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Vishay General Semiconductor - Diodes Division SM8S14A-7001HE4/2N
- Part No.:
- SM8S14A-7001HE4/2N
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S14A-7001HE4/2N.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,105
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Product details
Overview
SM8S14A-7001HE4/2N from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 15.6 V minimum breakdown voltage (VBR), 14.0 V maximum stand-off voltage (VWM), 284 A peak pulse current (IPPM) under 10/1000 µs waveform, 23.2 V clamping voltage (VC), and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the SM8S14A-7001HE4/2N datasheet, SM8S14A-7001HE4/2N pinout, SM8S14A-7001HE4/2N application, or SM8S14A-7001HE4/2N equivalent, key selection criteria include its DO-218AB package thermal performance (RθJC = 0.90 °C/W), 175 °C junction temperature rating, 6600 W peak pulse power capability, and compliance with ISO7637-2 surge testing requirements.
Technical Context
The SM8S14A-7001HE4/2N employs passivated anisotropic rectifier technology to deliver stable clamping behavior across temperature extremes. Its unidirectional polarity and heatsink-as-anode configuration enable direct mounting to PCB copper planes for efficient thermal dissipation in high-power transients.
It is rated for 700 A non-repetitive forward surge current (IFSM) at 8.3 ms and maintains low leakage (<10 µA at VWM) up to 175 °C junction temperature - critical for engine control units and battery management systems exposed to harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 15.6 V / 17.2 V - defines reliable conduction onset range under test current of 5.0 mA |
| VWM | 14.0 V - maximum continuous reverse operating voltage before significant leakage |
| VC @ IPPM | 23.2 V - clamped voltage during 284 A transient, limiting downstream IC stress |
| PPPM (10/1000 µs) | 6600 W - peak surge power handling capacity for load dump events |
| TJ max. | 175 °C - enables operation in under-hood locations without derating penalties |
| RθJC | 0.90 °C/W - supports high-power dissipation when mounted on ≥1 in² copper heatsink |
Pinout & Package
Package: DO-218AB - surface-mount, anode-heatsink configuration with matte tin-plated leads; meets UL 94 V-0, MSL Level 1, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Primary current entry point; electrically connected to metal heatsink tab |
| Lead 2 / Metal Heatsink | Cathode | Current return path; large-area thermal interface for PCB copper plane attachment |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable VBR and low leakage over 175 °C lifetime operation |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics applications |
| ISO7637-2 compliance | Meets automotive load dump surge immunity requirements per test condition |
| Low forward voltage drop | VF ≤ 1.8 V at 100 A ensures minimal conduction loss during clamping |
Applications
| Engine Control Unit (ECU) Protection | Automotive Battery Management System (BMS) |
|---|---|
Use Scenario: Protects microcontroller and CAN transceiver inputs from 12 V system load dump surges during alternator regulation failure. IC Role / Device Role / Timing Role: Primary clamping device placed at main power input rail before DC-DC converters. Use Value: Limits transient voltage to ≤23.2 V while absorbing 6600 W pulses, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Shields cell monitoring ICs and isolation amplifiers from battery line transients during jump-start or cold-crank events. IC Role / Device Role / Timing Role: Unidirectional TVS on high-side battery sense line, referenced to chassis ground. Use Value: Maintains <10 µA leakage at 14.0 V VWM across full temperature range, preserving measurement accuracy. |
| Body Control Module (BCM) Power Input | ADAS Camera Power Rail |
Use Scenario: Safeguards LIN bus transceivers and power MOSFET drivers against switching noise from solenoid loads (e.g., door locks, HVAC actuators). IC Role / Device Role / Timing Role: Fast-response clamping element located adjacent to input filter capacitor. Use Value: Responds within nanoseconds to clamp spikes to 23.2 V, preventing false resets or communication errors in LIN nodes. | Use Scenario: Secures 5 V or 3.3 V camera module power supply against ignition-induced transients in rear-view or surround-view systems. IC Role / Device Role / Timing Role: Secondary protection stage after primary DC-DC converter, mounted directly on camera flex PCB. Use Value: DO-218AB package allows direct thermal coupling to metal housing, sustaining 175 °C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/5AT | Lower PPPM (400 W), SMA package, RθJC = 40 °C/W, no AEC-Q101 | Limited to low-energy consumer or industrial I/O protection; unsuitable for automotive load dump | Select only for cost-sensitive non-automotive designs where 6600 W surge immunity is unnecessary |
| TPSMD14A | Same DO-218AB package, 15.6–17.2 V VBR, but lower IPPM (250 A), 5000 W PPPM, AEC-Q101 qualified | Acceptable for lower-energy transients (e.g., ESD + minor switching noise), not full ISO7637-2 load dump | Use where space-constrained layout requires identical footprint but surge energy is reduced by upstream filtering |
Compared with SMAJ14A-E3/5AT and TPSMD14A, the SM8S14A-7001HE4/2N delivers 16.5× higher peak pulse power and superior thermal resistance - enabling robust protection in high-energy automotive power rails without external heatsinking.
Availability
SM8S14A-7001HE4/2N is available at Aetrix Electronics and suitable for automotive engine control units, battery management systems, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SM8S14A-7001HE4/2N 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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SM8S series is engineered specifically for automotive-grade transient suppression, with emphasis on high-temperature stability, AEC-Q101 qualification, and ISO7637-2 compliance - targeting under-hood power rail protection where thermal and surge resilience are critical.
FAQ
What is the maximum clamping voltage of the SM8S14A-7001HE4/2N during a 10/1000 µs surge event?
The SM8S14A-7001HE4/2N has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 284 A under a 10/1000 µs waveform. This value is measured at TC = 25 °C and ensures downstream components remain within safe operating voltage limits during automotive load dump events. The SM8S14A-7001HE4/2N maintains this clamping performance across its full -55 °C to +175 °C operating junction temperature range.
Is the SM8S14A-7001HE4/2N qualified for automotive applications?
Yes, the SM8S14A-7001HE4/2N is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 surge test requirements for load dump protection and operates reliably from -55 °C to +175 °C junction temperature. Its DO-218AB package supports direct thermal mounting to PCB copper, making it suitable for engine control units, battery management systems, and other under-hood electronics where the SM8S14A-7001HE4/2N is deployed as primary transient suppression.
What does the "HE4/2N" suffix indicate in SM8S14A-7001HE4/2N?
The "HE4/2N" suffix denotes Vishay's packaging and revision coding: "HE4" specifies RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads and JESD201 Class 2 whisker resistance; "2N" indicates 13-inch plastic tape-and-reel delivery with 750 units per reel and anode orientation toward sprocket holes. This exact configuration ensures consistent assembly and thermal performance for the SM8S14A-7001HE4/2N in automated SMT lines.
How does the DO-218AB package of the SM8S14A-7001HE4/2N improve thermal performance compared to SMA or SMB packages?
The DO-218AB package of the SM8S14A-7001HE4/2N provides a thermal resistance of RθJC = 0.90 °C/W - over 40× lower than standard SMA packages (~40 °C/W). Its metal heatsink terminal enables direct soldering to large PCB copper areas, allowing the SM8S14A-7001HE4/2N to dissipate 6600 W surges without external heatsinks. This architecture is essential for sustained operation in high-temperature automotive environments where the SM8S14A-7001HE4/2N serves as front-line protection.
Can the SM8S14A-7001HE4/2N be used in bidirectional configurations?
No, the SM8S14A-7001HE4/2N is unidirectional only, with polarity defined as anode-to-heatsink and cathode-to-lead. It is not rated for reverse-biased operation beyond its specified VWM of 14.0 V. For bidirectional transient protection, a separate symmetric TVS array or back-to-back configuration would be required - the SM8S14A-7001HE4/2N must be oriented correctly in-circuit to function as intended in automotive power rail applications.
SM8S14A-7001HE4/2N 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:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 284A
- 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
SM8S14A-7001HE4/2N FAQ
1.How can I place an order for SM8S14A-7001HE4/2N through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S14A-7001HE4/2N 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 SM8S14A-7001HE4/2N reliable?
The price and inventory of SM8S14A-7001HE4/2N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S14A-7001HE4/2N is usually 5 days.
3.What payment methods are accepted for SM8S14A-7001HE4/2N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S14A-7001HE4/2N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S14A-7001HE4/2N?
SM8S14A-7001HE4/2N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S14A-7001HE4/2N 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 SM8S14A-7001HE4/2N?
For technical support, including SM8S14A-7001HE4/2N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S14A-7001HE4/2N requirements.
6.How does Aetrix verify that SM8S14A-7001HE4/2N is sourced from the original manufacturer or authorized distributors?
All SM8S14A-7001HE4/2N 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 SM8S14A-7001HE4/2N meets industry standards.
7.What is the process for return or replacement of SM8S14A-7001HE4/2N?
All SM8S14A-7001HE4/2N units undergo pre-shipment inspection (PSI). If there is an issue with SM8S14A-7001HE4/2N, 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 SM8S14A-7001HE4/2N part is unused and in its original packaging.
Return procedure for SM8S14A-7001HE4/2N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S14A-7001HE4/2N Tags
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