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Taiwan Semiconductor Corporation TLD6S43AH
- Part No.:
- TLD6S43AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD6S43AH.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,325
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Product details
Overview
TLD6S43AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive load dump surge protection, with a 43 V working stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 5 mA, 66 A peak pulse current (IPPM) under 10/1000 µs waveform, and 4600 W peak pulse power (PPPM). It operates from −55 °C to +175 °C and meets ISO 7637-2, ISO 16750-2, IEC 61000-4-2 Level 4, and AEC-Q101 requirements.
For engineers reviewing the TLD6S43AH datasheet, TLD6S43AH pinout, TLD6S43AH application, or TLD6S43AH equivalent, key selection criteria include its DO-218AB package, unidirectional polarity, 69.4 V clamping voltage at IPPM, junction-to-case thermal resistance of 0.85 °C/W, and suitability for high-energy transients in 12 V/24 V automotive power networks.
Technical Context
The TLD6S43AH implements a single-die silicon avalanche structure optimized for high-reliability automotive environments, featuring junction passivation and UL 94V-0 molding compound. Its unidirectional configuration enables robust reverse-biased transient clamping without forward conduction during normal operation.
It delivers 4600 W non-repetitive peak impulse power with 10/1000 µs waveform and sustains 3600 W with 10/10000 µs waveform-critical for ISO 7637-2 Load Dump Pulse 5a compliance. Thermal performance is validated up to TJ = 175 °C, supported by RθJC = 0.85 °C/W under ideal heatsink conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines system-level stand-off margin in 24 V automotive networks. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 5 mA - Confirmed breakdown range ensures reliable triggering above nominal bus voltage with process tolerance. |
| VC at IPPM | 69.4 V - Clamping voltage at 66 A peak pulse current; determines maximum voltage seen by protected downstream ICs. |
| PPPM (10/1000 µs) | 4600 W - Peak pulse power handling capacity; validates compliance with ISO 7637-2 Pulse 5a high-energy load dump events. |
| TJ max | +175 °C - Maximum junction temperature rating; enables deployment in under-hood ECUs without derating in high-ambient environments. |
| RθJC | 0.85 °C/W - Junction-to-case thermal resistance; supports thermal design with external heatsinking for sustained surge duty cycles. |
| IR at VWM (TJ = 25°C) | 10 µA - Low reverse leakage at rated stand-off voltage; minimizes quiescent power loss in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - Surface-mount, unidirectional TVS diode with matte tin-plated leads, UL 94V-0 flammability rating, JESD 201 Class 2 whisker resistance, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-side reference; conducts only during forward surge or fault conditions. |
| Cathode | Transient clamping node | Connected to protected line (e.g., battery rail); sinks surge current into ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including temperature cycling, humidity bias, and mechanical shock per AEC standard. |
| Junction passivation technology | Enhanced long-term stability of VBR and leakage under high-temperature bias stress in engine bay applications. |
| ISO 7637-2 & ISO 16750-2 compliance | Guaranteed suppression of standardized load dump and supply voltage variation transients without failure. |
| 175 °C junction capability | Enables placement in high-ambient zones (e.g., near powertrain control units) without thermal derating penalties. |
| DO-218AB mechanical robustness | UL 94V-0 compound and JESD 201 Class 2 whisker resistance ensure solder joint integrity across automotive lifecycle. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Protection |
|---|---|
Use Scenario: Protects microcontroller power rails against load dump surges during alternator disconnection in gasoline/diesel vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-polarity transients on 12 V/24 V battery feed lines upstream of DC-DC converters. Use Value: Limits peak clamped voltage to 69.4 V, preventing overvoltage damage to 75 V-rated input stages of PMICs and regulators. | Use Scenario: Shields LIN/CAN transceivers and power switches from ISO 16750-2 supply voltage spikes during cold cranking and jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs repetitive low-energy transients while maintaining <10 µA leakage at 43 V nominal bus. Use Value: Enables stable operation of 5 V/3.3 V logic supplies without brownout or latch-up during 100 ms, 25 V overshoot events. |
| ADAS Camera Power Supply Protection | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Safeguards image sensor and ISP power inputs against coupled transients from adjacent high-current actuators in ADAS domain controllers. IC Role / Device Role / Timing Role: Fast-response avalanche diode clamps sub-microsecond ESD and switching noise before it couples into analog video paths. Use Value: Maintains signal integrity with <0.093 %/°C VBR temperature coefficient, minimizing drift-induced false triggers across −40 °C to +125 °C ambient. | Use Scenario: Absorbs regenerative energy spikes during motor deceleration and PWM switching in 24 V EPS systems. IC Role / Device Role / Timing Role: High-power TVS shunts 66 A peak currents (10/1000 µs) away from gate drivers and H-bridge MOSFETs. Use Value: Delivers 4600 W peak pulse power handling-exceeding ISO 7637-2 Pulse 5a requirement-without thermal runaway at TJ = 175 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Lower PPPM (400 W vs. 4600 W), SMA package (smaller footprint, higher RθJA), VBR = 47.8–52.8 V same range. | Not suitable for load dump; limited to ESD/low-energy transients in infotainment or sensor interfaces. | Select SMAJ43A only for space-constrained, low-surge applications where 4600 W capability is unnecessary. |
| SMCJ43A | Same DO-214AB package, 4600 W PPPM, but lower TJ max (150 °C vs. 175 °C) and no AEC-Q101 qualification. | Lacks automotive qualification and high-temperature endurance; acceptable for industrial power supplies but not under-hood ECUs. | Choose SMCJ43A for cost-sensitive industrial designs where AEC-Q101 and 175 °C operation are not required. |
Compared with SMAJ43A and SMCJ43A, the TLD6S43AH uniquely combines AEC-Q101 qualification, 175 °C junction rating, and DO-218AB package thermal performance-making it the only option qualified for high-energy, high-temperature automotive load dump protection.
Availability
TLD6S43AH is available at Aetrix Electronics and suitable for automotive ECU power protection, body control module surge suppression, ADAS camera supply hardening, and electric power steering motor driver safeguarding requiring stable component supply across extended production lifecycles.
Supply support for TLD6S43AH 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 with global distribution and AEC-Q101 validation infrastructure.
The TLD6SxxAH series is engineered specifically for high-energy automotive transient suppression, targeting load dump, jump-start, and ISO 16750-2 compliant protection in engine control, chassis, and ADAS subsystems.
FAQ
What is the clamping voltage of the TLD6S43AH at its rated peak pulse current?
The TLD6S43AH has a maximum clamping voltage (VC) of 69.4 V at its specified peak pulse current (IPPM) of 66 A under a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The TLD6S43AH maintains this clamping performance across its full operating temperature range, supporting robust design margins in automotive power networks.
Is the TLD6S43AH qualified for automotive use per AEC-Q101 standards?
Yes, the TLD6S43AH is explicitly AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and humidity bias, ensuring reliability in automotive under-hood environments. The TLD6S43AH's 175 °C maximum junction temperature rating and ISO 7637-2 compliance further validate its suitability for automotive applications.
What package type does the TLD6S43AH use, and what are its key mechanical attributes?
The TLD6S43AH uses the DO-218AB surface-mount package, featuring matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability rating, and JESD 201 Class 2 whisker resistance. Its unidirectional polarity is marked by a cathode band, and it weighs approximately 2.682 g. The DO-218AB footprint provides superior thermal dissipation compared to smaller packages like SMA or SMB, supporting the TLD6S43AH's 4600 W pulse power rating.
How does the TLD6S43AH's thermal performance compare to similar TVS diodes?
The TLD6S43AH achieves a junction-to-case thermal resistance (RθJC) of 0.85 °C/W under ideal heatsink conditions-significantly lower than typical SMA or SMC packages. This enables more efficient heat transfer during repetitive surge events and supports sustained operation at TJ = 175 °C. Unlike many alternatives, the TLD6S43AH's DO-218AB package and internal die construction are optimized for thermal management in high-power automotive transients.
Does the TLD6S43AH meet international surge immunity standards such as ISO 7637-2 and IEC 61000-4-2?
Yes, the TLD6S43AH meets ISO 7637-2 (Load Dump Pulse 5a), ISO 16750-2 (supply voltage variations), and IEC 61000-4-2 Level 4 (ESD) per its datasheet specifications. These certifications are verified through standardized test waveforms and environmental conditions. The TLD6S43AH's 4600 W peak pulse power rating directly supports compliance with the most demanding ISO 7637-2 requirements, making it suitable for front-end protection in automotive power distribution systems.
TLD6S43AH 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 66A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
TLD6S43AH FAQ
1.How can I place an order for TLD6S43AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD6S43AH 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 TLD6S43AH reliable?
The price and inventory of TLD6S43AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD6S43AH is usually 5 days.
3.What payment methods are accepted for TLD6S43AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD6S43AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD6S43AH?
TLD6S43AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD6S43AH 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 TLD6S43AH?
For technical support, including TLD6S43AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD6S43AH requirements.
6.How does Aetrix verify that TLD6S43AH is sourced from the original manufacturer or authorized distributors?
All TLD6S43AH 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 TLD6S43AH meets industry standards.
7.What is the process for return or replacement of TLD6S43AH?
All TLD6S43AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD6S43AH, 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 TLD6S43AH part is unused and in its original packaging.
Return procedure for TLD6S43AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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