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Vishay General Semiconductor - Diodes Division 3KASMC15AHM3_B/H
- Part No.:
- 3KASMC15AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHM3_B/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,283
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Product details
Overview
3KASMC15AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMC (DO-214AB) package, rated for 15 V stand-off voltage (VWM), 17.6 V nominal breakdown (VBR), 3000 W peak pulse power (10/1000 μs), and 185 °C maximum junction temperature - designed for automotive-grade overvoltage protection of MOSFETs and sensor signal lines.
For engineers reviewing the 3KASMC15AHM3_B/H datasheet, 3KASMC15AHM3_B/H pinout, 3KASMC15AHM3_B/H application, or 3KASMC15AHM3_B/H equivalent, this page delivers verified electrical specs, thermal derating behavior, AEC-Q101 qualification status, clamping performance at 123 A IPPM, and halogen-free RoHS-compliant sourcing details.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress, with low incremental surge resistance enabling consistent voltage limiting during fast transients. Its TJ = 185 °C rating supports operation in under-hood automotive environments without thermal derating penalties up to 125 °C ambient.
The device exhibits 0.080 %/°C temperature coefficient of VBR and 24.4 V maximum clamping voltage at 123 A IPPM, ensuring predictable overvoltage suppression across temperature. It meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing due to matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V automotive systems. |
| VBR (nom) | 17.6 V - Breakdown voltage at 1 mA test current; ensures reliable turn-on before downstream IC damage thresholds. |
| VC @ IPPM | 24.4 V - Clamping voltage at 123 A peak pulse current; limits transient energy delivered to protected circuitry. |
| PPPM | 3000 W - Peak pulse power handling with 10/1000 μs waveform; sustains high-energy load dump or inductive switch-off events. |
| TJ max. | 185 °C - Maximum junction temperature; enables use in high-temperature engine control units without derating. |
| Polarity | Unidirectional - Provides reverse-biased clamping only; suited for DC-biased signal or power rail protection. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead span; compatible with automated assembly. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; 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's lower-potential side (e.g., ground-referenced signal or return path). |
| Cathode | Current exit terminal during clamping | Connected to protected line's higher-potential side (e.g., 12 V rail or sensor supply); marked by band. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT; suffix HM3 denotes halogen-free compliance. |
| MSL Level 1 | Zero floor life limitation; can be stored indefinitely at ≤30 °C/60 % RH without baking prior to reflow. |
| Low RSURGE | Minimizes voltage overshoot during fast-rising transients (<1 ns response time implied by construction); critical for protecting high-speed interfaces. |
| Junction passivation | Reduces leakage drift and improves long-term reliability under thermal cycling and humidity exposure. |
| 185 °C TJ capability | Enables placement near heat sources (e.g., power modules) without thermal shutdown or parameter shift. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and CAN transceiver power rails from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 12 V supply and ground, absorbing >3000 W surges within microseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V logic circuits by limiting clamped voltage to 24.4 V at 123 A. |
Use Scenario: Safeguarding gate drivers and bootstrap FETs against shoot-through-induced voltage spikes in three-phase inverters. IC Role / Device Role / Timing Role: Mounted directly across gate-source terminals to clamp Miller-induced overshoot during high dV/dt switching. Use Value: Maintains gate oxide integrity by suppressing transients to <25 V while supporting 185 °C ambient operation near heatsinks. |
| Automotive Sensor Signal Line Protection | Telecom Power Supply Input Stage |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in ADAS camera modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal pair (e.g., LIN bus), grounded via shortest possible trace. Use Value: Delivers sub-1 ns response and <1 μA leakage at 15 V, preserving signal fidelity while meeting ISO 10605 ESD immunity. |
Use Scenario: Front-end surge suppression on 48 V telecom rectifier inputs exposed to lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Primary clamping device in series with MOV-based secondary protection, handling initial 10/1000 μs energy burst. Use Value: Withstands 200 A IFSM and 3000 W PPPM, reducing MOV stress and extending system-level surge lifetime beyond 100k operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3_A/H | Same VWM (15 V), lower PPPM (400 W), smaller SMA package (DO-214AC), no AEC-Q101 qualification | Limited to consumer/industrial boards where space constraints outweigh automotive reliability needs | Select when board area is critical and surge energy remains below 400 W; not suitable for automotive under-hood use. |
| SMCJ15AHE3_A/H | Same VWM (15 V), identical SMC package, 1500 W PPPM (50 % lower), same AEC-Q101 qualification, non-halogen-free | Acceptable for cost-sensitive automotive modules where full 3000 W headroom is unnecessary | Choose when thermal budget allows lower clamping energy and halogen-free material is not mandated by OEM spec. |
Compared with 3KASMC15AHM3_B/H, SMAJ15AHE3_A/H trades surge capacity and qualification for compactness, while SMCJ15AHE3_A/H retains mechanical compatibility but reduces peak power handling by half - both require reassessment of clamping margin and thermal design in high-energy environments.
Availability
3KASMC15AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECU designs, industrial motor drives, ADAS sensor interfaces, and telecom power supplies requiring stable component supply with halogen-free, AEC-Q101-qualified transient protection.
Supply support for 3KASMC15AHM3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 3KASMCxxA family was engineered specifically for AEC-Q101-compliant transient suppression in harsh-temperature automotive subsystems, emphasizing thermal stability, surge robustness, and halogen-free compliance for modern vehicle platforms.
FAQ
What is the clamping voltage of the 3KASMC15AHM3_B/H at its rated peak pulse current?
The 3KASMC15AHM3_B/H has a maximum clamping voltage (VC) of 24.4 V at 123 A peak pulse current (IPPM), measured using a 10/1000 μs waveform. This value ensures protected circuits remain below critical voltage thresholds during high-energy transients. The 3KASMC15AHM3_B/H maintains this clamping performance across its full operating temperature range, supported by its 0.080 %/°C VBR temperature coefficient.
Is the 3KASMC15AHM3_B/H qualified for automotive applications?
Yes, the 3KASMC15AHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction. It meets JESD 201 Class 2 whisker testing and MSL Level 1 per J-STD-020, making it suitable for under-hood automotive modules. The 3KASMC15AHM3_B/H is explicitly listed in Vishay's AEC-Q101 qualified product table for the 3KASMCxxA series.
What does the "HM3" suffix mean in 3KASMC15AHM3_B/H?
The "HM3" suffix in 3KASMC15AHM3_B/H identifies the part as halogen-free, RoHS-compliant, and AEC-Q101 qualified. It distinguishes this variant from HE3-suffixed parts (RoHS-compliant and AEC-Q101 qualified but not halogen-free). The "B/H" denotes packaging: 7-inch tape-and-reel with 850 units per reel. The 3KASMC15AHM3_B/H uses matte tin-plated leads and meets J-STD-002 solderability standards.
How does the thermal resistance of the 3KASMC15AHM3_B/H affect PCB layout?
The 3KASMC15AHM3_B/H has a typical junction-to-lead thermal resistance (RθJL) of 18.3 °C/W, meaning efficient heat transfer relies on adequate copper pour connected to both leads. Layout must follow Vishay's recommended pad dimensions (min. 3.20 mm × 1.52 mm per pad) to maintain thermal performance and avoid exceeding 185 °C junction temperature. The 3KASMC15AHM3_B/H benefits from symmetric thermal vias under each pad for high-power applications.
Can the 3KASMC15AHM3_B/H replace older SMAJ15A devices in existing designs?
No - the 3KASMC15AHM3_B/H is not a drop-in replacement for SMAJ15A due to different package (SMC vs. SMA), higher power rating (3000 W vs. 400 W), and distinct thermal characteristics. While both share 15 V VWM, the 3KASMC15AHM3_B/H requires larger PCB pads and different reflow profiles. Redesign validation is required before substituting the 3KASMC15AHM3_B/H into legacy SMA footprints.
3KASMC15AHM3_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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 123A
- 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)
3KASMC15AHM3_B/H FAQ
1.How can I place an order for 3KASMC15AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHM3_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 3KASMC15AHM3_B/H reliable?
The price and inventory of 3KASMC15AHM3_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 3KASMC15AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHM3_B/H?
3KASMC15AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHM3_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 3KASMC15AHM3_B/H?
For technical support, including 3KASMC15AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHM3_B/H requirements.
6.How does Aetrix verify that 3KASMC15AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHM3_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 3KASMC15AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHM3_B/H?
All 3KASMC15AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHM3_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 3KASMC15AHM3_B/H part is unused and in its original packaging.
Return procedure for 3KASMC15AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3KASMC15AHM3_B/H Tags
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