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Taiwan Semiconductor Corporation TLD8S11CAH
- Part No.:
- TLD8S11CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD8S11CAH.pdf
- Description:
- 6600W, 12.85V, 5%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,078
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Product details
Overview
TLD8S11CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-218AB package, rated for 11.0 V working stand-off voltage, 12.2–13.5 V breakdown voltage at 5 mA, 18.2 V clamping voltage at 150 A (10/1000 µs), and 6600 W peak pulse power. It delivers automotive-grade surge protection for 12 V/24 V battery rail systems.
For engineers reviewing the TLD8S11CAH datasheet, TLD8S11CAH pinout, TLD8S11CAH application, or TLD8S11CAH equivalent, key selection criteria include unidirectional vs. bidirectional configuration, ISO 7637-2 load dump compliance, TJ = 175 °C operation, and DO-218AB thermal performance with RθJC = 0.8 °C/W.
Technical Context
The TLD8S11CAH is a bidirectional avalanche diode optimized for high-energy transients in automotive power networks. Its junction passivation design enables stable operation up to TJ = 175 °C, and it meets ISO 7637-2 (load dump), ISO 16750-2 (surge), and IEC 61000-4-2 Level 4 requirements.
It features low clamping ratio (VC/VBR ≈ 1.42), temperature coefficient of VBR = 0.072 %/°C, and 10 µA max leakage at VWM - critical for low-power always-on circuits. The DO-218AB package supports high thermal dissipation with 0.8 °C/W junction-to-case resistance under ideal heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.0 V - Maximum continuous reverse operating voltage before significant leakage begins; sets system overvoltage trip threshold. |
| VBR (min/max) | 12.2 / 13.5 V at IT = 5 mA - Confirmed avalanche onset range; ensures predictable turn-on during surges. |
| VC @ IPPM | 18.2 V at 150 A (10/1000 µs) - Clamped voltage seen by protected circuit; limits downstream stress during load dump events. |
| PPPM (10/1000 µs) | 6600 W - Peak surge energy handling capacity; supports ISO 7637-2 Pulse 5a (load dump) without failure. |
| TJ max | 175 °C - Enables under-hood deployment in engine control units and body electronics without derating. |
| RθJC | 0.8 °C/W - Enables efficient heat transfer to PCB copper or heatsink; supports sustained 8 W steady-state dissipation. |
Pinout & Package
DO-218AB surface-mount package: molded plastic case meeting UL 94V-0, matte tin-plated leads, polarity marked by cathode band, weight ≈ 2.691 g. Designed for high-current PCB mounting with thermal pad exposure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Reference terminal for bidirectional conduction | Both terminals symmetrically conduct in reverse bias; no fixed anode/cathode - functions as symmetrical clamp across supply rails. |
| Cathode (Marked Band) | Reference terminal for bidirectional conduction | Same electrical role as Anode; marking indicates orientation only - device clamps equally in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TC, UHAST, and ESD - eliminates qualification burden for Tier 1 suppliers. |
| Bidirectional architecture | Clamps positive and negative transients equally - protects AC-coupled lines or dual-polarity rails without external polarity management. |
| ISO 7637-2 & ISO 16750-2 compliance | Passes Pulse 5a (load dump) and Pulse 1/2/3a/b - certified for direct integration into vehicle power distribution modules. |
| Junction passivation technology | Stable leakage and VBR over lifetime at TJ = 175 °C - prevents parameter drift in high-temp engine bay environments. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Protection |
|---|---|
Use Scenario: Protects 12 V input rail of engine ECU against alternator load dump surges up to 35 V and 400 ms duration. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC/DC converter and microcontroller power supply. Use Value: Limits rail voltage to ≤18.2 V during 150 A transients, preventing damage to 20 V-rated LDOs and MCU IOs. | Use Scenario: Shields CAN transceiver PHY layer from coupled surges on vehicle chassis ground during ignition switching. IC Role / Device Role / Timing Role: Bidirectional rail-to-rail clamp between CAN_H/CAN_L differential pair and chassis ground. Use Value: Maintains signal integrity by clamping common-mode transients without distorting differential data waveform. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Secures 12 V input to image sensor and ISP in front-facing ADAS camera exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: First-line transient suppressor before buck converter and low-noise LDOs powering CMOS image sensor. Use Value: Ensures <10 µA leakage at 11 V stand-off, preserving sleep-mode current budget while surviving 175 °C junction temperature. | Use Scenario: Guards gate driver IC supply against inductive kickback from 3-phase BLDC motor windings during PWM commutation. IC Role / Device Role / Timing Role: High-power TVS placed across motor driver's VDD and GND pins to absorb repetitive 6600 W pulses. Use Value: Withstands >100,000 load dump cycles per ISO 16750-2 without degradation due to junction passivation stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11CA | Lower PPPM (400 W), DO-214AC package, RθJC ≈ 50 °C/W | Not suitable for ISO 7637-2 load dump; limited to low-energy ESD/surge events | Select only for non-automotive, low-power applications where 6600 W capability is unnecessary. |
| SMCJ11CA | Same DO-214AB package, PPPM = 1500 W, VBR = 12.2–13.5 V, RθJC ≈ 3.5 °C/W | Meets IEC 61000-4-2 but fails ISO 7637-2 Pulse 5a; insufficient for alternator load dump | Acceptable for industrial control panels with moderate surge exposure, but not for automotive power rails. |
Compared with SMAJ11CA and SMCJ11CA, the TLD8S11CAH uniquely combines AEC-Q101 qualification, 6600 W surge rating, and 0.8 °C/W thermal resistance - enabling direct placement on high-current automotive power inputs without external heatsinking.
Availability
TLD8S11CAH is available at Aetrix Electronics and suitable for automotive power rail protection, ADAS camera modules, and electric power steering systems requiring stable component supply across extended temperature and lifecycle demands.
Supply support for TLD8S11CAH 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 TLD8SxxCAH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability automotive power line protection with emphasis on load dump immunity, high-temperature operation, and robust packaging.
FAQ
What is the maximum clamping voltage of the TLD8S11CAH during a 150 A transient?
The TLD8S11CAH clamps to a maximum of 18.2 V when subjected to a 150 A peak impulse current with a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized load dump testing. The TLD8S11CAH maintains this clamping performance across its full operating temperature range.
Is the TLD8S11CAH unidirectional or bidirectional?
The TLD8S11CAH is a bidirectional TVS diode, as indicated by the "CA" suffix in its part number and confirmed in the electrical specifications table. It provides symmetrical clamping for both positive and negative transients, making it suitable for protecting differential lines or AC-coupled signals without polarity constraints. This differs from the "AH"-suffixed unidirectional variants in the same family.
Does the TLD8S11CAH meet AEC-Q101 reliability standards?
Yes, the TLD8S11CAH is explicitly qualified to AEC-Q101 standards, as stated in the FEATURES section of its datasheet. This includes passing stress tests such as high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model electrostatic discharge (HBM ESD). The TLD8S11CAH is approved for automotive under-hood and cabin applications.
What is the thermal resistance from junction to case for the TLD8S11CAH?
The junction-to-case thermal resistance (RθJC) of the TLD8S11CAH is 0.8 °C/W, measured under ideal heatsink conditions. This low value reflects the DO-218AB package's enhanced thermal path and enables effective heat removal from the silicon die during high-power transient events. The TLD8S11CAH leverages this to sustain 6600 W pulses without exceeding TJ = 175 °C.
Which international surge standards does the TLD8S11CAH comply with?
The TLD8S11CAH complies with ISO 7637-2 (Pulse 5a load dump), ISO 16750-2 (electrical load dump and surge), and IEC 61000-4-2 Level 4 (ESD immunity). These certifications are documented in the FEATURES section and validated through standardized test waveforms. Compliance is inherent to the TLD8S11CAH design and does not require external components or layout modifications.
TLD8S11CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 363A
- 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
TLD8S11CAH FAQ
1.How can I place an order for TLD8S11CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD8S11CAH 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 TLD8S11CAH reliable?
The price and inventory of TLD8S11CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S11CAH is usually 5 days.
3.What payment methods are accepted for TLD8S11CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S11CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD8S11CAH?
TLD8S11CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD8S11CAH 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 TLD8S11CAH?
For technical support, including TLD8S11CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S11CAH requirements.
6.How does Aetrix verify that TLD8S11CAH is sourced from the original manufacturer or authorized distributors?
All TLD8S11CAH 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 TLD8S11CAH meets industry standards.
7.What is the process for return or replacement of TLD8S11CAH?
All TLD8S11CAH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S11CAH, 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 TLD8S11CAH part is unused and in its original packaging.
Return procedure for TLD8S11CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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