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

Taiwan Semiconductor Corporation SS29L

Name: SS29L
Brand: Taiwan Semiconductor Corporation
SKU: SS29L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS29L

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123

Datasheet:: SS29L.pdf

Description:: 2A, 90V, SCHOTTKY RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:4,111

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Product details

Overview

SS29L from Taiwan Semiconductor is a 2 A, 90 V repetitive peak reverse voltage Schottky barrier rectifier in Sub SMA package, optimized for high-efficiency switching mode power supplies and DC-DC converters with low forward voltage drop (0.85 V at 2 A, 25°C) and low reverse leakage (100 µA at 25°C, 100 V). It features guard ring overvoltage protection, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1.

For engineers reviewing the SS29L datasheet, SS29L pinout, SS29L application, or SS29L equivalent, key selection considerations include its 90 V V_RRM, 50 A I_FSM, 17 °C/W R_θJL, 125–150 °C operating junction range, and compatibility with automated SMT placement in compact power conversion designs.

Technical Context

The SS29L implements a single-die Schottky barrier structure with guard ring termination to enhance ruggedness against transient overvoltage events. Its thermal design supports 2 A continuous forward current with junction-to-lead resistance of 17 °C/W and junction-to-ambient resistance of 75 °C/W under standard PCB mounting conditions.

Electrical behavior is characterized by a typical forward voltage of 0.85 V at 2 A and 25°C, reverse leakage of ≤100 µA at rated 90 V and 25°C, and ≤5 mA at 125°C - enabling stable operation in thermally constrained adapters and industrial DC-DC modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	90 V - maximum non-repetitive reverse blocking capability, suitable for 48 V input SMPS with safety margin
I_F	2 A - continuous forward current rating at T_L = 75°C, defines steady-state power handling
I_FSM	50 A - peak surge current (8.3 ms half-sine), supports cold-start and fault-current robustness
V_F	0.85 V @ 2 A, 25°C - low conduction loss improves efficiency vs. silicon diodes in high-frequency converters
I_R	≤100 µA @ 90 V, 25°C - low leakage preserves standby power budget in energy-sensitive applications
T_J max	150 °C - extended junction temperature enables operation in sealed or high-ambient environments
R_θJL	17 °C/W - low thermal resistance allows effective heat transfer to PCB copper, reducing thermal derating

Pinout & Package

Package: Sub SMA - surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, cathode band polarity marking, and 0.019 g mass.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to lower-potential side (e.g., switch node in buck converter); requires adequate copper pour for thermal management
Cathode	Forward current exit / reverse voltage blocking terminal	Marked by band; connects to output rail or ground return; critical for EMI filtering layout due to fast recovery

Key Features

Feature	Design Value
Guard ring overvoltage protection	Enhances reliability under line transients and inductive kickback without external snubbers
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow, reducing manufacturing cost and cycle time
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental directives for consumer and industrial end equipment
High surge current capability (50 A)	Supports repeated inrush events in AC/DC adapters without degradation
Automated placement compatibility	Sub SMA footprint and lead geometry conform to IPC-7351B, enabling high-yield pick-and-place

Applications

AC/DC Adapters	Industrial DC-DC Converters
Use Scenario: Secondary-side rectification in 12–24 V output wall adapters for IoT gateways and network equipment. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to reduce conduction loss and improve no-load efficiency. Use Value: 0.85 V V_F lowers average power dissipation by ~35% vs. 1.1 V Si diode, extending thermal headroom in enclosed housings.	Use Scenario: Output rectification in isolated 48 V input, 5–12 V output industrial DC-DC modules with 200 kHz–1 MHz switching. IC Role / Device Role / Timing Role: High-speed unidirectional current path with minimal reverse recovery charge, reducing switching losses. Use Value: Low Q_RR and 10,000 V/µs dv/dt rating prevent false triggering in high-di/dt environments near MOSFETs.
Telecom Power Supplies	LED Driver Secondary Rectification
Use Scenario: OR-ing diode and output rectifier in redundant -48 V telecom power shelves. IC Role / Device Role / Timing Role: Forward conduction path with low V_F to minimize voltage drop across paralleled rails. Use Value: 2 A rating and 150 °C T_J max support continuous operation at elevated ambient temperatures common in telecom cabinets.	Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting and signage. IC Role / Device Role / Timing Role: Efficient energy transfer from transformer secondary to LED string, minimizing heat generation near optics. Use Value: 17 °C/W R_θJL enables direct thermal coupling to aluminum PCB, maintaining LED lumen maintenance and lifetime.

AC/DC Adapters

Industrial DC-DC Converters

Use Scenario: Secondary-side rectification in 12–24 V output wall adapters for IoT gateways and network equipment.

IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional PN diodes to reduce conduction loss and improve no-load efficiency.

Use Value: 0.85 V V_F lowers average power dissipation by ~35% vs. 1.1 V Si diode, extending thermal headroom in enclosed housings.

Use Scenario: Output rectification in isolated 48 V input, 5–12 V output industrial DC-DC modules with 200 kHz–1 MHz switching.

IC Role / Device Role / Timing Role: High-speed unidirectional current path with minimal reverse recovery charge, reducing switching losses.

Use Value: Low Q_RR and 10,000 V/µs dv/dt rating prevent false triggering in high-di/dt environments near MOSFETs.

Telecom Power Supplies

LED Driver Secondary Rectification

Use Scenario: OR-ing diode and output rectifier in redundant -48 V telecom power shelves.

IC Role / Device Role / Timing Role: Forward conduction path with low V_F to minimize voltage drop across paralleled rails.

Use Value: 2 A rating and 150 °C T_J max support continuous operation at elevated ambient temperatures common in telecom cabinets.

Use Scenario: Secondary-side rectification in constant-current LED drivers for street lighting and signage.

IC Role / Device Role / Timing Role: Efficient energy transfer from transformer secondary to LED string, minimizing heat generation near optics.

Use Value: 17 °C/W R_θJL enables direct thermal coupling to aluminum PCB, maintaining LED lumen maintenance and lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SS29HE3/5BT (Vishay)	Same V_RRM (90 V), higher I_F (3 A), slightly higher V_F (0.89 V), DO-214AC package	DO-214AC has larger footprint and higher R_θJA; less suitable for ultra-compact layouts	Prefer SS29L where Sub SMA size, 17 °C/W R_θJL, and J-STD-020 Level 1 are required
SB290 (ON Semiconductor)	Same V_RRM (90 V), identical I_F (2 A), but V_F = 0.92 V and I_R = 200 µA @ 25°C	Higher leakage may impact light-load efficiency in battery-backed systems	SS29L offers tighter leakage spec (100 µA) and lower V_F, preferred for high-efficiency adapter designs

Compared with SS29HE3/5BT and SB290, the SS29L delivers superior thermal performance via Sub SMA packaging and best-in-class reverse leakage, making it optimal for space-constrained, thermally demanding 2 A rectification tasks where efficiency and manufacturability are prioritized.

Availability

SS29L is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC-DC converters, and telecom power supplies requiring stable component supply, consistent parametric performance, and full traceability across production lots.

Supply support for SS29L 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 SS22L–SS215L series was developed to deliver high-reliability, low-V_F Schottky rectifiers in standardized Sub SMA packages for cost-sensitive, high-volume power conversion applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the SS29L?

The SS29L has a V_RRM of 90 V, verified per Taiwan Semiconductor's O2103 datasheet revision. This rating defines the highest reverse voltage the device can block repeatedly without breakdown under normal operating conditions. The SS29L is therefore suited for 48 V nominal input systems with appropriate safety margins and transient clamping.

Does the SS29L have a specified forward voltage (V_F) at 2 A and 125°C?

No - the SS29L datasheet specifies V_F = 0.85 V only at 2 A and 25°C. At elevated temperatures, V_F decreases slightly due to Schottky physics, but no typ/max value is published for 125°C. Designers should use the 25°C value with thermal derating curves (Fig.1) to estimate performance at higher junction temperatures.

Is the SS29L RoHS and halogen-free compliant?

Yes - the SS29L meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, as confirmed in the "Features" section of the official Taiwan Semiconductor SS22L–SS215L datasheet (Version O2103). This ensures compliance for export to EU, China, and other regulated markets.

What is the moisture sensitivity level (MSL) of the SS29L, and does it require baking before reflow?

The SS29L has MSL Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions without dry-pack or baking. This eliminates pre-reflow bake steps, simplifying SMT line logistics and reducing process risk for high-mix manufacturing.

How does the SS29L's thermal resistance compare to similar Schottky rectifiers in DO-214AC packages?

The SS29L's R_θJL is 17 °C/W, significantly lower than typical DO-214AC Schottky rectifiers (~25–30 °C/W), due to Sub SMA's optimized leadframe design and shorter thermal path. This enables higher sustained current in thermally limited PCB layouts without additional heatsinking.

SS29L Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 90 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 850 mV @ 2 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 100 µA @ 90 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: Sub SMA

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

SS29L FAQ

1.How can I place an order for SS29L through Aetrix?

Please submit a Request for Quotation (RFQ) for SS29L 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 SS29L reliable?

The price and inventory of SS29L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS29L is usually 5 days.

3.What payment methods are accepted for SS29L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS29L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS29L?

SS29L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS29L 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 SS29L?

For technical support, including SS29L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS29L requirements.

6.How does Aetrix verify that SS29L is sourced from the original manufacturer or authorized distributors?

All SS29L 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 SS29L meets industry standards.

7.What is the process for return or replacement of SS29L?

All SS29L units undergo pre-shipment inspection (PSI). If there is an issue with SS29L, 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 SS29L part is unused and in its original packaging.

Return procedure for SS29L:

1.Submit a request within 90 days.

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

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