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Vishay General Semiconductor - Diodes Division 3KASMC26AHE3_B/H
- Part No.:
- 3KASMC26AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHE3_B/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,126
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Product details
Overview
3KASMC26AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 26 V stand-off voltage (VWM), 30.4 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - deployed for automotive power rail and sensor line protection against inductive switching transients.
For engineers reviewing the 3KASMC26AHE3_B/H datasheet, 3KASMC26AHE3_B/H pinout, 3KASMC26AHE3_B/H application, or 3KASMC26AHE3_B/H equivalent, key selection criteria include clamping voltage at rated surge current, thermal resistance (RθJA = 77.5 °C/W), AEC-Q101 qualification status, unidirectional polarity, and SMC package compatibility with high-reliability PCB layouts.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge stress, with junction temperature capability up to 185 °C - enabling operation in under-hood automotive environments. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients induced by load dump or relay bounce.
The device is optimized for unidirectional operation only, with cathode marked by a band on the SMC body. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, supporting lead-free reflow at 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (nom) | 30.4 V at 1.0 mA - precise breakdown threshold for predictable turn-on behavior |
| VC @ IPPM | 42.1 V at 71.3 A - clamping voltage during 3000 W surge, limiting downstream voltage stress |
| PPPM | 3000 W (10/1000 μs) - robust energy absorption for automotive load-dump and ISO 7637-2 pulse 5a compliance |
| TJ max | +185 °C - enables placement near hot components (e.g., power MOSFETs, ECUs) without derating |
| RθJA | 77.5 °C/W - defines thermal rise under steady-state power dissipation (PD = 6.0 W) |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct orientation in circuit |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to protected line (e.g., 24 V rail); must be routed with low-inductance trace |
| Cathode | Current exit point during clamping; marked by band | Connected to ground or lower-potential reference; determines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stable leakage (<1.0 μA at VWM) and consistent VBR over lifetime and temperature |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns (peak 260 °C) |
| Low clamping ratio (VC/VBR) | 1.39 - tight voltage margin between breakdown and clamping, minimizing overvoltage exposure |
| High IFSM (200 A) | Withstands 8.3 ms half-sine surge events common in alternator load dump scenarios |
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 motor drivers. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly across input rails, shunting surge current to ground before it reaches downstream regulators or microcontrollers. Use Value: Limits rail voltage to ≤42.1 V during 71.3 A surges, preventing damage to 36 V-rated DC-DC converters and CAN transceivers. | Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from ESD and inductive coupling. IC Role / Device Role / Timing Role: Unidirectional TVS placed at connector interface to absorb fast-rising transients before they couple into signal conditioning amplifiers. Use Value: Clamps 3000 W surges within nanoseconds while maintaining <1.0 μA leakage at 26 V, preserving signal integrity and ADC accuracy. |
| Automotive Lighting Control | Telecom Power Supply Input |
Use Scenario: Safeguarding LED driver ICs and MOSFET switches in headlamp modules subjected to relay coil flyback and PWM switching noise. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to power FETs to clamp inductive kickback before it propagates through gate drive paths. Use Value: Withstands 200 A 8.3 ms surge (IFSM), ensuring survival during repeated lamp-on/off cycles in harsh thermal environments (TJ up to 185 °C). | Use Scenario: Input-stage transient suppression on 24–48 V telecom rectifier boards exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-line defense on primary DC input, absorbing energy before upstream fuses or secondary TVS arrays activate. Use Value: Delivers 3000 W peak power handling with RθJL = 18.3 °C/W, enabling efficient heat transfer to copper pour and reducing thermal runaway risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHE3_A/H | Lower PPPM (600 W), same VWM/VBR, SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer or industrial boards where surge energy is lower | Select when board area is critical and peak surge energy does not exceed 600 W |
| SMCJ26AHE3_A/H | Same PPPM (3000 W), identical VWM/VBR, but larger SMC package with identical pinout and thermal performance | Drop-in replacement with identical electrical specs and layout compatibility | Choose for legacy designs using SMCJ series or where enhanced mechanical robustness is required |
Compared with SMBJ26AHE3_A/H and SMCJ26AHE3_A/H, the 3KASMC26AHE3_B/H offers identical clamping performance and AEC-Q101 qualification in the same SMC footprint, but with tighter VBR tolerance (±3.3% vs ±5%) and improved thermal stability up to 185 °C - making it preferred for next-generation automotive modules requiring extended temperature margin.
Availability
3KASMC26AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom power supply input stages requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for 3KASMC26AHE3_B/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, precision, and automotive-grade qualification.
The 3KASMCxxA family is engineered specifically for high-energy transient suppression in demanding automotive and industrial environments, combining AEC-Q101 qualification, 185 °C operation, and PAR® technology for stable clamping under thermal stress.
FAQ
What is the clamping voltage of the 3KASMC26AHE3_B/H at its rated peak pulse current?
The 3KASMC26AHE3_B/H has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 71.3 A, measured with a 10/1000 μs waveform. This value ensures that downstream components see no more than 42.1 V during a full 3000 W transient event, providing predictable overvoltage protection for 36 V-rated ICs and power stages. The 3KASMC26AHE3_B/H maintains this clamping performance across its full operating temperature range.
Is the 3KASMC26AHE3_B/H qualified for automotive applications?
Yes, the 3KASMC26AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. It is designed for use in automotive subsystems including engine control units, body electronics, lighting modules, and ADAS sensor interfaces where reliability under thermal and electrical stress is mandatory. The 3KASMC26AHE3_B/H operates up to 185 °C junction temperature, meeting under-hood environmental requirements.
What package type does the 3KASMC26AHE3_B/H use, and what are its mounting requirements?
The 3KASMC26AHE3_B/H uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. It requires the minimum recommended pad layout specified in the Vishay datasheet (Document Number 88480) to achieve rated thermal performance (RθJA = 77.5 °C/W). The cathode is marked by a band, and the device must be oriented correctly to ensure unidirectional clamping. The 3KASMC26AHE3_B/H is MSL Level 1 and supports peak reflow temperatures up to 260 °C.
How does the 3KASMC26AHE3_B/H differ from the standard SMCJ26AHE3_A/H?
The 3KASMC26AHE3_B/H and SMCJ26AHE3_A/H share identical electrical specifications (VWM = 26 V, VBR = 30.4 V, PPPM = 3000 W, VC = 42.1 V) and SMC package, but the 3KASMC26AHE3_B/H features tighter VBR tolerance (±3.3% vs ±5%), improved thermal coefficient (αT = 0.088 %/°C), and is explicitly optimized for high-temperature stability up to 185 °C. Both are AEC-Q101 qualified, but the 3KASMC26AHE3_B/H reflects Vishay's latest PAR® process enhancements for automotive-grade consistency. The 3KASMC26AHE3_B/H is a direct functional and mechanical replacement.
What is the maximum reverse leakage current of the 3KASMC26AHE3_B/H at its stand-off voltage?
The 3KASMC26AHE3_B/H exhibits 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 temperature (TJ = 150 °C), leakage remains ≤5.0 μA - confirming stable junction passivation and suitability for low-power sensor circuits where standby current budget is critical. This low leakage is maintained across the full VWM range and contributes to minimal system power loss in always-on automotive modules. The 3KASMC26AHE3_B/H achieves this performance via optimized anisotropic rectifier technology.
3KASMC26AHE3_B/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:
- 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/H FAQ
1.How can I place an order for 3KASMC26AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHE3_B/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_B/H reliable?
The price and inventory of 3KASMC26AHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHE3_B/H?
3KASMC26AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHE3_B/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_B/H?
For technical support, including 3KASMC26AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHE3_B/H requirements.
6.How does Aetrix verify that 3KASMC26AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHE3_B/H?
All 3KASMC26AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for 3KASMC26AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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