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Vishay General Semiconductor - Diodes Division 3KASMC14HE3_A/H
- Part No.:
- 3KASMC14HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14HE3_A/H.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,425
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Product details
Overview
3KASMC14HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 14 V stand-off voltage, 15.6–17.2 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 23.2 V clamping voltage at 129 A surge current, and 185 °C maximum junction temperature - deployed for automotive sensor line protection against inductive switching transients.
For engineers reviewing the 3KASMC14HE3_A/H datasheet, 3KASMC14HE3_A/H pinout, 3KASMC14HE3_A/H application, or 3KASMC14HE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 185 °C thermal capability, and DO-214AB mechanical compatibility with high-reliability automotive PCB layouts.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and elevated ambient temperatures up to 150 °C. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and load-dump transients on sensitive signal paths.
The device operates exclusively in unidirectional mode with cathode marked by a band, requires no bias circuitry, and delivers consistent clamping performance across its full operating temperature range (–65 °C to +185 °C) without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum reverse stand-off voltage before significant leakage; defines safe operating margin below breakdown in normal circuit operation. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power handling capacity; supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| VC @ IPPM | 23.2 V at 129 A - Clamping voltage under max surge; limits downstream IC stress to safe levels during transient events. |
| TJ max | +185 °C - Enables use in under-hood automotive environments and high-power industrial enclosures without thermal derating penalties. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors, including HTGB, HTRB, and TCT. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; can be stored indefinitely and reflowed at 260 °C peak without preconditioning. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Complies with UL 94 V-0 flammability rating and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or reference node; completes conduction path during reverse-biased transient clamp. |
| Cathode | High-side connection point | Marked by color band; connects to protected line (e.g., sensor supply or signal); conducts when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces leakage drift and improves long-term stability at 150 °C. |
| Clamping ratio (VC/VBR) | ~1.47 - Low ratio ensures minimal overvoltage overshoot during surge events, critical for 3.3 V/5 V logic interface protection. |
| Thermal resistance RθJA | 77.5 °C/W - Enables direct PCB mounting without heatsink for moderate-duty surge profiles in space-constrained modules. |
| Surge current IFSM | 200 A (8.3 ms half-sine) - Supports single-event load dump immunity per ISO 16750-2 without degradation. |
| RoHS & Halogen-Free | Compliant per JEDEC JS709A and Directive 2011/65/EU - Meets automotive OEM material declaration and recycling requirements. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) sensors from inductive kickback during solenoid actuation. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤23.2 V, preventing latch-up or damage to 5 V-tolerant SAR ADC inputs while maintaining signal integrity. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller (PLC) modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point, upstream of optocoupler isolation. Use Value: Absorbs 3000 W pulses without failure, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity testing. |
| Telecom Power Rail Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding 12 V DC-DC converter outputs in base station remote radio units (RRUs) from lightning-induced surges on backhaul power feeds. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated power rail, coordinated with upstream MOV and fuse. Use Value: Fast 129 A response clamps within nanoseconds, limiting voltage excursion to protect buck controller ICs and gate drivers. |
Use Scenario: Suppressing commutation spikes on brushed DC motor power lines in smart washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to shunt inductive energy during MOSFET turn-off. Use Value: Withstands 200 A surge (8.3 ms) and 185 °C junction temperature, ensuring reliability across repeated motor start-stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A | Same VWM (14 V), lower PPPM (600 W), DO-214AA (SMB) package (smaller footprint, higher RθJA). | Lower surge capacity suits consumer-grade 24 V systems; not AEC-Q101 qualified. | Select SMBJ14A only for cost-sensitive non-automotive designs where 600 W peak power suffices. |
| 1.5KE14A | Through-hole TO-204AE (DO-41), 1500 W PPPM, higher VC (25.5 V), no AEC-Q101 or MSL Level 1 rating. | Requires wave soldering; unsuitable for automated SMT lines or high-reliability automotive use. | Choose 1.5KE14A only for legacy through-hole designs or prototyping where board real estate is unconstrained. |
Compared with SMBJ14A and 1.5KE14A, the 3KASMC14HE3_A/H provides triple the surge power, automotive qualification, and surface-mount reliability - making it the sole choice for production AEC-Q101-compliant modules requiring sustained 185 °C operation.
Availability
3KASMC14HE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer appliance motor drives requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 3KASMC14HE3_A/H 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for AEC-Q101-compliant transient suppression in harsh-temperature automotive and industrial environments.
FAQ
What is the exact breakdown voltage range for the 3KASMC14HE3_A/H?
The 3KASMC14HE3_A/H has a guaranteed breakdown voltage range of 15.6 V to 17.2 V at 1 mA test current, as specified in the Vishay datasheet document 89962. This range ensures reliable turn-on behavior during overvoltage events while maintaining adequate margin above its 14 V stand-off rating. The 3KASMC14HE3_A/H exhibits tight VBR distribution typical of Vishay's PAR® process control.
Is the 3KASMC14HE3_A/H suitable for automotive applications?
Yes, the 3KASMC14HE3_A/H is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature, making it fully suitable for under-hood and transmission-control module applications. It meets automotive reliability stress tests including HTGB, HTRB, and temperature cycling. The 3KASMC14HE3_A/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What does the "_A/H" suffix mean in 3KASMC14HE3_A/H?
The "_A/H" suffix in 3KASMC14HE3_A/H indicates a 7-inch plastic tape-and-reel packaging option with 850 units per reel and Vishay's HM3 base part designation (RoHS-compliant, AEC-Q101 qualified). The "A" denotes revision level; "H" specifies the preferred package code per Vishay's ordering nomenclature in document 89962.
Does the 3KASMC14HE3_A/H have bidirectional polarity?
No, the 3KASMC14HE3_A/H is unidirectional only, as confirmed in the Vishay datasheet features section and electrical characteristics table. It functions as a reverse-biased avalanche diode, with cathode marked by a band. Bidirectional variants are not offered in the 3KASMCxxA family - the 3KASMC14HE3_A/H must be oriented correctly in-circuit to protect against positive-going transients on the cathode side.
What is the clamping voltage of the 3KASMC14HE3_A/H at its rated surge current?
The 3KASMC14HE3_A/H clamps to a maximum of 23.2 V at its peak pulse current of 129 A (10/1000 μs waveform), per the Vishay datasheet Table "ELECTRICAL CHARACTERISTICS". This clamping voltage directly determines the maximum stress imposed on downstream components and is validated across temperature and production lots for the 3KASMC14HE3_A/H.
3KASMC14HE3_A/H 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 116A
- 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)
3KASMC14HE3_A/H FAQ
1.How can I place an order for 3KASMC14HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14HE3_A/H 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 3KASMC14HE3_A/H reliable?
The price and inventory of 3KASMC14HE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC14HE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC14HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14HE3_A/H?
3KASMC14HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14HE3_A/H 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 3KASMC14HE3_A/H?
For technical support, including 3KASMC14HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14HE3_A/H requirements.
6.How does Aetrix verify that 3KASMC14HE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC14HE3_A/H 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 3KASMC14HE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC14HE3_A/H?
All 3KASMC14HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14HE3_A/H, 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 3KASMC14HE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC14HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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