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Vishay General Semiconductor - Diodes Division SMA5J26CA-E3/5A
- Part No.:
- SMA5J26CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J26CA-E3/5A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J26CA-E3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 26 V standoff voltage (VWM), 42.1 V clamping voltage (VC) at 11.9 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform), commonly deployed to protect automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMA5J26CA-E3/5A datasheet, SMA5J26CA-E3/5A pinout, SMA5J26CA-E3/5A application, or SMA5J26CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, low incremental surge resistance, AEC-Q101 qualification eligibility, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 28.9 V and 31.9 V at 1 mA test current. Its clamping performance is characterized under standardized 10/1000 µs surge waveforms, delivering consistent voltage limiting up to 42.1 V at rated IPPM.
Thermal design relies on junction-to-ambient thermal resistance of 80 °C/W (typical) and junction-to-lead resistance of 25 °C/W (typical), enabling reliable operation within -55 °C to +150 °C junction temperature range. The device meets MSL level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins |
| VC @ IPPM | 42.1 V - Clamped voltage during 11.9 A 10/1000 µs surge, defining protected circuit's maximum overvoltage exposure |
| PPPM | 500 W - Peak pulse power handling capacity under standard surge waveform, critical for IEC 61000-4-5 compliance margin |
| VBR min/max | 28.9 V / 31.9 V - Breakdown voltage range at 1 mA, ensuring predictable turn-on threshold in both directions |
| ID @ VWM | 1.0 µA - Reverse leakage at 26 V, minimizing standby power loss in battery-powered sensor nodes |
| TJ max | +150 °C - Maximum junction temperature, supporting under-hood automotive and industrial ambient conditions |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance, guiding PCB copper pad sizing for thermal management |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path terminal | Either end serves as input/output for transient energy diversion; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating on standard PCB layouts |
| Low clamping voltage (42.1 V @ 11.9 A) | Reduces stress on downstream 3.3 V/5 V/24 V interface ICs by limiting overvoltage excursion below system withstand thresholds |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing without baking, simplifying SMT line integration |
| AEC-Q101 qualification option | Supports automotive-grade sourcing via HE3/HM3 suffix variants, meeting stress-test requirements for engine control and ADAS modules |
| Glass passivated junction | Ensures stable VBR and low leakage over 15-year field life in humid or thermally cycled environments |
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 ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal integrity by limiting transients to ≤42.1 V, preventing latch-up or permanent damage to 5 V tolerant transceivers and ADC front-ends. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage suppression element across input terminals, coordinated with series impedance for energy absorption. Use Value: Withstands repeated 500 W surges without parameter shift, extending maintenance intervals in factory automation systems with frequent cable disconnect events. |
| Telecom Power Line Protection | Consumer USB Port ESD Suppression |
Use Scenario: Secondary protection on 48 V DC power feeds in remote radio units and base station backhaul equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamping device positioned after primary GDT or MOV, handling residual fast-rising transients. Use Value: Sub-1 ns response time ensures clamping initiates before sensitive DC-DC converters experience overvoltage stress during multi-kV transients. |
Use Scenario: Board-level ESD protection on USB 2.0 data lines (D+/D−) and VBUS in smart home hubs and portable media devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector to divert ±15 kV HBM ESD strikes. Use Value: 1.0 µA leakage at 26 V prevents signal degradation on high-impedance data lines while maintaining USB 2.0 eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J26CA-M3/5A | Halogen-free, RoHS-compliant variant with identical electrical specs and thermal characteristics | Required for halogen-free BOM compliance in EU medical and industrial equipment | Select when environmental compliance mandates halogen-free materials without altering circuit protection behavior |
| SMA5J26CAHE3_A/I | AEC-Q101 qualified version with same VWM, VC, and PPPM; validated for automotive temperature cycling and humidity testing | Approved for under-hood and chassis-mounted automotive modules requiring PPAP documentation | Choose for automotive production programs where qualification traceability and failure rate data are contractually required |
Compared with SMA5J26CA-E3/5A, the M3/5A variant adds halogen-free material compliance without electrical trade-offs, while the HE3_A/I version delivers full AEC-Q101 validation-enabling drop-in use in automotive designs but requiring qualification documentation not needed for commercial industrial applications.
Availability
SMA5J26CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power supplies, and consumer USB port protection requiring stable component supply and long-term manufacturing continuity.
Supply support for SMA5J26CA-E3/5A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT applications, targeting automotive, industrial, and telecom systems where robustness against repetitive surge events is mandatory.
FAQ
What is the clamping voltage of the SMA5J26CA-E3/5A under maximum rated surge current?
The SMA5J26CA-E3/5A exhibits a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current (IPPM) of 11.9 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J26CA-E3/5A maintains this clamping performance consistently across both polarities due to its bidirectional construction.
Is the SMA5J26CA-E3/5A suitable for automotive applications?
The SMA5J26CA-E3/5A itself is a commercial-grade part, but Vishay offers AEC-Q101 qualified versions under the HE3 and HM3 suffixes (e.g., SMA5J26CAHE3_A/I). While the SMA5J26CA-E3/5A shares identical electrical and thermal specifications, it lacks the extended reliability testing required for automotive under-hood deployment. For production automotive use, specify the HE3 or HM3 variant; the SMA5J26CA-E3/5A remains appropriate for non-automotive industrial and consumer applications.
What is the standoff voltage (VWM) and why does it matter for the SMA5J26CA-E3/5A?
The SMA5J26CA-E3/5A has a standoff voltage (VWM) of 26 V, meaning it remains in high-impedance state and draws only 1.0 µA leakage current up to this reverse voltage. This parameter ensures the SMA5J26CA-E3/5A does not interfere with normal circuit operation-critical for protecting 24 V industrial buses or automotive LIN networks where sustained voltage levels approach the clamping threshold. Exceeding VWM initiates avalanche conduction to suppress transients.
Does the SMA5J26CA-E3/5A have polarity markings, and how is it mounted?
No, the SMA5J26CA-E3/5A is a bidirectional TVS and carries no cathode band or polarity marking on its SMA (DO-214AC) package. It is mounted symmetrically across the protected line pair-either terminal may connect to either side of the circuit. The device uses matte tin-plated leads compatible with J-STD-002 soldering standards and requires 0.2" × 0.2" copper pads per terminal for optimal thermal and surge performance, as specified in the Vishay datasheet for the SMA5J26CA-E3/5A.
How does the SMA5J26CA-E3/5A compare to unidirectional TVS diodes like SMA5J26A-E3/5A?
The SMA5J26CA-E3/5A differs from the unidirectional SMA5J26A-E3/5A solely in polarity configuration: the "CA" suffix denotes bidirectional operation with symmetrical clamping in both directions, while the "A" version conducts only in reverse bias and requires correct orientation. Both share identical VWM (26 V), VC (42.1 V), PPPM (500 W), and package. Use the SMA5J26CA-E3/5A where AC-coupled signals, differential buses, or polarity-agnostic protection is needed-such as on RS-485 or Ethernet PHY lines.
SMA5J26CA-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J26CA-E3/5A FAQ
1.How can I place an order for SMA5J26CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J26CA-E3/5A 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 SMA5J26CA-E3/5A reliable?
The price and inventory of SMA5J26CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J26CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J26CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J26CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J26CA-E3/5A?
SMA5J26CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J26CA-E3/5A 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 SMA5J26CA-E3/5A?
For technical support, including SMA5J26CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J26CA-E3/5A requirements.
6.How does Aetrix verify that SMA5J26CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J26CA-E3/5A 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 SMA5J26CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J26CA-E3/5A?
All SMA5J26CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J26CA-E3/5A, 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 SMA5J26CA-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J26CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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