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Vishay General Semiconductor - Diodes Division SM8S15-E3/2D
- Part No.:
- SM8S15-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S15-E3/2D.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,479
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Product details
Overview
SM8S15-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 12 V systems. It features a 15.0 V stand-off voltage (VWM), 245 A peak pulse current (IPPM, 10/1000 μs), 26.9 V clamping voltage (VC), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM8S15-E3/2D datasheet, SM8S15-E3/2D pinout, SM8S15-E3/2D application, or SM8S15-E3/2D equivalent, key selection criteria include its DO-218AB package thermal performance (RθJC = 0.90 °C/W), 175 °C junction rating, 6600 W peak pulse power (10/1000 μs), and compliance with ISO 7637-2 surge requirements.
Technical Context
The SM8S15-E3/2D uses passivated anisotropic rectifier technology to deliver low leakage (<10 μA at VWM) and low forward voltage drop (<1.8 V at 100 A). Its unidirectional polarity and heatsink-anode configuration enable direct mounting to PCB copper planes for enhanced thermal dissipation.
Rated for TJ = −55 °C to +175 °C, it supports automotive-grade reliability under sustained high-temperature operation and meets MSL Level 1 (245 °C reflow peak). The device is optimized for 10 ms exponential load dump waveforms per ISO 7637-2, with derated power above 25 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold for 12 V automotive rails. |
| VC @ IPPM | 26.9 V - Clamped voltage at 245 A (10/1000 μs); ensures downstream ICs remain below absolute maximum ratings during transients. |
| PPPM (10/1000 μs) | 6600 W - Peak surge power handling; enables robust protection against severe load dump events without failure. |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; allows precise thermal design when mounted on heatsinked PCB copper. |
| IFSM | 700 A - Non-repetitive forward surge current (8.3 ms half-sine); supports high-energy inductive switching events. |
| TJ max. | +175 °C - Maximum junction temperature; enables placement near hot engine control units without derating. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink tab (anode) and molded body meeting UL 94 V-0. Matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected line (e.g., battery rail); carries transient current into the device during clamping. |
| Lead 2 / Metal Heatsink Tab | Anode | Electrically and thermally connected to PCB ground plane; serves as primary heat path and circuit return. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use per stress test requirements including HTOL, TC, and HAST. |
| ISO 7637-2 compliant | Meets Pulse 5a/b load dump immunity up to 10 ms exponential waveform without degradation. |
| MSL Level 1 | Rated for 245 °C peak reflow profile; eliminates moisture sensitivity concerns during SMT assembly. |
| Junction passivation | Optimized anisotropic rectifier structure ensures stable leakage (<10 μA at VWM) across full temperature range. |
| Low RθJC | 0.90 °C/W thermal resistance enables >8 W steady-state power dissipation on infinite heatsink at 25 °C case temp. |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protection of 12 V supply input against alternator load dump surges during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy before it reaches MCU power rails and CAN transceivers. Use Value: Limits clamped voltage to 26.9 V at 245 A, ensuring downstream 3.3 V/5 V regulators and microcontrollers remain within safe operating limits. |
Use Scenario: Surge suppression on LIN bus power lines exposed to relay switching noise and ESD events. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at BCM power entry point to absorb repetitive 100 ns–100 μs spikes. Use Value: Maintains <10 μA leakage at 15 V, minimizing standby current impact on vehicle battery drain over extended parking periods. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Input | Electric Power Steering (EPS) Motor Driver Supply |
|
Use Scenario: Input protection for 12 V camera modules mounted near engine compartments subject to thermal cycling and load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera module DC-DC converter input stage. Use Value: 175 °C rated junction enables reliable operation at ambient temperatures up to 125 °C, eliminating thermal shutdown risk. |
Use Scenario: Protection of H-bridge gate driver ICs from inductive kickback during EPS motor commutation. IC Role / Device Role / Timing Role: High-surge-capability TVS absorbing 700 A single-pulse forward surge (IFSM) from motor windings. Use Value: 6600 W peak power rating prevents catastrophic failure during worst-case motor stall or short-circuit 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-E3/5AT | DO-214AC package, lower PPPM (400 W), higher VC (24.4 V), same VWM (15 V), not AEC-Q101 qualified. | Limited to non-automotive industrial or consumer applications; insufficient for ISO 7637-2 load dump. | Select only for cost-sensitive, non-automotive designs where 6600 W surge capacity is unnecessary. |
| SM8S15A-E3/2D | Same DO-218AB package, tighter VBR (16.7–18.5 V), lower VC (24.4 V), identical thermal and surge ratings. | Better clamping margin for systems requiring stricter overvoltage control; same automotive qualification. | Prefer when lower clamping voltage improves system-level safety margin, especially with 28 V tolerant components. |
Compared with SMAJ15A-E3/5AT and SM8S15A-E3/2D, the SM8S15-E3/2D provides the optimal balance of high-power surge capability (6600 W), automotive qualification, and proven thermal performance in DO-218AB-making it the default choice for production-grade 12 V load dump protection where reliability is critical.
Availability
SM8S15-E3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power inputs requiring stable component supply across multi-year production cycles.
Supply support for SM8S15-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 TVS devices for automotive, industrial, and computing markets.
The SM8S series was engineered specifically for automotive load dump protection, combining high-temperature stability (175 °C), AEC-Q101 qualification, and industry-leading 6600 W surge capability in the DO-218AB package.
FAQ
What is the clamping voltage of the SM8S15-E3/2D at its rated peak pulse current?
The SM8S15-E3/2D has a maximum clamping voltage (VC) of 26.9 V when subjected to its rated peak pulse current of 245 A using the standard 10/1000 μs waveform. This value is measured at TC = 25 °C and ensures protected circuits remain within safe voltage limits during transient events. The SM8S15-E3/2D maintains this clamping performance across its full operating temperature range.
Is the SM8S15-E3/2D qualified for automotive applications?
Yes, the SM8S15-E3/2D is AEC-Q101 qualified and explicitly designed for automotive under-hood use. It meets ISO 7637-2 load dump requirements, operates reliably from −55 °C to +175 °C, and is rated for MSL Level 1 reflow. These qualifications are documented in Vishay's official specification document 88387, confirming the SM8S15-E3/2D for production automotive ECUs and BCMs.
What package does the SM8S15-E3/2D use, and how is it mounted?
The SM8S15-E3/2D uses the DO-218AB surface-mount package, featuring a metal heatsink tab (anode) that must be soldered directly to a large PCB copper area for thermal management. Lead 1 is the cathode, and the heatsink tab serves as both electrical anode connection and primary thermal path. Mounting requires adherence to Vishay's recommended pad layout for optimal RθJC = 0.90 °C/W performance.
How does the SM8S15-E3/2D differ from the SM8S15A-E3/2D variant?
The SM8S15-E3/2D has a breakdown voltage range of 16.7–20.4 V and clamps at 26.9 V, while the SM8S15A-E3/2D offers tighter VBR (16.7–18.5 V) and lower VC (24.4 V). Both share identical package, surge ratings, and AEC-Q101 qualification. The SM8S15-E3/2D is selected when broader VBR tolerance is acceptable; the 'A' variant is preferred for tighter clamping control in sensitive 28 V-tolerant systems.
What is the maximum continuous reverse leakage current for the SM8S15-E3/2D?
The SM8S15-E3/2D exhibits a maximum reverse leakage current (ID) of 10 μA at its 15.0 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated junction temperature (TJ = 175 °C), leakage remains ≤150 μA-ensuring minimal impact on system standby power consumption in automotive applications where battery drain is critical.
SM8S15-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:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 245A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S15-E3/2D FAQ
1.How can I place an order for SM8S15-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S15-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 SM8S15-E3/2D reliable?
The price and inventory of SM8S15-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 SM8S15-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S15-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S15-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S15-E3/2D?
SM8S15-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S15-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 SM8S15-E3/2D?
For technical support, including SM8S15-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S15-E3/2D requirements.
6.How does Aetrix verify that SM8S15-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S15-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 SM8S15-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S15-E3/2D?
All SM8S15-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S15-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 SM8S15-E3/2D part is unused and in its original packaging.
Return procedure for SM8S15-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S15-E3/2D Tags
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