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Vishay General Semiconductor - Diodes Division SMBG26CAHE3/52
- Part No.:
- SMBG26CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG26CAHE3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,661
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Product details
Overview
SMBG26CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 26 V stand-off voltage (VWM), 28.9–31.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), clamping voltage of 42.1 V at 14.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG26CAHE3/52 datasheet, SMBG26CAHE3/52 pinout, SMBG26CAHE3/52 application, or SMBG26CAHE3/52 equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.42), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional symmetry enables protection of AC-coupled or differential signal lines without polarity concerns, and its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) across -55 °C to +150 °C operating range.
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and exhibits low incremental surge resistance - critical for minimizing voltage overshoot during high-current transients. Thermal resistance (RθJA = 100 °C/W) reflects performance on minimum recommended PCB pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during full-rated 600 W transient; determines protected circuit's maximum stress level |
| PPPM | 600 W - Peak pulse power handling per 10/1000 μs waveform; validates suitability for ISO 7637-2 Pulse 1/2a/5a automotive transients |
| IPPM | 14.3 A - Corresponding peak pulse current at VC; used to size series impedance and verify PCB trace current capacity |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction when VAC exceeds ±VBR |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical PN junction; functionally identical to Anode in CA-series devices; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded sensor outputs without polarity constraints |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line) and ISO 7637-2 Pulse 5a (75 V/300 ms) with appropriate series impedance |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules where field failure risk must be minimized |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without baking or special handling; reduces manufacturing overhead |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA) and long-term parameter stability under thermal cycling and humidity exposure |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point, diverting >95% of transient energy to ground before reaching downstream regulators and microcontrollers. Use Value: Limits voltage seen by protected ICs to ≤42.1 V, preventing latch-up or oxide breakdown in 3.3 V/5 V logic and analog front-ends. | Use Scenario: Safeguarding 4–20 mA current loop transmitters and analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair (e.g., IN+/IN−) to clamp common-mode and differential transients from motor drives or relay switching. Use Value: Maintains signal integrity by clamping fast-rising EFT bursts (IEC 61000-4-4) while adding <1 pF capacitance - negligible impact on loop bandwidth. |
| Automotive CAN Bus Protection | Consumer USB Port ESD Protection |
Use Scenario: Hardening high-speed CAN FD physical layer (CANH/CANL) against ESD (±25 kV contact) and coupled noise in vehicle infotainment gateways. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed differentially across CANH–CANL, with minimal loading on 120 Ω termination. Use Value: Clamps ESD events to <42.1 V within <1 ns, preserving CAN bit timing and preventing bus lockup without degrading signal rise/fall times. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines (D+/D−) in portable medical monitors and smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional TVS mounted adjacent to USB connector, providing fail-safe clamping independent of host controller state. Use Value: Survives repeated ±15 kV air discharge events per IEC 61000-4-2 while maintaining <0.5 pF inter-pin capacitance - avoids USB signal integrity degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Same VWM (26 V), lower PPPM (600 W same), but higher VC (45.4 V at 13.2 A); not AEC-Q101 qualified | Limited to industrial/commercial use; unsuitable for automotive under-hood deployment due to missing qualification | Select SMBG26CAHE3/52 when AEC-Q101 compliance and tighter VC are required for automotive safety-critical nodes. |
| SMCJ26CA | Same VWM and VBR, but larger SMC (DO-214AB) package; higher IFSM (200 A vs. N/A for bidirectional), same PPPM | Requires larger PCB area; better suited for high-energy transients where thermal mass matters more than footprint | Choose SMBG26CAHE3/52 for space-constrained automotive modules; choose SMCJ26CA only if board layout allows larger footprint and higher surge repetition is needed. |
Compared with SMBJ26CA and SMCJ26CA, SMBG26CAHE3/52 uniquely combines AEC-Q101 qualification, SMBG's compact DO-215AA footprint, and the lowest clamping voltage (42.1 V) in its VWM class - making it optimal for protecting modern 3.3 V/5 V automotive electronics where voltage margin is tight.
Availability
SMBG26CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and consumer USB port protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBG26CAHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in space-constrained automotive and industrial environments, balancing low clamping, small footprint, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMBG26CAHE3/52 and how is it measured?
The SMBG26CAHE3/52 has a maximum clamping voltage (VC) of 42.1 V, measured at a peak pulse current (IPPM) of 14.3 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88456, Rev. 09-Jan-2024) and reflects worst-case device behavior under full-rated surge conditions - critical for validating voltage margins in protected circuits.
Is SMBG26CAHE3/52 suitable for automotive applications?
Yes, SMBG26CAHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its construction - glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature - meets stringent automotive reliability requirements. The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified industrial grade, confirming its suitability for ECU, ADAS, and body electronics.
Does SMBG26CAHE3/52 have polarity markings on the package?
No, SMBG26CAHE3/52 does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. As confirmed in the Vishay datasheet, bidirectional types (suffix "CA") have symmetrical electrical characteristics in both directions and are unmarked - unlike unidirectional variants which use a band to denote the cathode end.
What is the thermal resistance of SMBG26CAHE3/52 and how does it affect layout?
The SMBG26CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, potentially limiting surge repetition rate. For high-duty-cycle applications, designers should verify thermal performance using actual board stack-up and airflow conditions.
How does SMBG26CAHE3/52 differ from unidirectional SMBG26AHE3/52?
SMBG26CAHE3/52 is bidirectional with symmetrical breakdown in both polarities (VBR = 28.9–31.9 V), while SMBG26AHE3/52 is unidirectional with anode/cathode asymmetry and includes a cathode band. The "CA" version supports AC signal protection (e.g., CAN, RS-485) without polarity concerns; the "A" version is intended for DC rail protection where polarity is fixed. Their VWM, PPPM, and package are identical, but electrical behavior and marking differ fundamentally.
SMBG26CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG26CAHE3/52 FAQ
1.How can I place an order for SMBG26CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG26CAHE3/52 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 SMBG26CAHE3/52 reliable?
The price and inventory of SMBG26CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG26CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG26CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG26CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG26CAHE3/52?
SMBG26CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG26CAHE3/52 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 SMBG26CAHE3/52?
For technical support, including SMBG26CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG26CAHE3/52 requirements.
6.How does Aetrix verify that SMBG26CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG26CAHE3/52 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 SMBG26CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG26CAHE3/52?
All SMBG26CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG26CAHE3/52, 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 SMBG26CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG26CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG26CAHE3/52 Tags
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