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Vishay General Semiconductor - Diodes Division SM5S36HE3/2D
- Part No.:
- SM5S36HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S36HE3/2D.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,958
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Product details
Overview
SM5S36HE3/2D 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), 64.3 V clamping voltage at 56 A peak pulse current, 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for operation up to TJ = 175 °C in DO-218AB package.
For engineers reviewing the SM5S36HE3/2D datasheet, SM5S36HE3/2D pinout, SM5S36HE3/2D application, or SM5S36HE3/2D equivalent, key selection criteria include unidirectional polarity, 36 V system compatibility, ISO7637-2 surge compliance, low leakage (<10 μA at VWM), and thermal resistance of 1.0 °C/W junction-to-case - critical for under-hood automotive electronics with high ambient temperature constraints.
Technical Context
The SM5S36HE3/2D employs passivated anisotropic rectifier technology optimized for high-temperature stability and reliability. Its unidirectional configuration places the heatsink as the anode, enabling robust forward conduction during load dump events while suppressing reverse transients above VBR.
It delivers 3600 W peak pulse power under 10/1000 μs waveform and sustains 2800 W under longer 10/10 000 μs surges. With a maximum junction temperature of 175 °C and MSL Level 1 rating (245 °C reflow peak), it supports automated SMT assembly and long-term operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.0 V - Maximum continuous reverse operating voltage before clamping begins; defines system bus voltage compatibility. |
| VBR (min/max) | 40.0 V / 48.9 V - Breakdown occurs within this range at 5 mA test current; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 64.3 V - Clamping voltage at 56 A peak pulse current; limits downstream IC stress during load dump transients. |
| PPPM (10/1000 μs) | 3600 W - Peak surge energy handling capability; meets ISO7637-2 Pulse 5a requirements for 12 V systems. |
| TJ max. | 175 °C - Maximum junction temperature; enables placement near hot engine compartments without derating. |
| RθJC | 1.0 °C/W - Thermal resistance from junction to case; allows efficient heat transfer to PCB copper or heatsink. |
| Polarity | Unidirectional - Anode connected to heatsink; provides forward conduction path during positive overvoltage events. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink tab (anode), matte tin-plated leads, UL 94 V-0 molding compound, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries clamped transient current to ground or return path. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical connection point; must be soldered to large copper area for thermal management and correct polarity orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Junction passivation | Optimized anisotropic rectifier structure minimizes leakage drift and improves long-term stability at 175 °C. |
| Low VF at high IFSM | Max 2.0 V forward voltage at 100 A surge ensures minimal power loss and heating during repetitive load dump events. |
| MSL Level 1 | Rated for reflow up to 245 °C peak; eliminates moisture sensitivity concerns and simplifies board assembly planning. |
| ISO7637-2 compliance | Validated against Pulse 5a (load dump) with exponential waveform; supports direct integration into automotive power supply rails. |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Protection |
|---|---|
Use Scenario: Protects microcontroller, CAN transceivers, and analog sensors from 12 V battery line transients during alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps voltage spikes to ≤64.3 V within nanoseconds. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and analog front-ends by limiting overvoltage exposure below absolute maximum ratings. | Use Scenario: Shields lighting drivers, window motor controllers, and door lock actuators from switching-induced surges on shared vehicle battery lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on BCM main 12 V input; coordinates with upstream fuses and downstream LC filters. Use Value: Enables reliable operation across -40 °C to +125 °C ambient with no performance degradation due to its 175 °C TJ rating and stable VBR over temperature. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Supply | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Safeguards image sensor and ISP power rails in rear-view or surround-view cameras exposed to engine bay EMI and load dump. IC Role / Device Role / Timing Role: Fast-response TVS on 5 V or 3.3 V LDO input; activated before internal regulator overvoltage protection triggers. Use Value: Maintains uninterrupted video stream during transient events by preventing brown-out or reset caused by rail collapse after clamping. | Use Scenario: Protects gate drivers and current-sense amplifiers in EPS H-bridge circuits from inductive kickback and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional SM5S36HE3/2D handles forward surge while reverse blocking avoids leakage path. Use Value: Reduces system-level failure rate in safety-critical steering functions by meeting ASIL-B compatible surge immunity requirements per ISO 16750-2. |
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 | Lower PPPM (400 W vs. 3600 W); SMA package (DO-214AC); higher RθJA; not AEC-Q101 qualified. | Suitable for non-automotive industrial or consumer applications with lower surge energy requirements. | Select when cost sensitivity outweighs automotive qualification and high-energy surge needs. |
| TPSMD36CA | Bidirectional configuration; same VWM/VBR but symmetric clamping; slightly higher VC (69.4 V); also AEC-Q101 qualified. | Required where both positive and negative transients occur (e.g., CAN bus lines or dual-rail supplies). | Choose only if bidirectional protection is mandated; otherwise SM5S36HE3/2D offers superior unidirectional surge margin and thermal performance. |
Compared with SMAJ36A-E3/5A and TPSMD36CA, the SM5S36HE3/2D delivers 9× higher peak pulse power in a thermally superior DO-218AB package, supports full automotive qualification, and provides optimal unidirectional clamping for 12 V battery rail protection - making it the preferred choice for load dump–critical ECU and BCM designs.
Availability
SM5S36HE3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for SM5S36HE3/2D 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SM5S series is part of Vishay's PAR® (Passivated Anisotropic Rectifier) TVS family, engineered specifically for high-energy automotive load dump protection with extended temperature capability and industry-leading surge robustness.
FAQ
What is the clamping voltage of the SM5S36HE3/2D at its rated peak pulse current?
The SM5S36HE3/2D has a maximum clamping voltage (VC) of 64.3 V at 56 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per standard test methods in the Vishay datasheet (Doc. #88382) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SM5S36HE3/2D maintains this clamping performance consistently across its qualified temperature range.
Is the SM5S36HE3/2D suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the SM5S36HE3/2D is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet (Revision 22-Jul-16, Doc. #88382). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing to meet automotive reliability standards. The SM5S36HE3/2D is intended for use in engine control units, body control modules, and other automotive subsystems where qualification is mandatory.
What package type does the SM5S36HE3/2D use, and how does it impact thermal performance?
The SM5S36HE3/2D uses the DO-218AB surface-mount package, which features an integrated metal heatsink tab serving as the anode terminal. This design achieves a typical junction-to-case thermal resistance (RθJC) of 1.0 °C/W - significantly lower than standard SMA or SMB packages. The SM5S36HE3/2D leverages this thermal advantage to sustain 3600 W surges without exceeding its 175 °C maximum junction temperature when properly mounted to adequate PCB copper area.
Does the SM5S36HE3/2D meet ISO7637-2 surge test requirements?
Yes, the SM5S36HE3/2D meets ISO7637-2 surge specification requirements, specifically Pulse 5a (load dump), as stated in the Vishay datasheet. Its 3600 W peak pulse power rating under 10/1000 μs waveform and validated performance up to 175 °C junction temperature ensure compliance under defined test conditions. The SM5S36HE3/2D is widely deployed in automotive power supply designs targeting ISO7637-2 certification.
What is the polarity configuration of the SM5S36HE3/2D, and how should it be oriented on the PCB?
The SM5S36HE3/2D is unidirectional, with the metal heatsink tab designated as the anode and Lead 1 as the cathode. Per the datasheet, correct orientation requires connecting the heatsink (anode) to the positive side of the protected circuit - typically the battery rail - and Lead 1 (cathode) to ground or the filtered output. Reversing polarity will prevent proper clamping and may cause device failure. The SM5S36HE3/2D's polarity is fixed and cannot be used in bidirectional configurations.
SM5S36HE3/2D 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):
- 56A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
SM5S36HE3/2D FAQ
1.How can I place an order for SM5S36HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S36HE3/2D 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 SM5S36HE3/2D reliable?
The price and inventory of SM5S36HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S36HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S36HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S36HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S36HE3/2D?
SM5S36HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S36HE3/2D 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 SM5S36HE3/2D?
For technical support, including SM5S36HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S36HE3/2D requirements.
6.How does Aetrix verify that SM5S36HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S36HE3/2D 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 SM5S36HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S36HE3/2D?
All SM5S36HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S36HE3/2D, 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 SM5S36HE3/2D part is unused and in its original packaging.
Return procedure for SM5S36HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S36HE3/2D Tags
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