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Vishay General Semiconductor - Diodes Division 3KASMC15AHM3_A/I
- Part No.:
- 3KASMC15AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHM3_A/I.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,078
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Product details
Overview
3KASMC15AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for high-reliability overvoltage protection in automotive and industrial power rails. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 24.4 V under 123 A surge current, and operates up to 185 °C junction temperature - enabling robust protection of MOSFETs and ICs against inductive switching transients.
For engineers reviewing the 3KASMC15AHM3_A/I datasheet, 3KASMC15AHM3_A/I pinout, 3KASMC15AHM3_A/I application, or 3KASMC15AHM3_A/I equivalent, this page provides verified electrical parameters, DO-214AB package details, AEC-Q101 qualification status, thermal resistance data, and real-world use cases in automotive sensor signal lines and DC bus protection.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity and 15 V stand-off voltage (VWM) make it suitable for DC-biased rail protection where reverse conduction must be blocked until breakdown.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow capability and achieves 185 °C maximum junction temperature - confirming suitability for under-hood automotive environments and industrial motor drives where thermal derating is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - blocks normal operating voltage while remaining non-conductive until transient exceeds threshold |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - defines precise avalanche initiation range for predictable clamping onset |
| VC (Clamping Voltage) | 24.4 V at 123 A (10/1000 μs) - limits peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 3000 W - sustains high-energy transients without failure, e.g., ISO 7637-2 Load Dump pulses |
| TJ max | 185 °C - enables operation in high-ambient environments such as engine control units and power inverters |
| RθJA | 77.5 °C/W - informs thermal design margin when mounted on standard PCB pad layout per datasheet |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: DO-214AB (SMC) - surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line (e.g., ground or return path) |
| Cathode | Current exit terminal during forward conduction; marked with color band | Connected to higher-potential side (e.g., +12 V rail); conducts only when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable leakage and clamping performance across temperature and lifetime |
| High-temperature operation | Rated for continuous operation up to TJ = 185 °C - eliminates derating concerns in sealed enclosures or near heat sources |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without preconditioning or baking |
| Uni-directional polarity | Prevents unintended conduction in DC-biased applications where reverse blocking is required |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Protection | Industrial Motor Drive DC Bus Clamping |
|---|---|
Use Scenario: Protects microcontroller power inputs and gate drivers from load dump and alternator ripple transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp surges before they reach sensitive logic. Use Value: Withstands 3000 W peak pulses and maintains <25 V clamping at 123 A - preventing brownout or latch-up in ASIL-B subsystems. |
Use Scenario: Installed across DC link capacitors in variable-frequency drives to suppress IGBT switching-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response transient suppressor that activates within nanoseconds to limit dv/dt stress on electrolytic capacitors and IGBT modules. Use Value: 185 °C max junction temperature allows direct mounting near heatsinks without thermal isolation, reducing system footprint. |
| Automotive Sensor Signal Line Protection | Telecom Power Supply Input Stage |
Use Scenario: Shields LIN/CAN transceiver I/O pins and analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed in series with signal line to absorb ±8 kV contact ESD per IEC 61000-4-2 without distorting signal integrity. Use Value: Meets AEC-Q101 requirements and exhibits <1 μA leakage at 15 V - preserving accuracy of millivolt-level sensor signals. |
Use Scenario: Used at AC/DC front-end and secondary-side outputs of telecom rectifiers to suppress lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V distribution bus feeding base station RF modules and backhaul interfaces. Use Value: 3000 W rating handles 10/1000 μs waveform surges up to 4 kV, ensuring uptime in outdoor cabinet installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/57T (Vishay) | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 16.7–18.5 V; RθJA = 110 °C/W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a/b load dump | Select when space constraints require smaller SMA footprint and surge energy is ≤400 W |
| 1.5KE15CA (ON Semiconductor) | Through-hole DO-201 package; bidirectional; same VWM/VBR; PPPM 1500 W; TJ max = 175 °C | Requires PCB through-hole mounting; bidirectional conduction may interfere with DC-biased circuits | Choose for legacy through-hole designs where bidirectional clamping is acceptable and thermal budget allows |
Compared with SMAJ15A-E3/57T and 1.5KE15CA, the 3KASMC15AHM3_A/I offers 7.5× higher peak pulse power in a surface-mount package with superior thermal capability (185 °C vs. 175 °C) and AEC-Q101 validation - making it the preferred choice for next-generation automotive and industrial surge protection where reliability and energy handling are critical.
Availability
3KASMC15AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial motor drive DC buses, automotive sensor signal lines, and telecom power supply inputs requiring stable component supply and full AEC-Q101 compliance.
Supply support for 3KASMC15AHM3_A/I 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, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 3KASMC series was developed specifically for high-energy transient suppression in harsh-environment applications - combining PAR® technology, AEC-Q101 validation, and DO-214AB packaging to meet stringent automotive and industrial surge immunity standards.
FAQ
What is the clamping voltage of the 3KASMC15AHM3_A/I at its rated peak pulse current?
The 3KASMC15AHM3_A/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 123 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 89962) and reflects the actual voltage imposed on the protected circuit during worst-case surge conditions. The 3KASMC15AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC15AHM3_A/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the 3KASMC15AHM3_A/I is explicitly AEC-Q101 qualified as stated in the Vishay datasheet (Revision: 05-Mar-13, Document Number: 89962). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD verification. The 3KASMC15AHM3_A/I is approved for use in automotive powertrain, body electronics, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.
What does the "HM3_A/I" suffix indicate in the 3KASMC15AHM3_A/I part number?
The "HM3" denotes the RoHS-compliant, AEC-Q101-qualified DO-214AB (SMC) package variant. The "_A/I" suffix specifies the tape-and-reel packaging format: "I" indicates 3500 units per 13-inch diameter reel, with "A" denoting revision level A of the HM3 base package. This matches the ordering information table in the Vishay datasheet, where 3KASMC15AHM3_A/I is listed with unit weight 0.211 g and delivery mode "13\" diameter plastic tape and reel".
How does the thermal resistance of the 3KASMC15AHM3_A/I affect PCB layout decisions?
The 3KASMC15AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per the Vishay datasheet. This value assumes standard copper area and no thermal vias. To maintain safe junction temperatures under sustained power dissipation, designers must allocate adequate copper pour and consider thermal vias beneath the cathode/anode pads - especially since the 3KASMC15AHM3_A/I supports continuous operation up to 185 °C.
Can the 3KASMC15AHM3_A/I replace older TVS diodes like P6KE15A in existing designs?
No, the 3KASMC15AHM3_A/I is not a drop-in replacement for P6KE15A due to fundamental differences: P6KE15A is a through-hole DO-15 device with 600 W PPPM and 175 °C TJ max, while the 3KASMC15AHM3_A/I is a surface-mount DO-214AB device with 3000 W PPPM and 185 °C TJ max. Layout, thermal management, and surge handling capability differ significantly. Migration to 3KASMC15AHM3_A/I requires PCB redesign but delivers substantial reliability and performance gains.
3KASMC15AHM3_A/I 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:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
3KASMC15AHM3_A/I FAQ
1.How can I place an order for 3KASMC15AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHM3_A/I 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_A/I reliable?
The price and inventory of 3KASMC15AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHM3_A/I?
3KASMC15AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHM3_A/I 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_A/I?
For technical support, including 3KASMC15AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHM3_A/I requirements.
6.How does Aetrix verify that 3KASMC15AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHM3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHM3_A/I?
All 3KASMC15AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHM3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for 3KASMC15AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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