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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation TLD8S36AH

Name: TLD8S36AH
Brand: Taiwan Semiconductor Corporation
SKU: TLD8S36AH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLD8S36AH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-218AB

Datasheet:: TLD8S36AH.pdf

Description:: 6600W, 42.1V, 5%, UNIDIRECTIONAL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLD8S36AH from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-218AB package, rated for 36 V working stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 58.1 V clamping voltage (VC) at 114 A peak impulse current, and 6600 W peak pulse power (10/1000 μs). It delivers automotive-grade surge protection against load dump and ISO 7637-2 transients in 12 V/24 V vehicle power systems.

For engineers reviewing the TLD8S36AH datasheet, TLD8S36AH pinout, TLD8S36AH application, or TLD8S36AH equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C junction capability, DO-218AB thermal performance (R_θJC = 0.8 °C/W), and compliance with ISO 16750-2 and IEC 61000-4-2 Level 4.

Technical Context

The TLD8S36AH employs junction passivation optimized design technology to sustain 175 °C junction temperature operation, enabling high-reliability deployment in under-hood automotive environments. Its unidirectional configuration provides low forward voltage (V_F ≤ 1.8 V at 100 A) and high surge current handling (I_FSM = 700 A, 8.3 ms half-sine).

It meets ISO 7637-2 Pulse 5a/b (load dump) and ISO 16750-2 test conditions for automotive electrical systems, with verified clamping performance (V_C = 58.1 V @ 114 A, 10/1000 μs) and low leakage (<10 µA at V_WM and <150 µA at 175 °C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	36.0 V - Maximum continuous reverse operating voltage before conduction begins; defines system voltage margin for 24 V nominal bus.
V_BR (min/max)	40.0 / 44.2 V - Breakdown occurs within this range at 5 mA test current; ensures predictable turn-on during transients.
V_C @ I_PPM	58.1 V - Clamped voltage at 114 A (10/1000 μs); limits downstream IC stress during load dump events.
P_PPM (10/1000 μs)	6600 W - Peak pulse power rating; supports robust protection against severe automotive surges without failure.
R_θJC	0.8 °C/W - Junction-to-case thermal resistance with ideal heatsink; enables efficient heat transfer in high-power mounting scenarios.
T_J max	+175 °C - Maximum junction temperature; certified for under-hood placement per AEC-Q101 Grade 0.
I_R @ V_WM, 175°C	150 µA - Low high-temp leakage preserves system quiescent current budget in always-on modules.

Pinout & Package

Package: DO-218AB molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity marked by cathode band. Weight: 2.691 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Surge return path	Connected to ground or low-side reference; completes clamping loop during positive transients.
Cathode	Protected line connection / Surge sink	Connected to protected supply rail (e.g., battery+); conducts surge current into anode during overvoltage.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive use across temperature, humidity, mechanical shock, and lifetime reliability requirements.
175 °C junction rating	Enables direct mounting on engine control units or body controllers without derating in hot ambient zones.
ISO 7637-2 & ISO 16750-2 compliance	Guarantees functional immunity to standardized automotive load dump and supply variation transients.
Low clamping ratio (V_C/V_BR ≈ 1.38)	Minimizes voltage overshoot during clamping, reducing stress on downstream DC-DC converters and microcontrollers.
Halogen-free & RoHS compliant	Meets global environmental regulations and end-of-life material restrictions for automotive OEMs.

Applications

Engine Control Unit (ECU) Power Input	Body Control Module (BCM) Battery Line
Use Scenario: Protects ECU main 12 V input against alternator load dump spikes up to 40 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery+ and ground, clamping transients before they reach LDOs and MCU power rails. Use Value: Limits clamped voltage to 58.1 V while absorbing 6600 W, preventing brownout or latch-up in safety-critical engine management logic.	Use Scenario: Shields BCM power domain from ISO 16750-2 test pulses including slow-rising surges and repeated load dumps. IC Role / Device Role / Timing Role: Primary surge suppression device on fused battery feed, coordinated with upstream fuses and downstream LC filters. Use Value: Maintains <10 µA leakage at 36 V and 25 °C, preserving sleep-mode current budget for always-on wake-up circuitry.
Advanced Driver Assistance System (ADAS) Camera Power	Electric Power Steering (EPS) Motor Driver Supply
Use Scenario: Safeguards 12 V camera module input against ignition-induced transients and jump-start surges. IC Role / Device Role / Timing Role: First-line transient suppressor on camera PCB, positioned ahead of DC-DC converter and image sensor power conditioning. Use Value: Achieves 58.1 V clamping at 114 A with 0.8 °C/W thermal resistance, enabling compact heatsinking on small camera flex PCBs.	Use Scenario: Protects EPS motor driver H-bridge supply rail from regenerative braking surges and battery reversal events. IC Role / Device Role / Timing Role: High-energy unidirectional TVS connected directly across motor driver input terminals. Use Value: Withstands 700 A non-repetitive forward surge (8.3 ms), ensuring survival during motor stall and fault recovery sequences.

Engine Control Unit (ECU) Power Input

Body Control Module (BCM) Battery Line

Use Scenario: Protects ECU main 12 V input against alternator load dump spikes up to 40 V and 100 ms duration.

IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery+ and ground, clamping transients before they reach LDOs and MCU power rails.

Use Value: Limits clamped voltage to 58.1 V while absorbing 6600 W, preventing brownout or latch-up in safety-critical engine management logic.

Use Scenario: Shields BCM power domain from ISO 16750-2 test pulses including slow-rising surges and repeated load dumps.

IC Role / Device Role / Timing Role: Primary surge suppression device on fused battery feed, coordinated with upstream fuses and downstream LC filters.

Use Value: Maintains <10 µA leakage at 36 V and 25 °C, preserving sleep-mode current budget for always-on wake-up circuitry.

Advanced Driver Assistance System (ADAS) Camera Power

Electric Power Steering (EPS) Motor Driver Supply

Use Scenario: Safeguards 12 V camera module input against ignition-induced transients and jump-start surges.

IC Role / Device Role / Timing Role: First-line transient suppressor on camera PCB, positioned ahead of DC-DC converter and image sensor power conditioning.

Use Value: Achieves 58.1 V clamping at 114 A with 0.8 °C/W thermal resistance, enabling compact heatsinking on small camera flex PCBs.

Use Scenario: Protects EPS motor driver H-bridge supply rail from regenerative braking surges and battery reversal events.

IC Role / Device Role / Timing Role: High-energy unidirectional TVS connected directly across motor driver input terminals.

Use Value: Withstands 700 A non-repetitive forward surge (8.3 ms), ensuring survival during motor stall and fault recovery sequences.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ36A	Lower P_PPM (400 W), SMA package, R_θJC ≈ 45 °C/W, V_C = 58.1 V @ 6.9 A	Not suitable for automotive load dump; limited to low-energy board-level ESD/surge.	Select only for cost-sensitive non-automotive industrial applications where 6600 W surge capacity is unnecessary.
SMCJ36A	Same DO-214AB package, P_PPM = 1500 W, V_C = 58.1 V @ 25.8 A, R_θJC ≈ 3.5 °C/W	Lacks AEC-Q101 qualification and 175 °C rating; not validated for under-hood use.	Acceptable for chassis-mounted modules outside engine bay if full load dump immunity is not required.

Compared with SMAJ36A and SMCJ36A, the TLD8S36AH delivers 4.4× and 4.4× higher peak pulse power respectively, with AEC-Q101 certification and thermal performance optimized for sustained high-temperature automotive deployment-making it the only option qualified for direct integration into engine compartment electronics.

Availability

TLD8S36AH is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit protection, and ADAS camera power conditioning requiring stable component supply across extended production lifecycles.

Supply support for TLD8S36AH 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, analog ICs, and automotive-qualified components.

The TLD8SxxAH series was developed specifically for high-energy automotive transient suppression, targeting ISO 7637-2 load dump compliance and under-hood thermal resilience in next-generation vehicle ECUs and ADAS systems.

FAQ

Is the TLD8S36AH unidirectional or bidirectional?

The TLD8S36AH is a unidirectional transient voltage suppressor. Its marking code "TLD8S36A" and position in the unidirectional table of the datasheet confirm this configuration. It protects against positive-going transients on a DC line referenced to ground, with cathode connected to the protected supply rail and anode to ground. Bidirectional variants carry the "CA" suffix (e.g., TLD8S36CAH).

What is the maximum clamping voltage of the TLD8S36AH and at what current is it specified?

The maximum clamping voltage (V_C) of the TLD8S36AH is 58.1 V, measured at a peak impulse current (I_PPM) of 114 A using the standard 10/1000 μs waveform. This value is guaranteed across temperature and process variation per the datasheet's Electrical Specifications table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.

Does the TLD8S36AH meet AEC-Q101 reliability standards?

Yes, the TLD8S36AH is explicitly AEC-Q101 qualified, as stated in the Features section of the official datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, humidity bias, and mechanical shock-ensuring suitability for automotive powertrain and chassis applications where long-term reliability is mandatory.

What is the thermal resistance from junction to case (R_θJC) for the TLD8S36AH?

The junction-to-case thermal resistance (R_θJC) for the TLD8S36AH is 0.8 °C/W, specified under ideal heatsink conditions. This low value reflects the DO-218AB package's enhanced thermal path and enables effective heat dissipation when mounted on copper pads or external heatsinks-critical for maintaining safe junction temperatures during repeated high-energy surges.

Can the TLD8S36AH be used in both 12 V and 24 V automotive systems?

Yes, the TLD8S36AH is designed for dual-voltage compatibility. Its 36 V working stand-off voltage (V_WM) provides sufficient margin above nominal 24 V system voltages (typically 27–28 V max), while also accommodating 12 V systems with headroom for ripple and regulation tolerance. It is validated for ISO 7637-2 Pulse 5a (12 V) and Pulse 5b (24 V) load dump waveforms.

TLD8S36AH 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):: 36V

Voltage - Breakdown (Min):: 40V

Voltage - Clamping (Max) @ Ipp:: 58.1V

Current - Peak Pulse (10/1000µs):: 114A

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

TLD8S36AH FAQ

1.How can I place an order for TLD8S36AH through Aetrix?

Please submit a Request for Quotation (RFQ) for TLD8S36AH 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 TLD8S36AH reliable?

The price and inventory of TLD8S36AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S36AH is usually 5 days.

3.What payment methods are accepted for TLD8S36AH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S36AH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLD8S36AH?

TLD8S36AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLD8S36AH 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 TLD8S36AH?

For technical support, including TLD8S36AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S36AH requirements.

6.How does Aetrix verify that TLD8S36AH is sourced from the original manufacturer or authorized distributors?

All TLD8S36AH 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 TLD8S36AH meets industry standards.

7.What is the process for return or replacement of TLD8S36AH?

All TLD8S36AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S36AH, 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 TLD8S36AH part is unused and in its original packaging.

Return procedure for TLD8S36AH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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