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Vishay General Semiconductor - Diodes Division 3KASMC26HE3_A/H
- Part No.:
- 3KASMC26HE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26HE3_A/H.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,192
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Product details
Overview
3KASMC26HE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount 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 IPPM. It operates up to 185 °C junction temperature and is AEC-Q101 qualified for automotive power line protection.
For engineers reviewing the 3KASMC26HE3_A/H datasheet, 3KASMC26HE3_A/H pinout, 3KASMC26HE3_A/H application, or 3KASMC26HE3_A/H equivalent, this device serves as a high-reliability, high-temperature TVS for inductive load switching transients on 24 V automotive power rails, sensor supply lines, and MOSFET gate drivers requiring robust surge immunity and MSL Level 1 reflow compatibility.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under thermal stress and repetitive surge events. Its unidirectional polarity enables clamping only during reverse overvoltage conditions while maintaining low forward voltage (VF = 3.5 V at 100 A) during fault conduction.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports operation across -65 °C to +185 °C junction temperature range. Thermal resistance is characterized at RθJA = 77.5 °C/W (typ.) and RθJL = 18.3 °C/W (typ.), enabling accurate power derating per Figure 6 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 42.1 V - Clamping voltage at 71.3 A peak pulse current (10/1000 μs); limits downstream voltage stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 3000 W - Peak pulse power handling capability; supports high-energy transients common in automotive load-dump and inductive kick scenarios. |
| TJ max. | +185 °C - Maximum junction temperature rating; enables use in engine bay and under-hood applications without thermal derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements including HTGB, HTRB, TCT, and ESD. |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm × 6.60 mm footprint and 3.20 mm height; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AB (SMC) package with cathode band marking on one end; two-terminal device with no internal connections beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or low-side return path; establishes reference for clamping action when cathode is at higher potential. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 24 V rail); conducts surge current to ground during overvoltage events above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure improves long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 | Rated for peak reflow temperature of 260 °C per J-STD-020; eliminates moisture sensitivity concerns and bake requirements prior to assembly. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT/burst), enhancing protection effectiveness for sensitive ICs. |
| High TJ capability | 185 °C maximum junction temperature allows direct placement near heat sources such as power converters or motor drivers. |
| Uni-directional polarity | Prevents unintended conduction during normal forward-biased operation; ideal for DC power rail protection where reverse blocking is required. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 26 V while remaining non-conductive during normal operation. Use Value: Limits peak voltage to ≤42.1 V at 71.3 A, safeguarding downstream DC-DC converters and microcontrollers rated for 36 V absolute maximum. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients (<1 ns rise time) before they reach precision amplifier inputs. Use Value: Low clamping voltage and fast response ensure signal integrity is preserved; junction capacitance <100 pF avoids bandwidth degradation at 1 MHz. |
| MOSFET Gate Driver Protection | Telecom DC Power Input Protection |
Use Scenario: Preventing gate oxide damage in high-side N-channel MOSFET drivers exposed to inductive flyback from solenoid loads. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp negative-going spikes during turn-off, limiting voltage to safe levels below ±20 V. Use Value: With VF = 3.5 V at 100 A, it sustains high-current surges without thermal runaway, supporting repeated actuation cycles in valve control systems. |
Use Scenario: Safeguarding 48 V telecom power supplies against lightning-induced surges entering via outdoor cabling (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary-level TVS on input stage to absorb multi-kW transients before they reach bulk capacitors and controller ICs. Use Value: 3000 W PPPM rating and 43.2 A IPPM at 40 V variant (3KASMC40A) confirm scalability; 3KASMC26HE3_A/H provides proportional headroom for lower-voltage telecom subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Lower PPPM (400 W), same VWM (26 V), DO-214AC (SMA) package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics but insufficient for automotive load dump energy absorption | Select 3KASMC26HE3_A/H when >1 kW surge energy must be dissipated; SMAJ26A fits tighter layouts where peak power is ≤400 W |
| SMCJ26A | Same package (DO-214AB), identical VWM and VC, but rated for 1500 W PPPM (half the energy handling of 3KASMC26HE3_A/H) | Valid for industrial I/O protection but not AEC-Q101 qualified; lacks automotive qualification and 185 °C TJ rating | Choose 3KASMC26HE3_A/H for AEC-Q101-compliant designs requiring full 3000 W capability; SMCJ26A offers cost advantage where qualification and energy margin are not critical |
Compared with SMAJ26A and SMCJ26A, the 3KASMC26HE3_A/H delivers double the peak pulse power of SMCJ26A and nearly eight times that of SMAJ26A within the same SMC footprint, while adding AEC-Q101 qualification and extended 185 °C operation-making it uniquely suited for under-hood automotive modules demanding both high energy absorption and long-term thermal reliability.
Availability
3KASMC26HE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution units, industrial PLC I/O modules, and telecom DC-DC front-end protection requiring stable component supply, AEC-Q101 compliance, and high-temperature operational assurance.
Supply support for 3KASMC26HE3_A/H 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 3KASMC series was developed specifically for automotive and industrial environments requiring high-energy transient suppression, extended temperature operation, and AEC-Q101 validation-targeting power rail, sensor, and actuator interface protection.
FAQ
What is the clamping voltage of the 3KASMC26HE3_A/H at its rated peak pulse current?
The 3KASMC26HE3_A/H 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 ensures protected circuits remain within safe voltage limits during standardized surge events like ISO 7637-2 Pulse 5a. The 3KASMC26HE3_A/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC26HE3_A/H suitable for automotive applications?
Yes, the 3KASMC26HE3_A/H is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications including body control modules, power distribution units, and engine management systems. Its DO-214AB package meets MSL Level 1 reflow requirements, and the 3KASMC26HE3_A/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What does the "_A/H" suffix indicate in 3KASMC26HE3_A/H?
The "_A/H" suffix in 3KASMC26HE3_A/H denotes the packaging configuration: "H" specifies 7-inch diameter plastic tape and reel with 850 units per reel, while "A" indicates the base P/NHM3 revision level compliant with RoHS and AEC-Q101. This ordering code aligns with Vishay's documented format in the "Ordering Information" section of document 89962.
How does the thermal performance of the 3KASMC26HE3_A/H compare to standard SMC TVS diodes?
The 3KASMC26HE3_A/H features a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, significantly lower than many legacy SMC TVS devices, enabling more efficient heat transfer to PCB copper. Its RθJA of 77.5 °C/W (on minimum recommended pad layout) supports reliable operation at elevated ambient temperatures-critical for the 3KASMC26HE3_A/H's use in thermally demanding automotive and industrial settings.
Can the 3KASMC26HE3_A/H replace the 3KASMC26A in existing designs?
Yes, the 3KASMC26HE3_A/H is a drop-in replacement for 3KASMC26A, sharing identical electrical specifications, DO-214AB package dimensions, pinout, and thermal characteristics. The "HE3_A/H" suffix reflects updated packaging and revision coding per Vishay's HM3 platform, with no functional or performance differences from the base 3KASMC26A variant.
3KASMC26HE3_A/H 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/H FAQ
1.How can I place an order for 3KASMC26HE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26HE3_A/H 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/H reliable?
The price and inventory of 3KASMC26HE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for 3KASMC26HE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26HE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26HE3_A/H?
3KASMC26HE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26HE3_A/H 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/H?
For technical support, including 3KASMC26HE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26HE3_A/H requirements.
6.How does Aetrix verify that 3KASMC26HE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC26HE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of 3KASMC26HE3_A/H?
All 3KASMC26HE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26HE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for 3KASMC26HE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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