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Vishay General Semiconductor - Diodes Division 3KASMC17AHE3_B/I
- Part No.:
- 3KASMC17AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17AHE3_B/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,522
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Product details
Overview
3KASMC17AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection of sensitive electronics. It features a 17 V stand-off voltage (VWM), 19.9 V nominal breakdown voltage (VBR), 3000 W peak pulse power (10/1000 μs), 109 A peak pulse current (IPPM), and 27.6 V clamping voltage (VC) at rated current - deployed in automotive powertrain control units, industrial motor drives, and sensor interface circuits.
For engineers reviewing the 3KASMC17AHE3_B/I datasheet, 3KASMC17AHE3_B/I pinout, 3KASMC17AHE3_B/I application, or 3KASMC17AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction temperature rating, low clamping ratio (VC/VBR ≈ 1.39), and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance under repetitive surge stress and high ambient temperatures. Its junction passivation enables reliable operation up to TJ = 185 °C and meets MSL Level 1 (260 °C peak reflow).
The device operates exclusively in unidirectional mode with cathode-band polarity marking, exhibits 0.082 %/°C temperature coefficient of VBR, and achieves low incremental surge resistance for effective voltage limiting during fast transients such as inductive load switching or ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (nom) | 19.9 V at 1 mA - precise breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 27.6 V at 109 A - clamping voltage limits downstream IC stress during 3000 W surge; clamping ratio = 1.39. |
| PPPM | 3000 W (10/1000 μs) - handles high-energy transients common in automotive and industrial power systems. |
| TJ max | +185 °C - supports under-hood automotive applications and high-temperature industrial environments. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD robustness. |
| RθJA | 77.5 °C/W - thermal resistance informs PCB pad layout design for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side reference node for unidirectional clamping | Connected to protected line; conducts when line voltage exceeds VBR relative to ground/anode. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return; completes clamping current path during surge. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift ≤ ±5 % over 1000 hrs at 150 °C, critical for long-life automotive modules. |
| 10/1000 μs 3000 W pulse rating | Withstands ISO 7637-2 Pulse 1/2a/5a surges without degradation in engine control units. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without delamination or parameter shift. |
| Low clamping ratio (VC/VBR = 1.39) | Minimizes overvoltage exposure to downstream MOSFET gates or MCU I/O pins during transients. |
| Color-band cathode marking | Enables automated optical inspection (AOI) and eliminates polarity misplacement in high-volume SMT lines. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate drivers in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across supply rail or signal line to shunt surge energy to ground. Use Value: Maintains 17 V system integrity while clamping 12 V battery transients up to 3000 W without latch-up or parametric shift. |
Use Scenario: Safeguarding encoder feedback lines and PWM gate drive signals in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response transient suppressor on isolated analog/signal paths subject to inductive kickback. Use Value: Limits induced spikes to ≤27.6 V within nanoseconds, preserving signal fidelity and preventing false triggering of comparators. |
| Automotive Sensor Interface | Telecom DC Power Input |
Use Scenario: Shielding LIN/CAN physical layer receivers and pressure/temperature sensor outputs in ADAS modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on bidirectional data lines referenced to local ground. Use Value: Provides <1 μA leakage at 17 V while delivering sub-1 ns response to ESD and cable discharge events. |
Use Scenario: Front-end protection of 24 V/48 V telecom power supplies against lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Primary surge suppression stage before DC/DC converter input filtering. Use Value: Absorbs 3000 W pulses without thermal runaway, enabling compliance with IEC 61000-4-5 Level 4 (4 kV/2 Ω). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Lower PPPM (400 W), same VWM (17 V), SMC package, non-AEC-Q101 | Rated for commercial/industrial use only; not qualified for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification and surge energy requirements are ≤400 W. |
| SMCJ17AHE3_A/H | Same VWM/VC/PPPM specs, identical AEC-Q101 qualification, but HE3_A/H denotes different tape-and-reel packaging (7″ reel, 850 pcs) | No functional or reliability difference; differs only in logistics configuration and orderable part number | Choose for smaller batch procurement or legacy BOM alignment where 7″ reel format is required. |
Compared with SMAJ17A-E3/57T and SMCJ17AHE3_A/H, the 3KASMC17AHE3_B/I delivers identical surge robustness and automotive qualification but offers optimized logistics via 13″ reel (3500 pcs), reducing handling frequency and improving SMT line uptime in high-volume production.
Availability
3KASMC17AHE3_B/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom DC power input applications requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC17AHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The 3KASMC series was developed specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial systems, emphasizing thermal stability, surge endurance, and SMT manufacturability.
FAQ
What is the clamping voltage of the 3KASMC17AHE3_B/I at its rated peak pulse current?
The 3KASMC17AHE3_B/I has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 109 A, measured under the standard 10/1000 μs waveform. This value ensures downstream components experience limited overvoltage during surge events, and it is verified per ANSI/IEEE C62.35 test conditions in the official Vishay datasheet (Doc. #88480).
Is the 3KASMC17AHE3_B/I qualified for automotive applications?
Yes, the 3KASMC17AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in revision 19-Jan-2024 of datasheet 88480. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making the 3KASMC17AHE3_B/I suitable for under-hood and powertrain applications.
What package type does the 3KASMC17AHE3_B/I use, and what are its mounting requirements?
The 3KASMC17AHE3_B/I uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads. It requires the minimum recommended pad layout per Vishay's mechanical drawing - including 0.126″ (3.20 mm) minimum cathode/anode pad width - and is rated for MSL Level 1 reflow up to 260 °C peak, supporting lead-free soldering without preconditioning.
How does the temperature coefficient of VBR affect the 3KASMC17AHE3_B/I's performance?
The 3KASMC17AHE3_B/I has a typical VBR temperature coefficient (αT) of +0.082 %/°C. This means its breakdown voltage increases linearly with junction temperature - e.g., VBR rises ~1.6 V from 25 °C to 150 °C - ensuring predictable, stable clamping behavior across its full -65 °C to +185 °C operating range without premature conduction or loss of protection margin.
What is the maximum reverse leakage current of the 3KASMC17AHE3_B/I at its stand-off voltage?
At its 17 V stand-off voltage (VWM) and TA = 25 °C, the 3KASMC17AHE3_B/I exhibits a maximum reverse leakage current (IR) of 1.0 μA. At elevated temperature (TJ = 150 °C), leakage remains ≤10 μA - low enough to avoid loading sensitive sensor or communication lines while maintaining robust surge readiness.
3KASMC17AHE3_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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 109A
- 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)
3KASMC17AHE3_B/I FAQ
1.How can I place an order for 3KASMC17AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17AHE3_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 3KASMC17AHE3_B/I reliable?
The price and inventory of 3KASMC17AHE3_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 3KASMC17AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC17AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17AHE3_B/I?
3KASMC17AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17AHE3_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 3KASMC17AHE3_B/I?
For technical support, including 3KASMC17AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC17AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC17AHE3_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 3KASMC17AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC17AHE3_B/I?
All 3KASMC17AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17AHE3_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 3KASMC17AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC17AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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