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Taiwan Semiconductor Corporation SS25LH
- Part No.:
- SS25LH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SS25LH.pdf
- Description:
- 2A, 50V, SCHOTTKY RECTIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:9,911
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Product details
Overview
SS25LH from Taiwan Semiconductor is a 2 A, 50 V Schottky barrier rectifier in Sub SMA package, featuring 0.70 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 DC/DC converters and reverse battery protection circuits.
For engineers reviewing the SS25LH datasheet, SS25LH pinout, SS25LH application, or SS25LH equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 10 mA reverse leakage at 100°C, 17 °C/W junction-to-lead thermal resistance, and Sub SMA surface-mount compatibility with automated placement.
Technical Context
The SS25LH implements a single-die Schottky junction optimized for low forward voltage drop and fast switching, with no recovery time limitation. Its guard ring structure enhances ruggedness against transient overvoltage events, and its JESD201 Class 2 whisker-resistant matte tin plating ensures long-term solder joint reliability.
Rated for operation from –55°C to +150°C junction temperature, the device supports high ambient environments typical in under-hood automotive applications. Its 10,000 V/μs critical dV/dt rating confirms robustness against rapid voltage transients in inductive load switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse blocking voltage; defines safe operating limit in reverse-biased freewheeling or polarity protection roles |
| IF | 2 A - continuous forward current rating at TA = 25°C; determines steady-state power handling in DC/DC output stages |
| VF @ 2A, 25°C | 0.70 V - forward voltage drop; directly impacts conduction loss (1.4 W at 2 A) and thermal design margin |
| IFSM | 50 A - non-repetitive surge current (8.3 ms half-sine); enables survival during load dump or inrush events |
| IR @ 50 V, 100°C | 10 µA - reverse leakage at elevated temperature; critical for low-power standby integrity in battery-connected systems |
| RθJL | 17 °C/W - junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking without heatsink requirement |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test standard |
Pinout & Package
Package: Sub SMA - surface-mount, molded plastic case with cathode band marking; dimensions per TSC outline drawing; moisture sensitivity level 1 (J-STD-020), RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or switch node) in freewheeling or reverse polarity protection |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; connects to higher-potential rail (e.g., battery input or DC bus) in protection configurations |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances edge termination robustness, enabling reliable operation at 100% of VRRM under transient overvoltage conditions |
| Matte tin-plated leads | Meets J-STD-002 solderability and JESD201 Class 2 whisker resistance-ensures long-term interconnect integrity |
| Low VF at high IF | 0.70 V @ 2 A reduces conduction loss by ~25% vs. comparable 60 V Schottkys, lowering thermal stress in compact layouts |
| Sub SMA footprint | Compatible with standard SMA land patterns; enables drop-in replacement in existing designs using larger SMA packages |
| Moisture sensitivity level 1 | Zero bake requirement before reflow-supports immediate use from sealed tape-and-reel packaging |
Applications
| Automotive DC/DC Converters | Reverse Battery Protection |
|---|---|
Use Scenario: Step-down conversion in 12 V automotive subsystems powering infotainment or ADAS sensors. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter topology. Use Value: 0.70 V VF minimizes power loss at 2 A load, improving efficiency and reducing heatsink need in space-constrained modules. | Use Scenario: Preventing damage when vehicle battery is connected with reversed polarity during service or jump-start. IC Role / Device Role / Timing Role: Series-connected anode-to-load, cathode-to-battery+; conducts only during correct polarity. Use Value: AEC-Q101 qualification and 50 A IFSM ensure survivability during accidental reverse connection with high-current sources. |
| Freewheeling Diodes | Low-Voltage Inverters |
Use Scenario: Energy recirculation path across inductive loads such as solenoids, relays, or motor windings. IC Role / Device Role / Timing Role: Freewheeling path during MOSFET/FET off-time in H-bridge or flyback topologies. Use Value: Fast unidirectional conduction with no reverse recovery charge avoids voltage spikes and EMI in high-frequency switching. | Use Scenario: High-frequency AC generation in LED drivers or small BLDC motor controllers. IC Role / Device Role / Timing Role: Output rectification stage in full-bridge inverter output filtering. Use Value: 10,000 V/μs dV/dt rating prevents false turn-on during fast-rising inverter edge transitions. |
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-2EY50-M3/5BT | Same 50 V VRRM, 2 A IF, but VF = 0.72 V @ 2 A; Sub SMA package; AEC-Q101 qualified | Identical functional role; slightly higher VF increases conduction loss by ~0.04 W at 2 A | Preferred where Vishay supply chain alignment or dual-sourcing is required |
| ON Semiconductor SB250 | 50 V VRRM, 2 A IF, VF = 0.75 V @ 2 A; DO-214AA (SMA) package; not AEC-Q101 qualified | Lacks automotive qualification; unsuitable for under-hood deployment without additional validation | Cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with VS-2EY50-M3/5BT and SB250, the SS25LH offers lower forward voltage and guaranteed AEC-Q101 compliance in the same Sub SMA footprint-making it optimal for automotive power rails requiring both efficiency and qualification assurance.
Availability
SS25LH is available at Aetrix Electronics and suitable for automotive DC/DC converters, reverse battery protection circuits, and freewheeling diode applications requiring stable component supply, AEC-Q101 traceability, and consistent Sub SMA form factor.
Supply support for SS25LH 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 global automotive, industrial, and consumer markets since 1979.
The SS25LH belongs to TSC's SSxLH Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability automotive power conversion and protection-emphasizing low VF, rugged transient response, and AEC-Q101 compliance.
FAQ
What is the maximum junction temperature rating for the SS25LH?
The SS25LH has a maximum junction temperature (TJ MAX) of +150°C, validated per AEC-Q101 stress testing. This allows operation in under-hood automotive environments where ambient temperatures exceed 105°C, provided thermal design maintains junction temperature below this limit. The SS25LH datasheet specifies derating curves confirming usable current down to 0 A at 150°C ambient with appropriate PCB copper area.
Is the SS25LH pin-compatible with standard SMA packages?
Yes, the SS25LH uses the Sub SMA package-a dimensionally compatible variant of the industry-standard SMA (DO-214AC) outline. Its footprint matches common SMA land patterns, enabling mechanical and soldering compatibility. However, users must verify pad layout against TSC's published Sub SMA mechanical drawing, as lead width and spacing may differ slightly from legacy SMA variants.
Does the SS25LH require baking before reflow soldering?
No, the SS25LH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is exempt from dry-pack requirements and does not require pre-reflow baking. Devices shipped in sealed tape-and-reel packaging can be placed directly into reflow ovens without moisture mitigation steps-reducing manufacturing overhead and preventing potential die damage from improper bake cycles.
What is the reverse leakage current of the SS25LH at 125°C?
At rated reverse voltage (50 V) and junction temperature of 125°C, the SS25LH exhibits a maximum reverse leakage current (IR) of 5 mA, as specified in the electrical characteristics table. This value reflects worst-case behavior under high-temperature stress and is critical for evaluating standby power loss in always-on automotive modules powered from battery rails.
How does the guard ring in the SS25LH improve reliability?
The guard ring in the SS25LH provides enhanced edge termination that suppresses surface leakage and prevents premature avalanche breakdown at the silicon periphery. This structure directly improves ruggedness against repetitive overvoltage transients-such as load dump pulses in automotive 12 V systems-by distributing electric field stress and raising the effective breakdown voltage margin beyond the rated 50 V VRRM.
SS25LH 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):
- 50 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SS25LH FAQ
1.How can I place an order for SS25LH through Aetrix?
Please submit a Request for Quotation (RFQ) for SS25LH 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 SS25LH reliable?
The price and inventory of SS25LH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS25LH is usually 5 days.
3.What payment methods are accepted for SS25LH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS25LH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SS25LH?
SS25LH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SS25LH 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 SS25LH?
For technical support, including SS25LH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS25LH requirements.
6.How does Aetrix verify that SS25LH is sourced from the original manufacturer or authorized distributors?
All SS25LH 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 SS25LH meets industry standards.
7.What is the process for return or replacement of SS25LH?
All SS25LH units undergo pre-shipment inspection (PSI). If there is an issue with SS25LH, 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 SS25LH part is unused and in its original packaging.
Return procedure for SS25LH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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