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Vishay General Semiconductor - Diodes Division 3KASMC43HE3_A/I
- Part No.:
- 3KASMC43HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43HE3_A/I.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,244
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Product details
Overview
3KASMC43HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 43 V stand-off voltage, 69.4 V clamping voltage at 43.2 A peak pulse current, 3000 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - deployed for automotive power line and sensor signal protection.
For engineers reviewing the 3KASMC43HE3_A/I datasheet, 3KASMC43HE3_A/I pinout, 3KASMC43HE3_A/I application, or 3KASMC43HE3_A/I equivalent, key selection criteria include unidirectional clamping behavior, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 77.5 °C/W junction-to-ambient thermal resistance, and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature operation up to TJ = 185 °C and withstand repetitive surge events per IEC 61000-4-5. Its low incremental surge resistance and fast response time ensure effective suppression of transients induced by inductive load switching.
The device operates exclusively in unidirectional mode with cathode band polarity marking, meets UL 94 V-0 flammability rating in its molding compound, and is qualified to AEC-Q101 for automotive-grade reliability - verified under high-temperature storage and temperature cycling stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on margin |
| VC (Clamping Voltage) | 69.4 V at IPPM = 43.2 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 3000 W - Sustains high-energy transients without failure under standardized waveform |
| TJ max. | 185 °C - Enables use in under-hood automotive environments and high-power industrial systems |
| RθJA | 77.5 °C/W - Thermal performance baseline for PCB pad layout design and derating calculations |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTRB, HTGB, and TCT |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Compliant with J-STD-002 solderability and JESD22-B102 whisker testing (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides low VF path during surge conduction; must be routed with minimal inductance to avoid voltage overshoot |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 12 V rail or sensor output) | Defines clamping polarity; color band identifies this terminal for correct PCB orientation and functional protection |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage performance (<1 µA at VWM) across -65 °C to +185 °C operating range |
| 3000 W peak pulse power (10/1000 µs) | Protects against ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 4 surges without degradation |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without popcorn effect or interfacial delamination |
| Uni-directional polarity only | Prevents unintended conduction on negative transients; requires explicit system-level polarity alignment |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for automotive cabin and engine control module enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V/24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and chassis ground to limit overvoltage to safe levels. Use Value: Maintains system uptime by preventing damage to downstream regulators and microcontrollers during ISO 16750-2 load dump events. |
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response shunt element absorbing sub-100 ns ESD pulses before they reach precision ADC inputs. Use Value: Preserves sensor accuracy and eliminates field failures caused by ±8 kV contact ESD per IEC 61000-4-2. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment front-end circuits against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device in series with DC-DC converter input, coordinated with upstream GDT or MOV. Use Value: Limits let-through voltage to <70 V during 10/1000 µs surges, enabling robust 48 V system design per GR-1089-CORE. |
Use Scenario: Mitigating commutation spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp inductive kickback below MOSFET drain-source breakdown. Use Value: Extends power FET lifetime by reducing voltage stress during frequent on/off cycling at 12–24 V supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/57T (Vishay) | Same VWM (43 V) and VC (69.4 V), but lower PPPM (400 W) and smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal derating for ambient >85 °C |
| 1.5KE43A (ON Semiconductor) | Through-hole TO-218 package, same VWM/VC specs, but higher RθJA (~30 °C/W on heatsink) and no AEC-Q101 qualification | Requires manual assembly; not approved for automotive production use | Use only in non-automotive industrial prototypes where reflow compatibility and qualification are not required |
Compared with SMAJ43A-E3/57T and 1.5KE43A, the 3KASMC43HE3_A/I delivers 7.5× higher peak pulse power in an AEC-Q101-qualified SMT package, enabling single-device compliance with automotive load dump standards without external heatsinking or parallel devices.
Availability
3KASMC43HE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power systems requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 3KASMC43HE3_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, high-temperature operation, and automotive qualification.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments, prioritizing high-temperature stability (TJ = 185 °C), robust surge handling (3000 W), and SMT manufacturability.
FAQ
What is the clamping voltage of the 3KASMC43HE3_A/I at its rated peak pulse current?
The 3KASMC43HE3_A/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current (IPPM) of 43.2 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during surge events. The 3KASMC43HE3_A/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC43HE3_A/I qualified for automotive applications?
Yes, the 3KASMC43HE3_A/I is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). It is designed for under-hood and body electronics where junction temperatures reach up to 185 °C. The 3KASMC43HE3_A/I is commonly used in automotive ECUs, ADAS sensor modules, and infotainment power supplies.
What package type does the 3KASMC43HE3_A/I use, and what are its key mechanical features?
The 3KASMC43HE3_A/I uses the DO-214AB (SMC) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 whisker testing. Its molding compound meets UL 94 V-0 flammability rating, and it achieves MSL Level 1 per J-STD-020. The cathode is marked by a visible color band, and the device is supplied in 13" tape-and-reel (I code) with 3500 units per reel.
How does the 3KASMC43HE3_A/I compare to the SMAJ43A in terms of surge capability?
The 3KASMC43HE3_A/I delivers 3000 W peak pulse power (10/1000 µs), whereas the SMAJ43A is rated for only 400 W - a 7.5× difference. Both share identical VWM (43 V) and VC (69.4 V), but the 3KASMC43HE3_A/I's larger SMC package enables superior thermal dissipation and sustained surge handling. The 3KASMC43HE3_A/I is therefore preferred for ISO 7637-2 Pulse 5a load dump protection where the SMAJ43A would fail.
What is the maximum junction temperature rating for the 3KASMC43HE3_A/I, and why is it significant?
The 3KASMC43HE3_A/I has a maximum junction temperature (TJ max.) of 185 °C, significantly exceeding the 150 °C typical for standard TVS diodes. This enables reliable operation in high-ambient environments such as automotive engine compartments and industrial motor drives. The elevated rating directly supports AEC-Q101 qualification and ensures long-term parametric stability under thermal stress - a critical requirement for the 3KASMC43HE3_A/I's target applications.
3KASMC43HE3_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:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 39.1A
- 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)
3KASMC43HE3_A/I FAQ
1.How can I place an order for 3KASMC43HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43HE3_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 3KASMC43HE3_A/I reliable?
The price and inventory of 3KASMC43HE3_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 3KASMC43HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC43HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43HE3_A/I?
3KASMC43HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43HE3_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 3KASMC43HE3_A/I?
For technical support, including 3KASMC43HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC43HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC43HE3_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 3KASMC43HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC43HE3_A/I?
All 3KASMC43HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43HE3_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 3KASMC43HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC43HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43HE3_A/I Tags
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