My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 3KASMC17AHM3_A/I
- Part No.:
- 3KASMC17AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC17AHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,459
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
3KASMC17AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 17 V stand-off voltage, 18.9–20.9 V breakdown at 1 mA, 3000 W peak pulse power (10/1000 μs), 109 A peak surge current, and 27.6 V clamping voltage at IPPM - deployed for automotive power rail and sensor line protection.
For engineers reviewing the 3KASMC17AHM3_A/I datasheet, 3KASMC17AHM3_A/I pinout, 3KASMC17AHM3_A/I application, or 3KASMC17AHM3_A/I equivalent, key selection criteria include AEC-Q101 qualification, TJ = 185 °C operation, MSL Level 1 moisture sensitivity, uni-directional polarity, and DO-214AB thermal performance with RθJA = 77.5 °C/W.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its junction passivation enables reliable operation up to 185 °C junction temperature and supports automotive-grade reliability under repetitive transient stress.
Designed for clamping inductive-switching transients on DC power lines and signal paths, it delivers fast response time and excellent clamping ratio (VC/VBR ≈ 1.37). The device meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements in its molded DO-214AB package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - ensures precise breakdown threshold for predictable clamping onset |
| PPPM | 3000 W (10/1000 μs) - handles high-energy transients common in automotive load-dump and ISO 7637-2 pulses |
| VC @ IPPM | 27.6 V - clamping voltage at 109 A peak current, limiting downstream voltage stress |
| TJ max. | 185 °C - enables use in under-hood automotive environments without derating penalties |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-current surge events without bond-wire failure |
| RθJA | 77.5 °C/W - defines thermal rise above ambient under natural convection, critical for PCB layout design |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, cathode indicated by color band. Matte tin-plated leads, RoHS-compliant, MSL Level 1, LF peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; connected to protected circuit ground or low-side reference | Provides low VF path (3.5 V @ 100 A) for surge current return during clamping |
| Cathode | Current exit during reverse-biased clamping; connected to protected line (e.g., 12 V rail or sensor output) | Defines clamping node - voltage at this terminal is limited to ≤27.6 V during 109 A transient |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Junction passivation | Enables stable leakage performance (<1 μA @ VWM) and long-term reliability at TJ = 150 °C |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or switching noise) |
| UL 94 V-0 molding compound | Meets flame-retardancy requirement for safety-critical automotive and industrial enclosures |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between VCC and GND, activated within nanoseconds of overvoltage event. Use Value: Limits voltage to ≤27.6 V during 109 A surge, preventing damage to LDOs and MCU internal circuitry rated for 30 V absolute max. |
Use Scenario: Safeguarding analog sensor outputs (e.g., oxygen or pressure sensors) from inductive kickback in engine bay wiring harnesses. IC Role / Device Role / Timing Role: Line-side TVS shunt device mounted at connector interface, clamping reverse transients induced by relay/coil switching. Use Value: Maintains signal integrity by suppressing >100 V spikes to <28 V while adding only 1.5 pF junction capacitance at zero bias. |
| Industrial Motor Drive DC Bus | Telecom Power Supply Input Stage |
Use Scenario: Suppressing commutation spikes on 24 V DC bus feeding brushed DC motors in factory automation systems. IC Role / Device Role / Timing Role: Bulk transient suppressor across bus rails, absorbing energy from motor back-EMF during PWM switching. Use Value: Handles 3000 W peak power without degradation, enabling robust operation at 85 °C ambient with minimal thermal derating. |
Use Scenario: Front-end protection for AC/DC power supplies in telecom base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side 48 V output, coordinated with upstream MOVs and fuses. Use Value: Provides precise 17 V stand-off with tight VBR tolerance (±5.3%), ensuring no false triggering during normal 48 V ±10% regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM (400 W); higher RθJA (110 °C/W); VBR = 18.9–20.9 V same | Limited to lower-energy transients; unsuitable for automotive load-dump; acceptable for consumer-grade I/O protection | Select when cost or board space is constrained and surge energy remains below 400 W |
| 1.5KE18A (ON Semiconductor) | Through-hole DO-201AE package; same VWM/VBR; PPPM = 1500 W; TJ max = 175 °C; not AEC-Q101 qualified | Requires wave soldering; lacks automotive qualification; lower thermal capability limits high-temp deployment | Choose for legacy through-hole designs where rework flexibility outweighs AEC compliance needs |
Compared with SMAJ17A-E3/57T and 1.5KE18A, the 3KASMC17AHM3_A/I delivers 7.5× higher peak power handling, 185 °C junction rating for under-hood use, and AEC-Q101 validation - making it the only option qualified for modern automotive power rail protection without layout or qualification compromise.
Availability
3KASMC17AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor control, telecom power supply input stages, and sensor interface protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for 3KASMC17AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-temperature performance.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, 185 °C operation, and robust 3000 W transient suppression.
FAQ
What is the clamping voltage of the 3KASMC17AHM3_A/I at its rated peak pulse current?
The 3KASMC17AHM3_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 ensures downstream ICs see limited overvoltage during high-energy transients. The 3KASMC17AHM3_A/I maintains this clamping performance across its full operating temperature range up to TJ = 185 °C, verified per AEC-Q101 test conditions.
Is the 3KASMC17AHM3_A/I qualified for automotive applications?
Yes, the 3KASMC17AHM3_A/I is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It meets all required stress tests - including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - and operates reliably up to TJ = 185 °C. The 3KASMC17AHM3_A/I carries the HM3 suffix confirming RoHS compliance and AEC-Q101 qualification per Vishay documentation.
What does the "_A/I" suffix mean in 3KASMC17AHM3_A/I?
The "_A/I" suffix in 3KASMC17AHM3_A/I indicates the packaging configuration: "I" denotes 13-inch diameter plastic tape and reel with 3500 units per reel, while "A" identifies the revision level of the base HM3 package. This ordering code aligns with Vishay's standard nomenclature shown in Document Number 89962, and the 3KASMC17AHM3_A/I is fully compatible with standard SMC pick-and-place equipment.
How does the thermal resistance of the 3KASMC17AHM3_A/I affect PCB layout?
The 3KASMC17AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W under standard JEDEC test conditions. To maintain TJ ≤ 185 °C at full 3000 W pulse loading, PCB copper area and via count must be optimized - minimum recommended pad layout is specified in the datasheet. The 3KASMC17AHM3_A/I requires adequate thermal relief on both terminals to avoid localized overheating during repeated surge events.
Can the 3KASMC17AHM3_A/I replace older SMC-package TVS diodes like P6SMB17A?
The 3KASMC17AHM3_A/I offers superior performance versus P6SMB17A: higher PPPM (3000 W vs. 600 W), higher TJ rating (185 °C vs. 150 °C), AEC-Q101 qualification, and tighter VBR tolerance. While both use DO-214AB (SMC) footprint, the 3KASMC17AHM3_A/I is not a direct drop-in replacement due to differences in surge current derating curves and thermal impedance. System-level validation is required before substituting the 3KASMC17AHM3_A/I for P6SMB17A in existing designs.
3KASMC17AHM3_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)
3KASMC17AHM3_A/I FAQ
1.How can I place an order for 3KASMC17AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC17AHM3_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 3KASMC17AHM3_A/I reliable?
The price and inventory of 3KASMC17AHM3_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 3KASMC17AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC17AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC17AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC17AHM3_A/I?
3KASMC17AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC17AHM3_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 3KASMC17AHM3_A/I?
For technical support, including 3KASMC17AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC17AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC17AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC17AHM3_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 3KASMC17AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC17AHM3_A/I?
All 3KASMC17AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC17AHM3_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 3KASMC17AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC17AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC17AHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
