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Vishay General Semiconductor - Diodes Division SM8S36CAHM3/I
- Part No.:
- SM8S36CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S36CAHM3/I.pdf
- Description:
- 6600 W BI-DIRECTIONAL TVS IS DO-
- Quantity:
- Payment:
- Shipping:
Inventory:2,571
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Product details
Overview
SM8S36CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount PAR® transient voltage suppressor (TVS) in DO-218AC package, featuring 40.0 V minimum breakdown voltage, 36.0 V stand-off voltage, 58.1 V maximum clamping voltage at 114 A peak pulse current, and 6600 W peak pulse power (10/1000 μs), designed for automotive load dump protection.
For engineers reviewing the SM8S36CAHM3/I datasheet, SM8S36CAHM3/I pinout, SM8S36CAHM3/I application, or SM8S36CAHM3/I equivalent, this device delivers AEC-Q101 qualification, TJ = 175 °C operation, ISO 7637-2/16750-2 compliance, low leakage (<10 μA at VWM), and MSL Level 1 reflow capability - critical for high-reliability automotive power rail protection.
Technical Context
This TVS diode operates as a bidirectional clamping device across power rails, triggered when transient voltage exceeds its 40.0–44.2 V breakdown range. Its DO-218AC package integrates a metal heatsink terminal for low thermal resistance (RθJM = 0.35 °C/W), enabling robust energy dissipation during 10/1000 μs surges up to 6600 W.
It exhibits <10 μA reverse leakage at 36.0 V stand-off and maintains stable clamping performance up to +175 °C junction temperature. The device meets automotive surge standards including ISO 7637-2 (load dump) and ISO 16750-2, with halogen-free, RoHS-compliant construction and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 40.0 V min / 42.1 V nom / 44.2 V max - defines precise overvoltage triggering threshold for reliable clamp activation |
| Stand-off Voltage (VWM) | 36.0 V - maximum continuous operating voltage before leakage rises significantly |
| Clamping Voltage (VC) | 58.1 V at 114 A (10/1000 μs) - limits downstream IC voltage stress during transients |
| Peak Pulse Power (PPPM) | 6600 W (10/1000 μs) - sustains high-energy automotive load dump events without failure |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood automotive environments and extended thermal cycling |
| Surge Compliance | ISO 7637-2 & ISO 16750-2 - validated for automotive electrical system transient immunity |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: DO-218AC - surface-mount, bidirectional, metal heatsink case with matte tin-plated terminals; polarity-free (no cathode band); MSL Level 1, 245 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode / Terminal A | One conduction path for bidirectional transient clamping; connected to PCB pad per IPC-7351 footprint |
| Lead 2 / Metal Heatsink | Cathode / Terminal B / Thermal Path | Primary thermal interface to PCB copper pour; provides RθJM = 0.35 °C/W for high-power surge handling |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Protects both positive and negative transients on DC power rails without polarity constraints |
| 175 °C Junction Rating | Enables placement near high-temperature engine control units and power modules without derating |
| Low Leakage Current | <10 μA at 36.0 V ensures minimal standby power loss in always-on automotive circuits |
| DO-218AC Metal Heatsink | Reduces thermal impedance by >90% vs. standard SMC packages, improving surge endurance |
| AEC-Q101 Qualification | Validates reliability for automotive safety-critical power supply protection applications |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Rail |
|---|---|
Use Scenario: Protecting 12 V battery-fed systems during alternator load dump events (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Primary clamping element placed at ECU input stage to limit voltage excursion. Use Value: Clamps to 58.1 V within nanoseconds, preventing damage to MCU, CAN transceivers, and analog sensors. |
Use Scenario: Safeguarding microcontroller and peripheral ICs against coupled transients from fuel injectors or ignition coils. IC Role / Device Role / Timing Role: Fast-response shunt protector on main 5 V/3.3 V regulator input. Use Value: Withstands 114 A peak current and 6600 W surge while maintaining sub-10 μA leakage at nominal rail voltage. |
| Body Control Module (BCM) Power Input | ADAS Camera Power Supply |
Use Scenario: Securing BCM power inputs exposed to relay switching noise and battery disconnection spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive low-energy transients without degradation. Use Value: Stable 36.0 V stand-off and 175 °C operation ensure long-term reliability in hot chassis locations. |
Use Scenario: Shielding image sensor and ISP power lines from ESD and cable discharge events in rear-view cameras. IC Role / Device Role / Timing Role: Bidirectional front-end protection aligned with ISO 10605 and IEC 61000-4-2. Use Value: Halogen-free, RoHS-compliant construction meets automotive material compliance requirements for interior modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/57T | Unidirectional; SMA package; lower PPPM (400 W); VBR = 40.0–44.4 V; no AEC-Q101 qualification | Limited to single-polarity DC rails; unsuitable for load dump where negative transients occur | Select only for cost-sensitive, non-automotive industrial applications with unidirectional bias |
| TPSMD36CA | DO-218AC package; bidirectional; AEC-Q101 qualified; VBR = 40.0–44.4 V; PPPM = 6600 W; same clamping (58.1 V) | Functionally identical but from different manufacturer; minor thermal resistance variation (RθJM = 0.38 °C/W) | Drop-in alternative if SM8S36CAHM3/I lead time is constrained; verify layout compatibility with vendor's footprint |
Compared with SMAJ36A-E3/57T and TPSMD36CA, the SM8S36CAHM3/I offers guaranteed bidirectional operation, automotive-grade qualification, and superior thermal performance (RθJM = 0.35 °C/W), making it the preferred choice for under-hood load dump protection where reliability and polarity independence are mandatory.
Availability
SM8S36CAHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) design, and ADAS camera module development requiring stable component supply and long-term lifecycle support.
Supply support for SM8S36CAHM3/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 protection devices for automotive, industrial, and computing markets.
The SM8S series is part of Vishay's PAR® TVS platform, engineered specifically for high-energy automotive surge suppression with emphasis on AEC-Q101 compliance, 175 °C operation, and DO-218AC thermal efficiency.
FAQ
What is the clamping voltage of SM8S36CAHM3/I at its rated peak pulse current?
The SM8S36CAHM3/I has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated 114 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 4 in the official Vishay datasheet (Doc #98229) and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below downstream IC absolute maximum ratings is essential for robust system-level protection.
Is SM8S36CAHM3/I suitable for 24 V commercial vehicle applications?
Yes, the SM8S36CAHM3/I is suitable for 24 V commercial vehicle applications due to its 36.0 V stand-off voltage and 40.0–44.2 V breakdown range, which provide adequate margin above nominal 24 V system voltage while accommodating normal regulation tolerances. Its 6600 W peak pulse power rating and ISO 7637-2 compliance ensure resilience against heavy-duty load dump transients common in trucks and buses.
Does SM8S36CAHM3/I require a heatsink on the PCB?
No discrete external heatsink is required for the SM8S36CAHM3/I, as its DO-218AC package incorporates an integrated metal heatsink terminal (Lead 2) designed to transfer heat directly into a large PCB copper pour. When mounted per Vishay's recommended footprint - including ≥100 mm² thermal pad connected via multiple vias - the device achieves RθJM = 0.35 °C/W, enabling full 6600 W surge capability without auxiliary cooling.
How does the HM3 suffix affect SM8S36CAHM3/I's compliance status?
The HM3 suffix in SM8S36CAHM3/I indicates halogen-free, RoHS-compliant, Pb-free termination, AEC-Q101 qualification, and JESD 201 Class 2 whisker resistance. It confirms full automotive-grade material compliance and process control - distinct from industry-grade variants lacking the "H" prefix. This suffix is critical for Tier 1 automotive BOM acceptance and long-term supply assurance.
Can SM8S36CAHM3/I replace older SM8S36A variants in existing designs?
Yes, SM8S36CAHM3/I is a direct replacement for earlier SM8S36A variants with HM3 suffix, sharing identical electrical specs, DO-218AC mechanical outline, and thermal performance. However, designers must verify that the "CA" (bidirectional) version matches the original polarity requirement - unidirectional "A" variants are not interchangeable. Layout and solder profile remain unchanged.
SM8S36CAHM3/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:
- -
- Bidirectional Channels:
- 1
- 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
SM8S36CAHM3/I FAQ
1.How can I place an order for SM8S36CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S36CAHM3/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 SM8S36CAHM3/I reliable?
The price and inventory of SM8S36CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S36CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM8S36CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S36CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S36CAHM3/I?
SM8S36CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S36CAHM3/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 SM8S36CAHM3/I?
For technical support, including SM8S36CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S36CAHM3/I requirements.
6.How does Aetrix verify that SM8S36CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM8S36CAHM3/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 SM8S36CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM8S36CAHM3/I?
All SM8S36CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S36CAHM3/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 SM8S36CAHM3/I part is unused and in its original packaging.
Return procedure for SM8S36CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S36CAHM3/I Tags
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