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Vishay General Semiconductor - Diodes Division 3KASMC26AHM3_B/H
- Part No.:
- 3KASMC26AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC26AHM3_B/H.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
3KASMC26AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 26 V stand-off voltage (VWM), 42.1 V maximum clamping voltage at 71.3 A IPPM, and 185 °C maximum junction temperature - deployed for automotive-grade ESD and surge protection on power rails and sensor signal lines.
For engineers reviewing the 3KASMC26AHM3_B/H datasheet, 3KASMC26AHM3_B/H pinout, 3KASMC26AHM3_B/H application, or 3KASMC26AHM3_B/H equivalent, key selection criteria include clamping performance under 10/1000 μs transients, AEC-Q101 qualification status, thermal resistance (RθJL = 18.3 °C/W), and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable breakdown behavior up to TJ = 185 °C, with a typical VBR of 30.4 V (min 28.9 V, max 31.9 V) at 1 mA test current. Its low incremental surge resistance and fast response time enable effective suppression of inductive switching spikes and lightning-induced surges.
The device operates exclusively in unidirectional mode, features a color-band cathode marking, and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability. It is qualified to AEC-Q101 and specified for use with minimum recommended SMC pad layout per Vishay document 88480.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum reverse voltage before clamping begins; defines safe operating window for 24 V nominal systems |
| VBR (min/typ/max) | 28.9 / 30.4 / 31.9 V at 1 mA - ensures predictable turn-on threshold across temperature and production lot |
| VC @ IPPM | 42.1 V at 71.3 A - limits downstream voltage stress during 3000 W transient events |
| PPPM | 3000 W (10/1000 μs) - supports high-energy surge immunity per ISO 7637-2 and IEC 61000-4-5 |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating |
| RθJL | 18.3 °C/W - allows direct thermal path to PCB copper for sustained power dissipation |
| Polarity | Unidirectional - protects against positive-going transients only; requires external circuit polarity alignment |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., 24 V rail or sensor output); must be routed with low-inductance trace |
| Cathode | Current exit terminal during clamping | Connected to ground reference plane; requires low-impedance return path to sustain clamping performance |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable VBR drift < ±5 % over 1000 hrs at TJ = 150 °C, critical for long-life automotive modules |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A material declarations for green manufacturing |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without pre-baking or moisture sensitivity concerns |
| Low RθJL = 18.3 °C/W | Supports >5 W continuous dissipation when mounted on ≥1 in² 2-oz copper with thermal vias |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element absorbing >3000 W transients while limiting rail voltage to ≤42.1 V. Use Value: Prevents latch-up or permanent damage to downstream DC/DC converters and microcontrollers during ISO 16750-2 tests. | Use Scenario: Shielding analog outputs of pressure or temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response shunt suppressor diverting ESD (IEC 61000-4-2) and inductive kickback from 4–20 mA loops. Use Value: Maintains signal integrity below 1 LSB error by clamping within <1 ns and holding VC ≤42.1 V at 71.3 A. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding -48 V telecom rectifier outputs from lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive transients only. Use Value: Survives repeated 10/1000 μs surges up to 3000 W without parameter shift, verified per IEC 61000-4-5 Ed. 3. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine drive circuits). IC Role / Device Role / Timing Role: Parallel-connected transient absorber across motor terminals to limit flyback voltage to safe levels. Use Value: Extends MOSFET lifetime by reducing VDS stress during commutation, validated at TJ = 150 °C for 10,000-cycle endurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26AHE3_A/H | Lower PPPM (600 W), same VWM (26 V), SMB package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for non-automotive industrial use only | Select when board space is constrained and surge energy is ≤600 W |
| SMCJ26AHE3_A/H | Same SMC package and PPPM (3000 W), but HE3 suffix (RoHS + AEC-Q101) vs. HM3 (halogen-free + RoHS + AEC-Q101) | Identical electrical specs and automotive qualification; differs only in halogen content and material compliance reporting | Select when halogen-free certification is not required and cost optimization is prioritized |
Compared with 3KASMC26AHM3_B/H, SMBJ26AHE3_A/H offers reduced surge handling in a smaller package for space-limited designs, while SMCJ26AHE3_A/H provides identical protection performance with standard RoHS compliance instead of halogen-free materials - enabling trade-offs between environmental compliance, supply chain traceability, and mechanical robustness.
Availability
3KASMC26AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor drives requiring stable component supply with full AEC-Q101 and halogen-free compliance.
Supply support for 3KASMC26AHM3_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, thermal performance, and automotive qualification.
The 3KASMCxxA family is engineered for high-temperature, high-reliability transient suppression in harsh environments - specifically targeting under-hood automotive, industrial motor control, and infrastructure power systems where 185 °C operation and 3000 W surge immunity are mandatory.
FAQ
What is the clamping voltage of the 3KASMC26AHM3_B/H under a 10/1000 μs surge?
The 3KASMC26AHM3_B/H has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 71.3 A using the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and is measured per ANSI/IEEE C62.35. The 3KASMC26AHM3_B/H maintains this clamping performance without degradation after repeated surges when operated within its thermal limits.
Is the 3KASMC26AHM3_B/H qualified for automotive applications?
Yes, the 3KASMC26AHM3_B/H is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88480, Revision 19-Jan-2024). The HM3 suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. This makes the 3KASMC26AHM3_B/H suitable for use in automotive powertrain, chassis, and ADAS modules where extended temperature operation and long-term reliability are required.
What does the "HM3" suffix mean in 3KASMC26AHM3_B/H?
The "HM3" suffix in 3KASMC26AHM3_B/H indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It distinguishes the part from HE3-suffixed variants (RoHS + AEC-Q101 but not halogen-free) and confirms compliance with JEDEC JS709E and IPC-1752A material declarations. The "B/H" denotes packaging: 7-inch tape-and-reel, 850 units per reel, with "B" indicating revision level and "H" the preferred package code.
What is the thermal resistance from junction to leads (RθJL) for the 3KASMC26AHM3_B/H?
The 3KASMC26AHM3_B/H has a typical thermal resistance from junction to leads (RθJL) of 18.3 °C/W, as specified in Vishay's datasheet (Document Number 88480). This low value enables efficient heat transfer from the silicon die to the PCB copper via the SMC (DO-214AB) package leads, supporting sustained power dissipation and reliable operation at TJ = 185 °C when used with appropriate thermal land patterns.
Can the 3KASMC26AHM3_B/H replace the 3KASMC26AHE3_B/H in an existing design?
Yes, the 3KASMC26AHM3_B/H is a direct replacement for 3KASMC26AHE3_B/H in most cases: both share identical electrical specifications (VWM = 26 V, VC = 42.1 V, PPPM = 3000 W), SMC package, AEC-Q101 qualification, and RoHS compliance. The only difference is that HM3 adds halogen-free certification. No PCB changes are required, but ensure material compliance documentation aligns with your end-product environmental requirements when substituting 3KASMC26AHM3_B/H.
3KASMC26AHM3_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 (SMCJ)
3KASMC26AHM3_B/H FAQ
1.How can I place an order for 3KASMC26AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC26AHM3_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 3KASMC26AHM3_B/H reliable?
The price and inventory of 3KASMC26AHM3_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 3KASMC26AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC26AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC26AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC26AHM3_B/H?
3KASMC26AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC26AHM3_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 3KASMC26AHM3_B/H?
For technical support, including 3KASMC26AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC26AHM3_B/H requirements.
6.How does Aetrix verify that 3KASMC26AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC26AHM3_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 3KASMC26AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC26AHM3_B/H?
All 3KASMC26AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC26AHM3_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 3KASMC26AHM3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC26AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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