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Vishay General Semiconductor - Diodes Division SMA5J12CHE3/5A
- Part No.:
- SMA5J12CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J12CHE3/5A.pdf
- Description:
- TVS DIODE 12VWM 22VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,430
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Product details
Overview
SMA5J12CHE3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on signal and power lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 19.9 V clamping voltage at 25.1 A peak pulse current, and 500 W peak pulse power dissipation with 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J12CHE3/5A datasheet, SMA5J12CHE3/5A pinout, SMA5J12CHE3/5A application, or SMA5J12CHE3/5A equivalent, key selection criteria include bi-directional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant HE3 suffix, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both forward and reverse directions, enabling robust protection against voltage transients induced by inductive load switching or ESD events without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
The device delivers 500 W peak pulse power handling per 10/1000 µs waveform at 25 °C, derating linearly above TA = 25 °C per Vishay's Fig. 2, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating window for protected circuitry |
| VBR min/max | 13.3 V / 14.7 V - breakdown voltage range at 1 mA test current; ensures predictable turn-on under surge conditions |
| VC @ IPPM | 19.9 V at 25.1 A - clamping voltage during 10/1000 µs surge; limits downstream voltage stress to safe levels |
| PPPM | 500 W - peak pulse power rating; determines survivability against standardized lightning/surge waveforms |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and industrial environments |
| Package | DO-214AC (SMA) - surface-mount package with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with J-STD-020 MSL Level 1 |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking (bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional surge path | Both terminals function identically; symmetrical conduction enables placement without orientation check |
| Case body | Thermal interface | Plastic housing transfers heat to PCB copper pads; requires 5.0 mm × 5.0 mm pad per terminal per datasheet layout recommendation |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional architecture | Eliminates polarity-sensitive layout; supports AC-coupled lines and differential buses without directional constraints |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift |
| MSL Level 1 rating | Enables standard reflow soldering at 260 °C peak without moisture-related delamination risk |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed directly at connector entry point to shunt surge energy before reaching sensitive ICs. Use Value: 19.9 V clamping voltage ensures microcontroller GPIOs and transceiver inputs remain below absolute maximum ratings during 500 W surges. | Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage protection element across input terminals, coordinated with upstream fusing. Use Value: 500 W peak pulse rating handles repetitive 10/1000 µs surges common in factory automation environments. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Input-stage protection for USB-C PD adapters and AC/DC converters exposed to mains-borne surges. IC Role / Device Role / Timing Role: First-line defense against differential-mode transients entering via primary-side rectifier or secondary-side output rails. Use Value: 12 V VWM aligns with 12 V rail systems while maintaining margin to 13.3 V VBR for reliable standoff. | Use Scenario: Secondary-side protection on Ethernet PHY interfaces and DSL line drivers subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional clamping device placed between transformer secondary and PHY IC to limit common-mode and differential transients. Use Value: Symmetrical response ensures equal protection for both signal polarities in full-duplex communication links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J12AHE3/5A | Same electrical specs and AEC-Q101 qualification; differs only in packaging suffix (HE3 denotes AEC-Q101 grade, same as SMA5J12CHE3/5A) | No functional difference; identical use cases and board-level implementation | Select SMA5J12CHE3/5A when ordering from standard Vishay distribution channels with confirmed HE3 traceability |
| SMCJ12CA | Higher 1500 W PPPM rating, larger DO-214AB (SMC) package, same 12 V VWM and bi-directional operation | Better suited for higher-energy threats (e.g., ISO 16750-2 long-duration surges); requires larger PCB footprint | Choose SMCJ12CA where system-level surge testing exceeds 500 W requirements or where thermal mass improves reliability |
Compared with SMA5J12AHE3/5A, SMA5J12CHE3/5A offers identical performance and qualification; versus SMCJ12CA, it trades lower surge capacity for space-constrained designs where 500 W compliance suffices and DO-214AC footprint is mandatory.
Availability
SMA5J12CHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMA5J12CHE3/5A 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and rapid response time are critical.
FAQ
What is the polarity configuration of SMA5J12CHE3/5A?
SMA5J12CHE3/5A is a bi-directional transient voltage suppressor, meaning it conducts identically in both forward and reverse directions. Unlike uni-directional variants, it has no cathode band marking and is intended for AC-coupled or polarity-agnostic protection circuits. This configuration eliminates orientation errors during automated placement and supports differential signal line protection without polarity constraints. The SMA5J12CHE3/5A datasheet confirms symmetrical electrical characteristics apply in both directions.
Is SMA5J12CHE3/5A qualified for automotive applications?
Yes, SMA5J12CHE3/5A is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronic control units. The device is specified for operation from -55 °C to +150 °C junction temperature, making it suitable for under-hood and cabin-mounted systems. SMA5J12CHE3/5A meets these requirements per Vishay Document Number 88875.
What is the clamping voltage of SMA5J12CHE3/5A at its rated peak pulse current?
The clamping voltage (VC) of SMA5J12CHE3/5A is 19.9 V at its peak pulse current (IPPM) of 25.1 A, measured using the standard 10/1000 µs double-exponential surge waveform. This value represents the maximum voltage that will appear across the device during a full-rated surge event, ensuring downstream components remain within safe operating limits. The SMA5J12CHE3/5A achieves this with low incremental surge resistance, minimizing overshoot beyond VC.
Does SMA5J12CHE3/5A require special PCB layout considerations?
Yes, SMA5J12CHE3/5A requires minimum 5.0 mm × 5.0 mm copper pads per terminal to meet its rated 500 W peak pulse power dissipation, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation capability and may cause premature failure under repeated surges. The DO-214AC (SMA) package also demands adherence to J-STD-020 MSL Level 1 reflow profile, with peak temperature not exceeding 260 °C. SMA5J12CHE3/5A layout guidelines are detailed in Document Number 88875, Figure 4.
How does the HE3 suffix differ from E3 in Vishay TVS part numbers?
The HE3 suffix in SMA5J12CHE3/5A denotes RoHS-compliant construction with AEC-Q101 qualification, whereas E3 indicates RoHS compliance only for commercial-grade devices. HE3 parts undergo additional reliability testing including high-temperature operating life, unbiased high-humidity storage, and accelerated ESD validation. Both share identical electrical parameters and DO-214AC packaging, but SMA5J12CHE3/5A is designated for automotive and mission-critical industrial use where certified qualification is mandatory.
SMA5J12CHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 22.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J12CHE3/5A FAQ
1.How can I place an order for SMA5J12CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J12CHE3/5A 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 SMA5J12CHE3/5A reliable?
The price and inventory of SMA5J12CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J12CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J12CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J12CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J12CHE3/5A?
SMA5J12CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J12CHE3/5A 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 SMA5J12CHE3/5A?
For technical support, including SMA5J12CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J12CHE3/5A requirements.
6.How does Aetrix verify that SMA5J12CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J12CHE3/5A 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 SMA5J12CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J12CHE3/5A?
All SMA5J12CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J12CHE3/5A, 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 SMA5J12CHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J12CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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