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Vishay General Semiconductor - Diodes Division SM8S36A-E3/2D
- Part No.:
- SM8S36A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36A-E3/2D.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,989
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Product details
Overview
SM8S36A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® Transient Voltage Suppressor designed for automotive load dump protection. It features a 36 V stand-off voltage (VWM), 58.1 V maximum clamping voltage (VC) at 114 A peak pulse current, 6600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM8S36A-E3/2D datasheet, SM8S36A-E3/2D pinout, SM8S36A-E3/2D application, or SM8S36A-E3/2D equivalent, key selection criteria include its DO-218AB package thermal performance (RθJC = 0.90 °C/W), 175 °C junction temperature rating, and compliance with ISO7637-2 load dump surge requirements.
Technical Context
The SM8S36A-E3/2D employs passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage (<10 µA at VWM). Its unidirectional polarity configures the metal heatsink as the anode, enabling direct thermal coupling to PCB copper planes.
It delivers 6600 W surge capability under 10/1000 µs waveform and sustains 5200 W under longer 10/10,000 µs transients - critical for automotive load dump immunity. The device operates across -55 °C to +175 °C and meets MSL Level 1 reflow compatibility (245 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage threshold. |
| VC @ IPPM | 58.1 V - Clamped voltage at 114 A peak pulse current; defines worst-case voltage seen by protected downstream ICs. |
| PPPM (10/1000 µs) | 6600 W - Peak transient energy absorption capacity; enables single-device protection against severe ISO7637-2 Pulse 5a events. |
| TJ max. | +175 °C - Maximum junction temperature; supports placement near high-power components in engine control units. |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; allows precise thermal design when mounted on copper heatsink pads. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, and HAST; required for powertrain and body control modules. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with integral metal heatsink (anode) and lead 1 (cathode); UL 94 V-0 rated; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit's positive rail; carries full surge current during clamping. |
| Metal Heatsink | Anode | Electrically and thermally connected to ground plane; must be soldered to ≥100 mm² copper area for thermal derating compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional configuration | Enables robust forward-biased clamping for DC-biased automotive rails without reverse conduction path concerns. |
| Low leakage at VWM | <10 µA at 36 V and 25 °C - minimizes standby power loss in always-on vehicle networks (e.g., CAN wake-up circuits). |
| High surge current rating | 114 A (10/1000 µs) - withstands repeated load dump events without parametric shift or degradation. |
| Junction passivation | Optimized anisotropic rectifier process - ensures stable VBR and VC across temperature and lifetime. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Interface |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and sensors from 12 V battery line transients during alternator load dump. IC Role / Device Role / Timing Role: Primary clamping device on main 12 V input rail; responds within nanoseconds to suppress >40 V surges. Use Value: Limits voltage to ≤58.1 V during 6600 W transients, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. |
Use Scenario: Shields BCM power management ICs and LIN transceivers from jump-start and battery-reversal induced spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC converter input. Use Value: Maintains <10 µA leakage at 36 V stand-off, avoiding unnecessary drain on vehicle battery during sleep mode. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards image sensor and ISP power rails in rear-view or surround-view cameras exposed to harsh under-hood environments. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary DC-DC stage; handles localized switching noise and ESD. Use Value: 175 °C rated junction enables reliable operation adjacent to heat-generating image processors without thermal derating penalties. |
Use Scenario: Protects gate drivers and current sense amplifiers in EPS H-bridge controllers from inductive kickback during motor commutation. IC Role / Device Role / Timing Role: Fast-response TVS on low-side driver supply rail; clamps sub-100 ns transients. Use Value: 0.90 °C/W RθJC allows direct mounting to motor driver heatsink, sustaining 8 W continuous dissipation without external cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5AT | Lower PPPM (400 W), SMA package, RθJC ≈ 45 °C/W, no AEC-Q101 qualification | Not suitable for automotive load dump; limited to low-energy board-level ESD protection | Select only for cost-sensitive consumer electronics where 6600 W surge immunity is unnecessary. |
| TPSMD36CA | Bidirectional configuration, same VWM/VC, but higher leakage (50 µA), not AEC-Q101 qualified | Lacks unidirectional optimization for DC-biased rails; unsuitable for primary battery line protection | Consider only for AC-coupled signal lines or non-automotive industrial controls requiring bidirectional clamping. |
Compared with SMAJ36A-E3/5AT and TPSMD36CA, the SM8S36A-E3/2D uniquely combines AEC-Q101 qualification, DO-218AB thermal performance, and 6600 W surge rating - making it the only viable option for front-end protection in ISO7637-2-compliant automotive ECUs.
Availability
SM8S36A-E3/2D is available at Aetrix Electronics and suitable for automotive powertrain systems, ADAS camera modules, and electric power steering controllers requiring stable component supply across extended product lifecycles.
Supply support for SM8S36A-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, emphasizing high-temperature operation, surge robustness, and AEC-Q101 compliance - targeting engine control, body electronics, and safety-critical subsystems.
FAQ
What is the clamping voltage of the SM8S36A-E3/2D at its rated peak pulse current?
The SM8S36A-E3/2D has a maximum clamping voltage (VC) of 58.1 V at its specified peak pulse current (IPPM) of 114 A under a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88387) and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The SM8S36A-E3/2D maintains this clamping performance across its full operating temperature range.
Is the SM8S36A-E3/2D suitable for bidirectional transient suppression?
No, the SM8S36A-E3/2D is a unidirectional TVS diode - its metal heatsink serves as the anode and lead 1 as the cathode, supporting clamping only on positively biased transients. It is not rated for reverse surge handling beyond its specified VWM. For bidirectional protection, a dedicated bidirectional part such as the SM8S36CA would be required. The SM8S36A-E3/2D is intentionally designed for DC-biased automotive power rails.
What does the "-E3/2D" suffix indicate in SM8S36A-E3/2D?
The "-E3" suffix denotes RoHS-compliant, matte tin-plated leads meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance. The "/2D" indicates packaging in 13-inch plastic tape and reel, with 750 units per reel and anode orientation toward the sprocket hole. This configuration ensures automated placement compatibility and traceable, compliant sourcing for the SM8S36A-E3/2D.
How does the SM8S36A-E3/2D meet ISO7637-2 compliance?
The SM8S36A-E3/2D meets ISO7637-2 surge requirements - specifically Pulse 5a (load dump) - due to its 6600 W peak pulse power rating (10/1000 µs) and ability to clamp at 58.1 V while conducting 114 A. Its DO-218AB package provides low thermal resistance (0.90 °C/W), enabling sustained energy dissipation without thermal runaway. Vishay explicitly states this compliance in the SM8S10–SM8S43A datasheet (Rev. 14-Sep-11).
Can the SM8S36A-E3/2D replace the SM8S36AHE3/2D?
Yes - SM8S36A-E3/2D and SM8S36AHE3/2D are identical in electrical and mechanical specifications. The "H" in SM8S36AHE3/2D is a legacy prefix denoting the same RoHS-compliant, AEC-Q101-qualified device; Vishay documentation confirms both part numbers refer to the same DO-218AB packaged SM8S36A variant. No design or layout changes are needed when substituting SM8S36A-E3/2D for SM8S36AHE3/2D.
SM8S36A-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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 114A
- 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
SM8S36A-E3/2D FAQ
1.How can I place an order for SM8S36A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36A-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 SM8S36A-E3/2D reliable?
The price and inventory of SM8S36A-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 SM8S36A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S36A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36A-E3/2D?
SM8S36A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36A-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 SM8S36A-E3/2D?
For technical support, including SM8S36A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36A-E3/2D requirements.
6.How does Aetrix verify that SM8S36A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S36A-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 SM8S36A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S36A-E3/2D?
All SM8S36A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36A-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 SM8S36A-E3/2D part is unused and in its original packaging.
Return procedure for SM8S36A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36A-E3/2D Tags
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