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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Vishay General Semiconductor - Diodes Division SM8S36-2HE3/I

Name: SM8S36-2HE3/I
Brand: Vishay General Semiconductor - Diodes Division
SKU: SM8S36-2HE3/I
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SM8S36-2HE3/I

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-218AB

Datasheet:: SM8S36-2HE3/I.pdf

Description:: TVS DIODE 36VWM 64.3VC DO218AB

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Product details

Overview

SM8S36-2HE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 24 V systems. It features a 36.0 V stand-off voltage (V_WM), 40.0–48.9 V breakdown range (V_BR), 64.3 V clamping voltage at 103 A peak pulse current (10/1000 µs), and 6600 W peak pulse power dissipation. Its DO-218AB package supports high-reliability underhood applications up to T_J = 175 °C.

For engineers reviewing the SM8S36-2HE3/I datasheet, SM8S36-2HE3/I pinout, SM8S36-2HE3/I application, or SM8S36-2HE3/I equivalent, key selection criteria include its AEC-Q101 qualification, ISO7637-2 compliance for load dump transients, low leakage (<10 µA at V_WM), and thermal resistance of 0.90 °C/W (junction-to-case).

Technical Context

This TVS diode operates exclusively in unidirectional mode with the heatsink serving as the anode terminal. Its junction passivation and anisotropic rectifier technology enable stable performance at 175 °C junction temperature and low forward voltage drop (≤1.8 V at 100 A).

The device delivers 6600 W surge capability under 10/1000 µs waveform and 5200 W under 10/10 000 µs, meeting stringent automotive load dump requirements. Its MSL Level 1 rating and JESD201 Class 2 whisker resistance confirm suitability for high-volume automated assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	36.0 V - Maximum reverse operating voltage before clamping begins; defines system nominal bus voltage compatibility (24 V automotive).
V_BR min/max	40.0 V / 48.9 V - Breakdown voltage range at 5 mA test current; ensures reliable turn-on margin above V_WM.
V_C @ I_PPM	64.3 V - Clamping voltage at 103 A peak pulse current (10/1000 µs); limits downstream component stress during load dump events.
P_PPM (10/1000 µs)	6600 W - Peak pulse power handling capacity; enables single-device protection against ISO7637-2 Pulse 5a/b transients.
T_J max	175 °C - Maximum junction temperature; supports underhood placement without derating in high-ambient environments.
R_θJC	0.90 °C/W - Junction-to-case thermal resistance; allows direct mounting to PCB copper pour or metal chassis for effective heat dissipation.
I_FSM	700 A - Non-repetitive forward surge current (8.3 ms half-sine); withstands high-energy inrush or short-circuit faults.

Pinout & Package

Package: DO-218AB - Surface-mount, dual-terminal, anode-heatsink configuration with matte tin-plated leads. Meets UL 94 V-0 flammability rating and J-STD-002/JESD22-B102 solderability standards. HE3 suffix indicates RoHS compliance and JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Lead 1	Cathode	Connected to protected circuit node; carries transient current into the device during overvoltage events.
Lead 2 / Metal Heatsink	Anode	Primary thermal path and electrical return; must be soldered to large copper area or chassis for thermal management and low-inductance grounding.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards.
ISO7637-2 compliant	Withstands Pulse 5a (load dump) transients up to 100 V/100 ms without degradation when properly mounted.
Low leakage current	<10 µA at 36 V (T_A = 25 °C) and <150 µA at 36 V (T_J = 175 °C); minimizes standby power loss in always-on vehicle modules.
High surge capability	6600 W (10/1000 µs) and 5200 W (10/10 000 µs); eliminates need for parallel TVS devices in most 24 V load dump designs.
MSL Level 1	Unlimited floor life at ≤30 °C/85 % RH; compatible with standard SMT reflow profiles up to 245 °C peak.

Applications

Engine Control Unit (ECU) Power Input Protection	Body Control Module (BCM) Battery Interface
Use Scenario: Protects 24 V input rails of engine control units against alternator load dump transients during battery disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and DC-DC converter input. Use Value: Limits transient voltage to ≤64.3 V, preventing damage to downstream PMICs and microcontrollers rated for 40 V absolute maximum.	Use Scenario: Shields BCM power inputs from load dump and jump-start surges in commercial vehicle body electronics. IC Role / Device Role / Timing Role: Primary overvoltage protection on main 24 V supply rail upstream of fuse and LDO regulators. Use Value: Withstands 700 A surge current (8.3 ms) and maintains <10 µA leakage at 36 V, enabling low-power sleep-mode operation.
ADAS Camera Power Supply Protection	Commercial Truck Telematics Unit
Use Scenario: Safeguards image sensor and ISP power domains in rear-view and surround-view cameras exposed to harsh underhood conditions. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector entry point on camera PCB. Use Value: 175 °C junction rating and 0.90 °C/W R_θJC allow direct heatsink mounting, ensuring stable clamping performance at elevated ambient temperatures.	Use Scenario: Provides robust front-end protection for telematics control units subjected to repeated load dump events in long-haul trucking applications. IC Role / Device Role / Timing Role: Standalone transient suppressor on main battery input, preceding EMI filter and primary DC-DC stage. Use Value: 6600 W peak power rating eliminates need for external series impedance, simplifying layout and reducing BOM count.

Engine Control Unit (ECU) Power Input Protection

Body Control Module (BCM) Battery Interface

Use Scenario: Protects 24 V input rails of engine control units against alternator load dump transients during battery disconnection.

IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and DC-DC converter input.

Use Value: Limits transient voltage to ≤64.3 V, preventing damage to downstream PMICs and microcontrollers rated for 40 V absolute maximum.

Use Scenario: Shields BCM power inputs from load dump and jump-start surges in commercial vehicle body electronics.

IC Role / Device Role / Timing Role: Primary overvoltage protection on main 24 V supply rail upstream of fuse and LDO regulators.

Use Value: Withstands 700 A surge current (8.3 ms) and maintains <10 µA leakage at 36 V, enabling low-power sleep-mode operation.

ADAS Camera Power Supply Protection

Commercial Truck Telematics Unit

Use Scenario: Safeguards image sensor and ISP power domains in rear-view and surround-view cameras exposed to harsh underhood conditions.

IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector entry point on camera PCB.

Use Value: 175 °C junction rating and 0.90 °C/W R_θJC allow direct heatsink mounting, ensuring stable clamping performance at elevated ambient temperatures.

Use Scenario: Provides robust front-end protection for telematics control units subjected to repeated load dump events in long-haul trucking applications.

IC Role / Device Role / Timing Role: Standalone transient suppressor on main battery input, preceding EMI filter and primary DC-DC stage.

Use Value: 6600 W peak power rating eliminates need for external series impedance, simplifying layout and reducing BOM count.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS protection applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Littelfuse SMAJ36A	Lower P_PPM (400 W), DO-214AC package, 58.1 V clamping at 69.4 A	Rated for lower-energy transients; suitable for non-automotive 24 V industrial controls	Select when cost sensitivity outweighs automotive qualification and surge margin requirements.
ON Semiconductor SMA6J36A	Same DO-214AC package; 64.3 V clamping at 62.5 A, 3850 W P_PPM, AEC-Q101 qualified	Limited to 3850 W surge handling; requires parallel devices for full ISO7637-2 Pulse 5 compliance	Choose only if board space constraints prevent DO-218AB footprint and thermal design accommodates reduced power rating.

Compared with SMAJ36A and SMA6J36A, the SM8S36-2HE3/I delivers 72 % higher peak pulse power (6600 W vs. ≤3850 W), superior thermal performance (R_θJC = 0.90 °C/W vs. >3.0 °C/W), and guaranteed ISO7637-2 Pulse 5a/b compliance - making it the only single-device solution for demanding automotive load dump protection.

Availability

SM8S36-2HE3/I is available at Aetrix Electronics and suitable for automotive ECU power input protection, body control module battery interface hardening, and ADAS camera supply rail safeguarding requiring stable component supply across extended production lifecycles.

Supply support for SM8S36-2HE3/I 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 SM8Sxx family was engineered specifically for automotive load dump suppression, combining high-temperature operation (175 °C), AEC-Q101 qualification, and industry-leading 6600 W surge capability in the DO-218AB package.

FAQ

What is the clamping voltage of the SM8S36-2HE3/I at its rated peak pulse current?

The SM8S36-2HE3/I has a maximum clamping voltage (V_C) of 64.3 V at its specified peak pulse current (I_PPM) of 103 A under the 10/1000 µs waveform. This value is measured per the conditions defined in the Vishay datasheet (Document Number 88387, Rev. 31-Aug-16) and ensures downstream components see limited overvoltage stress during load dump events. The SM8S36-2HE3/I maintains this clamping performance across its full operating temperature range.

Is the SM8S36-2HE3/I qualified for automotive applications?

Yes, the SM8S36-2HE3/I is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 load dump requirements, operates reliably up to 175 °C junction temperature, and is rated for MSL Level 1 handling. Its DO-218AB package and HE3 suffix confirm RoHS compliance and JESD201 Class 2 whisker resistance - all verified per Vishay's qualification report referenced in datasheet 88387. The SM8S36-2HE3/I is intended for underhood and other high-reliability vehicle subsystems.

What is the polarity configuration of the SM8S36-2HE3/I?

The SM8S36-2HE3/I is a unidirectional TVS diode with anode-connected metal heatsink (Lead 2) and cathode at Lead 1. This configuration allows it to conduct only during positive transients on the cathode side relative to the anode/heatsink, making it suitable for protecting positive-rail systems like 24 V automotive battery feeds. The datasheet explicitly states "Available in uni-directional polarity only" and identifies the heatsink as the anode terminal.

How does the thermal performance of the SM8S36-2HE3/I compare to standard SMA packages?

The SM8S36-2HE3/I uses the DO-218AB package, which provides a typical junction-to-case thermal resistance (R_θJC) of 0.90 °C/W - significantly lower than standard SMA (DO-214AC) packages (~3.5–4.5 °C/W). This enables more efficient heat transfer to the PCB copper pour or chassis, supporting sustained high-power transient absorption without thermal runaway. The SM8S36-2HE3/I's thermal advantage is critical for maintaining clamping voltage stability during repetitive load dump events in automotive applications.

What is the maximum reverse leakage current of the SM8S36-2HE3/I at operating temperature?

The SM8S36-2HE3/I exhibits a maximum reverse leakage current (I_D) of 10 µA at V_WM = 36.0 V and T_A = 25 °C, and up to 150 µA at the same voltage but at T_J = 175 °C. These values are specified in the Electrical Characteristics table of Vishay datasheet 88387 and reflect the device's optimized junction passivation. Low leakage ensures minimal power loss in always-on vehicle modules, preserving battery life - a key requirement for the SM8S36-2HE3/I's target applications.

SM8S36-2HE3/I 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

SM8S36-2HE3/I FAQ

1.How can I place an order for SM8S36-2HE3/I through Aetrix?

Please submit a Request for Quotation (RFQ) for SM8S36-2HE3/I 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 SM8S36-2HE3/I reliable?

The price and inventory of SM8S36-2HE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36-2HE3/I is usually 5 days.

3.What payment methods are accepted for SM8S36-2HE3/I?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36-2HE3/I transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SM8S36-2HE3/I?

SM8S36-2HE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SM8S36-2HE3/I 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 SM8S36-2HE3/I?

For technical support, including SM8S36-2HE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36-2HE3/I requirements.

6.How does Aetrix verify that SM8S36-2HE3/I is sourced from the original manufacturer or authorized distributors?

All SM8S36-2HE3/I 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 SM8S36-2HE3/I meets industry standards.

7.What is the process for return or replacement of SM8S36-2HE3/I?

All SM8S36-2HE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36-2HE3/I, 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 SM8S36-2HE3/I part is unused and in its original packaging.

Return procedure for SM8S36-2HE3/I:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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