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Vishay General Semiconductor - Diodes Division SM5S11AHM3/I
- Part No.:
- SM5S11AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S11AHM3/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,349
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Product details
Overview
SM5S11AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 11.1 V to 13.5 V breakdown voltage (VBR), 11 V stand-off voltage (VWM), 3600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive load dump protection.
For engineers reviewing the SM5S11AHM3/I datasheet, SM5S11AHM3/I pinout, SM5S11AHM3/I application, or SM5S11AHM3/I equivalent, this device supports high-reliability 175 °C junction operation, low leakage (<10 μA at VWM), and ISO7637-2 compliance - critical for under-hood automotive electronics and industrial power rail clamping.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with heatsink-as-anode polarity, enabling robust clamping during 10/1000 μs transients up to 150 A peak pulse current while maintaining ≤18.2 V clamping voltage (VC) at rated IPPM. Its MSL Level 1 rating and 245 °C lead-free solder compatibility support automated SMT assembly.
The device operates across -55 °C to +175 °C junction temperature range, exhibits 0.072 %/°C VBR temperature coefficient, and delivers 5 W steady-state power dissipation on infinite heatsink - optimized for sustained surge handling in automotive power distribution modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 12.2 V / 12.9 V / 13.5 V - defines precise clamping onset threshold under 5 mA test current |
| VWM | 11 V - maximum continuous reverse working voltage before leakage exceeds 10 μA |
| VC @ IPPM | 18.2 V - clamped voltage at 150 A peak pulse ensures downstream ICs remain below absolute max ratings |
| PPPM (10/1000 μs) | 3600 W - enables single-event suppression of severe load dump surges per ISO7637-2 |
| TJ max | +175 °C - supports placement near high-temperature engine control units without derating |
| Leakage @ VWM, 25 °C | <10 μA - minimizes standby power loss in always-on vehicle subsystems |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-218AB - molded surface-mount case with metal heatsink acting as anode terminal; meets UL 94 V-0, RoHS-compliant, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | High-current return path and thermal interface | Must be soldered to large copper area for RθJM = 0.45 °C/W thermal performance |
| Cathode (Lead 1) | Transient voltage sensing and clamping node | Connected to protected line (e.g., battery rail); carries full surge current during clamp event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable VBR and low leakage over lifetime at 175 °C junction temperature |
| Unidirectional polarity | Optimized for DC-biased automotive rails where reverse conduction is not required |
| ISO7637-2 compliance | Validated for load dump waveform testing (10 ms exponential) up to 3200 W at 125 °C initial TJ |
| MSL Level 1 | Allows unlimited floor life and reflow at 245 °C peak without preconditioning |
| Low forward voltage drop | VF ≤ 2.0 V at 100 A pulse ensures minimal conduction loss during surge events |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Rail |
|---|---|
Use Scenario: Suppresses 12 V system load dump transients (up to 40 V, 100 ms) caused by alternator field-circuit interruption. IC Role / Device Role / Timing Role: Primary clamping device placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤18.2 V during 150 A surge, preventing damage to 24 V-rated buck controllers and microcontrollers. |
Use Scenario: Protects ECU main 5 V/3.3 V supply rails from coupled transients originating from solenoid drivers and ignition coils. IC Role / Device Role / Timing Role: Secondary TVS located after bulk filtering, providing fast-response overvoltage shutdown before LDOs or PMICs. Use Value: Sub-10 ns response time and 0.072 %/°C VBR stability ensure consistent clamping across under-hood temperature swings (-40 °C to +150 °C). |
| Body Control Module (BCM) Input Protection | Industrial 24 V PLC I/O Channel |
Use Scenario: Shields BCM LIN/CAN bus power inputs from inductive switching noise generated by door lock actuators and window motors. IC Role / Device Role / Timing Role: Standoff-rated protector on 12 V auxiliary rail feeding CAN transceivers and sensor interfaces. Use Value: 11 V VWM allows normal operation while blocking >12.2 V transients; <10 μA leakage preserves sleep-mode current budget. |
Use Scenario: Guards programmable logic controller digital input channels against field-wiring induced surges in factory automation environments. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V optocoupler input circuitry. Use Value: 3600 W PPPM withstands repeated 1 kV/500 A surge events per IEC 61000-4-5; DO-218AB footprint supports high-current PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S11AHM3 | Same electrical specs and DO-218AB package; differs only in packaging - no /I suffix means no tape-and-reel orientation marking (anode direction not indicated on reel) | Acceptable where automated pick-and-place does not require sprocket-hole-aligned anode orientation | Select SM5S11AHM3/I when anode-toward-sprocket-hole tape orientation is required for vision-guided placement verification. |
| SMAJ11AHE3/A | Lower PPPM (400 W), SMA package (smaller thermal mass), higher VC (18.2 V → 19.0 V), same VBR range | Suitable for lower-energy transients; not rated for ISO7637-2 load dump or 175 °C operation | Choose SMAJ11AHE3/A only for cost-sensitive non-automotive applications with <50 A surge requirements and ambient <125 °C. |
Compared with SM5S11AHM3/I, SM5S11AHM3 offers identical protection performance but lacks reel orientation marking, while SMAJ11AHE3/A provides reduced surge capability and thermal robustness - making SM5S11AHM3/I the sole choice for AEC-Q101-compliant, high-power automotive load dump protection.
Availability
SM5S11AHM3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power rail clamping, and industrial 24 V PLC I/O channel surge suppression requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM5S11AHM3/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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The SM5SxxA family was developed specifically for automotive load dump and ISO7637-2 transient suppression, featuring DO-218AB packaging optimized for thermal performance and AEC-Q101 validation across -55 °C to +175 °C operation.
FAQ
What is the clamping voltage of SM5S11AHM3/I at its rated peak pulse current?
The SM5S11AHM3/I has a maximum clamping voltage (VC) of 18.2 V at its rated peak pulse current (IPPM) of 150 A under 10/1000 μs waveform conditions. This value is guaranteed per the Vishay datasheet and ensures protected downstream circuitry remains within safe operating limits during surge events. The SM5S11AHM3/I maintains this clamping performance across its full operating temperature range.
Is SM5S11AHM3/I suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SM5S11AHM3/I is explicitly AEC-Q101 qualified per the Vishay datasheet, with validation covering temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) testing. Its 175 °C maximum junction temperature rating and ISO7637-2 compliance make SM5S11AHM3/I appropriate for under-hood automotive modules including ECUs, body control units, and ADAS power supplies.
What does the "/I" suffix indicate in SM5S11AHM3/I?
The "/I" suffix in SM5S11AHM3/I denotes tape-and-reel packaging with anode orientation toward the sprocket hole - a requirement for vision-guided automated placement systems that verify terminal alignment. This marking ensures correct anode-heatsink orientation during SMT assembly, unlike the base SM5S11AHM3 which lacks orientation marking. Both share identical electrical and thermal specifications.
How does SM5S11AHM3/I compare to standard SMAJ series TVS diodes?
SM5S11AHM3/I delivers 3600 W peak pulse power (10/1000 μs), nine times higher than SMAJ11AHE3/A's 400 W rating, and supports 175 °C operation versus SMAJ's 150 °C limit. It also meets ISO7637-2 load dump requirements and carries AEC-Q101 qualification - features absent in the SMAJ series. For high-energy automotive transients, SM5S11AHM3/I is not interchangeable with SMAJ11AHE3/A.
What is the thermal resistance from junction to mount (RθJM) for SM5S11AHM3/I?
The SM5S11AHM3/I has a typical junction-to-mount thermal resistance (RθJM) of 0.45 °C/W when mounted on a thermally optimized heatsink pad, as specified in the Vishay datasheet. This low value enables efficient heat transfer from the silicon junction through the metal heatsink terminal, supporting sustained 5 W power dissipation and high-reliability operation at 175 °C junction temperature. Proper PCB copper area design is essential to achieve this RθJM.
SM5S11AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 198A
- 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
SM5S11AHM3/I FAQ
1.How can I place an order for SM5S11AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S11AHM3/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 SM5S11AHM3/I reliable?
The price and inventory of SM5S11AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S11AHM3/I is usually 5 days.
3.What payment methods are accepted for SM5S11AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S11AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S11AHM3/I?
SM5S11AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S11AHM3/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 SM5S11AHM3/I?
For technical support, including SM5S11AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S11AHM3/I requirements.
6.How does Aetrix verify that SM5S11AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM5S11AHM3/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 SM5S11AHM3/I meets industry standards.
7.What is the process for return or replacement of SM5S11AHM3/I?
All SM5S11AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S11AHM3/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 SM5S11AHM3/I part is unused and in its original packaging.
Return procedure for SM5S11AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S11AHM3/I Tags
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