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Vishay General Semiconductor - Diodes Division 3KASMC15AHE3_B/I
- Part No.:
- 3KASMC15AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3KASMC15AHE3_B/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
3KASMC15AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge clamping in automotive and industrial power rails. It features 15 V stand-off voltage (VWM), 17.6 V nominal breakdown voltage (VBR), 3000 W peak pulse power (10/1000 μs), 185 °C maximum junction temperature, and AEC-Q101 qualification - deployed to protect MOSFETs and ICs against inductive switching transients in engine control units.
For engineers reviewing the 3KASMC15AHE3_B/I datasheet, 3KASMC15AHE3_B/I pinout, 3KASMC15AHE3_B/I application, or 3KASMC15AHE3_B/I equivalent, key selection criteria include clamping voltage at rated surge current (24.4 V @ 123 A), unidirectional polarity, thermal resistance (RθJA = 77.5 °C/W), and RoHS-compliant, halogen-free HE3 suffix with 13" tape-and-reel packaging.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under repeated surge stress. Its 185 °C TJ max rating enables operation in under-hood automotive environments without derating penalties up to 150 °C ambient.
The device delivers 24.4 V clamping voltage at 123 A peak pulse current (10/1000 μs), with low incremental surge resistance ensuring minimal voltage overshoot during fast transients. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuitry. |
| VBR (nom) | 17.6 V - Breakdown voltage at 1 mA test current; ensures reliable turn-on just above normal operating rail. |
| VC @ IPPM | 24.4 V - Clamping voltage at 123 A peak pulse current; limits downstream voltage stress during worst-case surge. |
| PPPM | 3000 W - Peak pulse power handling (10/1000 μs); supports robust protection against ISO 7637-2 Pulse 1/2a/5a events. |
| TJ max | 185 °C - Maximum junction temperature; enables direct placement near hot components in AEC-Q101-compliant ECUs. |
| RθJA | 77.5 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs heatsinking requirements for sustained surge duty. |
| Polarity | Unidirectional - Cathode-banded configuration protects only against positive transients; requires correct orientation in series with power rail. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., 12 V rail); conducts transient energy to ground when voltage exceeds VBR. |
| Anode | Reference/return path | Typically tied to system ground; completes clamping path; must maintain low-inductance connection for effective transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for ECU, body control, and ADAS modules. |
| 185 °C junction capability | Enables uninterrupted operation in high-temperature zones (e.g., near engine blocks or power inverters) without thermal shutdown or parameter drift. |
| 3000 W peak pulse power (10/1000 μs) | Withstands severe load-dump and inductive kick events per ISO 16750-2 and SAE J1113-11 standards without degradation. |
| Low clamping ratio (VC/VBR = 1.38) | Minimizes overvoltage exposure to downstream ICs - critical for safeguarding 16 V-rated CAN transceivers and microcontrollers. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protects MCU power supply and gate drivers from load-dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps >120 V spikes within nanoseconds. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V regulators and CAN FD transceivers during ISO 16750-2 Pulse 5a testing. |
Use Scenario: Shields IGBT gate driver ICs and bootstrap diodes from voltage reversal during inductive motor coil commutation. IC Role / Device Role / Timing Role: Mounted across DC bus rails to clamp flyback energy; operates in parallel with bulk capacitors. Use Value: Limits voltage overshoot to ≤24.4 V during 123 A surge events, preserving gate oxide integrity and preventing false triggering. |
| Telecom Base Station Power Input | Automotive Body Control Module (BCM) |
Use Scenario: Guards AC/DC front-end rectifiers and PFC controllers against lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of primary filtering; absorbs multi-kW pulses before they reach active circuitry. Use Value: Maintains system uptime by surviving 3000 W surges without parametric shift - verified per IEC 61000-4-5 Level 4. |
Use Scenario: Safeguards LIN transceivers and LED driver ICs from relay coil back-EMF in door module and lighting circuits. IC Role / Device Role / Timing Role: Localized TVS on each switched 12 V output; oriented cathode-to-rail to suppress positive-going transients only. Use Value: Eliminates field failures caused by >100 V spikes from 200 A inrush currents in solenoid loads per ISO 7637-2 Pulse 1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5A (Vishay) | Same VWM (15 V) and unidirectional polarity, but lower PPPM (400 W) and smaller SMA package (DO-214AC); RθJA = 110 °C/W. | Not suitable for automotive load-dump; limited to low-energy signal-line protection or consumer-grade 12 V rails. | Select only if space-constrained and surge energy is <500 W; verify thermal margin with board-level derating. |
| SMCJ15A (Littelfuse) | Identical VWM (15 V), VBR (16.7–18.5 V), and SMC package; same 3000 W rating but no AEC-Q101 documentation in public datasheet. | Lacks formal automotive qualification evidence; may require additional customer validation for Tier 1 ECU use. | Acceptable for industrial motor drives where AEC-Q101 is not mandated; confirm compliance status directly with Littelfuse. |
Compared with SMAJ15A-E3/5A and SMCJ15A, the 3KASMC15AHE3_B/I provides guaranteed AEC-Q101 qualification, superior thermal performance (RθJA = 77.5 °C/W vs. 110 °C/W), and documented 185 °C operation - making it the preferred choice for production automotive electronics requiring zero-risk surge immunity.
Availability
3KASMC15AHE3_B/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom base station power inputs, and body control modules requiring stable component supply across extended temperature ranges and high-surge environments.
Supply support for 3KASMC15AHE3_B/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 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-environment power systems - emphasizing thermal robustness, surge endurance, and process-controlled consistency across automotive production lots.
FAQ
What is the clamping voltage of the 3KASMC15AHE3_B/I at its rated peak pulse current?
The 3KASMC15AHE3_B/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 123 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88480 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 3KASMC15AHE3_B/I maintains this clamping performance across its full operating temperature range.
Is the 3KASMC15AHE3_B/I qualified for automotive applications?
Yes, the 3KASMC15AHE3_B/I is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet 88480 under "Mechanical Data" and "Ordering Information." Its HE3 suffix denotes RoHS-compliant and AEC-Q101-qualified construction, validated for temperature cycling, high-temperature reverse bias, and surge endurance - making the 3KASMC15AHE3_B/I suitable for engine control units, body control modules, and ADAS power supplies.
What does the "HE3_B/I" suffix mean in 3KASMC15AHE3_B/I?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads; "B" is the revision code; and "I" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This distinguishes the 3KASMC15AHE3_B/I from the "H" variant (7-inch reel, 850 units) and confirms compliance with automotive reliability and environmental standards.
Can the 3KASMC15AHE3_B/I be used in bidirectional protection configurations?
No, the 3KASMC15AHE3_B/I is unidirectional only, as stated in the "Features" section of the Vishay datasheet. It clamps positive transients relative to ground and must be oriented with the cathode band toward the protected line. For bidirectional protection, two 3KASMC15AHE3_B/I devices would need to be connected in series opposing configuration - but Vishay does not characterize or guarantee that arrangement, and dedicated bidirectional TVS devices are recommended instead.
What is the thermal resistance of the 3KASMC15AHE3_B/I, and how does it affect layout?
The 3KASMC15AHE3_B/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 FR-4 PCB with specified copper area; reducing thermal resistance requires increasing copper pour area or adding thermal vias. Layout decisions directly impact sustained surge capability - undersized pads may cause premature thermal failure during repetitive transients.
3KASMC15AHE3_B/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:
- 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)
3KASMC15AHE3_B/I FAQ
1.How can I place an order for 3KASMC15AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 3KASMC15AHE3_B/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 3KASMC15AHE3_B/I reliable?
The price and inventory of 3KASMC15AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3KASMC15AHE3_B/I is usually 5 days.
3.What payment methods are accepted for 3KASMC15AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3KASMC15AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3KASMC15AHE3_B/I?
3KASMC15AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3KASMC15AHE3_B/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 3KASMC15AHE3_B/I?
For technical support, including 3KASMC15AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3KASMC15AHE3_B/I requirements.
6.How does Aetrix verify that 3KASMC15AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All 3KASMC15AHE3_B/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 3KASMC15AHE3_B/I meets industry standards.
7.What is the process for return or replacement of 3KASMC15AHE3_B/I?
All 3KASMC15AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 3KASMC15AHE3_B/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 3KASMC15AHE3_B/I part is unused and in its original packaging.
Return procedure for 3KASMC15AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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