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Vishay General Semiconductor - Diodes Division 3KASMC17HE3_A/I
- Part No.:
- 3KASMC17HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17HE3_A/I.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,015
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Product details
Overview
3KASMC17HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 17 V stand-off voltage (VWM), and 27.6 V maximum clamping voltage (VC) at 109 A IPPM. It operates up to TJ = 185 °C and is AEC-Q101 qualified for automotive power line and sensor protection.
For engineers reviewing the 3KASMC17HE3_A/I datasheet, 3KASMC17HE3_A/I pinout, 3KASMC17HE3_A/I application, or 3KASMC17HE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity compatibility with DC-biased lines, thermal resistance (RθJA = 77.5 °C/W), and MSL Level 1 reflow capability at 260 °C peak.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping across -65 °C to +185 °C junction temperature range. Its low incremental surge resistance and fast response time enable effective suppression of inductive switching transients and ESD events on 12 V and 24 V automotive power rails.
The device is optimized for high-reliability applications requiring robust surge immunity without derating penalties above 25 °C ambient - supported by its 185 °C max TJ rating and thermal derating curve validated per Fig. 2 and Fig. 6 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system DC bias margin. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this band at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPPM | 27.6 V - Clamped voltage at 109 A peak pulse current (10/1000 μs); determines worst-case overvoltage seen by protected IC. |
| PPPM | 3000 W - Peak pulse power handling capacity; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max | +185 °C - Enables operation in under-hood automotive environments without thermal shutdown or parameter drift. |
| RθJA | 77.5 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs heatsinking requirements for sustained surge duty. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive-grade discrete semiconductors including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts during overvoltage to clamp to VC while diverting energy to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes surge current loop during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage (<1 μA at VWM) over lifetime and temperature. |
| High-temperature operation | Rated for continuous operation up to TJ = 185 °C - eliminates derating concerns in engine control units and ADAS modules. |
| Clamping efficiency | Low VC/VBR ratio (~1.46) confirms minimal voltage overshoot during 109 A surge, preserving downstream MOSFET gate oxide integrity. |
| Robust surge handling | Withstands 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), supporting load-dump transient resilience. |
| Automotive qualification | AEC-Q101 qualification covers HTGB, HTRB, TCT, and mechanical shock tests - required for Tier-1 production in powertrain and chassis systems. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppresses load dump (ISO 7637-2 Pulse 5a) and jump-start transients on 12 V battery-fed circuits. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp overvoltage before LDO or MCU power supply. Use Value: Limits peak voltage to ≤27.6 V during 109 A surge, preventing damage to 30 V-rated input stages in PMICs and microcontrollers. |
Use Scenario: Protects analog sensor inputs (e.g., MAP, TPS) and CAN transceiver power pins from inductive kickback in engine bay wiring harnesses. IC Role / Device Role / Timing Role: Fast-clamping TVS on VCC line of 5 V sensor interface ICs, triggered within nanoseconds of transient onset. Use Value: Maintains signal integrity by holding rail voltage below 27.6 V during 10/1000 μs transients, avoiding brown-out resets or latch-up. |
| Industrial Motor Drive DC Bus | Telecom Power Supply Input |
Use Scenario: Guards DC bus inputs of BLDC motor controllers against back-EMF spikes during rapid deceleration or fault conditions. IC Role / Device Role / Timing Role: Primary surge limiter on 24–48 V DC bus, positioned upstream of bulk capacitors and gate drivers. Use Value: Absorbs 3000 W pulses without degradation, enabling compliance with IEC 61800-3 EMC requirements for variable frequency drives. |
Use Scenario: Shields AC/DC front-end rectifiers and PFC controllers in telecom power supplies from lightning-induced surges on primary-side inputs. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC output rails (e.g., +12 V, +48 V) feeding baseband processors and RF modules. Use Value: Provides <1 μA leakage at 17 V VWM, minimizing standby power loss while delivering 27.6 V clamping for IEC 61000-4-5 Level 4 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A | Lower PPPM (400 W), higher RθJA (105 °C/W), same DO-214AC (SMA) package but smaller footprint and lower surge capacity. | Not suitable for automotive load dump; limited to low-energy ESD and signal-line protection. | Select only for cost-sensitive consumer electronics where 3000 W surge immunity is unnecessary. |
| SMCJ17A | Same DO-214AB (SMC) package, identical VWM (17 V) and VC (27.6 V), but rated for 1500 W PPPM (half the capacity of 3KASMC17HE3_A/I). | Meets basic ISO 16750-2 requirements but fails full ISO 7637-2 Pulse 5a testing at 12 V systems. | Choose when board space allows SMC package but system surge profile is less severe than automotive load dump. |
Compared with SMAJ17A and SMCJ17A, the 3KASMC17HE3_A/I delivers double the surge power handling and superior thermal robustness (185 °C TJ max vs. 150 °C), making it the only option qualified for under-hood automotive deployment with full load-dump immunity.
Availability
3KASMC17HE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input hardening, and industrial motor drive DC bus surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for 3KASMC17HE3_A/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 reliability, thermal performance, and automotive qualification.
The 3KASMC series is designed specifically for high-energy transient suppression in harsh automotive and industrial environments, targeting applications demanding AEC-Q101 compliance, 185 °C operation, and 3000 W surge immunity.
FAQ
What is the clamping voltage of the 3KASMC17HE3_A/I at its rated peak pulse current?
The 3KASMC17HE3_A/I has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 109 A, measured using a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 27.6 V during surge events. The 3KASMC17HE3_A/I's low VC/VBR ratio reflects its efficient clamping design, critical for protecting 30 V-rated power management ICs.
Is the 3KASMC17HE3_A/I suitable for automotive under-hood applications?
Yes, the 3KASMC17HE3_A/I is explicitly qualified to AEC-Q101 and rated for continuous operation up to TJ = 185 °C, making it suitable for under-hood automotive applications such as engine control units, transmission control modules, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 reflow standards, and its 3000 W surge rating supports ISO 7637-2 Pulse 5a load dump immunity - all confirmed in Vishay document 89962. The 3KASMC17HE3_A/I is engineered for this environment.
What is the polarity configuration of the 3KASMC17HE3_A/I?
The 3KASMC17HE3_A/I is unidirectional only, with cathode denoted by a color band on the DO-214AB (SMC) package body. It functions as a reverse-biased avalanche diode, conducting only when the cathode voltage exceeds the anode by ≥18.9 V (VBR min). This configuration is intended for DC-biased lines like automotive battery rails and avoids leakage issues common with bidirectional variants. The 3KASMC17HE3_A/I does not support AC or bipolar transient suppression.
How does the thermal resistance of the 3KASMC17HE3_A/I affect PCB layout?
The 3KASMC17HE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W on the recommended mounting pad layout. To maintain safe junction temperatures during repeated surges, designers must use minimum pad dimensions per the datasheet (0.126" × 0.185") and avoid excessive copper isolation. Thermal vias and ground-plane coupling significantly reduce RθJA in practice. The 3KASMC17HE3_A/I's RθJL of 18.3 °C/W further emphasizes the importance of low-impedance lead-to-plane connections.
What packaging and reel options are available for the 3KASMC17HE3_A/I?
The 3KASMC17HE3_A/I is supplied in 13" diameter plastic tape and reel format with a base quantity of 3500 units per reel (package code "I"). It uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards, and passes JESD 201 Class 2 whisker testing. The "HM3_A/I" suffix indicates RoHS-compliance and AEC-Q101 qualification. No tray or tube options are specified for this variant - the 3KASMC17HE3_A/I is reel-only.
3KASMC17HE3_A/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:
- 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_A/I FAQ
1.How can I place an order for 3KASMC17HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17HE3_A/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 3KASMC17HE3_A/I reliable?
The price and inventory of 3KASMC17HE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC17HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC17HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17HE3_A/I?
3KASMC17HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17HE3_A/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 3KASMC17HE3_A/I?
For technical support, including 3KASMC17HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC17HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC17HE3_A/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 3KASMC17HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC17HE3_A/I?
All 3KASMC17HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17HE3_A/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 3KASMC17HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC17HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC17HE3_A/I Tags
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