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Taiwan Semiconductor Corporation SS120ALH
- Part No.:
- SS120ALH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SS120ALH.pdf
- Description:
- 1A, 200V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:9,961
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Product details
Overview
SS120ALH from Taiwan Semiconductor is a 1A, 200V Schottky barrier surface-mount rectifier in Thin SMA package, featuring 0.81V forward voltage at 1.0A/25°C, 30A surge capability, and AEC-Q101 qualification for automotive-grade reliability. It serves as a high-efficiency freewheeling or output rectifier in DC/DC converters and SMPS.
For engineers reviewing the SS120ALH datasheet, SS120ALH pinout, SS120ALH application, or SS120ALH equivalent, key selection criteria include its 200V VRRM, low 30pF junction capacitance at 1MHz/4V, -55°C to +150°C operating range, and suitability for high-frequency switching topologies requiring low conduction loss.
Technical Context
The SS120ALH uses a single-die Schottky structure optimized for fast recovery (no minority-carrier storage) and low forward voltage trade-off at higher reverse voltage ratings. Its 200V VRRM enables use in 48V–110V input industrial DC/DC stages where standard 100V Schottkys are insufficient.
Thermal performance is defined by RθJL = 24°C/W and RθJA = 78°C/W on a 5mm × 5mm Cu pad, supporting continuous 1A operation up to +125°C ambient when properly mounted. Reverse leakage remains ≤10µA at 25°C and ≤1mA at 125°C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines usable input voltage headroom in buck-derived topologies |
| IF | 1 A - Continuous average forward current; supports 12W–15W output power in typical 5V/1A SMPS designs |
| VF @ 1A, 25°C | 0.81 V (max 1.10 V) - Directly determines conduction loss (0.81W dissipation at 1A), critical for thermal budget |
| IFSM (8.3ms) | 30 A - Peak non-repetitive surge rating; handles inrush and transient overloads without failure |
| CJ @ 1MHz, 4V | 30 pF - Low junction capacitance minimizes switching loss and EMI in >100kHz converters |
| TJ max | +150 °C - Enables operation in under-hood automotive or sealed industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control modules and body electronics |
Pinout & Package
Package: Thin SMA (DO-214AC), surface-mount, cathode indicated by band, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must route with low-inductance path |
| Cathode | Forward current exit / reverse-blocking terminal | Connected to output rail or positive bus; polarity marking essential for automated placement verification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive temperature cycling, mechanical shock, and humidity testing - eliminates requalification effort for Tier 1 suppliers |
| Low VF at high VRRM | 0.81V @ 1A/25°C - Achieves >92% efficiency in 12V-to-5V 1A buck converters vs. 0.95V+ alternatives |
| 30pF junction capacitance | Reduces capacitive switching loss and high-frequency ringing - improves EMI compliance margin in compact layouts |
| Thin SMA package | 0.028g weight and low profile (<1.7mm height) - enables ultra-thin power supplies and space-constrained PCBs |
| High IFSM/IF ratio (30:1) | Supports robust startup and fault tolerance without derating - simplifies thermal design for intermittent load profiles |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Secondary Rectification |
|---|---|
Use Scenario: Step-down conversion from 24V or 48V battery to 5V/3.3V for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology; handles continuous 1A load with transient surges. Use Value: AEC-Q101 qualification and 150°C TJ max ensure reliability in under-dash environments; 200V VRRM provides margin against load-dump transients. | Use Scenario: 24V input, 12V/1A isolated flyback supply for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode; clamps transformer leakage energy and conducts output current. Use Value: Low 0.81V VF reduces conduction loss by ~120mW vs. 0.93V alternative, lowering heatsink requirements in sealed enclosures. |
| LED Driver Power Stage | USB-C PD Adapter Output Rectification |
Use Scenario: Constant-current LED string driver with 36V–72V input range for streetlighting. IC Role / Device Role / Timing Role: High-side rectifier in boost-derived topology; blocks reverse current during PWM dimming intervals. Use Value: 200V VRRM accommodates full input range plus line surges; 30pF CJ suppresses high-frequency noise coupling into sensitive analog dimming circuits. | Use Scenario: 20V output stage of 65W USB-C PD adapter using active-clamp forward or LLC topology. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in secondary side; operates at 100–300kHz switching frequency. Use Value: Low VF and fast zero-recovery behavior minimize conduction and switching losses, enabling >94% efficiency at full load without gate-drive complexity. |
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-M3/45 | 200V VRRM, 1A IF, VF = 0.79V @ 1A/25°C, SMA package, AEC-Q101 qualified | Identical voltage/current rating and qualification; slightly lower VF but higher CJ (35pF) | Preferred where lowest conduction loss dominates; verify layout EMI margin due to higher capacitance |
| ON Semiconductor SB120 | 200V VRRM, 1A IF, VF = 0.85V @ 1A/25°C, SMA package, no AEC-Q101 documentation | Lacks automotive qualification; higher VF increases thermal load by ~40mW at 1A | Suitable for cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with VS-1EQH02-M3/45 and SB120, the SS120ALH delivers balanced performance: lower CJ than Vishay for better high-frequency behavior, and AEC-Q101 validation absent in ON Semi's SB120 - making it optimal for automotive and ruggedized industrial designs requiring both reliability and EMI control.
Availability
SS120ALH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial SMPS secondary rectification, and LED driver power stages requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for SS120ALH 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, analog ICs, and protection components since 1979.
The SS120ALH belongs to TSC's AEC-Q101-qualified Thin SMA Schottky rectifier family, engineered for high-efficiency, high-reliability power conversion in automotive and industrial environments where thermal robustness and surge resilience are critical.
FAQ
What is the maximum junction temperature rating for SS120ALH?
The SS120ALH has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision B2103. This allows sustained operation in high-ambient environments such as engine compartments or sealed industrial enclosures. Derating curves confirm 1A continuous current is maintainable up to +125°C ambient when mounted on a 5mm × 5mm copper pad. The SS120ALH must not exceed this limit to ensure long-term reliability.
Is SS120ALH pin-compatible with other parts in the SS1xALH series?
Yes, all SS1xALH variants-including SS14ALH, SS16ALH, SS110ALH, SS115ALH, and SS120ALH-share identical Thin SMA (DO-214AC) package dimensions, pinout, and solder pad layout. The SS120ALH uses the same anode/cathode terminal configuration and marking orientation (cathode band), enabling direct substitution within the same footprint when voltage rating is the only variable being scaled. No PCB redesign is required when upgrading from SS115ALH to SS120ALH.
What is the reverse leakage current specification for SS120ALH at elevated temperature?
Per the Taiwan Semiconductor datasheet B2103, the SS120ALH exhibits ≤10 µA reverse leakage current (IR) at 25°C and rated VR, and ≤1 mA at 125°C and rated VR. This low high-temperature leakage ensures minimal standby power loss in always-on systems like automotive body controllers. The SS120ALH's leakage is significantly lower than lower-voltage SS1xALH variants at 125°C, reflecting optimized die processing for higher VRRM stability.
Does SS120ALH require special handling for moisture sensitivity?
No - the SS120ALH is rated Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and does not require dry-packaging or baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during assembly. The SS120ALH's MSL-1 rating is confirmed in the "Mechanical Data" section of the official datasheet and applies across all SS1xALH variants.
How does the forward voltage of SS120ALH compare at 125°C versus 25°C?
At 1.0A forward current, the SS120ALH's typical forward voltage drops from 0.81V at 25°C to 0.66V at 125°C, with a maximum of 0.80V at 125°C. This negative temperature coefficient improves thermal stability in high-power-density designs, as rising junction temperature inherently reduces conduction loss. The SS120ALH's VF behavior is documented in the "Electrical Specifications" table of datasheet B2103 and supports predictable thermal modeling without additional derating.
SS120ALH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 200 V
- Capacitance @ Vr, F:
- 30pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Thin SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS120ALH FAQ
1.How can I place an order for SS120ALH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS120ALH 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 SS120ALH reliable?
The price and inventory of SS120ALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS120ALH is usually 5 days.
3.What payment methods are accepted for SS120ALH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS120ALH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS120ALH?
SS120ALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS120ALH 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 SS120ALH?
For technical support, including SS120ALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS120ALH requirements.
6.How does Aetrix verify that SS120ALH is sourced from the original manufacturer or authorized distributors?
All SS120ALH 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 SS120ALH meets industry standards.
7.What is the process for return or replacement of SS120ALH?
All SS120ALH units undergo pre-shipment inspection (PSI). If there is an issue with SS120ALH, 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 SS120ALH part is unused and in its original packaging.
Return procedure for SS120ALH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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