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Vishay General Semiconductor - Diodes Division SM5S36AHE3_A/I
- Part No.:
- SM5S36AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S36AHE3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,006
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Product details
Overview
SM5S36AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), 3600 W peak pulse power (10/1000 μs), 62 V clamping voltage at 150 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the SM5S36AHE3_A/I datasheet, SM5S36AHE3_A/I pinout, SM5S36AHE3_A/I application, or SM5S36AHE3_A/I equivalent, key selection criteria include its DO-218AB package thermal performance (RθJM = 0.45 °C/W), 175 °C junction rating, unidirectional polarity with heatsink-as-anode configuration, and compliance with ISO7637-2 load dump waveforms.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature transients. Its junction passivation enables reliable operation up to TJ = 175 °C and low leakage (<10 μA at VWM, <15 μA at TJ = 175 °C), critical for automotive ECU and body control module protection.
The device is optimized for 10/1000 μs surge waveforms with 150 A peak pulse current and 58.1 V maximum clamping voltage. Its DO-218AB case provides low thermal resistance to heatsink (RθJM = 0.45 °C/W), enabling effective power dissipation during repetitive load dump events without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; defines system bus voltage compatibility. |
| VBR (min/typ/max) | 40.0 / 42.1 / 44.2 V - Breakdown threshold range at 5 mA test current; ensures predictable turn-on during overvoltage. |
| VC @ IPPM | 58.1 V - Clamping voltage at 150 A peak pulse; limits downstream IC stress during ISO7637-2 load dump. |
| PPPM (10/1000 μs) | 3600 W - Peak surge power handling; supports high-energy automotive transients without failure. |
| TJ max. | 175 °C - Maximum junction temperature; enables placement near hot engine compartments with full reliability margin. |
| RθJM | 0.45 °C/W - Junction-to-mount thermal resistance; allows direct heatsink mounting for sustained power dissipation. |
| Polarity | Unidirectional - Anode connected to heatsink; simplifies PCB layout for ground-referenced protection schemes. |
Pinout & Package
Package: DO-218AB - Surface-mount molded case with matte tin-plated leads, UL 94 V-0 rated compound, MSL Level 1, and JESD201 Class 2 whisker resistance. Heatsink tab serves as anode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink Tab) | High-current return path and thermal interface | Must be soldered to large copper area or external heatsink; electrically connects to system ground or battery negative in unidirectional configurations. |
| Cathode (Lead 1) | Transient voltage sensing and clamping node | Connected to protected line (e.g., 12 V rail); conducts surge current to anode when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per stress test plan. |
| Junction passivation | Reduces surface leakage and improves long-term stability under humidity and bias stress at 175 °C. |
| ISO7637-2 compliance | Withstands defined load dump pulses (e.g., Pulse 5a) without parametric shift or catastrophic failure. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, protecting sensitive CAN/LIN transceivers and microcontrollers. |
| MSL Level 1 | Zero floor life limitation; can be stored indefinitely and mounted using standard reflow profiles up to 245 °C peak. |
Applications
| Automotive Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Protection of 12 V power input against alternator load dump surges during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC/DC converter input. Use Value: Limits transient voltage to ≤58.1 V at 150 A, preventing damage to 40 V-rated input MOSFETs and LDO regulators. |
Use Scenario: Safeguarding LIN bus power supply lines from coupled transients generated by window motor switching. IC Role / Device Role / Timing Role: Primary overvoltage suppression on 12 V auxiliary rail feeding LIN transceivers and sensors. Use Value: Maintains <10 μA leakage at 36 V, avoiding false wake-up or quiescent current violations in sleep-mode BCM designs. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Control Unit |
Use Scenario: Input rail protection for image sensor and ISP power supplies exposed to vehicle-level EMI and load switching noise. IC Role / Device Role / Timing Role: Fast-response TVS on 5 V or 3.3 V post-regulation rails downstream of buck converters. Use Value: 0.45 °C/W RθJM enables direct thermal coupling to metal shield, sustaining repeated 10/1000 μs surges without thermal runaway. |
Use Scenario: Protection of high-current motor driver power stages from inductive kickback during PWM commutation. IC Role / Device Role / Timing Role: High-power TVS across H-bridge supply rail, referenced to chassis ground via heatsink tab. Use Value: 3600 W peak pulse rating absorbs energy from 500 A IFSM-rated MOSFET switching events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S36AHM3_A/I | Same electrical specs and DO-218AB package; HM3 suffix indicates enhanced material set with improved high-temp lifetime and lower leakage drift. | Preferred for new designs targeting extended service life (>15 years) in under-hood environments above 125 °C ambient. | Select SM5S36AHM3_A/I when designing for long-lifecycle automotive programs where field reliability beyond 10 years is mandated. |
| SMAJ36A | Lower PPPM (400 W), SMA package (RθJA = 110 °C/W), no AEC-Q101 qualification, higher VC (60.0 V). | Limited to non-safety-critical consumer or industrial applications with lower surge severity and ambient temperature <105 °C. | Use SMAJ36A only for cost-sensitive, non-automotive applications where ISO7637-2 compliance and 175 °C operation are not required. |
Compared with SM5S36AHE3_A/I, SM5S36AHM3_A/I offers superior long-term stability and is recommended for new designs, while SMAJ36A lacks automotive qualification and thermal robustness-making it unsuitable for load dump protection in modern vehicles.
Availability
SM5S36AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU protection, body control modules, ADAS camera power rails, and electric power steering systems requiring stable component supply across extended production lifecycles.
Supply support for SM5S36AHE3_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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM5SxxA family is engineered specifically for automotive load dump and inductive switching transient suppression, emphasizing AEC-Q101 qualification, 175 °C operation, and DO-218AB thermal performance.
FAQ
What is the clamping voltage of the SM5S36AHE3_A/I at its rated peak pulse current?
The SM5S36AHE3_A/I has a maximum clamping voltage (VC) of 58.1 V at 150 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and ensures downstream components see limited overvoltage during ISO7637-2 Pulse 5a load dump events. The SM5S36AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the SM5S36AHE3_A/I suitable for new automotive designs?
No-the SM5S36AHE3_A/I is marked "Not For New Designs" in Vishay's official documentation, with SM5S36AHM3_A/I designated as the recommended alternative. The SM5S36AHE3_A/I remains available for legacy program support and existing production, but new designs should use the HM3 variant for enhanced long-term reliability and updated material qualifications.
How is polarity configured on the SM5S36AHE3_A/I, and what is the role of the heatsink tab?
The SM5S36AHE3_A/I is unidirectional, with the metal heatsink tab serving as the anode terminal and Lead 1 as the cathode. This configuration requires the heatsink tab to be connected to the system reference (typically chassis or battery negative), while the cathode connects to the line being protected. The SM5S36AHE3_A/I's polarity is fixed and cannot be reversed without functional failure.
Does the SM5S36AHE3_A/I meet ISO7637-2 requirements for automotive load dump protection?
Yes-the SM5S36AHE3_A/I is explicitly rated to meet ISO7637-2 surge specifications under defined test conditions, including Pulse 5a (load dump). Its 3600 W peak pulse power rating, 58.1 V clamping voltage, and 175 °C junction capability enable compliance when properly mounted to a thermally adequate heatsink. The SM5S36AHE3_A/I datasheet confirms validation per this standard.
What is the thermal resistance from junction to mount (RθJM) for the SM5S36AHE3_A/I, and why does it matter?
The SM5S36AHE3_A/I has a typical RθJM of 0.45 °C/W, measured per JEDEC 51-14 using the Transient Dual Interface Method. This low value reflects highly efficient heat transfer from the silicon die to the external heatsink through the metal tab. It matters because it directly determines how much surge energy the SM5S36AHE3_A/I can absorb repeatedly without exceeding 175 °C junction temperature-critical for automotive under-hood reliability.
SM5S36AHE3_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):
- 62A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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
SM5S36AHE3_A/I FAQ
1.How can I place an order for SM5S36AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S36AHE3_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 SM5S36AHE3_A/I reliable?
The price and inventory of SM5S36AHE3_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 SM5S36AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM5S36AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S36AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S36AHE3_A/I?
SM5S36AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S36AHE3_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 SM5S36AHE3_A/I?
For technical support, including SM5S36AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S36AHE3_A/I requirements.
6.How does Aetrix verify that SM5S36AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM5S36AHE3_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 SM5S36AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM5S36AHE3_A/I?
All SM5S36AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S36AHE3_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 SM5S36AHE3_A/I part is unused and in its original packaging.
Return procedure for SM5S36AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S36AHE3_A/I Tags
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