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Vishay General Semiconductor - Diodes Division 3KASMC17AHE3_B/H
- Part No.:
- 3KASMC17AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17AHE3_B/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,362
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Product details
Overview
3KASMC17AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMC (DO-214AB) package, rated for 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown (VBR at 1 mA), 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC17AHE3_B/H datasheet, 3KASMC17AHE3_B/H pinout, 3KASMC17AHE3_B/H application, or 3KASMC17AHE3_B/H equivalent, key selection criteria include clamping voltage (27.6 V at 109 A), unidirectional polarity, AEC-Q101 qualification, thermal resistance (RθJA = 77.5 °C/W), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress, with junction temperature capability up to 185 °C - enabling operation in under-hood automotive environments. Its low incremental surge resistance and fast response time ensure effective suppression of transients from inductive load switching.
The device is characterized for 10/1000 μs waveform testing per ANSI/IEEE C62.35, with clamping voltage specified at IPPM = 109 A and thermal derating defined per Fig. 2. It meets MSL Level 1 (260 °C peak reflow) and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/typ/max) | 18.9 / 19.9 / 20.9 V at 1 mA - precise breakdown threshold for reliable triggering |
| VC @ IPPM | 27.6 V at 109 A - clamping voltage limiting downstream component stress during surge |
| PPPM | 3000 W (10/1000 μs) - high-energy transient absorption capacity for industrial/automotive surges |
| TJ max. | 185 °C - enables use in high-temperature engine control units and powertrain modules |
| Polarity | Unidirectional - protects against positive-going transients only; cathode marked by band |
| RθJA | 77.5 °C/W - defines thermal performance on standard PCB pad layout without heatsink |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or low-side reference in unidirectional clamp configuration |
| Cathode | Current exit terminal during forward conduction; clamping node | Connected to protected line (e.g., sensor supply or gate drive); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term reliability under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak, no dry-pack required |
| Low clamping ratio (VC/VBR) | ~1.38 - tight voltage margin between breakdown and clamping ensures minimal overvoltage exposure |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under high-temperature/humidity bias, critical for safety-critical systems |
Applications
| Automotive Powertrain Sensors | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting crankshaft/camshaft position sensor signal lines from load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input to clamp transients below IC absolute maximum ratings. Use Value: Prevents false triggering or latch-up in Hall-effect sensors by limiting voltage excursions to ≤27.6 V during 109 A surges. | Use Scenario: Safeguarding IGBT gate drivers from Miller-induced voltage spikes during high-dI/dt switching in variable-frequency drives. IC Role / Device Role / Timing Role: Clamping diode connected between gate and source to suppress overshoot exceeding ±20 V. Use Value: Maintains gate oxide integrity with 185 °C junction rating, supporting operation near heatsinks in enclosed enclosures. |
| Telecom DC Power Input | Consumer Appliance Control Board |
Use Scenario: Secondary-side surge protection on +48 V telecom power inputs subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing energy upstream of DC-DC converters and PMICs. Use Value: Delivers 3000 W pulse handling with 27.6 V clamping to prevent converter latch-up during 10/1000 μs transients. | Use Scenario: Overvoltage protection for microcontroller I/O pins connected to push-button interfaces and relay feedback circuits in washing machines. IC Role / Device Role / Timing Role: Low-leakage (1 μA at 17 V) unidirectional suppressor placed at MCU pin to limit ESD and inductive kickback. Use Value: Ensures system-level ESD immunity (IEC 61000-4-2) while avoiding signal distortion due to sub-μA reverse leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17AHE3_A/H | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA) | Not suitable for 3000 W surge events; limited to lower-energy transients in space-constrained consumer designs | Select when board area is critical and surge energy is ≤600 W (e.g., USB port protection) |
| SMCJ17AHE3_A/H | Same SMC package and 3000 W rating, but VBR min = 18.2 V (vs. 18.9 V), VC = 27.7 V - nearly identical performance | Functionally interchangeable in AEC-Q101 automotive designs requiring same thermal and mechanical footprint | Valid drop-in alternative where tighter VBR tolerance is not required; verified pin-compatible replacement |
Compared with SMBJ17AHE3_A/H and SMCJ17AHE3_A/H, the 3KASMC17AHE3_B/H offers superior thermal stability at 185 °C and tighter VBR distribution (18.9–20.9 V), making it preferred for high-reliability automotive powertrain and industrial motor control where junction temperature margins and clamping consistency are critical.
Availability
3KASMC17AHE3_B/H is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drives, telecom DC power inputs, and consumer appliance control boards requiring stable component supply with AEC-Q101 qualification and high-temperature reliability.
Supply support for 3KASMC17AHE3_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 under-hood electronics, industrial automation, and infrastructure equipment where 185 °C operation and 3000 W surge capability are mandatory.
FAQ
What is the clamping voltage of the 3KASMC17AHE3_B/H and how is it measured?
The 3KASMC17AHE3_B/H has a maximum clamping voltage (VC) of 27.6 V at 109 A peak pulse current, tested with a 10/1000 μs waveform per ANSI/IEEE C62.35. This value is measured across the device terminals during surge conditions and represents the upper voltage limit imposed on protected circuitry. The 3KASMC17AHE3_B/H maintains this clamping performance across its full operating temperature range up to 185 °C.
Is the 3KASMC17AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC17AHE3_B/H is AEC-Q101 qualified and designated for automotive use with the HE3 suffix. It undergoes stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The 3KASMC17AHE3_B/H is specifically intended for powertrain, body control, and ADAS subsystems where 185 °C junction capability and robust surge immunity are required.
What does the "B/H" suffix mean in 3KASMC17AHE3_B/H?
The "B/H" suffix in 3KASMC17AHE3_B/H indicates revision level "B" and packaging in 7-inch diameter plastic tape and reel (package code H) with 850 units per reel. This ordering code also confirms RoHS compliance and AEC-Q101 qualification per Vishay's documentation. The 3KASMC17AHE3_B/H is distinct from HM3 variants, which add halogen-free material compliance.
How does the thermal resistance of the 3KASMC17AHE3_B/H affect PCB layout?
The 3KASMC17AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. To maintain safe junction temperatures under sustained power dissipation, designers must follow the specified SMC (DO-214AB) mounting pad dimensions and avoid excessive copper isolation. The 3KASMC17AHE3_B/H benefits from thermal relief to adjacent ground planes but does not require external heatsinking for transient-only operation.
Can the 3KASMC17AHE3_B/H be used in bidirectional protection circuits?
No, the 3KASMC17AHE3_B/H is unidirectional only, as confirmed in the Vishay datasheet features section and electrical characteristics table. It conducts and clamps only for positive transients relative to cathode. For bidirectional protection, a separate device such as the 3KASMC17CAHE3_B/H (center-tapped or complementary pair) would be required - the 3KASMC17AHE3_B/H must not be substituted in AC-coupled or symmetrical surge environments without additional circuitry.
3KASMC17AHE3_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):
- 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/H FAQ
1.How can I place an order for 3KASMC17AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17AHE3_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 3KASMC17AHE3_B/H reliable?
The price and inventory of 3KASMC17AHE3_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 3KASMC17AHE3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC17AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17AHE3_B/H?
3KASMC17AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17AHE3_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 3KASMC17AHE3_B/H?
For technical support, including 3KASMC17AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC17AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC17AHE3_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 3KASMC17AHE3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC17AHE3_B/H?
All 3KASMC17AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17AHE3_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 3KASMC17AHE3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC17AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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