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Taiwan Semiconductor Corporation TLD8S30CAH
- Part No.:
- TLD8S30CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD8S30CAH.pdf
- Description:
- 6600W, 35.05V, 5%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TLD8S30CAH from Taiwan Semiconductor is a bidirectional automotive-grade transient voltage suppressor in DO-218AB package, with 30.0 V working stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 5 mA, 48.4 V clamping voltage (VC) at 136 A peak impulse current, and 6600 W peak pulse power (10/1000 µs). It delivers load dump surge protection in 12 V/24 V automotive power systems.
For engineers reviewing the TLD8S30CAH datasheet, TLD8S30CAH pinout, TLD8S30CAH application, or TLD8S30CAH equivalent, key selection criteria include bidirectional polarity, ISO 7637-2/16750-2 compliance, 175 °C junction rating, DO-218AB thermal performance (RθJC = 0.8 °C/W), and leakage current ≤10 µA at VWM.
Technical Context
The TLD8S30CAH is a silicon avalanche diode designed for unidirectional or bidirectional transient suppression in harsh automotive environments. Its junction passivation optimized structure enables stable operation up to TJ = 175 °C, and it meets IEC 61000-4-2 Level 4 and ISO 10605 L4 ESD immunity requirements.
It supports both 10/1000 µs (6600 W) and 10/10000 µs (5200 W) surge waveforms per ISO 7637-2, with clamping voltage tightly controlled at 48.4 V under 136 A impulse. The device's temperature coefficient of VBR is +0.090 %/°C, enabling predictable voltage drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 33.3 / 36.8 V at IT = 5 mA - Ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | 48.4 V at 136 A (10/1000 µs) - Limits downstream voltage stress during load dump events |
| PPPM | 6600 W (10/1000 µs) - Withstands high-energy transients typical of 24 V truck load dump |
| TJ max | 175 °C - Enables placement near hot engine control units without derating |
| RθJC | 0.8 °C/W - Requires minimal heatsinking for sustained 8 W steady-state dissipation |
| IR @ VWM | ≤10 µA at 25 °C - Minimizes standby current drain in always-on vehicle modules |
Pinout & Package
Package: DO-218AB molded plastic case, UL 94V-0 rated, matte tin-plated leads, polarity marked by cathode band. Dimensions: 16.0 × 5.5 × 2.5 mm (L × W × H), weight ≈2.691 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Connected to protected line (e.g., battery rail); symmetrical conduction enables bidirectional clamping |
| Cathode | Current exit point in forward bias; marked by band on body | Provides reference for polarity-sensitive layout; defines direction of avalanche breakdown in unidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical stress test profiles |
| Bidirectional surge suppression | Clamps both positive and negative transients without external circuitry-ideal for CAN/LIN bus lines and sensor supplies |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees robustness against load dump, jump start, and alternator ripple per automotive OEM requirements |
| Junction temperature rating: −55 to +175 °C | Supports under-hood placement in ECUs, ADAS controllers, and body control modules without thermal derating |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking-reduces manufacturing overhead and moisture-related failures |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Module Supply Rail |
|---|---|
Use Scenario: Protects 24 V input of diesel ECU against load dump surges exceeding 100 V and 200 A. IC Role / Device Role / Timing Role: Primary bidirectional TVS clamp placed directly at connector entry point before DC/DC converter. Use Value: Limits voltage to ≤48.4 V during 10/1000 µs transients, preventing damage to upstream PMIC and microcontroller power rails. | Use Scenario: Shields 12 V supply of rear-view camera module from battery line transients during ignition and alternator switching. IC Role / Device Role / Timing Role: Standoff-rated TVS placed adjacent to camera power connector, operating below 30 V nominal. Use Value: Maintains <10 µA leakage at 30 V, avoiding interference with low-power image sensor biasing and analog video signal integrity. |
| Body Control Module (BCM) LIN Bus Line | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards LIN physical layer transceiver against ESD and coupled noise from nearby solenoid drivers. IC Role / Device Role / Timing Role: Bidirectional TVS connected between LIN line and ground, leveraging symmetric clamping behavior. Use Value: Meets ISO 10605 L4 (30 kV air, 15 kV contact) while adding <1 pF junction capacitance-preserving LIN signal rise time. | Use Scenario: Suppresses inductive kickback and load dump spikes on 24 V motor driver supply in EPS systems. IC Role / Device Role / Timing Role: High-power TVS mounted on heatsinked PCB area near H-bridge MOSFETs. Use Value: Delivers 6600 W peak pulse handling with RθJC = 0.8 °C/W-enabling compact thermal design without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Lower PPPM (400 W), SMA package, RθJC ≈ 45 °C/W, VBR = 33.3–37.1 V | Not suitable for load dump; limited to ESD and low-energy transients | Select TLD8S30CAH when ISO 7637-2 compliance and >6 kW surge capability are required. |
| SMCJ30CA | Same DO-214AB package, PPPM = 1500 W, VBR = 33.3–37.1 V, TJ max = 150 °C | Lacks AEC-Q101 qualification and 175 °C rating; not validated for under-hood use | Choose TLD8S30CAH for automotive under-hood deployment where extended temperature and qualification are mandatory. |
Compared with SMAJ30CA and SMCJ30CA, the TLD8S30CAH provides 4.4× higher peak pulse power, 25 °C higher junction temperature rating, AEC-Q101 qualification, and DO-218AB package with superior thermal resistance-making it the only option qualified for full automotive load dump protection in demanding powertrain and chassis systems.
Availability
TLD8S30CAH is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and electric power steering systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for TLD8S30CAH 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in power discrete devices, TVS diodes, and automotive-qualified components since 1979.
The TLD8SxxAH/CAH series was developed specifically for automotive load dump and ISO 7637-2 transient suppression, targeting under-hood ECUs, body electronics, and safety-critical power systems requiring AEC-Q101 validation and 175 °C operation.
FAQ
What is the polarity configuration of the TLD8S30CAH?
The TLD8S30CAH is a bidirectional transient voltage suppressor, meaning it clamps voltage transients in both positive and negative directions relative to ground. Its marking code "TLD8S30A" and "CAH" suffix confirm bidirectional functionality, unlike the "AH"-suffixed unidirectional variants. This allows single-device protection of differential or AC-coupled lines such as LIN or sensor interfaces without polarity concerns.
Does the TLD8S30CAH meet AEC-Q101 stress test requirements?
Yes, the TLD8S30CAH is explicitly AEC-Q101 qualified per the manufacturer's documentation. It has passed temperature cycling, highly accelerated stress testing (HAST), mechanical shock, vibration, and solderability tests defined in the AEC-Q101 standard, confirming suitability for automotive under-hood and chassis applications where reliability is critical.
What is the maximum clamping voltage of the TLD8S30CAH under surge conditions?
The TLD8S30CAH has a maximum clamping voltage (VC) of 48.4 V when subjected to a 10/1000 µs waveform at its peak impulse current of 136 A. This value is measured per standard test conditions and ensures downstream ICs and regulators remain within safe operating voltage limits during severe load dump events in 24 V vehicle systems.
Can the TLD8S30CAH be used in 12 V automotive systems?
Yes, the TLD8S30CAH is compatible with 12 V automotive systems. Its 30.0 V working stand-off voltage (VWM) provides sufficient margin above the 13.5–14.8 V nominal charging voltage, while its 48.4 V clamping voltage remains well below the absolute maximum ratings of most 12 V-rated power management ICs and microcontrollers.
What is the thermal resistance from junction to case (RθJC) for the TLD8S30CAH?
The TLD8S30CAH has a typical junction-to-case thermal resistance (RθJC) of 0.8 °C/W, measured with an ideal heatsink. This low value enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink, supporting sustained 8 W steady-state power dissipation and high-reliability operation in thermally constrained automotive modules.
TLD8S30CAH 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 136A
- 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
TLD8S30CAH FAQ
1.How can I place an order for TLD8S30CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD8S30CAH 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 TLD8S30CAH reliable?
The price and inventory of TLD8S30CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S30CAH is usually 5 days.
3.What payment methods are accepted for TLD8S30CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S30CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD8S30CAH?
TLD8S30CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD8S30CAH 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 TLD8S30CAH?
For technical support, including TLD8S30CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S30CAH requirements.
6.How does Aetrix verify that TLD8S30CAH is sourced from the original manufacturer or authorized distributors?
All TLD8S30CAH 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 TLD8S30CAH meets industry standards.
7.What is the process for return or replacement of TLD8S30CAH?
All TLD8S30CAH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S30CAH, 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 TLD8S30CAH part is unused and in its original packaging.
Return procedure for TLD8S30CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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