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Vishay General Semiconductor - Diodes Division SM8S36-7000HE3/2D
- Part No.:
- SM8S36-7000HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36-7000HE3/2D.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,112
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Product details
Overview
SM8S36-7000HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 36 V stand-off voltage (VWM), 40.0–48.9 V breakdown range (VBR), 6600 W peak pulse power (10/1000 µs), 103 A peak pulse current, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM8S36-7000HE3/2D datasheet, SM8S36-7000HE3/2D pinout, SM8S36-7000HE3/2D application, or SM8S36-7000HE3/2D equivalent, key selection criteria include its DO-218AB package thermal resistance (0.90 °C/W), 175 °C junction rating, uni-directional polarity, and ISO7637-2 compliance for automotive transients.
Technical Context
This TVS diode operates as a clamping device in series with the power rail, conducting only when reverse voltage exceeds VBR to limit transient energy. Its passivated anisotropic rectifier structure enables low leakage (<10 µA at VWM) and low forward voltage drop (≤1.8 V at 100 A), critical for minimizing conduction losses during surge events.
The device is optimized for high-reliability automotive environments: it meets MSL Level 1 (245 °C reflow), passes JESD201 Class 2 whisker testing, and delivers stable clamping performance up to TJ = 175 °C - verified across temperature and pulse duration per ISO7637-2 test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 40.0 V / 48.9 V at 5 mA - ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | 64.3 V - clamped voltage at 103 A peak pulse, defining worst-case rail overvoltage during load dump |
| PPPM (10/1000 µs) | 6600 W - surge energy handling capacity for standard automotive transient waveform |
| RθJC | 0.90 °C/W - enables effective heatsinking to metal tab, supporting high-power dissipation without derating |
| TJ max | 175 °C - qualified for under-hood placement where ambient temperatures exceed 125 °C |
| Polarity | Uni-directional - anode connected to heatsink; requires correct orientation in DC power path |
Pinout & Package
Package: DO-218AB - surface-mount, single-ended case with integral metal heatsink tab (anode). Dimensions: 15.4 × 9.5 × 3.8 mm (L × W × H); matte tin-plated leads; UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit input; carries full surge current during clamping |
| Lead 2 / Metal Heatsink | Anode | Must be soldered to large copper pour or chassis ground for thermal and electrical performance |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable leakage <10 µA at VWM across -55 °C to +175 °C, reducing standby power loss |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics per stress-test requirements |
| ISO7637-2 compliance | Guarantees robustness against 12 V/24 V system load dump transients (Pulse 5a/b) |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity concerns or baking preconditioning |
| Low RθJC (0.90 °C/W) | Allows >8 W steady-state dissipation on infinite heatsink, supporting extended surge duty cycles |
Applications
| Automotive Load Dump Protection | DC-DC Converter Input Protection |
|---|---|
Use Scenario: Protecting engine control units (ECUs) and infotainment systems from 12 V battery line transients during alternator load dump events. IC Role / Device Role / Timing Role: Clamping TVS placed between battery rail and primary DC-DC input, absorbing up to 6600 W surges. Use Value: Limits rail voltage to ≤64.3 V during 103 A pulses, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding isolated buck or flyback converter inputs in vehicle telematics modules exposed to noisy 24 V supply rails. IC Role / Device Role / Timing Role: Fast-response transient suppressor located upstream of input filter capacitors and EMI chokes. Use Value: Maintains system uptime by clamping ISO7637-2 Pulse 5a transients before they degrade MOSFET gate oxides or feedback networks. |
| Industrial Power Supply Surge Suppression | Commercial Vehicle Battery Management |
Use Scenario: Securing programmable logic controller (PLC) power inputs in factory automation equipment subject to inductive switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V auxiliary supply, coordinated with secondary TVS and MOV stages. Use Value: Provides 175 °C operation capability for enclosed enclosures with limited airflow, eliminating thermal derating penalties. | Use Scenario: Protecting BMS front-end analog sensing circuits in heavy-duty truck battery packs during cranking and alternator regulation faults. IC Role / Device Role / Timing Role: Uni-directional TVS mounted directly on PCB near connector entry point, referenced to chassis ground via heatsink tab. Use Value: Leverages DO-218AB's low RθJC to sustain repeated 10/1000 µs surges without thermal runaway in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5AT | Lower PPPM (400 W), SMA package, bidirectional option available | Not rated for AEC-Q101 or ISO7637-2; suitable for industrial/commercial only | Select when cost-sensitive, lower-energy transients, and no automotive qualification required |
| TPSMD36CA | Bi-directional configuration, same DO-218AB package, 6600 W rating | Clamps both positive and negative transients - unsuitable where DC polarity must be preserved | Choose only if bidirectional protection is explicitly needed; otherwise SM8S36-7000HE3/2D offers superior unidirectional efficiency |
Compared with SMAJ36A-E3/5AT and TPSMD36CA, SM8S36-7000HE3/2D uniquely combines AEC-Q101 qualification, ISO7637-2 compliance, and 6600 W unidirectional clamping in DO-218AB - making it the only choice for automotive load dump where polarity integrity and high-reliability validation are mandatory.
Availability
SM8S36-7000HE3/2D is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and commercial vehicle BMS requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SM8S36-7000HE3/2D 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The SM8Sxx family was engineered specifically for automotive load dump and ISO7637-2 transient suppression, emphasizing thermal robustness, AEC-Q101 compliance, and high-power clamping in surface-mount form factors.
FAQ
What is the clamping voltage of SM8S36-7000HE3/2D at its rated peak pulse current?
The SM8S36-7000HE3/2D has a maximum clamping voltage (VC) of 64.3 V at its specified peak pulse current (IPPM) of 103 A under the 10/1000 µs waveform. This value is measured at TC = 25 °C and defines the upper voltage limit imposed on the protected circuit during worst-case surge events. The SM8S36-7000HE3/2D maintains this clamping performance across its full operating temperature range due to its optimized junction passivation.
Is SM8S36-7000HE3/2D qualified for automotive use?
Yes, SM8S36-7000HE3/2D is AEC-Q101 qualified and meets ISO7637-2 surge test requirements for automotive load dump applications. It is rated for operation from -55 °C to +175 °C junction temperature and passes JESD201 Class 2 whisker testing. The SM8S36-7000HE3/2D HE3 suffix confirms RoHS compliance and automotive qualification per Vishay documentation.
What does the "HE3/2D" suffix mean in SM8S36-7000HE3/2D?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101-qualified construction with JESD201 Class 2 whisker resistance. The "/2D" denotes packaging: 13-inch plastic tape and reel, 750 units per reel, with anode oriented toward the sprocket hole. The "7000" in the part number reflects the 6600 W peak pulse power rating (rounded for naming convention). SM8S36-7000HE3/2D is not a typo - it is the official orderable designation.
Can SM8S36-7000HE3/2D replace a bi-directional TVS in an existing design?
No - SM8S36-7000HE3/2D is strictly unidirectional, with the metal heatsink tab serving as the anode. Replacing a bi-directional TVS with SM8S36-7000HE3/2D would leave the circuit unprotected against negative-going transients. For bidirectional protection, consider Vishay's TPSMD36CA. Always verify polarity alignment and transient directionality before substituting SM8S36-7000HE3/2D.
What is the thermal resistance from junction to case for SM8S36-7000HE3/2D?
The SM8S36-7000HE3/2D has a typical thermal resistance (RθJC) of 0.90 °C/W, measured from junction to the metal heatsink tab (anode). This low value enables efficient heat transfer to a PCB copper pour or external heatsink, supporting sustained power dissipation. Proper soldering of the tab to ≥10 cm² of 2 oz copper is required to achieve the rated 8 W power dissipation on infinite heatsink.
SM8S36-7000HE3/2D 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 103A
- 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
SM8S36-7000HE3/2D FAQ
1.How can I place an order for SM8S36-7000HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36-7000HE3/2D 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 SM8S36-7000HE3/2D reliable?
The price and inventory of SM8S36-7000HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36-7000HE3/2D is usually 5 days.
3.What payment methods are accepted for SM8S36-7000HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36-7000HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36-7000HE3/2D?
SM8S36-7000HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36-7000HE3/2D 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 SM8S36-7000HE3/2D?
For technical support, including SM8S36-7000HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36-7000HE3/2D requirements.
6.How does Aetrix verify that SM8S36-7000HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S36-7000HE3/2D 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 SM8S36-7000HE3/2D meets industry standards.
7.What is the process for return or replacement of SM8S36-7000HE3/2D?
All SM8S36-7000HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36-7000HE3/2D, 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 SM8S36-7000HE3/2D part is unused and in its original packaging.
Return procedure for SM8S36-7000HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36-7000HE3/2D Tags
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