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Vishay General Semiconductor - Diodes Division 3KASMC43AHM3_A/H
- Part No.:
- 3KASMC43AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHM3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,157
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Product details
Overview
3KASMC43AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode 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 in engine control units and motor drives.
For engineers reviewing the 3KASMC43AHM3_A/H datasheet, 3KASMC43AHM3_A/H pinout, 3KASMC43AHM3_A/H application, or 3KASMC43AHM3_A/H equivalent, key selection criteria include its 43 V stand-off voltage, AEC-Q101 qualification, DO-214AB (SMC) package thermal performance, and verified clamping behavior under repetitive surge stress per JESD22-B102 and J-STD-020 MSL Level 1.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for stable clamping across -65 °C to +185 °C, with low incremental surge resistance and sub-nanosecond response time. Its unidirectional architecture provides forward conduction path during overvoltage events while maintaining 1.0 µA leakage at 43 V stand-off.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), derates linearly above 25 °C ambient per Fig. 2, and achieves 18.3 °C/W junction-to-lead thermal resistance - critical for sustained operation in high-power automotive modules without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 43 V - maximum continuous reverse voltage before clamping initiates; defines operating margin for 36–42 V nominal systems. |
| Breakdown Voltage (VBR) | 47.8–52.8 V at 1 mA - ensures reliable avalanche initiation prior to system damage threshold. |
| Clamping Voltage (VC) | 69.4 V at 43.2 A IPPM - limits transient voltage seen by downstream MOSFET gate or IC supply rail. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 µs) - sustains high-energy surges common in automotive load-dump and ISO 7637-2 tests. |
| Junction Temperature (TJ) | -65 °C to +185 °C - supports under-hood placement in engine control, transmission, and ADAS modules. |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 1.52 mm lead pitch. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: DO-214AB (SMC), molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal during clamping | Connected to protected circuit ground or low-side return path; enables unidirectional surge shunting to GND. |
| Cathode | Reverse-biased terminal during normal operation | Connected to protected line (e.g., 12 V battery rail); avalanche conduction occurs when line voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage over lifetime and temperature. |
| TJ = 185 °C capability | Enables direct mounting on high-temperature PCB zones near power stages without derating penalties. |
| MSL Level 1 rating | Allows standard SMT reflow (peak 260 °C) without moisture-induced cracking or parametric shift. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 16750-2 pulse 5a), improving system immunity. |
| Uni-directional polarity only | Simplifies layout and eliminates need for bidirectional clamping in DC-biased applications like battery input rails. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protects microcontroller I/O and power supply inputs from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamps 12 V rail surges up to ±120 V, limiting voltage to 69.4 V at 43.2 A. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic supplies and CAN transceivers in under-hood environments. |
Use Scenario: Shields gate drivers and bootstrap circuits from inductive kickback during IGBT/MOSFET turn-off in 48 V BLDC inverters. IC Role / Device Role / Timing Role: Fast-response clamping suppresses >100 ns spikes on 40–45 V DC bus before they propagate to sensitive control ICs. Use Value: Eliminates need for additional RC snubbers, reducing BOM count and board space in compact drive modules. |
| Telecom Power Supply Input | Consumer Appliance Main Board |
Use Scenario: Guards AC/DC front-end rectifiers and PFC controllers against lightning-induced surges on 48 V telecom distribution lines. IC Role / Device Role / Timing Role: Absorbs 3000 W pulses per IEC 61000-4-5 Combination Wave test, clamping within 1 ns. Use Value: Meets EN 61000-6-2 immunity requirements without external varistors or gas discharge tubes. |
Use Scenario: Safeguards MCU reset lines and sensor interfaces in washing machine main boards exposed to relay coil transients. IC Role / Device Role / Timing Role: Provides localized clamping at point-of-use for 3.3 V/5 V rails, minimizing trace inductance impact. Use Value: Reduces field failure rate due to ESD and switching noise in cost-sensitive white goods with minimal layout changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 47.8–52.8 V; TJ max = 150 °C | Limited to low-energy consumer electronics; not AEC-Q101 qualified; unsuitable for under-hood use | Select when cost sensitivity outweighs surge energy requirement and automotive qualification is unnecessary. |
| SMCJ43A | Same DO-214AB (SMC) package; identical PPPM (3000 W); same VBR/VC specs; AEC-Q101 qualified | Direct functional match but lacks HM3 suffix - no JESD201 Class 2 whisker resistance guarantee | Choose 3KASMC43AHM3_A/H over SMCJ43A where long-term solder joint reliability under thermal cycling is mission-critical. |
Compared with SMAJ43A and SMCJ43A, the 3KASMC43AHM3_A/H uniquely combines AEC-Q101 qualification, 185 °C operation, JESD201 Class 2 whisker resistance, and MSL Level 1 - making it the only option qualified for high-reliability automotive power rail protection without design compromise.
Availability
3KASMC43AHM3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom power supplies, and consumer appliance main boards requiring stable component supply across extended temperature and surge stress conditions.
Supply support for 3KASMC43AHM3_A/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 series belongs to Vishay's PAR® TVS platform, engineered specifically for AEC-Q101-compliant, high-temperature transient suppression in next-generation automotive power electronics and industrial automation systems.
FAQ
What is the clamping voltage of the 3KASMC43AHM3_A/H at its rated peak pulse current?
The 3KASMC43AHM3_A/H clamps at 69.4 V when subjected to its specified peak pulse current of 43.2 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components connected to the protected line will not experience voltages exceeding this level during standardized surge events - a critical parameter for ensuring compatibility with 5 V or 3.3 V logic interfaces in automotive ECUs.
Is the 3KASMC43AHM3_A/H suitable for use in automotive under-hood applications?
Yes, the 3KASMC43AHM3_A/H is explicitly qualified to AEC-Q101 and rated for continuous operation from -65 °C to +185 °C junction temperature. Its DO-214AB (SMC) package, JESD201 Class 2 whisker resistance, and MSL Level 1 reflow compatibility make it suitable for under-hood deployment in engine control units, transmission control modules, and ADAS power supplies where thermal and mechanical reliability are mandatory.
What does the "HM3" suffix indicate in 3KASMC43AHM3_A/H?
The "HM3" suffix in 3KASMC43AHM3_A/H denotes Vishay's RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance and J-STD-002/JESD22-B102 solderability standards. The "_A/H" further specifies 7-inch tape-and-reel packaging (850 units per reel), distinguishing it from alternate delivery formats like 13-inch reels (e.g., _A/I).
How does the thermal resistance of the 3KASMC43AHM3_A/H affect PCB layout?
The 3KASMC43AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, meaning efficient heat transfer relies on adequate copper area connected to both anode and cathode pads. For optimal thermal performance, Vishay recommends minimum pad dimensions of 3.20 mm × 1.52 mm per lead and thermal vias under pads - especially critical in high-duty-cycle surge environments like motor drive DC buses where sustained power dissipation must be managed.
Can the 3KASMC43AHM3_A/H replace older TVS diodes like P6SMB43A in existing designs?
The 3KASMC43AHM3_A/H is not a direct drop-in replacement for P6SMB43A due to different packages: P6SMB43A uses DO-214AA (SMB), while 3KASMC43AHM3_A/H uses DO-214AB (SMC), which is larger (7.75 mm × 6.22 mm vs. 4.57 mm × 3.94 mm). Layout revision is required. However, its superior 3000 W PPPM, 185 °C rating, and AEC-Q101 qualification justify redesign in new automotive or industrial platforms demanding higher surge resilience.
3KASMC43AHM3_A/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:
- 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/H FAQ
1.How can I place an order for 3KASMC43AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHM3_A/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 3KASMC43AHM3_A/H reliable?
The price and inventory of 3KASMC43AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHM3_A/H?
3KASMC43AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHM3_A/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 3KASMC43AHM3_A/H?
For technical support, including 3KASMC43AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHM3_A/H requirements.
6.How does Aetrix verify that 3KASMC43AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHM3_A/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 3KASMC43AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHM3_A/H?
All 3KASMC43AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHM3_A/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 3KASMC43AHM3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC43AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHM3_A/H Tags
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