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Vishay General Semiconductor - Diodes Division 3KASMC17HE3/57T
- Part No.:
- 3KASMC17HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17HE3/57T.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,100
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Product details
Overview
3KASMC17HE3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR), 3000 W peak pulse power (10/1000 µs), 109 A peak pulse current (IPPM), and 27.6 V clamping voltage (VC) - designed for automotive-grade overvoltage protection of power rails and signal lines in engine control units and ADAS sensor interfaces.
For engineers reviewing the 3KASMC17HE3/57T datasheet, 3KASMC17HE3/57T pinout, 3KASMC17HE3/57T application, or 3KASMC17HE3/57T equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature limit (TJ max = 185 °C), and real-world clamping performance under surge conditions - critical for high-reliability automotive and industrial designs.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping behavior across -65 °C to +185 °C operating range, with low incremental surge resistance enabling consistent voltage limiting during repetitive transients. Its unidirectional polarity and 1.0 mA test current ensure precise VBR definition aligned with ANSI/IEEE C62.35 standards.
The device is optimized for fast response (<1 ns) and low capacitance (typ. <100 pF at 0 V, <50 pF at VWM), making it suitable for protecting high-speed signal paths without signal integrity degradation. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming robustness for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1.0 mA - Voltage at which device enters avalanche conduction; tight tolerance ensures predictable turn-on. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 109 A - Peak voltage seen by protected circuit during 3000 W transient; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 3000 W (10/1000 µs waveform) - Surge energy handling capacity; supports ISO 7637-2 Pulse 1/2a/5a compliance testing. |
| TJ max | +185 °C - Enables operation in under-hood automotive environments without derating up to 150 °C ambient. |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient on standard PCB pad layout; informs heatsinking requirements. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional TVS configuration | Connected to ground or low-impedance return path; completes clamping loop during positive transients. |
| Cathode | High-side connection, marked by color band | Connected to protected line (e.g., 12 V rail or CAN bus); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and leakage over lifetime and temperature. |
| High-temperature capability | TJ max = 185 °C enables use in engine compartment modules without thermal derating penalties. |
| Fast response time | <1 ns turn-on allows suppression of ESD and switching transients before sensitive ICs are damaged. |
| Low incremental surge resistance | Minimizes voltage overshoot during high-current surges, improving clamping accuracy at IPPM. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced failure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control units (ECUs) against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes above 27.6 V while diverting up to 109 A surge current to ground. Use Value: Prevents latch-up or permanent damage to microcontrollers and power management ICs exposed to >100 V transients. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors from cable discharge events. IC Role / Device Role / Timing Role: Fast-clamping TVS absorbs sub-microsecond ESD pulses without affecting loop accuracy or bandwidth. Use Value: Maintains signal integrity and eliminates field failures caused by induced surges on long I/O cables. |
| Automotive ADAS Camera Power Input | Telecom DC Power Feeds |
Use Scenario: Securing 5 V or 12 V input to forward-facing camera modules against ignition noise and battery reversal transients. IC Role / Device Role / Timing Role: Standoff-rated TVS blocks reverse polarity and clamps positive surges within 27.6 V, preserving image sensor functionality. Use Value: Ensures uninterrupted video capture during vehicle start-stop cycles and electromagnetic interference events. |
Use Scenario: Protecting PoE-powered telecom equipment (e.g., remote radio units) from lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: High-power TVS absorbs multi-kW transients on primary DC input, acting as first-line defense before secondary regulators. Use Value: Reduces need for cascaded protection stages and extends mean time between failures in outdoor base station deployments. |
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 | Lower PPPM (400 W), higher RθJA (100 °C/W), same DO-214AC (SMA) package but smaller footprint and lower surge rating. | Not qualified to AEC-Q101; unsuitable for automotive under-hood use; limited to consumer/industrial board-level protection. | Select only for cost-sensitive, non-automotive applications where 109 A surge current and 185 °C operation are not required. |
| SMCJ17A | Same DO-214AB (SMC) package, identical VWM/VBR/VC ratings, but rated for 1500 W PPPM (half the 3KASMC17HE3/57T rating). | Lacks AEC-Q101 qualification and TJ max = 175 °C limit; insufficient for full ISO 7637-2 Pulse 5a compliance in harsh environments. | Acceptable for less demanding automotive subsystems (e.g., infotainment) but not for safety-critical power domains requiring 3000 W headroom. |
Compared with SMAJ17A and SMCJ17A, the 3KASMC17HE3/57T delivers double the surge power rating, 10 °C higher junction temperature limit, and full AEC-Q101 validation - making it the only option among the three qualified for front-end power protection in ASIL-B automotive systems.
Availability
3KASMC17HE3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom DC power feed protection requiring stable component supply, traceable sourcing, and long-term lifecycle support.
Supply support for 3KASMC17HE3/57T 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for AEC-Q101-compliant, high-temperature-stable transient suppression in next-generation automotive electronics and mission-critical industrial controls.
FAQ
What is the clamping voltage of the 3KASMC17HE3/57T at its rated peak pulse current?
The 3KASMC17HE3/57T has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 109 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits will not experience voltages exceeding 27.6 V during standardized surge events - a key parameter for ensuring compatibility with 3.3 V, 5 V, and 12 V ICs in automotive and industrial systems. The 3KASMC17HE3/57T maintains this clamping performance across its full operating temperature range.
Is the 3KASMC17HE3/57T qualified for automotive applications?
Yes, the 3KASMC17HE3/57T is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). Its 185 °C maximum junction temperature and MSL Level 1 rating further validate its suitability for under-hood automotive modules such as engine control units, body controllers, and ADAS domain controllers. The 3KASMC17HE3/57T is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What package type does the 3KASMC17HE3/57T use, and what are its key mechanical features?
The 3KASMC17HE3/57T uses the DO-214AB (SMC) surface-mount package, measuring 7.11 mm × 6.22 mm × 2.62 mm (L × W × H) with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. It features UL 94 V-0 flammability-rated molding compound and a cathode identification band. The 3KASMC17HE3/57T's pad layout recommendation ensures optimal thermal dissipation and mechanical reliability during reflow assembly.
How does the 3KASMC17HE3/57T compare to standard SMAJ or SMCJ series TVS diodes?
The 3KASMC17HE3/57T offers 3000 W peak pulse power - double that of SMCJ17A (1500 W) and 7.5× higher than SMAJ17A (400 W) - along with AEC-Q101 qualification and 185 °C junction rating, whereas SMAJ17A lacks automotive qualification and SMCJ17A is rated only to 175 °C. The 3KASMC17HE3/57T also features lower incremental surge resistance and tighter VBR tolerance, delivering superior clamping consistency. These distinctions make the 3KASMC17HE3/57T uniquely suited for high-stress automotive power rail protection.
What is the maximum reverse leakage current of the 3KASMC17HE3/57T at its stand-off voltage?
The 3KASMC17HE3/57T exhibits a maximum reverse leakage current (IR) of 1.0 µA at its 17 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperature (TJ = 150 °C), leakage remains ≤10 µA - a critical specification for low-power always-on circuits where quiescent current must be minimized. This low leakage ensures minimal impact on system standby power consumption while maintaining robust surge response. The 3KASMC17HE3/57T's leakage performance is verified per the Vishay 89962 datasheet.
3KASMC17HE3/57T 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 98.4A
- 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)
3KASMC17HE3/57T FAQ
1.How can I place an order for 3KASMC17HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17HE3/57T 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 3KASMC17HE3/57T reliable?
The price and inventory of 3KASMC17HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC17HE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC17HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17HE3/57T?
3KASMC17HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17HE3/57T 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 3KASMC17HE3/57T?
For technical support, including 3KASMC17HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17HE3/57T requirements.
6.How does Aetrix verify that 3KASMC17HE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC17HE3/57T 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 3KASMC17HE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC17HE3/57T?
All 3KASMC17HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17HE3/57T, 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 3KASMC17HE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC17HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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