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Vishay General Semiconductor - Diodes Division SM5S12HE3/2D
- Part No.:
- SM5S12HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S12HE3/2D.pdf
- Description:
- TVS DIODE 12VWM 22VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,566
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Product details
Overview
SM5S12HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in 12 V systems. It features a 13.3 V minimum breakdown voltage (VBR), 12.0 V standoff voltage (VWM), 22.0 V maximum clamping voltage at 164 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood reliability.
For engineers reviewing the SM5S12HE3/2D datasheet, SM5S12HE3/2D pinout, SM5S12HE3/2D application, or SM5S12HE3/2D equivalent, this device is selected for high-surge, high-temperature automotive power rail protection where low leakage (<10 µA at VWM), TJ = 175 °C operation, and DO-218AB package thermal performance are critical design requirements.
Technical Context
The SM5S12HE3/2D employs passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and elevated junction temperatures up to 175 °C. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to PCB copper planes for enhanced thermal dissipation.
It meets ISO 7637-2 load dump test conditions with 10 ms exponential waveform capability and complies with J-STD-020 MSL Level 1 (245 °C peak reflow), supporting robust automated assembly in automotive electronics production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 12 V nominal automotive systems. |
| VBR (min/max) | 13.3 V / 16.3 V - Breakdown voltage range at 5 mA test current; ensures reliable triggering above normal system transients but below component damage thresholds. |
| VC @ IPPM | 22.0 V - Clamping voltage at 164 A (10/1000 µs); limits downstream IC voltage stress during load dump events. |
| PPPM (10/1000 µs) | 3600 W - Peak pulse power handling; supports compliance with ISO 7637-2 Pulse 5a/b load dump waveforms. |
| IFSM | 500 A - Peak forward surge current (8.3 ms half-sine); enables survival of high-energy battery connection transients. |
| TJ max | 175 °C - Maximum junction temperature; allows placement near heat sources (e.g., power modules) without derating concerns. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables effective heat transfer to heatsink or PCB copper when mounted anode-down. |
Pinout & Package
Package: DO-218AB - Surface-mount, anode-heatsink configuration with matte tin-plated leads; UL 94 V-0 molding compound; JEDEC-compliant footprint optimized for thermal conduction via metal heatsink terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Anode) | Surge current entry point | Connected to protected line (e.g., battery rail); must be routed to low-inductance path to ground reference. |
| Lead 2 / Metal Heatsink | Cathode / Thermal interface | Electrically cathode and primary thermal path; requires direct soldering to large copper pour or external heatsink for RθJC = 1.0 °C/W performance. |
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 parameter drift over time and under high humidity/high temperature bias, improving long-term clamping stability. |
| MSL Level 1 rating | Enables single-pass reflow at 245 °C peak without popcorn or delamination risk-no baking required prior to assembly. |
| Low ID at VWM | <10 µA at 12 V and 25 °C; minimizes standby power loss in always-on vehicle modules (e.g., body control units). |
| ISO 7637-2 compliance | Validated for Pulse 5a (load dump) with 10 ms exponential waveform; meets OEM requirements for 12 V power net protection. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects 12 V supply rails during alternator load dump events (up to 40 V, 400 ms duration) in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed at main power input stage to clamp surges before they reach DC/DC converters and microcontrollers. Use Value: Limits clamped voltage to ≤22.0 V at 164 A, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic and analog circuitry. |
Use Scenario: Safeguards ECU main power input against battery disconnection/reconnection spikes and alternator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on the 12 V input bus, operating in parallel with bulk capacitance and upstream fusing. Use Value: Withstands 500 A non-repetitive surge (8.3 ms) and maintains <10 µA leakage at 12 V, ensuring minimal impact on ECU sleep-mode current budget. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Supply |
Use Scenario: Secures BCM 12 V input against inductive switching noise from door lock actuators, window motors, and lighting loads. IC Role / Device Role / Timing Role: Fast-response transient suppressor located adjacent to connector entry point to minimize PCB trace inductance effects. Use Value: Achieves 22.0 V clamping within nanoseconds, reducing voltage overshoot that could disrupt CAN transceivers or LIN bus communication interfaces. |
Use Scenario: Shields 12 V camera module power input from ignition transients and load dump in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Front-line protection device mounted directly at power connector, leveraging DO-218AB's low-inductance heatsink terminal. Use Value: Operates reliably at TJ = 175 °C, enabling placement near heat-generating image sensors without thermal derating of surge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/5AT | DO-214AC (SMA) package; lower PPPM (400 W); VC = 19.9 V @ 21.2 A; no AEC-Q101 qualification. | Rated for industrial/commercial use only; not validated for automotive temperature cycling or load dump waveform stress. | Select when cost sensitivity outweighs automotive qualification and surge energy requirements are ≤400 W. |
| 1.5SMC12A | DO-214AB (SMC) package; PPPM = 1500 W; VC = 19.9 V @ 75.4 A; AEC-Q101 qualified but higher RθJC (3.0 °C/W). | Lower surge capacity and reduced thermal efficiency limit use in high-power load dump scenarios requiring >2800 W (10/10k µs). | Choose where board space permits larger SMC footprint and thermal management relies more on ambient convection than heatsink coupling. |
Compared with SMAJ12A-E3/5AT and 1.5SMC12A, the SM5S12HE3/2D delivers 2.4× higher peak pulse power (3600 W vs. 1500 W/400 W), superior thermal resistance (1.0 °C/W), and full AEC-Q101 validation-making it the only option among the three qualified for under-hood automotive load dump protection per ISO 7637-2.
Availability
SM5S12HE3/2D is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power inputs, and body control module (BCM) power rail designs requiring stable component supply across extended temperature and high-surge environments.
Supply support for SM5S12HE3/2D 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SM5S series is part of Vishay's PAR® (Planar Anisotropic Rectifier) TVS platform, engineered specifically for automotive-grade transient suppression with emphasis on high-temperature stability, low leakage, and ISO 7637-2 compliance.
FAQ
What is the clamping voltage of the SM5S12HE3/2D at its rated peak pulse current?
The SM5S12HE3/2D has a maximum clamping voltage (VC) of 22.0 V at its peak pulse current (IPPM) of 164 A under a 10/1000 µs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number: 88382, Rev. 22-Jul-16). The SM5S12HE3/2D uses passivated anisotropic rectifier technology to maintain consistent clamping performance across temperature and lifetime.
Is the SM5S12HE3/2D qualified for automotive applications?
Yes, the SM5S12HE3/2D is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C junction temperature. It meets ISO 7637-2 load dump requirements and is manufactured with MSL Level 1 process control-making it suitable for under-hood automotive applications such as ECUs, BCMs, and ADAS modules. The SM5S12HE3/2D carries the HE3 suffix confirming RoHS compliance and whisker resistance per JESD 201 Class 2.
What package type does the SM5S12HE3/2D use, and how is it mounted?
The SM5S12HE3/2D uses the DO-218AB surface-mount package with a metal heatsink terminal serving as the cathode. Lead 1 is the anode; the metal heatsink (Lead 2) must be soldered directly to a large copper area or external heatsink to achieve the specified RθJC of 1.0 °C/W. Mounting orientation places the anode toward the protected line and the heatsink toward ground or thermal plane.
Does the SM5S12HE3/2D have unidirectional or bidirectional polarity?
The SM5S12HE3/2D is unidirectional only, with polarity defined as anode-to-heatsink (cathode). It conducts only during positive transients on the anode relative to the heatsink/cathode terminal. This configuration is optimized for protecting positive 12 V supply rails against load dump and inductive switching surges. Bidirectional variants are not offered in the SM5S12HE3/2D family.
What is the maximum peak pulse power rating for the SM5S12HE3/2D?
The SM5S12HE3/2D is rated for 3600 W peak pulse power (PPPM) using the standard 10/1000 µs double-exponential waveform. It also supports 2800 W under the longer 10/10 000 µs waveform, aligning with ISO 7637-2 Pulse 5b test conditions. These ratings are confirmed in the Vishay SM5S10–SM5S36A datasheet and apply to the SM5S12HE3/2D at TA = 25 °C with proper thermal management.
SM5S12HE3/2D 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 164A
- 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
SM5S12HE3/2D FAQ
1.How can I place an order for SM5S12HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S12HE3/2D 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 SM5S12HE3/2D reliable?
The price and inventory of SM5S12HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S12HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S12HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S12HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S12HE3/2D?
SM5S12HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S12HE3/2D 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 SM5S12HE3/2D?
For technical support, including SM5S12HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S12HE3/2D requirements.
6.How does Aetrix verify that SM5S12HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S12HE3/2D 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 SM5S12HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S12HE3/2D?
All SM5S12HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S12HE3/2D, 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 SM5S12HE3/2D part is unused and in its original packaging.
Return procedure for SM5S12HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S12HE3/2D Tags
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