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Vishay General Semiconductor - Diodes Division 3KASMC15AHE3_A/H
- Part No.:
- 3KASMC15AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHE3_A/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,348
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Product details
Overview
3KASMC15AHE3_A/H 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 surge current, and qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the 3KASMC15AHE3_A/H datasheet, 3KASMC15AHE3_A/H pinout, 3KASMC15AHE3_A/H application, or 3KASMC15AHE3_A/H equivalent, this device serves as a high-reliability, high-temperature (TJ = 185 °C) clamping solution for inductive switching transients on power rails and signal lines in automotive ECUs, industrial sensors, and telecom interface circuits.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under thermal stress, enabling operation up to +185 °C junction temperature - critical for under-hood automotive environments. Its unidirectional polarity and low incremental surge resistance ensure fast, repeatable clamping response during repetitive 10/1000 μs transients.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and is RoHS-compliant with HM3 suffix indicating AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 24.4 V at 123 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; enables robust MOSFET/IC survival. |
| PPPM (Peak Pulse Power) | 3000 W - Sustains high-energy transients like ISO 7637-2 Pulse 1/2a without degradation. |
| TJ max | +185 °C - Enables deployment in high-ambient zones such as engine control modules without derating penalties. |
| Polarity | Unidirectional - Protects against positive-going transients only; requires correct cathode orientation toward protected line. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.06 mm lead spacing for automated assembly. |
Pinout & Package
DO-214AB (SMC) package with two terminals: anode and cathode. Cathode identified by color band. Mounting uses standard SMC pad layout per Vishay specification (0.126″ min. pad width, 0.185″ max. length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current; must be routed with low-inductance connection to minimize clamping overshoot. |
| Cathode | Protected line connection point; marked by color band; reverse-biased during normal operation. | Connected directly to the line being protected (e.g., 12 V rail or CAN_H); determines clamping polarity and directionality. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive-grade production use, including temperature cycling, humidity bias, and mechanical shock testing. |
| Junction passivation design | Reduces leakage drift and parameter shift over time and temperature, supporting >15-year field life in harsh environments. |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without popcorn cracking or delamination - eliminates pre-bake requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive ICs. |
| 185 °C TJ capability | Eliminates thermal derating in under-hood applications up to +125 °C ambient, preserving full 3000 W pulse rating. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protection of 12 V power input and LIN bus lines against load dump and inductive kickback from solenoids/fuel injectors. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and ground, triggered within <1 ns to limit voltage to ≤24.4 V. Use Value: Prevents latch-up or gate oxide damage in microcontrollers and driver ICs exposed to ISO 16750-2 load dump pulses. |
Use Scenario: Shielding analog output lines (4–20 mA) and digital I/O (RS-485) of pressure/temperature sensors from ESD and switching noise in factory automation. IC Role / Device Role / Timing Role: Standoff-mode protector on signal lines, conducting only during transients >15 V while remaining high-impedance during normal operation. Use Value: Maintains signal integrity below 1 μA leakage at 15 V, avoiding offset errors in precision current-loop interfaces. |
| Telecom Base Station Power Interface | Consumer Appliance Motor Drive Board |
Use Scenario: Safeguarding DC-DC converter inputs and Ethernet PHY power pins from lightning-induced surges on outdoor telecom equipment. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of secondary TVS arrays and filtering, absorbing up to 3000 W energy. Use Value: Reduces need for multi-stage protection, lowering BOM count and PCB area while meeting IEC 61000-4-5 Level 4 (4 kV) requirements. |
Use Scenario: Clamping voltage spikes generated by brushed DC motor commutation on MCU supply rails and Hall-effect sensor lines in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Fast-response shunt element across motor driver outputs and logic supply, diverting surge current away from embedded controllers. Use Value: Extends MCU lifetime by limiting transient exposure to <24.4 V, even during repeated 200 A inrush events. |
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 | Same DO-214AC (SMA) package; lower PPPM (400 W); VBR 16.7–18.5 V; TJ max = +150 °C. | Limited to non-automotive, lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or AEC-Q101 programs. | Select when cost sensitivity outweighs surge energy requirement and ambient temperature stays ≤85 °C. |
| SMCJ15A | Same DO-214AB (SMC) package; identical 3000 W PPPM and 24.4 V VC; but VBR 16.7–18.5 V and TJ max = +175 °C (not AEC-Q101). | Acceptable for industrial use where AEC-Q101 is not mandated; lacks automotive qualification documentation and whisker test compliance. | Choose for legacy industrial designs requiring same footprint and clamping but without automotive certification overhead. |
Compared with SMAJ15A and SMCJ15A, the 3KASMC15AHE3_A/H delivers higher thermal endurance (+185 °C vs. +150/+175 °C), AEC-Q101 validation, and JESD 201 Class 2 whisker resistance - making it the sole option for new automotive designs requiring long-term reliability under thermal cycling and vibration stress.
Availability
3KASMC15AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 3KASMC15AHE3_A/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, rectifiers, and protection devices for demanding industrial and automotive applications.
The 3KASMC series was engineered specifically for AEC-Q101-compliant transient suppression in high-temperature automotive subsystems, emphasizing thermal stability, surge robustness, and process-controlled passivation for extended field life.
FAQ
What is the maximum clamping voltage of the 3KASMC15AHE3_A/H under a 10/1000 μs surge?
The 3KASMC15AHE3_A/H has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 123 A using the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 24.4 V during worst-case transient events. The 3KASMC15AHE3_A/H maintains this clamping performance across its full operating temperature range up to +185 °C junction temperature.
Is the 3KASMC15AHE3_A/H AEC-Q101 qualified and what does that cover?
Yes, the 3KASMC15AHE3_A/H is fully AEC-Q101 qualified, covering stress tests including temperature cycling, high-temperature operating life, unbiased highly accelerated stress test (uHAST), and mechanical shock. Its HM3 suffix confirms qualification per AEC-Q101 Rev D, plus JESD 201 Class 2 whisker resistance and RoHS compliance. The 3KASMC15AHE3_A/H qualification applies specifically to the DO-214AB (SMC) package variant with the "HM3" base code and "_A/H" tape-and-reel delivery mode.
What is the meaning of the "_A/H" suffix in 3KASMC15AHE3_A/H?
The "_A/H" suffix in 3KASMC15AHE3_A/H denotes the packaging configuration: "A" indicates the HM3 base part number with AEC-Q101 qualification, and "H" specifies 7-inch plastic tape-and-reel delivery with 850 units per reel. This matches Vishay's ordering code 3KASMC15AHM3_A/H. The "E3" portion reflects Vishay's internal revision level and environmental compliance (lead-free, RoHS). The 3KASMC15AHE3_A/H is not a sample or evaluation unit - it is the full-production, qualified version intended for volume automotive and industrial manufacturing.
Can the 3KASMC15AHE3_A/H replace the older SMAJ15A in an existing design?
No, the 3KASMC15AHE3_A/H is not a direct replacement for SMAJ15A due to different packages (DO-214AB vs. DO-214AC), higher power rating (3000 W vs. 400 W), and stricter automotive qualification. While both share 15 V VWM and similar VBR, the 3KASMC15AHE3_A/H requires larger PCB pads and thermal relief. Replacing SMAJ15A with 3KASMC15AHE3_A/H demands layout review, solder profile adjustment, and revalidation of surge immunity - especially for thermal performance and mechanical mounting integrity.
What is the thermal resistance (RθJA) of the 3KASMC15AHE3_A/H and how does it affect layout?
The 3KASMC15AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 77.5 °C/W when mounted on the minimum recommended pad layout per Vishay spec. This value assumes no heatsinking - so for sustained power dissipation or high ambient temperatures, designers must increase copper area, add thermal vias, or use internal layers to reduce effective RθJA. The 3KASMC15AHE3_A/H's 185 °C TJ rating allows operation at elevated ambient, but thermal design remains critical to avoid exceeding 6.0 W steady-state power dissipation (PD) at TL = 75 °C.
3KASMC15AHE3_A/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:
- 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_A/H FAQ
1.How can I place an order for 3KASMC15AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHE3_A/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 3KASMC15AHE3_A/H reliable?
The price and inventory of 3KASMC15AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHE3_A/H?
3KASMC15AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHE3_A/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 3KASMC15AHE3_A/H?
For technical support, including 3KASMC15AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHE3_A/H requirements.
6.How does Aetrix verify that 3KASMC15AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHE3_A/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 3KASMC15AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHE3_A/H?
All 3KASMC15AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHE3_A/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 3KASMC15AHE3_A/H part is unused and in its original packaging.
Return procedure for 3KASMC15AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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