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Vishay General Semiconductor - Diodes Division 3KASMC43AHM3_A/I
- Part No.:
- 3KASMC43AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHM3_A/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,797
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Product details
Overview
3KASMC43AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 69.4 V under 43.2 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC43AHM3_A/I datasheet, 3KASMC43AHM3_A/I pinout, 3KASMC43AHM3_A/I application, or 3KASMC43AHM3_A/I equivalent, this page provides verified electrical parameters, DO-214AB package details, AEC-Q101 qualification status, thermal resistance data, and direct alternatives for automotive-grade overvoltage protection design.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 43 V stand-off voltage target DC bus lines where reverse conduction must be blocked while clamping positive-going surges.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits 77.5 °C/W junction-to-ambient thermal resistance on standard PCB pad layout - critical for sustained power dissipation in engine control units and motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC rail. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown threshold range ensures reliable turn-on margin above VWM. |
| PPPM | 3000 W (10/1000 μs) - Sustains high-energy lightning or load-dump surges without failure in automotive 12 V/24 V systems. |
| VC @ IPPM | 69.4 V at 43.2 A - Clamping voltage defines maximum stress imposed on downstream components during surge events. |
| TJ max | 185 °C - Enables operation in under-hood environments and industrial enclosures without derating penalties. |
| RθJA | 77.5 °C/W - Thermal resistance measured on minimum recommended pad layout; informs heatsinking requirements. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules requiring zero-defect reliability and extended temperature cycling. |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side reference; enables clamping when cathode voltage exceeds VBR. |
| Cathode | Current exit point during clamping | Connected to protected line (e.g., battery rail); color band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn cracking or delamination. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving clamping precision. |
| Uni-directional polarity | Blocks reverse leakage below VWM while clamping only positive surges - ideal for DC supply rail protection. |
| RoHS-compliant & whisker-tested | HM3 suffix confirms compliance with JESD 201 Class 2 whisker resistance, ensuring solder joint integrity in vibration-prone applications. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting microcontroller power inputs and gate drivers from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and local LDO input. Use Value: Withstands 3000 W surges and operates up to 185 °C, eliminating need for external heatsinking in compact ECU housings. |
Use Scenario: Safeguarding IGBT gate drivers and current-sense amplifiers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Fast-response clamping diode across DC link capacitor terminals. Use Value: 69.4 V clamping voltage limits stress on 75 V-rated gate drivers, preventing latch-up or oxide breakdown. |
| Telecom Power Supply Input | Automotive ADAS Camera Module |
Use Scenario: Suppressing lightning-induced surges on -48 V telecom rectifier outputs feeding backplane distribution. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output before DC/DC converters. Use Value: 43 V stand-off voltage matches nominal -48 V system derating, while 3000 W rating handles IEC 61000-4-5 Level 4 surges. |
Use Scenario: Shielding image sensor and serializer ICs from ESD and cable discharge events in rear-view camera harnesses. IC Role / Device Role / Timing Role: Line-side TVS on FAKRA connector feedthrough before signal conditioning circuitry. Use Value: AEC-Q101 qualification and 185 °C capability ensure uninterrupted operation in sealed, thermally constrained camera housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM = 400 W; VC = 69.4 V at 5.8 A. | Not suitable for 3000 W load-dump events; limited to low-energy ESD and signal-line protection. | Select only when space constraints prevent DO-214AB use and surge energy is ≤400 W. |
| 1.5KE43A (ON Semiconductor) | Through-hole DO-201 package; PPPM = 1500 W; VC = 69.4 V at 21.6 A; no AEC-Q101 qualification. | Requires wave soldering; lacks automotive qualification and high-temperature capability (TJ max = 175 °C). | Acceptable for industrial non-automotive designs where board-level assembly allows through-hole components. |
Compared with SMAJ43A-E3/57T and 1.5KE43A, the 3KASMC43AHM3_A/I uniquely combines 3000 W surge capacity, AEC-Q101 qualification, 185 °C operation, and surface-mount DO-214AB packaging - making it the only option qualified for under-hood automotive power rail protection without layout or reliability compromise.
Availability
3KASMC43AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power supplies, and ADAS camera modules requiring stable component supply and full AEC-Q101 compliance.
Supply support for 3KASMC43AHM3_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 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 3000 W surge immunity.
FAQ
What is the clamping voltage of the 3KASMC43AHM3_A/I under maximum surge conditions?
The 3KASMC43AHM3_A/I clamps at 69.4 V when subjected to its rated peak pulse current of 43.2 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Electrical Characteristics table of Vishay document 89962. The clamping voltage directly determines the maximum stress applied to protected components during surge events, making it a critical parameter for downstream IC voltage ratings.
Is the 3KASMC43AHM3_A/I qualified for automotive use?
Yes, the 3KASMC43AHM3_A/I is AEC-Q101 qualified, as explicitly stated in the Mechanical Data and Ratings sections of Vishay document 89962. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for automotive powertrain, body control, and ADAS modules where zero-defect reliability is mandatory.
What does the "HM3_A/I" suffix mean in 3KASMC43AHM3_A/I?
The "HM3" denotes RoHS-compliant, AEC-Q101-qualified DO-214AB (SMC) packaging with matte tin plating and JESD 201 Class 2 whisker resistance. "_A" indicates revision level A; "/I" specifies 3500-unit quantity on 13-inch tape-and-reel delivery. This ordering code ensures traceability to Vishay's qualified manufacturing lot and matches the preferred package code listed in the Ordering Information table.
Can the 3KASMC43AHM3_A/I replace the 3KASMC40A in a design?
No - the 3KASMC43AHM3_A/I has a higher stand-off voltage (43 V vs. 40 V) and clamping voltage (69.4 V vs. 64.5 V) than the 3KASMC40A. Substituting it may cause premature clamping in 40 V systems or exceed downstream component voltage ratings. Use only if the protected circuit's maximum operating voltage and surge tolerance align with the 43 V VWM and 69.4 V VC of the 3KASMC43AHM3_A/I.
What is the thermal resistance of the 3KASMC43AHM3_A/I, and how is it measured?
The 3KASMC43AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W, measured on the minimum recommended PCB pad layout per JEDEC standards. This value assumes natural convection cooling with no heatsink and defines the temperature rise above ambient per watt of steady-state power dissipation - essential for verifying safe operation under continuous leakage or repetitive surge conditions.
3KASMC43AHM3_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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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)
3KASMC43AHM3_A/I FAQ
1.How can I place an order for 3KASMC43AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHM3_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 3KASMC43AHM3_A/I reliable?
The price and inventory of 3KASMC43AHM3_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 3KASMC43AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHM3_A/I?
3KASMC43AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHM3_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 3KASMC43AHM3_A/I?
For technical support, including 3KASMC43AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC43AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHM3_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 3KASMC43AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHM3_A/I?
All 3KASMC43AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHM3_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 3KASMC43AHM3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC43AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHM3_A/I Tags
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