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Vishay General Semiconductor - Diodes Division 3KASMC11AHE3_B/H
- Part No.:
- 3KASMC11AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC11AHE3_B/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
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Product details
Overview
3KASMC11AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-reliability overvoltage protection. It features a 11.1 V minimum breakdown voltage (VBR), 11 V stand-off voltage (VWM), 3000 W peak pulse power (10/1000 μs), 185 °C maximum junction temperature, and AEC-Q101 qualification - deployed on automotive sensor signal lines and MOSFET gate drivers.
For engineers reviewing the 3KASMC11AHE3_B/H datasheet, 3KASMC11AHE3_B/H pinout, 3KASMC11AHE3_B/H application, or 3KASMC11AHE3_B/H equivalent, key selection criteria include clamping voltage (18.2 V at IPPM), low incremental surge resistance, unidirectional polarity, MSL Level 1 rating, and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive transients and high-temperature operation up to 185 °C. Its 10/1000 μs waveform response delivers 165 A peak pulse current (IPPM) with a maximum clamping voltage of 18.2 V, ensuring robust protection for sensitive downstream ICs.
The device operates exclusively in unidirectional mode with cathode-band polarity marking, and its thermal resistance (RθJL = 18.3 °C/W) supports reliable power dissipation when mounted on minimum recommended pad layout per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min) | 11.1 V at 1 mA - Ensures predictable turn-on threshold for transient suppression across temperature. |
| VC @ IPPM | 18.2 V - Clamping voltage during 3000 W surge; limits stress on protected circuitry. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; meets IEC 61000-4-5 Level 4. |
| TJ max | 185 °C - Enables use in under-hood automotive environments without derating penalties. |
| Polarity | Unidirectional - Protects against positive-going transients only; requires correct orientation in series with signal path. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.11 mm x 6.60 mm body and 3.20 mm cathode band width. |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events. |
| Cathode | Protected line connection | Connected to input signal or power rail being safeguarded; voltage clamping occurs between cathode and anode. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<5 μA at VWM) and long-term reliability under thermal cycling. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control modules and ADAS sensor interfaces. |
| MSL Level 1, peak reflow 260 °C | Supports standard lead-free SMT assembly without preconditioning or special handling. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system immunity. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach the IC input stage. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems) and prevents latch-up or permanent damage to 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay coils or solenoid drivers in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-response voltage clamp absorbing flyback energy from inductive loads switched by N-channel MOSFETs. Use Value: Limits induced voltage spikes to ≤18.2 V, preventing false triggering or destruction of 5 V logic-level inputs rated for 6 V absolute maximum. |
| Telecom Line Interface | Consumer Power Adapter Feedback Path |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller sense lines from ESD and lightning-induced surges in base station front-end circuits. IC Role / Device Role / Timing Role: Primary transient shunt on secondary-side data lines, coordinated with common-mode chokes and gas discharge tubes. Use Value: Achieves <1 ns response time and clamps 1 kV EFT bursts to safe levels while preserving signal bandwidth up to 100 MHz. | Use Scenario: Securing optocoupler feedback paths in AC/DC adapters against output overvoltage faults and transformer ringing. IC Role / Device Role / Timing Role: Secondary-side TVS suppressing transient coupling from primary-side MOSFET switching noise into TL431-based regulation loops. Use Value: Prevents false overvoltage shutdown by limiting feedback node excursions to ≤18.2 V, maintaining stable 5 V/12 V output regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11AHE3_A/H | Lower PPPM (600 W), same VWM/VBR, SMB package (smaller footprint, higher RθJA) | Not suitable for 3000 W surge environments; limited to consumer-grade or low-energy industrial signals | Select when board space is constrained and peak surge energy is ≤600 W (e.g., USB port protection). |
| 1.5KE11A | Through-hole DO-201 package, same VWM/VBR, 1500 W PPPM, no AEC-Q101 qualification | Lacks automotive qualification and surface-mount compatibility; requires wave soldering or hand assembly | Choose for legacy through-hole designs where rework tolerance and cost outweigh automotive compliance needs. |
Compared with SMBJ11AHE3_A/H and 1.5KE11A, the 3KASMC11AHE3_B/H delivers triple the surge power rating in a qualified SMT package, enabling single-device protection for demanding automotive and industrial applications without compromising layout flexibility or thermal performance.
Availability
3KASMC11AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive protection, and telecom infrastructure requiring stable component supply with AEC-Q101 validation and RoHS compliance.
Supply support for 3KASMC11AHE3_B/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, high-temperature operation, and automotive qualification.
The 3KASMCxxA family is engineered for high-energy transient suppression in harsh environments, targeting automotive powertrain and ADAS systems where 185 °C junction stability and 3000 W surge immunity are mandatory.
FAQ
What is the clamping voltage of the 3KASMC11AHE3_B/H under full-rated surge conditions?
The 3KASMC11AHE3_B/H exhibits a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 3000 W peak pulse power with a 10/1000 μs waveform. This value is measured at the specified peak pulse current (IPPM = 165 A) and ensures downstream components see no more than 18.2 V during worst-case transients. The 3KASMC11AHE3_B/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC11AHE3_B/H suitable for automotive applications?
Yes, the 3KASMC11AHE3_B/H is AEC-Q101 qualified and manufactured with HE3 suffix indicating RoHS compliance and automotive-grade screening. Its 185 °C maximum junction temperature, MSL Level 1 rating, and passivated anisotropic rectifier technology make it suitable for under-hood and body-control module applications. The 3KASMC11AHE3_B/H is explicitly listed in Vishay's automotive ordering matrix.
What is the polarity configuration of the 3KASMC11AHE3_B/H?
The 3KASMC11AHE3_B/H is a unidirectional TVS diode, meaning it conducts only during positive voltage transients relative to its cathode terminal. Polarity is marked by a visible cathode band on the SMC package body. The 3KASMC11AHE3_B/H must be oriented with the cathode toward the protected line and anode toward ground to function correctly.
How does the thermal performance of the 3KASMC11AHE3_B/H compare to smaller packages like SMB?
The 3KASMC11AHE3_B/H in SMC (DO-214AB) package offers lower thermal resistance than SMB variants - RθJL = 18.3 °C/W versus ~25–30 °C/W for SMB - enabling higher sustained power handling. Its larger copper area improves heat spreading, making the 3KASMC11AHE3_B/H preferable for repeated surge events in thermally constrained layouts where the 3KASMC11AHE3_B/H's 3000 W rating must be fully utilized.
What is the reverse leakage current specification for the 3KASMC11AHE3_B/H at rated VWM?
At 25 °C and rated stand-off voltage (VWM = 11 V), the 3KASMC11AHE3_B/H has a maximum reverse leakage current (IR) of 5.0 μA. At elevated temperature (TJ = 150 °C), leakage increases to a maximum of 50 μA - a controlled, predictable rise that maintains signal integrity in high-temperature automotive applications. This parameter is verified per the 3KASMC11AHE3_B/H datasheet test conditions.
3KASMC11AHE3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 165A
- 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)
3KASMC11AHE3_B/H FAQ
1.How can I place an order for 3KASMC11AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC11AHE3_B/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 3KASMC11AHE3_B/H reliable?
The price and inventory of 3KASMC11AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC11AHE3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC11AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC11AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC11AHE3_B/H?
3KASMC11AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC11AHE3_B/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 3KASMC11AHE3_B/H?
For technical support, including 3KASMC11AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC11AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC11AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC11AHE3_B/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 3KASMC11AHE3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC11AHE3_B/H?
All 3KASMC11AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC11AHE3_B/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 3KASMC11AHE3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC11AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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