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Taiwan Semiconductor Corporation SS24LH
- Part No.:
- SS24LH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS24LH.pdf
- Description:
- 2A, 40V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:19,900
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Product details
Overview
SS24LH from Taiwan Semiconductor is a 2 A, 40 V Schottky barrier rectifier in Sub SMA package, featuring low forward voltage (0.50 V at 2 A, 25°C), high surge current capability (50 A), and AEC-Q101 qualification for automotive use. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.
For engineers reviewing the SS24LH datasheet, SS24LH pinout, SS24LH application, or SS24LH equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 0.50 V forward voltage at rated current, AEC-Q101 compliance, Sub SMA surface-mount package, and junction temperature range up to +125°C.
Technical Context
The SS24LH is a single-die Schottky rectifier optimized for low-loss operation in high-frequency switching applications. Its guard ring structure provides overvoltage protection, and its matte tin-plated leads meet J-STD-002 solderability requirements with JESD 201 Class 2 whisker resistance.
Thermal performance is characterized by a junction-to-lead thermal resistance of 17°C/W and junction-to-ambient of 75°C/W. The device operates across –55°C to +125°C junction temperature, with moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; defines safe operating reverse bias in DC/DC output stages |
| IF | 2 A - Continuous forward current rating; sets maximum steady-state conduction capacity |
| VF @ 2A, 25°C | 0.50 V - Low conduction loss enabling high efficiency in low-voltage power paths |
| IFSM | 50 A - Peak non-repetitive surge current handling; supports inrush and transient load conditions |
| TJ max | +125°C - Maximum junction temperature; enables operation in under-hood automotive environments |
| RθJL | 17°C/W - Thermal resistance from junction to lead; informs heatsinking requirements for PCB copper pour design |
Pinout & Package
Package: Sub SMA - Surface-mount, molded plastic case with cathode band polarity marking; meets UL 94V-0 flammability rating and weighs ~0.019 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; connects to higher-potential rail (e.g., output capacitor positive or battery+) for reverse polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Guard ring structure | Enhances ruggedness against transient overvoltage events without external snubbers |
| Moisture sensitivity level 1 | Enables standard SMT assembly without baking or special handling prior to reflow |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained designs |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: Used in synchronous or asynchronous buck converter outputs delivering 3.3–12 V at up to 2 A. IC Role / Device Role / Timing Role: Freewheeling rectifier conducting during low-side switch off-time to maintain inductor current continuity. Use Value: 0.50 V VF minimizes conduction loss, improving efficiency by ~1.5% vs. comparable 0.65 V diodes at 2 A. | Use Scenario: Placed in series with vehicle battery input to protect downstream ECUs from reverse polarity connection. IC Role / Device Role / Timing Role: Unidirectional current gate blocking reverse current flow while passing forward current with minimal drop. Use Value: 40 V VRRM safely withstands 12 V system transients (e.g., load dump), and AEC-Q101 ensures long-term under-hood reliability. |
| Automotive LED Lighting Driver | Low-Voltage Inverter Freewheeling |
Use Scenario: Integrated into constant-current LED driver circuits for headlamps or DRLs powered from 12 V battery rails. IC Role / Device Role / Timing Role: Output rectifier in boost or buck-boost topology, conducting during energy transfer phase. Use Value: Sub SMA footprint allows compact layout; 125°C TJ rating supports sealed lamp housing thermal environments. | Use Scenario: Freewheeling path in half-bridge inverters driving small BLDC motors or solenoids in 24 V industrial actuators. IC Role / Device Role / Timing Role: Provides low-loss recirculation path for inductive kickback during PWM dead time. Use Value: 50 A IFSM handles motor startup surges; low VF reduces heat generation in space-constrained motor control PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS24HE3/5BT | Same 2 A / 40 V rating; DO-214AC (SMA) package instead of Sub SMA; VF = 0.52 V @ 2 A | Slightly larger footprint; may require pad layout revision; identical thermal derating curve | Preferred where standard SMA footprint is already established and JEDEC-compliant packaging is required |
| SB240-E3/54 | 2 A / 40 V; VF = 0.54 V @ 2 A; same Sub SMA package; no AEC-Q101 qualification | Lacks automotive qualification; suitable for industrial/commercial but not safety-critical automotive modules | Select when AEC-Q101 is not mandated and cost sensitivity outweighs qualification requirements |
Compared with SS24HE3/5BT and SB240-E3/54, the SS24LH uniquely combines AEC-Q101 qualification, Sub SMA footprint, and 0.50 V VF - making it the only option meeting automotive reliability, space, and efficiency targets simultaneously.
Availability
SS24LH is available at Aetrix Electronics and suitable for DC/DC converters, reverse battery protection circuits, and automotive LED lighting systems requiring stable component supply and long-term automotive-grade availability.
Supply support for SS24LH 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 and protection components.
The SS24LH belongs to TSC's AEC-Q101-qualified Schottky rectifier family designed specifically for automotive power conversion and protection applications demanding high reliability and low conduction loss.
FAQ
What is the maximum junction temperature rating for SS24LH?
The SS24LH has a maximum junction temperature (TJ max) of +125°C, verified per AEC-Q101 stress testing. This rating applies across its full operating current range and enables deployment in engine bay and headlamp assemblies where ambient temperatures exceed 85°C. Derating curves in the SS24LH datasheet define allowable current reduction above 25°C ambient.
Is SS24LH pin-compatible with other parts in the SS2xLH series?
Yes - all SS2xLH parts, including SS24LH, share identical Sub SMA package dimensions, pinout (anode/cathode), and mechanical footprint. Voltage ratings differ (e.g., SS22LH = 20 V, SS24LH = 40 V), but PCB layout and assembly process are fully interchangeable across the series.
Does SS24LH require special handling during reflow soldering?
No - SS24LH has moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into standard lead-free reflow profiles without baking. Its matte tin-plated leads ensure reliable wetting per J-STD-002.
What is the reverse leakage current of SS24LH at 100°C?
At TJ = 100°C and rated VR = 40 V, the SS24LH exhibits a maximum reverse leakage current (IR) of 15 mA. This value is confirmed in the Electrical Specifications table and impacts standby power loss in always-on automotive modules.
How does the guard ring in SS24LH improve robustness?
The guard ring in SS24LH enhances edge termination ruggedness, raising the critical dV/dt rating to 10,000 V/μs and improving immunity to fast transient voltage spikes. This eliminates need for external RC snubbers in inductive load switching applications like solenoid drivers.
SS24LH 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):
- 40 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 @ 40 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
SS24LH FAQ
1.How can I place an order for SS24LH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS24LH 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 SS24LH reliable?
The price and inventory of SS24LH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS24LH is usually 5 days.
3.What payment methods are accepted for SS24LH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS24LH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS24LH?
SS24LH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS24LH 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 SS24LH?
For technical support, including SS24LH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS24LH requirements.
6.How does Aetrix verify that SS24LH is sourced from the original manufacturer or authorized distributors?
All SS24LH 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 SS24LH meets industry standards.
7.What is the process for return or replacement of SS24LH?
All SS24LH units undergo pre-shipment inspection (PSI). If there is an issue with SS24LH, 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 SS24LH part is unused and in its original packaging.
Return procedure for SS24LH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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