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Vishay General Semiconductor - Diodes Division SM6S15A-E3/2D
- Part No.:
- SM6S15A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S15A-E3/2D.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO218AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM6S15A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor (TVS) diode designed for automotive load dump protection in 12 V systems. It features a 15.0 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR), 24.4 V clamping voltage at 189 A peak pulse current (10/1000 μs), 4600 W peak pulse power, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM6S15A-E3/2D datasheet, SM6S15A-E3/2D pinout, SM6S15A-E3/2D application, or SM6S15A-E3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB package thermal performance (RθJC = 0.95 °C/W), TJ = 175 °C operation, low leakage (<10 μA at VWM), and compliance with ISO7637-2 surge testing for automotive electronics.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry to divert transient energy during load dump events. Its junction passivation and anisotropic rectifier technology enable stable performance up to 175 °C junction temperature while maintaining low forward voltage drop (≤1.9 V at 100 A).
The DO-218AB package integrates a metal heatsink terminal (anode) for direct thermal coupling to PCB copper, supporting high surge capability (IPPM = 189 A, IFSM = 600 A) and enabling robust protection without external heat sinking in constrained automotive layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before clamping begins; defines system nominal voltage compatibility (e.g., 12 V automotive bus). |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown occurs within this range at 5 mA test current; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 24.4 V - Clamping voltage at 189 A (10/1000 μs); limits downstream voltage stress during worst-case transients. |
| PPPM (10/1000 μs) | 4600 W - Peak pulse power handling capacity; supports ISO7637-2 Load Dump Pulse 5a (12 V system) compliance. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables placement near hot engine control units without derating. |
| Leakage @ VWM | <10 μA at 25 °C - Minimal standby power loss and signal integrity impact in always-on vehicle modules. |
| Package | DO-218AB - Surface-mount package with integrated metal heatsink (anode terminal); optimized for thermal conduction and high-current surge routing. |
Pinout & Package
DO-218AB package features two terminals: Lead 1 (cathode, marked band) and Lead 2 (metal heatsink/anode). The heatsink serves as both electrical anode connection and primary thermal path to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (banded end) | Cathode | Connected to protected line (e.g., battery rail); carries transient current into the device during clamping. |
| Lead 2 (metal heatsink) | Anode | Electrically and thermally connected to ground plane; provides low-inductance return path and direct thermal dissipation to PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Junction passivation | Stable VBR and leakage over lifetime under high-temperature bias stress (TJ = 175 °C), critical for engine compartment longevity. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85 % RH; no bake requirement prior to reflow, simplifying SMT assembly for Tier 1 suppliers. |
| ISO7637-2 compliant | Withstands Load Dump Pulse 5a (up to 60 V, 400 ms) when used with appropriate series impedance; validated per test condition A/B/C. |
| Low RθJC (0.95 °C/W) | Enables >80 % of 4600 W pulse energy to be conducted directly to PCB copper, reducing localized heating and improving surge endurance. |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of microcontroller power rails and CAN transceivers against alternator load dump surges during battery disconnection. IC Role / Device Role: Unidirectional clamping TVS placed between battery input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤24.4 V during 189 A pulses, preventing latch-up or damage to 3.3 V/5 V logic and 12 V analog front-ends. |
Use Scenario: Safeguarding LIN bus transceivers and LED driver ICs from switching transients generated by door lock actuators and window motors. IC Role / Device Role: Parallel-connected TVS on 12 V supply line upstream of local regulators. Use Value: Maintains <10 μA leakage at 15 V, avoiding quiescent current penalties in always-on modules while clamping spikes to safe levels. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Start-Stop System Power Management |
Use Scenario: Protecting image sensor interface lines and power inputs from ESD and load dump events in compact rear-view camera housings. IC Role / Device Role: Primary overvoltage clamp on main 12 V input, mounted adjacent to connector for shortest possible transient path. Use Value: DO-218AB's metal heatsink enables direct thermal coupling to ground plane, sustaining repeated 4600 W surges without solder joint fatigue. |
Use Scenario: Guarding buck controller ICs and gate drivers during aggressive battery voltage recovery after engine restart in 12 V start-stop systems. IC Role / Device Role: High-energy TVS on pre-regulator input to absorb 10/1000 μs transients exceeding 100 A. Use Value: 175 °C rated junction allows placement near power MOSFETs without thermal derating, preserving board space in dense power modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5B (Vishay) | DO-214AC (SMA) package; lower PPPM (400 W); RθJC = 40 °C/W; same VWM/VBR range. | Limited to lower-energy transients (e.g., ESD, inductive switch-off); unsuitable for full load dump. | Select SMAJ15A-E3/5B only for cost-sensitive non-automotive applications where surge energy ≤400 W. |
| 1.5SMC15A (ON Semiconductor) | DO-214AB (SMC) package; PPPM = 1500 W; VBR = 16.7–18.5 V; RθJC = 3.5 °C/W; AEC-Q101 not specified. | Requires larger PCB footprint; insufficient for ISO7637-2 Pulse 5a; suitable for industrial 12 V systems. | Choose 1.5SMC15A for legacy industrial designs needing higher surge rating than SMA but without automotive qualification. |
Compared with SMAJ15A-E3/5B and 1.5SMC15A, the SM6S15A-E3/2D uniquely delivers 4600 W surge capability in a thermally optimized DO-218AB package with AEC-Q101 validation-making it the only option among the three qualified for under-hood automotive load dump protection.
Availability
SM6S15A-E3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SM6S15A-E3/2D 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SM6SxxA family is engineered specifically for automotive load dump and ISO7637-2 transient suppression, emphasizing high-temperature stability (TJ = 175 °C), low thermal resistance, and AEC-Q101 compliance from wafer to final test.
FAQ
What is the maximum clamping voltage of the SM6S15A-E3/2D under standard test conditions?
The SM6S15A-E3/2D has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 189 A using the 10/1000 μs waveform. This value is measured at TC = 25 °C and guarantees that downstream components see no more than 24.4 V during such transients. The SM6S15A-E3/2D maintains this clamping performance across its full operating temperature range, with minor increases in VC at elevated junction temperatures confirmed in Vishay's thermal derating curves.
Is the SM6S15A-E3/2D suitable for bidirectional transient protection?
No, the SM6S15A-E3/2D is strictly unidirectional and must be installed with correct polarity-its metal heatsink terminal is the anode and the banded lead is the cathode. Bidirectional protection requires a different device such as the SMBJ15CA or a back-to-back configuration. Using the SM6S15A-E3/2D in reverse-biased mode will result in immediate breakdown and potential failure. The SM6S15A-E3/2D datasheet explicitly states "Available in uni-directional polarity only" and defines polarity as "heatsink is anode."
Does the SM6S15A-E3/2D meet RoHS and REACH requirements?
Yes, the SM6S15A-E3/2D carries the HE3 suffix, indicating RoHS-compliant construction per Directive 2011/65/EU and material declarations aligned with REACH SVHC requirements. Vishay confirms compliance in document 99912, and the part is supplied in matte tin-plated leads meeting J-STD-002 solderability standards. The SM6S15A-E3/2D also passes JESD201 Class 2 whisker testing, ensuring long-term interconnect reliability in automotive environments.
What is the thermal resistance from junction to case (RθJC) for the SM6S15A-E3/2D?
The SM6S15A-E3/2D has a typical thermal resistance of 0.95 °C/W from junction to case (RθJC), measured under standard test conditions. This low value is enabled by the DO-218AB package's integral metal heatsink, which provides a direct thermal conduction path to the PCB ground plane. The SM6S15A-E3/2D's RθJC is over 40× better than standard SMA packages, allowing efficient dissipation of 4600 W surge energy without requiring external heatsinks in most automotive PCB layouts.
Can the SM6S15A-E3/2D replace the SM6S15AHE3/2D?
Yes-the SM6S15A-E3/2D and SM6S15AHE3/2D are identical in electrical, thermal, and mechanical specifications. The "HE3" in the latter denotes Vishay's internal base P/N coding for RoHS-compliant, AEC-Q101-qualified parts; the "E3/2D" suffix in SM6S15A-E3/2D reflects the same qualification and packaging (13″ tape and reel, anode toward sprocket hole). Both part numbers refer to the exact same device manufactured to identical specifications per document 88384 revision 22-Jul-16.
SM6S15A-E3/2D 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6S15A-E3/2D FAQ
1.How can I place an order for SM6S15A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S15A-E3/2D 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 SM6S15A-E3/2D reliable?
The price and inventory of SM6S15A-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S15A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM6S15A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S15A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S15A-E3/2D?
SM6S15A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S15A-E3/2D 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 SM6S15A-E3/2D?
For technical support, including SM6S15A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S15A-E3/2D requirements.
6.How does Aetrix verify that SM6S15A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S15A-E3/2D 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 SM6S15A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM6S15A-E3/2D?
All SM6S15A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S15A-E3/2D, 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 SM6S15A-E3/2D part is unused and in its original packaging.
Return procedure for SM6S15A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S15A-E3/2D Tags
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