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Taiwan Semiconductor Corporation TLD5S30AH
- Part No.:
- TLD5S30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD5S30AH.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,476
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Product details
Overview
TLD5S30AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-218AB package, rated for 30 V working stand-off voltage, 33.3–36.8 V breakdown voltage at 5 mA, and 3600 W peak pulse power (10/1000 µs), designed for automotive load dump surge protection in 12 V/24 V systems.
For engineers reviewing the TLD5S30AH datasheet, TLD5S30AH pinout, TLD5S30AH application, or TLD5S30AH equivalent, key selection criteria include clamping voltage (48.4 V at 74 A), junction temperature capability (−55 °C to +175 °C), AEC-Q101 qualification, ISO 7637-2 compliance, and DO-218AB thermal performance (RθJC = 0.9 °C/W).
Technical Context
The TLD5S30AH implements a single-die, unidirectional avalanche structure optimized for high-energy transients in automotive power networks. It meets ISO 7637-2 (load dump) and ISO 16750-2 surge requirements under defined test conditions, with clamping behavior characterized across 10/1000 µs and 10/10000 µs waveforms.
Its junction passivation design enables stable operation up to TJ = 175 °C, and its matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is fixed unidirectional, with no internal series impedance or integrated control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30.0 V - Maximum continuous reverse operating voltage before leakage exceeds 10 µA |
| VBR (min/max) | 33.3 V / 36.8 V at IT = 5 mA - Confirmed breakdown range defining turn-on threshold tolerance |
| VC @ IPPM | 48.4 V at 74 A (10/1000 µs) - Clamping voltage limiting downstream circuit stress during surge |
| PPPM (10/1000 µs) | 3600 W - Peak surge power handling capacity per single non-repetitive pulse |
| RθJC | 0.9 °C/W - Thermal resistance from junction to case, enabling effective heatsinking in high-power automotive mounts |
| TJ max | +175 °C - Maximum junction temperature supporting under-hood deployment without derating |
| αT | 0.090 %/°C - Temperature coefficient of VBR, used to calculate voltage shift over operating temperature range |
Pinout & Package
Package: DO-218AB - Surface-mount, unidirectional, single-diode configuration with cathode band marking; moisture sensitivity level 1 (J-STD-020); UL 94V-0 molding compound; 2.677 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input / Surge return path | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal / Surge shunt node | Connected to protected line (e.g., battery rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ISO 7637-2 compliance | Withstands 12 V system load dump pulses (up to 120 V, 400 ms) when mounted per spec |
| Junction temperature rating | Operates continuously from −55 °C to +175 °C without parameter drift or failure |
| Low clamping ratio | VC/VBR ≈ 1.35 - Minimizes voltage overshoot during fast transients |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Battery Rail Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed circuits against alternator load dump surges (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input. Use Value: Limits clamped voltage to ≤48.4 V during 3600 W transients, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding ECU main power supply against coupled transients from solenoid switching and ignition noise. IC Role / Device Role / Timing Role: Primary surge shunt device on main VBAT input, upstream of filtering and LDOs. Use Value: Withstands 500 A peak forward surge (8.3 ms half-sine) and maintains <10 µA leakage at 30 V, ensuring low quiescent loss. |
| Body Control Module (BCM) Power Distribution | ADAS Camera Power Interface |
Use Scenario: Securing centralized power distribution nodes feeding multiple sub-systems in vehicle body electronics. IC Role / Device Role / Timing Role: High-power TVS on fused 24 V feed lines to BCM power bus. Use Value: Delivers 2800 W surge rating at 10/10000 µs waveform, matching long-duration load dump profiles in commercial vehicles. | Use Scenario: Protecting 12 V camera module inputs exposed to harness-induced transients in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Final-stage TVS on camera board power entry, adjacent to connector. Use Value: Low 0.090 %/°C VBR tempco ensures stable clamping across −40 °C to +105 °C ambient, critical for imaging stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Lower PPPM (400 W), SMA package, RθJC ≈ 35 °C/W, VC = 48.4 V same but lower surge margin | Not AEC-Q101 qualified; limited to industrial/commercial use; unsuitable for under-hood automotive | Select only if thermal constraints allow higher junction rise and automotive qualification is not required |
| TPSMD33A | DO-214AB package, PPPM = 3300 W (10/1000 µs), VC = 53.3 V, TJ max = +150 °C, AEC-Q101 qualified | Higher clamping voltage reduces system margin; lower max junction temperature limits under-hood placement | Acceptable where 53.3 V clamping is tolerable and ambient temperature stays below 125 °C |
Compared with SMAJ30A and TPSMD33A, the TLD5S30AH delivers superior surge energy handling (3600 W), higher junction temperature rating (+175 °C), and tighter clamping ratio - making it the preferred choice for demanding automotive load dump protection where thermal headroom and reliability are critical.
Availability
TLD5S30AH is available at Aetrix Electronics and suitable for automotive battery rail protection, engine control unit (ECU) power input, and body control module (BCM) power distribution requiring stable component supply across extended temperature and lifecycle demands.
Supply support for TLD5S30AH 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 rectifiers, with global distribution and AEC-Q101 validation capabilities.
The TLD5SxxAH product line is engineered specifically for high-energy automotive transient suppression, emphasizing robustness against load dump, thermal stability at +175 °C, and compliance with ISO 7637-2 and ISO 16750-2 standards.
FAQ
What is the clamping voltage of the TLD5S30AH at its rated peak pulse current?
The TLD5S30AH has a maximum clamping voltage (VC) of 48.4 V at IPPM = 74 A with a 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The TLD5S30AH maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient (0.090 %/°C). Designers must verify layout parasitics do not elevate effective clamping beyond this spec.
Is the TLD5S30AH suitable for 24 V automotive systems?
Yes, the TLD5S30AH is explicitly designed for both 12 V and 24 V automotive systems. Its 30 V working stand-off voltage (VWM) provides sufficient margin above nominal 24 V rail voltages while allowing reliable conduction during load dump events exceeding 100 V. The device meets ISO 7637-2 Pulse 5a/b requirements for 24 V systems and is AEC-Q101 qualified for under-hood deployment. Its +175 °C junction rating supports sustained operation in high-ambient environments typical of commercial vehicle power distribution.
Does the TLD5S30AH have polarity markings, and how is it oriented on PCB?
Yes, the TLD5S30AH uses standard DO-218AB polarity marking: a cathode band (visible ink stripe) identifies the cathode terminal. During PCB layout, the cathode must be connected to the line being protected (e.g., battery rail), and the anode to ground or low-side reference. This unidirectional orientation ensures proper surge shunting. The device's mechanical outline and suggested pad layout are documented in Taiwan Semiconductor's D2103 datasheet revision, confirming cathode-band-to-rail alignment for optimal thermal and electrical performance.
What is the thermal resistance from junction to case (RθJC) for the TLD5S30AH, and how does it impact heatsinking?
The TLD5S30AH has a junction-to-case thermal resistance (RθJC) of 0.9 °C/W under ideal heatsink conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper or external heatsink, critical for sustaining repeated surge events without thermal runaway. To achieve this rating, designers must implement minimum 100 mm² of 2 oz copper connected to both terminals, per Taiwan Semiconductor's layout guidelines. Without adequate copper area, actual RθJC will degrade, reducing safe surge repetition rate and lifetime reliability.
How does the TLD5S30AH compare to the TLD5S30A variant?
The TLD5S30AH and TLD5S30A share identical electrical specifications, package (DO-218AB), and marking code (TLD5S30A), but differ in packaging and qualification: TLD5S30AH is supplied in tape-and-reel (750 pcs/reel) and is AEC-Q101 qualified, whereas TLD5S30A is typically offered in bulk or different reel quantities and may lack full automotive qualification documentation. For automotive production, TLD5S30AH is the designated qualified version; both parts are functionally interchangeable in non-automotive designs where qualification is not mandated.
TLD5S30AH 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 74A
- Power - Peak Pulse:
- 2800W (2.8kW)
- 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
TLD5S30AH FAQ
1.How can I place an order for TLD5S30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD5S30AH 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 TLD5S30AH reliable?
The price and inventory of TLD5S30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD5S30AH is usually 5 days.
3.What payment methods are accepted for TLD5S30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD5S30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD5S30AH?
TLD5S30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD5S30AH 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 TLD5S30AH?
For technical support, including TLD5S30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD5S30AH requirements.
6.How does Aetrix verify that TLD5S30AH is sourced from the original manufacturer or authorized distributors?
All TLD5S30AH 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 TLD5S30AH meets industry standards.
7.What is the process for return or replacement of TLD5S30AH?
All TLD5S30AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD5S30AH, 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 TLD5S30AH part is unused and in its original packaging.
Return procedure for TLD5S30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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