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Vishay General Semiconductor - Diodes Division 3KASMC16HE3/9AT
- Part No.:
- 3KASMC16HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC16HE3/9AT.pdf
- Description:
- TVS DIODE 16VWM 28.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,706
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Product details
Overview
3KASMC16HE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 115 A peak surge current (IPPM), and 185 °C maximum junction temperature - deployed for automotive-grade ESD and load-dump protection on power rails and signal lines of engine control units and sensor interfaces.
For engineers reviewing the 3KASMC16HE3/9AT datasheet, 3KASMC16HE3/9AT pinout, 3KASMC16HE3/9AT application, or 3KASMC16HE3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, uni-directional clamping behavior, low 26.0 V clamping voltage at 115 A, MSL Level 1 rating, and 185 °C TJ capability for under-hood automotive environments.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance across -65 °C to +185 °C operating range, with thermal resistance RθJA = 77.5 °C/W and RθJL = 18.3 °C/W. Its 10/1000 μs waveform response enables robust suppression of inductive switching transients and ISO 7637-2 pulse 1/2a/5a surges.
The device operates exclusively in uni-directional mode, with cathode denoted by color band, and exhibits 1.0 μA max reverse leakage at 16 V (VWM) and 1.0 μA at TJ = 150 °C - ensuring minimal standby power loss in always-on automotive circuits while maintaining fast response time and low incremental surge resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12 V automotive systems. |
| VBR (min/max) | 17.8 V / 19.7 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 26.0 V at 115 A - Clamping voltage under full 3000 W surge; limits downstream IC stress to safe levels. |
| PPPM | 3000 W (10/1000 μs) - Peak transient energy handling capacity suitable for ISO 16750-2 load-dump simulation. |
| TJ max. | +185 °C - Enables placement near high-temperature sources (e.g., powertrain ECUs) without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements including HTGB, HTRB, and TCT. |
| MSL Level | Level 1 (260 °C peak reflow) - Supports standard SMT assembly without moisture sensitivity concerns. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; carries full surge current during clamping. |
| Cathode | High-side connection point | Connected to protected line (e.g., battery rail); voltage referenced to anode during forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and leakage over lifetime and temperature. |
| Clamping performance | 26.0 V clamping at 115 A enables reliable protection of 24 V-rated components in 12 V/24 V dual-battery systems. |
| Thermal robustness | 185 °C TJ rating supports operation in engine compartment locations without external heatsinking. |
| Surge reliability | 200 A IFSM (8.3 ms half-sine) withstands repeated cranking-induced surges without degradation. |
| Assembly compatibility | MSL Level 1 and J-STD-002/JESD 22-B102 solderability ensure first-pass yield in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppresses ISO 7637-2 Pulse 5a (load dump) transients on 12 V battery-fed power inputs of body control modules. IC Role / Device Role / Timing Role: Uni-directional TVS clamps positive-going overvoltage spikes to protect LDOs, microcontrollers, and CAN transceivers. Use Value: Limits peak rail voltage to ≤26.0 V during 3000 W surges, preventing latch-up or permanent damage to downstream silicon. |
Use Scenario: Guards 5 V or 3.3 V internal supply rails in engine control units against coupled transients from ignition coils and fuel injectors. IC Role / Device Role / Timing Role: Fast-response TVS shunts inductive kickback before it propagates through local regulators. Use Value: 115 A IPPM and 26.0 V VC ensure sub-100 ns clamping response preserves timing-critical MCU operation. |
| Sensor Signal Line Protection | Industrial Motor Drive Interface |
Use Scenario: Protects analog and digital outputs of pressure, temperature, and position sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed at connector interface to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: 1.0 μA IR at 16 V minimizes signal distortion on high-impedance sensor outputs. |
Use Scenario: Shields RS-485/RS-232 communication lines and gate driver enable signals in variable-frequency drives subject to motor cable reflections. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs repetitive 10/1000 μs transients induced by IGBT switching noise. Use Value: AEC-Q101 qualification and 185 °C TJ rating allow direct mounting on drive PCBs near heat-generating power stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Lower PPPM (400 W), lower IPPM (32.4 A), same VWM/VBR range, SMA package (smaller thermal mass) | Not qualified to AEC-Q101; limited to consumer/industrial use where automotive reliability not required | Select when cost-sensitive non-automotive designs need basic 16 V clamping with smaller footprint. |
| 1.5KE16A | Higher power (1500 W), axial leaded DO-201 package, higher VF, no AEC-Q101 or MSL Level 1 rating | Requires through-hole assembly; unsuitable for automated SMT or high-reliability automotive environments | Choose only for legacy board upgrades or prototyping where leaded parts are acceptable and reflow compatibility is not needed. |
Compared with SMAJ16A and 1.5KE16A, the 3KASMC16HE3/9AT delivers 7.5× higher peak power handling, automotive-grade qualification, and SMT-ready packaging - making it the sole option for production automotive electronics requiring validated 185 °C operation and ISO 7637-2 compliance.
Availability
3KASMC16HE3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit input hardening, and sensor signal line ESD suppression requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 3KASMC16HE3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and TVS devices with emphasis on high-reliability, high-temperature, and automotive-qualified solutions.
The 3KASMC series was engineered specifically for under-hood automotive applications demanding AEC-Q101 compliance, 185 °C operation, and robust 3000 W transient suppression - targeting ECU, ADAS, and electrified powertrain subsystems.
FAQ
What is the clamping voltage of the 3KASMC16HE3/9AT under full-rated surge current?
The 3KASMC16HE3/9AT has a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current (IPPM) of 115 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuitry downstream of the device.
Is the 3KASMC16HE3/9AT qualified for automotive applications?
Yes, the 3KASMC16HE3/9AT is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature, making it suitable for automotive powertrain, chassis, and body electronics. It meets MSL Level 1 per J-STD-020 and is RoHS-compliant with halogen-free construction per JEDEC JS709A.
What package type does the 3KASMC16HE3/9AT use, and what are its key mechanical features?
The 3KASMC16HE3/9AT uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads, UL 94 V-0 flammability rating, and cathode indicated by a color band. Its dimensions are 6.22 mm × 5.59 mm × 2.90 mm, and it supports standard reflow profiles up to 260 °C peak temperature.
How does the 3KASMC16HE3/9AT differ from the SMAJ16A in terms of surge capability?
The 3KASMC16HE3/9AT delivers 3000 W peak pulse power (10/1000 μs) versus 400 W for the SMAJ16A - a 7.5× higher energy absorption capacity. It also supports 115 A IPPM compared to 32.4 A, and is AEC-Q101 qualified, whereas the SMAJ16A lacks automotive qualification and thermal rating.
What is the reverse leakage current specification for the 3KASMC16HE3/9AT at operating temperature?
The 3KASMC16HE3/9AT specifies a maximum reverse leakage current (IR) of 1.0 μA at 16 V (VWM) and 25 °C, and maintains ≤1.0 μA even at TJ = 150 °C - critical for minimizing quiescent power loss in always-on automotive modules such as telematics and gateway ECUs.
3KASMC16HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 104A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
3KASMC16HE3/9AT FAQ
1.How can I place an order for 3KASMC16HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC16HE3/9AT 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 3KASMC16HE3/9AT reliable?
The price and inventory of 3KASMC16HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC16HE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC16HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC16HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC16HE3/9AT?
3KASMC16HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC16HE3/9AT 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 3KASMC16HE3/9AT?
For technical support, including 3KASMC16HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC16HE3/9AT requirements.
6.How does Aetrix verify that 3KASMC16HE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC16HE3/9AT 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 3KASMC16HE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC16HE3/9AT?
All 3KASMC16HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC16HE3/9AT, 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 3KASMC16HE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC16HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC16HE3/9AT Tags
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