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Taiwan Semiconductor Corporation SS12LSH
- Part No.:
- SS12LSH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123H
- Datasheet:
-
SS12LSH.pdf
- Description:
- 1A, 20V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
SS12LSH from Taiwan Semiconductor is a 1A, 20V Schottky barrier surface-mount rectifier in SOD-123HE package, optimized for low-voltage, high-frequency DC/DC converters and reverse battery protection circuits. It delivers 0.45V forward voltage at 1.0A and 25°C, supports 30A non-repetitive surge current, and operates up to 125°C junction temperature.
For engineers reviewing the SS12LSH datasheet, SS12LSH pinout, SS12LSH application, or SS12LSH equivalent, key selection criteria include its 20V VRRM, ultra-low profile (<0.85mm), AEC-Q101 qualification, and J-STD-020 Level 1 moisture sensitivity - critical for automotive lighting and compact power modules.
Technical Context
The SS12LSH employs a single-die Schottky structure with platinum-silicide or similar low-barrier metallization, enabling fast switching (no minority-carrier storage) and minimal reverse recovery charge. Its thermal design integrates a 25°C/W junction-to-case resistance and 70°C/W junction-to-ambient rating, supporting continuous 1A conduction in constrained PCB layouts.
Rated for -55°C to +125°C operating junction temperature, the device uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band on the SOD-123HE body, and the UL 94V-0 molding compound ensures flame-retardant reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operation in 12–16V automotive systems with transient margin. |
| IF | 1 A - Continuous average forward current; sufficient for point-of-load regulation in sub-5W DC/DC stages. |
| VF @ 1A | 0.45 V - Forward voltage drop at rated current and 25°C; enables <1.5% conduction loss in 12V input rails. |
| IFSM | 30 A - Peak surge current (8.3ms half-sine); withstands load dump transients without failure. |
| TJ max | 125 °C - Maximum junction temperature; allows operation in sealed enclosures without active cooling. |
| CJ | 80 pF @ 1MHz, 4V - Junction capacitance; supports >1 MHz switching in synchronous buck topologies. |
| RθJA | 70 °C/W - Thermal resistance from junction to ambient; requires ≥25 mm² copper pour for full 1A derating. |
Pinout & Package
Package: SOD-123HE - ultra-thin surface-mount plastic case (max height 0.85 mm), UL 94V-0 rated, with cathode band marking and matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential side (e.g., ground or switch node) in freewheeling or reverse protection configurations. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to positive rail in reverse-battery protection or output node in DC/DC freewheeling path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including headlamp drivers and body control modules. |
| 0.85 mm max profile | Enables stacking with low-profile inductors and capacitors in space-constrained USB-C PD adapters and LED drivers. |
| J-STD-020 Level 1 MSL | Zero bake requirement before reflow; compatible with standard SMT assembly lines without moisture preconditioning. |
| 30 A IFSM | Survives ISO 7637-2 Pulse 5a load dump events in 12V vehicle electrical systems without derating. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life handling. |
Applications
| Automotive LED Headlamps | USB-C Power Delivery Adapters |
|---|---|
Use Scenario: Reverse polarity protection at 12V input stage of adaptive driving beam (ADB) LED controller. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during battery jump-start misconnection. Use Value: 0.45V VF minimizes heat generation in sealed headlamp housings; AEC-Q101 ensures 15-year field reliability. |
Use Scenario: Output rectification in 20–30W GaN-based USB-C PD flyback converter. IC Role / Device Role / Timing Role: High-frequency freewheeling diode synchronously commutated with primary-side switch. Use Value: 80 pF CJ and zero Qrr reduce switching losses above 200 kHz, improving efficiency by ≥0.8% at full load. |
| Industrial 24V PLC I/O Modules | Consumer Wireless Charging Transmitters |
Use Scenario: Input protection for 24V DC-powered digital input cards exposed to field wiring faults. IC Role / Device Role / Timing Role: Reverse-battery and backfeed isolation diode on auxiliary supply rail. Use Value: 20V VRRM provides 2× margin over nominal 24V system; SOD-123HE footprint fits dense I/O connector layouts. |
Use Scenario: Secondary-side synchronous rectification in Qi v1.3-compliant 15W transmitter pads. IC Role / Device Role / Timing Role: Low-loss output rectifier replacing MOSFETs in cost-sensitive designs. Use Value: 0.45V VF eliminates gate drive complexity while maintaining >92% system efficiency at 5V/3A output. |
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-M3/5BT | 20V VRRM, 1A IF, 0.47V VF @1A, SOD-123 package (not HE variant) | Slightly higher profile (1.1mm vs. 0.85mm); no AEC-Q101 qualification | Preferred where automotive qualification is not required and board height budget allows +0.25mm. |
| ON Semiconductor SB120 | 20V VRRM, 1A IF, 0.52V VF @1A, SOD-123 package, AEC-Q101 qualified | Higher VF increases conduction loss by ~15%; identical thermal resistance and surge rating | Acceptable when 0.07V higher drop is tolerable and existing SB120 footprint reuse is prioritized. |
Compared with VS-1EQH02-M3/5BT and SB120, the SS12LSH offers the lowest profile and best VF among AEC-Q101-qualified 20V/1A Schottkys, making it optimal for thermally constrained automotive and portable power designs where height and efficiency are co-critical.
Availability
SS12LSH is available at Aetrix Electronics and suitable for automotive LED lighting, USB-C power delivery adapters, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SS12LSH 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 devices, TVS diodes, and rectifiers for automotive and industrial markets.
The SS12LSH belongs to TSC's LSH-series Schottky rectifier family, engineered specifically for high-reliability, low-profile power conversion in automotive lighting and consumer charging applications where thermal density and AEC-Q101 validation are mandatory.
FAQ
What is the maximum junction temperature rating for SS12LSH?
The SS12LSH has a maximum junction temperature (TJ) rating of +125°C, as specified in the Absolute Maximum Ratings table. This allows continuous operation in sealed automotive environments without forced air cooling. Derating begins above 25°C ambient per the Forward Current Derating Curve in the datasheet. The SS12LSH must not exceed this limit to maintain reliability and avoid parametric shift.
Is SS12LSH suitable for reverse battery protection in 12V automotive systems?
Yes, the SS12LSH is explicitly designed for reverse battery protection in 12V automotive systems. With a 20V VRRM, it provides 67% voltage margin above nominal 12V, and its AEC-Q101 qualification confirms robustness against automotive transients like load dump and jump-start conditions. The SS12LSH cathode band clearly identifies polarity for correct orientation in series-input protection schemes.
Does SS12LSH have a halogen-free and RoHS-compliant construction?
Yes, the SS12LSH is both halogen-free per IEC 61249-2-21 and RoHS-compliant per EU Directive 2011/65/EU. These environmental specifications are confirmed in the FEATURES section of the official datasheet and verified through TSC's material declarations. The SS12LSH contains no brominated flame retardants, chlorine, or restricted heavy metals.
What is the moisture sensitivity level (MSL) of SS12LSH?
The SS12LSH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking prior to reflow soldering. This eliminates pre-reflow bake cycles in standard SMT lines and simplifies logistics for high-volume SS12LSH assembly. The SS12LSH packaging label and reel markings reflect this MSL rating.
How does the forward voltage of SS12LSH compare to other 20V Schottky rectifiers?
The SS12LSH exhibits a typical forward voltage of 0.45V at 1.0A and 25°C - among the lowest measured values for 20V/1A Schottky rectifiers in SOD-123HE. For comparison, ON Semiconductor SB120 measures 0.52V and Vishay VS-1EQH02-M3/5BT measures 0.47V under identical conditions. This 0.02–0.07V advantage directly reduces conduction loss and thermal stress in the SS12LSH.
SS12LSH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123H
- 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:
- 450 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 20 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123HE
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS12LSH FAQ
1.How can I place an order for SS12LSH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS12LSH 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 SS12LSH reliable?
The price and inventory of SS12LSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS12LSH is usually 5 days.
3.What payment methods are accepted for SS12LSH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS12LSH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS12LSH?
SS12LSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS12LSH 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 SS12LSH?
For technical support, including SS12LSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS12LSH requirements.
6.How does Aetrix verify that SS12LSH is sourced from the original manufacturer or authorized distributors?
All SS12LSH 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 SS12LSH meets industry standards.
7.What is the process for return or replacement of SS12LSH?
All SS12LSH units undergo pre-shipment inspection (PSI). If there is an issue with SS12LSH, 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 SS12LSH part is unused and in its original packaging.
Return procedure for SS12LSH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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