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Taiwan Semiconductor Corporation TLD5S15AH
- Part No.:
- TLD5S15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD5S15AH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
TLD5S15AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-218AB package, rated for 15.0 V working stand-off voltage, 16.7–18.5 V breakdown voltage at 5.0 mA, and 3600 W peak pulse power (10/1000 μs). It delivers 24.4 V clamping voltage at 148 A peak impulse current and supports automotive load dump protection up to TJ = 175 °C.
For engineers reviewing the TLD5S15AH datasheet, TLD5S15AH pinout, TLD5S15AH application, or TLD5S15AH equivalent, key selection criteria include unidirectional surge capability, ISO 7637-2 compliance, DO-218AB thermal performance (RθJC = 0.9 °C/W), and AEC-Q101 qualification for under-hood automotive use.
Technical Context
The TLD5S15AH is a single-die, unidirectional TVS diode optimized for high-energy transients in 12 V automotive systems. Its junction passivation design enables stable operation up to 175 °C junction temperature and meets ISO 16750-2 load dump requirements with 10 ms exponential waveform capability.
It features low clamping ratio (VC/VBR ≈ 1.46), tight VBR tolerance (±6.7% at 25 °C), and a positive temperature coefficient of breakdown voltage (αT = 0.080 %/°C), ensuring predictable voltage shift across temperature for robust system-level surge coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before leakage exceeds 10 µA |
| VBR (min/max) | 16.7–18.5 V at IT = 5.0 mA - Confirmed breakdown range ensures reliable turn-on during surges without premature conduction |
| VC @ IPPM | 24.4 V at 148 A (10/1000 µs) - Clamping voltage limits downstream IC stress during ISO 7637-2 Pulse 5a events |
| PPPM (10/1000 µs) | 3600 W - Sustains high-energy load dump transients without failure in compact DO-218AB footprint |
| RθJC | 0.9 °C/W - Enables effective heatsinking to maintain TJ ≤ 175 °C under sustained 5 W steady-state dissipation |
| αT | 0.080 %/°C - Predictable VBR drift supports accurate thermal derating in wide-temperature automotive environments |
Pinout & Package
DO-218AB surface-mount package with matte tin-plated leads, polarity-marked cathode band, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. Weight: 2.677 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; defines unidirectional conduction direction |
| Cathode | High-side surge input terminal | Receives transient energy from protected line (e.g., battery rail); clamps to anode when VAK ≥ VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| ISO 7637-2 & ISO 16750-2 compliance | Passes Load Dump Pulse 5a (10 ms exponential) and other vehicle-level surge tests without degradation |
| Junction temperature rating | Operates continuously from –55 °C to +175 °C - supports placement near engines or power electronics |
| Uni-directional configuration | Blocks reverse leakage <10 µA at VWM while clamping positive transients only - simplifies biasing in DC systems |
Applications
| Automotive Battery Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Protects 12 V battery-fed circuits against load dump surges up to 35 V and 100 ms duration. IC Role / Device Role / Timing Role: TVS diode placed directly at connector entry point to clamp transients before reaching DC-DC converters or microcontrollers. Use Value: Limits clamped voltage to 24.4 V at 148 A, preventing damage to downstream 30 V-rated power management ICs. | Use Scenario: Shields ECU sensor inputs and CAN transceiver power rails from coupled transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC supply line, coordinated with upstream fuse and downstream LC filter. Use Value: Maintains functional safety by holding rail voltage below 25 V during ISO 7637-2 Pulse 5a, avoiding brownout or latch-up. |
| Body Control Module (BCM) Power Input | ADAS Camera Power Supply Protection |
Use Scenario: Secures BCM main 12 V input against jump-start spikes and alternator ripple-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression device in front of buck converter input stage. Use Value: Withstands 3600 W peak pulse power and dissipates 5 W continuously, enabling compact layout without external heatsink. | Use Scenario: Safeguards 12 V camera module power input exposed to harness-induced transients in rear-view or surround-view systems. IC Role / Device Role / Timing Role: First-line TVS on camera PCB edge connector, selected for low capacitance and fast response (<1 ns). Use Value: Delivers 24.4 V clamping at 148 A while maintaining RθJC = 0.9 °C/W for thermal stability in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | DO-214AC package, lower PPPM (400 W), higher RθJC (~35 °C/W), no AEC-Q101 qualification | Not suitable for automotive load dump; limited to consumer or industrial low-energy surges | Select only for cost-sensitive non-automotive designs where 3600 W surge immunity is not required |
| SMCJ15A | DO-214AB package, PPPM = 1500 W (10/1000 µs), RθJC ≈ 3.0 °C/W, AEC-Q101 qualified but lower thermal capability | Acceptable for moderate automotive surges but cannot sustain full ISO 7637-2 Pulse 5a without derating | Use where board space allows larger footprint and thermal margin is managed via copper pour or airflow |
Compared with SMAJ15A and SMCJ15A, the TLD5S15AH provides 2.4× higher peak power handling and 3.3× better thermal resistance, making it uniquely suited for high-reliability 12 V automotive power rail protection where compact DO-218AB mounting and 175 °C operation are mandatory.
Availability
TLD5S15AH is available at Aetrix Electronics and suitable for automotive battery rail protection, engine control unit (ECU) input protection, and body control module (BCM) power input applications requiring stable component supply, AEC-Q101 traceability, and long-term lifecycle support.
Supply support for TLD5S15AH 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, TVS diodes, and automotive-qualified components since 1979.
The TLD5SxxAH series was designed specifically for high-energy automotive load dump protection, emphasizing ultra-low thermal resistance, AEC-Q101 compliance, and DO-218AB mechanical robustness for under-hood deployment.
FAQ
What is the maximum clamping voltage of the TLD5S15AH under standard test conditions?
The TLD5S15AH has a maximum clamping voltage (VC) of 24.4 V when subjected to a 10/1000 µs peak impulse current of 148 A. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring compatibility with 24 V-rated downstream components.
Is the TLD5S15AH suitable for bidirectional transient protection?
No, the TLD5S15AH is a unidirectional TVS diode, intended only for clamping positive transients relative to ground. Its electrical specifications-including leakage current, breakdown voltage, and clamping behavior-are defined for reverse-biased operation. For bidirectional protection, a separate symmetric device such as TLD5S15AH-DUAL or paired unidirectional units would be required.
Does the TLD5S15AH meet automotive surge immunity standards?
Yes, the TLD5S15AH meets ISO 7637-2 (Load Dump Pulse 5a) and ISO 16750-2 surge requirements, validated through standardized testing with 10 ms exponential waveforms. It also complies with IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) and ISO 10605 (L4) ESD immunity, supporting full automotive EMC certification pathways.
What is the thermal resistance from junction to case (RθJC) for the TLD5S15AH?
The TLD5S15AH has a typical junction-to-case thermal resistance (RθJC) of 0.9 °C/W under ideal heatsink conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper or external heatsink, supporting continuous 5 W power dissipation and safe operation up to 175 °C junction temperature in automotive environments.
How does the temperature coefficient of VBR affect the TLD5S15AH's performance across temperature?
The TLD5S15AH exhibits a positive temperature coefficient of breakdown voltage (αT = 0.080 %/°C), meaning VBR increases linearly with junction temperature. At 175 °C, VBR rises ~12% above its 25 °C value (16.7–18.5 V), resulting in ~18.7–20.7 V. This behavior ensures consistent overvoltage threshold elevation in hot environments, improving system margin during high-temperature transients.
TLD5S15AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-218AB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 148A
- Power - Peak Pulse:
- 2800W (2.8kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
TLD5S15AH FAQ
1.How can I place an order for TLD5S15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD5S15AH 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 TLD5S15AH reliable?
The price and inventory of TLD5S15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD5S15AH is usually 5 days.
3.What payment methods are accepted for TLD5S15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD5S15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD5S15AH?
TLD5S15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD5S15AH 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 TLD5S15AH?
For technical support, including TLD5S15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD5S15AH requirements.
6.How does Aetrix verify that TLD5S15AH is sourced from the original manufacturer or authorized distributors?
All TLD5S15AH 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 TLD5S15AH meets industry standards.
7.What is the process for return or replacement of TLD5S15AH?
All TLD5S15AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD5S15AH, 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 TLD5S15AH part is unused and in its original packaging.
Return procedure for TLD5S15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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