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Vishay General Semiconductor - Diodes Division 3KASMC15AHE3/9AT
- Part No.:
- 3KASMC15AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHE3/9AT.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC15AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown (VBR), 3000 W peak pulse power (10/1000 μs), 24.4 V clamping voltage at 123 A IPPM, and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 3KASMC15AHE3/9AT datasheet, 3KASMC15AHE3/9AT pinout, 3KASMC15AHE3/9AT application, or 3KASMC15AHE3/9AT equivalent, this device serves as a high-reliability, high-temperature (TJ = 185 °C) surge protector for MOSFET gate drivers, sensor signal lines, and 12 V automotive power rails where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.46), and MSL Level 1 reflow compatibility are critical.
Technical Context
The 3KASMC15AHE3/9AT employs passivated anisotropic rectifier technology with optimized junction passivation, enabling stable operation up to 185 °C junction temperature and meeting AEC-Q101 stress test requirements for automotive under-hood applications. Its unidirectional polarity and DO-214AB package support high-surge-current handling without thermal runaway.
It delivers 3000 W peak pulse power per 10/1000 μs waveform with 24.4 V clamping at 123 A, incremental surge resistance of ~0.198 Ω (VC/IPPM), and reverse leakage ≤1.0 μA at 15 V (TA = 25 °C). Thermal resistance is 77.5 °C/W (junction-to-ambient) on standard PCB pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for 12 V nominal systems. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on threshold across production lot. |
| VC @ IPPM | 24.4 V - Clamping voltage measured at 123 A peak pulse; limits downstream voltage stress during ESD or load-dump transients. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| TJ max. | 185 °C - Maximum junction temperature rating; enables use in engine control units and powertrain modules without derating. |
| Polarity | Unidirectional - Protects only against positive transients on anode-to-cathode bias; requires correct orientation in series with protected line. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; compatible with standard 260 °C lead-free reflow profiles without baking. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for transient energy absorption path | Connected to protected line (e.g., 12 V rail or sensor output); conducts surge current toward ground when clamped. |
| Cathode | Reference/return terminal | Connected to system ground or low-impedance return path; color band identifies this end for correct PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage over 1000+ thermal cycles at 150 °C. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, TCT, and ESD-HBM ≥8 kV - required for ECUs and ADAS sensors. |
| 3000 W peak pulse power | Withstands 12 V system load-dump surges (ISO 7637-2 Pulse 5a) and ISO 16750-2 supply transients without degradation. |
| Low clamping ratio (VC/VBR) | 1.46 (24.4 V / 16.7 V min) - minimizes overvoltage margin needed for downstream ICs like CAN transceivers or microcontrollers. |
| MSL Level 1 | Enables direct placement into high-volume SMT lines without moisture sensitivity handling or pre-bake steps. |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (up to 60 V, 400 ms) on 12 V battery-fed power rails in body control modules. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC/DC converters and LDOs to limit input voltage excursion. Use Value: Prevents latch-up or permanent damage to PMICs and MCU power supplies while maintaining <1 ns response time. |
Use Scenario: Protecting analog sensor inputs (e.g., MAP, TPS) and digital communication lines (LIN, CAN) in engine bay ECUs exposed to ignition noise. IC Role / Device Role / Timing Role: Unidirectional shunt device placed at connector interface to divert ESD (IEC 61000-4-2 ±8 kV contact) and coupled transients. Use Value: Maintains signal integrity with <1.0 μA leakage at 15 V, ensuring minimal offset error in precision analog front-ends. |
| Industrial Motor Drive Gate Driver Protection | Telecom Power Supply Surge Suppression |
Use Scenario: Shielding high-side/low-side MOSFET gate drivers from inductive switching spikes in BLDC inverters. IC Role / Device Role / Timing Role: Fast-clamping TVS connected between gate and source to clamp Miller-induced overshoot during turn-off. Use Value: Limits gate voltage to ≤24.4 V, preventing oxide breakdown in 30 V-rated logic-level MOSFETs under repetitive 100 A surge conditions. |
Use Scenario: Safeguarding AC/DC adapter primary-side rectifiers and secondary-side DC outputs against lightning-induced surges on telecom power feeds. IC Role / Device Role / Timing Role: Secondary-side unidirectional TVS on +12 V or +48 V distribution bus to absorb IEC 61000-4-5 combination wave surges. Use Value: Delivers 3000 W pulse handling with 77.5 °C/W RθJA on standard pads - eliminates need for heatsinking in space-constrained telecom modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM (400 W), higher RθJA (110 °C/W), VBR 16.7–18.5 V identical. | Not suitable for 3000 W surge events; limited to low-energy ESD or signal-line protection. | Select only when board space is constrained and surge energy is <10% of 3KASMC15AHE3/9AT capability. |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201AE package; same VWM/VBR specs but higher VF (3.5 V vs. 2.5 V typical), no AEC-Q101 qualification. | Requires manual insertion or wave soldering; not approved for automotive production or automated SMT lines. | Use only in non-automotive industrial equipment where AEC-Q101 is not mandated and through-hole assembly is acceptable. |
Compared with SMAJ15A-E3/57T and 1.5KE15A, the 3KASMC15AHE3/9AT uniquely combines AEC-Q101 qualification, 3000 W pulse rating, DO-214AB thermal performance (RθJL = 18.3 °C/W), and MSL Level 1 - making it the only choice for high-volume automotive SMT production requiring full ISO 16750-2 compliance.
Availability
3KASMC15AHE3/9AT is available at Aetrix Electronics and suitable for automotive power management, engine control unit (ECU) design, and industrial motor drive protection requiring stable component supply, long-term lifecycle assurance, and traceable RoHS-compliant sourcing.
Supply support for 3KASMC15AHE3/9AT 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 operation, and automotive qualification.
The 3KASMC15AHE3/9AT belongs to Vishay's PAR® (Protection Against Transients) family, engineered specifically for robust transient suppression in harsh environments - including under-hood automotive, industrial automation, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the 3KASMC15AHE3/9AT at its rated peak pulse current?
The 3KASMC15AHE3/9AT has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 123 A, measured using a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 24.4 V during worst-case surge events. The 3KASMC15AHE3/9AT achieves this with a low incremental surge resistance of approximately 0.198 Ω.
Is the 3KASMC15AHE3/9AT qualified for automotive applications?
Yes, the 3KASMC15AHE3/9AT is AEC-Q101 qualified and explicitly rated for TJ = 185 °C operation, making it suitable for under-hood automotive applications such as engine control units, body control modules, and ADAS sensor interfaces. It meets all stress tests defined in AEC-Q101, including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT). The 3KASMC15AHE3/9AT also carries Vishay's HM3 suffix, confirming RoHS compliance and whisker resistance per JESD 201 Class 2.
What is the package type and mounting configuration of the 3KASMC15AHE3/9AT?
The 3KASMC15AHE3/9AT uses the DO-214AB (SMC) surface-mount package, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It features a cathode identification band and is rated MSL Level 1 per J-STD-020, allowing direct placement in lead-free reflow ovens peaking at 260 °C. The 3KASMC15AHE3/9AT requires the recommended pad layout per Vishay document 89962 - minimum 3.20 mm × 1.52 mm pads with 4.69 mm maximum width - to achieve specified thermal and surge performance.
How does the 3KASMC15AHE3/9AT compare to standard SMAJ-series TVS diodes in surge handling capability?
The 3KASMC15AHE3/9AT delivers 3000 W peak pulse power (10/1000 μs), which is 7.5× higher than the 400 W rating of the SMAJ15A-E3/57T. Its DO-214AB package provides lower thermal resistance (RθJA = 77.5 °C/W vs. 110 °C/W for SMA) and superior surge current handling (123 A vs. 32.4 A). The 3KASMC15AHE3/9AT also supports higher junction temperature (185 °C vs. 150 °C) and is AEC-Q101 qualified, whereas SMAJ15A is not. These differences make the 3KASMC15AHE3/9AT appropriate for demanding automotive and industrial surge environments where the SMAJ15AHE3/9AT would fail catastrophically.
What is the reverse leakage current specification for the 3KASMC15AHE3/9AT at its stand-off voltage?
The 3KASMC15AHE3/9AT specifies a maximum reverse leakage current (IR) of 1.0 μA at its stand-off voltage (VWM) of 15 V and ambient temperature (TA = 25 °C). At elevated temperature (TJ = 150 °C), leakage remains ≤10 μA under the same VWM condition. This low leakage ensures minimal power loss and signal distortion in always-on automotive circuits such as LIN bus receivers or sensor bias networks. The 3KASMC15AHE3/9AT maintains this performance due to its passivated junction structure and optimized anisotropic rectifier design.
3KASMC15AHE3/9AT 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):
- 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 (SMCJ)
3KASMC15AHE3/9AT FAQ
1.How can I place an order for 3KASMC15AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHE3/9AT 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 3KASMC15AHE3/9AT reliable?
The price and inventory of 3KASMC15AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHE3/9AT?
3KASMC15AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHE3/9AT 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 3KASMC15AHE3/9AT?
For technical support, including 3KASMC15AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHE3/9AT requirements.
6.How does Aetrix verify that 3KASMC15AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHE3/9AT 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 3KASMC15AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHE3/9AT?
All 3KASMC15AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHE3/9AT, 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 3KASMC15AHE3/9AT part is unused and in its original packaging.
Return procedure for 3KASMC15AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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