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Vishay General Semiconductor - Diodes Division SM8S26A-001HE3/2D
- Part No.:
- SM8S26A-001HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S26A-001HE3/2D.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,438
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Product details
Overview
SM8S26A-001HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 24 V systems. It features a 26.0 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), 42.1 V clamping voltage at 157 A peak pulse current, and 6600 W peak pulse power (10/1000 μs). Its DO-218AB package supports high-reliability underhood applications up to TJ = 175 °C.
For engineers reviewing the SM8S26A-001HE3/2D datasheet, SM8S26A-001HE3/2D pinout, SM8S26A-001HE3/2D application, or SM8S26A-001HE3/2D equivalent, key selection criteria include unidirectional polarity, ISO7637-2 compliance, AEC-Q101 qualification, low leakage (<10 μA at VWM), and thermal resistance of 0.90 °C/W (junction-to-case).
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive electronics, activating only during overvoltage transients exceeding its VBR threshold. Its passivated anisotropic rectifier technology ensures stable performance across -55 °C to +175 °C and enables reliable operation under repeated load dump stress.
The device delivers 6600 W surge capability with 10/1000 μs waveform and maintains ≤1.8 V forward voltage at 100 A, supporting robust protection without compromising forward conduction integrity during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 28.9 V / 31.9 V - Breakdown voltage range at 5.0 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 42.1 V - Clamping voltage at 157 A peak pulse current; limits downstream voltage stress |
| PPPM (10/1000 μs) | 6600 W - Peak pulse power handling capacity per ISO7637-2 load dump waveform |
| TJ max. | +175 °C - Maximum junction temperature; enables underhood placement without derating |
| RθJC | 0.90 °C/W - Thermal resistance from junction to case; supports high-power dissipation on heatsinked PCB pads |
| ID @ VWM | <10 μA - Reverse leakage at rated stand-off voltage; minimizes standby power loss |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads; meets UL 94 V-0, MSL Level 1, and JESD201 Class 2 whisker requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected circuit's positive rail; primary current entry point during clamping |
| Lead 2 / Metal Heatsink | Cathode | Electrically connected to PCB ground plane; serves as thermal path and current return |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage over lifetime and temperature |
| ISO7637-2 compliance | Rated for 24 V system load dump transients (test condition dependent); no external conditioning required |
| DO-218AB thermal design | Integrated metal heatsink enables direct PCB copper pour attachment for RθJC = 0.90 °C/W |
| Uni-directional polarity | Protects against positive-going transients only; avoids unintended conduction during normal reverse-biased operation |
Applications
| Automotive Load Dump Protection | Industrial 24 V DC Power Rail |
|---|---|
Use Scenario: Protecting ECUs, body control modules, and infotainment systems from alternator-induced load dump spikes in 24 V commercial vehicles. IC Role / Device Role / Timing Role: Parallel-connected clamping TVS that diverts >150 A surge current away from downstream ICs and MOSFETs. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or gate oxide damage in 36 V-rated components. | Use Scenario: Safeguarding programmable logic controllers (PLCs) and industrial HMIs powered from regulated 24 V supplies subject to inductive switching noise. IC Role / Device Role / Timing Role: Standby overvoltage clamp activated only during rare >30 V events; zero impact on normal operation. Use Value: Maintains <10 μA leakage at 26 V, eliminating standby current error in precision analog sensor front-ends. |
| Truck & Bus Battery Management | Off-Highway Equipment Power Systems |
Use Scenario: Securing battery monitoring ICs and CAN transceivers in heavy-duty vehicle BMS during cold-cranking and jump-start recovery. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp placed directly at connector entry point. Use Value: Withstands 700 A non-repetitive surge (IFSM), surviving multiple cranking events without degradation. | Use Scenario: Protecting motor drive controllers in construction and agricultural machinery exposed to long cable runs and relay coil kickback. IC Role / Device Role / Timing Role: High-energy (6600 W) transient absorber mounted on heatsinked PCB pad near power input stage. Use Value: Achieves 0.90 °C/W thermal resistance, enabling sustained operation at +125 °C ambient without derating. |
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 vs. 6600 W); SMA package; VBR 28.9–32.0 V; RθJA-limited thermal performance | Suitable for low-energy ESD or board-level surges; not rated for ISO7637-2 load dump | Select when cost or footprint is critical and surge energy remains below 400 W |
| TPSMA6L26A | Same VWM/VBR range; 600 W PPPM; SOD-123FL package; higher RθJA; no AEC-Q101 qualification | Applicable for consumer or industrial non-automotive 24 V rails where qualification is not mandated | Choose for space-constrained designs where automotive qualification is unnecessary |
Compared with SMAJ26A-E3/5AT and TPSMA6L26A, the SM8S26A-001HE3/2D provides 16× higher surge power, DO-218AB thermal performance optimized for heatsinking, and full AEC-Q101 validation-making it the sole option for underhood automotive load dump compliance.
Availability
SM8S26A-001HE3/2D is available at Aetrix Electronics and suitable for automotive electronic control units, industrial 24 V power distribution systems, and off-highway equipment requiring stable component supply with guaranteed long-term availability.
Supply support for SM8S26A-001HE3/2D 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, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The SM8SxxA series is engineered specifically for high-energy automotive load dump protection, combining high-temperature junction capability (175 °C), ultra-low thermal resistance, and AEC-Q101 validation for underhood deployment.
FAQ
What is the clamping voltage of the SM8S26A-001HE3/2D at its rated peak pulse current?
The SM8S26A-001HE3/2D has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 157 A under the 10/1000 μs waveform. This value is measured per standard test conditions (TC = 25 °C) and ensures downstream components see no more than 42.1 V during worst-case transient events. The SM8S26A-001HE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM8S26A-001HE3/2D qualified for automotive applications?
Yes, the SM8S26A-001HE3/2D is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 surge requirements for 24 V systems and operates reliably from -55 °C to +175 °C junction temperature. Its DO-218AB package passes MSL Level 1 and JESD201 Class 2 whisker testing-key requirements for underhood electronics. The SM8S26A-001HE3/2D carries the HE3 suffix denoting RoHS compliance and AEC-Q101 qualification.
What does the "-001" in SM8S26A-001HE3/2D indicate?
The "-001" suffix in SM8S26A-001HE3/2D is a Vishay internal revision code indicating a specific manufacturing lot or process iteration compliant with the base SM8S26A specifications. It does not alter electrical parameters, package dimensions, or qualification status. All SM8S26A-001HE3/2D units meet the same VWM = 26.0 V, VBR = 28.9–31.9 V, and PPPM = 6600 W specs defined in Document Number 88387. The SM8S26A-001HE3/2D remains fully interchangeable with other SM8S26AHE3/2D variants.
Can the SM8S26A-001HE3/2D be used in bidirectional configurations?
No, the SM8S26A-001HE3/2D is unidirectional only, with anode (Lead 1) and cathode (Lead 2/metal heatsink) terminals clearly defined. It protects against positive-going transients on the anode side relative to cathode. For bidirectional protection, two devices must be connected in series opposition or a dedicated bidirectional TVS (e.g., SMBJ26CA) must be selected. The SM8S26A-001HE3/2D datasheet explicitly states "Available in uni-directional polarity only."
What is the thermal resistance and recommended mounting for optimal performance of the SM8S26A-001HE3/2D?
The SM8S26A-001HE3/2D has a typical junction-to-case thermal resistance (RθJC) of 0.90 °C/W. To achieve this, the metal heatsink (Lead 2) must be soldered to a minimum 100 mm² copper pad (2 oz Cu) with ≥4 thermal vias to inner ground planes. The SM8S26A-001HE3/2D mounting pad layout is specified in the DO-218AB outline drawing (Document 88387, page 4). Proper heatsinking prevents thermal runaway during repetitive 6600 W surges.
SM8S26A-001HE3/2D 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:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 157A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S26A-001HE3/2D FAQ
1.How can I place an order for SM8S26A-001HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S26A-001HE3/2D 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 SM8S26A-001HE3/2D reliable?
The price and inventory of SM8S26A-001HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S26A-001HE3/2D is usually 5 days.
3.What payment methods are accepted for SM8S26A-001HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S26A-001HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S26A-001HE3/2D?
SM8S26A-001HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S26A-001HE3/2D 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 SM8S26A-001HE3/2D?
For technical support, including SM8S26A-001HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S26A-001HE3/2D requirements.
6.How does Aetrix verify that SM8S26A-001HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S26A-001HE3/2D 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 SM8S26A-001HE3/2D meets industry standards.
7.What is the process for return or replacement of SM8S26A-001HE3/2D?
All SM8S26A-001HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S26A-001HE3/2D, 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 SM8S26A-001HE3/2D part is unused and in its original packaging.
Return procedure for SM8S26A-001HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S26A-001HE3/2D Tags
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