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

Taiwan Semiconductor Corporation SS12H

Name: SS12H
Brand: Taiwan Semiconductor Corporation
SKU: SS12H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS12H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SS12H.pdf

Description:: DIODE SCHOTTKY 20V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:7,918

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Product details

Overview

SS12H from Taiwan Semiconductor is a 1 A, 20 V repetitive peak reverse voltage Schottky barrier surface-mount rectifier in DO-214AC (SMA) package, featuring 0.50 V forward voltage at 1 A and 25°C, 40 A non-repetitive surge current, and AEC-Q101 qualification for automotive-grade reliability. It serves as a low-loss freewheeling or reverse-battery protection diode in compact DC/DC converters.

For engineers reviewing the SS12H datasheet, SS12H pinout, SS12H application, or SS12H equivalent, key selection criteria include its 20 V V_RRM, 0.50 V V_F @ 1 A / 25°C, 40 A I_FSM, -55°C to +125°C operating junction temperature, and DO-214AC mechanical compatibility with automated SMT assembly.

Technical Context

The SS12H is a single-die Schottky rectifier optimized for low forward voltage drop and fast switching in low-voltage, high-frequency power conversion. Its guard ring structure provides overvoltage protection, and its JESD201 Class 2 whisker resistance supports long-term solder joint integrity.

Thermally, it delivers R_θJL = 28°C/W and R_θJA = 88°C/W, enabling reliable operation up to 125°C junction temperature under 1 A DC load. Moisture sensitivity level is rated J-STD-020 Level 1, eliminating bake requirements prior to reflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for reverse-bias blocking in 12 V automotive or 5–12 V DC/DC systems.
I_F	1 A - Continuous forward current rating; defines steady-state conduction capability without derating at T_A ≤ 75°C.
V_F @ 1 A, 25°C	0.50 V - Low conduction loss enabling >92% efficiency in 5 V output buck converters at full load.
I_FSM	40 A - Peak surge current handling for 8.3 ms half-sine; supports transient load dump or inrush events in automotive lighting circuits.
T_J max	125°C - Maximum junction temperature; allows operation in engine bay or enclosed industrial enclosures without active cooling.
dV/dt	10,000 V/µs - Critical rate of rise immunity; prevents false turn-on during fast-switching MOSFET gate drive transitions.

Pinout & Package

Package: DO-214AC (SMA), surface-mount plastic case with matte tin-plated leads, cathode indicated by band, weight ≈ 0.060 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter or battery negative in reverse protection).
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to higher-potential rail (e.g., input supply or load side); blocks reverse current above 20 V.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD; suitable for under-hood and infotainment power rails.
Guard ring structure	Enhances edge termination robustness against voltage transients and localized field crowding, improving long-term reliability in noisy 12 V systems.
Moisture sensitivity level 1	Zero floor life limitation; can be stored indefinitely at ambient conditions and placed directly into reflow without pre-baking.
RoHS & halogen-free	Complies with EU RoHS Directive 2011/65/EU and JEDEC JS709C; eliminates brominated flame retardants and chlorine-based compounds.

Applications

Automotive Reverse Battery Protection	Low-Voltage DC/DC Converter Output Rectification
Use Scenario: Prevents damage to vehicle ECUs when battery terminals are accidentally reversed during jump-start or service. IC Role / Device Role / Timing Role: Unidirectional blocking element placed in series with main power input; conducts only during correct polarity. Use Value: Withstands 20 V reverse bias and 40 A surge, ensuring survival of 12 V system load dumps while adding <0.5 V dropout at 1 A.	Use Scenario: Rectifies switched output in synchronous or asynchronous buck converters powering FPGA core rails or microcontroller I/O banks. IC Role / Device Role / Timing Role: Freewheeling path for inductor current during high-side FET off-time; enables continuous current flow. Use Value: 0.50 V V_F minimizes conduction loss, supporting >90% efficiency at 1 A in 3.3 V or 5 V outputs with minimal thermal rise.
LED Driver Freewheeling Diode	Low-Frequency Inverter Auxiliary Rectification
Use Scenario: Provides current recirculation path in constant-current LED drivers using buck or boost topologies for automotive lighting. IC Role / Device Role / Timing Role: Clamps inductive kickback and sustains LED current during PWM dimming intervals. Use Value: Fast recovery and low V_F reduce thermal stress on LEDs and driver ICs; AEC-Q101 rating ensures compliance in headlamp modules.	Use Scenario: Rectifies auxiliary AC signals in low-frequency (<1 kHz) inverters used in HVAC blower control or industrial motor drives. IC Role / Device Role / Timing Role: Converts transformer-coupled AC to DC for gate drive or auxiliary bias supplies. Use Value: 125°C T_J max and 40 A I_FSM support intermittent overload conditions typical in motor startup waveforms.

Automotive Reverse Battery Protection

Low-Voltage DC/DC Converter Output Rectification

Use Scenario: Prevents damage to vehicle ECUs when battery terminals are accidentally reversed during jump-start or service.

IC Role / Device Role / Timing Role: Unidirectional blocking element placed in series with main power input; conducts only during correct polarity.

Use Value: Withstands 20 V reverse bias and 40 A surge, ensuring survival of 12 V system load dumps while adding <0.5 V dropout at 1 A.

Use Scenario: Rectifies switched output in synchronous or asynchronous buck converters powering FPGA core rails or microcontroller I/O banks.

IC Role / Device Role / Timing Role: Freewheeling path for inductor current during high-side FET off-time; enables continuous current flow.

Use Value: 0.50 V V_F minimizes conduction loss, supporting >90% efficiency at 1 A in 3.3 V or 5 V outputs with minimal thermal rise.

LED Driver Freewheeling Diode

Low-Frequency Inverter Auxiliary Rectification

Use Scenario: Provides current recirculation path in constant-current LED drivers using buck or boost topologies for automotive lighting.

IC Role / Device Role / Timing Role: Clamps inductive kickback and sustains LED current during PWM dimming intervals.

Use Value: Fast recovery and low V_F reduce thermal stress on LEDs and driver ICs; AEC-Q101 rating ensures compliance in headlamp modules.

Use Scenario: Rectifies auxiliary AC signals in low-frequency (<1 kHz) inverters used in HVAC blower control or industrial motor drives.

IC Role / Device Role / Timing Role: Converts transformer-coupled AC to DC for gate drive or auxiliary bias supplies.

Use Value: 125°C T_J max and 40 A I_FSM support intermittent overload conditions typical in motor startup waveforms.

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-1EQH02-M3/5AT	Same DO-214AC package, 20 V V_RRM, but 0.45 V V_F @ 1 A and 150°C T_J max; no AEC-Q101 claim.	Lower V_F improves efficiency marginally, but lacks automotive qualification documentation.	Preferred where ultra-low loss outweighs automotive compliance; verify qualification status per application safety requirements.
ON Semiconductor SB120-E3/54	DO-214AC, 20 V V_RRM, 1 A I_F, 0.52 V V_F @ 1 A, 125°C T_J; AEC-Q101 qualified per datasheet Rev. 3.	Identical voltage/current ratings and qualification; slightly higher V_F increases conduction loss by ~4 mW at 1 A.	Drop-in alternative with same footprint and qualification; select when Taiwan Semiconductor supply constraints exist.

Compared with VS-1EQH02-M3/5AT and SB120-E3/54, the SS12H offers balanced performance: AEC-Q101 validation plus 0.50 V V_F and 125°C operation-making it optimal for cost-sensitive, thermally constrained automotive subsystems requiring documented reliability.

Availability

SS12H is available at Aetrix Electronics and suitable for automotive reverse battery protection, low-voltage DC/DC converter output rectification, and LED driver freewheeling applications requiring stable component supply across production lifecycles.

Supply support for SS12H 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 Company (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete semiconductors, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101-compliant product lines.

The SS12H belongs to TSC's SS1xH Schottky rectifier family, engineered specifically for high-efficiency, space-constrained automotive and industrial power conversion where low V_F, surge robustness, and qualification assurance are critical.

FAQ

What is the maximum junction temperature rating for the SS12H?

The SS12H has a maximum junction temperature (T_J) rating of +125°C, verified per absolute maximum ratings in the official datasheet. This allows continuous operation in environments such as automotive cabin modules or enclosed industrial power supplies without forced cooling. The SS12H must not exceed this limit under any steady-state or transient condition to ensure long-term reliability and parametric stability.

Is the SS12H suitable for reverse battery protection in 12 V automotive systems?

Yes, the SS12H is explicitly designed for reverse battery protection in 12 V automotive systems. Its 20 V V_RRM, AEC-Q101 qualification, 40 A I_FSM, and guard ring structure provide robust blocking and surge handling during jump-start faults. The 0.50 V forward voltage ensures minimal voltage drop and heat generation when installed in series with the battery feed.

Does the SS12H have a defined moisture sensitivity level (MSL)?

Yes, the SS12H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to surface-mount reflow. This simplifies manufacturing logistics and eliminates yield risk from moisture-induced popcorning during lead-free reflow profiles.

What is the forward voltage of the SS12H at elevated temperature?

At 1 A and 100°C junction temperature, the SS12H exhibits a typical forward voltage of 0.40 V-lower than its 0.50 V value at 25°C due to the negative temperature coefficient of Schottky diodes. This behavior improves thermal stability in high-ambient applications, reducing power dissipation as temperature rises.

Which package does the SS12H use, and is it compatible with standard SMA footprints?

The SS12H uses the DO-214AC (SMA) package, fully compliant with JEDEC outline standards. Its dimensions-including 4.60 mm body length, 2.83 mm width, and 2.30 mm height-match industry-standard SMA land patterns. The cathode band and matte tin-plated leads ensure compatibility with automated placement and IPC-A-610 Class 2/3 soldering processes.

SS12H Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 500 mV @ 1 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 20 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

Operating Temperature - Junction:: -55°C ~ 125°C

SS12H FAQ

1.How can I place an order for SS12H through Aetrix?

Please submit a Request for Quotation (RFQ) for SS12H 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 SS12H reliable?

The price and inventory of SS12H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS12H is usually 5 days.

3.What payment methods are accepted for SS12H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS12H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS12H?

SS12H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS12H 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 SS12H?

For technical support, including SS12H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS12H requirements.

6.How does Aetrix verify that SS12H is sourced from the original manufacturer or authorized distributors?

All SS12H 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 SS12H meets industry standards.

7.What is the process for return or replacement of SS12H?

All SS12H units undergo pre-shipment inspection (PSI). If there is an issue with SS12H, 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 SS12H part is unused and in its original packaging.

Return procedure for SS12H:

1.Submit a request within 90 days.

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

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