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Vishay General Semiconductor - Diodes Division 3KASMC17AHM3_B/I
- Part No.:
- 3KASMC17AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17AHM3_B/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,542
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Product details
Overview
3KASMC17AHM3_B/I 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), 19.9 V nominal breakdown (VBR), 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 3KASMC17AHM3_B/I datasheet, 3KASMC17AHM3_B/I pinout, 3KASMC17AHM3_B/I application, or 3KASMC17AHM3_B/I equivalent, key selection criteria include clamping voltage (27.6 V at IPPM), low incremental surge resistance, AEC-Q101 qualification, and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress. Its 185 °C TJ rating enables operation in under-hood automotive environments where thermal derating must be minimized.
The device exhibits 27.6 V maximum clamping voltage at 109 A peak pulse current (10/1000 μs), with 0.082 %/°C temperature coefficient of VBR and 1.0 μA max reverse leakage at 17 V - ensuring predictable turn-on behavior across industrial and automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (nom) | 19.9 V at 1.0 mA - precise breakdown threshold enabling accurate overvoltage trip point |
| VC @ IPPM | 27.6 V at 109 A - low clamping voltage limits voltage overshoot during ESD or load dump events |
| PPPM | 3000 W (10/1000 μs) - high-energy surge handling for automotive ISO 7637-2 and IEC 61000-4-5 compliance |
| TJ max | +185 °C - supports placement near high-temperature components without derating penalties |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.11 mm body length and 3.20 mm width |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to protected circuit's ground or low-side reference; defines polarity directionality |
| Cathode | Current exit terminal during clamping; marked with color band | Connected to line being protected (e.g., sensor supply rail); determines clamping polarity |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR and low leakage over 1000+ surge cycles at TJ = 150 °C |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A material declarations for green manufacturing |
| MSL Level 1 (260 °C peak) | Allows standard reflow assembly without pre-baking; compatible with automated SMT lines |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 10605 ESD) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to 40 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before reaching downstream regulators. Use Value: 3000 W PPPM and 27.6 V VC ensure MOSFET gate drivers remain within safe SOA during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding analog outputs of pressure or temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA signal paths to suppress coupling from nearby motor drives. Use Value: 1.0 μA IR at 17 V prevents DC offset errors; 185 °C TJ rating maintains reliability in enclosed enclosures. |
| Consumer Power Adapter Input Stage | Telecom DC Power Interface |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters subject to transient coupling from primary side. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/9 V/15 V output rails to absorb cross-regulator coupling spikes. Use Value: 19.9 V VBR provides margin above 15 V PD profiles while 27.6 V VC avoids brownout during clamping. | Use Scenario: DC feed protection for PoE-powered network switches exposed to lightning-induced surges on 48 V input. IC Role / Device Role / Timing Role: Primary-stage TVS on midspan injector output to limit voltage seen by IEEE 802.3af/at PD interface ICs. Use Value: 3KASMC17AHM3_B/I's 109 A IPPM handles 10/1000 μs surges per IEC 61000-4-5 Level 4 without degradation. |
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/VBR/VC specs but lower PPPM (400 W), smaller SMA package, non-AEC-Q101 | Limited to consumer-grade, non-automotive applications with lower surge energy requirements | Select when cost and board space constrain design and surge threat level is ≤ IEC 61000-4-2 Level 3 |
| TPSMD17A | Higher VBR (18.9–20.9 V), same SMC package, AEC-Q101 qualified, but 2000 W PPPM (vs. 3000 W) | Acceptable for moderate automotive transients but may not survive repeated load dump events | Choose if supply chain prioritization favors TI's distribution network and 3000 W headroom is not required |
Compared with SMAJ17AHE3_A/H and TPSMD17A, the 3KASMC17AHM3_B/I delivers 5× higher peak pulse power in the same SMC footprint and is uniquely qualified for high-reliability automotive use with halogen-free construction - making it optimal for safety-critical power rail protection where surge margin and long-term stability are mandatory.
Availability
3KASMC17AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor modules, consumer power adapter secondary sides, and telecom DC power interfaces requiring stable component supply with full traceability and lifecycle management.
Supply support for 3KASMC17AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade performance.
The 3KASMCxxA family was engineered specifically for high-energy transient suppression in harsh environments - targeting AEC-Q101 compliance, 185 °C operation, and robust PAR® technology for automotive and industrial power systems.
FAQ
What is the clamping voltage of the 3KASMC17AHM3_B/I under a 10/1000 μs surge?
The 3KASMC17AHM3_B/I has a maximum clamping voltage (VC) of 27.6 V at 109 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain below critical voltage thresholds during standardized surge events. The 3KASMC17AHM3_B/I achieves this with low incremental surge resistance, minimizing overshoot beyond VC.
Is the 3KASMC17AHM3_B/I qualified for automotive applications?
Yes, the 3KASMC17AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 88480 datasheet. It meets automotive reliability requirements including high-temperature operation up to 185 °C, MSL Level 1 reflow compatibility, and JESD201 Class 2 whisker resistance - making the 3KASMC17AHM3_B/I suitable for engine control, ADAS, and body electronics.
What does the "HM3" suffix indicate in 3KASMC17AHM3_B/I?
The "HM3" suffix in 3KASMC17AHM3_B/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from HE3 (RoHS-compliant but not halogen-free) and confirms compliance with JEDEC JS709E and IPC-1752A material standards - a requirement for many Tier 1 automotive OEMs. The 3KASMC17AHM3_B/I is supplied in 13" tape-and-reel (3500 pcs).
How does the thermal resistance of the 3KASMC17AHM3_B/I affect PCB layout?
The 3KASMC17AHM3_B/I has a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, meaning effective copper pour on both anode and cathode pads is essential to maintain TJ ≤ 185 °C under sustained surge duty. Layout must follow Vishay's recommended pad dimensions (min. 3.20 mm × 1.52 mm per pad) to avoid thermal runaway - critical for reliable operation of the 3KASMC17AHM3_B/I in high-power automotive transients.
Can the 3KASMC17AHM3_B/I replace older SMAJ17A devices in existing designs?
No direct replacement: the 3KASMC17AHM3_B/I uses the larger SMC (DO-214AB) package versus SMAJ17A's SMA (DO-214AC), requiring PCB footprint change. While electrical specs align closely (VWM = 17 V, VBR ≈ 19.9 V), the 3KASMC17AHM3_B/I offers 3000 W PPPM vs. 400 W for SMAJ17A and adds AEC-Q101/halogen-free compliance - so redesign is needed to leverage the 3KASMC17AHM3_B/I's full capability.
3KASMC17AHM3_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)
3KASMC17AHM3_B/I FAQ
1.How can I place an order for 3KASMC17AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17AHM3_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 3KASMC17AHM3_B/I reliable?
The price and inventory of 3KASMC17AHM3_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 3KASMC17AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC17AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17AHM3_B/I?
3KASMC17AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17AHM3_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 3KASMC17AHM3_B/I?
For technical support, including 3KASMC17AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC17AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC17AHM3_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 3KASMC17AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC17AHM3_B/I?
All 3KASMC17AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17AHM3_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 3KASMC17AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC17AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC17AHM3_B/I Tags
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