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Vishay General Semiconductor - Diodes Division 3KASMC26HE3_A/I
- Part No.:
- 3KASMC26HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26HE3_A/I.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
3KASMC26HE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for high-energy surge clamping in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 42.1 V under 71.3 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients in engine control units and motor drives.
For engineers reviewing the 3KASMC26HE3_A/I datasheet, 3KASMC26HE3_A/I pinout, 3KASMC26HE3_A/I application, or 3KASMC26HE3_A/I equivalent, key selection criteria include its DO-214AB (SMC) package compatibility with high-reliability PCB layouts, AEC-Q101 qualification for automotive use, unidirectional polarity, and verified clamping performance at elevated temperatures.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for stable breakdown behavior and low incremental surge resistance. Its 28.9–31.9 V breakdown voltage range (at 1 mA) and 26 V stand-off voltage ensure reliable blocking during normal operation while triggering fast clamping under transient overvoltage events.
The device meets MSL Level 1 per J-STD-020 (260 °C peak reflow), features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 - confirming suitability for under-hood automotive electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum reverse working voltage; defines safe DC/AC operating limit before leakage increases significantly. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Verified breakdown threshold ensures predictable turn-on during surges without premature conduction. |
| VC @ IPPM | 42.1 V at 71.3 A - Clamping voltage under full 3000 W surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 3000 W (10/1000 μs waveform) - Peak surge energy handling capacity; supports protection against ISO 7637-2 Pulse 1/2a/5a and similar transients. |
| TJ max. | 185 °C - Enables operation in high-temperature environments such as powertrain ECUs without derating penalties. |
| IR @ VWM | 1.0 μA - Ultra-low reverse leakage preserves system efficiency and minimizes standby power loss in battery-powered applications. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead spacing for automated assembly. |
Pinout & Package
DO-214AB (SMC) package with cathode indicated by molded band; two-terminal unidirectional configuration. 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 low-impedance return path; forms current sink during clamping event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); carries surge current into anode during overvoltage condition. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| 185 °C junction rating | Enables uninterrupted operation in under-hood environments without thermal shutdown or parameter drift. |
| 3000 W peak pulse power | Withstands high-energy transients from load dump or inductive kickback without failure or parametric shift. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - no baking required prior to assembly. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage overshoot during clamping, reducing stress on protected MOSFET gate oxides and logic inputs. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules from load-dump transients (ISO 16750-2). IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and input filter capacitor. Use Value: Limits voltage excursion to ≤42.1 V during 3000 W surges, preventing damage to PMICs and microcontrollers rated for 36 V absolute maximum. |
Use Scenario: Safeguarding gate drivers and IGBTs in variable-frequency drives from inductive switching spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus or gate-source terminals to absorb flyback energy. Use Value: Fast response time and low Rsurge ensure clamping occurs within nanoseconds, avoiding destructive dv/dt-induced latch-up. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Guarding AC/DC adapter outputs against lightning-induced surges entering via PoE or external ports. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side 12 V output rail upstream of DC-DC converters. Use Value: 1.0 μA leakage at 26 V maintains tight regulation and avoids false triggering in always-on standby circuits. |
Use Scenario: Shielding microcontroller I/O and relay driver circuits in washing machine main boards from relay coil back-EMF. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to each relay coil termination point. Use Value: DO-214AB footprint allows placement directly at noise source, minimizing loop inductance and improving suppression efficacy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | Lower PPPM (600 W), same VWM/VBR, DO-214AA (SMB) package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or load dump scenarios | Select when space-constrained and surge energy is ≤600 W; verify thermal derating at 185 °C is not required. |
| SMCJ26A | Same PPPM (3000 W), identical DO-214AB package, but only rated to 175 °C TJ max and not AEC-Q101 qualified | Acceptable for industrial use but excluded from automotive production due to missing qualification | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated and 175 °C suffices. |
Compared with SMBJ26A and SMCJ26A, the 3KASMC26HE3_A/I uniquely combines 3000 W surge capability, 185 °C operation, and AEC-Q101 qualification in a single DO-214AB device - making it the only option qualified for high-temperature automotive power rail protection without design compromise.
Availability
3KASMC26HE3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, and telecom power supplies requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 3KASMC26HE3_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, and passive components for demanding industrial and automotive applications.
The 3KASMC series belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh-temperature automotive environments and mission-critical industrial systems.
FAQ
What is the clamping voltage of the 3KASMC26HE3_A/I under maximum surge conditions?
The 3KASMC26HE3_A/I clamps at 42.1 V when subjected to its rated peak pulse current of 71.3 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and reflects the maximum voltage seen by downstream components during a full 3000 W transient event. The 3KASMC26HE3_A/I maintains this clamping performance across its full operating temperature range up to 185 °C junction temperature.
Is the 3KASMC26HE3_A/I suitable for automotive applications?
Yes, the 3KASMC26HE3_A/I is AEC-Q101 qualified and rated for 185 °C junction temperature, making it suitable for under-hood automotive applications including engine control units, body control modules, and ADAS power supplies. Its DO-214AB package meets MSL Level 1, and its construction complies with RoHS and JEDEC JS709A halogen-free standards - all confirmed in Vishay document 89962.
What does the "_A/I" suffix indicate in 3KASMC26HE3_A/I?
The "_A/I" suffix in 3KASMC26HE3_A/I denotes the packaging configuration: "I" specifies 13-inch diameter plastic tape and reel with 3500 units per reel, while "A" indicates the base P/NHM3 variant - RoHS-compliant, AEC-Q101 qualified, and meeting JESD 201 Class 2 whisker resistance. This ordering code is defined in the Vishay 89962 datasheet's Ordering Information table.
How does the 3KASMC26HE3_A/I compare to standard SMCJ26A devices?
The 3KASMC26HE3_A/I matches the SMCJ26A in package (DO-214AB), peak pulse power (3000 W), and electrical ratings but adds AEC-Q101 qualification and extends maximum junction temperature from 175 °C to 185 °C. These enhancements make the 3KASMC26HE3_A/I appropriate for extended-life automotive deployments where thermal margin and qualification compliance are mandatory.
What is the reverse leakage current specification for the 3KASMC26HE3_A/I at rated stand-off voltage?
The 3KASMC26HE3_A/I exhibits a maximum reverse leakage current 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 - a value confirmed in the Electrical Characteristics table of Vishay document 89962 and critical for preserving efficiency in always-on automotive subsystems.
3KASMC26HE3_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:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 64.4A
- 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)
3KASMC26HE3_A/I FAQ
1.How can I place an order for 3KASMC26HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26HE3_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 3KASMC26HE3_A/I reliable?
The price and inventory of 3KASMC26HE3_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 3KASMC26HE3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC26HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26HE3_A/I?
3KASMC26HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26HE3_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 3KASMC26HE3_A/I?
For technical support, including 3KASMC26HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26HE3_A/I requirements.
6.How does Aetrix verify that 3KASMC26HE3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC26HE3_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 3KASMC26HE3_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC26HE3_A/I?
All 3KASMC26HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26HE3_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 3KASMC26HE3_A/I part is unused and in its original packaging.
Return procedure for 3KASMC26HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC26HE3_A/I Tags
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