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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SS15L

Name: SS15L
Brand: Taiwan Semiconductor Corporation
SKU: SS15L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS15L

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-219AB

Datasheet:: SS15L.pdf

Description:: DIODE SCHOTTKY 50V 1A SUB SMA

Quantity:: RFQ Add To RFQ list

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Inventory:9,494

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Product details

Overview

SS15L from Taiwan Semiconductor is a 1 A, 50 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.580 V forward voltage at 0.5 A and 25°C, 30 A peak surge current, and 125°C maximum junction temperature. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters.

For engineers reviewing the SS15L datasheet, SS15L pinout, SS15L application, or SS15L equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, low VF for reduced conduction loss, Sub SMA thermal performance (R_θJL = 45°C/W), and suitability for automated SMT assembly in space-constrained power supplies.

Technical Context

The SS15L operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity marking and JESD201 Class 2 whisker-resistant matte tin plating. Its 50 V V_RRM and 0.700 V V_F at 1.0 A/25°C define conduction behavior under full-rated DC load.

Thermally, it delivers R_θJA = 100°C/W and R_θJL = 45°C/W, enabling reliable operation up to 125°C junction temperature with appropriate PCB copper area. The device meets J-STD-020 Level 1 moisture sensitivity and UL 94V-0 flammability requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum non-repetitive reverse blocking voltage; sets upper limit for DC bus or output rail voltage in SMPS designs
I_F	1 A continuous - Rated average forward current; defines steady-state power delivery capability without derating
V_F @ 0.5 A	0.580 V - Forward voltage drop at half-rated current; directly determines conduction loss (0.29 W) in low-V_OUT converters
I_FSM	30 A - Peak non-repetitive surge current (8.3 ms sine); supports inrush and transient overload handling
T_J max	125°C - Maximum junction temperature; constrains thermal design margin when mounted on standard FR-4 with 1-in² copper
R_θJL	45°C/W - Junction-to-lead thermal resistance; enables direct heat transfer to PCB pad or heatsink via cathode lead

Pinout & Package

Package: Sub SMA - Surface-mount plastic package with molded body meeting UL 94V-0, matte tin-plated leads, and cathode band polarity indicator. Weight: 0.019 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input current terminal	Connected to higher-potential node (e.g., transformer secondary or switch node); accepts forward current flow into device
Cathode	Output current terminal	Connected to lower-potential node (e.g., output capacitor or ground); marked by visible band; primary heat path to PCB

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against transient overvoltage events without requiring external snubbers in flyback or buck-derived topologies
Low V_F at 1.0 A	0.700 V ensures <0.7 W conduction loss at full rated current, improving efficiency in 3.3–12 V output stages
J-STD-020 Level 1 MSL	Enables unlimited floor life and reflow compatibility without baking-critical for high-throughput SMT lines
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives, supporting environmentally regulated industrial and consumer shipments

Applications

AC-DC Adapter Output Rectification	USB-C PD Secondary Side
Use Scenario: 5–20 V, 1–3 A output stage of compact wall adapters powering laptops and monitors. IC Role / Device Role / Timing Role: Primary unidirectional power conversion element replacing slower PN diodes to minimize conduction loss and improve light-load efficiency. Use Value: 0.580 V V_F at 0.5 A reduces rectifier loss by ~40% vs. comparable 1 A fast recovery diodes, directly extending adapter energy efficiency compliance margins.	Use Scenario: 9/15/20 V output rail in USB-C Power Delivery sink designs with tight thermal envelopes. IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or quasi-resonant flyback converters operating up to 100 kHz. Use Value: Sub SMA footprint and 45°C/W R_θJL allow direct thermal coupling to ground plane, maintaining T_J < 110°C at 1 A continuous without heatsinks.
Industrial DC-DC Converter	LED Driver Secondary Rectification
Use Scenario: 5–48 V isolated DC-DC modules for PLC I/O and sensor interfaces requiring >10-year field reliability. IC Role / Device Role / Timing Role: High-surge-capable (30 A I_FSM) output rectifier handling input transients and hot-swap events. Use Value: Guard ring protection and 125°C T_J rating ensure stable operation during 200 V/1 µs line surges per IEC 61000-4-5, reducing field failure rates.	Use Scenario: Constant-current LED driver output stage delivering 350 mA–1 A to strings of 3–10 white LEDs. IC Role / Device Role / Timing Role: Low-noise, low-V_F rectifier minimizing ripple-induced flicker and thermal drift in analog dimming circuits. Use Value: 400 µA max reverse leakage at 25°C prevents standby current degradation in always-on lighting controls, preserving battery or energy-harvesting runtime.

AC-DC Adapter Output Rectification

USB-C PD Secondary Side

Use Scenario: 5–20 V, 1–3 A output stage of compact wall adapters powering laptops and monitors.

IC Role / Device Role / Timing Role: Primary unidirectional power conversion element replacing slower PN diodes to minimize conduction loss and improve light-load efficiency.

Use Value: 0.580 V V_F at 0.5 A reduces rectifier loss by ~40% vs. comparable 1 A fast recovery diodes, directly extending adapter energy efficiency compliance margins.

Use Scenario: 9/15/20 V output rail in USB-C Power Delivery sink designs with tight thermal envelopes.

IC Role / Device Role / Timing Role: Output freewheeling rectifier in synchronous or quasi-resonant flyback converters operating up to 100 kHz.

Use Value: Sub SMA footprint and 45°C/W R_θJL allow direct thermal coupling to ground plane, maintaining T_J < 110°C at 1 A continuous without heatsinks.

Industrial DC-DC Converter

LED Driver Secondary Rectification

Use Scenario: 5–48 V isolated DC-DC modules for PLC I/O and sensor interfaces requiring >10-year field reliability.

IC Role / Device Role / Timing Role: High-surge-capable (30 A I_FSM) output rectifier handling input transients and hot-swap events.

Use Value: Guard ring protection and 125°C T_J rating ensure stable operation during 200 V/1 µs line surges per IEC 61000-4-5, reducing field failure rates.

Use Scenario: Constant-current LED driver output stage delivering 350 mA–1 A to strings of 3–10 white LEDs.

IC Role / Device Role / Timing Role: Low-noise, low-V_F rectifier minimizing ripple-induced flicker and thermal drift in analog dimming circuits.

Use Value: 400 µA max reverse leakage at 25°C prevents standby current degradation in always-on lighting controls, preserving battery or energy-harvesting runtime.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS15 (ON Semiconductor)	V_RRM = 50 V, V_F = 0.55 V @ 0.5 A, R_θJA = 110°C/W, SMA package (larger than Sub SMA)	Slightly lower V_F but higher thermal resistance; requires larger pad area for same T_J	Preferred where legacy SMA footprint compatibility is required and board space allows
SB150 (Vishay)	V_RRM = 50 V, V_F = 0.57 V @ 0.5 A, I_FSM = 25 A, Sub SMA, MSL Level 1	5 A lower surge rating; otherwise identical thermal and electrical envelope	Valid alternative when system-level surge testing confirms 25 A I_FSM suffices

Compared with SS15L, SS15 offers marginally better conduction loss but demands more PCB area and dissipates more heat at full load; SB150 matches footprint and process but trades 5 A surge headroom for equivalent thermal and leakage performance.

Availability

SS15L is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and DC-DC converters requiring stable component supply, consistent parametric performance across production lots, and long-term obsolescence management.

Supply support for SS15L 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.

The SS1xL series was designed specifically for high-volume, cost-sensitive power conversion applications demanding low VF, robust surge capability, and seamless SMT integration-targeting adapter, charger, and industrial DC-DC markets.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for SS15L?

The SS15L has a V_RRM of 50 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor SS12L–SS115L datasheet (Version Q2103). This value defines the highest reverse voltage the SS15L can block continuously without breakdown under normal operating conditions and must not be exceeded in circuit design.

What is the forward voltage (V_F) of SS15L at 1.0 A and 25°C?

The SS15L exhibits a maximum forward voltage of 0.700 V at 1.0 A and 25°C, per the Electrical Specifications table in the Taiwan Semiconductor datasheet. This parameter is critical for calculating conduction losses in power supply output stages and directly impacts overall converter efficiency at full load.

Does SS15L have a specified junction-to-ambient thermal resistance (R_θJA)?

Yes, the SS15L has a specified R_θJA of 100°C/W, documented in the Thermal Performance section of the official datasheet. This value assumes standard JEDEC test conditions (single-layer 1-in² copper pad on FR-4) and is used to estimate junction temperature rise above ambient under given power dissipation.

Is SS15L compliant with RoHS and halogen-free standards?

Yes, SS15L is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor SS12L–SS115L datasheet. These compliance statements apply directly to the SS15L variant and are verified through material declarations and third-party testing.

What is the moisture sensitivity level (MSL) rating for SS15L?

The SS15L is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow soldering without prior baking. This rating is confirmed in the FEATURES section and simplifies manufacturing logistics for high-volume SMT assembly lines.

SS15L Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-219AB

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 700 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 400 µA @ 50 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Sub SMA

Operating Temperature - Junction:: -55°C ~ 150°C

SS15L FAQ

1.How can I place an order for SS15L through Aetrix?

Please submit a Request for Quotation (RFQ) for SS15L 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 SS15L reliable?

The price and inventory of SS15L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS15L is usually 5 days.

3.What payment methods are accepted for SS15L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS15L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS15L?

SS15L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS15L 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 SS15L?

For technical support, including SS15L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS15L requirements.

6.How does Aetrix verify that SS15L is sourced from the original manufacturer or authorized distributors?

All SS15L 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 SS15L meets industry standards.

7.What is the process for return or replacement of SS15L?

All SS15L units undergo pre-shipment inspection (PSI). If there is an issue with SS15L, 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 SS15L part is unused and in its original packaging.

Return procedure for SS15L:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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