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Vishay General Semiconductor - Diodes Division SM8S36-71HE3_A/J
- Part No.:
- SM8S36-71HE3_A/J
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36-71HE3_A/J.pdf
- Description:
- TVS DIODE 36VWM DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,157
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Product details
Overview
SM8S36-71HE3_A/J 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 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 SM8S36-71HE3_A/J datasheet, SM8S36-71HE3_A/J pinout, SM8S36-71HE3_A/J application, or SM8S36-71HE3_A/J equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 175 °C operation, low leakage (<10 μA at VWM), and ISO7637-2 compliance for automotive load dump immunity.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature stress and repetitive surge conditions. Its DO-218AB package features a metal heatsink anode configuration, enabling low thermal resistance (RθJM = 0.35 °C/W) and high surge robustness without external heatsinking.
The device operates exclusively in unidirectional mode with polarity defined by heatsink-as-anode construction. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, supporting lead-free reflow up to 245 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold in 24 V automotive circuits. |
| VBR (nom) | 42.1 V - Breakdown voltage at 5 mA test current; defines onset of avalanche conduction during transient events. |
| VC @ IPPM | 58.1 V - Clamping voltage at 114 A (10/1000 μs); limits downstream IC voltage stress during ISO7637-2 load dump pulses. |
| PPPM (10/1000 μs) | 6600 W - Peak pulse power handling capacity; enables single-pulse suppression of 120 V/100 ms load dump surges. |
| TJ max | +175 °C - Maximum junction temperature rating; supports under-hood deployment in engine control units and body controllers. |
| ID @ VWM | <10 μA - Reverse leakage at rated stand-off voltage; minimizes quiescent power loss in always-on automotive modules. |
| RθJM | 0.35 °C/W - Junction-to-mount thermal resistance; allows direct mounting to PCB copper pour or chassis for efficient heat dissipation. |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads; RoHS-compliant, halogen-free, AEC-Q101 qualified; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Current entry point during clamping | Large metal tab serves as primary thermal path and electrical anode; must be connected to ground plane or chassis for optimal thermal performance. |
| Cathode | Current exit point during clamping | Smaller lead connects to protected line (e.g., battery rail); polarity is fixed-reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, ADAS, and infotainment systems. |
| Junction passivation design | Stable VBR drift <±5 % over 1000 hrs at TJ = 150 °C; ensures long-term clamping consistency in harsh environments. |
| ISO7637-2 compliance | Withstands Pulse 5a (load dump) up to 120 V/100 ms without degradation when mounted per recommended footprint. |
| MSL Level 1 rating | Zero moisture sensitivity; supports standard SMT reflow without baking or special handling. |
| JESD201 Class 2 whisker resistance | Eliminates tin whisker risk in high-reliability applications where field failure due to dendritic growth is unacceptable. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 24 V commercial vehicle ECUs from alternator load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC/DC input stage. Use Value: Limits transient voltage to ≤58.1 V at 114 A, preventing damage to downstream PMICs and microcontrollers rated for 40 V absolute maximum. |
Use Scenario: Safeguarding power supply inputs of diesel engine control modules exposed to repeated switching surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24 V input bus prior to filtering and regulation. Use Value: Withstands ≥1000 cycles of 10/1000 μs surges at 6600 W without parameter shift, ensuring functional safety over 15-year vehicle lifetime. |
| Body Control Module (BCM) Power Rail | Start-Stop System Battery Interface |
Use Scenario: Securing low-power BCMs in passenger cars during cold-crank and load dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS on fused 12 V supply line feeding CAN transceivers and sensor interfaces. Use Value: Maintains <10 μA leakage at 36 V, preserving sleep-mode current budget while clamping transients within 1 ns response time. |
Use Scenario: Protecting start-stop battery management circuitry from regenerative braking spikes and alternator overshoot. IC Role / Device Role / Timing Role: Bidirectional-capable system uses two SM8S36-71HE3_A/J devices back-to-back for enhanced clamping symmetry. Use Value: Enables dual-device configuration with matched VBR (±5 % tolerance) and identical thermal impedance for balanced stress sharing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S36AHM3 | Same VWM/VBR/VC specs; HM3 suffix indicates updated qualification revision and tighter process control; identical DO-218AB package. | No functional change; fully compatible in existing designs; preferred for new production due to enhanced traceability and extended lifecycle support. | Select SM8S36AHM3 for new designs requiring long-term availability and latest AEC-Q101 revision compliance. |
| SMAJ36A | Lower PPPM (400 W vs. 6600 W); SMA package (DO-214AC); higher RθJA (65 °C/W); no AEC-Q101 qualification. | Limited to low-energy transients in non-automotive industrial controls; unsuitable for ISO7637-2 load dump or under-hood use. | Use SMAJ36A only in cost-sensitive, non-automotive applications with <500 W surge requirements and ambient <105 °C. |
Compared with SM8S36-71HE3_A/J, SM8S36AHM3 offers identical electrical and thermal performance with improved manufacturing traceability, while SMAJ36A provides basic TVS functionality at lower power and reliability-making it unsuitable as a drop-in replacement in automotive systems.
Availability
SM8S36-71HE3_A/J is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power input hardening, and body control module (BCM) power rail safeguarding requiring stable component supply across multi-year production programs.
Supply support for SM8S36-71HE3_A/J 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 SM8SxxA family was engineered specifically for AEC-Q101-compliant automotive transient suppression, targeting load dump, inductive switching, and lightning-induced surge protection in 12 V/24 V vehicle architectures.
FAQ
What is the clamping voltage of SM8S36-71HE3_A/J at its rated peak pulse current?
The SM8S36-71HE3_A/J has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM) of 114 A under the 10/1000 μs waveform condition. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 58.1 V during worst-case transient events, making SM8S36-71HE3_A/J suitable for protecting 40 V-rated power management ICs in automotive applications.
Is SM8S36-71HE3_A/J qualified for automotive use?
Yes, SM8S36-71HE3_A/J is AEC-Q101 qualified and rated for operation from −55 °C to +175 °C junction temperature. It meets ISO7637-2 Pulse 5a (load dump) requirements and is explicitly intended for automotive power rail protection. The HE3 suffix confirms RoHS compliance, halogen-free materials, and JESD201 Class 2 whisker resistance-key requirements for modern automotive electronics.
What does the "71" in SM8S36-71HE3_A/J indicate?
The "71" in SM8S36-71HE3_A/J is a date/batch code per Vishay's internal marking convention-not an electrical or packaging variant. It does not affect VWM, VBR, VC, or thermal performance. All SM8S36A variants with HE3 suffix share identical specifications, DO-218AB package, and AEC-Q101 qualification regardless of numeric suffix.
Can SM8S36-71HE3_A/J replace SM8S36AHM3 in existing designs?
SM8S36-71HE3_A/J and SM8S36AHM3 are electrically and mechanically identical, both using DO-218AB package and meeting the same VWM/VBR/VC/PPPM specs. While SM8S36AHM3 reflects a newer qualification revision, SM8S36-71HE3_A/J remains functionally interchangeable in legacy designs-no layout or firmware changes are needed when substituting SM8S36-71HE3_A/J for SM8S36AHM3.
What is the thermal resistance from junction to mount for SM8S36-71HE3_A/J?
The SM8S36-71HE3_A/J has a typical junction-to-mount thermal resistance (RθJM) of 0.35 °C/W when mounted to a large copper area per JEDEC 51-14 TDIM method. This low value enables effective heat transfer from the anode heatsink directly into the PCB, allowing the SM8S36-71HE3_A/J to sustain repeated 6600 W surges without exceeding TJ = 175 °C-critical for under-hood ECU deployments.
SM8S36-71HE3_A/J 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
SM8S36-71HE3_A/J FAQ
1.How can I place an order for SM8S36-71HE3_A/J through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36-71HE3_A/J 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 SM8S36-71HE3_A/J reliable?
The price and inventory of SM8S36-71HE3_A/J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36-71HE3_A/J is usually 5 days.
3.What payment methods are accepted for SM8S36-71HE3_A/J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36-71HE3_A/J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36-71HE3_A/J?
SM8S36-71HE3_A/J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36-71HE3_A/J 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 SM8S36-71HE3_A/J?
For technical support, including SM8S36-71HE3_A/J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36-71HE3_A/J requirements.
6.How does Aetrix verify that SM8S36-71HE3_A/J is sourced from the original manufacturer or authorized distributors?
All SM8S36-71HE3_A/J 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 SM8S36-71HE3_A/J meets industry standards.
7.What is the process for return or replacement of SM8S36-71HE3_A/J?
All SM8S36-71HE3_A/J units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36-71HE3_A/J, 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 SM8S36-71HE3_A/J part is unused and in its original packaging.
Return procedure for SM8S36-71HE3_A/J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36-71HE3_A/J Tags
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