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Vishay General Semiconductor - Diodes Division SM8S36-7001HE4/2N
- Part No.:
- SM8S36-7001HE4/2N
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36-7001HE4/2N.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO218AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM8S36-7001HE4/2N from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 12 V and 24 V systems. It features a 36.0 V stand-off voltage (VWM), 40.0–48.9 V breakdown range (VBR), 64.3 V clamping voltage at 103 A (VC), 6600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM8S36-7001HE4/2N datasheet, SM8S36-7001HE4/2N pinout, SM8S36-7001HE4/2N application, or SM8S36-7001HE4/2N equivalent, key selection criteria include its DO-218AB package thermal performance (RθJC = 0.90 °C/W), 175 °C junction rating, uni-directional polarity with heatsink-as-anode configuration, and compliance with ISO7637-2 surge testing.
Technical Context
This TVS diode operates as a clamping device in series with the power rail, conducting only when reverse voltage exceeds VBR to limit transients to VC. Its passivated anisotropic rectifier structure enables low leakage (<10 μA at VWM) and low forward voltage drop (<1.8 V at 100 A), critical for minimizing standby loss in always-on automotive modules.
The DO-218AB package integrates a metal heatsink directly into the cathode-side lead frame, enabling high thermal conductivity and supporting 700 A non-repetitive surge current (IFSM). Its MSL Level 1 rating and JESD201 Class 2 whisker resistance confirm suitability for reflow-soldered automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system overvoltage trip threshold. |
| VBR min/max | 40.0 V / 48.9 V - Breakdown occurs within this range at 5 mA test current; defines turn-on consistency across production lots. |
| VC @ IPPM | 64.3 V - Clamped voltage at 103 A peak pulse (10/1000 μs); determines maximum stress on downstream ICs during load dump. |
| PPPM (10/1000 μs) | 6600 W - Peak transient energy handling capacity; supports ISO7637-2 Pulse 5a (load dump) up to 120 V, 400 ms. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot engine control units without derating. |
| RθJC | 0.90 °C/W - Thermal resistance from junction to case; allows direct heatsink mounting for sustained 8 W power dissipation. |
| Polarity | Uni-directional - Anode connected to heatsink; requires correct orientation in series with positive supply rail. |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended, metal heatsink-integrated package with matte tin-plated leads. Heatsink forms the anode terminal and provides primary thermal path; cathode is the molded lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Heatsink (Anode) | Anode connection | Must be electrically connected to system ground or low-impedance return path; serves as primary thermal interface. |
| Lead 1 (Cathode) | Cathode connection | Connected to protected line (e.g., battery feed); clamps transients to VWM + VC when triggered. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier technology ensures stable VBR and <10 μA leakage at 175 °C - critical for long-term reliability in engine compartments. |
| AEC-Q101 qualification | Validated for automotive-grade stress tests including HTGB, HTRB, and temperature cycling - required for ECU, BCM, and ADAS module designs. |
| ISO7637-2 compliance | Meets Pulse 5a (load dump) requirements up to 120 V, 400 ms with appropriate layout - eliminates need for external snubbers in 24 V commercial vehicle systems. |
| MSL Level 1 | Rated for peak reflow temperatures up to 245 °C - supports standard lead-free assembly without moisture sensitivity concerns. |
| Low VF at high IF | ≤1.8 V forward voltage at 100 A (8.3 ms half-sine) - minimizes conduction loss during reverse-polarity fault events. |
Applications
| Engine Control Unit (ECU) Power Protection | Body Control Module (BCM) Input Protection |
|---|---|
Use Scenario: Protects 5 V/3.3 V regulator inputs from 12 V battery line transients during cold-cranking and alternator load dump. IC Role / Device Role / Timing Role: Uni-directional clamping TVS placed upstream of LDOs and microcontrollers to limit input voltage to safe levels. Use Value: Withstands 6600 W surges and clamps to 64.3 V, preventing damage to downstream regulators rated for ≤65 V absolute maximum input. | Use Scenario: Shields LIN bus transceivers and door lock drivers from battery line spikes in vehicle body electronics. IC Role / Device Role / Timing Role: Fast-response transient suppressor on 12 V supply rail feeding multiple low-power ICs and solenoid drivers. Use Value: 10 μA leakage at 36 V VWM avoids loading always-on circuits; 175 °C rating supports placement near fuse boxes. |
| Commercial Vehicle 24 V System Protection | Start-Stop System Battery Interface |
Use Scenario: Safeguards DC-DC converters and CAN controllers in trucks and buses exposed to harsher load dump profiles (up to 120 V). IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24 V distribution rail, coordinated with secondary TVS or varistors. Use Value: 64.3 V clamping voltage ensures margin below 75 V-rated input stages; DO-218AB heatsink enables >5 W continuous dissipation. | Use Scenario: Protects bidirectional battery monitoring ICs and charge controllers during repeated engine restarts with high dV/dt transients. IC Role / Device Role / Timing Role: Transient suppressor on battery sense line and main power path to prevent latch-up in precision analog front-ends. Use Value: Low 0.90 °C/W RθJC allows direct thermal coupling to chassis ground, maintaining <125 °C junction temp during 10 Hz restart cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Lower PPPM (400 W vs. 6600 W); SMA package; bidirectional option available | Not suitable for ISO7637-2 load dump; limited to ESD and low-energy transients | Select only for cost-sensitive consumer applications where peak surge energy <500 W. |
| SM8S36AHE3/2N | Narrower VBR range (40.0–44.2 V vs. 40.0–48.9 V); same DO-218AB package and ratings | Offers tighter VBR tolerance for systems requiring precise clamping onset; identical thermal and surge capability | Prefer for new designs needing improved VBR consistency; backward-compatible in layout and thermal design. |
Compared with SMAJ36A-E3/57T, SM8S36-7001HE4/2N delivers 16.5× higher surge power and automotive-grade thermal robustness; versus SM8S36AHE3/2N, it trades VBR tightness for broader manufacturing yield while retaining full load dump capability and pinout compatibility.
Availability
SM8S36-7001HE4/2N is available at Aetrix Electronics and suitable for automotive electronic control units, body control modules, and commercial vehicle power systems requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for SM8S36-7001HE4/2N 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 automotive, industrial, and computing applications.
The SM8Sxx family was engineered specifically for high-energy automotive load dump protection, combining DO-218AB thermal efficiency with AEC-Q101 reliability to replace older axial-leaded TVS solutions in space-constrained ECUs.
FAQ
What is the clamping voltage of the SM8S36-7001HE4/2N at its rated peak pulse current?
The SM8S36-7001HE4/2N has a maximum clamping voltage (VC) of 64.3 V at its peak pulse current (IPPM) of 103 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 64.3 V during worst-case load dump events, provided the device is mounted with adequate thermal mass. The SM8S36-7001HE4/2N achieves this while maintaining low leakage and high surge capability.
Is the SM8S36-7001HE4/2N suitable for 24 V commercial vehicle systems?
Yes, the SM8S36-7001HE4/2N is explicitly rated for ISO7637-2 Pulse 5a load dump protection in both 12 V and 24 V automotive systems. Its 64.3 V clamping voltage and 6600 W peak pulse power ensure compatibility with the higher energy transients typical in heavy-duty vehicles. The SM8S36-7001HE4/2N's 175 °C junction rating and DO-218AB package further support under-hood deployment in commercial vehicle ECUs.
How does the DO-218AB package of the SM8S36-7001HE4/2N improve thermal performance compared to SMA or SMC packages?
The DO-218AB package of the SM8S36-7001HE4/2N integrates a large metal heatsink directly into the anode terminal, achieving a junction-to-case thermal resistance (RθJC) of just 0.90 °C/W - significantly lower than SMA (≈35 °C/W) or SMC (≈12 °C/W) packages. This enables the SM8S36-7001HE4/2N to dissipate 8 W continuously on an infinite heatsink and sustain high-energy surges without thermal runaway. The heatsink must be soldered to a copper pour for optimal performance.
Does the SM8S36-7001HE4/2N meet AEC-Q101 requirements for automotive use?
Yes, the SM8S36-7001HE4/2N is fully AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. This qualification is documented in Vishay's official certification records and applies specifically to the SM8S36-7001HE4/2N variant with HE4/2N packaging. The SM8S36-7001HE4/2N is approved for use in safety-critical automotive subsystems such as engine management and braking control.
What is the polarity configuration and recommended PCB layout for the SM8S36-7001HE4/2N?
The SM8S36-7001HE4/2N is unidirectional with the metal heatsink serving as the anode terminal and Lead 1 as the cathode. For proper operation, the anode must connect to system ground or low-impedance return, while the cathode connects to the protected line. The PCB layout must provide ≥200 mm² of 2 oz copper connected to the heatsink pad to achieve rated thermal performance. The SM8S36-7001HE4/2N cannot be used in bidirectional configurations without external circuitry.
SM8S36-7001HE4/2N 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
SM8S36-7001HE4/2N FAQ
1.How can I place an order for SM8S36-7001HE4/2N through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36-7001HE4/2N 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 SM8S36-7001HE4/2N reliable?
The price and inventory of SM8S36-7001HE4/2N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36-7001HE4/2N is usually 5 days.
3.What payment methods are accepted for SM8S36-7001HE4/2N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36-7001HE4/2N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36-7001HE4/2N?
SM8S36-7001HE4/2N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36-7001HE4/2N 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 SM8S36-7001HE4/2N?
For technical support, including SM8S36-7001HE4/2N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36-7001HE4/2N requirements.
6.How does Aetrix verify that SM8S36-7001HE4/2N is sourced from the original manufacturer or authorized distributors?
All SM8S36-7001HE4/2N 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 SM8S36-7001HE4/2N meets industry standards.
7.What is the process for return or replacement of SM8S36-7001HE4/2N?
All SM8S36-7001HE4/2N units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36-7001HE4/2N, 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 SM8S36-7001HE4/2N part is unused and in its original packaging.
Return procedure for SM8S36-7001HE4/2N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36-7001HE4/2N Tags
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