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Vishay General Semiconductor - Diodes Division SMBJ26D-M3/I
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- Part No.:
- SMBJ26D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26D-M3/I.pdf
- Description:
- TVS DIODE 26VWM 41.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,014
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Product details
Overview
SMBJ26D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 26 V stand-off voltage (VWM), 29.3–31.5 V breakdown voltage (VBR) at 1.0 mA, 41.6 V maximum clamping voltage (VC) at 14.5 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 μs waveform.
For engineers reviewing the SMBJ26D-M3/I datasheet, SMBJ26D-M3/I pinout, SMBJ26D-M3/I application, or SMBJ26D-M3/I equivalent, this device is selected for robust overvoltage protection in DC power rails, I/O interfaces, and sensor signal lines where tight VBR tolerance (±3.5 %), low leakage (<0.5 μA at VWM), and MSL Level 1 reflow compatibility are critical.
Technical Context
The SMBJ26D-M3/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range. Its clamping behavior is defined under standardized 10/1000 μs surge conditions, with thermal resistance of 125 °C/W (junction-to-ambient, mounted on minimum pad layout) and 20 °C/W (junction-to-mount).
It complies with ANSI/IEEE C62.35 surge standards and meets UL 497B recognition (QVGQ2) for protector classification. The M3 suffix confirms halogen-free, RoHS-compliant construction, matte tin-plated leads, JESD 201 Class 2 whisker resistance, and industrial-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant conduction begins |
| VBR @ IT = 1.0 mA | 29.3–31.5 V - Tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM = 14.5 A | 41.6 V - Clamped voltage during 600 W surge limits stress on downstream ICs and MOSFETs |
| ID @ VWM | <0.5 μA - Ultra-low leakage preserves battery life and signal integrity in high-impedance circuits |
| PPPM | 600 W - Peak pulse power handling capability per 10/1000 μs waveform, 0.01 % duty cycle |
| TJ max | 150 °C - Maximum junction temperature supports operation in industrial ambient environments |
| RθJA | 125 °C/W - Thermal resistance defines required PCB copper area for sustained power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, single cathode-banded end indicating polarity. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended mounting pad layout per Vishay spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration |
| Cathode (banded end) | Reverse-biased surge conduction terminal | Connected to protected line (e.g., +24 V rail or signal input); conducts transient energy to ground when VWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking |
| 600 W peak pulse power (10/1000 μs) | Handles common industrial surge events (IEC 61000-4-5 Level 3/4) without degradation |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special handling |
| <0.5 μA reverse leakage at VWM | Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks |
| Halogen-free, RoHS-compliant (M3) | Fulfills environmental compliance requirements for industrial and telecom equipment shipments globally |
Applications
| Industrial Motor Control Inputs | Automotive Body Control Module (BCM) Power Rails |
|---|---|
Use Scenario: Protection of 24 V DC inputs to PLC digital I/O modules against relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and chassis ground to clamp transients before they reach input conditioning circuitry. Use Value: Limits clamped voltage to 41.6 V, ensuring downstream optocouplers and microcontroller GPIOs remain within absolute maximum ratings during 600 W surges. | Use Scenario: Overvoltage suppression on fused 12 V supply lines feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary front-end TVS on main power entry, absorbing load-dump spikes and jump-start transients. Use Value: Withstands 14.5 A peak surge current while maintaining clamping below 42 V, preventing brownout or latch-up in 5 V/3.3 V LDOs and MCU cores. |
| Telecom Base Station Sensor Interfaces | Consumer Appliance Display Backlight Drivers |
Use Scenario: Surge protection for RS-485/RS-232 signal lines connected to environmental sensors in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional-capable family variant used in unidirectional configuration to guard differential pairs referenced to local ground. Use Value: Low 0.5 μA leakage prevents signal offset drift in precision analog sensor front-ends, while fast response time limits transient propagation delay. | Use Scenario: Protection of constant-current LED driver outputs against open-circuit transients generated by hot-plug connector insertion. IC Role / Device Role / Timing Role: TVS placed across driver output terminals to shunt inductive kickback from cable capacitance and contact bounce. Use Value: 41.6 V clamping voltage prevents breakdown of 45 V-rated driver FETs, extending reliability in high-volume white-goods production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A-M3/I | Same VWM (26 V), but tighter VBR min/max (29.3–30.7 V vs. 29.3–31.5 V); 0.5 μA ID limit applies at 25 °C only | Preferred where tighter VBR distribution is required for coordinated multi-stage protection | Select SMBJ26A-M3/I if design requires <±2.5 % VBR tolerance; otherwise SMBJ26D-M3/I offers broader process margin |
| SMCJ26A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR range, higher IPPM (35.2 A) | Suitable for higher-energy surge environments (e.g., outdoor AC/DC power supplies) where board space allows larger footprint | Choose SMCJ26A only if 600 W is insufficient and PCB layout accommodates 7.11 mm × 6.22 mm body size |
Compared with SMBJ26A-M3/I and SMCJ26A, the SMBJ26D-M3/I balances proven 600 W surge capability, compact SMB footprint, and industrial-grade M3 qualification-making it optimal for space-constrained 24 V embedded systems requiring reliable, cost-effective TVS protection without over-engineering.
Availability
SMBJ26D-M3/I is available at Aetrix Electronics and suitable for industrial motor control inputs, automotive BCM power rails, and telecom sensor interfaces requiring stable component supply, long-term lifecycle support, and consistent M3-specification compliance.
Supply support for SMBJ26D-M3/I 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, efficiency, and application-specific optimization.
The SMBJ series was developed for surface-mount transient suppression in high-volume industrial, automotive, and telecom systems where consistent clamping performance, low leakage, and reflow-ready packaging are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ26D-M3/I at its rated peak pulse current?
The SMBJ26D-M3/I has a maximum clamping voltage (VC) of 41.6 V at its rated peak pulse current (IPPM) of 14.5 A, measured under the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage limits during transient events. The SMBJ26D-M3/I datasheet specifies this parameter in Table 1 under ELECTRICAL CHARACTERISTICS.
Is SMBJ26D-M3/I suitable for bidirectional transient protection?
No, SMBJ26D-M3/I is a unidirectional TVS diode, indicated by the absence of the "C" suffix (e.g., SMBJ26CD). It conducts only in reverse bias above VBR and must be installed with the cathode band toward the protected line. For bidirectional protection, the SMBJ26CD-M3/I variant is required. The SMBJ26D-M3/I datasheet explicitly states polarity as unidirectional in the PRIMARY CHARACTERISTICS section.
What does the "M3" suffix mean in SMBJ26D-M3/I?
The "M3" suffix in SMBJ26D-M3/I denotes Vishay's industrial-grade qualification: halogen-free molding compound, RoHS compliance, matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability, and JESD 201 Class 2 whisker resistance. It also indicates tape-and-reel packaging (3200 units per 13″ reel). This suffix is defined in the MECHANICAL DATA section of the SMBJ26D-M3/I datasheet.
What is the thermal resistance of SMBJ26D-M3/I when mounted on the minimum recommended pad layout?
The SMBJ26D-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended PCB pad layout, as specified in the THERMAL CHARACTERISTICS table. This value governs steady-state power derating and must be used to calculate allowable continuous power dissipation at elevated ambient temperatures. The SMBJ26D-M3/I datasheet provides the full derating curve in Figure 5.
Does SMBJ26D-M3/I meet UL safety certification requirements?
Yes, SMBJ26D-M3/I is Underwriters Laboratory (UL) recognized under standard UL 497B for protector classification (file number E136766), covering both unidirectional and bidirectional variants in the SMBJ family. This certification applies to surge protection applications in telecommunications and industrial equipment. The SMBJ26D-M3/I documentation confirms UL recognition in the Notes section of page 2.
SMBJ26D-M3/I 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 29.3V
- Voltage - Clamping (Max) @ Ipp:
- 41.6V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
SMBJ26D-M3/I FAQ
1.How can I place an order for SMBJ26D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26D-M3/I 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 SMBJ26D-M3/I reliable?
The price and inventory of SMBJ26D-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ26D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26D-M3/I?
SMBJ26D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26D-M3/I 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 SMBJ26D-M3/I?
For technical support, including SMBJ26D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26D-M3/I requirements.
6.How does Aetrix verify that SMBJ26D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26D-M3/I 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 SMBJ26D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ26D-M3/I?
All SMBJ26D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26D-M3/I, 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 SMBJ26D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ26D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26D-M3/I Tags
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