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Vishay General Semiconductor - Diodes Division 3KASMC14AHE3_B/I
- Part No.:
- 3KASMC14AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC14AHE3_B/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC14AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) 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), and 185 °C maximum junction temperature. It protects MOSFETs and sensor signal lines in automotive powertrain control modules against inductive switching transients.
For engineers reviewing the 3KASMC14AHE3_B/I datasheet, 3KASMC14AHE3_B/I pinout, 3KASMC14AHE3_B/I application, or 3KASMC14AHE3_B/I equivalent, key selection criteria include clamping voltage (23.2 V at 129 A), unidirectional polarity, AEC-Q101 qualification, and thermal resistance (RθJA = 77.5 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for high-reliability operation up to TJ = 185 °C. Its clamping performance is characterized by low incremental surge resistance and fast response time, enabling effective suppression of fast-rising transients induced by inductive load switching.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 - confirmed by the HE3 suffix and "B" revision code in the ordering designation 3KASMC14AHE3_B/I.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum reverse stand-off voltage before significant leakage; defines operating margin below clamping threshold in normal circuit conditions. |
| VBR (min/typ/max) | 15.6 / 16.4 / 17.2 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on behavior across production lot and temperature. |
| VC @ IPPM | 23.2 V at 129 A (10/1000 μs) - Clamping voltage directly limits peak stress on protected downstream ICs during surge events. |
| PPPM | 3000 W - Peak pulse power rating determines survivability under standardized lightning/surge waveforms without degradation. |
| TJ max. | 185 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures without derating. |
| RθJA | 77.5 °C/W - Thermal resistance value assumes mounting on minimum recommended pad layout; guides heatsinking and layout design. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, cathode indicated by color band. Dimensions: 6.22 mm × 5.59 mm × 2.46 mm (L × W × H), with 3.20 mm minimum cathode-to-anode distance and 1.52 mm minimum lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV exceeds VBR; polarity must match system reference. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes conduction path during clamping; requires low-inductance connection for effective transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and body electronics; eliminates need for additional qualification testing in Tier-1 designs. |
| 185 °C junction capability | Supports operation in high-ambient environments (e.g., engine bay, motor controllers) without thermal derating penalties. |
| 3000 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 surge test levels common in 12 V/24 V vehicle systems. |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage stress on protected devices compared to higher-ratio TVS devices, improving system robustness. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-related popcorn failure or delamination risk. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting gate drivers and current-sense amplifiers in 48 V mild-hybrid DC/DC converters from load dump and inductive kickback. IC Role / Device Role: Unidirectional transient suppressor placed across MOSFET drain-source or gate-source nodes. Use Value: Limits transient voltage to ≤23.2 V during 129 A surges, preventing latch-up or oxide rupture in SiC/GaN driver ICs. |
Use Scenario: Shielding encoder interface lines and Hall-effect sensor inputs in servo drives exposed to EMI from PWM inverters. IC Role / Device Role: Signal-line TVS mounted adjacent to connector entry points on PCB. Use Value: Clamps fast-edge noise (tr < 1 ns) with sub-100 ps response, preserving signal integrity while meeting IEC 61800-3 immunity requirements. |
| Automotive ADAS Camera Modules | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding FPD-Link III serializer/deserializer pairs in rear-view camera systems against cable discharge events. IC Role / Device Role: Bidirectional protection not applicable; this unidirectional device used on supply rail only (VCC to GND). Use Value: Withstands repeated 3000 W pulses without parameter shift, ensuring long-term reliability in 15-year automotive service life. |
Use Scenario: Front-end surge suppression on -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role: Primary clamping element in multi-stage protection scheme upstream of DC/DC converters. Use Value: Delivers 23.2 V clamping at 129 A with RθJL = 18.3 °C/W, enabling efficient heat transfer to copper pour without external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), VC = 23.2 V at 17.3 A - not rated for 129 A surge. | Restricted to low-energy consumer electronics; insufficient for automotive load dump or industrial motor drive surges. | Select only for space-constrained non-automotive applications where peak current < 20 A and AEC-Q101 is not required. |
| SMCJ14AHE3_A/H | Same SMC package and electrical specs, but "A" revision and 7″ tape (H); no documented difference in performance or qualification status. | Identical functional use; differs only in packaging format and revision code - not a technical alternative but a logistics variant. | Prefer 3KASMC14AHE3_B/I for 13″ reel volume builds requiring AEC-Q101 traceability and latest revision (B) per Vishay doc #88480 rev 19-Jan-2024. |
Compared with SMAJ14A-E3/5AT and SMCJ14AHE3_A/H, the 3KASMC14AHE3_B/I delivers 7.5× higher peak pulse power in the same SMC footprint, includes explicit AEC-Q101 qualification evidence via HE3 suffix and B revision, and supports full 129 A surge current - making it the only option validated for under-hood automotive deployment.
Availability
3KASMC14AHE3_B/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power supply input stage applications requiring stable component supply, AEC-Q101 compliance, and high-temperature operational assurance.
Supply support for 3KASMC14AHE3_B/I 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 3KASMC series belongs to Vishay's PAR® (Protection and Regulation) family, engineered specifically for high-energy transient suppression in harsh-environment applications including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the clamping voltage of the 3KASMC14AHE3_B/I and how is it measured?
The 3KASMC14AHE3_B/I has a maximum clamping voltage (VC) of 23.2 V, measured at a peak pulse current (IPPM) of 129 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and production lots per Vishay document #88480, and represents the upper limit of voltage seen by protected circuitry during surge events.
Is the 3KASMC14AHE3_B/I AEC-Q101 qualified, and what does the HE3 suffix indicate?
Yes, the 3KASMC14AHE3_B/I is AEC-Q101 qualified - confirmed by the HE3 suffix in its part number and documentation in Vishay's 88480 datasheet. The HE3 suffix denotes RoHS-compliant, matte tin-plated leads, JESD201 Class 2 whisker resistance, and full AEC-Q101 stress test compliance, including high-temperature operating life and temperature cycling.
What is the thermal resistance of the 3KASMC14AHE3_B/I, and how does it affect PCB layout?
The 3KASMC14AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W, specified for mounting on the minimum recommended pad layout per the datasheet. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area (≥ 100 mm² per terminal) and avoid thermal isolation - otherwise, actual RθJA will exceed this value and reduce surge endurance.
Can the 3KASMC14AHE3_B/I be used in bidirectional configurations?
No, the 3KASMC14AHE3_B/I is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts surge current only from cathode to anode and must be oriented with the banded end toward the protected line. For bidirectional protection, a separate device such as the 3KASMC14CAHE3_B/I would be required - the "C" in the part number denotes bidirectional construction.
What does the "B/I" suffix in 3KASMC14AHE3_B/I signify?
The "B" denotes the revision level per Vishay's internal change control (document #88480, revision 19-Jan-2024), confirming alignment with the latest electrical and qualification specifications. The "I" indicates packaging in 13″ diameter plastic tape and reel, with a base quantity of 3500 units - distinct from the "H" suffix used for 7″ reels (850 units).
3KASMC14AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 129A
- 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 (SMC)
3KASMC14AHE3_B/I FAQ
1.How can I place an order for 3KASMC14AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC14AHE3_B/I 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 3KASMC14AHE3_B/I reliable?
The price and inventory of 3KASMC14AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC14AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC14AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC14AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC14AHE3_B/I?
3KASMC14AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC14AHE3_B/I 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 3KASMC14AHE3_B/I?
For technical support, including 3KASMC14AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC14AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC14AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC14AHE3_B/I 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 3KASMC14AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC14AHE3_B/I?
All 3KASMC14AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC14AHE3_B/I, 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 3KASMC14AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC14AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC14AHE3_B/I Tags
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