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Vishay General Semiconductor - Diodes Division SM6S15AHE3/2D
- Part No.:
- SM6S15AHE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S15AHE3/2D.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,578
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Product details
Overview
SM6S15AHE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 5 mA, 24.4 V clamping voltage (VC) at 150 A peak pulse current, and 4600 W peak pulse power (10/1000 μs). Its DO-218AB package supports TJ = 175 °C operation and AEC-Q101 qualification.
For engineers reviewing the SM6S15AHE3/2D datasheet, SM6S15AHE3/2D pinout, SM6S15AHE3/2D application, or SM6S15AHE3/2D equivalent, key selection criteria include unidirectional polarity, ISO7637-2 compliance for load dump transients, low leakage (<10 μA at VWM), high surge capability (600 A IFSM), and thermal resistance RθJM = 0.45 °C/W for heatsink-mounted designs.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping under repetitive high-energy transients. Its junction temperature rating of 175 °C and MSL Level 1 qualification enable use in under-hood automotive environments without derating penalties.
The device operates exclusively in unidirectional mode with anode-connected metal heatsink-critical for correct PCB layout and thermal management. Clamping performance is specified per 10/1000 μs waveform, and its 0.080 %/°C VBR temperature coefficient enables predictable voltage shift across operating temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse working voltage before clamping initiates; defines system bus voltage compatibility. |
| VBR (min/max) | 16.7 V / 18.5 V at 5 mA - Tight ±5 % tolerance ensures consistent turn-on across production lots. |
| VC @ IPPM | 24.4 V at 150 A - Clamping voltage during 10/1000 μs surge; determines protected circuit's maximum transient overvoltage. |
| PPPM (10/1000 μs) | 4600 W - Peak pulse power handling capacity; supports severe automotive load dump events per ISO7637-2. |
| TJ max | 175 °C - Enables direct mounting on chassis or heatsink in high-ambient under-hood locations. |
| RθJM | 0.45 °C/W - Low junction-to-mount thermal resistance confirms efficient heat transfer to external heatsink. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, temperature cycling, and HTRB testing. |
Pinout & Package
Package: DO-218AB - molded surface-mount case with integral metal heatsink (anode terminal), UL 94 V-0 rated, RoHS-compliant, and JESD201 Class 2 whisker tested.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Anode connection | Connected to system ground or low-side reference; must be routed to heatsink plane for thermal performance. |
| Lead 2 / Metal Heatsink | Anode (same as Lead 1) | Primary thermal path and electrical anode node; requires direct metal contact to PCB copper pour or chassis. |
| Cathode (marked end) | Cathode connection | Connected to protected line (e.g., 12 V battery rail); polarity marking visible on top surface. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage over lifetime and temperature. |
| Unidirectional polarity | Enables precise placement on positive-rail protection paths without reverse-bias risk during normal operation. |
| Low forward voltage drop | VF ≤ 1.9 V at 100 A (300 μs pulse) minimizes conduction loss during clamping events. |
| ISO7637-2 compliance | Validated for load dump waveforms up to 10 ms exponential decay-critical for 12 V automotive systems. |
| MSL Level 1 | Reflow-compatible up to 245 °C peak without moisture-induced damage; no bake required pre-assembly. |
Applications
| Automotive Load Dump Protection | 12 V Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting engine control units (ECUs), body control modules (BCMs), and infotainment systems from alternator load dump transients (up to 40 V, 100 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and protected IC input, clamping within 1 ns to limit voltage excursion. Use Value: Prevents latch-up or gate oxide damage in downstream PMICs and microcontrollers by limiting peak voltage to 24.4 V at 150 A. |
Use Scenario: Safeguarding CAN transceivers, LIN interfaces, and sensor signal conditioners connected to shared 12 V supply lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, coordinated with upstream fuses and downstream ceramic decoupling. Use Value: Maintains <10 μA leakage at 15 V to avoid quiescent current budget violations in always-on automotive modules. |
| Under-Hood Power Distribution | Industrial DC Power Input Protection |
Use Scenario: Front-end protection for ADAS domain controllers and radar modules exposed to high ambient temperatures (>125 °C). IC Role / Device Role / Timing Role: High-reliability TVS mounted directly to aluminum heatsink, leveraging RθJM = 0.45 °C/W for thermal stability. Use Value: Sustains full 4600 W surge capability at TJ = 175 °C-enabling compact, fanless enclosure designs. |
Use Scenario: Protecting programmable logic controllers (PLCs), motor drives, and industrial HMIs powered from unregulated 24 V DC supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing switching transients from solenoid valves, contactors, and relay coils. Use Value: Withstands 600 A non-repetitive surge (IFSM), eliminating need for redundant parallel devices in high-inductance load circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S15AHM3 | Same VWM/VBR/VC specs; HM3 suffix indicates halogen-free, matte tin termination, and updated revision code (vs. HE3). | Identical automotive load dump use case; HM3 replaces HE3 in new designs per Vishay's "Not For New Designs" notice. | Select SM6S15AHM3 for new designs requiring latest material compliance and long-term availability. |
| SMAJ15A | Lower PPPM (400 W vs. 4600 W), DO-214AC package, no AEC-Q101 qualification, RθJA = 40 °C/W (no dedicated heatsink). | Suitable only for low-energy consumer or industrial transients-not for ISO7637-2 load dump or under-hood automotive. | Use SMAJ15A only in cost-sensitive, non-automotive applications where surge energy remains below 100 mJ. |
Compared with SM6S15AHE3/2D, SM6S15AHM3 offers identical electrical and thermal performance with enhanced environmental compliance, while SMAJ15A provides basic clamping at one-tenth the power rating and lacks automotive qualification-making it unsuitable for load dump or high-reliability deployment.
Availability
SM6S15AHE3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, 12 V power rail surge suppression, and under-hood power distribution requiring stable component supply and long-lifecycle support.
Supply support for SM6S15AHE3/2D 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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SM6SxxA family was engineered specifically for high-energy automotive transient suppression-delivering AEC-Q101 reliability, DO-218AB thermal efficiency, and ISO7637-2 compliance in a single surface-mount solution.
FAQ
What is the clamping voltage of the SM6S15AHE3/2D at its rated peak pulse current?
The SM6S15AHE3/2D has a maximum clamping voltage (VC) of 24.4 V when subjected to a 150 A peak pulse current with a 10/1000 μs waveform. This value is measured at TC = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6S15AHE3/2D maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient of 0.080 %/°C.
Is the SM6S15AHE3/2D suitable for new automotive designs?
No-the Vishay datasheet explicitly states "Not For New Designs" for the SM6S15AHE3/2D, recommending SM6S15AHM3 as the replacement. While SM6S15AHE3/2D remains available for legacy production and repair, new designs should use SM6S15AHM3, which shares identical electrical specifications but incorporates updated material compliance and packaging revisions. The SM6S15AHE3/2D is still fully functional and qualified per AEC-Q101.
How is the anode terminal configured on the SM6S15AHE3/2D DO-218AB package?
The SM6S15AHE3/2D uses a dual-anode configuration: Lead 1 and the exposed metal heatsink (Lead 2) are internally connected to the anode. The cathode is marked on the top surface and connects to the protected line. This design requires the metal heatsink to be soldered directly to a large copper pour or chassis ground plane to achieve the specified RθJM = 0.45 °C/W and full 4600 W surge capability.
Does the SM6S15AHE3/2D meet ISO7637-2 requirements?
Yes-the SM6S15AHE3/2D is characterized to meet ISO7637-2 surge test requirements, specifically for load dump transients (Pulse 5a/b), as confirmed in the Vishay datasheet. Its 4600 W peak pulse power rating and 10 ms exponential waveform capability align with the standard's most demanding test conditions. Compliance is validated under defined test setups and does not imply universal pass across all vehicle-level implementations.
What is the maximum junction temperature rating for the SM6S15AHE3/2D?
The SM6S15AHE3/2D has a maximum junction temperature (TJ max) rating of +175 °C, enabling operation in high-ambient under-hood environments without thermal derating. This rating is supported by its DO-218AB package construction, metal heatsink interface, and AEC-Q101 qualification. The device maintains full electrical specifications-including VBR stability and clamping performance-up to this temperature limit.
SM6S15AHE3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- 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):
- 189A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6S15AHE3/2D FAQ
1.How can I place an order for SM6S15AHE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S15AHE3/2D 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 SM6S15AHE3/2D reliable?
The price and inventory of SM6S15AHE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S15AHE3/2D is usually 5 days.
3.What payment methods are accepted for SM6S15AHE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S15AHE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S15AHE3/2D?
SM6S15AHE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S15AHE3/2D 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 SM6S15AHE3/2D?
For technical support, including SM6S15AHE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S15AHE3/2D requirements.
6.How does Aetrix verify that SM6S15AHE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S15AHE3/2D 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 SM6S15AHE3/2D meets industry standards.
7.What is the process for return or replacement of SM6S15AHE3/2D?
All SM6S15AHE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S15AHE3/2D, 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 SM6S15AHE3/2D part is unused and in its original packaging.
Return procedure for SM6S15AHE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S15AHE3/2D Tags
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