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Vishay General Semiconductor - Diodes Division 3KASMC17AHM3_B/H
- Part No.:
- 3KASMC17AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17AHM3_B/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,251
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Product details
Overview
3KASMC17AHM3_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 - deployed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC17AHM3_B/H datasheet, 3KASMC17AHM3_B/H pinout, 3KASMC17AHM3_B/H application, or 3KASMC17AHM3_B/H equivalent, key selection criteria include clamping voltage (27.6 V at IPPM), AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJL = 18.3 °C/W), and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress up to TJ = 185 °C, with low incremental surge resistance and fast response time suitable for protecting sensitive ICs against inductive switching transients. Its 10/1000 μs waveform rating reflects standardized IEC 61000-4-5 surge immunity testing conditions.
The device operates exclusively in unidirectional mode, with forward voltage limited to 3.5 V at 100 A and reverse leakage ≤1.0 μA at VWM (17 V) and ≤10 μA at TJ = 150 °C - enabling reliable operation in high-temperature automotive engine control units and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V automotive systems. |
| VBR (min/typ/max) | 18.9 / 19.9 / 20.9 V at 1 mA - precise breakdown threshold ensures predictable turn-on during transient events. |
| VC at IPPM | 27.6 V - clamping voltage under 3000 W surge; limits downstream voltage stress on protected MOSFETs or microcontrollers. |
| PPPM | 3000 W - peak pulse power handling per 10/1000 μs waveform; meets ISO 7637-2 Pulse 5a requirements for automotive load dump. |
| TJ max. | +185 °C - extended junction temperature rating supports under-hood placement without derating penalties. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 77.5 °C/W RθJA and 18.3 °C/W RθJL for efficient PCB heat dissipation. |
| AEC-Q101 | Qualified - certified for automotive electronic modules requiring zero-failure reliability under thermal cycling and mechanical shock. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference; enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit terminal during forward conduction; clamping node | Connected to protected line (e.g., sensor supply or gate drive); absorbs transient energy into ground path. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR drift < ±5 % over 1000 hrs at TJ = 150 °C. |
| High-reliability packaging | MSL Level 1 (260 °C reflow peak), JESD201 Class 2 whisker resistance, halogen-free and RoHS-compliant per Vishay Doc. 99912. |
| Automotive qualification | AEC-Q101 qualified variant (HM3 suffix) validated for temperature cycling, HAST, and mechanical shock per automotive stress test standards. |
| Low clamping ratio | VC/VBR ≈ 1.38 - tight ratio minimizes overvoltage overshoot during fast transients, reducing risk of logic upset in MCU interfaces. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and injector driver outputs from load dump and inductive kickback in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and ground, triggered within nanoseconds of transient onset. Use Value: Limits voltage excursion to ≤27.6 V during 3000 W surges, preventing latch-up or gate oxide rupture in N-channel power MOSFETs. |
Use Scenario: Shielding IGBT gate drivers from Miller-induced spikes and cross-talk in variable-frequency AC drives. IC Role / Device Role / Timing Role: Fast-response transient suppressor mounted directly at gate-source terminals to absorb sub-100 ns spikes. Use Value: Clamps gate-source voltage to safe levels (<30 V) while maintaining <1.0 μA leakage at 17 V, avoiding false turn-on. |
| Automotive Sensor Signal Line Protection | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding analog output lines (e.g., pressure, temperature sensors) connected to vehicle body control modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on signal path, referenced to chassis ground. Use Value: Maintains signal integrity with <10 pF junction capacitance at zero bias, while surviving repeated 10/1000 μs surges per ISO 16750-2. |
Use Scenario: Front-end protection for 24 V telecom DC-DC converters exposed to lightning-induced surges on input bus. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of input filter and controller IC. Use Value: Handles 43.2 A peak surge current (IPPM) without degradation, supporting EN 61000-4-5 Level 4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17AHE3_A/H | Same VWM (17 V), lower PPPM (400 W), SMC package, AEC-Q101 qualified (HE3), not halogen-free | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select when cost sensitivity outweighs surge robustness and halogen-free requirement |
| SMCJ17A | Same VWM (17 V), identical PPPM (3000 W), SMC package, no AEC-Q101 or halogen-free certification | Requires external qualification for automotive use; lacks traceability for Tier 1 OEM BOMs | Select for industrial applications where AEC-Q101 and material compliance are non-mandatory |
Compared with SMAJ17AHE3_A/H and SMCJ17A, the 3KASMC17AHM3_B/H uniquely combines 3000 W surge capability, AEC-Q101 qualification, halogen-free construction, and 185 °C TJ rating - making it the only option qualified for under-hood automotive deployment without design revalidation.
Availability
3KASMC17AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drive gate protection, sensor interface circuits, and telecom power supply input stages requiring stable component supply across long production lifecycles.
Supply support for 3KASMC17AHM3_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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive subsystems, emphasizing thermal stability, surge repeatability, and material compliance.
FAQ
What is the clamping voltage of the 3KASMC17AHM3_B/H under maximum surge conditions?
The 3KASMC17AHM3_B/H exhibits a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured at the specified test condition and ensures downstream components remain within safe operating voltage limits during transient events such as load dump or inductive switching.
Is the 3KASMC17AHM3_B/H qualified for automotive applications?
Yes, the 3KASMC17AHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction. It is explicitly designed for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal cycling and mechanical stress is mandatory.
What does the "HM3" suffix signify in 3KASMC17AHM3_B/H?
The "HM3" suffix in 3KASMC17AHM3_B/H denotes halogen-free, RoHS-compliant packaging with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It distinguishes this variant from HE3 (RoHS-compliant and AEC-Q101 qualified but not halogen-free) and standard commercial versions.
What is the thermal resistance from junction to leads for the 3KASMC17AHM3_B/H?
The 3KASMC17AHM3_B/H has a typical thermal resistance from junction to leads (RθJL) of 18.3 °C/W, measured under standard mounting conditions. This low value supports effective heat transfer to PCB copper pours or heatsinks, critical for sustaining repeated surge events in high-temperature environments.
Does the 3KASMC17AHM3_B/H support bidirectional transient suppression?
No, the 3KASMC17AHM3_B/H is a unidirectional TVS diode, as confirmed in the Vishay datasheet. It provides clamping only in reverse-bias mode and must be oriented with the cathode toward the protected line. For bidirectional protection, a separate symmetric device or dual-diode configuration is required.
3KASMC17AHM3_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)
3KASMC17AHM3_B/H FAQ
1.How can I place an order for 3KASMC17AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17AHM3_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 3KASMC17AHM3_B/H reliable?
The price and inventory of 3KASMC17AHM3_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 3KASMC17AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC17AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17AHM3_B/H?
3KASMC17AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17AHM3_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 3KASMC17AHM3_B/H?
For technical support, including 3KASMC17AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17AHM3_B/H requirements.
6.How does Aetrix verify that 3KASMC17AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC17AHM3_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 3KASMC17AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC17AHM3_B/H?
All 3KASMC17AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17AHM3_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 3KASMC17AHM3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC17AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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