My Inquiry
My Account
Taiwan Semiconductor Corporation SS22LH
- Part No.:
- SS22LH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS22LH.pdf
- Description:
- 2A, 20V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:4,090
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SS22LH from Taiwan Semiconductor is a 2 A, 20 V Schottky barrier surface-mount rectifier in Sub SMA package, featuring 0.50 V forward voltage at 2 A and 25 °C, 50 A peak surge current, AEC-Q101 qualification, and guard ring overvoltage protection-used in automotive reverse battery protection and DC/DC converter freewheeling paths.
For engineers reviewing the SS22LH datasheet, SS22LH pinout, SS22LH application, or SS22LH equivalent, key selection factors include its 20 V repetitive peak reverse voltage, 125 °C maximum junction temperature, low VF for high-efficiency 12 V system designs, and Sub SMA footprint compatibility with automated SMT assembly.
Technical Context
The SS22LH operates as a single-die Schottky rectifier optimized for low-voltage, high-frequency switching applications. Its 0.50 V typical forward voltage at 2 A and 25 °C enables reduced conduction loss versus standard PN diodes, while the 10,000 V/μs critical dV/dt rating supports robust operation in fast-switching DC/DC topologies.
Thermally, it delivers 17 °C/W junction-to-lead resistance and 75 °C/W junction-to-ambient resistance, enabling sustained 2 A average current in compact layouts with minimal heatsinking. The device is rated for -55 °C to +125 °C junction operation and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in 12 V automotive systems with transient clamping margin. |
| IF | 2 A - Continuous forward current rating; supports steady-state power delivery in compact DC/DC converters without derating at TA ≤ 75 °C. |
| VF @ 2 A, 25 °C | 0.50 V - Low conduction loss; reduces power dissipation to 1.0 W at full load, improving thermal margin in sealed enclosures. |
| IFSM | 50 A - Non-repetitive surge capability; withstands inrush and fault currents in automotive lighting and ECU power rails. |
| TJ max | 125 °C - Maximum junction temperature; enables operation in under-hood environments with ambient up to 85 °C and moderate PCB copper area. |
| RθJL | 17 °C/W - Efficient heat transfer to PCB pad; allows direct thermal coupling to internal ground planes for passive cooling. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements including HTGB, HTRB, and temperature cycling. |
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. Compatible with standard SMA reflow profiles and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires low-inductance trace routing to minimize ringing. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail (e.g., input bus); must maintain clearance from adjacent high-dV/dt nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances edge termination reliability and prevents premature avalanche breakdown under voltage transients in automotive 12 V systems. |
| AEC-Q101 qualification | Validates long-term reliability for automotive body control modules, lighting drivers, and infotainment power supplies. |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports just-in-time SMT assembly without dry-pack handling. |
| Halogen-free construction | Complies with IEC 61249-2-21; meets automotive OEM environmental material declarations and end-of-life recycling requirements. |
| High dV/dt immunity | 10,000 V/μs rating ensures stable blocking during fast-switching MOSFET transitions in synchronous rectifier circuits. |
Applications
| Reverse Battery Protection | DC/DC Converter Freewheeling |
|---|---|
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 current blocker placed in series with main power input; conducts only during correct polarity. Use Value: 0.50 V forward drop minimizes voltage loss in 12 V supply path, preserving headroom for downstream regulators and sensors. | Use Scenario: Provides low-loss return path for inductor current during high-side MOSFET off-time in buck converters powering ADAS cameras. IC Role / Device Role / Timing Role: Freewheeling diode conducting during discontinuous conduction mode (DCM) intervals. Use Value: 50 A surge rating handles inductor energy dump during load transients without thermal runaway. |
| Automotive LED Lighting | Low-Voltage Inverter Output Stage |
Use Scenario: Protects LED driver ICs from reverse EMF generated by inductive ballast components during PWM dimming. IC Role / Device Role / Timing Role: Clamp diode across inductive load; activated only during flyback events. Use Value: Guard ring design prevents localized breakdown at edge terminations during repeated 100 V transients on 24 V commercial vehicle lighting buses. | Use Scenario: Rectifies high-frequency AC output from half-bridge inverters driving small BLDC fans in HVAC modules. IC Role / Device Role / Timing Role: Output rectifier converting 20–50 kHz square-wave AC to regulated DC. Use Value: 75 °C/W RθJA enables natural-convection cooling in space-constrained fan housings without forced airflow. |
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-2EY20 | Same 2 A / 20 V rating, but TO-277 package (3-pin, anode-cathode-anode); higher VF (0.55 V typ.) and RθJA (100 °C/W). | Requires different PCB footprint and offers lower thermal performance in dense layouts. | Prefer SS22LH for Sub SMA-compatible designs requiring lower thermal resistance and automated placement. |
| ON Semiconductor SB220 | 2 A / 20 V Schottky in SMA package; VF = 0.52 V typ., RθJA = 80 °C/W, not AEC-Q101 qualified. | Lacks automotive qualification; suitable for industrial or consumer-grade 12 V supplies only. | Select SS22LH where AEC-Q101 compliance and tighter VF tolerance are mandatory for automotive production. |
Compared with VS-2EY20 and SB220, the SS22LH delivers superior thermal performance (17 °C/W RθJL), guaranteed AEC-Q101 qualification, and optimized Sub SMA geometry for high-yield SMT assembly-making it the preferred choice for automotive power rail protection and compact DC/DC freewheeling.
Availability
SS22LH is available at Aetrix Electronics and suitable for automotive reverse battery protection, DC/DC converter freewheeling, and LED lighting power management requiring stable component supply across production lifecycles.
Supply support for SS22LH 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 automotive, industrial, and consumer markets since 1979.
The SS22LH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability 12 V and 24 V automotive power systems demanding low VF, high surge tolerance, and robust transient immunity.
FAQ
What is the maximum junction temperature rating for the SS22LH?
The SS22LH has a maximum junction temperature (TJ max) of +125 °C, validated per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments where ambient temperatures reach 85 °C, provided PCB thermal design maintains junction-to-lead resistance at or below the specified 17 °C/W.
Is the SS22LH pin-compatible with other devices in the SS2xLH family?
No-the SS22LH shares the same Sub SMA package and two-terminal configuration with all SS2xLH variants, but voltage ratings differ across the family (e.g., SS23LH = 30 V, SS24LH = 40 V). Pinout is identical, but electrical replacement requires verification of VRRM, VF, and thermal limits for the target application.
Does the SS22LH require a moisture barrier bag or baking before reflow?
No-the SS22LH is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and placed directly into reflow without baking or dry-pack handling, simplifying SMT line logistics and reducing process risk.
What is the forward voltage specification for SS22LH at elevated temperature?
Per the datasheet, the SS22LH forward voltage is characterized at 25 °C (0.50 V typ. at 2 A). While VF decreases with rising temperature, the device's maximum rated junction temperature remains 125 °C; design margins should account for VF drift using the typical curve in Figure 4 of the SS22LH–SS215LH datasheet.
How does the guard ring feature improve reliability in automotive applications?
The guard ring in the SS22LH enhances edge termination robustness against localized electric field crowding during voltage transients. In automotive systems, this prevents premature avalanche failure during load-dump or jump-start events-directly supporting AEC-Q101 qualification for reverse battery protection and ECU power rail applications.
SS22LH 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):
- 20 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS22LH FAQ
1.How can I place an order for SS22LH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS22LH 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 SS22LH reliable?
The price and inventory of SS22LH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS22LH is usually 5 days.
3.What payment methods are accepted for SS22LH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS22LH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS22LH?
SS22LH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS22LH 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 SS22LH?
For technical support, including SS22LH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS22LH requirements.
6.How does Aetrix verify that SS22LH is sourced from the original manufacturer or authorized distributors?
All SS22LH 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 SS22LH meets industry standards.
7.What is the process for return or replacement of SS22LH?
All SS22LH units undergo pre-shipment inspection (PSI). If there is an issue with SS22LH, 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 SS22LH part is unused and in its original packaging.
Return procedure for SS22LH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SS22LH Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
