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Vishay General Semiconductor - Diodes Division SM6S26HE3/2D
- Part No.:
- SM6S26HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S26HE3/2D.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
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Product details
Overview
SM6S26HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor designed for automotive load dump protection in 12 V and 24 V systems. It features a 26.0 V standoff voltage (VWM), 28.9–35.3 V breakdown range (VBR), 46.6 V clamping voltage at 99 A peak pulse current, 4600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the SM6S26HE3/2D datasheet, SM6S26HE3/2D pinout, SM6S26HE3/2D application, or SM6S26HE3/2D equivalent, this device is selected for high-surge, high-temperature (>150 °C case) transient suppression where low leakage (<10 µA at VWM), low forward voltage (<1.9 V @ 100 A), and DO-218AB package thermal performance are critical.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping behavior across -55 °C to +175 °C junction temperature. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to PCB copper planes for enhanced thermal dissipation.
The device meets ISO 7637-2 surge requirements for automotive load dump transients and complies with MSL Level 1 (245 °C reflow). With RθJC = 0.95 °C/W and 6 W steady-state power dissipation on infinite heatsink, it supports robust thermal management in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before conduction begins; defines system working voltage margin. |
| VBR min/max | 28.9 V / 35.3 V at 5 mA - Confirmed breakdown threshold range ensures reliable turn-on during transients without premature triggering. |
| VC @ IPPM | 46.6 V at 99 A (10/1000 µs) - Clamping voltage limits downstream IC stress during worst-case surges. |
| PPPM | 4600 W (10/1000 µs) - Peak surge energy handling capacity for automotive load dump events per ISO 7637-2. |
| IFSM | 600 A (8.3 ms half-sine) - Forward surge rating supports high-current inductive switching events. |
| TJ max | +175 °C - Enables operation in engine compartment environments without derating penalties. |
| Leakage @ VWM | <10 µA at 25 °C - Minimizes standby power loss and avoids false triggering in low-power circuits. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally optimized case with metal heatsink terminal (anode) and molded body meeting UL 94 V-0. Dimensions: 15.4 mm × 9.3 mm × 3.0 mm (L × W × H); anode lead marked by sprocket hole orientation on 13" tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Standard cathode connection; connects to protected line (e.g., battery rail) for unidirectional clamping. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical anode; must be soldered to large copper pour for optimal RθJC and surge current handling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| Junction passivation | Stable VBR and low leakage maintained over lifetime, even under high-temperature bias stress (TJ = 175 °C). |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 245 °C peak without moisture-induced damage. |
| ISO 7637-2 compliance | Validated for load dump waveforms (including 10 ms exponential) in 12 V/24 V vehicle electrical systems. |
| Low forward voltage | ≤1.9 V at 100 A enables minimal conduction loss during high-current surge events. |
Applications
| Automotive Load Dump Protection | Industrial Power Supply Input Protection |
|---|---|
Use Scenario: Protecting ECUs, body control modules, and infotainment systems from 12 V/24 V battery line transients during alternator load dump. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between battery rail and input filter capacitor. Use Value: Limits transient voltage to ≤46.6 V, preventing damage to downstream DC/DC converters and microcontrollers rated for 40 V absolute maximum. |
Use Scenario: Safeguarding industrial PLC power inputs against switching surges from relay coils and solenoids. IC Role / Device Role / Timing Role: Primary surge suppression element on 24 V DC input stage before EMI filtering. Use Value: Absorbs 4600 W pulses without degradation, maintaining system uptime in factory automation environments with frequent inductive switching. |
| Automotive Lighting Circuit Protection | Commercial Vehicle CAN Bus Power Rail Protection |
Use Scenario: Shielding LED headlamp drivers and adaptive front-lighting systems from ignition-induced spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12 V supply rail upstream of LED driver ICs. Use Value: Clamps sub-100 ns transients within 46.6 V, preserving driver MOSFET gate oxide integrity and enabling >100,000-cycle lamp life. |
Use Scenario: Securing 12 V power rail feeding CAN transceivers in heavy-duty truck telematics units. IC Role / Device Role / Timing Role: Standoff-rated protector on VCC line to prevent bus shutdown during cranking transients. Use Value: Maintains <10 µA leakage at 26 V, avoiding false wake-up or brownout in always-on CAN nodes while surviving repeated 300 V/100 ms surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/5AT | Lower PPPM (400 W), SMA package (RθJC ≈ 45 °C/W), bidirectional option available | Not suitable for automotive load dump; limited to low-energy ESD/surge events in consumer electronics | Select only for cost-sensitive, non-automotive designs with <500 W surge requirements and no AEC-Q101 mandate. |
| 1.5KE27A | Through-hole DO-201 package, higher VC (43.0 V), same VWM/VBR range, no AEC-Q101 qualification | Lacks MSL Level 1 and thermal performance for SMT automotive production; requires wave soldering | Consider for legacy industrial repairs or prototyping where board space and reflow compatibility are not constraints. |
Compared with SMAJ26A-E3/5AT and 1.5KE27A, SM6S26HE3/2D delivers 11.5× higher surge power, integrated thermal design for SMT, and full AEC-Q101 validation-making it the only choice for production automotive load dump protection requiring zero layout change and guaranteed high-temperature reliability.
Availability
SM6S26HE3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input stages, commercial vehicle lighting systems, and CAN bus power rail safeguarding requiring stable component supply across extended temperature and surge conditions.
Supply support for SM6S26HE3/2D 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 SM6S series was engineered specifically for automotive load dump and ISO 7637-2 compliance, emphasizing thermal robustness, AEC-Q101 qualification, and DO-218AB package efficiency in high-power transient suppression.
FAQ
What is the clamping voltage of the SM6S26HE3/2D at its rated peak pulse current?
The SM6S26HE3/2D has a maximum clamping voltage (VC) of 46.6 V at 99 A peak pulse current with a 10/1000 µs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number: 88384, Rev. 22-Jul-16) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SM6S26HE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM6S26HE3/2D qualified for automotive applications?
Yes, the SM6S26HE3/2D is AEC-Q101 qualified and explicitly designed for automotive use, including under-hood environments. It meets ISO 7637-2 load dump requirements and is rated for continuous operation from -55 °C to +175 °C junction temperature. The HE3 suffix confirms RoHS compliance and whisker resistance per JESD 201 Class 2, making SM6S26HE3/2D suitable for production automotive electronics.
What is the package type and thermal resistance of the SM6S26HE3/2D?
The SM6S26HE3/2D uses the DO-218AB surface-mount package with a metal heatsink terminal (anode) and matte tin-plated leads. Its typical junction-to-case thermal resistance (RθJC) is 0.95 °C/W, enabling efficient heat transfer to PCB copper when properly mounted. This low RθJC supports sustained 6 W power dissipation on an infinite heatsink and is critical for maintaining reliability during repetitive surge events in the SM6S26HE3/2D's intended applications.
Does the SM6S26HE3/2D have unidirectional or bidirectional polarity?
The SM6S26HE3/2D is unidirectional only, with polarity defined such that the metal heatsink serves as the anode and Lead 1 as the cathode. This configuration allows it to clamp positive transients on a DC line while blocking reverse voltage. The datasheet explicitly states "Available in uni-directional polarity only" and specifies heatsink-as-anode orientation-no bidirectional variant exists in the SM6S26HE3/2D family.
What surge waveform standards does the SM6S26HE3/2D meet?
The SM6S26HE3/2D meets ISO 7637-2 surge specifications for automotive load dump transients, validated using both 10/1000 µs and 10/10,000 µs waveforms. It also supports 8.3 ms half-sine forward surge testing (IFSM = 600 A) and complies with MSL Level 1 per J-STD-020. These capabilities are documented in the official Vishay datasheet for SM6S26HE3/2D and confirm suitability for harsh automotive electrical environments.
SM6S26HE3/2D 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 99A
- 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
SM6S26HE3/2D FAQ
1.How can I place an order for SM6S26HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S26HE3/2D 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 SM6S26HE3/2D reliable?
The price and inventory of SM6S26HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S26HE3/2D is usually 5 days.
3.What payment methods are accepted for SM6S26HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S26HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S26HE3/2D?
SM6S26HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S26HE3/2D 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 SM6S26HE3/2D?
For technical support, including SM6S26HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S26HE3/2D requirements.
6.How does Aetrix verify that SM6S26HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S26HE3/2D 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 SM6S26HE3/2D meets industry standards.
7.What is the process for return or replacement of SM6S26HE3/2D?
All SM6S26HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S26HE3/2D, 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 SM6S26HE3/2D part is unused and in its original packaging.
Return procedure for SM6S26HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S26HE3/2D Tags
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