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Vishay General Semiconductor - Diodes Division SMBJ26CAHE3/52
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- Part No.:
- SMBJ26CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHE3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,044
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Product details
Overview
SMBJ26CAHE3/52 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 power and signal 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 (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ26CAHE3/52 datasheet, SMBJ26CAHE3/52 pinout, SMBJ26CAHE3/52 application, or SMBJ26CAHE3/52 equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical electrical characteristics forward and reverse - critical for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable VBR over temperature, with ±0.097 %/°C temperature coefficient and low incremental surge resistance enabling fast response to ESD and lightning-induced surges.
The device is rated for repetitive 600 W pulses (10/1000 µs, 0.01 % duty cycle) and withstands 100 A non-repetitive forward surge (8.3 ms half-sine), while maintaining operation across -55 °C to +150 °C junction temperature range. Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V rail protection. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - guaranteed breakdown threshold ensuring predictable turn-on during transients. |
| VC @ IPPM | 42.1 V at 14.3 A - clamped voltage under full-rated surge, limiting downstream IC stress to safe levels. |
| PPPM | 600 W - peak transient energy absorption capacity with 10/1000 µs waveform, suitable for IEC 61000-4-5 Level 4 compliance. |
| ID @ VWM | 1.0 µA - ultra-low leakage at stand-off voltage, minimizing standby power loss in battery-powered systems. |
| TJ max. | +150 °C - extended junction temperature rating enables use in under-hood automotive environments. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard PCB pad layout; informs derating above 25 °C. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Connects to protected line; conducts during negative-going transients and positive surges relative to reference. |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Identical role to Terminal 1; no functional distinction - device behaves identically in either orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| 600 W peak pulse power | Supports robust protection against IEC 61000-4-5 surge events without degradation under repeated exposure. |
| Low-profile SMB package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment for automated manufacturing. |
| Glass passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh environments. |
| MSL Level 1 | Allows unlimited floor life and single reflow up to 260 °C peak, eliminating bake requirements prior to assembly. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs from load-dump and jump-start induced transients in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between bus line and ground, absorbing energy without affecting signal integrity. Use Value: Maintains <1.0 µA leakage at 26 V VWM to avoid biasing errors in high-impedance receiver inputs while clamping to 42.1 V. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer transceivers in factory automation PLCs exposed to motor switching noise. IC Role / Device Role / Timing Role: Line-to-ground transient suppressor on differential bus pairs, symmetrically limiting voltage excursions on both A and B lines. Use Value: Delivers matched clamping in both directions (VBR min/max = 28.9/31.9 V) to preserve common-mode rejection and prevent data corruption. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
|
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters after DC-DC conversion stages. IC Role / Device Role / Timing Role: Standoff-clamp protector on regulated 20–24 V output rails, triggered only during fault conditions. Use Value: 26 V VWM provides 2 V margin above nominal 24 V output, while 42.1 V VC prevents MOSFET gate oxide damage during surge events. |
Use Scenario: Primary protection of -48 V telecom power feeds against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Bidirectional shunt device connected between -48 V rail and chassis ground, conducting during positive or negative transients. Use Value: Withstands 100 A 8.3 ms surge (IFSM) and maintains RθJA = 100 °C/W on standard pads, enabling reliable operation without heatsinking. |
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; identical electrical specs and AEC-Q101 qualification. | No difference in circuit behavior or reliability; selected where halogen-free material compliance is mandated. | Choose SMBJ26CA-M3/52 when halogen-free bill-of-materials is required; otherwise SMBJ26CAHE3/52 is preferred for general automotive use. |
| SMCJ26CAHE3/52 | Larger SMC (DO-214AB) package; same VWM/VBR/VC but higher 1500 W PPPM rating and lower RθJA (50 °C/W). | Better thermal performance and surge handling, but requires larger PCB footprint and may not fit space-constrained designs. | Select SMBJ26CAHE3/52 when board area is limited and 600 W surge rating suffices; choose SMCJ26CAHE3/52 for higher-energy threat environments. |
Compared with SMBJ26CA-M3/52, SMBJ26CAHE3/52 offers identical protection performance with standard RoHS compliance; versus SMCJ26CAHE3/52, it trades 2.5× surge power headroom for 40 % smaller footprint and compatible placement on dense automotive PCBs.
Availability
SMBJ26CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom power feed hardening requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ26CAHE3/52 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, automotive qualification, and high-volume manufacturability.
The SMBJ series targets cost-sensitive yet mission-critical transient suppression in automotive, industrial, and telecom infrastructure - optimized for automated assembly and long-term field stability under thermal and electrical stress.
FAQ
What does the "CA" suffix indicate in SMBJ26CAHE3/52?
The "CA" suffix denotes a bidirectional configuration: SMBJ26CAHE3/52 provides symmetrical clamping in both polarities, making it suitable for AC signal lines, differential buses like CAN, or floating power rails where polarity reversal may occur. Unlike unidirectional "A" variants, SMBJ26CAHE3/52 has no cathode marking and identical VBR/VWM specifications in forward and reverse directions.
Is SMBJ26CAHE3/52 qualified for automotive applications?
Yes, SMBJ26CAHE3/52 is AEC-Q101 qualified - verified per stress test requirements for automotive-grade reliability, including temperature cycling, humidity bias HAST, and surge endurance. The "HE3" suffix explicitly indicates RoHS-compliant and AEC-Q101 qualified construction, supporting use in engine control units, ADAS sensors, and body electronics.
What is the maximum clamping voltage of SMBJ26CAHE3/52 under surge conditions?
The maximum clamping voltage (VC) of SMBJ26CAHE3/52 is 42.1 V at 14.3 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a full-rated 600 W transient event, ensuring protected ICs remain within absolute maximum ratings.
How does SMBJ26CAHE3/52 differ from SMBJ26AHE3/52?
SMBJ26CAHE3/52 is bidirectional with symmetrical clamping, while SMBJ26AHE3/52 is unidirectional - featuring a cathode band and conducting only in reverse bias. The "CA" version supports AC or polarity-agnostic protection; the "A" version is used on DC rails where directionality is fixed. Electrical parameters (VWM, VBR, VC) differ slightly due to test condition alignment.
What PCB pad layout is recommended for optimal thermal performance of SMBJ26CAHE3/52?
Vishay specifies mounting SMBJ26CAHE3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated RθJA of 100 °C/W. Reducing pad size increases thermal resistance and requires derating of peak pulse power above 25 °C ambient; the device's MSL Level 1 rating permits standard lead-free reflow without pre-baking.
SMBJ26CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ26CAHE3/52 FAQ
1.How can I place an order for SMBJ26CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHE3/52 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 SMBJ26CAHE3/52 reliable?
The price and inventory of SMBJ26CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHE3/52?
SMBJ26CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHE3/52 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 SMBJ26CAHE3/52?
For technical support, including SMBJ26CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ26CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHE3/52 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 SMBJ26CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHE3/52?
All SMBJ26CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHE3/52, 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 SMBJ26CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ26CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHE3/52 Tags
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