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Vishay General Semiconductor - Diodes Division 3KASMC26AHE3_A/I
- Part No.:
- 3KASMC26AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,714
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Product details
Overview
3KASMC26AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 26 V stand-off voltage, 28.9–31.9 V breakdown at 1 mA, 42.1 V clamping voltage at 71.3 A peak pulse current, and 3000 W peak pulse power with 10/1000 µs waveform-designed for automotive-grade overvoltage protection of power rails and signal lines in engine control units.
For engineers reviewing the 3KASMC26AHE3_A/I datasheet, 3KASMC26AHE3_A/I pinout, 3KASMC26AHE3_A/I application, or 3KASMC26AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C maximum junction temperature, low 1.0 µA reverse leakage at VWM, 18.3 °C/W junction-to-lead thermal resistance, and compatibility with automated SMT assembly per J-STD-002 and JESD 22-B102.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping performance under high-temperature stress (TJ up to 185 °C), meeting automotive reliability requirements without derating below 150 °C. Its unidirectional polarity and DO-214AB package support high-surge-current handling while maintaining low incremental surge resistance and fast response time.
The device operates within -65 °C to +185 °C junction temperature range, exhibits 77.5 °C/W junction-to-ambient thermal resistance on standard PCB pads, and maintains 1.0 µA max reverse leakage at 26 V stand-off voltage-enabling robust protection in harsh environments such as under-hood automotive electronics and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during transients without premature conduction. |
| VC @ IPPM | 42.1 V at 71.3 A - Clamping voltage limits downstream IC stress during 3000 W surge events, critical for MOSFET gate and MCU I/O protection. |
| PPPM | 3000 W - Peak pulse power rating with 10/1000 µs waveform supports protection against ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 surges. |
| TJ max | +185 °C - Enables operation in high-temperature zones (e.g., near engines or power converters) without thermal shutdown or parameter drift. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads for reliable reflow soldering. |
Pinout & Package
DO-214AB (SMC) package with cathode indicated by molded band; two-terminal device with axial lead configuration optimized for high-current surge paths and thermal dissipation via PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to protected circuit ground or low-side return path. | Provides low-impedance path to ground during transient clamping; requires direct connection to solid ground plane for effective energy shunting. |
| Cathode | Current exit point during reverse-biased clamping; connected to protected line (e.g., 24 V rail or CAN bus). | Defines polarity-sensitive placement-must be oriented toward positive supply or signal line to enable unidirectional clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and low leakage across temperature and lifetime. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 enables unlimited floor life and reflow at 260 °C peak without popcorn failure. |
| Low RSURGE | Minimal incremental surge resistance preserves clamping accuracy under high di/dt conditions typical in inductive load switching. |
| RoHS & Halogen-Free | Complies with JEDEC JS709A halogen-free standard and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing. |
| Matte tin plating | Lead finish meets J-STD-002 and JESD 22-B102 for consistent wetting and void-free solder joints in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V input and chassis ground to clamp surges above 35 V within nanoseconds. Use Value: Prevents damage to upstream DC-DC controllers and downstream microcontrollers by limiting peak voltage to 42.1 V at 71.3 A. |
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before reaching precision ADC front-end. Use Value: Maintains signal integrity with only 1.0 µA leakage at 26 V, avoiding DC offset errors in millivolt-level sensor signals. |
| Telecom Power Supply Input | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding AC/DC and DC/DC converter inputs against lightning-induced surges (IEC 61000-4-5) in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-stage TVS on bulk input rail to absorb multi-kW pulses before they reach active regulation stages. Use Value: Delivers 3000 W peak pulse power handling with 185 °C junction rating, enabling operation in uncooled enclosures up to 85 °C ambient. |
Use Scenario: Clamping Miller-induced voltage spikes during IGBT/MOSFET switching in servo and HVAC inverters. IC Role / Device Role / Timing Role: Fast-response TVS across gate-source terminals to prevent false turn-on and gate oxide rupture. Use Value: Achieves sub-nanosecond response and 42.1 V clamping to keep gate voltage within ±20 V safe operating area of discrete power switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower 400 W PPPM; 28.9–31.9 V VBR; 42.1 V VC at 9.5 A. | Rated for consumer/industrial use only; not AEC-Q101 qualified; limited to lower-energy transients. | Select when cost and board space constrain design and automotive qualification is unnecessary. |
| 1.5KE27A (ON Semiconductor) | Through-hole DO-201 package; 1500 W PPPM; 28.9–31.9 V VBR; 43.0 V VC at 34.9 A; no AEC-Q101 or MSL-1 rating. | Requires wave soldering; unsuitable for high-density SMT layouts or automotive under-hood environments. | Choose only for legacy through-hole designs where rework flexibility outweighs thermal and reliability constraints. |
Compared with SMAJ26A-E3/57T and 1.5KE27A, the 3KASMC26AHE3_A/I delivers triple the peak pulse power in an AEC-Q101-qualified SMT package with superior thermal resistance (18.3 °C/W vs. >30 °C/W), enabling higher reliability in compact, high-temperature automotive and industrial power systems.
Availability
3KASMC26AHE3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, and telecom power supply inputs requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 3KASMC26AHE3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 3KASMC series is part of Vishay's PAR® (Protection Against Transients) family, engineered specifically for high-temperature, high-surge automotive and industrial applications where sustained reliability under thermal and electrical stress is mandatory.
FAQ
What is the clamping voltage of the 3KASMC26AHE3_A/I at its rated peak pulse current?
The 3KASMC26AHE3_A/I has a maximum clamping voltage (VC) of 42.1 V at 71.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The 3KASMC26AHE3_A/I maintains this clamping performance across its full operating temperature range, supporting robust protection in demanding applications like automotive power distribution.
Is the 3KASMC26AHE3_A/I qualified for automotive use?
Yes, the 3KASMC26AHE3_A/I is AEC-Q101 qualified, having passed rigorous stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its 185 °C maximum junction temperature rating and MSL Level 1 moisture sensitivity classification further validate its suitability for under-hood automotive applications. The 3KASMC26AHE3_A/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix for transient voltage suppression.
What package type does the 3KASMC26AHE3_A/I use, and what are its key mechanical features?
The 3KASMC26AHE3_A/I uses the DO-214AB (SMC) surface-mount package, measuring 0.320" × 0.246" with a 0.060" minimum lead spacing. It features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, a cathode band for polarity identification, and UL 94 V-0 molding compound. The 3KASMC26AHE3_A/I's package supports high thermal conductivity to PCB copper and is compatible with standard reflow profiles up to 260 °C peak temperature.
How does the 3KASMC26AHE3_A/I compare to standard SMAJ-series TVS diodes in terms of surge capability?
The 3KASMC26AHE3_A/I delivers 3000 W peak pulse power-seven times higher than the 400 W rating of the SMAJ26A-E3/57T-while sharing identical breakdown (28.9–31.9 V) and clamping (42.1 V) voltages. Its DO-214AB package offers lower thermal resistance (18.3 °C/W vs. ~35 °C/W for SMA), enabling sustained operation in high-power surge scenarios. The 3KASMC26AHE3_A/I thus extends protection capability beyond standard SMAJ devices into heavy-duty automotive and industrial domains.
What is the reverse leakage current specification for the 3KASMC26AHE3_A/I at its stand-off voltage?
The 3KASMC26AHE3_A/I specifies a maximum reverse leakage current (IR) of 1.0 µA at its 26 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperatures (e.g., 150 °C), leakage remains ≤50 µA, ensuring minimal power loss and signal interference in precision analog or low-power standby circuits. This low leakage is maintained across the full VWM range and contributes to the 3KASMC26AHE3_A/I's suitability for always-on automotive modules.
3KASMC26AHE3_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):
- 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_A/I FAQ
1.How can I place an order for 3KASMC26AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHE3_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 3KASMC26AHE3_A/I reliable?
The price and inventory of 3KASMC26AHE3_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 3KASMC26AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHE3_A/I?
3KASMC26AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHE3_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 3KASMC26AHE3_A/I?
For technical support, including 3KASMC26AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHE3_A/I requirements.
6.How does Aetrix verify that 3KASMC26AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHE3_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 3KASMC26AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHE3_A/I?
All 3KASMC26AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHE3_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 3KASMC26AHE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC26AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC26AHE3_A/I Tags
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