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Vishay General Semiconductor - Diodes Division SMBJ26CAHM3_A/I
- Part No.:
- SMBJ26CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ26CAHM3_A/I.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,968
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Product details
Overview
SMBJ26CAHM3_A/I 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 standoff 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 - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ26CAHM3_A/I datasheet, SMBJ26CAHM3_A/I pinout, SMBJ26CAHM3_A/I application, or SMBJ26CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) under standard PCB pad layout.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional structure. It responds within <1 ps to transient overvoltages and maintains stable clamping performance across -55 °C to +150 °C junction temperature range.
Designed for unclamped inductive switching events and lightning-induced surges, it delivers 14.3 A peak pulse current (IPPM) while limiting voltage to ≤42.1 V. Its glass-passivated junction ensures low leakage (<1 µA at VWM) and high reliability under repetitive surge stress (0.01% duty cycle).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress level. |
| PPPM | 600 W - Peak pulse power handling capacity with standardized 10/1000 µs waveform; validates robustness against common surge profiles. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial or automotive under-hood environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating requirements for sustained power dissipation. |
| Package | SMB (DO-214AA) - Surface-mount outline with 2.2 mm profile height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | No polarity marking on device body; terminals are functionally interchangeable for AC or differential transient suppression. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Enables clamping in both directions without external orientation constraints - simplifies PCB layout for bidirectional signal lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Provides symmetrical overvoltage protection on AC-coupled or floating signal paths without polarity sensitivity. |
| 600 W peak pulse power | Handles high-energy transients such as IEC 61000-4-5 surge events up to 4 kV (line-to-earth) with appropriate impedance matching. |
| AEC-Q101 qualified | Validated for automotive electronics use including infotainment, body control modules, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial and consumer equipment sold in EU, China, and North America. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive ICs. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs from ESD and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or supply rail to clamp transients before they reach interface ICs. Use Value: Prevents latch-up or permanent damage to transceivers operating at ±12 V common-mode range while maintaining signal integrity up to 10 Mbps. |
Use Scenario: Shielding Ethernet PHY ports and DSL line drivers from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary front-end clamping device on twisted-pair inputs, coordinated with gas discharge tubes for staged protection. Use Value: Limits induced surge voltage to <45 V during 10/1000 µs events, preserving PHY functionality and meeting GR-1089-CORE Level 3 immunity requirements. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Safeguarding LIN bus nodes and window lift motor drivers against load dump and alternator ripple in 12 V vehicle networks. IC Role / Device Role / Timing Role: Bidirectional suppressor mounted at connector entry point to absorb coupled transients before reaching microcontroller GPIO or driver ICs. Use Value: Withstands 100 A surge current per AEC-Q101 test conditions and maintains clamping below 45 V, preventing MCU reset or gate driver malfunction. |
Use Scenario: Protecting BLDC motor controller FET gates and Hall-effect position sensors from commutation spikes in washing machines and HVAC fans. IC Role / Device Role / Timing Role: Localized TVS on low-voltage sensor rails and gate drive feedback paths to suppress sub-100 ns ringing. Use Value: Fast response (<1 ps) and low clamping voltage ensure sensor accuracy remains unaffected during repeated motor startup/shutdown cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CAHE3_A/I | Same electrical specs and SMB package, but RoHS-compliant without halogen-free certification; not AEC-Q101 qualified. | Suitable for commercial-grade industrial or consumer products where automotive qualification is unnecessary. | Select when halogen-free requirement is waived and cost optimization is prioritized over automotive compliance. |
| SMAJ26CAHM3_A/I | Lower 400 W peak pulse power rating; same VWM/VBR/VC but reduced IPPM (11.3 A); SMA (DO-214AC) package with smaller footprint and higher RθJA. | Better suited for space-constrained designs with lower surge exposure, e.g., portable electronics or secondary-stage protection. | Choose only if board area is critical and surge threat level is limited to IEC 61000-4-2 ESD or low-energy switching noise. |
Compared with SMBJ26CAHM3_A/I, SMBJ26CAHE3_A/I offers identical protection performance without halogen-free assurance or automotive qualification, while SMAJ26CAHM3_A/I trades 33% lower surge capacity and higher thermal resistance for 30% smaller PCB area - requiring careful system-level surge budget analysis before substitution.
Availability
SMBJ26CAHM3_A/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply with halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMBJ26CAHM3_A/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 validation.
The SMBJ series targets high-reliability transient suppression in harsh environments, combining high-power surge handling with automotive-grade qualification and environmentally compliant packaging.
FAQ
What is the clamping voltage of SMBJ26CAHM3_A/I at its rated peak pulse current?
The SMBJ26CAHM3_A/I has a maximum clamping voltage (VC) of 42.1 V at 14.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ26CAHM3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ26CAHM3_A/I suitable for automotive applications?
Yes, SMBJ26CAHM3_A/I is AEC-Q101 qualified and specifically intended for automotive use cases including body control modules, infotainment interfaces, and sensor protection in 12 V systems. Its halogen-free, RoHS-compliant construction and validated surge performance under temperature cycling, humidity, and mechanical shock meet automotive reliability standards. The SMBJ26CAHM3_A/I is marked with HM3 suffix to denote this qualification.
How does the bidirectional design of SMBJ26CAHM3_A/I affect PCB layout?
The SMBJ26CAHM3_A/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This allows direct integration across differential signal pairs (e.g., RS-485, CAN), AC-coupled lines, or floating power rails without concern for anode/cathode alignment. The SMBJ26CAHM3_A/I simplifies layout, reduces BOM variants, and avoids misassembly risk compared to unidirectional TVS diodes.
What is the thermal resistance of SMBJ26CAHM3_A/I, and how does it impact power derating?
The SMBJ26CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation must be linearly derated - for example, to ~3.5 W at 75 °C ambient. This derating ensures junction temperature stays within the +150 °C maximum limit during continuous operation or repetitive surges.
Does SMBJ26CAHM3_A/I meet any safety certifications for surge protection?
Yes, SMBJ26CAHM3_A/I carries Underwriters Laboratories (UL) recognition under file E136766 for both unidirectional and bidirectional transient protectors per UL 497B, covering applications in telecommunications and industrial equipment. This certification confirms compliance with insulation, flammability (UL 94 V-0), and surge withstand requirements for primary-side protection circuits using the SMBJ26CAHM3_A/I.
SMBJ26CAHM3_A/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:
- Obsolete
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ26CAHM3_A/I FAQ
1.How can I place an order for SMBJ26CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ26CAHM3_A/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 SMBJ26CAHM3_A/I reliable?
The price and inventory of SMBJ26CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ26CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ26CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ26CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ26CAHM3_A/I?
SMBJ26CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ26CAHM3_A/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 SMBJ26CAHM3_A/I?
For technical support, including SMBJ26CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ26CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ26CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ26CAHM3_A/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 SMBJ26CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ26CAHM3_A/I?
All SMBJ26CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ26CAHM3_A/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 SMBJ26CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ26CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ26CAHM3_A/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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