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Vishay General Semiconductor - Diodes Division SMBJ26CA-M3/5B
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- Part No.:
- SMBJ26CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CA-M3/5B.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ26CA-M3/5B 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 and 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-M3/5B datasheet, SMBJ26CA-M3/5B pinout, SMBJ26CA-M3/5B application, or SMBJ26CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the low incremental surge resistance supports effective energy diversion during ESD and lightning-induced surges.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W (on recommended pad layout) and RθJL = 20 °C/W. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes - though SMBJ26CA-M3/5B itself is commercial-grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1 mA - guaranteed breakdown range ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 42.1 V at 14.3 A - clamping voltage under 600 W 10/1000 µs surge; limits downstream voltage stress to safe levels. |
| PPPM | 600 W - peak pulse power handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| IPPM | 14.3 A - peak pulse current supported at VC; derived from PPPM/VC, critical for PCB trace sizing and layout. |
| Junction Temp | -55 °C to +150 °C - wide operating range enables use in automotive under-hood and industrial motor drive environments. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Absent) | Terminal A | Bidirectional conduction path - functions as cathode in one polarity, anode in reverse; no marking required per spec. |
| Anode (Cathode Band Absent) | Terminal B | Second terminal identical to Terminal A; symmetrical structure enables AC line or differential pair protection without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Supports robust protection against IEC 61000-4-5 surges up to 1 kV open-circuit / 0.5 kA short-circuit test levels. |
| Low clamping voltage (42.1 V) | Enables safe operation of 3.3 V/5 V/24 V logic and analog ICs downstream by limiting transient overvoltage exposure. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for industrial and consumer electronics without compromising surge performance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility with standard lead-free solder profiles (peak 260 °C). |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current under thermal cycling and humidity stress. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rails and signal inputs to clamp transients before they reach sensitive CMOS inputs. Use Value: Prevents latch-up and permanent damage in 24 V control circuits where switching events generate >100 V spikes. |
Use Scenario: ESD and load-dump suppression on LIN bus and sensor supply lines in BCMs exposed to harsh vehicle environments. IC Role / Device Role / Timing Role: Standoff-rated clamping device connected between VBAT and ground, absorbing 12 V system transients up to ISO 7637-2 Pulse 5a. Use Value: Maintains functional safety integrity by limiting voltage excursions to <45 V during 35 V/100 ms load dump events. |
| Industrial PLC I/O Modules | Consumer Smart Home Hubs |
|
Use Scenario: Input protection for analog current-loop (4–20 mA) and digital dry-contact interfaces subject to field wiring surges. IC Role / Device Role / Timing Role: First-line transient suppressor mounted directly at connector entry point, shunting surge energy to chassis ground. Use Value: Enables reliable operation in factory-floor environments with frequent electrostatic discharge and nearby motor switching noise. |
Use Scenario: Protection of USB-C, Ethernet PHY, and Zigbee radio interfaces against human-body-model (HBM) ESD and cable-induced transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on high-speed data lines, minimizing signal distortion while meeting IEC 61000-4-2 ±8 kV contact discharge. Use Value: Preserves signal integrity on 100 Mbps Ethernet links with <0.5 pF typical junction capacitance at zero bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/5B | Same electrical specs, but RoHS-compliant with brominated flame retardant (not halogen-free); base P/N-E3 suffix. | Acceptable for commercial non-automotive designs where halogen-free requirement is not mandated. | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process. |
| SAC26CA | Lower 400 W PPPM, higher VC = 45.7 V at 11.1 A; smaller SOD-123FL package (2.7 mm × 1.7 mm). | Better suited for space-constrained portable electronics; insufficient for industrial 600 W surge requirements. | Choose only for compact consumer devices with lower surge immunity needs; not drop-in due to package and power mismatch. |
Compared with SMBJ26CA-E3/5B, the SMBJ26CA-M3/5B offers halogen-free compliance without sacrificing surge rating; versus SAC26CA, it delivers 50 % higher pulse power and lower clamping voltage but requires more PCB area - making it optimal for industrial-grade reliability where footprint is secondary to robustness.
Availability
SMBJ26CA-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and PLC I/O protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ26CA-M3/5B 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, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in demanding industrial and automotive environments, balancing clamping performance, thermal robustness, and SMT manufacturability.
FAQ
What is the clamping voltage of SMBJ26CA-M3/5B at its rated peak pulse current?
The SMBJ26CA-M3/5B has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 42.1 V during a 600 W transient event. The SMBJ26CA-M3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with minimal derating required up to 125 °C.
Is SMBJ26CA-M3/5B suitable for automotive applications?
The SMBJ26CA-M3/5B is commercial-grade and not AEC-Q101 qualified; however, it shares identical electrical and mechanical specifications with AEC-Q101 variants (e.g., SMBJ26CAHM3_B/I). For non-safety-critical automotive subsystems like infotainment or lighting control, SMBJ26CA-M3/5B may be used with customer validation. For BCM or ADAS applications requiring qualification, the HM3-suffixed AEC-Q101 version must be selected. The SMBJ26CA-M3/5B itself carries no automotive qualification documentation.
How does the bidirectional design of SMBJ26CA-M3/5B affect its PCB layout?
The SMBJ26CA-M3/5B has no polarity marking and identical terminals, allowing unrestricted orientation during automated placement - reducing assembly errors and eliminating need for orientation verification. Its symmetrical structure supports direct placement across AC signal pairs (e.g., RS-485, CAN), ungrounded power rails, or floating sensor bridges without concern for anode/cathode alignment. The SMBJ26CA-M3/5B requires only two 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal and surge performance, per Vishay's recommended layout.
What is the maximum reverse leakage current of SMBJ26CA-M3/5B at its stand-off voltage?
At VWM = 26 V and TA = 25 °C, the SMBJ26CA-M3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures negligible standby power loss in battery-powered or high-impedance sensing circuits. Leakage remains below 5 µA up to 125 °C ambient, verified per the device's thermal derating curve in Figure 2 of the datasheet. The SMBJ26CA-M3/5B achieves this performance via glass-passivated junction technology, which minimizes surface conduction paths.
Can SMBJ26CA-M3/5B replace SMBJ24CA-M3/5B in an existing design?
Yes, the SMBJ26CA-M3/5B can replace SMBJ24CA-M3/5B if the system's stand-off voltage margin allows a 2 V increase (from 24 V to 26 V). Both share identical SMB package, pinout, thermal characteristics, and surge ratings. However, the higher VWM delays clamping onset, potentially exposing downstream components to longer-duration transients. Verify that the protected IC's absolute maximum rating exceeds 42.1 V (VC of SMBJ26CA-M3/5B) and that system-level surge testing passes with the new VWM. The SMBJ26CA-M3/5B is not a drop-in replacement unless the design accommodates the elevated threshold.
SMBJ26CA-M3/5B 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-M3/5B FAQ
1.How can I place an order for SMBJ26CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CA-M3/5B 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-M3/5B reliable?
The price and inventory of SMBJ26CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ26CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CA-M3/5B?
SMBJ26CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CA-M3/5B 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-M3/5B?
For technical support, including SMBJ26CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ26CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ26CA-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ26CA-M3/5B?
All SMBJ26CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CA-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ26CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CA-M3/5B Tags
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