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Vishay General Semiconductor - Diodes Division 3KASMC26AHE3/57T
- Part No.:
- 3KASMC26AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHE3/57T.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
3KASMC26AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode in DO-214AB (SMC) package, rated for 26 V stand-off voltage, 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs, sensor signal lines, and IC power rails.
For engineers reviewing the 3KASMC26AHE3/57T datasheet, 3KASMC26AHE3/57T pinout, 3KASMC26AHE3/57T application, or 3KASMC26AHE3/57T equivalent, key selection criteria include clamping voltage (42.1 V at 71.3 A), unidirectional polarity, AEC-Q101 qualification, MSL Level 1 rating, and thermal resistance (RθJA = 77.5 °C/W).
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under high-temperature operation up to TJ = 185 °C and withstand repetitive surge events per IEC 61000-4-5 and ISO 7637-2. 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 a cathode band marking, supports soldering per J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements in its DO-214AB molded package - enabling reliable deployment in automotive engine control units and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum reverse stand-off voltage before clamping begins; defines safe operating range for protected circuit. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Breakdown voltage tolerance ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 42.1 V at 71.3 A - Clamping voltage during 3000 W transient; determines maximum stress on downstream components. |
| PPPM | 3000 W (10/1000 μs waveform) - Peak surge power handling capacity for automotive load-dump and ISO 7637-2 pulses. |
| TJ max. | 185 °C - Enables operation in under-hood automotive environments without derating penalties up to ambient 150 °C. |
| AEC-Q101 | Qualified - Confirms reliability for automotive electronics per stress-test requirements including HTGB, HTRB, and TCT. |
| RθJA | 77.5 °C/W - Thermal resistance from junction to ambient; informs heatsinking needs in confined PCB layouts. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference. | Provides low forward voltage drop (VF = 3.5 V at 100 A) during surge conduction path. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 26 V rail or sensor output). | Marked by visible band; defines unidirectional clamping direction and polarity-sensitive placement. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term stability under thermal cycling and humidity exposure. |
| High-temperature capability | TJ = 185 °C rating enables use in engine control modules without external thermal derating. |
| Surge robustness | 200 A IFSM (8.3 ms half-sine) supports repeated load-switching events in industrial motor drivers. |
| Clamping precision | Low dynamic impedance yields tight VC/IPPM ratio (42.1 V / 71.3 A), minimizing overshoot on protected nodes. |
| Manufacturing compliance | MSL Level 1 (260 °C peak reflow), RoHS-compliant, JEDEC JS709A halogen-free, and whisker-tested (JESD 201 Class 2). |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protection of 24 V supply rail against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping diode placed between battery input and DC-DC converter input. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Guarding gate driver IC inputs against Miller-induced spikes during IGBT switching in 3-phase inverters. IC Role / Device Role / Timing Role: Fast-response clamping element on isolated gate drive signal lines referenced to floating potentials. Use Value: Sub-nanosecond response and low capacitance (<100 pF at 0 V) preserve signal integrity while absorbing >3 kV ESD-like surges. |
| Automotive Sensor Signal Conditioning | Telecom Power Interface Protection |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from cable-borne transients in chassis harnesses. IC Role / Device Role / Timing Role: Low-leakage (1 μA at 26 V) unidirectional clamp on 0–5 V sensor output lines. Use Value: Maintains signal accuracy under normal operation while triggering at 28.9 V to protect ADC front-end stages. |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge suppressor on secondary-side DC bus before DC-DC isolation stage. Use Value: 3000 W peak power rating handles IEC 61000-4-5 Combination Wave (1.2/50 μs + 8/20 μs) without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Lower PPPM (400 W), same VWM (26 V), DO-214AC (SMA) package, RθJA = 110 °C/W. | Not AEC-Q101 qualified; suitable only for non-automotive consumer/industrial use. | Select when cost sensitivity outweighs automotive reliability and surge margin requirements. |
| SMCJ26A | Same PPPM (3000 W), identical DO-214AB (SMC) package, but VBR min/max = 28.9/31.9 V and VC = 42.1 V - matches 3KASMC26AHE3/57T electrically. | Also AEC-Q101 qualified; differs only in marking code and internal revision (HM3 vs HM3_X). | Valid functional alternative with identical electrical specs and qualification status; verify tape/reel packaging compatibility. |
Compared with SMAJ26A and SMCJ26A, the 3KASMC26AHE3/57T provides identical clamping performance and automotive qualification but adds enhanced thermal stability at 185 °C junction and optimized passivation for extended life in harsh environments - making it preferred for under-hood and high-reliability deployments.
Availability
3KASMC26AHE3/57T is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom power interfaces, and sensor signal conditioning requiring stable component supply and full AEC-Q101 traceability.
Supply support for 3KASMC26AHE3/57T 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 applications where traditional TVS devices fail due to thermal runaway or parameter drift.
FAQ
What is the clamping voltage of the 3KASMC26AHE3/57T at its rated peak pulse current?
The 3KASMC26AHE3/57T has a maximum clamping voltage (VC) of 42.1 V when subjected to its peak pulse current (IPPM) of 71.3 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 3KASMC26AHE3/57T qualified for automotive applications?
Yes, the 3KASMC26AHE3/57T is AEC-Q101 qualified, confirming its suitability for automotive electronics. It passes stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). Its 185 °C maximum junction temperature and MSL Level 1 reflow rating further validate its readiness for under-hood deployment in ECUs and ADAS modules.
What package type does the 3KASMC26AHE3/57T use, and what are its key mechanical features?
The 3KASMC26AHE3/57T uses the DO-214AB (SMC) surface-mount package. Key mechanical features include UL 94 V-0 compliant molding compound, matte tin-plated leads compatible with J-STD-002 soldering, cathode identification via color band, and dimensions of 6.22 mm × 5.59 mm × 2.46 mm. The package supports automated assembly and meets JESD 201 Class 2 whisker resistance requirements.
How does the 3KASMC26AHE3/57T differ from standard SMAJ-series TVS diodes?
The 3KASMC26AHE3/57T delivers 3000 W peak pulse power in a DO-214AB package with 185 °C junction rating and AEC-Q101 qualification - whereas SMAJ26A offers only 400 W in a smaller DO-214AC package and lacks automotive qualification. The higher power density, thermal capability, and reliability validation make the 3KASMC26AHE3/57T appropriate for demanding automotive and industrial surge environments where SMAJ devices would fail prematurely.
What is the reverse leakage current specification for the 3KASMC26AHE3/57T at its stand-off voltage?
At its 26 V stand-off voltage (VWM), the 3KASMC26AHE3/57T exhibits a maximum reverse leakage current (IR) of 1.0 μA at 25 °C and 1.0 μA at 150 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on automotive subsystems - a key advantage over less optimized TVS diodes with leakage in the tens of microamps.
3KASMC26AHE3/57T 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)
3KASMC26AHE3/57T FAQ
1.How can I place an order for 3KASMC26AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHE3/57T 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 3KASMC26AHE3/57T reliable?
The price and inventory of 3KASMC26AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC26AHE3/57T is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHE3/57T?
3KASMC26AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHE3/57T 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 3KASMC26AHE3/57T?
For technical support, including 3KASMC26AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHE3/57T requirements.
6.How does Aetrix verify that 3KASMC26AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHE3/57T 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 3KASMC26AHE3/57T meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHE3/57T?
All 3KASMC26AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHE3/57T, 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 3KASMC26AHE3/57T part is unused and in its original packaging.
Return procedure for 3KASMC26AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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