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Vishay General Semiconductor - Diodes Division 3KASMC26AHM3_B/I
- Part No.:
- 3KASMC26AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHM3_B/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,070
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Product details
Overview
3KASMC26AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 26 V stand-off voltage (VWM), 30.4 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC26AHM3_B/I datasheet, 3KASMC26AHM3_B/I pinout, 3KASMC26AHM3_B/I application, or 3KASMC26AHM3_B/I equivalent, key selection criteria include clamping voltage (42.1 V at IPPM), low incremental surge resistance, AEC-Q101 qualification, and halogen-free RoHS compliance per ordering suffix HM3.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for high-temperature stability. It delivers 3000 W peak pulse power handling under 10/1000 μs waveform while maintaining clamping voltage ≤42.1 V at 71.3 A peak surge current.
Rated for TJ = −65 °C to +185 °C operation and qualified to AEC-Q101, the device supports automotive and industrial applications requiring MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility. Its unidirectional polarity enables DC-biased line protection without reverse conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (nom) | 30.4 V at 1.0 mA - precise breakdown threshold enabling accurate overvoltage trip point |
| VC @ IPPM | 42.1 V at 71.3 A - low clamping voltage limits stress on protected downstream ICs |
| PPPM | 3000 W (10/1000 μs) - robust surge immunity against inductive switching transients |
| TJ max | +185 °C - supports under-hood automotive environments and high-power industrial layouts |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint |
| AEC-Q101 | Qualified - validated reliability for automotive electronics per stress test requirements |
| RoHS / Halogen-Free | Compliant per HM3 suffix - meets automotive environmental and regulatory mandates |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads; cathode indicated by color band; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit terminal during forward conduction; clamping node in reverse bias | Connected to protected line - absorbs transient energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift <0.088 %/°C and reliable operation up to 185 °C junction temperature |
| 3000 W peak pulse power (10/1000 μs) | Withstands high-energy transients from relay coil decay or motor commutation without degradation |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during surge events, protecting sensitive gate oxides and I/O cells |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free PCB assembly without preconditioning or special handling |
| Halogen-free & RoHS-compliant (HM3) | Fulfills automotive OEM material declarations and end-of-life recycling requirements |
Applications
| Automotive Powertrain Sensors | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting crankshaft/camshaft position sensor signal lines from load dump and alternator ripple in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and ECU input to limit transient excursions. Use Value: Clamps to 42.1 V at 71.3 A, preventing damage to 5 V or 3.3 V ADC front-ends while surviving 185 °C under-hood ambient. |
Use Scenario: Safeguarding IGBT gate drivers against Miller-induced voltage spikes during high-dV/dt switching. IC Role / Device Role / Timing Role: Placed across gate-to-emitter to suppress >20 V transients before they exceed gate oxide rating. Use Value: Fast response and low incremental resistance ensure clamping occurs within nanoseconds, preserving driver timing integrity. |
| Telecom Line Interface Protection | Consumer Appliance Control Board |
Use Scenario: Shielding RS-485 transceivers from ESD and lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary protection device on differential bus lines, upstream of secondary TVS or current-limiting resistors. Use Value: 3000 W rating handles multi-kV surge waveforms per IEC 61000-4-5, while 42.1 V VC avoids false triggering of receiver thresholds. |
Use Scenario: Securing microcontroller I/O pins connected to push-button inputs or relay feedback circuits in washing machines. IC Role / Device Role / Timing Role: Localized transient suppression at board-level interfaces subject to user-induced ESD and contact bounce. Use Value: AEC-Q101 qualification ensures long-term reliability in high-cycle consumer environments; SMC package allows automated placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3_A/H | Same VWM (26 V), lower PPPM (400 W), SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 7637-2 | Select only for space-constrained consumer designs where 3000 W surge immunity is not required |
| SMCJ26AHE3_A/H | Same VWM (26 V), identical PPPM (3000 W), same SMC package, but HE3 (not HM3) suffix | RoHS-compliant but not halogen-free; lacks automotive material declaration compliance | Acceptable for industrial use where halogen-free certification is not mandated |
Compared with 3KASMC26AHM3_B/I, SMAJ26AHE3_A/H offers reduced surge capability and thermal robustness, while SMCJ26AHE3_A/H matches electrical performance but omits halogen-free assurance - making 3KASMC26AHM3_B/I the sole choice for AEC-Q101 + halogen-free automotive deployments.
Availability
3KASMC26AHM3_B/I is available at Aetrix Electronics and suitable for automotive powertrain sensors, industrial motor drive gate protection, telecom line interface protection, and consumer appliance control boards requiring stable component supply with full traceability and lifecycle management.
Supply support for 3KASMC26AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on high-reliability and automotive-grade performance.
The 3KASMCxxA family was engineered specifically for high-energy transient suppression in harsh environments - targeting AEC-Q101 compliance, 185 °C operation, and robust 10/1000 μs surge handling in automotive and industrial systems.
FAQ
What is the clamping voltage of the 3KASMC26AHM3_B/I at its rated peak pulse current?
The 3KASMC26AHM3_B/I has a maximum clamping voltage (VC) of 42.1 V when subjected to its peak pulse current (IPPM) of 71.3 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88480) and reflects the actual voltage seen by protected circuitry during worst-case surge events. The 3KASMC26AHM3_B/I maintains this clamping performance across its qualified temperature range.
Is the 3KASMC26AHM3_B/I qualified for automotive applications?
Yes, the 3KASMC26AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the 3KASMCxxA series. The HM3 suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This makes the 3KASMC26AHM3_B/I suitable for automotive powertrain, body electronics, and ADAS subsystems where reliability under extended temperature cycling and mechanical stress is mandatory.
What does the "HM3" suffix indicate in 3KASMC26AHM3_B/I?
The "HM3" suffix in 3KASMC26AHM3_B/I identifies a halogen-free, RoHS-compliant, and AEC-Q101-qualified variant with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. It distinguishes the part from HE3-suffixed versions (RoHS-compliant but not halogen-free) and confirms compliance with automotive material declarations and environmental regulations.
What is the thermal resistance of the 3KASMC26AHM3_B/I from junction to ambient?
The 3KASMC26AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. This value assumes standard FR-4 PCB with specified copper area and is critical for estimating temperature rise under continuous power dissipation - though the device is primarily intended for transient, not steady-state, power handling.
How does the 3KASMC26AHM3_B/I differ from the 3KASMC26AHE3_B/I?
The 3KASMC26AHM3_B/I and 3KASMC26AHE3_B/I share identical electrical specifications (VWM = 26 V, VBR = 30.4 V, PPPM = 3000 W) and SMC package, but differ in material composition: HM3 denotes halogen-free construction, while HE3 is RoHS-compliant but contains halogens. Both are AEC-Q101 qualified, but only HM3 satisfies strict automotive OEM halogen bans and end-of-life recycling mandates.
3KASMC26AHM3_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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71.3A
- 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)
3KASMC26AHM3_B/I FAQ
1.How can I place an order for 3KASMC26AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHM3_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 3KASMC26AHM3_B/I reliable?
The price and inventory of 3KASMC26AHM3_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 3KASMC26AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHM3_B/I?
3KASMC26AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHM3_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 3KASMC26AHM3_B/I?
For technical support, including 3KASMC26AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHM3_B/I requirements.
6.How does Aetrix verify that 3KASMC26AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHM3_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 3KASMC26AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHM3_B/I?
All 3KASMC26AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHM3_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 3KASMC26AHM3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC26AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC26AHM3_B/I Tags
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