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Taiwan Semiconductor Corporation TLD6S33AH
- Part No.:
- TLD6S33AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD6S33AH.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
TLD6S33AH from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-218AB package, rated for 33.0 V working stand-off voltage, 36.7–40.6 V breakdown voltage at 5 mA, and 4600 W peak pulse power (10/1000 µs). It operates from –55 °C to +175 °C and meets AEC-Q101, ISO 7637-2, and ISO 16750-2 for automotive load dump protection.
For engineers reviewing the TLD6S33AH datasheet, TLD6S33AH pinout, TLD6S33AH application, or TLD6S33AH equivalent, this page delivers verified electrical parameters, thermal performance data, clamping behavior under surge, junction-to-case resistance, and real-world automotive surge compliance - all specific to the TLD6S33AH variant.
Technical Context
The TLD6S33AH implements a single-die, unidirectional silicon avalanche structure optimized for high-energy transients in 12 V/24 V automotive systems. Its 0.85 °C/W junction-to-case thermal resistance enables effective heat transfer to PCB copper or heatsinks during repetitive load dump events.
It complies with ISO 7637-2 Pulse 5a (load dump) and ISO 16750-2 surge testing up to specified energy levels, with clamping voltage of 53.3 V at 86 A (10/1000 µs), and exhibits low leakage (<10 µA at VWM, <150 µA at TJ = 175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.0 V - Maximum continuous reverse operating voltage before significant leakage begins; defines system bus voltage compatibility. |
| VBR (min/max) | 36.7 V / 40.6 V at IT = 5 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM in production tolerance bands. |
| VC @ IPPM | 53.3 V at 86 A (10/1000 µs) - Clamping voltage limits downstream IC stress during worst-case load dump surges. |
| PPPM (10/1000 µs) | 4600 W - Peak surge power handling capability validated per IEC 61000-4-5 waveform standards. |
| RθJC | 0.85 °C/W - Enables thermal design with minimal heatsink area; supports sustained operation at TJ = 175 °C. |
| TJ max | +175 °C - Qualified for under-hood automotive environments without derating in most mounting configurations. |
| IR @ VWM | ≤10 µA at 25 °C; ≤150 µA at 175 °C - Low leakage preserves battery drain budgets in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - Surface-mount, unidirectional, single-terminal polarity marking (cathode band), matte tin-plated leads, UL 94V-0 molding compound, 2.682 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or chassis return path; forms current path during reverse-biased surge conduction. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., battery rail); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47. |
| Junction passivation technology | Reduces surface leakage and improves long-term stability under high humidity and thermal stress. |
| ISO 7637-2 & ISO 16750-2 compliance | Meets automotive surge immunity requirements for load dump (Pulse 5a) and supply voltage variation tests. |
| 175 °C junction rating | Enables placement near heat sources (e.g., power converters) without thermal derating in typical PCB layouts. |
| DO-218AB mechanical robustness | UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance ensure long-term solder joint integrity. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Protection |
|---|---|
Use Scenario: Protects 33 V nominal power input of engine control units against alternator load dump surges up to 4600 W. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage on main 12 V/24 V supply rail before it reaches MCU, CAN transceivers, and analog sensors. Use Value: Limits clamping voltage to 53.3 V, ensuring downstream components remain within absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Shields BCM power inputs from battery line transients caused by relay switching, jump-starts, and generator regulation faults. IC Role / Device Role / Timing Role: Acts as primary overvoltage clamp on fused battery feed, absorbing energy before LDOs and microcontrollers. Use Value: With 0.85 °C/W RθJC and 175 °C TJ max, maintains stable clamping performance across under-dash ambient temperatures. |
| ADAS Camera Power Supply Protection | Electric Power Steering (EPS) ECU Protection |
Use Scenario: Safeguards 33 V-rated image sensor and ISP power rails in forward-facing ADAS cameras exposed to vehicle-level surges. IC Role / Device Role / Timing Role: Fast-response TVS placed at camera module input connector to suppress fast-rising transients from nearby motor actuation. Use Value: 53.3 V clamping voltage prevents latch-up or damage to 3.3 V/5 V internal regulators fed from buck converters. | Use Scenario: Defends EPS electronic control unit against load dump and reverse battery connection-induced surges in 24 V commercial vehicles. IC Role / Device Role / Timing Role: Primary surge suppression device on high-current battery input, upstream of DC-DC converters and gate drivers. Use Value: 4600 W peak power rating handles worst-case 24 V load dump waveforms defined in ISO 16750-2 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Lower PPPM (400 W), SMA package, RθJC ≈ 50 °C/W, VBR = 36.7–40.7 V | Not suitable for automotive load dump; limited to low-energy board-level ESD/surge. | Select only for non-automotive, low-power applications where space constraints preclude DO-218AB. |
| SMCJ33A | PPPM = 1500 W, SMC package, RθJC ≈ 12 °C/W, same VBR range, no AEC-Q101 qualification | Lacks automotive qualification and thermal performance for under-hood deployment. | Acceptable for industrial controls with lower surge severity; verify ISO 7637-2 compliance separately. |
Compared with SMAJ33A and SMCJ33A, the TLD6S33AH delivers 3× higher surge power handling, 15× better thermal resistance, and full AEC-Q101 qualification - making it the only option validated for direct integration into automotive power rail protection without external heatsinking.
Availability
TLD6S33AH is available at Aetrix Electronics and suitable for automotive ECU power input protection, body control module surge hardening, ADAS camera supply conditioning, and electric power steering system design requiring stable component supply and long-term lifecycle support.
Supply support for TLD6S33AH 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 since 1995.
The TLD6SxxAH series was developed specifically for high-reliability automotive transient suppression, targeting load dump protection in 12 V and 24 V systems with extended temperature operation and industry-standard surge compliance.
FAQ
What is the maximum clamping voltage of the TLD6S33AH under standard surge conditions?
The TLD6S33AH has a maximum clamping voltage (VC) of 53.3 V when subjected to an 86 A peak impulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 and is guaranteed across the full operating temperature range. The clamping performance directly protects downstream circuitry such as MCUs and CAN transceivers in automotive applications where the TLD6S33AH is deployed.
Is the TLD6S33AH qualified for automotive use per AEC-Q101?
Yes, the TLD6S33AH is fully AEC-Q101 qualified, including stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD). This qualification confirms its suitability for under-hood and safety-critical automotive systems. The TLD6S33AH datasheet explicitly states AEC-Q101 compliance, and Taiwan Semiconductor provides full test reports upon request for the TLD6S33AH.
What is the thermal resistance from junction to case (RθJC) for the TLD6S33AH?
The TLD6S33AH has a typical junction-to-case thermal resistance (RθJC) of 0.85 °C/W when mounted on an ideal heatsink. This low value enables efficient heat dissipation during repetitive surge events and supports operation at the full +175 °C junction temperature rating. Thermal design guidance for the TLD6S33AH is provided in Taiwan Semiconductor's application notes for DO-218AB layout and copper pour sizing.
Does the TLD6S33AH meet ISO 7637-2 and ISO 16750-2 surge standards?
Yes, the TLD6S33AH meets both ISO 7637-2 (Pulse 5a load dump) and ISO 16750-2 surge immunity requirements as verified by Taiwan Semiconductor's characterization testing. These standards define transient waveforms and energy levels for automotive electrical systems, and the TLD6S33AH's 4600 W peak pulse power rating ensures compliance across the specified test conditions for the TLD6S33AH.
What is the polarity configuration and marking convention for the TLD6S33AH?
The TLD6S33AH is a unidirectional TVS diode with cathode indicated by a band on the DO-218AB package. Its marking code is "TLD6S33A", followed by date and factory codes. Polarity must be observed during PCB layout: cathode connects to the protected line (e.g., battery rail), anode to ground. Incorrect orientation renders the TLD6S33AH ineffective against reverse transients.
TLD6S33AH 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 86A
- 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
TLD6S33AH FAQ
1.How can I place an order for TLD6S33AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD6S33AH 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 TLD6S33AH reliable?
The price and inventory of TLD6S33AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD6S33AH is usually 5 days.
3.What payment methods are accepted for TLD6S33AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD6S33AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD6S33AH?
TLD6S33AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD6S33AH 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 TLD6S33AH?
For technical support, including TLD6S33AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD6S33AH requirements.
6.How does Aetrix verify that TLD6S33AH is sourced from the original manufacturer or authorized distributors?
All TLD6S33AH 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 TLD6S33AH meets industry standards.
7.What is the process for return or replacement of TLD6S33AH?
All TLD6S33AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD6S33AH, 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 TLD6S33AH part is unused and in its original packaging.
Return procedure for TLD6S33AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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