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Vishay General Semiconductor - Diodes Division SM8S36-E3/2D
- Part No.:
- SM8S36-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36-E3/2D.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,588
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Product details
Overview
SM8S36-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 12 V/24 V systems. It features a 36 V stand-off voltage (VWM), 64.3 V maximum clamping voltage (VC) at 103 A peak pulse current (IPPM), and 6600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C in the DO-218AB package.
For engineers reviewing the SM8S36-E3/2D datasheet, SM8S36-E3/2D pinout, SM8S36-E3/2D application, or SM8S36-E3/2D equivalent, key selection criteria include clamping performance under ISO 7637-2 load dump transients, AEC-Q101 qualification status, thermal resistance (RθJC = 0.90 °C/W), and compatibility with automated SMT assembly using matte tin-plated leads.
Technical Context
The SM8S36-E3/2D employs passivated anisotropic rectifier technology optimized for junction stability at TJ = 175 °C, enabling sustained operation in under-hood automotive environments. Its unidirectional polarity and heatsink-anode configuration support direct mounting to metal chassis for enhanced thermal dissipation.
It delivers 6600 W peak pulse power (10/1000 μs) and 5200 W (10/10 000 μs), meeting ISO 7637-2 surge requirements for 12 V systems. With 10 μA max reverse leakage at VWM and 1.8 V max forward voltage at 100 A, it ensures low standby loss and robust overvoltage clamping during inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.0 V - Maximum continuous reverse operating voltage before clamping begins; defines system nominal bus voltage compatibility. |
| VC @ IPPM | 64.3 V - Clamped voltage at 103 A peak pulse current; determines protected circuit's maximum transient exposure level. |
| PPPM (10/1000 μs) | 6600 W - Peak surge energy handling capacity; enables compliance with ISO 7637-2 Load Dump Pulse 5a/b test profiles. |
| TJ max. | 175 °C - Maximum junction temperature; supports AEC-Q101 qualification and under-hood placement without derating. |
| RθJC | 0.90 °C/W - Junction-to-case thermal resistance; allows accurate thermal design when mounted on heatsinked PCB copper or chassis. |
| ID @ VWM | 10 μA - Reverse leakage at 36 V; ensures minimal standby current draw in always-on automotive modules. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with integral metal heatsink terminal (anode), UL 94 V-0 rated, MSL Level 1, compatible with 245 °C reflow peak per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected line (e.g., battery rail); carries full transient current during clamping. |
| Lead 2 / Metal Heatsink | Anode | Electrically and thermally connected to chassis ground or heatsink; serves as primary thermal path and return node. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Junction passivation | Optimized anisotropic rectifier structure minimizes parameter drift and leakage increase after 1000+ hours at 175 °C. |
| Low VF at high IF | ≤1.8 V forward voltage at 100 A (8.3 ms half-sine) enables efficient clamping without excessive I²R heating during sustained surges. |
| MSL Level 1 rating | Zero floor life limitation; supports indefinite storage and standard SMT reflow without baking preconditioning. |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects BCM microcontroller power rails from load dump transients generated by alternator field coil de-energization during ignition-off events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input, clamping transients within 1 ns response time. Use Value: Limits voltage to ≤64.3 V during 103 A surges, preventing damage to 40 V-rated input capacitors and LDOs downstream. |
Use Scenario: Shields ECU main 12 V supply against ISO 7637-2 Pulse 5a (35 V, 400 ms) and Pulse 5b (40 V, 150 ms) load dump events. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted directly at connector entry point with heatsinked anode to chassis. Use Value: Absorbs 6600 W peak power without failure, maintaining system uptime and eliminating need for redundant protection stages. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguards 12 V input to image sensor SoC and ISP in rear-view or surround-view cameras exposed to vehicle-level transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS with 36 V VWM selected to avoid false triggering during normal battery ripple (11–14.5 V). Use Value: Provides <10 μA leakage at 36 V, preserving low-power sleep mode integrity while clamping to 64.3 V during surge events. |
Use Scenario: Protects gate driver ICs and high-side MOSFETs in EPS motor control H-bridge from inductive kickback and load dump coupling. IC Role / Device Role / Timing Role: High-surge-capability TVS with 0.90 °C/W RθJC mounted to aluminum heatsink adjacent to power stage. Use Value: Enables thermal design margin of ≥25 °C at 8 W steady-state dissipation, supporting continuous operation at 105 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A (Vishay) | Lower PPPM (400 W vs. 6600 W), SMA package, 5.0 A IFSM, RθJC = 50 °C/W | Not suitable for load dump; limited to ESD and low-energy transients in non-automotive consumer electronics | Select only for cost-sensitive, low-surge applications where AEC-Q101 and DO-218AB thermal performance are not required. |
| TPSMD36CA (Texas Instruments) | Bidirectional configuration, same VWM/VC specs, but lacks AEC-Q101 qualification and DO-218AB thermal capability | Requires redesign for unidirectional use; unsuitable for automotive under-hood deployment due to TJ max = 150 °C | Consider only for industrial control applications with lower ambient temperature and no automotive qualification mandate. |
Compared with SMAJ36A-E3/5A and TPSMD36CA, the SM8S36-E3/2D uniquely combines AEC-Q101 qualification, 175 °C operation, 6600 W surge rating, and DO-218AB thermal performance-making it the only viable option for production automotive load dump protection requiring zero derating at 125 °C ambient.
Availability
SM8S36-E3/2D is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, and ADAS camera power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SM8S36-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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The SM8S series was developed specifically for high-energy automotive load dump protection, targeting replacement of older SMA/SMB-based TVS arrays with superior power density, thermal management, and AEC-Q101 compliance in DO-218AB packaging.
FAQ
What is the clamping voltage of the SM8S36-E3/2D at its rated peak pulse current?
The SM8S36-E3/2D has a maximum clamping voltage (VC) of 64.3 V at its rated peak pulse current (IPPM) of 103 A under a 10/1000 μs waveform. This value is measured per the conditions specified in Vishay document 88387 and defines the upper voltage limit imposed on protected circuits during worst-case transients. The SM8S36-E3/2D maintains this clamping performance across its full operating temperature range up to TJ = 175 °C.
Is the SM8S36-E3/2D qualified for automotive applications?
Yes, the SM8S36-E3/2D is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (document 88387, footnote 1). It undergoes stress testing including high-temperature reverse bias, temperature cycling, and mechanical shock per the AEC-Q101 standard. The SM8S36-E3/2D is intended for under-hood automotive use, with validated operation from –55 °C to +175 °C junction temperature.
What package type does the SM8S36-E3/2D use, and what are its thermal characteristics?
The SM8S36-E3/2D uses the DO-218AB surface-mount package, featuring an integral metal heatsink terminal (anode) for direct thermal coupling to PCB copper or chassis. Its typical junction-to-case thermal resistance (RθJC) is 0.90 °C/W, enabling effective heat transfer during high-power transient events. The SM8S36-E3/2D also meets MSL Level 1 and supports 245 °C peak reflow per J-STD-020.
Does the SM8S36-E3/2D meet ISO 7637-2 surge requirements?
Yes, the SM8S36-E3/2D meets ISO 7637-2 surge specification for load dump protection, as confirmed in the Vishay datasheet (document 88387, Features section). Its 6600 W peak pulse power rating (10/1000 μs) and 5200 W (10/10 000 μs) align with Pulse 5a and 5b test profiles. The SM8S36-E3/2D is specifically characterized for load dump power capability in Figure 2 of the datasheet.
What is the polarity configuration of the SM8S36-E3/2D?
The SM8S36-E3/2D is unidirectional only, with polarity defined such that the metal heatsink terminal is the anode and Lead 1 is the cathode. This configuration is fixed and non-reversible; applying reverse bias beyond VWM will cause clamping. The datasheet explicitly states "Available in uni-directional polarity only" and notes "Polarity: Heatsink is anode." The SM8S36-E3/2D must be oriented accordingly in circuit layout.
SM8S36-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:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 103A
- 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
SM8S36-E3/2D FAQ
1.How can I place an order for SM8S36-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36-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 SM8S36-E3/2D reliable?
The price and inventory of SM8S36-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 SM8S36-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S36-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36-E3/2D?
SM8S36-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36-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 SM8S36-E3/2D?
For technical support, including SM8S36-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36-E3/2D requirements.
6.How does Aetrix verify that SM8S36-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S36-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 SM8S36-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S36-E3/2D?
All SM8S36-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36-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 SM8S36-E3/2D part is unused and in its original packaging.
Return procedure for SM8S36-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36-E3/2D Tags
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