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

Taiwan Semiconductor Corporation SSL12H

Name: SSL12H
Brand: Taiwan Semiconductor Corporation
SKU: SSL12H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SSL12H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: SSL12H.pdf

Description:: DIODE SCHOTTKY 20V 1A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:3,126

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Product details

Overview

SSL12H from Taiwan Semiconductor is a 1 A, 20 V repetitive peak reverse voltage Schottky barrier rectifier in DO-214AC (SMA) package, featuring low forward voltage (max 0.39 V at 1 A, 25°C), 50 A surge capability, AEC-Q101 qualification, and guard ring overvoltage protection-used in automotive reverse battery protection and DC/DC converter freewheeling paths.

For engineers reviewing the SSL12H datasheet, SSL12H pinout, SSL12H application, or SSL12H equivalent, key selection criteria include its 20 V V_RRM, 1 A continuous forward current rating, 0.39 V max V_F, AEC-Q101 qualification for automotive use, and DO-214AC mechanical compatibility with standard SMA footprints.

Technical Context

This Schottky rectifier uses a single-die construction optimized for low-loss operation in high-frequency switching applications. Its 28 °C/W junction-to-lead thermal resistance and 88 °C/W junction-to-ambient rating support reliable conduction under sustained 1 A load at up to +125°C junction temperature.

The device implements a guard ring structure to enhance ruggedness against transient overvoltage events, while its J-STD-020 Level 1 moisture sensitivity and matte tin-plated leads ensure compatibility with automated SMT assembly and long-term solderability without baking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased conditions
I_F	1 A - continuous average forward current; sets steady-state power delivery capacity
V_F (max)	0.39 V at 1 A, 25°C - directly determines conduction loss and thermal rise in high-efficiency DC/DC stages
I_FSM	50 A - non-repetitive surge current rating; enables survival during inductive turn-off transients
T_J (max)	+125°C - maximum allowable junction temperature; constrains thermal design margin in enclosed automotive modules
R_θJL	28 °C/W - junction-to-lead thermal resistance; critical for estimating die temperature rise under PCB copper heatsinking
Package	DO-214AC (SMA) - industry-standard surface-mount outline with cathode band polarity marking and 0.066 g mass

Pinout & Package

DO-214AC (SMA) package with axial lead configuration: anode and cathode terminals formed by the two leads; polarity indicated by molded cathode band on body.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); must handle full 1 A DC + ripple
Cathode	Forward current exit / reverse-blocking terminal	Connected to higher-potential rail (e.g., output capacitor positive); marked by visible band; blocks up to 20 V reverse

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood environments including temperature cycling, humidity bias, and mechanical shock per stress test requirements
Guard ring structure	Enhances edge termination robustness to prevent premature avalanche breakdown during voltage transients
Low V_F (0.39 V max)	Reduces forward conduction loss by >40% vs. comparable silicon diodes, improving efficiency in 12 V automotive systems
J-STD-020 Level 1 MSL	Enables direct placement without pre-baking, reducing manufacturing complexity and cost in high-volume SMT lines
Halogen-free & RoHS compliant	Meets EU environmental directives and OEM material declarations for end-of-life recyclability and regulatory compliance

Applications

Reverse Battery Protection	DC/DC Converter Freewheeling
Use Scenario: Installed between vehicle battery and ECU input to block reverse polarity connection during service or jump-start errors. IC Role / Device Role / Timing Role: Unidirectional current valve preventing destructive reverse current flow into downstream circuitry. Use Value: Withstands 20 V reverse bias continuously and clamps fault energy via low-loss conduction path before fuse interruption.	Use Scenario: Placed across synchronous rectifier or high-side switch in buck converters powering infotainment or ADAS modules. IC Role / Device Role / Timing Role: Provides low-V_F path for inductor current decay during switch off-time. Use Value: 0.39 V max V_F minimizes power loss and thermal stress during high-frequency (≥200 kHz) switching cycles.
Automotive LED Lighting	Low-Voltage Inverter Output Stage
Use Scenario: Used in constant-current LED driver outputs for headlamps or DRLs where reverse voltage from load dump or inductive kick must be blocked. IC Role / Device Role / Timing Role: Polarity protection diode placed at driver output to prevent backfeed into control IC during fault conditions. Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient, matching LED thermal envelope requirements.	Use Scenario: Employed in half-bridge inverter outputs for small BLDC fans or HVAC actuators operating from 12 V battery rails. IC Role / Device Role / Timing Role: Freewheeling element absorbing reactive energy from motor windings during PWM dead-time intervals. Use Value: 50 A I_FSM rating handles short-duration motor stall currents without degradation or thermal runaway.

Reverse Battery Protection

DC/DC Converter Freewheeling

Use Scenario: Installed between vehicle battery and ECU input to block reverse polarity connection during service or jump-start errors.

IC Role / Device Role / Timing Role: Unidirectional current valve preventing destructive reverse current flow into downstream circuitry.

Use Value: Withstands 20 V reverse bias continuously and clamps fault energy via low-loss conduction path before fuse interruption.

Use Scenario: Placed across synchronous rectifier or high-side switch in buck converters powering infotainment or ADAS modules.

IC Role / Device Role / Timing Role: Provides low-V_F path for inductor current decay during switch off-time.

Use Value: 0.39 V max V_F minimizes power loss and thermal stress during high-frequency (≥200 kHz) switching cycles.

Automotive LED Lighting

Low-Voltage Inverter Output Stage

Use Scenario: Used in constant-current LED driver outputs for headlamps or DRLs where reverse voltage from load dump or inductive kick must be blocked.

IC Role / Device Role / Timing Role: Polarity protection diode placed at driver output to prevent backfeed into control IC during fault conditions.

Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient, matching LED thermal envelope requirements.

Use Scenario: Employed in half-bridge inverter outputs for small BLDC fans or HVAC actuators operating from 12 V battery rails.

IC Role / Device Role / Timing Role: Freewheeling element absorbing reactive energy from motor windings during PWM dead-time intervals.

Use Value: 50 A I_FSM rating handles short-duration motor stall currents without degradation or thermal runaway.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SB120-E3/52 (Vishay)	Same DO-214AC package, 20 V V_RRM, but 0.45 V max V_F at 1 A and no AEC-Q101 qualification	Not validated for automotive underhood use; suitable only for industrial or consumer-grade 12 V systems	Select when AEC-Q101 is not required and slightly higher conduction loss is acceptable
SS12 (ON Semiconductor)	Same 20 V V_RRM, 1 A rating, DO-214AC, but rated only to +125°C TJ and lacks guard ring structure	Lower surge robustness and no automotive qualification; limited to commercial-temperature applications	Choose for cost-sensitive non-automotive designs where transient immunity is secondary

Compared with SB120-E3/52 and SS12, the SSL12H delivers lower forward voltage and certified automotive reliability-making it the preferred choice for reverse battery protection and DC/DC freewheeling in vehicles, whereas alternatives serve cost-driven or non-automotive roles where qualification and efficiency margins are relaxed.

Availability

SSL12H is available at Aetrix Electronics and suitable for automotive reverse battery protection, DC/DC converter freewheeling, and LED lighting systems requiring stable component supply with guaranteed AEC-Q101 compliance and long-term production continuity.

Supply support for SSL12H 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 SSL12H belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive electrical systems-including battery protection, lighting, and powertrain auxiliary supplies.

FAQ

What is the maximum repetitive peak reverse voltage of the SSL12H?

The SSL12H has a maximum repetitive peak reverse voltage (V_RRM) of 20 V, as specified in the Absolute Maximum Ratings table. This value is fixed for the SSL12H variant and distinguishes it from the SSL13H (30 V) and SSL14H (40 V). Exceeding 20 V in reverse bias risks irreversible breakdown, so system-level transient suppression must be designed accordingly for the SSL12H.

Is the SSL12H qualified for automotive applications?

Yes, the SSL12H is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing-confirming suitability for underhood automotive use. The SSL12H's marking code "SL12" and version B2304 both correlate to this qualified release.

What is the forward voltage drop of the SSL12H at rated current?

The SSL12H exhibits a maximum forward voltage (V_F) of 0.39 V at 1 A forward current and 25°C junction temperature, measured under pulsed conditions (0.3 ms pulse width). This low V_F directly reduces conduction losses in high-efficiency power stages-critical for thermal management in compact automotive modules where the SSL12H is commonly deployed.

Does the SSL12H have a guard ring structure?

Yes, the SSL12H incorporates a guard ring for overvoltage protection, as stated in the FEATURES section of the datasheet. This structure improves edge termination robustness and suppresses premature avalanche breakdown during voltage transients-enhancing reliability in automotive applications such as reverse battery protection where load dump spikes occur.

What package type does the SSL12H use, and what are its key mechanical attributes?

The SSL12H uses the DO-214AC (SMA) package, with dimensions conforming to JEDEC DO-214 variation AC. Key attributes include matte tin-plated leads compliant with J-STD-002, J-STD-020 Level 1 moisture sensitivity, UL 94V-0 molding compound, and cathode polarity indicated by a molded band. Its mass is approximately 0.066 g.

SSL12H 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:: 390 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

SSL12H FAQ

1.How can I place an order for SSL12H through Aetrix?

Please submit a Request for Quotation (RFQ) for SSL12H 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 SSL12H reliable?

The price and inventory of SSL12H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSL12H is usually 5 days.

3.What payment methods are accepted for SSL12H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSL12H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SSL12H?

SSL12H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SSL12H 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 SSL12H?

For technical support, including SSL12H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSL12H requirements.

6.How does Aetrix verify that SSL12H is sourced from the original manufacturer or authorized distributors?

All SSL12H 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 SSL12H meets industry standards.

7.What is the process for return or replacement of SSL12H?

All SSL12H units undergo pre-shipment inspection (PSI). If there is an issue with SSL12H, 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 SSL12H part is unused and in its original packaging.

Return procedure for SSL12H:

1.Submit a request within 90 days.

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

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