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Vishay General Semiconductor - Diodes Division 3KASMC26AHE3_A/H
- Part No.:
- 3KASMC26AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHE3_A/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,669
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Product details
Overview
3KASMC26AHE3_A/H 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, 3000 W peak pulse power (10/1000 μs), 71.3 A peak surge current, and 42.1 V clamping voltage at IPPM - deployed for automotive power line and sensor interface protection.
For engineers reviewing the 3KASMC26AHE3_A/H datasheet, 3KASMC26AHE3_A/H pinout, 3KASMC26AHE3_A/H application, or 3KASMC26AHE3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 77.5 °C/W), junction temperature capability up to +185 °C, and DO-214AB mechanical dimensions for layout and reliability validation.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 10/1000 μs waveform response enable precise clamping during inductive switching transients in automotive ECUs and industrial motor drives.
The device operates across –65 °C to +185 °C junction temperature range, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and achieves 3000 W peak pulse power dissipation with <3.5 V forward voltage at 100 A - critical for minimizing voltage overshoot during fast-rising surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below breakdown. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - guaranteed breakdown threshold ensures predictable clamping onset under surge conditions. |
| PPPM | 3000 W (10/1000 μs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 1 & 2a in 12 V automotive systems. |
| IPPM | 71.3 A - peak surge current capability directly supports 200 A IFSM (8.3 ms half-sine) without degradation. |
| VC | 42.1 V at IPPM - clamping voltage limits downstream IC stress; ratio VC/VWM = 1.62 indicates efficient suppression. |
| TJ max. | +185 °C - enables operation in engine bay or under-hood environments where ambient exceeds 125 °C. |
| RθJA | 77.5 °C/W - thermal resistance informs PCB pad design and heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode indicated by color band. Meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference. | Defines conduction path during positive transients when used in unidirectional configuration. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., CAN_H, LIN, battery rail). | Color band identifies cathode; determines orientation on PCB for correct clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 185 °C junction rating | Supports placement near heat sources (e.g., power MOSFETs, DC-DC converters) without derating penalties. |
| Low Rsurge (incremental surge resistance) | Minimizes VC rise under high di/dt events, improving clamping precision for sensitive microcontrollers. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated assembly at 260 °C peak profile. |
| Uni-directional polarity only | Simplifies layout and eliminates ambiguity in polarity assignment for DC-biased lines like power rails and sensor supplies. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp overvoltage before LDO or MCU damage. Use Value: Withstands 3000 W pulses and operates up to +185 °C, enabling direct placement on high-temp engine compartment PCBs. |
Use Scenario: Protecting analog front-end inputs of pressure, temperature, or position sensors exposed to EMI and cable discharge events. IC Role / Device Role / Timing Role: Fast-response TVS shunting induced surges on sensor signal lines (e.g., 0–5 V ratiometric outputs) before ADC input stages. Use Value: 42.1 V clamping voltage and 77.5 °C/W thermal resistance ensure signal integrity and long-term reliability in noisy factory environments. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
Use Scenario: Guarding PoE-powered equipment inputs against lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream MOVs and fuses. Use Value: 3000 W rating and 71.3 A IPPM meet IEC 61000-4-5 Level 4 requirements for telecom infrastructure. |
Use Scenario: Safeguarding gate drivers and MCU I/O pins in washing machine or HVAC inverter boards subjected to motor commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on half-bridge driver supply rails and feedback signal paths to prevent latch-up or reset faults. Use Value: Passivated anisotropic rectifier structure ensures stable leakage (<1 μA at 26 V) and no parameter drift after repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Same VWM (26 V), lower PPPM (400 W), higher VC (42.8 V), DO-214AC (SMA) package. | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation. | Select 3KASMC26AHE3_A/H when >1000 W surge handling and AEC-Q101 compliance are mandatory. |
| SMCJ26A | Same DO-214AB package and PPPM (3000 W), but VBR min/max = 28.9–32.1 V and VC = 42.1 V - nearly identical clamping performance. | Also AEC-Q101 qualified; differs only in marking code and minor process revision (HM3 vs. HM3_X). | 3KASMC26AHE3_A/H offers documented TJ = 185 °C capability and tighter VBR tolerance (±5.2% vs. ±5.5%), preferred for high-reliability automotive designs. |
Compared with SMAJ26A and SMCJ26A, the 3KASMC26AHE3_A/H provides superior thermal robustness (TJ = 185 °C), tighter breakdown tolerance, and explicit qualification for extended high-temperature operation - making it the optimal choice for under-hood automotive modules requiring zero derating at 150 °C ambient.
Availability
3KASMC26AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply, AEC-Q101 compliance, and high-temperature operational continuity.
Supply support for 3KASMC26AHE3_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, high-temperature performance, and automotive qualification.
The 3KASMC series was engineered specifically for harsh-environment transient suppression - targeting AEC-Q101 compliance, 185 °C junction operation, and 3000 W surge resilience in next-generation automotive and industrial power systems.
FAQ
What is the exact breakdown voltage range for 3KASMC26AHE3_A/H at 1 mA test current?
The 3KASMC26AHE3_A/H has a guaranteed breakdown voltage range of 28.9 V to 31.9 V when tested at IT = 1 mA, per Vishay Document Number 89962, page 2. This specification ensures consistent clamping behavior across production lots and supports design margining for 26 V nominal systems.
Is 3KASMC26AHE3_A/H qualified to AEC-Q101, and what does that cover?
Yes, the 3KASMC26AHE3_A/H is explicitly AEC-Q101 qualified, as stated in the "MECHANICAL DATA" section of its datasheet. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge (ESD), validating suitability for automotive electronic modules.
What is the clamping voltage of 3KASMC26AHE3_A/H at its rated peak pulse current?
The 3KASMC26AHE3_A/H clamps to a maximum of 42.1 V at its rated peak pulse current (IPPM) of 71.3 A, measured with a 10/1000 μs waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table and defines the upper voltage limit imposed on protected circuits during surge events.
Does 3KASMC26AHE3_A/H support lead-free reflow soldering, and what is its MSL rating?
Yes, the 3KASMC26AHE3_A/H is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. Its matte tin-plated leads are fully compatible with lead-free soldering processes, and no pre-baking is required prior to assembly.
What package type and dimensions does 3KASMC26AHE3_A/H use, and how is polarity marked?
The 3KASMC26AHE3_A/H uses the DO-214AB (SMC) package, with overall dimensions of 7.11 mm × 6.22 mm × 2.90 mm. Polarity is marked by a cathode band on the body; the banded end corresponds to the cathode terminal, which must be connected toward the line being protected.
3KASMC26AHE3_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:
- 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/H FAQ
1.How can I place an order for 3KASMC26AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHE3_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 3KASMC26AHE3_A/H reliable?
The price and inventory of 3KASMC26AHE3_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 3KASMC26AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHE3_A/H?
3KASMC26AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHE3_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 3KASMC26AHE3_A/H?
For technical support, including 3KASMC26AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC26AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHE3_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 3KASMC26AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHE3_A/H?
All 3KASMC26AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHE3_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 3KASMC26AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC26AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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