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Taiwan Semiconductor Corporation TLD6S20AH
- Part No.:
- TLD6S20AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD6S20AH.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:748
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Product details
Overview
TLD6S20AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-218AB package, rated for 20.0 V working stand-off voltage, 22.2–24.5 V breakdown voltage at 5.0 mA, and 4600 W peak pulse power (10/1000 μs), designed for automotive load dump surge protection in 12 V/24 V systems.
For engineers reviewing the TLD6S20AH datasheet, TLD6S20AH pinout, TLD6S20AH application, or TLD6S20AH equivalent, key selection criteria include clamping voltage (32.4 V at 142 A), junction temperature capability (−55 °C to +175 °C), ISO 7637-2 compliance, AEC-Q101 qualification, and DO-218AB thermal performance (RθJC = 0.85 °C/W).
Technical Context
The TLD6S20AH implements a single-die, unidirectional TVS structure optimized for high-energy transients in automotive power networks. Its junction passivation design enables stable operation up to 175 °C junction temperature and meets ISO 16750-2 load dump requirements under 10 ms exponential waveform conditions.
It delivers 4600 W non-repetitive peak impulse power with 10/1000 μs waveform and 3600 W with 10/10000 μs waveform, while maintaining low clamping voltage (32.4 V) at 142 A peak current - critical for protecting downstream DC-DC converters and microcontrollers during battery line surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.0 V - Maximum continuous reverse operating voltage before leakage exceeds 10 µA |
| VBR (min/max) | 22.2 V / 24.5 V at 5.0 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM |
| VC @ IPPM | 32.4 V at 142 A (10/1000 µs) - Clamping level protects 3.3 V/5 V logic and 40 V-rated MOSFETs |
| PPPM | 4600 W (10/1000 µs) - Sustains full load dump energy without failure per ISO 7637-2 Pulse 5a |
| TJ max | +175 °C - Enables placement near hot engine control units without derating |
| RθJC | 0.85 °C/W - Supports high-power dissipation with minimal case-to-heatsink thermal resistance |
| Package | DO-218AB - Surface-mount outline with matte tin leads, UL 94V-0 molding, JESD201 Class 2 whisker resistance |
Pinout & Package
DO-218AB is a unidirectional, two-terminal surface-mount package with cathode-marked anode-cathode polarity. The device has no internal pins; terminals are defined as Anode (lead 1) and Cathode (lead 2), with cathode identified by a molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected circuit | Connected to battery rail or power input; conducts during reverse surge when cathode is at higher potential |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per AEC standard |
| ISO 7637-2 & ISO 16750-2 compliant | Passes Pulse 5a (load dump) and Pulse 4 (jump start) testing without degradation |
| Junction temperature rating | Operates continuously from −55 °C to +175 °C - eliminates need for external thermal derating in ECU designs |
| Low clamping ratio | VC/VBR ≈ 1.34 - minimizes overvoltage stress on downstream regulators and gate drivers |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - allows unlimited floor life and standard reflow without baking |
Applications
| Automotive Engine Control Unit (ECU) Power Input Protection | Commercial Vehicle Body Control Module (BCM) Battery Interface |
|---|---|
Use Scenario: Protects 12 V/24 V power input of engine control units against load dump surges up to 35 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage between battery rail and chassis ground. Use Value: Limits clamped voltage to 32.4 V at 142 A, preventing damage to 40 V-rated DC-DC controllers and CAN transceivers. | Use Scenario: Shields body control modules in trucks and buses from jump-start surges and alternator regulation faults. IC Role / Device Role / Timing Role: Acts as primary overvoltage clamp on main battery feed, placed upstream of fuse and pre-regulator. Use Value: Withstands 4600 W peak power and maintains <10 µA leakage at 20 V, ensuring low quiescent current in always-on modules. |
| Off-Highway Equipment Telematics Power Supply | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Secures telematics gateway power input exposed to harsh 24 V vehicle electrical systems with frequent load switching. IC Role / Device Role / Timing Role: Fast-response TVS absorbs repetitive 10/1000 µs transients induced by solenoid actuation and relay chatter. Use Value: 0.85 °C/W RθJC enables direct PCB copper pour heatsinking, eliminating discrete heatsinks in space-constrained enclosures. | Use Scenario: Guards H-bridge driver ICs and gate drivers from inductive kickback and battery reversal events in EPS motor control circuits. IC Role / Device Role / Timing Role: Placed across motor supply rail and ground to clamp bidirectional spikes via complementary TVS array (with reverse-polarity device). Use Value: 175 °C junction rating supports mounting directly on motor driver PCBs near heat-generating FETs without thermal isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Lower PPPM (400 W), SMA package, RθJC ≈ 45 °C/W, VC = 32.4 V @ 12.3 A | Not suitable for ISO 7637-2 Pulse 5a; limited to low-energy board-level ESD/surge | Select TLD6S20AH where automotive load dump immunity is required; SMAJ20A only for consumer-grade 12 V inputs |
| SMCJ20A | Higher PPPM (1500 W), SMC package, RθJC ≈ 1.5 °C/W, VC = 32.4 V @ 46.5 A | Meets ISO 7637-2 Pulse 5b but not Pulse 5a; insufficient for full 35 V/100 ms load dump | TLD6S20AH provides 3× higher peak power and superior thermal performance for underhood deployment |
Compared with SMAJ20A and SMCJ20A, the TLD6S20AH delivers 3× and 3.1× higher peak pulse power respectively, combined with DO-218AB's 0.85 °C/W thermal resistance - enabling robust, compact placement in AEC-Q101-compliant automotive power rails without external heatsinking.
Availability
TLD6S20AH is available at Aetrix Electronics and suitable for automotive engine control units, commercial vehicle body control modules, off-highway telematics gateways, and electric power steering systems requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for TLD6S20AH 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 1992.
The TLD6SxxAH series was developed specifically for high-reliability automotive power line protection, targeting ISO 7637-2 load dump and ISO 16750-2 surge immunity in engine compartments and chassis-mounted ECUs.
FAQ
What is the maximum clamping voltage of the TLD6S20AH under standard test conditions?
The TLD6S20AH has a maximum clamping voltage (VC) of 32.4 V when subjected to a 10/1000 µs peak pulse current of 142 A. This value is measured at TA = 25 °C and reflects the actual voltage seen by downstream circuitry during worst-case surge events, ensuring compatibility with 36 V-rated power management ICs and gate drivers in automotive applications.
Is the TLD6S20AH qualified for automotive underhood use?
Yes, the TLD6S20AH is AEC-Q101 qualified and rated for junction temperatures from −55 °C to +175 °C. It meets ISO 7637-2 Pulse 5a (load dump) and ISO 16750-2 surge requirements, and its DO-218AB package passes JESD201 Class 2 whisker testing and J-STD-020 MSL Level 1 - confirming suitability for permanent installation in engine control units and other underhood automotive modules.
What is the marking code for the TLD6S20AH?
The TLD6S20AH is marked on the device body as "TLD6S20A", consistent with Taiwan Semiconductor's ordering nomenclature. The "H" suffix denotes tape-and-reel packaging (750 units per reel), and the date code and factory identifier follow the standard YWW/F format per the package outline drawing.
Does the TLD6S20AH support bidirectional transient suppression?
No, the TLD6S20AH is a unidirectional TVS diode, designed to clamp only reverse-polarity transients relative to its cathode terminal. For bidirectional protection, a complementary pair (e.g., TLD6S20AH + TLD6S20A with reversed orientation) or a dedicated bidirectional variant must be used - the TLD6S20AH itself conducts only when cathode voltage exceeds anode voltage by ≥22.2 V.
What is the thermal resistance from junction to case for the TLD6S20AH?
The TLD6S20AH has a typical junction-to-case thermal resistance (RθJC) of 0.85 °C/W when mounted on an ideal heatsink. This low value is enabled by the DO-218AB package's large copper leadframe and direct thermal path, allowing efficient heat transfer to PCB copper pours or external heatsinks - critical for sustaining repeated 4600 W surges in automotive environments.
TLD6S20AH 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 142A
- 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
TLD6S20AH FAQ
1.How can I place an order for TLD6S20AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD6S20AH 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 TLD6S20AH reliable?
The price and inventory of TLD6S20AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD6S20AH is usually 5 days.
3.What payment methods are accepted for TLD6S20AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD6S20AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD6S20AH?
TLD6S20AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD6S20AH 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 TLD6S20AH?
For technical support, including TLD6S20AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD6S20AH requirements.
6.How does Aetrix verify that TLD6S20AH is sourced from the original manufacturer or authorized distributors?
All TLD6S20AH 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 TLD6S20AH meets industry standards.
7.What is the process for return or replacement of TLD6S20AH?
All TLD6S20AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD6S20AH, 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 TLD6S20AH part is unused and in its original packaging.
Return procedure for TLD6S20AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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