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Vishay General Semiconductor - Diodes Division SMBJ26CA-E3/52
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- Part No.:
- SMBJ26CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CA-E3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,722
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Product details
Overview
SMBJ26CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 42.1 V maximum clamping voltage (VC) at 14.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ26CA-E3/52 datasheet, SMBJ26CA-E3/52 pinout, SMBJ26CA-E3/52 application, or SMBJ26CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.42), JEDEC-compliant SMB package footprint, and AEC-Q101 qualification availability (via HE3 suffix variants).
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 26 V), then rapidly avalanches into low-impedance conduction when transient voltage exceeds VBR. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Thermal design relies on its RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and TJ(max) = 150 °C, supporting repetitive surge duty cycles up to 0.01 % at 600 W. The glass-passivated junction ensures stable VBR temperature coefficient (0.097 %/°C) and long-term reliability under repeated surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients above 26 V |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage seen by protected circuit during full 600 W surge; limits stress on downstream components |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; validates robustness against lightning-induced or inductive-switching surges |
| IPPM | 14.3 A - Peak surge current capacity at rated clamping voltage; determines minimum trace width and PCB pad thermal mass required |
| TJ(max) | +150 °C - Maximum junction temperature enabling operation in high-ambient environments like motor drives or telecom power modules |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated SMT assembly |
Pinout & Package
Package: SMB (DO-214AA), bidirectional device with no polarity marking; symmetrical terminals accept voltage transients in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient shunt path | Both terminals function identically; connected across protected line and return to divert surge energy to ground or rail |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge immunity for IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-ground) compliance in industrial equipment |
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with higher-voltage domains |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free soldering processes without preconditioning; eliminates moisture sensitivity handling requirements |
| AEC-Q101 qualified option (HE3 suffix) | Validated for automotive powertrain and body electronics where TVS reliability under thermal cycling and vibration is mission-critical |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers from inductive kickback during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage spikes to <42.1 V during 14.3 A transients, preserving gate oxide integrity and analog accuracy. Use Value: Prevents cumulative degradation of power stage components under repeated 600 W surges, extending system MTBF beyond 10 years. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping absorbs both positive and negative voltage excursions on 12 V vehicle networks. Use Value: Eliminates need for separate unidirectional TVS pairs, reducing BOM count and PCB area in space-constrained BCM housings. |
| Telecom Power Supply Inputs | Consumer Sensor Interface Boards |
Use Scenario: Input-stage protection of 48 V DC-DC converters against lightning-induced surges on PoE or remote power feeds. IC Role / Device Role / Timing Role: First-line defense clamping transients before primary-side FETs and controller ICs. Use Value: Maintains converter uptime during outdoor deployment where >1 kV surge events occur at <0.1 % annual probability. |
Use Scenario: ESD and EFT hardening of I²C/SPI lines connecting MEMS accelerometers or environmental sensors to host MCUs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp preserving signal integrity up to 1 MHz. Use Value: Passes IEC 61000-4-2 Level 4 (8 kV contact, 15 kV air) without signal distortion or false triggering in wearable devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in circuit performance; selected only when halogen-free material compliance is mandated by OEM sustainability policy | Choose M3/52 for green manufacturing programs requiring halogen-free bill-of-materials documentation |
| SAC26CA-13-F | Same VWM/VC ratings but in smaller SOD-123 package (lower PPPM = 400 W); 30 % smaller footprint | Lower surge margin - suitable only for non-lightning environments (e.g., board-level ESD only), not for mains-connected equipment | Select SAC26CA-13-F only when space is critical and surge threat level is limited to IEC 61000-4-2, not IEC 61000-4-5 |
Compared with SMBJ26CA-E3/52, the M3/52 offers identical protection performance with halogen-free construction, while SAC26CA-13-F trades 33 % lower peak power for 30 % smaller size - making the original SMBJ26CA-E3/52 optimal for industrial-grade surge immunity where PCB real estate permits standard SMB placement.
Availability
SMBJ26CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply and verified surge immunity.
Supply support for SMBJ26CA-E3/52 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, and protection devices with emphasis on reliability and application-specific validation.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure power systems where failure is not an option.
FAQ
What is the clamping voltage of SMBJ26CA-E3/52 at its rated peak pulse current?
The SMBJ26CA-E3/52 has a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value ensures protected circuits experience no more than 42.1 V during worst-case transients, directly supporting 3.3 V and 5 V IC survival margins. The SMBJ26CA-E3/52 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ26CA-E3/52 suitable for automotive applications?
The SMBJ26CA-E3/52 itself is commercial-grade; however, Vishay offers the functionally identical SMBJ26CA-HE3 variant (AEC-Q101 qualified) in the same SMB package. For automotive body control modules or infotainment power rails requiring qualification, engineers should specify the HE3 suffix. The SMBJ26CA-E3/52 remains appropriate for non-safety-critical consumer or industrial designs where AEC-Q101 is not mandated, retaining full electrical compatibility and mechanical fit.
How does the bidirectional nature of SMBJ26CA-E3/52 affect its PCB layout?
The SMBJ26CA-E3/52 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment - either terminal may connect to line or return. This simplifies routing on dense boards and eliminates risk of assembly error. Layout must still follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal to maintain thermal derating and achieve rated 600 W pulse power. The SMBJ26CA-E3/52 benefits from symmetric trace geometry to preserve balanced surge current sharing.
What is the maximum reverse leakage current of SMBJ26CA-E3/52 at its stand-off voltage?
At its 26 V stand-off voltage (VWM) and ambient temperature of 25 °C, the SMBJ26CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents unintended biasing of sensitive analog front-ends. Leakage remains below 5 µA up to 80 % of VWM, confirming stable blocking behavior well within normal operating ranges. The SMBJ26CA-E3/52 achieves this via glass-passivated junction technology.
Can SMBJ26CA-E3/52 replace unidirectional TVS diodes in existing designs?
Yes - the SMBJ26CA-E3/52 can replace unidirectional counterparts (e.g., SMBJ26A-E3/52) in most applications, provided the circuit does not rely on forward conduction for functionality. Its bidirectional symmetry provides equal clamping in both polarities, eliminating risk of incorrect orientation during assembly. However, if the original design uses the unidirectional part's forward voltage drop (VF ≤ 3.5 V at 50 A) for intentional conduction, the SMBJ26CA-E3/52 is not a drop-in substitute. Always verify system-level polarity requirements before substitution.
SMBJ26CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 14.3A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ26CA-E3/52 FAQ
1.How can I place an order for SMBJ26CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CA-E3/52 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 SMBJ26CA-E3/52 reliable?
The price and inventory of SMBJ26CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CA-E3/52?
SMBJ26CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CA-E3/52 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 SMBJ26CA-E3/52?
For technical support, including SMBJ26CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ26CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26CA-E3/52 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 SMBJ26CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26CA-E3/52?
All SMBJ26CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CA-E3/52, 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 SMBJ26CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ26CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CA-E3/52 Tags
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