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Vishay General Semiconductor - Diodes Division 3KASMC43AHM3_B/I
- Part No.:
- 3KASMC43AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC43AHM3_B/I.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,998
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Product details
Overview
3KASMC43AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 43 V stand-off voltage (VWM), 52.8 V breakdown (VBR), 3000 W peak pulse power (10/1000 µs), and 185 °C maximum junction temperature - designed to protect automotive sensor signal lines and MOSFET gates against inductive switching transients.
For engineers reviewing the 3KASMC43AHM3_B/I datasheet, 3KASMC43AHM3_B/I pinout, 3KASMC43AHM3_B/I application, or 3KASMC43AHM3_B/I equivalent, key selection criteria include clamping voltage (69.4 V at IPPM), unidirectional polarity, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance (RθJL = 18.3 °C/W).
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for high-reliability operation. It delivers stable clamping performance across -65 °C to +185 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device operates exclusively in unidirectional mode, with cathode marked by a band, and is characterized by low incremental surge resistance and fast response time - critical for suppressing ESD and load-dump transients on automotive sensor interfaces and power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min) | 47.8 V at 1 mA - guaranteed breakdown initiation threshold under test conditions |
| VC (max) | 69.4 V at IPPM - peak clamped voltage during 3000 W transient, limiting stress on downstream ICs |
| PPPM | 3000 W (10/1000 µs) - surge energy handling capacity for automotive load-dump immunity |
| TJ max. | +185 °C - enables use in under-hood automotive environments without derating |
| Polarity | Unidirectional - protects against positive transients only; requires correct orientation in circuit |
| RθJL | 18.3 °C/W - low junction-to-lead thermal resistance supports reliable power dissipation in SMC package |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to protected line (e.g., sensor output); must be placed upstream of sensitive node |
| Cathode | Current exit terminal; marked by color band | Connected to ground or lower-potential reference; defines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage and breakdown behavior over lifetime and temperature cycling |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling |
| Halogen-free & RoHS-compliant | Meets automotive environmental standards and end-of-life material restrictions |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin |
Applications
| Automotive Sensor Protection | Power Rail Transient Suppression |
|---|---|
Use Scenario: Protecting CAN/LIN bus sensor outputs (e.g., wheel speed, pressure, temperature) from ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input. Use Value: Clamps 69.4 V at 43.2 A surge, preserving signal integrity while meeting AEC-Q100 stress requirements. | Use Scenario: Safeguarding 12 V/24 V automotive power distribution networks against load-dump events (ISO 16750-2). IC Role / Device Role / Timing Role: Primary transient suppression device on main supply rail upstream of DC-DC converters. Use Value: Handles 3000 W peak pulse power with 185 °C TJ rating, enabling placement near high-temperature zones. |
| MOSFET Gate Protection | Industrial I/O Interface Protection |
Use Scenario: Shielding N-channel MOSFET gate drivers from inductive kickback in motor control modules. IC Role / Device Role / Timing Role: Fast-response clamp limiting gate-source voltage to safe levels during turn-off. Use Value: Sub-ns response time and 69.4 V VC prevent gate oxide rupture under 100 V+ transients. | Use Scenario: Hardening analog/digital I/O ports on PLC modules exposed to field wiring surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Front-end protection component on isolated or non-isolated signal inputs. Use Value: 43 V VWM matches common 36 V industrial supply rails; 3000 W rating exceeds Level 4 surge requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43AHE3_A/H | Same VWM/VBR/VC specs, but lower PPPM (400 W), smaller SMA package, non-AEC-Q101 | Not qualified for automotive; limited to consumer/industrial board-level protection | Select when cost and space are critical and AEC-Q101 is not required |
| SMCJ43AHE3_A/H | Same SMC package and AEC-Q101 qualification, but higher PPPM (1500 W), lower VC (69.4 V same), different thermal resistance (RθJL = 12.5 °C/W) | Lower surge rating limits suitability for severe load-dump scenarios | Choose if lower clamping voltage consistency is prioritized over peak power handling |
Compared with SMAJ43AHE3_A/H and SMCJ43AHE3_A/H, the 3KASMC43AHM3_B/I delivers highest peak pulse power (3000 W) in an AEC-Q101–qualified, halogen-free SMC package - making it optimal for under-hood automotive systems requiring robust, long-lifetime transient immunity.
Availability
3KASMC43AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, power rail transient suppression, and MOSFET gate safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 3KASMC43AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMCxxA family targets high-energy transient suppression in harsh environments, specifically engineered for AEC-Q101 compliance, 185 °C operation, and robust clamping in automotive power and signal paths.
FAQ
What is the clamping voltage of the 3KASMC43AHM3_B/I at its rated peak pulse current?
The 3KASMC43AHM3_B/I has a maximum clamping voltage (VC) of 69.4 V when subjected to its peak pulse current (IPPM) of 43.2 A under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88480) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 3KASMC43AHM3_B/I AEC-Q101 qualified and what does the 'HM3' suffix indicate?
Yes, the 3KASMC43AHM3_B/I is AEC-Q101 qualified. The 'HM3' suffix denotes halogen-free, RoHS-compliant construction with whisker-resistant matte tin plating and full qualification to AEC-Q101 stress tests - distinguishing it from HE3 variants which are RoHS-compliant but not halogen-free. This makes the 3KASMC43AHM3_B/I suitable for automotive applications with strict material content requirements.
What is the thermal resistance from junction to leads (RθJL) for the 3KASMC43AHM3_B/I, and why does it matter?
The 3KASMC43AHM3_B/I has a typical junction-to-leads thermal resistance (RθJL) of 18.3 °C/W. This parameter directly impacts how effectively heat generated during transient clamping is conducted away through the PCB copper pads and traces. A lower RθJL enables higher sustained surge capability and improved reliability in thermally constrained layouts - especially critical in automotive modules where ambient temperatures exceed 100 °C.
Can the 3KASMC43AHM3_B/I be used in bidirectional protection circuits?
No, the 3KASMC43AHM3_B/I is unidirectional only, as explicitly stated in the Vishay datasheet. It clamps positive transients relative to ground and conducts only in one polarity. For bidirectional protection (e.g., AC lines or differential buses), a separate bidirectional TVS such as SMBJ43CA or a back-to-back configuration would be required - the 3KASMC43AHM3_B/I must be oriented with cathode toward ground to function correctly.
What packaging options are available for the 3KASMC43AHM3_B/I, and what does the '/B/I' suffix mean?
The '/B/I' suffix in 3KASMC43AHM3_B/I indicates halogen-free, RoHS-compliant, AEC-Q101–qualified product supplied in 13-inch plastic tape and reel format, with a base quantity of 3500 units per reel. The 'B' denotes revision level, and 'I' specifies the 13" reel delivery mode - distinct from '/B/H', which uses 7" reels (850 units). Both share identical electrical and thermal specifications.
3KASMC43AHM3_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):
- 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 (SMC)
3KASMC43AHM3_B/I FAQ
1.How can I place an order for 3KASMC43AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC43AHM3_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 3KASMC43AHM3_B/I reliable?
The price and inventory of 3KASMC43AHM3_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 3KASMC43AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC43AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC43AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC43AHM3_B/I?
3KASMC43AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC43AHM3_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 3KASMC43AHM3_B/I?
For technical support, including 3KASMC43AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC43AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC43AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC43AHM3_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 3KASMC43AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC43AHM3_B/I?
All 3KASMC43AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC43AHM3_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 3KASMC43AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC43AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC43AHM3_B/I Tags
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