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Taiwan Semiconductor Corporation SS24LWH
- Part No.:
- SS24LWH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123W
- Datasheet:
-
SS24LWH.pdf
- Description:
- DIODE SCHOTTKY 40V 2A SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:14,589
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Product details
Overview
SS24LWH from Taiwan Semiconductor is a 2 A, 40 V Schottky barrier surface-mount rectifier in SOD-123W package, featuring low forward voltage (≤0.55 V at 2 A, 25°C), 50 A peak surge current, and AEC-Q101 qualification for automotive-grade reliability-used in DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SS24LWH datasheet, SS24LWH pinout, SS24LWH application, or SS24LWH equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 25°C/W junction-to-lead thermal resistance, moisture sensitivity level 1 rating, and cathode-band polarity marking for automated assembly verification.
Technical Context
The SS24LWH employs a single-die Schottky structure optimized for low-loss operation in high-frequency switching applications. Its guard ring design enhances over-voltage robustness while maintaining fast recovery characteristics without minority-carrier storage delay.
Thermal performance is defined by RθJL = 25°C/W and RθJA = 80°C/W, enabling reliable operation up to 150°C junction temperature. Reverse leakage remains ≤200 µA at rated 40 V and 25°C, supporting stable biasing in low-power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 2 A continuous - supports compact DC/DC converter output stages without forced cooling |
| Peak Reverse Voltage (VRRM) | 40 V - suitable for 12 V–24 V automotive and industrial bus protection |
| Forward Voltage (VF) | ≤0.55 V at 2 A, 25°C - reduces conduction loss and improves system efficiency |
| Surge Current (IFSM) | 50 A (8.3 ms half-sine) - withstands load dump and inductive kick transients |
| Junction Temp (TJ) | −55°C to +150°C - enables deployment in under-hood automotive environments |
| Thermal Resistance (RθJL) | 25°C/W - allows direct PCB copper pour heat sinking without heatsink |
| Moisture Sensitivity | Level 1 per J-STD-020 - no bake required before reflow, simplifying SMT line flow |
Pinout & Package
Package: SOD-123W - surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity indicator. Weight: 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse protection configurations |
| Cathode | Current exit point during forward conduction; marked by band | Connected to higher-potential rail (e.g., battery positive or switch node) to enable unidirectional blocking |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and ESD |
| Guard ring structure | Improves edge termination robustness against transient over-voltage without derating VRRM |
| Low VF (≤0.55 V) | Reduces power dissipation by >30% vs. comparable 40 V silicon diodes at 2 A |
| J-STD-002 solderability | Ensures consistent wetting and joint integrity during lead-free reflow (260°C peak) |
| Halogen-free & RoHS | Meets EU Directive 2011/65/EU and IPC-4101D halogen limits (<900 ppm Cl + Br) |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: High-efficiency 12 V input to 3.3 V/5 V step-down converter in automotive body control module. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology. Use Value: Low VF minimizes conduction loss; 50 A IFSM handles startup surges without derating. | Use Scenario: Preventing damage during incorrect battery terminal connection in infotainment head unit. IC Role / Device Role / Timing Role: Series-connected reverse polarity protection element on main power rail. Use Value: 40 V VRRM exceeds 12 V system max; <0.55 V drop preserves voltage margin for downstream LDOs. |
| Car Lighting LED Driver | Low-Voltage Inverter Freewheeling |
Use Scenario: Constant-current LED driver for interior map lights with PWM dimming. IC Role / Device Role / Timing Role: Flyback catch diode in boost-based LED current source. Use Value: Fast switching and low IR enable clean PWM transitions; SOD-123W fits tight board space. | Use Scenario: H-bridge motor drive in HVAC blower with regenerative braking energy recapture. IC Role / Device Role / Timing Role: Freewheeling path for inductive back-EMF during PWM off-time. Use Value: 150°C TJ rating sustains operation during sustained high-current bursts; guard ring prevents avalanche failure. |
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-2EYH04-M3/5BT | Same SOD-123W package, 40 V VRRM, but VF = 0.57 V (max) at 2 A; not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial DC/DC where qualification not mandated | Select when AEC-Q101 is not required and cost sensitivity outweighs minor VF penalty |
| ON Semiconductor SB240-E3/54 | SOD-123 package (not SOD-123W), 40 V VRRM, VF = 0.54 V (typ); AEC-Q101 qualified; RθJA = 100°C/W (vs. 80°C/W) | Higher thermal resistance requires larger copper area; same footprint but different land pattern due to SOD-123 vs. SOD-123W dimensions | Select only if existing layout accommodates SOD-123; verify pad layout compatibility before substitution |
Compared with VS-2EYH04-M3/5BT and SB240-E3/54, the SS24LWH provides the lowest thermal resistance (80°C/W), guaranteed AEC-Q101 compliance, and tighter VF distribution-all within the industry-standard SOD-123W footprint optimized for high-volume automotive SMT lines.
Availability
SS24LWH is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, and LED lighting systems requiring stable component supply across extended production lifecycles.
Supply support for SS24LWH 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 SS24LWH belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability 12 V–24 V automotive subsystems demanding low loss, surge resilience, and long-term parametric stability.
FAQ
What is the maximum junction temperature rating for SS24LWH?
The SS24LWH has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings table. This allows operation in under-hood automotive environments and high-ambient industrial settings. Derating curves in the SS24LWH datasheet define safe IF vs. TJ relationships, and the device maintains specified VF and IR performance up to this limit when mounted on recommended PCB copper area.
Is SS24LWH compatible with lead-free reflow soldering processes?
Yes, SS24LWH is fully compatible with lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the SOD-123W package is rated for peak reflow temperatures up to 260°C. The moisture sensitivity level is rated at Level 1 per J-STD-020, meaning no pre-bake is required prior to assembly-reducing manufacturing complexity and cost.
Does SS24LWH have automotive qualification?
Yes, SS24LWH is AEC-Q101 qualified. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and electrostatic discharge (ESD) per human-body model (HBM) and machine model (MM). The qualification applies specifically to the SS24LWH variant, not the entire SS2xLWH family, and is documented in Taiwan Semiconductor's official AEC-Q101 certificate for this part number.
What is the reverse leakage current specification for SS24LWH at 25°C?
The SS24LWH reverse leakage current (IR) is specified at ≤200 µA at rated 40 V reverse voltage and 25°C junction temperature, per electrical specifications table. This value is measured using a 30 ms pulse test. At elevated temperatures (e.g., 125°C), IR increases predictably and remains within design-safe margins for typical automotive reverse protection use cases.
How does the SOD-123W package differ from standard SOD-123 in SS24LWH?
The SOD-123W package used by SS24LWH features wider leads and enhanced thermal pad geometry versus standard SOD-123, resulting in lower RθJA (80°C/W vs. ~100°C/W) and improved power handling. Mechanical drawings confirm longer lead extensions and optimized copper access areas. This difference affects PCB pad layout-SOD-123W requires specific land patterns defined in TSC's HQ2SD07-SOD123W-037 drawing, not interchangeable with generic SOD-123 footprints.
SS24LWH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 200 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
- Operating Temperature - Junction:
- -55°C ~ 125°C
SS24LWH FAQ
1.How can I place an order for SS24LWH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS24LWH 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 SS24LWH reliable?
The price and inventory of SS24LWH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS24LWH is usually 5 days.
3.What payment methods are accepted for SS24LWH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS24LWH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS24LWH?
SS24LWH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS24LWH 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 SS24LWH?
For technical support, including SS24LWH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS24LWH requirements.
6.How does Aetrix verify that SS24LWH is sourced from the original manufacturer or authorized distributors?
All SS24LWH 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 SS24LWH meets industry standards.
7.What is the process for return or replacement of SS24LWH?
All SS24LWH units undergo pre-shipment inspection (PSI). If there is an issue with SS24LWH, 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 SS24LWH part is unused and in its original packaging.
Return procedure for SS24LWH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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