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Vishay General Semiconductor - Diodes Division SM5S36ATHE3/I
- Part No.:
- SM5S36ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S36ATHE3/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:748
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Product details
Overview
SM5S36ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AC package, rated for 36 V stand-off voltage (VWM), 42.1 V nominal breakdown (VBR), 58.1 V clamping voltage at 150 A peak pulse current, and 3600 W peak pulse power (10/1000 μs). It operates up to 175 °C junction temperature and is AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM5S36ATHE3/I datasheet, SM5S36ATHE3/I pinout, SM5S36ATHE3/I application, or SM5S36ATHE3/I equivalent, this device is selected for high-reliability 12 V/24 V automotive power rail surge suppression where low leakage (<10 μA at VWM), low forward voltage drop (<2.0 V @ 100 A), and ISO7637-2 compliance are critical design requirements.
Technical Context
The SM5S36ATHE3/I employs passivated anisotropic rectifier technology with junction passivation optimized for stable clamping performance across -55 °C to +175 °C. Its thermal resistance (RθJC = 1.0 °C/W) enables effective heat transfer to the heatsink-anode structure, supporting sustained 5 W power dissipation on infinite heatsink at TC = 25 °C.
It delivers 150 A peak pulse current under 10/1000 μs waveform with 58.1 V clamping, and maintains <10 μA reverse leakage at 36 V stand-off and <250 μA at TJ = 175 °C. Polarity is fixed: metal heatsink serves as anode, lead 1 as cathode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (nom) | 42.1 V - breakdown voltage at 5 mA test current; defines onset of avalanche conduction |
| VC @ IPPM | 58.1 V - clamped voltage at 150 A peak pulse current; determines protected circuit stress level |
| PPPM (10/1000 μs) | 3600 W - peak surge power handling capability for standard lightning/surge waveforms |
| ID @ VWM | <10 μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +175 °C - enables operation in under-hood automotive environments without derating |
| RθJC | 1.0 °C/W - allows direct thermal coupling to PCB copper or external heatsink for reliable power cycling |
Pinout & Package
Package: DO-218AC - surface-mount, single-ended, heatsink-integrated case with matte tin-plated leads; anode connected to metal heatsink base, cathode to lead 1; meets UL 94 V-0 and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (cathode) | Transient current return path | Connected to protected circuit ground or low-side reference; carries full surge current during clamping |
| Metal heatsink (anode) | Main power rail connection | Serves as high-current anode terminal and primary thermal interface; must be soldered to large copper pour for RθJC optimization |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift ≤0.091 %/°C and long-term reliability under thermal cycling |
| TJ = 175 °C capability | Supports placement near high-power components in engine control units without thermal derating |
| Meets ISO7637-2 surge specification | Validated for load dump transients up to 35 V/100 ms and pulse 5a/b per automotive standard |
| AEC-Q101 qualified (HE3 suffix) | Qualified for automotive applications including ECU, body control modules, and ADAS power supplies |
| MSL Level 1, 245 °C reflow compatible | Allows single-pass lead-free reflow assembly without moisture sensitivity concerns |
Applications
| Automotive Load Dump Protection | 12 V Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting engine control unit (ECU) input rails during alternator load dump events (ISO7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient overvoltage to safe levels before it reaches downstream DC/DC converters and microcontrollers. Use Value: Limits peak rail voltage to ≤58.1 V during 3600 W surges, preventing latch-up or permanent damage to 40 V-rated power ICs. |
Use Scenario: Safeguarding infotainment head-unit power inputs against switching transients from solenoids and motors. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at board-level 12 V entry point, ahead of bulk capacitance and LDO regulators. Use Value: Sub-1 ns response time and 150 A surge capacity absorb repetitive inductive spikes without degradation over 100,000 cycles. |
| Industrial CAN Bus Power Line Protection | Commercial Vehicle Battery Monitoring Systems |
Use Scenario: Shielding CAN transceiver power pins in heavy-duty vehicle telematics modules exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC line feeding isolated CAN PHY, coordinated with secondary filtering. Use Value: Maintains <10 μA leakage at 36 V to avoid false wake-up in low-power sleep modes while surviving 2800 W (10/10,000 μs) surges. |
Use Scenario: Securing BMS front-end analog measurement circuits connected directly to 24 V truck battery terminals. IC Role / Device Role / Timing Role: High-energy TVS placed between battery feed and precision shunt regulator, acting as last-line defense. Use Value: 175 °C rating ensures stable clamping performance during extended high-temperature operation in cab-mounted BMS enclosures. |
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 | Same electrical specs but with enhanced MSL Level 1 robustness and improved high-temperature storage stability; HE3 suffix indicates AEC-Q101 qualification, HM3 indicates newer process revision. | Preferred for new designs targeting long-term automotive production; supports extended reflow profile tolerance and higher humidity resistance. | Select SM5S36AHM3 for new designs requiring full lifecycle support; SM5S36ATHE3/I remains valid for legacy builds with existing qualification. |
| SMAJ36A | Lower PPPM (400 W vs. 3600 W), smaller SMA package (RθJC ≈ 45 °C/W), no AEC-Q101 qualification, VBR min/max tighter (40.0–44.2 V same, but lower surge margin). | Suitable only for low-energy consumer-grade transients; cannot replace SM5S36ATHE3/I in load dump or ISO7637-2 applications. | Use SMAJ36A only in cost-sensitive non-automotive applications with <500 W surge exposure; not a functional substitute for SM5S36ATHE3/I. |
Compared with SM5S36AHM3, the SM5S36ATHE3/I offers identical clamping and thermal performance but lacks the latest process enhancements for extended MSL margin and shelf-life stability; versus SMAJ36A, it delivers 9× higher surge power handling and automotive-grade qualification-making it irreplaceable in under-hood load dump protection.
Availability
SM5S36ATHE3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial CAN bus systems, and commercial vehicle battery monitoring systems requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SM5S36ATHE3/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, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM5S series is part of Vishay's PAR® (Protected Avalanche Rectifier) platform, engineered specifically for high-energy automotive load dump and ISO7637-2 transient suppression with extended temperature and lifetime reliability.
FAQ
What is the clamping voltage of the SM5S36ATHE3/I at its rated peak pulse current?
The SM5S36ATHE3/I has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated 150 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on the protected circuit during surge events. The SM5S36ATHE3/I maintains this clamping performance across its full operating temperature range due to its low VBR temperature coefficient of 0.091 %/°C.
Is the SM5S36ATHE3/I suitable for new automotive designs?
No-the SM5S36ATHE3/I is marked "Not For New Designs" in Vishay's official documentation, with SM5S36AHM3 designated as the recommended alternative. While the SM5S36ATHE3/I remains fully qualified (AEC-Q101), supported, and electrically identical, new designs should use SM5S36AHM3 to ensure access to the latest process enhancements, extended MSL robustness, and full long-term lifecycle support. The SM5S36ATHE3/I is appropriate only for sustaining existing qualified designs.
How is polarity configured on the SM5S36ATHE3/I, and what does "heatsink is anode" mean?
The SM5S36ATHE3/I is unidirectional and polarized: the metal heatsink base is the anode, and lead 1 is the cathode. "Heatsink is anode" means the entire exposed metal case functions as the high-side terminal-requiring direct soldering to the positive power rail or a dedicated thermal pad tied to the supply voltage. This configuration enables efficient heat extraction while ensuring correct avalanche conduction direction during overvoltage events. Reversing polarity will prevent clamping and may cause catastrophic failure.
What is the maximum reverse leakage current of the SM5S36ATHE3/I at elevated temperature?
At junction temperature TJ = 175 °C, the SM5S36ATHE3/I exhibits a maximum reverse leakage current (ID) of 250 μA when biased at its 36 V stand-off voltage (VWM). This value is significantly higher than its room-temperature leakage (<10 μA), reflecting expected semiconductor behavior under thermal stress-but remains well within design margins for automotive power rail protection. The SM5S36ATHE3/I's low leakage at ambient ensures minimal standby power loss in always-on vehicle modules.
Does the SM5S36ATHE3/I meet ISO7637-2, and which test pulses does it cover?
Yes-the SM5S36ATHE3/I is specified to meet ISO7637-2 for automotive transient immunity, particularly Pulse 5a (load dump) and Pulse 5b (reversed battery with superimposed surge), as confirmed by Vishay's characterization data and application notes. Its 3600 W peak pulse power rating and 58.1 V clamping voltage enable compliance with the 35 V/100 ms load dump requirement when properly mounted with adequate thermal mass. The SM5S36ATHE3/I's DO-218AC package and 175 °C rating make it suitable for direct integration into ISO7637-2-compliant ECU power architectures.
SM5S36ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- 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):
- 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-218AC
SM5S36ATHE3/I FAQ
1.How can I place an order for SM5S36ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S36ATHE3/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 SM5S36ATHE3/I reliable?
The price and inventory of SM5S36ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S36ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S36ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S36ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S36ATHE3/I?
SM5S36ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S36ATHE3/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 SM5S36ATHE3/I?
For technical support, including SM5S36ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S36ATHE3/I requirements.
6.How does Aetrix verify that SM5S36ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S36ATHE3/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 SM5S36ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S36ATHE3/I?
All SM5S36ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S36ATHE3/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 SM5S36ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S36ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S36ATHE3/I Tags
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