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Taiwan Semiconductor Corporation TLD8S15AH
- Part No.:
- TLD8S15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD8S15AH.pdf
- Description:
- 6600W, 17.6V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,030
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Product details
Overview
TLD8S15AH from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode in DO-218AB package, rated for 15 V working stand-off voltage, 16.7–18.5 V breakdown voltage at 5 mA, 270 A peak impulse current (10/1000 μs), 24.4 V clamping voltage, and 6600 W peak pulse power-designed for automotive load dump surge protection in engine control units.
For engineers reviewing the TLD8S15AH datasheet, TLD8S15AH pinout, TLD8S15AH application, or TLD8S15AH equivalent, key selection criteria include clamping voltage margin vs. system rail, junction temperature derating above 25°C, compliance with ISO 7637-2 Pulse 5a/b, and thermal resistance (0.8 °C/W) under heatsinked mounting conditions.
Technical Context
The TLD8S15AH employs junction passivation optimized design technology to sustain 175 °C junction temperature operation, meeting AEC-Q101 qualification for automotive reliability. Its unidirectional configuration provides reverse-biased surge clamping only, with forward voltage ≤1.8 V at 100 A.
It delivers 6600 W non-repetitive peak impulse power under 10/1000 μs waveform and 5200 W under 10/10000 μs waveform, with thermal performance validated using ideal heatsink conditions yielding RθJC = 0.8 °C/W.
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 V / 18.5 V at 5 mA - ensures reliable turn-on during transients while avoiding false triggering |
| VC at IPPM | 24.4 V at 270 A - defines worst-case rail overvoltage seen by protected downstream ICs |
| PPPM (10/1000 µs) | 6600 W - supports high-energy load dump events per ISO 7637-2 without failure |
| RθJC | 0.8 °C/W - enables thermal management with external heatsink for sustained surge duty cycles |
| TJ max | +175 °C - allows operation in under-hood environments including near exhaust manifolds |
| αT | 0.080 %/°C - quantifies VBR drift with temperature for accurate clamping margin calculation |
Pinout & Package
Package: DO-218AB surface-mount molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity marked by cathode band, weight ≈2.691 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-side return; conducts during forward surge (e.g., reverse battery) |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 12 V rail); clamps transients above VWM to VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across temperature cycling, humidity, and mechanical shock |
| ISO 7637-2 & ISO 16750-2 compliant | Guarantees survivability against standardized automotive load dump and supply interruption transients |
| Junction temperature rating up to +175 °C | Enables placement in high-ambient zones such as power distribution modules near engines |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates bake requirements prior to reflow, reducing manufacturing cost and risk of popcorning |
| Halogen-free & RoHS compliant | Meets global environmental regulations and supports lead-free assembly processes |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Protection |
|---|---|
Use Scenario: Protects microcontroller and CAN transceiver power rails from load dump surges during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-polarity and high-voltage transients on 12 V main input. Use Value: Limits clamped voltage to 24.4 V, staying below absolute maximum ratings of 28 V tolerant automotive ICs. | Use Scenario: Shields LIN bus interface and power management ICs from battery line transients during jump-start or relay switching. IC Role / Device Role / Timing Role: Fast-response TVS absorbs 10/1000 µs pulses up to 270 A without degradation. Use Value: 6600 W peak power rating ensures single-event survivability per ISO 7637-2 Pulse 5a (12 V systems). |
| Advanced Driver Assistance Systems (ADAS) Camera Power Supply | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Guards image sensor and serializer ICs powered from vehicle battery against ignition-induced spikes. IC Role / Device Role / Timing Role: Standoff voltage (15 V) accommodates nominal 13.5 V charging while blocking leakage below 10 µA. Use Value: Low 0.080 %/°C tempco maintains clamping accuracy across -40 °C to +125 °C ambient range. | Use Scenario: Safeguards H-bridge gate drivers and current sense amplifiers from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: Unidirectional configuration prevents forward conduction during normal operation but clamps negative transients. Use Value: 1.8 V forward voltage at 100 A ensures minimal insertion loss during reverse-battery fault conditions. |
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 | Lower PPPM (400 W), DO-214AC package, VC = 24.4 V at 23.3 A | Rated for consumer/industrial use only; not AEC-Q101 qualified or ISO 7637-2 tested | Select when automotive qualification is unnecessary and surge energy is limited to <100 mJ |
| TPSMD15A | Same DO-218AB package, AEC-Q101 qualified, PPPM = 6600 W, VC = 24.4 V at 270 A, but VBR = 16.7–18.5 V matches TLD8S15AH exactly | Identical electrical specs and qualification; differs only in manufacturer branding and traceability documentation | Drop-in alternative with identical thermal and surge performance; preferred for dual-sourcing programs |
Compared with SMAJ15A and TPSMD15A, the TLD8S15AH offers automotive-grade reliability and full ISO 7637-2 compliance out-of-the-box, while matching TPSMD15A's surge capability and clamping behavior-making it suitable for safety-critical ECU designs where qualification evidence and test report traceability are mandatory.
Availability
TLD8S15AH is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for TLD8S15AH 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 rectifiers for automotive and industrial markets.
The TLD8SxxAH series was developed specifically to meet stringent automotive surge immunity standards-including ISO 7637-2, ISO 16750-2, and AEC-Q101-with optimized thermal design for under-hood deployment.
FAQ
What is the clamping voltage of the TLD8S15AH and how is it measured?
The TLD8S15AH has a maximum clamping voltage (VC) of 24.4 V at 270 A peak impulse current with a 10/1000 μs waveform. This value is measured per JEDEC standard test conditions at TA = 25 °C, using a pulsed current source that replicates automotive load dump transients. The TLD8S15AH maintains this clamping performance across its full operating temperature range due to its 0.080 %/°C VBR temperature coefficient.
Is the TLD8S15AH suitable for bidirectional surge protection?
No, the TLD8S15AH is a unidirectional TVS diode intended for reverse-biased clamping only. For bidirectional protection, Taiwan Semiconductor offers the TLD8S15CAH variant, which features symmetrical breakdown in both polarities. Using TLD8S15AH in bidirectional applications risks failure during positive-going transients, as it lacks forward surge capability beyond its 1.8 V forward voltage rating at 100 A.
Does the TLD8S15AH require a heatsink for standard automotive operation?
The TLD8S15AH achieves RθJC = 0.8 °C/W with an ideal heatsink, but for single-pulse load dump events (e.g., ISO 7637-2 Pulse 5a), no external heatsink is required due to its short-duration energy absorption. However, in applications with repetitive surges or elevated ambient temperatures (>105 °C), a copper pour or thermal pad is recommended to maintain junction temperature below 175 °C. The TLD8S15AH's DO-218AB package supports direct PCB thermal coupling via the cathode terminal.
How does the TLD8S15AH compare to standard SMAJ-series TVS diodes in automotive use?
The TLD8S15AH delivers 16.5× higher peak pulse power (6600 W vs. 400 W for SMAJ15A) and is AEC-Q101 qualified with documented ISO 7637-2 test reports-unlike generic SMAJ parts. Its DO-218AB package also provides lower thermal resistance than DO-214AC. While SMAJ15A may function in low-energy lab prototypes, the TLD8S15AH is engineered for production automotive systems where regulatory compliance and field reliability are mandatory.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of the TLD8S15AH?
The TLD8S15AH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and can be stored indefinitely at ambient conditions without dry packing or baking. It is fully compatible with standard lead-free reflow profiles (J-STD-020D), including peak temperatures up to 260 °C, and meets JESD201 Class 2 whisker resistance requirements for long-term solder joint integrity.
TLD8S15AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-218AB
- Series:
- TLD8S
- 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):
- 270A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
TLD8S15AH FAQ
1.How can I place an order for TLD8S15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD8S15AH 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 TLD8S15AH reliable?
The price and inventory of TLD8S15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S15AH is usually 5 days.
3.What payment methods are accepted for TLD8S15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD8S15AH?
TLD8S15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD8S15AH 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 TLD8S15AH?
For technical support, including TLD8S15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S15AH requirements.
6.How does Aetrix verify that TLD8S15AH is sourced from the original manufacturer or authorized distributors?
All TLD8S15AH 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 TLD8S15AH meets industry standards.
7.What is the process for return or replacement of TLD8S15AH?
All TLD8S15AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S15AH, 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 TLD8S15AH part is unused and in its original packaging.
Return procedure for TLD8S15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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