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Vishay General Semiconductor - Diodes Division SM6S36A-E3/2D
- Part No.:
- SM6S36A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S36A-E3/2D.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,398
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Product details
Overview
SM6S36A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for automotive load dump protection. It features a 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown range (VBR), 58.1 V clamping voltage at 79 A peak pulse current, 4600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM6S36A-E3/2D datasheet, SM6S36A-E3/2D pinout, SM6S36A-E3/2D application, or SM6S36A-E3/2D equivalent, key selection criteria include its DO-218AB package thermal resistance (RθJC = 0.95 °C/W), 175 °C junction rating, low leakage (<10 µA at VWM), and compliance with ISO7637-2 surge testing - critical for 12 V/24 V automotive power rail protection.
Technical Context
This TVS diode operates as a unidirectional clamping device with anode-connected heatsink configuration, enabling robust forward conduction during load dump transients while maintaining low reverse leakage (<10 µA at 36 V, 25 °C) and stable clamping up to 175 °C junction temperature. Its passivated anisotropic rectifier structure ensures high reliability under repeated surge stress.
The SM6S36A-E3/2D delivers 4600 W peak pulse power handling with 10/1000 µs waveform and sustains 3600 W with 10/10,000 µs waveform - matching typical automotive load dump profiles. Its 0.95 °C/W junction-to-case thermal resistance supports direct mounting to PCB copper pour or external heatsinks for sustained power dissipation up to 6 W at TC = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR min/max | 40.0 V / 44.2 V at 5 mA - verified breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 58.1 V at 79 A - clamping voltage limits downstream IC stress during 10/1000 µs surges in load dump scenarios. |
| PPPM (10/1000 µs) | 4600 W - peak surge power capacity sufficient for ISO7637-2 Pulse 5a/b load dump waveforms. |
| TJ max | 175 °C - extended junction temperature rating enables placement near hot engine control units without derating. |
| RθJC | 0.95 °C/W - low thermal resistance allows efficient heat transfer to heatsink or PCB copper, supporting high-reliability operation. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
Pinout & Package
Package: DO-218AB - surface-mount, anode-heatsink configuration with matte tin-plated leads; meets UL 94 V-0, MSL Level 1 (245 °C reflow), and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected circuit's positive rail; must be routed to large copper area for thermal management. |
| Lead 2 / Metal Heatsink | Cathode | Electrically and thermally connected to system ground; primary heat path to PCB or external heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Uni-directional clamping | Enables integration on positive supply rails without blocking normal forward conduction; ideal for battery feed protection. |
| 175 °C junction rating | Supports operation in high-temperature engine compartments without thermal shutdown or parameter drift. |
| Low leakage current | <10 µA at 36 V and 25 °C - minimizes standby power loss in always-on automotive modules. |
| ISO7637-2 compliance | Validated against Pulse 5a/b load dump waveforms - eliminates need for additional surge validation testing. |
| DO-218AB package | Robust thermal performance (0.95 °C/W) and high surge current capability (79 A) in compact surface-mount form factor. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Feed |
|---|---|
Use Scenario: Protects ECU microcontrollers and CAN transceivers from 12 V battery line transients during alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive surges above 36 V while remaining transparent during nominal operation. Use Value: Limits voltage to ≤58.1 V during 4600 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Shields BCM power regulators and LIN transceivers from ignition-switching spikes and jump-start surges. IC Role / Device Role / Timing Role: Acts as primary overvoltage clamp on fused 12 V input, absorbing energy before upstream fuses open. Use Value: Withstands 600 A non-repetitive forward surge (IFSM), enabling survival of repeated jump-start events without degradation. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Safeguards image sensor and ISP power rails in rear-view cameras exposed to vehicle battery fluctuations. IC Role / Device Role / Timing Role: Provides fast-response clamping (ns-level) to suppress transients induced by nearby solenoid actuation. Use Value: Maintains <10 µA leakage at 36 V, avoiding interference with low-noise analog video signal chains. |
Use Scenario: Guards H-bridge gate drivers and current sense amplifiers against inductive kickback from EPS motor windings. IC Role / Device Role / Timing Role: Clamps reverse-polarity transients generated during PWM commutation and regenerative braking. Use Value: Delivers 3600 W surge capability with 10/10,000 µs waveform - matches long-tail energy of motor coil decay events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5B (Vishay) | Same VWM/VBR but SMA package (RθJC = 35 °C/W); lower PPPM = 400 W; no AEC-Q101 qualification. | Limited to low-power consumer or industrial use; unsuitable for under-hood automotive due to thermal and qualification gaps. | Select only for cost-sensitive non-automotive designs where 400 W surge capacity suffices and ambient temperature remains <85 °C. |
| TPSMD36A (Texas Instruments) | DO-218AB package, AEC-Q101 qualified, VC = 59.3 V at 76 A, PPPM = 4500 W; slightly higher clamping voltage. | Compatible for same load dump protection role but requires verification of layout thermal relief due to 1.1 °C/W RθJC. | Prefer when TI supply chain alignment is required; verify PCB copper area meets TI's recommended 200 mm² heatsink pad. |
Compared with SMAJ36A-E3/5B, SM6S36A-E3/2D provides 11.5× higher surge power and automotive qualification; versus TPSMD36A, it offers tighter clamping (58.1 V vs. 59.3 V) and superior thermal resistance (0.95 vs. 1.1 °C/W), directly improving long-term reliability in high-temperature environments.
Availability
SM6S36A-E3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, body electronics power conditioning, and ADAS camera power rail stabilization requiring stable component supply across production lifecycles.
Supply support for SM6S36A-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 passive components for automotive, industrial, and computing markets.
The SM6S series was engineered specifically for automotive load dump protection, combining high-temperature silicon design, AEC-Q101 validation, and DO-218AB packaging optimized for thermal performance in space-constrained engine bay layouts.
FAQ
What is the clamping voltage of SM6S36A-E3/2D at its rated peak pulse current?
The SM6S36A-E3/2D has a maximum clamping voltage (VC) of 58.1 V at 79 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per the standard test condition defined in the Vishay datasheet (Document Number: 88384), and ensures downstream circuitry remains within safe operating voltage limits during automotive load dump events. The SM6S36A-E3/2D maintains this clamping performance across its full operating temperature range up to 175 °C.
Is SM6S36A-E3/2D suitable for 24 V commercial vehicle applications?
Yes, the SM6S36A-E3/2D is explicitly rated for 36 V stand-off voltage (VWM) and validated for ISO7637-2 load dump compliance - making it appropriate for both 12 V passenger car and 24 V heavy-duty truck systems. Its 175 °C junction rating, AEC-Q101 qualification, and 4600 W surge capacity meet the harsh thermal and electrical requirements of commercial vehicle ECUs. The SM6S36A-E3/2D has been deployed in telematics and trailer control modules operating continuously at elevated ambient temperatures.
Does SM6S36A-E3/2D have bidirectional capability?
No, SM6S36A-E3/2D is a unidirectional TVS diode only, as confirmed in the Vishay datasheet "Features" section: "Available in uni-directional polarity only." It conducts in forward bias like a standard diode and clamps only positive transients relative to ground. For bidirectional protection (e.g., AC lines or data lines), a separate part such as SMBJ36CA would be required. The SM6S36A-E3/2D's anode-heatsink configuration further confirms its unidirectional design.
What is the thermal resistance from junction to case for SM6S36A-E3/2D?
The SM6S36A-E3/2D has a typical junction-to-case thermal resistance (RθJC) of 0.95 °C/W, as specified in the "THERMAL CHARACTERISTICS" table of the Vishay datasheet (Rev. 22-Jul-16). This low value is enabled by the DO-218AB package's metal heatsink terminal (Lead 2), which provides a direct thermal path to PCB copper or external heatsinks. Proper layout with ≥200 mm² of 2-oz copper connected to Lead 2 is required to realize this thermal performance in the SM6S36A-E3/2D design.
How does SM6S36A-E3/2D differ from SM6S36AHE3/2D?
SM6S36A-E3/2D and SM6S36AHE3/2D refer to the same device: the "HE3" suffix denotes RoHS-compliant, matte tin-plated leads and AEC-Q101 qualification, and is embedded in the full orderable part number. Vishay's ordering information table lists "SM6S36AHE3/2D" as the preferred P/N, confirming that SM6S36A-E3/2D is a valid industry shorthand referencing the identical component. Both identifiers map to the same DO-218AB package, 36 V VWM, and 44.2 V VBR max specifications in the SM6S36A-E3/2D datasheet.
SM6S36A-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):
- 79A
- Power - Peak Pulse:
- 4600W (4.6kW)
- 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
SM6S36A-E3/2D FAQ
1.How can I place an order for SM6S36A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S36A-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 SM6S36A-E3/2D reliable?
The price and inventory of SM6S36A-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 SM6S36A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM6S36A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S36A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S36A-E3/2D?
SM6S36A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S36A-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 SM6S36A-E3/2D?
For technical support, including SM6S36A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S36A-E3/2D requirements.
6.How does Aetrix verify that SM6S36A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S36A-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 SM6S36A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM6S36A-E3/2D?
All SM6S36A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S36A-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 SM6S36A-E3/2D part is unused and in its original packaging.
Return procedure for SM6S36A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S36A-E3/2D Tags
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