at 1 MHz/4 V, moisture sensitivity level 1 compliance, and suitability for space-constrained, thermally demanding power stages.
Technical Context
The SS315FSH implements a single-die Schottky junction structure enabling fast switching with negligible reverse recovery charge, making it ideal for high-frequency SMPS topologies. Its 150 V VRRM rating supports input stages in 48 V industrial systems and secondary-side rectification in isolated flyback and forward converters.
Thermal performance is defined by RθJL = 16 °C/W and RθJA = 71 °C/W on a 5 mm × 5 mm Cu pad, allowing sustained 3 A conduction up to 125°C junction temperature. The device's low VF drift across temperature (0.68 V at 3.0 A, 125°C) ensures stable efficiency over operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 150 V - Supports 48 V input bus designs with 3× safety margin against transients |
| IF | 3 A continuous - Rated for steady-state output current in compact DC/DC modules |
| VF @ 3.0 A, 25°C | 0.82 V max - Minimizes conduction loss; enables >92% efficiency in 12 V → 5 V buck converters |
| IR @ 150 V, 125°C | 1 mA max - Low leakage preserves regulation in high-temp automotive environments |
| CJ @ 1 MHz, 4 V | 69 pF - Limits switching node ringing in >500 kHz converters |
| RθJL | 16 °C/W - Enables direct thermal coupling to PCB copper for passive cooling |
| IFSM (8.3 ms) | 70 A - Withstands inrush and fault currents without bond-wire failure |
Pinout & Package
Package: SOD-128 - Surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated compound, cathode indicated by band, weight 0.028 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential side (e.g., switch node in synchronous rectifier configuration) |
| Cathode | Current exit point under forward bias; marked by band | Connected to output rail or higher-potential node; defines polarity during layout and assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements (HTOL, TC, HAST, etc.) |
| Moisture sensitivity level 1 | No floor life limitation; safe for standard SMT reflow without baking |
| Halogen-free construction | Complies with IEC 61249-2-21; eliminates corrosive off-gassing during soldering and operation |
| Junction-to-lead thermal resistance | 16 °C/W - Enables efficient heat transfer to PCB copper, reducing need for heatsinks |
| High surge current capability | 70 A peak (8.3 ms) - Survives cold-start surges and short-circuit events in DC/DC controllers |
Applications
| On-board DC/DC Converter | Automotive Lighting Driver |
|---|---|
Use Scenario: Point-of-load regulation in ADAS domain controllers requiring compact, high-reliability 12 V → 3.3 V conversion. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacing MOSFETs in buck-derived topologies. Use Value: Eliminates gate drive complexity while maintaining <0.85 V forward drop at full load, reducing thermal footprint by 30% vs. silicon diodes. | Use Scenario: LED string current regulation in headlamp modules with PWM dimming and EMI-sensitive CAN bus proximity. IC Role / Device Role / Timing Role: Freewheeling path in boost-based constant-current drivers. Use Value: 69 pF junction capacitance minimizes high-frequency noise injection into adjacent CAN/LIN lines, meeting CISPR 25 Class 5 limits. |
| Industrial SMPS Adapter | 48 V Telecom Power Supply |
Use Scenario: Universal-input AC/DC adapter delivering 24 V/3 A for factory automation sensors and PLC I/O modules. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback secondary stage. Use Value: 150 V VRRM provides 2.5× margin over reflected 60 V spike, eliminating need for snubber networks and saving board area. | Use Scenario: Intermediate bus converter (48 V → 12 V) in distributed telecom power architecture. IC Role / Device Role / Timing Role: Input-side clamp diode in active clamp forward topology. Use Value: 70 A IFSM withstands 50 ms overload conditions per GR-1089-CORE, supporting N+1 redundancy without derating. |
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-3EWH015-M3/45 | Same 150 V VRRM, 3 A IF, but TO-277A package (larger footprint, higher RθJA = 90 °C/W) | Less suitable for ultra-thin PCBs; requires larger thermal pad | Prefer when legacy TO-277A footprint compatibility is required over space savings |
| ON Semiconductor SB3150 | 150 V VRRM, 3 A IF, SOD-128 package, but VF = 0.87 V (max) at 3 A - 60 mV higher than SS315FSH | Lower efficiency in thermally constrained 125°C ambient environments | Acceptable where 5–10 mW extra conduction loss is tolerable for supply chain diversification |
Compared with VS-3EWH015-M3/45 and SB3150, the SS315FSH delivers superior thermal performance (RθJL = 16 °C/W) and lowest VF in SOD-128, making it optimal for high-density, high-temperature automotive and industrial DC/DC designs where board area and thermal headroom are critical.
Availability
SS315FSH is available at Aetrix Electronics and suitable for on-board DC/DC converters, automotive lighting drivers, and industrial SMPS adapters requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle support.
Supply support for SS315FSH 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 automotive-qualified components.
The SS3xFSH series was developed specifically for high-reliability, high-efficiency rectification in automotive and industrial power supplies, emphasizing low VF, robust surge handling, and zero-bake SMT manufacturability.
FAQ
What is the maximum junction temperature rating for SS315FSH?
The SS315FSH has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official datasheet. This allows continuous operation in under-hood automotive environments and sealed industrial enclosures. Derating begins above 25°C ambient, with full 3 A current supported up to 115°C ambient when mounted on a 5 mm × 5 mm Cu pad. The SS315FSH must not be operated beyond this limit to ensure reliability and AEC-Q101 qualification integrity.
Is SS315FSH compatible with lead-free reflow profiles?
Yes, the SS315FSH is fully compatible with standard IPC/JEDEC J-STD-020 lead-free reflow profiles (peak 260°C, 20–40 s). Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level 1 classification means no pre-baking is required before SMT assembly - simplifying manufacturing and reducing process risk. The SS315FSH maintains mechanical and electrical integrity throughout JEDEC-defined thermal cycling and steam exposure tests.
Does SS315FSH have a specified reverse recovery time (trr)?
No, the SS315FSH does not specify reverse recovery time because it is a Schottky barrier rectifier - a majority-carrier device with no minority-carrier storage delay. Instead, its switching behavior is characterized by junction capacitance (69 pF at 1 MHz, 4 V) and low forward voltage. This absence of trr eliminates switching losses and EMI associated with recovery spikes, a key advantage over PN-junction rectifiers. The SS315FSH leverages this intrinsic property in high-frequency SMPS designs.
What marking code appears on the SS315FSH device body?
The SS315FSH is laser-marked with "315FSH" on the cathode end of the SOD-128 package, per the ordering information table in the datasheet. This 5-character code uniquely identifies the 150 V variant within the SS3xFSH family and distinguishes it from SS34FSH (40 V), SS36FSH (60 V), SS310FSH (100 V), and SS320FSH (200 V). The SS315FSH marking is consistent across all production lots and aligns with Taiwan Semiconductor's standardized SOD-128 marking convention.
How does SS315FSH compare to SS320FSH in terms of forward voltage and leakage?
At 3.0 A and 25°C, the SS315FSH has a typical VF of 0.76 V and max VF of 0.82 V, while the SS320FSH is rated at 0.85 V max - a 30 mV penalty for the higher 200 V rating. Reverse leakage at 150 V and 125°C is 1 mA for SS315FSH versus 1 mA at 200 V for SS320FSH, confirming tighter IR control at its rated voltage. The SS315FSH thus offers better efficiency in 12–48 V systems where 150 V margin is sufficient, making it the preferred choice over SS320FSH unless 200 V standoff is strictly required.
SS315FSH 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):
- 150 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 150 V
- Capacitance @ Vr, F:
- 54pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS315FSH FAQ
1.How can I place an order for SS315FSH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS315FSH 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 SS315FSH reliable?
The price and inventory of SS315FSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS315FSH is usually 5 days.
3.What payment methods are accepted for SS315FSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS315FSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS315FSH?
SS315FSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS315FSH 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 SS315FSH?
For technical support, including SS315FSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS315FSH requirements.
6.How does Aetrix verify that SS315FSH is sourced from the original manufacturer or authorized distributors?
All SS315FSH 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 SS315FSH meets industry standards.
7.What is the process for return or replacement of SS315FSH?
All SS315FSH units undergo pre-shipment inspection (PSI). If there is an issue with SS315FSH, 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 SS315FSH part is unused and in its original packaging.
Return procedure for SS315FSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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