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Taiwan Semiconductor Corporation 3KSMC19AH
- Part No.:
- 3KSMC19AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KSMC19AH.pdf
- Description:
- 3000W, 18.7V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
3KSMC19AH from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 19V nominal breakdown voltage (VBR = 17.8–19.6 V), 26.0V maximum clamping voltage (VC) at 115.4A peak pulse current, and 175°C maximum junction temperature - deployed for overvoltage protection in automotive BLDC motor drives.
For engineers reviewing the 3KSMC19AH datasheet, 3KSMC19AH pinout, 3KSMC19AH application, or 3KSMC19AH equivalent, key selection criteria include unidirectional polarity, IEC 61000-4-2 Level 4/ISO 10605 L4 ESD robustness, ISO 7637-2 Pulse 1/2a/2b/3a/3b surge compliance, AEC-Q101 qualification, and thermal resistance (RθJL = 17°C/W).
Technical Context
The 3KSMC19AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (17.8–19.6 V @ 1 mA). It clamps transients to ≤26.0 V at 115.4 A (10/1000 µs waveform), delivering 3000 W peak pulse power dissipation with RθJL = 17°C/W and RθJA = 50°C/W on a 16 mm × 16 mm Cu pad board.
Its design supports automotive-grade reliability: AEC-Q101 qualified, J-STD-020 moisture sensitivity level 1, JESD 201 Class 2 whisker resistance, and UL 94V-0 molding compound. Polarity is marked by cathode band; weight is 0.210 g.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.8 / 18.7 / 19.6 V @ 1 mA - defines precise reverse breakdown threshold for reliable turn-on during overvoltage events |
| VC @ IPPM | 26.0 V @ 115.4 A (10/1000 µs) - ensures downstream circuitry sees no more than 26 V during worst-case surge |
| PPPM | 3000 W - enables handling of high-energy transients per ISO 7637-2 Pulse 1, 2a, 2b, 3a, 3b |
| RθJL | 17 °C/W - allows efficient heat transfer from junction to lead, critical for sustained surge duty in confined PCB layouts |
| TJ max | +175 °C - supports operation in under-hood automotive environments without thermal derating penalties |
| IR @ VWM | ≤3 µA @ 16 V - guarantees minimal leakage in standby, preserving battery life in always-on systems |
| Package | DO-214AB (SMC) - industry-standard SMT footprint compatible with automated assembly and high-current routing |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional, cathode indicated by band. Weight: 0.210 g. Molding compound: UL 94V-0 rated. Leads: matte tin-plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); clamping occurs when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use, including engine control, body modules, and ADAS subsystems |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 compliance | Withstands ±15 kV air discharge and ±8 kV contact discharge without degradation |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity | Protects against load dump, inductive switching spikes, and supply line transients in 12 V vehicle networks |
| Halogen-free & RoHS compliant | Meets environmental regulations for automotive and industrial end-of-life recycling requirements |
Applications
| BLDC Motor Drive Protection | Automotive Lighting Control |
|---|---|
Use Scenario: Suppresses inductive kickback from gate drivers and H-bridge switching in 12 V BLDC fan/mirror/window actuators. IC Role / Device Role / Timing Role: Unidirectional TVS placed across motor terminals or MOSFET drains to clamp flyback voltage spikes. Use Value: Limits voltage to ≤26.0 V during 115.4 A surges, preventing MOSFET avalanche failure and ensuring ASIL-B functional safety integrity. | Use Scenario: Shields LED driver ICs and CAN/LIN communication lines from load dump and jump-start transients in headlamp/tail lamp modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input rail upstream of DC-DC converters and linear regulators. Use Value: Maintains <3 µA leakage at 16 V, minimizing quiescent current draw while surviving ISO 7637-2 Pulse 3b (±100 V, 150 ns rise). |
| Battery Management System (BMS) | On-Board Charger (OBC) Interface |
Use Scenario: Guards analog front-end (AFE) inputs and microcontroller I/O pins against ESD and coupling noise in 12 V auxiliary battery monitoring circuits. IC Role / Device Role / Timing Role: Localized TVS at sensor signal entry points (e.g., voltage dividers, thermistor nodes). Use Value: Provides 17.8–19.6 V VBR window aligned with 16 V system operating range, enabling precise clamping without false triggering. | Use Scenario: Protects isolated gate driver supplies and feedback optocoupler inputs from coupled transients during AC/DC conversion in PHEV/EV OBC units. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on low-voltage control rails (e.g., 12 V bias for SiC gate drivers). Use Value: Delivers 3000 W peak power handling with RθJL = 17°C/W, sustaining repeated surges without thermal runaway in compact heatsinkless designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ19A | Lower PPPM (600 W), same VBR range (17.1–18.9 V), SMB package (smaller footprint, higher RθJA) | Not suitable for ISO 7637-2 Pulse 1/2a/2b; limited to lower-energy ESD/surge scenarios | Select only if system-level surge energy is ≤600 W and space-constrained layout prohibits SMC size |
| 1.5KE19A | Higher VC (30.5 V), through-hole DO-201 package, 1500 W PPPM, no AEC-Q101 or automotive qualification | Lacks ISO 7637-2 and AEC-Q101 validation; unsuitable for automotive production | Consider only for non-automotive industrial prototypes where cost outweighs qualification requirements |
Compared with SMBJ19A and 1.5KE19A, the 3KSMC19AH uniquely combines 3000 W surge capability, AEC-Q101 qualification, and full ISO 7637-2 compliance in a surface-mount SMC package - making it the only option validated for production automotive BLDC and lighting systems requiring robust, standardized transient immunity.
Availability
3KSMC19AH is available at Aetrix Electronics and suitable for automotive BLDC motor drives, LED lighting control modules, battery management systems, and on-board charger interfaces requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 3KSMC19AH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive and industrial markets.
The 3KSMCxxAH series was engineered specifically for AEC-Q101-compliant automotive transient suppression, targeting 12 V network applications subject to ISO 7637-2 and IEC 61000-4-2 stress conditions.
FAQ
What is the maximum clamping voltage of the 3KSMC19AH at its rated peak pulse current?
The 3KSMC19AH has a maximum clamping voltage (VC) of 26.0 V at 115.4 A peak pulse current (10/1000 µs waveform). This value is measured under standard test conditions (TA = 25°C) and reflects the upper limit of voltage seen by protected circuitry during worst-case surge events. The 3KSMC19AH maintains this clamping performance across its qualified operating temperature range, supporting robust design margins in automotive applications.
Is the 3KSMC19AH suitable for use in automotive applications requiring AEC-Q101 qualification?
Yes, the 3KSMC19AH is explicitly AEC-Q101 qualified per the manufacturer's datasheet (Version B2012). It meets all required stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. This qualification confirms its suitability for automotive powertrain, chassis, and body electronics where long-term reliability under harsh environmental conditions is mandatory - a key differentiator of the 3KSMC19AH versus generic TVS diodes.
What is the marking code printed on the 3KSMC19AH device body?
The 3KSMC19AH is marked with "3K19A" on its case. This marking code appears adjacent to the cathode band and is consistent across production lots per the ordering information table in the official datasheet. The "3K" prefix denotes the 3000 W power rating, "19" indicates the 19 V nominal breakdown voltage, and "A" signifies the AEC-Q101 qualified variant - enabling quick visual identification and traceability during assembly and field service.
Does the 3KSMC19AH meet IEC 61000-4-2 and ISO 10605 ESD immunity standards?
Yes, the 3KSMC19AH meets IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and ISO 10605 Level L4 (±15 kV air, ±8 kV contact) ESD immunity requirements. These ratings are confirmed in the "Features" section of the official datasheet and verified through standardized testing protocols. As a result, the 3KSMC19AH provides certified protection for sensitive electronics in automotive infotainment, lighting, and body control modules exposed to human-body-model ESD events.
What is the thermal resistance from junction to lead (RθJL) for the 3KSMC19AH?
The junction-to-lead thermal resistance (RθJL) of the 3KSMC19AH is 17°C/W, measured under standard test conditions using a 16 mm × 16 mm copper pad PCB. This low thermal resistance enables efficient heat extraction through the leads during repetitive surge events, reducing thermal stress on the silicon die. For thermal design, this value must be used alongside RθJA = 50°C/W to calculate safe operating limits - especially critical in sealed automotive enclosures where ambient temperatures exceed 85°C.
3KSMC19AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V (Max)
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 115.4A
- Power - Peak Pulse:
- 3000W (3kW)
- 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-214AB (SMC)
3KSMC19AH FAQ
1.How can I place an order for 3KSMC19AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KSMC19AH 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 3KSMC19AH reliable?
The price and inventory of 3KSMC19AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KSMC19AH is usually 5 days.
3.What payment methods are accepted for 3KSMC19AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KSMC19AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KSMC19AH?
3KSMC19AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KSMC19AH 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 3KSMC19AH?
For technical support, including 3KSMC19AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KSMC19AH requirements.
6.How does Aetrix verify that 3KSMC19AH is sourced from the original manufacturer or authorized distributors?
All 3KSMC19AH 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 3KSMC19AH meets industry standards.
7.What is the process for return or replacement of 3KSMC19AH?
All 3KSMC19AH units undergo pre-shipment inspection (PSI). If there is an issue with 3KSMC19AH, 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 3KSMC19AH part is unused and in its original packaging.
Return procedure for 3KSMC19AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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