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Vishay General Semiconductor - Diodes Division SM8S26A-7001HE4/2N
- Part No.:
- SM8S26A-7001HE4/2N
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S26A-7001HE4/2N.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,010
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Product details
Overview
SM8S26A-7001HE4/2N from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 26.0 V stand-off voltage (VWM), 28.9–31.9 V breakdown (VBR), 42.1 V clamping at 157 A peak pulse current (10/1000 μs), and 6600 W peak pulse power. It delivers automotive-grade protection against load dump transients in 12 V/24 V systems.
For engineers reviewing the SM8S26A-7001HE4/2N datasheet, SM8S26A-7001HE4/2N pinout, SM8S26A-7001HE4/2N application, or SM8S26A-7001HE4/2N equivalent, key selection criteria include AEC-Q101 qualification, TJ = 175 °C operation, ISO7637-2 compliance, low leakage (<10 μA at VWM), and heatsink-anode polarity configuration.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and surge robustness. Its unidirectional architecture enables forward conduction during overvoltage events while maintaining low leakage (<10 μA) at 26.0 V stand-off and 175 °C junction temperature.
The device achieves 6600 W peak pulse power handling with 10/1000 μs waveform and meets MSL Level 1 per J-STD-020. Thermal resistance is 0.90 °C/W (junction-to-case), enabling high-power dissipation when mounted on a heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.0 V - Maximum reverse voltage before clamping begins; defines system operating margin in 24 V automotive circuits. |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 5 mA test current; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 42.1 V - Clamping voltage at 157 A peak pulse; limits downstream voltage stress during ISO7637-2 load dump events. |
| PPPM (10/1000 μs) | 6600 W - Peak pulse power capability; supports high-energy transients without failure in engine control units. |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood deployment in automotive powertrain and body electronics. |
| Polarity | Unidirectional - Anode connected to heatsink; requires correct PCB layout orientation for forward-biased clamping. |
| Leakage ID | <10 μA at VWM, 175 °C - Ensures minimal standby current drain in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - Surface-mount, single-heatsink case with matte tin-plated leads; anode terminal bonded to metal heatsink base (Lead 2), cathode at Lead 1; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries transient current into device during clamping. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical connection point; must be soldered to copper pour for thermal management and circuit reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use across temperature, humidity, and mechanical stress tests per JESD22 standards. |
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR and low leakage up to 175 °C junction temperature. |
| ISO7637-2 compliance | Withstands load dump surges up to 6600 W (10/1000 μs) without degradation-critical for alternator-induced transients. |
| MSL Level 1 | Rated for reflow peak of 245 °C; supports standard lead-free SMT assembly without moisture sensitivity concerns. |
| Low VF | ≤1.8 V at 100 A (8.3 ms half-sine); minimizes forward conduction loss during sustained overvoltage conditions. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection against alternator load dump transients during battery disconnection in gasoline/diesel powertrain systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamps 12 V rail to ≤42.1 V during 6600 W surge events, safeguarding microcontrollers and CAN transceivers. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic rails by limiting transient overvoltage within safe SOA boundaries. |
Use Scenario: Surge suppression on LIN bus power lines and interior lighting drivers exposed to switching noise from motors and relays. IC Role / Device Role / Timing Role: Fast-response clamping element placed at power entry point to absorb repetitive 100–500 W spikes from window lifters or seat adjusters. Use Value: Maintains <10 μA leakage at 26 V to avoid battery drain in sleep-mode BCMs while surviving 150+ cycles of 157 A pulses. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
Use Scenario: Input rail protection for radar sensor power supplies subjected to ESD and conducted transients in front-end vehicle harnesses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V/12 V supply rails feeding high-speed ADCs and RF front-ends. Use Value: Delivers 42.1 V clamping with 0.90 °C/W RθJC to sustain operation at 125 °C ambient without derating in compact sensor housings. |
Use Scenario: Protection of motor driver ICs and gate drivers against inductive kickback from 3-phase BLDC steering motors. IC Role / Device Role / Timing Role: High-current TVS placed between H-bridge output and ground plane to shunt flyback energy during PWM commutation. Use Value: Handles 700 A IFSM non-repetitive surge and 157 A IPPM without bond wire fusing, ensuring functional safety integrity per ISO 26262 ASIL-B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57T | DO-214AC package; lower PPPM (400 W); VBR 28.9–31.9 V; same VWM (26 V); no AEC-Q101 qualification. | Limited to industrial/commercial environments; unsuitable for under-hood automotive due to 150 °C TJ max and no ISO7637-2 validation. | Select only for cost-sensitive non-automotive designs where 6600 W surge immunity is not required. |
| TPSMD26A | DO-218AB package; identical VWM/VBR/VC specs; AEC-Q101 qualified; but higher leakage (25 μA at VWM, 25 °C). | Acceptable for most automotive applications, though elevated leakage may impact ultra-low-power sleep modes in telematics modules. | Prefer when second-source availability is critical; verify leakage impact in always-on battery monitoring circuits. |
Compared with SMAJ26A-E3/57T and TPSMD26A, the SM8S26A-7001HE4/2N uniquely combines 6600 W surge rating, 175 °C operation, and AEC-Q101 qualification in DO-218AB-enabling single-device compliance with stringent automotive load dump and thermal requirements without derating.
Availability
SM8S26A-7001HE4/2N is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS sensor protection, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for SM8S26A-7001HE4/2N 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, high-temperature performance, and automotive qualification.
The SM8SxxA series targets automotive load dump protection, delivering high-power transient suppression in DO-218AB with AEC-Q101 validation and 175 °C junction capability for under-hood deployment.
FAQ
What is the maximum clamping voltage of the SM8S26A-7001HE4/2N at its rated peak pulse current?
The SM8S26A-7001HE4/2N has a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPPM) of 157 A using the 10/1000 μs waveform. This value is measured per the test conditions defined in the Vishay datasheet (Document Number: 88387) and represents the upper limit of voltage seen by downstream circuitry during a standardized surge event. The SM8S26A-7001HE4/2N maintains this clamping performance across its full operating temperature range.
Is the SM8S26A-7001HE4/2N qualified for automotive applications?
Yes, the SM8S26A-7001HE4/2N is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 surge requirements for load dump protection and is rated for continuous operation at junction temperatures up to +175 °C. The DO-218AB package is MSL Level 1 compliant, supporting lead-free reflow assembly. These qualifications make the SM8S26A-7001HE4/2N suitable for engine control units, body control modules, and ADAS systems.
What does the "HE4/2N" suffix indicate in SM8S26A-7001HE4/2N?
The "HE4/2N" suffix in SM8S26A-7001HE4/2N denotes the packaging and reel configuration: "HE4" specifies RoHS-compliant, AEC-Q101-qualified construction with matte tin plating and JESD201 Class 2 whisker resistance; "2N" indicates 750-unit quantity in 13-inch plastic tape-and-reel format with anode oriented toward the sprocket hole. This matches the ordering convention defined in the Vishay datasheet for the SM8SxxA family.
How does the thermal performance of the SM8S26A-7001HE4/2N compare to standard SMAJ devices?
The SM8S26A-7001HE4/2N features a typical junction-to-case thermal resistance (RθJC) of 0.90 °C/W, significantly lower than SMAJ-series devices (typically >30 °C/W). This enables efficient heat transfer to a PCB copper pour or external heatsink, sustaining higher power dissipation-up to 6600 W peak-without thermal runaway. In contrast, SMAJ26A's higher RθJC limits its usable surge energy in thermally constrained layouts.
Can the SM8S26A-7001HE4/2N replace older SM8S26A variants like HE3/2D?
Yes, the SM8S26A-7001HE4/2N is a direct replacement for SM8S26A-HE3/2D in new designs, sharing identical electrical specifications (VWM = 26.0 V, VBR = 28.9–31.9 V, VC = 42.1 V), DO-218AB package, and AEC-Q101 qualification. The HE4/2N variant offers enhanced process control and updated whisker resistance (JESD201 Class 2), but maintains full form-fit-function compatibility with prior HE3-suffixed versions of the SM8S26A-7001HE4/2N.
SM8S26A-7001HE4/2N 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-7001HE4/2N FAQ
1.How can I place an order for SM8S26A-7001HE4/2N through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S26A-7001HE4/2N 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-7001HE4/2N reliable?
The price and inventory of SM8S26A-7001HE4/2N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S26A-7001HE4/2N is usually 5 days.
3.What payment methods are accepted for SM8S26A-7001HE4/2N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S26A-7001HE4/2N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S26A-7001HE4/2N?
SM8S26A-7001HE4/2N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S26A-7001HE4/2N 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-7001HE4/2N?
For technical support, including SM8S26A-7001HE4/2N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S26A-7001HE4/2N requirements.
6.How does Aetrix verify that SM8S26A-7001HE4/2N is sourced from the original manufacturer or authorized distributors?
All SM8S26A-7001HE4/2N 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-7001HE4/2N meets industry standards.
7.What is the process for return or replacement of SM8S26A-7001HE4/2N?
All SM8S26A-7001HE4/2N units undergo pre-shipment inspection (PSI). If there is an issue with SM8S26A-7001HE4/2N, 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-7001HE4/2N part is unused and in its original packaging.
Return procedure for SM8S26A-7001HE4/2N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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