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Vishay General Semiconductor - Diodes Division SM5S14HE3/2D
- Part No.:
- SM5S14HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S14HE3/2D.pdf
- Description:
- TVS DIODE 14VWM 25.8VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,419
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Product details
Overview
SM5S14HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 14.0 V stand-off voltage (VWM), 15.6–19.1 V breakdown range (VBR), 25.8 V clamping voltage at 140 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the SM5S14HE3/2D datasheet, SM5S14HE3/2D pinout, SM5S14HE3/2D application, or SM5S14HE3/2D equivalent, this device is selected for high-reliability 12 V automotive power rail protection where junction temperature up to 175 °C, low leakage (<10 µA at VWM), and ISO7637-2 compliance are required.
Technical Context
The SM5S14HE3/2D employs passivated anisotropic rectifier technology optimized for high-temperature stability and surge robustness. Its unidirectional polarity and heatsink-as-anode configuration enable direct mounting to thermal planes in automotive ECUs and body control modules.
It delivers 3600 W peak pulse power under 10/1000 µs waveform with 1.0 °C/W junction-to-case thermal resistance, supporting sustained operation at TC = 125 °C while maintaining clamping performance below 26 V - critical for safeguarding 12 V CAN/LIN transceivers and microcontrollers against load dump transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14.0 V - Maximum continuous reverse operating voltage before conduction; sets threshold for 12 V system protection without false triggering. |
| VBR (min/max) | 15.6 V / 19.1 V - Breakdown occurs within this range at 5 mA test current; ensures reliable turn-on during transients above nominal rail. |
| VC @ IPPM | 25.8 V - Clamping voltage at 140 A peak pulse (10/1000 µs); limits downstream IC stress to safe levels during load dump events. |
| PPPM (10/1000 µs) | 3600 W - Peak surge power handling capability; meets ISO7637-2 Pulse 5a requirements for 12 V automotive systems. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables placement near heat sources in engine compartment applications. |
| ID @ VWM | <10 µA at 25 °C - Low reverse leakage preserves battery life in always-on vehicle modules such as alarm controllers or telematics. |
| Package | DO-218AB - Surface-mount case with metal heatsink terminal (anode), optimized for PCB thermal dissipation and automated assembly. |
Pinout & Package
SM5S14HE3/2D uses the DO-218AB package: a two-terminal surface-mount device with Lead 1 (cathode) and Lead 2/metal heatsink (anode). The heatsink serves as both electrical anode connection and primary thermal path to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected line (e.g., battery feed); conducts transient current to ground/anode during overvoltage event. |
| Lead 2 / Metal Heatsink | Anode | Electrically tied to system ground or chassis; provides low-impedance thermal path to PCB copper pour for sustained power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Junction passivation | Optimized anisotropic rectifier die structure reduces parameter drift over time and temperature, ensuring stable VBR across 175 °C lifetime operation. |
| MSL Level 1 | Rated for reflow soldering up to 245 °C peak, eliminating moisture sensitivity concerns during standard SMT assembly. |
| ISO7637-2 compliant | Validated against Load Dump (Pulse 5a) and other automotive transient waveforms - no additional external filtering needed for basic compliance. |
| Low VF | Max 2.0 V forward voltage at 100 A surge ensures minimal conduction loss during high-current clamping, reducing localized heating. |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Battery Feed |
|---|---|
Use Scenario: Protects ECU main 12 V input against alternator load dump spikes during battery disconnect or regulator failure. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transients to ≤25.8 V within nanoseconds, shielding MCU, CAN transceivers, and voltage regulators. Use Value: Enables direct integration into compact ECU PCBs without derating - validated for 175 °C ambient and repeated 3600 W surges. |
Use Scenario: Safeguards BCM power rail from ignition-induced switching transients and jump-start surges. IC Role / Device Role / Timing Role: Acts as first-line overvoltage clamp on fused battery feed, preventing latch-up or damage to LIN drivers and power switches. Use Value: Sub-10 µA leakage at 14 V minimizes standby current draw in always-on modules, extending vehicle sleep-mode battery life. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Shields front/rear camera modules powered from vehicle battery against cold-crank and load dump events. IC Role / Device Role / Timing Role: Fast-response TVS suppresses transients before they reach image sensor and ISP power domains. Use Value: DO-218AB package allows direct heatsink mounting to aluminum housing, enabling thermal management in space-constrained camera enclosures. |
Use Scenario: Protects H-bridge gate drivers and current sense amplifiers in EPS motor control units from inductive kickback and load dump. IC Role / Device Role / Timing Role: Clamps supply rail to ≤25.8 V during 100+ A transients, preserving functional safety integrity of ASIL-B/C subsystems. Use Value: AEC-Q101 qualification and 175 °C TJ rating ensure long-term reliability in high-temperature EPS environments near steering column. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5A (Vishay) | DO-214AC (SMA) package; lower PPPM (400 W); VBR = 15.6–17.2 V; same VWM (14 V). | Not rated for 175 °C operation; limited to 150 °C TJ; not AEC-Q101 qualified. | Select when cost-sensitive consumer or industrial designs require basic 14 V clamping without automotive thermal or qualification requirements. |
| 1.5KE15A (ON Semiconductor) | Through-hole DO-201 package; 1500 W PPPM (10/1000 µs); VBR = 15.6–17.2 V; VWM = 14 V. | Larger footprint; incompatible with automated SMT lines; lacks MSL Level 1 and AEC-Q101 certification. | Choose only for legacy through-hole designs or prototyping where board real estate and reflow compatibility are not constraints. |
Compared with SMAJ14A-E3/5A and 1.5KE15A, the SM5S14HE3/2D uniquely combines SMT compatibility, 3600 W surge rating, AEC-Q101 qualification, and 175 °C operation - making it the only option suitable for production automotive power rail protection requiring zero layout change and full specification compliance.
Availability
SM5S14HE3/2D is available at Aetrix Electronics and suitable for automotive electronic control units, body control modules, ADAS camera systems, and electric power steering units requiring stable component supply with guaranteed AEC-Q101 compliance and thermal performance up to 175 °C.
Supply support for SM5S14HE3/2D 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® TVS platform, engineered specifically for automotive load dump and inductive switching transient suppression in 12 V and 24 V systems - emphasizing thermal robustness, surge consistency, and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the SM5S14HE3/2D at its rated peak pulse current?
The SM5S14HE3/2D has a maximum clamping voltage (VC) of 25.8 V at its specified peak pulse current (IPPM) of 140 A under the 10/1000 µs waveform. This value is measured per the conditions defined in the Vishay datasheet 88382 and ensures downstream circuitry remains within safe operating limits during automotive load dump events. The SM5S14HE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM5S14HE3/2D suitable for 24 V automotive systems?
No, the SM5S14HE3/2D is designed specifically for 12 V nominal automotive systems. Its 14.0 V stand-off voltage (VWM) and 15.6–19.1 V breakdown range align with ISO7637-2 Pulse 5a requirements for 12 V networks. For 24 V systems, Vishay offers higher-voltage variants such as SM5S24HE3/2D (VWM = 24.0 V) or SM5S28HE3/2D (VWM = 28.0 V). Using SM5S14HE3/2D in a 24 V system would result in continuous conduction and device failure.
Does the SM5S14HE3/2D have bidirectional polarity?
No, the SM5S14HE3/2D is unidirectional only, as explicitly stated in the Vishay datasheet. Its polarity is fixed: Lead 1 is cathode and Lead 2/metal heatsink is anode. This configuration supports protection of positive-rail transients only. Bidirectional variants (e.g., SM5S14AY) are separate part numbers and not interchangeable with SM5S14HE3/2D due to different internal construction and testing.
What does the "HE3/2D" suffix indicate in SM5S14HE3/2D?
The "HE3" suffix denotes RoHS-compliant, matte tin-plated leads that meet JESD201 Class 2 whisker resistance, while "/2D" specifies the packaging: 13-inch plastic tape and reel with 750 units per reel and anode oriented toward the sprocket hole. This packaging format ensures compatibility with high-speed pick-and-place equipment and supports automated SMT assembly of the SM5S14HE3/2D in automotive production lines.
How is thermal management handled for the SM5S14HE3/2D in high-power applications?
The SM5S14HE3/2D relies on its metal heatsink terminal (anode) for primary thermal conduction. With a typical junction-to-case thermal resistance (RθJC) of 1.0 °C/W, effective PCB copper pour design beneath the heatsink is essential. Vishay recommends minimum 100 mm² of 2 oz copper connected directly to the heatsink pad. The SM5S14HE3/2D achieves full 3600 W rating only when mounted to sufficient copper area - undersized layouts will thermally derate its surge capability.
SM5S14HE3/2D 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 140A
- 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
SM5S14HE3/2D FAQ
1.How can I place an order for SM5S14HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S14HE3/2D 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 SM5S14HE3/2D reliable?
The price and inventory of SM5S14HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S14HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S14HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S14HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S14HE3/2D?
SM5S14HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S14HE3/2D 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 SM5S14HE3/2D?
For technical support, including SM5S14HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S14HE3/2D requirements.
6.How does Aetrix verify that SM5S14HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S14HE3/2D 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 SM5S14HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S14HE3/2D?
All SM5S14HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S14HE3/2D, 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 SM5S14HE3/2D part is unused and in its original packaging.
Return procedure for SM5S14HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S14HE3/2D Tags
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