My Inquiry
My Account
Taiwan Semiconductor Corporation TLD8S17CAH
- Part No.:
- TLD8S17CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD8S17CAH.pdf
- Description:
- 6600W, 19.9V, 5%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLD8S17CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-218AB package, designed for automotive load dump and surge protection. It features a 17.0 V working stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 5 mA, 27.6 V clamping voltage (VC) at 239 A peak impulse current, and 6600 W peak pulse power (10/1000 µs), operating up to TJ = 175 °C.
For engineers reviewing the TLD8S17CAH datasheet, TLD8S17CAH pinout, TLD8S17CAH application, or TLD8S17CAH equivalent, key selection criteria include unidirectional/bidirectional configuration, ISO 7637-2 compliance, junction temperature capability, clamping performance under load dump transients, and DO-218AB thermal resistance (RθJC = 0.8 °C/W).
Technical Context
The TLD8S17CAH is a bidirectional avalanche diode optimized for high-energy transient suppression in 12 V and 24 V automotive electrical systems. Its junction passivation design enables stable operation up to 175 °C junction temperature and meets ISO 16750-2 and ISO 7637-2 surge test requirements under defined conditions.
It delivers 6600 W non-repetitive peak pulse power with 10/1000 µs waveform and 5200 W with 10/10000 µs waveform, supported by low RθJC (0.8 °C/W) for effective heat transfer to the PCB or heatsink. The device exhibits a typical VBR temperature coefficient of 0.082 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold. |
| VBR (min/max) | 18.9 / 20.9 V at IT = 5 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 27.6 V at 239 A (10/1000 µs) - Clamped voltage seen by protected circuit; limits downstream stress during load dump. |
| PPPM (10/1000 µs) | 6600 W - Peak transient energy handling capacity; supports severe automotive load dump events per ISO 7637-2. |
| TJ max | 175 °C - Enables placement near hot engine-control electronics without derating concerns. |
| RθJC | 0.8 °C/W - Low thermal resistance from junction to case; allows efficient heat transfer to PCB copper or external heatsink. |
| αT | 0.082 %/°C - Predictable VBR drift with temperature; supports accurate clamping margin calculation across operating range. |
Pinout & Package
Package: DO-218AB - Surface-mount, 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 (Cathode Band Side) | Reference terminal for bidirectional clamping | Marked end defines polarity reference; both terminals conduct symmetrically during ± transients. |
| Cathode (Opposite Cathode Band) | Reference terminal for bidirectional clamping | Identical to anode in bidirectional configuration; no DC polarity dependency-enables AC or dual-rail surge protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD47. |
| ISO 7637-2 & ISO 16750-2 compliant | Tested to withstand Pulse 5a (load dump) and other automotive surge waveforms under specified mounting and layout conditions. |
| Junction passivation technology | Reduces leakage drift and improves long-term stability under high-temperature bias stress (TJ = 175 °C). |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 | Withstands 8 kV contact / 15 kV air ESD strikes and 30 kV component-level ESD per automotive standards. |
| Halogen-free & RoHS compliant | Meets EU environmental directives and automotive OEM material declarations (IMDS, ELV). |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Interface Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control units against load dump transients generated during alternator field-circuit interruption. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative surges on main power input, limiting voltage to ≤27.6 V during 239 A peak events. Use Value: Prevents damage to MCU, voltage regulators, and analog sensors downstream by maintaining safe clamping margin below IC absolute maximum ratings. | Use Scenario: Shields CAN transceivers and signal conditioning circuits in body control modules from coupled transients entering via shared power rails or chassis ground bounce. IC Role / Device Role / Timing Role: Acts as secondary surge clamp on 12 V VCC line feeding CAN interface ICs, complementing primary front-end filtering. Use Value: Ensures CAN communication integrity during cranking and load dump by holding rail voltage within transceiver operating range (typically 4.5–5.5 V) via upstream clamping. |
| Automotive Lighting Driver Supply Protection | ADAS Camera Module Power Rail Protection |
Use Scenario: Safeguards LED driver ICs and MOSFETs in headlamp and tail lamp assemblies exposed to battery disconnection surges. IC Role / Device Role / Timing Role: Placed directly at driver IC input, absorbing 6600 W pulses to prevent latch-up or gate oxide rupture in power switches. Use Value: Extends product lifetime in harsh thermal environments (up to 175 °C junction) while maintaining consistent clamping performance across temperature. | Use Scenario: Protects image sensor and ISP power supplies in forward-facing ADAS cameras subjected to repeated start-stop cycle surges. IC Role / Device Role / Timing Role: Mounted at camera module's main 12 V input, suppressing fast-rising transients before they couple into low-noise LDOs and analog front ends. Use Value: Reduces risk of image corruption or reset events by limiting transient-induced rail collapse and ensuring uninterrupted power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Lower PPPM (400 W), DO-214AC package, RθJC ≈ 50 °C/W, VBR = 18.9–20.9 V, VC = 27.6 V at 14.3 A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients (e.g., ESD, inductive kick) | Select SMAJ17CA only for cost-sensitive non-automotive applications where peak surge energy ≤400 W. |
| TPSMF17CA | Same DO-218AB package, AEC-Q101 qualified, PPPM = 6600 W, but VBR = 18.9–22.0 V and VC = 29.2 V at 227 A | Higher clamping voltage reduces margin for 5 V logic rails; slightly lower IPPM than TLD8S17CAH | TPSMF17CA is viable where board space matches and higher VC is acceptable; verify downstream IC tolerance. |
Compared with SMAJ17CA and TPSMF17CA, the TLD8S17CAH offers identical VBR and superior thermal performance (RθJC = 0.8 °C/W vs. ≥2.5 °C/W), enabling reliable operation under sustained high-temperature automotive conditions without derating.
Availability
TLD8S17CAH is available at Aetrix Electronics and suitable for automotive ECU power input protection, BCM CAN interface protection, and ADAS camera module power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TLD8S17CAH 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 with global distribution and AEC-Q101 validation capabilities.
The TLD8SxxCAH series is part of TSC's automotive-grade TVS platform, engineered specifically for high-energy load dump suppression in 12 V/24 V vehicle electrical architectures, emphasizing thermal robustness and standard compliance.
FAQ
What is the polarity configuration of the TLD8S17CAH?
The TLD8S17CAH is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients. Its DO-218AB package has no functional anode/cathode distinction in circuit operation-both terminals behave identically under reverse or forward surge conditions, making it ideal for AC-coupled or dual-polarity protection schemes.
Does the TLD8S17CAH meet AEC-Q101 qualification?
Yes, the TLD8S17CAH is explicitly AEC-Q101 qualified per the official Taiwan Semiconductor datasheet (Version E2310). This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and mechanical robustness, confirming suitability for automotive under-hood and chassis-mounted applications.
What is the maximum clamping voltage of the TLD8S17CAH under standard test conditions?
The TLD8S17CAH has a maximum clamping voltage (VC) of 27.6 V when subjected to a 10/1000 µs surge waveform at its rated peak impulse current of 239 A. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can the TLD8S17CAH be used in place of unidirectional TVS diodes like TLD8S17AH?
No-the TLD8S17CAH is bidirectional and not a drop-in replacement for the unidirectional TLD8S17AH. While both share identical VWM, VBR, and VC values, the unidirectional version conducts only in reverse bias and requires correct polarity orientation; substituting them without circuit review risks improper clamping or forward conduction failure.
What is the thermal resistance from junction to case (RθJC) for the TLD8S17CAH?
The TLD8S17CAH has a typical junction-to-case thermal resistance (RθJC) of 0.8 °C/W, measured with an ideal heatsink. This low value enables efficient heat dissipation during high-energy transients and supports reliable operation at TJ = 175 °C, especially when mounted on thermally enhanced PCB pads per the recommended DO-218AB layout.
TLD8S17CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 239A
- 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
TLD8S17CAH FAQ
1.How can I place an order for TLD8S17CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD8S17CAH 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 TLD8S17CAH reliable?
The price and inventory of TLD8S17CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S17CAH is usually 5 days.
3.What payment methods are accepted for TLD8S17CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S17CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD8S17CAH?
TLD8S17CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD8S17CAH 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 TLD8S17CAH?
For technical support, including TLD8S17CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S17CAH requirements.
6.How does Aetrix verify that TLD8S17CAH is sourced from the original manufacturer or authorized distributors?
All TLD8S17CAH 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 TLD8S17CAH meets industry standards.
7.What is the process for return or replacement of TLD8S17CAH?
All TLD8S17CAH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S17CAH, 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 TLD8S17CAH part is unused and in its original packaging.
Return procedure for TLD8S17CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLD8S17CAH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
