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Taiwan Semiconductor Corporation TLD5S20AH
- Part No.:
- TLD5S20AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD5S20AH.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,604
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Product details
Overview
TLD5S20AH 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 3600 W peak pulse power (10/1000 μs), designed for automotive load dump surge protection in engine control units and body electronics.
For engineers reviewing the TLD5S20AH datasheet, TLD5S20AH pinout, TLD5S20AH application, or TLD5S20AH equivalent, key selection criteria include clamping voltage (32.4 V at 111 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 TLD5S20AH implements a single-die, unidirectional avalanche structure optimized for high-energy transients in 12 V automotive systems. It delivers 3600 W non-repetitive peak impulse power under 10/1000 μs waveform and maintains stable clamping (VC = 32.4 V) at 111 A IPPM, with low leakage (<10 µA at VWM and <150 µA at TJ = 175 °C).
Its junction passivation design enables operation up to 175 °C and meets JESD201 Class 2 whisker resistance, UL 94V-0 molding compound, and moisture sensitivity level 1 per J-STD-020 - all aligned with automotive reliability requirements per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 5.0 mA - Confirmed breakdown range ensures reliable triggering margin above VWM |
| VC @ IPPM | 32.4 V at 111 A (10/1000 μs) - Clamping voltage limits downstream IC stress during load dump events |
| PPPM | 3600 W (10/1000 μs) - Peak surge energy handling capacity for ISO 7637-2 Pulse 5a compliance |
| RθJC | 0.9 °C/W - Enables effective heat transfer to heatsink or PCB copper for sustained surge duty |
| TJ Range | −55 °C to +175 °C - Full operational range supports under-hood placement in modern vehicles |
Pinout & Package
Package: DO-218AB - Surface-mount, unidirectional, single-anode/cathode configuration with matte tin-plated leads, UL 94V-0 molding, and polarity marking (cathode band). Weight: 2.677 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or chassis return path; defines conduction direction during reverse surge |
| Cathode | High-side transient clamp node | Connected to protected line (e.g., battery rail); sinks surge current into ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ISO 7637-2 & ISO 16750-2 compliant | Meets Load Dump (Pulse 5a) and supply voltage variation test requirements without derating |
| Junction temperature max = 175 °C | Enables direct mounting near high-heat sources (e.g., power modules) without thermal throttling |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, supporting standard SMT assembly processes |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Power Rail |
|---|---|
Use Scenario: Protects 12 V supply input of gasoline/diesel ECUs against alternator load dump surges up to 35 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient overvoltage before it reaches LDOs, microcontrollers, and driver ICs. Use Value: Limits peak rail voltage to ≤32.4 V during 3600 W surge, preventing latch-up or permanent damage to downstream silicon. | Use Scenario: Shields 12 V power feeding isolated CAN transceivers in BCMs from battery line transients during jump-start or relay switching. IC Role / Device Role / Timing Role: Fast-response TVS absorbs energy before it couples into signal isolation barriers or transceiver VCC pins. Use Value: Maintains <10 µA leakage at 20 V, ensuring minimal quiescent current impact on always-on CAN wake-up circuits. |
| ADAS Camera Power Supply Protection | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards 12 V input to image sensor SoCs and ISP processors in front/rear-view cameras exposed to vehicle-level surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC/DC converters powering CMOS image sensors. Use Value: With 0.085 %/°C VBR tempco, maintains predictable clamping across −40 °C to +125 °C ambient camera housing environments. | Use Scenario: Protects high-current 12 V rail feeding three-phase gate drivers and current sense amplifiers in EPS motor control units. IC Role / Device Role / Timing Role: High-power TVS shunts load dump energy away from sensitive analog front-ends and PWM controllers. Use Value: 500 A IFSM rating and 2 V VF max at 100 A ensure safe conduction during repeated surge events without forward conduction loss. |
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), no AEC-Q101 qualification | Not suitable for automotive load dump; limited to industrial or consumer surges ≤100 W | Select only for cost-sensitive non-automotive designs where 3600 W surge immunity is unnecessary |
| SMCJ20A | Same DO-214AB package, PPPM = 1500 W, RθJC ≈ 2.5 °C/W, AEC-Q101 not claimed | Insufficient for ISO 7637-2 Pulse 5a; usable for lower-energy ISO 16750-2 transients | Consider if thermal budget allows higher junction rise and automotive qualification is not mandatory |
Compared with SMAJ20A and SMCJ20A, the TLD5S20AH provides 2.4× and 2.4× higher peak power handling respectively, full AEC-Q101 validation, and superior thermal resistance - making it the only option qualified for under-hood automotive load dump protection per OEM specifications.
Availability
TLD5S20AH is available at Aetrix Electronics and suitable for automotive power electronics, engine control units, and ADAS camera modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TLD5S20AH 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 Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The TLD5SxxAH series was developed specifically for high-reliability automotive transient suppression, targeting ISO 7637-2 load dump and ISO 16750-2 surge immunity in 12 V and 24 V systems.
FAQ
What is the maximum clamping voltage of the TLD5S20AH under standard surge conditions?
The TLD5S20AH has a maximum clamping voltage (VC) of 32.4 V when subjected to a 10/1000 μs waveform at IPPM = 111 A. This value is measured per IEC 61000-4-5 and ISO 7637-2 standards and ensures protected circuitry remains below critical overvoltage thresholds during automotive load dump events. The TLD5S20AH maintains this clamping performance across its full operating temperature range.
Is the TLD5S20AH qualified for automotive use per AEC-Q101?
Yes, the TLD5S20AH is fully AEC-Q101 qualified. It undergoes rigorous stress testing including high-temperature reverse bias, temperature cycling, and ESD per human-body model (HBM) and machine model (MM), with documented pass results. This qualification confirms suitability for automotive powertrain and chassis applications where reliability under extreme thermal and electrical stress is mandatory. The TLD5S20AH data sheet explicitly states AEC-Q101 compliance.
What package type does the TLD5S20AH use, and what are its thermal characteristics?
The TLD5S20AH uses the DO-218AB surface-mount package, featuring low thermal resistance of RθJC = 0.9 °C/W when mounted on an ideal heatsink. Its UL 94V-0 molding compound, matte tin-plated leads, and JESD201 Class 2 whisker resistance support automated assembly and long-term under-hood reliability. The TLD5S20AH's 2.677 g weight and standardized pad layout enable drop-in integration into automotive PCBs.
How does the TLD5S20AH compare to the TLD5S20A variant?
The TLD5S20AH is the tape-and-reel packaged version of the TLD5S20A, with identical electrical specifications, thermal performance, and mechanical construction. The "H" suffix denotes packaging format (750 pcs per reel), while the base part number TLD5S20A refers to the device itself. Both share the same DO-218AB case, VWM = 20.0 V, VBR = 22.2–24.5 V, and PPPM = 3600 W rating. The TLD5S20AH is the orderable part used in production SMT lines.
Does the TLD5S20AH meet ISO 10605 and IEC 61000-4-2 ESD immunity standards?
Yes, the TLD5S20AH meets IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and ISO 10605 Level L4 (±30 kV air, ±25 kV contact) ESD immunity requirements. These ratings are verified per the manufacturer's test reports and reflect the device's ability to safely clamp electrostatic discharges without degradation. The TLD5S20AH's junction passivation and low-leakage design contribute directly to its robust ESD performance across temperature extremes.
TLD5S20AH 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):
- 111A
- 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
TLD5S20AH FAQ
1.How can I place an order for TLD5S20AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD5S20AH 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 TLD5S20AH reliable?
The price and inventory of TLD5S20AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD5S20AH is usually 5 days.
3.What payment methods are accepted for TLD5S20AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD5S20AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD5S20AH?
TLD5S20AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD5S20AH 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 TLD5S20AH?
For technical support, including TLD5S20AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD5S20AH requirements.
6.How does Aetrix verify that TLD5S20AH is sourced from the original manufacturer or authorized distributors?
All TLD5S20AH 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 TLD5S20AH meets industry standards.
7.What is the process for return or replacement of TLD5S20AH?
All TLD5S20AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD5S20AH, 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 TLD5S20AH part is unused and in its original packaging.
Return procedure for TLD5S20AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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