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Vishay General Semiconductor - Diodes Division SM8S36AHE3_A/I
- Part No.:
- SM8S36AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36AHE3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:12,908
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Product details
Overview
SM8S36AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) in DO-218AB package, rated for 36 V stand-off voltage (VWM), 42.1 V nominal breakdown (VBR), 58.1 V clamping voltage (VC) at 114 A peak pulse current, and 6600 W peak pulse power (10/1000 μs). It delivers automotive-grade protection against load dump transients in 12 V/24 V systems.
For engineers reviewing the SM8S36AHE3_A/I datasheet, SM8S36AHE3_A/I pinout, SM8S36AHE3_A/I application, or SM8S36AHE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 175 °C operation, ISO7637-2 compliance, low leakage (<10 μA at VWM), and DO-218AB thermal performance with RθJM = 0.35 °C/W.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-energy transients. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to metal chassis for enhanced thermal dissipation in automotive power distribution modules.
The device operates across -55 °C to +175 °C junction temperature range and meets MSL Level 1 per J-STD-020. Its 10/1000 μs waveform rating of 6600 W and 10/10,000 μs rating of 5200 W support robust load dump immunity per ISO7637-2 test pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/typ/max) | 40.0 / 42.1 / 44.2 V - Breakdown voltage range at 5 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 58.1 V at 114 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum overvoltage stress |
| PPPM (10/1000 μs) | 6600 W - Peak transient energy absorption capability; enables single-event load dump survival |
| TJ max | +175 °C - Enables under-hood deployment without derating in engine control units and body controllers |
| ID @ VWM | <10 μA - Low leakage preserves battery life in always-on automotive modules |
| RθJM | 0.35 °C/W - Junction-to-mount thermal resistance supports direct heatsink attachment for sustained power handling |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads; meets UL 94 V-0, JESD 201 Class 2 whisker resistance, and RoHS/AEC-Q101 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Electrically and thermally connected to metal base; must be soldered to copper pour or chassis for optimal thermal performance |
| Cathode | Current exit point during clamping | Standard cathode marking (band) on top surface; connects to protected line (e.g., battery rail) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Junction passivation optimized | Stable VBR drift <±5 % over lifetime under 175 °C bias; prevents premature failure in hot under-hood environments |
| ISO7637-2 compliant | Withstands Pulse 5a (load dump) up to 35 V/100 ms and Pulse 5b (clamped load dump) per specification |
| MSL Level 1 | Reflow-compatible up to 245 °C peak without moisture-induced damage; eliminates pre-bake requirement |
| Low forward voltage drop | VF ≤ 1.8 V at 100 A - Minimizes conduction loss during high-current surge events |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Rail Clamp |
|---|---|
Use Scenario: Protects microcontroller power rails from 12 V system load dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps battery rail to ≤58.1 V within nanoseconds, preventing overvoltage damage to downstream DC/DC converters and LDOs. Use Value: Eliminates need for external series resistors or active crowbar circuits due to 6600 W surge rating and 175 °C operation. | Use Scenario: Shields BCM logic supply from coupled transients induced by power window motor switching and HVAC blower activation. IC Role / Device Role / Timing Role: Fast-response clamping (tR < 1 ns) limits voltage overshoot on 12 V input to safe levels for PMIC and CAN transceivers. Use Value: Achieves <10 μA leakage at 36 V, preserving sleep-mode current budget in always-on vehicle networks. |
| ADAS Camera Power Supply Protection | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Safeguards image sensor and ISP power domains against ignition noise and alternator ripple in rear-view camera modules. IC Role / Device Role / Timing Role: DO-218AB package provides low-inductance path to chassis ground, reducing clamping overshoot during fast-rising transients. Use Value: RθJM = 0.35 °C/W enables direct mounting to aluminum housing, maintaining <125 °C junction temp during repeated surges. | Use Scenario: Absorbs inductive kickback from H-bridge MOSFET switching during EPS motor commutation and emergency stop events. IC Role / Device Role / Timing Role: Unidirectional configuration protects high-side driver supply while allowing normal forward conduction during PWM operation. Use Value: 700 A IFSM rating handles repetitive 8.3 ms half-sine surges without degradation, supporting ASIL-B functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S36AHM3_A/I | Same electrical specs and DO-218AB package; HM3 suffix indicates updated internal construction with improved surge lifetime | Identical use cases; preferred for new designs per Vishay's "Not For New Designs" notice for HE3 variants | Select SM8S36AHM3_A/I for production programs requiring long-term supply continuity and latest reliability enhancements |
| SMAJ36A | Lower PPPM (400 W vs. 6600 W); SMA package (RθJA ≈ 60 °C/W vs. DO-218AB's 0.35 °C/W RθJM) | Only suitable for low-energy ESD or low-duty-cycle transients-not load dump | Use SMAJ36A only in non-automotive, low-power applications where 6600 W surge capacity is unnecessary |
Compared with SM8S36AHE3_A/I, SM8S36AHM3_A/I offers identical clamping performance with enhanced long-term surge endurance, while SMAJ36A lacks the thermal and energy-handling capability required for automotive load dump protection-making it unsuitable as a functional replacement.
Availability
SM8S36AHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) design, and body control module (BCM) development requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SM8S36AHE3_A/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on automotive, industrial, and computing applications.
The SM8SxxA family was engineered specifically for high-energy automotive transient suppression, targeting ISO7637-2 Pulse 5 compliance and AEC-Q101 qualification in demanding under-hood environments.
FAQ
What is the clamping voltage of SM8S36AHE3_A/I at its rated peak pulse current?
The SM8S36AHE3_A/I has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated 114 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures protected downstream ICs remain below their absolute maximum voltage ratings during load dump events.
Is SM8S36AHE3_A/I qualified for automotive applications?
Yes, SM8S36AHE3_A/I is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 load dump requirements, operates from -55 °C to +175 °C, and is manufactured with process controls validated for automotive reliability standards including HTGB and TCT testing.
What does the "HE3" suffix mean in SM8S36AHE3_A/I?
The "HE3" suffix in SM8S36AHE3_A/I indicates RoHS-compliant, halogen-free construction with matte tin-plated leads, JESD 201 Class 2 whisker resistance, and AEC-Q101 qualification. The "A/I" denotes tape-and-reel packaging (750 pcs per reel) with anode orientation toward sprocket holes.
Can SM8S36AHE3_A/I replace SMAJ36A in a load dump protection circuit?
No, SM8S36AHE3_A/I cannot be directly replaced by SMAJ36A in load dump applications. SMAJ36A offers only 400 W peak pulse power versus 6600 W for SM8S36AHE3_A/I and lacks the thermal performance (RθJM = 0.35 °C/W) needed to survive automotive load dump transients without catastrophic failure.
What is the thermal resistance from junction to mount for SM8S36AHE3_A/I?
The SM8S36AHE3_A/I has a typical junction-to-mount thermal resistance (RθJM) of 0.35 °C/W, measured per JEDEC 51-14 using the Transient Dual Interface Method. This low value enables effective heat transfer to a metal chassis or PCB copper pour when the anode (heatsink) is properly soldered.
SM8S36AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM8S36AHE3_A/I FAQ
1.How can I place an order for SM8S36AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36AHE3_A/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 SM8S36AHE3_A/I reliable?
The price and inventory of SM8S36AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM8S36AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36AHE3_A/I?
SM8S36AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36AHE3_A/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 SM8S36AHE3_A/I?
For technical support, including SM8S36AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36AHE3_A/I requirements.
6.How does Aetrix verify that SM8S36AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM8S36AHE3_A/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 SM8S36AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM8S36AHE3_A/I?
All SM8S36AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36AHE3_A/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 SM8S36AHE3_A/I part is unused and in its original packaging.
Return procedure for SM8S36AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36AHE3_A/I Tags
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