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Vishay General Semiconductor - Diodes Division 3KASMC26AHM3/57T
- Part No.:
- 3KASMC26AHM3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHM3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,008
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Product details
Overview
3KASMC26AHM3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000 W peak pulse power (10/1000 μs), 26 V stand-off voltage (VWM), and 42.1 V maximum clamping voltage (VC) at 71.3 A peak surge current. It operates up to 185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 3KASMC26AHM3/57T datasheet, 3KASMC26AHM3/57T pinout, 3KASMC26AHM3/57T application, or 3KASMC26AHM3/57T equivalent, this device serves as a high-reliability, high-temperature transient suppressor for automotive power rails, sensor signal lines, and MOSFET gate protection where fast response (<1 ns), low incremental surge resistance, and MSL Level 1 reflow compatibility are critical.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its unidirectional polarity enables integration into DC-biased circuits such as 12 V/24 V automotive power domains and low-side switched loads.
Designed for operation up to TJ = 185 °C, it maintains clamping performance across extended thermal ranges without derating loss below 150 °C. The DO-214AB (SMC) package delivers robust thermal dissipation (RθJL = 18.3 °C/W) and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 26 V - Maximum continuous reverse voltage before clamping begins; sets operating margin above nominal 24 V automotive rail. |
| VBR (Breakdown Voltage) | 28.9–31.9 V at 1 mA - Confirmed breakdown threshold ensures reliable turn-on during transients exceeding system voltage. |
| VC (Clamping Voltage) | 42.1 V at IPPM = 71.3 A - Limits voltage seen by protected ICs during 3000 W surge, preserving downstream logic integrity. |
| PPPM (Peak Pulse Power) | 3000 W (10/1000 μs) - Withstands ISO 7637-2 Pulse 1/2a/5a-level surges without degradation. |
| TJ max. | 185 °C - Enables placement near hot components (e.g., power converters, engine control units) without thermal derating. |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Package | DO-214AB (SMC) - Industry-standard SMT outline with 0.305" × 0.220" footprint and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
DO-214AB (SMC) package: cathode-indicating band on one end; two-terminal axial configuration with no internal circuitry beyond the PN junction. Leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop when transient exceeds VWM. |
| Cathode | High-side connection point | Connected to protected line (e.g., battery rail, sensor output); color band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces leakage drift and enhances long-term stability at 150–185 °C. |
| MSL Level 1 rating | Compatible with standard 260 °C peak reflow profiles without preconditioning-no moisture sensitivity handling required. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., load dump, inductive kickback), improving clamping fidelity. |
| Uni-directional polarity | Enables precise placement in DC-biased paths without reverse conduction risk during normal operation. |
Applications
| Automotive Power Rail Protection | Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump transients (ISO 7637-2 Pulse 5a) on 24 V commercial vehicle battery feeds. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input. Use Value: Clamps peak voltage to ≤42.1 V at 71.3 A, preventing overvoltage damage to downstream regulators and microcontrollers. |
Use Scenario: Protects analog outputs of pressure/temperature sensors in engine bay against ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between sensor output and ground. Use Value: Responds in <1 ns to transients while maintaining signal integrity due to minimal parasitic capacitance (typ. <100 pF at 0 V). |
| MOSFET Gate Protection | Industrial Motor Drive Control |
Use Scenario: Shields N-channel MOSFET gates from Miller-induced voltage spikes during high-speed switching. IC Role / Device Role / Timing Role: TVS placed between gate and source terminals of power FETs in half-bridge inverters. Use Value: Limits gate-source voltage to safe levels (<±20 V), avoiding oxide breakdown and ensuring reliable switching lifetime. |
Use Scenario: Guards PLC I/O modules against inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: TVS installed across relay coil terminals or digital output lines. Use Value: Absorbs 3000 W surge energy without failure, enabling uninterrupted operation in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/5AT (Vishay) | Same VWM (26 V), lower PPPM (400 W), DO-214AC (SMA) package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin at 150 °C ambient. |
| 1.5KE27A (ON Semiconductor) | Higher VWM (27 V), same VC (42.1 V), through-hole DO-201 package, 1500 W PPPM, not AEC-Q101 qualified. | Requires wave soldering; lacks automotive qualification and high-temperature capability (TJ max = 175 °C). | Use in non-automotive industrial designs where AEC-Q101 is not mandated and PCB layout permits through-hole mounting. |
Compared with SMAJ26A-E3/5AT and 1.5KE27A, the 3KASMC26AHM3/57T delivers 7.5× higher surge power handling, AEC-Q101 validation, and superior thermal robustness (185 °C vs. 175 °C), making it the only option qualified for under-hood automotive deployment with full ISO 7637-2 compliance.
Availability
3KASMC26AHM3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, sensor interface hardening, MOSFET gate safeguarding, and industrial motor drive control requiring stable component supply across production lifecycles.
Supply support for 3KASMC26AHM3/57T 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series belongs to Vishay's PAR® TVS platform, engineered specifically for high-temperature, high-surge automotive environments where AEC-Q101 compliance and 185 °C operation are mandatory design requirements.
FAQ
What is the clamping voltage of the 3KASMC26AHM3/57T at its rated peak pulse current?
The 3KASMC26AHM3/57T exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its specified peak pulse current (IPPM) of 71.3 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected circuitry during standardized surge events.
Is the 3KASMC26AHM3/57T suitable for use in automotive under-hood applications?
Yes, the 3KASMC26AHM3/57T is AEC-Q101 qualified and rated for continuous operation up to 185 °C junction temperature, making it explicitly designed for under-hood automotive applications such as engine control units, transmission modules, and battery management systems exposed to extreme thermal and electrical stress.
What does the "HM3/57T" suffix indicate in the 3KASMC26AHM3/57T part number?
The "HM3" denotes Vishay's RoHS-compliant, AEC-Q101-qualified base variant with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. "57T" specifies the packaging: 7-inch diameter plastic tape and reel containing 850 units, optimized for automated SMT placement.
How does the 3KASMC26AHM3/57T compare to standard SMAJ-series TVS diodes in surge handling capability?
The 3KASMC26AHM3/57T provides 3000 W peak pulse power (10/1000 μs), which is 7.5× higher than the 400 W rating of the SMAJ26A. Its DO-214AB (SMC) package also offers lower thermal resistance (RθJL = 18.3 °C/W vs. ~30 °C/W for SMA), enabling sustained performance in high-power transient scenarios like ISO 7637-2 Pulse 5a.
Does the 3KASMC26AHM3/57T require special PCB layout considerations for thermal management?
Yes - the 3KASMC26AHM3/57T should be mounted using Vishay's recommended minimum pad layout (0.126" × 0.060") to ensure optimal heat dissipation. Excessive copper removal or undersized pads will impair its ability to sustain 6.0 W power dissipation at TL = 75 °C and compromise surge endurance during repeated events.
3KASMC26AHM3/57T 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):
- 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 (SMCJ)
3KASMC26AHM3/57T FAQ
1.How can I place an order for 3KASMC26AHM3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHM3/57T 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 3KASMC26AHM3/57T reliable?
The price and inventory of 3KASMC26AHM3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC26AHM3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHM3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHM3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHM3/57T?
3KASMC26AHM3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHM3/57T 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 3KASMC26AHM3/57T?
For technical support, including 3KASMC26AHM3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHM3/57T requirements.
6.How does Aetrix verify that 3KASMC26AHM3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHM3/57T 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 3KASMC26AHM3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHM3/57T?
All 3KASMC26AHM3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHM3/57T, 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 3KASMC26AHM3/57T part is unused and in its original packaging.
Return procedure for 3KASMC26AHM3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC26AHM3/57T Tags
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