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Vishay General Semiconductor - Diodes Division 3KASMC30AHE3_B/I
- Part No.:
- 3KASMC30AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC30AHE3_B/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,003
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Product details
Overview
3KASMC30AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown (VBR), and 3000 W peak pulse power (10/1000 μs). It delivers 62.0 A peak surge current (IPPM) and clamps to 48.4 V at that level, with 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC30AHE3_B/I datasheet, 3KASMC30AHE3_B/I pinout, 3KASMC30AHE3_B/I application, or 3KASMC30AHE3_B/I equivalent, key selection criteria include unidirectional clamping behavior, AEC-Q101 qualification, 3000 W surge capability, thermal resistance (RθJA = 77.5 °C/W), and compatibility with high-reliability automotive and industrial PCB layouts requiring MSL Level 1 reflow.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its unidirectional architecture provides low forward voltage (VF = 3.5 V at 100 A) and fast response time, enabling effective suppression of inductive switching transients before downstream ICs are damaged.
Rated for TJ = –65 °C to +185 °C operation and qualified to AEC-Q101, the 3KASMC30AHE3_B/I supports automotive applications where thermal cycling, long-term reliability, and solderability (J-STD-002/JESD 22-B102 compliant matte tin leads) are critical. The SMC package enables high-power dissipation (PD = 6.0 W on infinite heatsink) without external heat sinking in constrained board space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/typ/max) | 33.3 / 35.1 / 36.8 V at 1.0 mA - Precise breakdown threshold ensures predictable turn-on during transients. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump and inductive kick events. |
| VC @ IPPM | 48.4 V at 62.0 A - Clamping voltage limits stress on protected ICs; <1.6× VWM confirms strong suppression ratio. |
| TJ max. | +185 °C - Enables placement near hot components (e.g., power MOSFETs, engine control units) without derating. |
| RθJA | 77.5 °C/W - Predictable thermal rise under sustained power dissipation; validates use on standard FR-4 with recommended pad layout. |
| AEC-Q101 | Qualified - Meets automotive-grade reliability requirements for vibration, temperature cycling, and humidity exposure. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, cathode indicated by color band. Dimensions: 7.11 mm × 6.22 mm × 2.90 mm (L × W × H); RoHS-compliant, halogen-free option available (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected circuit node (e.g., signal line or power rail); accepts surge current into device. |
| Cathode | Current exit terminal during clamping | Connected to ground or low-impedance return path; polarity marking (band) prevents reverse installation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term leakage stability under thermal stress. |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; no baking required pre-assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns), enhancing protection fidelity for sensitive ICs. |
| Matte tin plated leads | Ensures reliable solder wetting and intermetallic formation per J-STD-002; passes JESD 22-B102 solderability test. |
| Color-band polarity marking | Enables visual verification of cathode orientation during automated optical inspection (AOI) and manual rework. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails in body control modules against load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits voltage excursion to ≤48.4 V during 3000 W surges, preventing latch-up or gate oxide damage in downstream regulators. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground, adjacent to connector interface. Use Value: Clamps sub-100 ns ESD pulses to safe levels while maintaining signal integrity due to minimal parasitic capacitance. |
| Motor Drive Gate Protection | Telecom Line Card Surge Suppression |
Use Scenario: Safeguarding high-side N-channel MOSFET gates in BLDC motor controllers exposed to inductive flyback. IC Role / Device Role / Timing Role: TVS placed between gate and source, absorbing negative-going spikes induced by rapid dV/dt switching. Use Value: Prevents gate oxide breakdown with 3.5 V forward voltage drop and 185 °C operation near hot power stages. |
Use Scenario: Front-end protection for Ethernet PHY interfaces in outdoor base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary unidirectional clamp on DC bias feed line before choke and transformer. Use Value: Handles 62.0 A peak current with stable clamping across –65 °C to +185 °C ambient, meeting IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3_A/H | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range, non-AEC-Q101 | Suitable for consumer-grade, non-automotive designs with lower surge energy requirements | Select when cost and board space are prioritized over automotive qualification and 3000 W capability |
| SMCJ30AHE3_A/H | Same SMC package and 3000 W rating, but higher VBR (33.3–36.8 V vs. 33.3–36.8 V identical), identical AEC-Q101 status | Functionally interchangeable; differs only in traceability coding and reel packaging (H vs. I) | Choose for identical electrical performance with alternate tape-and-reel delivery (850 vs. 3500 pcs/reel) |
Compared with 3KASMC30AHE3_B/I, SMAJ30AHE3_A/H offers reduced surge robustness and no automotive qualification, while SMCJ30AHE3_A/H matches all key ratings and qualification - differing only in ordering code and packaging configuration, not electrical or mechanical design.
Availability
3KASMC30AHE3_B/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, motor drive gate protection, and telecom line card surge suppression requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 3KASMC30AHE3_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 devices, and optoelectronics with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments, delivering 3000 W surge capability in the rugged SMC package with extended junction temperature range.
FAQ
What is the peak pulse power rating of the 3KASMC30AHE3_B/I and under what waveform condition is it specified?
The 3KASMC30AHE3_B/I has a peak pulse power rating of 3000 W, measured using the standardized 10/1000 μs double-exponential waveform defined in ANSI/IEEE C62.35. This rating reflects its ability to absorb high-energy transients such as automotive load dump or inductive switching spikes without failure, provided the device is mounted on the recommended pad layout and operated within its thermal limits.
Is the 3KASMC30AHE3_B/I qualified for automotive applications, and what standard does it meet?
Yes, the 3KASMC30AHE3_B/I is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - ensuring reliability in under-hood and powertrain applications where the 3KASMC30AHE3_B/I is commonly deployed for power rail and signal line protection.
What is the clamping voltage of the 3KASMC30AHE3_B/I at its maximum rated surge current?
The 3KASMC30AHE3_B/I clamps to a maximum of 48.4 V when subjected to its rated peak pulse current of 62.0 A (IPPM), measured under the 10/1000 μs waveform. This clamping voltage is critical for protecting downstream components - for example, ensuring that a 3.3 V or 5 V microcontroller's I/O remains below absolute maximum ratings during transient events.
Does the 3KASMC30AHE3_B/I have a unidirectional or bidirectional configuration, and how is polarity identified?
The 3KASMC30AHE3_B/I is a unidirectional TVS diode, meaning it conducts only during reverse-biased overvoltage events. Polarity is identified by a distinct cathode band printed on the SMC package body - the banded end connects to ground or the low-impedance reference node, while the unbanded end connects to the protected line.
What is the maximum operating junction temperature for the 3KASMC30AHE3_B/I, and why is this significant in automotive design?
The 3KASMC30AHE3_B/I supports a maximum junction temperature of +185 °C, which exceeds typical under-hood ambient temperatures and allows placement near high-power components like MOSFETs or DC-DC converters without thermal derating. This capability directly supports compliance with automotive thermal design standards and extends system-level reliability in engine control units and battery management systems.
3KASMC30AHE3_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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
3KASMC30AHE3_B/I FAQ
1.How can I place an order for 3KASMC30AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC30AHE3_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 3KASMC30AHE3_B/I reliable?
The price and inventory of 3KASMC30AHE3_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 3KASMC30AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC30AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC30AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC30AHE3_B/I?
3KASMC30AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC30AHE3_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 3KASMC30AHE3_B/I?
For technical support, including 3KASMC30AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC30AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC30AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC30AHE3_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 3KASMC30AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC30AHE3_B/I?
All 3KASMC30AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC30AHE3_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 3KASMC30AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC30AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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