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Vishay General Semiconductor - Diodes Division 3KASMC26AHE3_B/I
- Part No.:
- 3KASMC26AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHE3_B/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
3KASMC26AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in SMC (DO-214AB) 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 IPPM. It operates up to TJ = 185 °C and is AEC-Q101 qualified for automotive electronics protection against inductive switching transients.
For engineers reviewing the 3KASMC26AHE3_B/I datasheet, 3KASMC26AHE3_B/I pinout, 3KASMC26AHE3_B/I application, or 3KASMC26AHE3_B/I equivalent, this page delivers verified electrical parameters, thermal performance data, SMC package layout guidance, and direct alternatives for high-reliability transient suppression in automotive power rails and sensor interfaces.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with junction passivation optimized for stable breakdown behavior under high-temperature stress. Its unidirectional polarity enables robust clamping of positive-going transients on DC power lines without reverse conduction path concerns.
Rated for 3000 W peak pulse power per 10/1000 μs waveform and 200 A non-repetitive forward surge current (8.3 ms half-sine), it delivers low incremental surge resistance and fast response time-critical for protecting MOSFETs and ICs from load-dump and ISO 7637-2 pulses in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V automotive systems. |
| VBR (min) | 28.9 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 42.1 V - Clamping voltage at 71.3 A peak pulse current; limits transient energy delivered to downstream circuitry. |
| PPPM | 3000 W - Peak pulse power handling capability per 10/1000 μs waveform; meets ISO 16750-2 and SAE J1113-11 requirements. |
| TJ max. | +185 °C - Maximum junction temperature rating; supports operation in engine bay and powertrain control modules. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead pitch; compatible with automated placement and reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC-Q101 Rev G. |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads, UL 94 V-0 flammability rating, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp output node | Connected to protected line; conducts during overvoltage events to shunt current to ground. |
| Anode | Reference/return node | Typically tied to system ground or low-impedance return path; completes clamping loop during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure reduces parameter drift over temperature and lifetime, ensuring stable VBR across 185 °C operation. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020; allows unlimited floor life and standard reflow without baking preconditioning. |
| Low RSURGE | Incremental surge resistance minimized to sustain high IPPM without excessive VC rise-critical for protecting low-voltage logic interfaces. |
| RoHS + Halogen-free option | HE3 suffix denotes RoHS-compliant construction; HM3 variant adds halogen-free molding compound for enhanced environmental compliance. |
| Color-band polarity marking | Visible cathode identification enables rapid visual verification during manual inspection and automated optical inspection (AOI). |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Stage |
|---|---|
Use Scenario: Suppresses load-dump transients (up to 60 V, 400 ms) on 24 V battery-fed power rails in ADAS domain controllers. IC Role / Device Role / Timing Role: Primary clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits voltage seen by upstream regulator to ≤42.1 V during 3000 W surges, preventing latch-up or permanent damage. |
Use Scenario: Protects microcontroller I/O and CAN transceiver power pins from inductive kickback generated by fuel injector drivers. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector entry point on ECU PCB. Use Value: Responds within nanoseconds to clamp 200 A surge peaks while maintaining <1.0 μA leakage at 26 V nominal rail. |
| Industrial Motor Drive Gate Driver Supply | Telecom DC Power Interface |
Use Scenario: Shields isolated gate driver bias supplies from flyback spikes induced by IGBT switching in servo drives. IC Role / Device Role / Timing Role: Unidirectional TVS connected between isolated 15 V supply and common reference plane. Use Value: Withstands repeated 10/1000 μs transients up to 3000 W without degradation, validated per AEC-Q101 HTRB. |
Use Scenario: Guards PoE-powered equipment front-end from lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: First-line transient suppressor before primary DC-DC conversion stage. Use Value: Delivers 42.1 V clamping at 71.3 A with thermal resistance RθJL = 18.3 °C/W, enabling reliable operation without heatsink. |
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-E3/5AT | Lower PPPM (400 W), smaller SMA package (DO-214AC), VWM = 26 V, VC = 42.1 V, TJ max = 150 °C | Not AEC-Q101 qualified; suitable for industrial/commercial only; limited thermal mass for repetitive surges | Select when cost and board space are prioritized over automotive qualification and 3000 W surge handling. |
| SMCJ26AHE3_A/H | Same SMC package, identical VWM/VC/PPPM specs, but HE3_A/H suffix indicates different reel packaging (7″ tape, 850 pcs) and revision code A | No functional difference; same AEC-Q101 qualification, thermal performance, and reliability testing | Select when procurement requires smaller reel quantity or legacy revision compatibility is mandated by design release. |
Compared with SMAJ26A-E3/5AT and SMCJ26AHE3_A/H, the 3KASMC26AHE3_B/I offers higher surge endurance (3000 W vs. 400 W) and extended temperature capability (185 °C vs. 150 °C), making it uniquely suited for under-hood automotive applications where both power density and thermal resilience are critical.
Availability
3KASMC26AHE3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input stage hardening, and industrial motor drive gate driver supply stabilization requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for 3KASMC26AHE3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The 3KASMC26AHE3_B/I belongs to Vishay's PAR® family of surface-mount transient voltage suppressors, engineered specifically for robust clamping in harsh-environment automotive and industrial power systems where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the 3KASMC26AHE3_B/I at its rated peak pulse current?
The 3KASMC26AHE3_B/I has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 71.3 A, measured using a 10/1000 μs waveform. This value is guaranteed per the manufacturer's electrical characteristics table and defines the upper voltage limit imposed on protected circuits during worst-case transient events. The 3KASMC26AHE3_B/I maintains this clamping performance across its full operating temperature range up to TJ = 185 °C.
Is the 3KASMC26AHE3_B/I qualified for automotive applications?
Yes, the 3KASMC26AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix HE3. It undergoes rigorous stress testing-including high-temperature reverse bias (HTRB), temperature cycling, and ESD-to meet automotive reliability standards. The 3KASMC26AHE3_B/I is explicitly designated for use in automotive systems such as ECUs, body control modules, and ADAS power supplies where long-term stability under thermal and electrical stress is required.
What package type does the 3KASMC26AHE3_B/I use, and what are its key mechanical features?
The 3KASMC26AHE3_B/I uses the SMC (DO-214AB) surface-mount package, measuring 7.75 mm × 6.22 mm with a 2.06 mm lead pitch. Its mechanical features include UL 94 V-0 compliant molding compound, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and MSL Level 1 rating for unlimited floor life. The cathode is marked by a visible color band, and the 3KASMC26AHE3_B/I is designed for reflow-compatible assembly without preconditioning.
How does the 3KASMC26AHE3_B/I differ from the SMAJ26A-E3/5AT in terms of surge capability?
The 3KASMC26AHE3_B/I delivers 3000 W peak pulse power (10/1000 μs), whereas the SMAJ26A-E3/5AT is rated for only 400 W under the same waveform. This 7.5× higher power handling enables the 3KASMC26AHE3_B/I to absorb severe load-dump and ISO 7637-2 transients without failure-making it suitable for automotive front-end protection where the SMAJ26A-E3/5AT would be thermally overloaded. Both share VWM = 26 V and VC = 42.1 V, but the 3KASMC26AHE3_B/I's SMC package provides superior thermal dissipation (RθJL = 18.3 °C/W).
What is the maximum junction temperature rating for the 3KASMC26AHE3_B/I, and why is it significant?
The 3KASMC26AHE3_B/I is rated for a maximum junction temperature (TJ max.) of +185 °C, significantly exceeding the 150 °C limit of many commercial TVS diodes. This rating enables reliable operation in under-hood automotive environments-such as near engines or inverters-where ambient temperatures exceed 125 °C. The 3KASMC26AHE3_B/I's junction passivation and thermal design ensure parameter stability and longevity even at sustained high temperatures, supporting AEC-Q101 qualification and long-term field reliability.
3KASMC26AHE3_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)
3KASMC26AHE3_B/I FAQ
1.How can I place an order for 3KASMC26AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHE3_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 3KASMC26AHE3_B/I reliable?
The price and inventory of 3KASMC26AHE3_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 3KASMC26AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHE3_B/I?
3KASMC26AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHE3_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 3KASMC26AHE3_B/I?
For technical support, including 3KASMC26AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC26AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHE3_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 3KASMC26AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHE3_B/I?
All 3KASMC26AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHE3_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 3KASMC26AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC26AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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