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Taiwan Semiconductor Corporation TLD6S26AH
- Part No.:
- TLD6S26AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD6S26AH.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,502
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Product details
Overview
TLD6S26AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-218AB package, rated for 26.0 V working stand-off voltage, 28.9–31.9 V breakdown voltage at 5.0 mA, and 42.1 V clamping voltage at 106 A peak pulse current (10/1000 μs). It delivers 4600 W peak pulse power and supports automotive load dump protection up to TJ = 175 °C.
For engineers reviewing the TLD6S26AH datasheet, TLD6S26AH pinout, TLD6S26AH application, or TLD6S26AH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2/ISO 16750-2 compliance, unidirectional polarity, 0.85 °C/W junction-to-case thermal resistance, and DO-218AB mechanical compatibility with high-power automotive PCB layouts.
Technical Context
The TLD6S26AH is engineered as a single-die, unidirectional TVS diode optimized for high-energy transients in 12 V/24 V automotive electrical systems. Its junction passivation design enables stable operation up to 175 °C junction temperature and meets stringent automotive surge standards including ISO 7637-2 (load dump), ISO 16750-2 (supply voltage variation), and IEC 61000-4-2 Level 4.
It features a low clamping ratio (VC/VBR ≈ 1.37) and tight VBR tolerance (±5.2% at 25 °C), with temperature coefficient of 0.088 %/°C. The device sustains 600 A peak forward surge current (8.3 ms half-sine) and exhibits 1.9 V maximum forward voltage at 100 A, supporting robust bidirectional surge handling in protected DC lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bus hold-off level. |
| VBR (min/max) | 28.9 V / 31.9 V at 5.0 mA - Confirmed breakdown threshold range; ensures reliable triggering across production lot and temperature. |
| VC @ IPPM | 42.1 V at 106 A (10/1000 μs) - Clamped voltage during worst-case load dump; limits downstream IC stress to ≤42.1 V. |
| PPPM (10/1000 μs) | 4600 W - Peak surge power handling capacity; supports full ISO 7637-2 Pulse 5a (load dump) without failure. |
| TJ max | 175 °C - Maximum junction temperature rating; enables under-hood deployment without derating in engine control units. |
| RθJC | 0.85 °C/W - Junction-to-case thermal resistance with ideal heatsink; allows accurate thermal modeling for board-level heat dissipation. |
| IR @ VWM | 10 µA at 25 °C - Low leakage current ensures minimal standby power loss in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - Surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated, JESD 201 Class 2 whisker compliant, polarity-marked cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional TVS configuration | Connected to ground or low-impedance return path; carries full surge current during clamping. |
| Cathode | High-side connection; marked by band on package | Connected to protected line (e.g., battery rail); defines directionality and clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across temperature, humidity, and mechanical stress testing per JEDEC standards. |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees functional survival during standardized automotive load dump and supply surge events without parameter shift. |
| 175 °C junction capability | Enables direct placement near high-heat sources (e.g., power converters, motor drivers) without thermal derating. |
| 0.85 °C/W RθJC | Supports >5 W steady-state dissipation with modest heatsinking-critical for sustained surge recovery in ADAS ECUs. |
| Uni-directional polarity | Prevents unintended conduction during normal positive-bias operation while enabling precise overvoltage clamping. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Protection |
|---|---|
Use Scenario: Protects 12 V supply input of engine ECU against ISO 7637-2 Pulse 5a load dump surges up to 120 V and 400 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed directly at connector entry point to limit transient voltage before it reaches LDOs and microcontrollers. Use Value: Limits clamped voltage to 42.1 V, preventing damage to 45 V-rated power management ICs and ensuring system reset-free operation after surge. | Use Scenario: Shields BCM's main 12 V rail from alternator-induced transients during battery disconnection or regulator fault conditions. IC Role / Device Role / Timing Role: Primary surge suppression device mounted adjacent to fuse box interface, absorbing energy before distribution to CAN transceivers and driver ICs. Use Value: Withstands 4600 W peak pulse power and maintains <10 µA leakage at 26 V, preserving sleep-mode current budget in always-on modules. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Line | Electric Power Steering (EPS) Motor Driver Supply Protection |
Use Scenario: Secures 12 V power feed to rear-view or surround-view cameras exposed to harsh under-vehicle environments. IC Role / Device Role / Timing Role: First-line transient guard on camera module PCB, placed upstream of DC-DC converter and image sensor power rails. Use Value: 175 °C TJ rating and AEC-Q101 qualification ensure uninterrupted operation in high-temperature mounting locations (e.g., bumper, fender). | Use Scenario: Protects high-current 12 V supply feeding EPS motor gate drivers and current sense amplifiers during steering actuation surges. IC Role / Device Role / Timing Role: High-power TVS positioned between battery input and H-bridge power stage to clamp inductive kickback and load dump simultaneously. Use Value: 600 A IFSM rating and 1.9 V VF at 100 A enable safe conduction of forward surge currents without thermal runaway or bond wire failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Lower PPPM (400 W), SMA package (RθJC ≈ 50 °C/W), VBR = 28.9–31.9 V same range | Not AEC-Q101 qualified; limited to non-automotive industrial use; unsuitable for ISO 7637-2 Pulse 5a | Select only for cost-sensitive, low-energy, non-automotive designs where 4600 W surge immunity is not required. |
| SMCJ26A | Same DO-214AB package, PPPM = 1500 W, VBR = 28.9–31.9 V, RθJC ≈ 3.5 °C/W, AEC-Q101 optional | Lacks guaranteed 4600 W rating and 175 °C TJ; requires derating above 125 °C ambient | Consider when footprint compatibility is critical but full load dump immunity is not mandated by system specification. |
Compared with SMAJ26A and SMCJ26A, the TLD6S26AH delivers 3× higher peak power handling, superior thermal performance (0.85 vs. ≥3.5 °C/W), and mandatory AEC-Q101 qualification-making it the only choice for OEM-compliant automotive load dump protection where reliability and standard compliance are non-negotiable.
Availability
TLD6S26AH is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for TLD6S26AH 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 discrete power devices, TVS diodes, and automotive-qualified components with global AEC-Q101 certification infrastructure.
The TLD6SxxAH series was developed specifically for high-reliability automotive transient suppression, targeting ISO 7637-2 load dump and ISO 16750-2 surge immunity in next-generation E/E architectures.
FAQ
What is the clamping voltage of the TLD6S26AH at its rated peak pulse current?
The TLD6S26AH has a maximum clamping voltage (VC) of 42.1 V at 106 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and ensures downstream circuitry remains within safe voltage limits during automotive load dump events. The TLD6S26AH maintains this clamping performance across its full operating temperature range and lifetime.
Is the TLD6S26AH qualified for automotive applications?
Yes, the TLD6S26AH is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 (Pulse 5a load dump), ISO 16750-2 (electrical load variations), and IEC 61000-4-2 Level 4 ESD requirements. Its 175 °C maximum junction temperature and DO-218AB package construction further validate its suitability for under-hood and safety-critical vehicle systems.
What is the marking code for the TLD6S26AH?
The marking code for the TLD6S26AH is "TLD6S26A", as specified in the ordering information table and electrical specifications section. This two-line marking appears on the device body alongside date and factory codes, and is used for visual identification and traceability during assembly and inspection of the TLD6S26AH.
Does the TLD6S26AH have unidirectional or bidirectional polarity?
The TLD6S26AH is a unidirectional TVS diode, as confirmed by polarity designation in the Mechanical Data section and schematic symbol usage in application diagrams. Its cathode is marked with a band on the DO-218AB package, and it conducts only during reverse-biased overvoltage events-making it ideal for protecting positive-rail DC systems like automotive battery feeds.
What packaging option is available for the TLD6S26AH?
The TLD6S26AH is supplied in 750-piece tape-and-reel packaging per the Ordering Information table. This format supports automated SMT placement and is compatible with standard pick-and-place equipment. The DO-218AB package dimensions and suggested pad layout are documented in the Package Outline Dimensions section of the official datasheet for the TLD6S26AH.
TLD6S26AH 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 106A
- 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
TLD6S26AH FAQ
1.How can I place an order for TLD6S26AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD6S26AH 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 TLD6S26AH reliable?
The price and inventory of TLD6S26AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD6S26AH is usually 5 days.
3.What payment methods are accepted for TLD6S26AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD6S26AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD6S26AH?
TLD6S26AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD6S26AH 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 TLD6S26AH?
For technical support, including TLD6S26AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD6S26AH requirements.
6.How does Aetrix verify that TLD6S26AH is sourced from the original manufacturer or authorized distributors?
All TLD6S26AH 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 TLD6S26AH meets industry standards.
7.What is the process for return or replacement of TLD6S26AH?
All TLD6S26AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD6S26AH, 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 TLD6S26AH part is unused and in its original packaging.
Return procedure for TLD6S26AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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