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Taiwan Semiconductor Corporation TLD5S24AH
- Part No.:
- TLD5S24AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD5S24AH.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,806
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Product details
Overview
TLD5S24AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-218AB package, rated for 24.0 V working stand-off voltage, 26.7–29.5 V breakdown voltage at 5 mA, 38.9 V clamping voltage at 93 A peak pulse current, and 3600 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and designed for automotive load dump surge protection in 12 V/24 V systems.
For engineers reviewing the TLD5S24AH datasheet, TLD5S24AH pinout, TLD5S24AH application, or TLD5S24AH equivalent, key selection criteria include its 175 °C junction temperature rating, 0.9 °C/W junction-to-case thermal resistance, ISO 7637-2 compliance, unidirectional polarity, and DO-218AB mechanical footprint compatibility with high-power automotive PCB layouts.
Technical Context
The TLD5S24AH implements a silicon avalanche diode structure optimized for high-energy transient suppression in automotive power rails. Its junction passivation design enables stable operation up to TJ = 175 °C and meets stringent reliability requirements per AEC-Q101.
It delivers 3600 W non-repetitive peak impulse power under 10/1000 µs waveform and 2800 W under 10/10000 µs waveform, with clamping performance verified across temperature (–55 °C to +175 °C) and low leakage (<10 µA at VWM, <150 µA at TJ = 175 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 26.7 V / 29.5 V at IT = 5 mA - Ensures reliable triggering above system nominal voltage |
| VC @ IPPM | 38.9 V at 93 A (10/1000 µs) - Limits downstream voltage stress during load dump events |
| PPPM | 3600 W (10/1000 µs) - Withstands ISO 7637-2 Pulse 5a/b surges without failure |
| TJ max | 175 °C - Enables placement near hot engine-control electronics without derating |
| RθJC | 0.9 °C/W - Supports thermal management with minimal heatsink area in constrained layouts |
| Polarity | Unidirectional - Protects only against negative transients on positive-rail systems |
Pinout & Package
Package: DO-218AB - Surface-mount, single-die, unidirectional TVS in thermally enhanced molded case with matte tin-plated leads (J-STD-002 compliant), UL 94V-0 rated molding compound, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage |
| Anode | Reference/return path | Typically tied to chassis or power ground; completes clamping loop with low-inductance layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ISO 7637-2 & ISO 16750-2 compliance | Guarantees survivability against real-world automotive load dump and jump-start transients |
| Junction temperature rating (TJ = 175 °C) | Enables direct mounting on high-temperature engine control units without thermal derating |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during fast transients while maintaining margin to IC absolute maximum ratings |
| DO-218AB thermal performance | 0.9 °C/W RθJC allows >5 W steady-state dissipation with modest heatsinking |
Applications
| Automotive Engine Control Unit (ECU) Power Input Protection | Commercial Vehicle 24 V Battery Rail Protection |
|---|---|
Use Scenario: Suppresses ISO 7637-2 Pulse 5a (load dump) transients on 24 V supply lines feeding microcontrollers and sensors in under-hood ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at power entry point before DC/DC converter input. Use Value: Limits transient voltage to ≤38.9 V, protecting downstream 40 V-rated regulators and logic ICs from destructive overvoltage. | Use Scenario: Guards 24 V battery-fed infotainment and telematics modules against jump-start surges and alternator regulation faults. IC Role / Device Role / Timing Role: Primary surge suppression element in front-end protection circuit, coordinated with upstream fuse and downstream LC filter. Use Value: Absorbs 3600 W peak energy without degradation, maintaining system uptime in harsh commercial vehicle environments. |
| Truck Body Controller Power Distribution | Off-Highway Equipment CAN Bus Power Conditioning |
Use Scenario: Installed on centralized power distribution board supplying lighting, HVAC, and door modules in heavy-duty trucks. IC Role / Device Role / Timing Role: High-power TVS on main 24 V bus feed, sized to handle repetitive load dump events during frequent engine starts/stops. Use Value: Sustains 175 °C junction temperature during prolonged high-ambient operation, eliminating thermal runaway risk. | Use Scenario: Protects isolated CAN transceiver power rails in construction and agricultural machinery exposed to generator-induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after primary bulk TVS, ensuring clean 5 V or 3.3 V supply to CAN PHY. Use Value: Low leakage (<10 µA at 24 V) prevents quiescent current drain in always-on CAN nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower PPPM (400 W), SMA package, RθJC ≈ 50 °C/W, VBR = 26.7–29.7 V | Not suitable for ISO 7637-2 Pulse 5; limited to low-energy IEC 61000-4-2/4-5 events | Select when cost sensitivity outweighs automotive surge requirements and board space permits larger thermal relief. |
| SMCJ24A | PPPM = 1500 W, SMC package, RθJC ≈ 3.5 °C/W, same VBR range, no AEC-Q101 qualification | Lacks AEC-Q101 validation and ISO 7637-2 compliance documentation; requires additional qualification effort | Consider for industrial transport applications where full automotive qualification is not mandated but higher power than SMAJ is needed. |
Compared with SMAJ24A and SMCJ24A, the TLD5S24AH delivers 2.4× and 2.4× higher peak pulse power respectively, certified AEC-Q101 reliability, and documented ISO 7637-2 compliance-making it the only option qualified for direct integration into production automotive power rail designs without supplemental testing.
Availability
TLD5S24AH is available at Aetrix Electronics and suitable for automotive engine control units, commercial vehicle battery rail protection, and off-highway equipment power distribution requiring stable component supply and long-term lifecycle support.
Supply support for TLD5S24AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The TLD5SxxAH series was developed specifically for high-reliability automotive transient suppression, emphasizing thermal robustness, AEC-Q101 compliance, and ISO 7637-2 Pulse 5 survivability in compact DO-218AB packaging.
FAQ
What is the clamping voltage of the TLD5S24AH under standard test conditions?
The TLD5S24AH has a maximum clamping voltage (VC) of 38.9 V when subjected to a 10/1000 µs peak pulse current of 93 A. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuits during surge events. The clamping performance remains stable across its full operating temperature range (–55 °C to +175 °C), making the TLD5S24AH suitable for under-hood automotive applications where ambient temperatures exceed 125 °C.
Is the TLD5S24AH AEC-Q101 qualified and what does that mean for automotive use?
Yes, the TLD5S24AH is AEC-Q101 qualified. This certification confirms it has passed rigorous stress tests-including high-temperature operating life, temperature cycling, and electrostatic discharge-required for discrete semiconductors in automotive applications. As a result, the TLD5S24AH is approved for use in safety-critical and mission-critical systems such as engine control units and body controllers without requiring additional qualification by the end customer.
What package type does the TLD5S24AH use and why is it important for thermal performance?
The TLD5S24AH uses the DO-218AB surface-mount package, which features a thermally enhanced leadframe and low thermal resistance (RθJC = 0.9 °C/W). This design enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink, supporting sustained power dissipation up to 5 W and enabling reliable operation at junction temperatures up to 175 °C-critical for placement near high-heat sources in automotive electronics.
Does the TLD5S24AH meet ISO 7637-2 and ISO 16750-2 standards, and which test pulses does it cover?
Yes, the TLD5S24AH meets both ISO 7637-2 and ISO 16750-2 surge specifications. It is validated for Load Dump Pulse 5a and 5b (12 V and 24 V systems), including exponential waveforms up to 10 ms duration and peak powers exceeding 3000 W. Compliance is confirmed through standardized lab testing per the referenced standards, making the TLD5S24AH appropriate for front-end protection in automotive power networks subject to alternator regulation faults.
What is the polarity configuration of the TLD5S24AH and how does it affect circuit implementation?
The TLD5S24AH is a unidirectional TVS diode, meaning it conducts only during reverse-biased overvoltage events-i.e., when the cathode is driven positive relative to the anode. In practice, this requires the cathode to be connected to the protected line (e.g., 24 V rail) and the anode to system ground. This configuration provides optimal clamping for negative-going transients on positive rails and avoids forward conduction during normal operation, ensuring negligible leakage and no impact on steady-state power integrity.
TLD5S24AH 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 93A
- 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
TLD5S24AH FAQ
1.How can I place an order for TLD5S24AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD5S24AH 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 TLD5S24AH reliable?
The price and inventory of TLD5S24AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD5S24AH is usually 5 days.
3.What payment methods are accepted for TLD5S24AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD5S24AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD5S24AH?
TLD5S24AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD5S24AH 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 TLD5S24AH?
For technical support, including TLD5S24AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD5S24AH requirements.
6.How does Aetrix verify that TLD5S24AH is sourced from the original manufacturer or authorized distributors?
All TLD5S24AH 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 TLD5S24AH meets industry standards.
7.What is the process for return or replacement of TLD5S24AH?
All TLD5S24AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD5S24AH, 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 TLD5S24AH part is unused and in its original packaging.
Return procedure for TLD5S24AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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