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Vishay General Semiconductor - Diodes Division SMBG26CA-E3/52
- Part No.:
- SMBG26CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG26CA-E3/52.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,663
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Product details
Overview
SMBG26CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal and power lines. It features 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), 14.3 A peak pulse current (IPPM), and 42.1 V maximum clamping voltage (VC) - deployed in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the SMBG26CA-E3/52 datasheet, SMBG26CA-E3/52 pinout, SMBG26CA-E3/52 application, or SMBG26CA-E3/52 equivalent, key selection criteria include bidirectional surge capability, AEC-Q101 qualification, 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 device operates as a voltage-clamped crowbar during ESD or lightning-induced surges, leveraging an avalanche breakdown mechanism across both polarities. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at 26 V), while the low incremental surge resistance enables rapid energy dissipation without thermal runaway.
The SMBG26CA-E3/52 is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and complies with JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 28.9 V / 31.9 V at 1 mA - Confirmed avalanche threshold range; ensures reliable triggering under transient overvoltage conditions. |
| VC @ IPPM | 42.1 V at 14.3 A - Clamped voltage during 600 W surge; limits downstream IC stress to safe levels in 24 V bus protection. |
| PPPM | 600 W (10/1000 µs) - Peak surge power handling; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance when properly mounted. |
| IPPM | 14.3 A - Peak pulse current capacity; derived from PPPM/VC, validated with 0.01 % duty cycle repetitive testing. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; supports standard SMT reflow without baking. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated terminals solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; symmetric conduction enables dual-polarity protection without external circuitry. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-suffix devices; no band marking confirms bidirectional functionality per Vishay specification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - required for engine control, ADAS sensor, and body electronics. |
| 600 W peak pulse power | Supports high-energy transients per ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5; enables single-device protection for CAN FD and LIN bus nodes. |
| Low clamping ratio (VC/VBR = 1.42) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V/5 V logic interfaces connected to 24 V supply rails. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirements and simplifies manufacturing flow for high-volume automotive PCB assembly. |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift over 15-year service life in harsh industrial environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) in engine coolant temperature sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt surge energy before reaching precision DAC or op-amp front-end. Use Value: Limits transient voltage to ≤42.1 V, preventing latch-up or gate oxide damage in downstream ASICs while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital input channels on programmable logic controller (PLC) modules interfacing with 24 V DC field devices subject to inductive switching spikes. IC Role / Device Role / Timing Role: Fast-response TVS placed at connector entry point to absorb 600 W surges before they propagate into optocoupler isolation stage. Use Value: Enables >100,000 surge cycles without degradation due to low incremental resistance and AEC-Q101 stress validation. |
| Telecom Power Rail Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding 24 V backup power inputs in VoIP gateways and base stations from lightning-induced surges on PoE-derived auxiliary supplies. IC Role / Device Role / Timing Role: Primary clamping device in series with fuse and common-mode choke; coordinates with secondary MOV for staged energy absorption. Use Value: Maintains UL 497B recognition and supports system-level IEC 61000-4-5 compliance up to 4 kV (line-to-ground) with minimal board space. | Use Scenario: Suppressing commutation spikes generated by brushed DC motors in smart washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted directly across motor terminals to clamp back-EMF transients before they couple into microcontroller GPIO or relay driver ICs. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and repeated 14.3 A pulses - extends MCU lifetime in high-durability white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA-E3/52 | Same VWM (26 V), but lower PPPM = 600 W (same rating), higher VC = 42.5 V; identical SMB (DO-214AA) footprint but 0.2 mm taller. | Compatible in same PCB layout only if height clearance ≥2.41 mm; not AEC-Q101 qualified. | Select SMBJ26CA-E3/52 only for cost-sensitive industrial designs where automotive qualification is unnecessary. |
| 1.5KE27CA | Higher PPPM = 1500 W, axial DO-201AD package, VC = 43.0 V; significantly larger size and manual assembly requirement. | Not suitable for automated SMT lines; used in legacy power supply designs with through-hole constraints. | Choose 1.5KE27CA only when board-level surge energy exceeds 600 W or when retrofitting existing through-hole designs. |
Compared with SMBJ26CA-E3/52 and 1.5KE27CA, the SMBG26CA-E3/52 uniquely combines AEC-Q101 qualification, SMBG's low-profile footprint (2.10 mm height), and optimized thermal resistance (RθJL = 20 °C/W) for high-density automotive modules requiring zero rework risk in reflow.
Availability
SMBG26CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom power supplies, and consumer appliance motor controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG26CA-E3/52 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, efficiency, and application-specific optimization.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, balancing low clamping voltage, AEC-Q101 compliance, and automated assembly compatibility.
FAQ
What is the breakdown voltage range of SMBG26CA-E3/52?
The SMBG26CA-E3/52 has a guaranteed breakdown voltage (VBR) range of 28.9 V to 31.9 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This range reflects the bidirectional avalanche characteristic and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88456). The SMBG26CA-E3/52 maintains tight VBR tolerance essential for predictable clamping behavior in safety-critical circuits.
Is SMBG26CA-E3/52 suitable for automotive applications?
Yes, SMBG26CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments with operating temperatures from -55 °C to +150 °C. It meets UL 497B recognition (QVGQ2) and supports ISO 7637-2 compliance when implemented with recommended 5.0 mm × 5.0 mm copper pads. The SMBG26CA-E3/52 is commonly deployed in ADAS camera modules, battery management systems, and engine control unit I/O protection.
What is the maximum clamping voltage of SMBG26CA-E3/52 at its rated peak pulse current?
The SMBG26CA-E3/52 exhibits a maximum clamping voltage (VC) of 42.1 V at its rated peak pulse current (IPPM) of 14.3 A, tested with a 10/1000 µs waveform. This value is measured under standardized conditions per Figure 1 in the Vishay datasheet and represents the upper limit of voltage seen by protected circuitry during worst-case surge events. The SMBG26CA-E3/52 achieves a clamping ratio of approximately 1.42 (VC/VBR), indicating efficient energy diversion.
Does SMBG26CA-E3/52 have polarity markings on its package?
No, SMBG26CA-E3/52 does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. As specified in the Vishay datasheet, "no marking on bidirectional types" - confirming symmetrical conduction in both directions. This distinguishes it from unidirectional variants like SMBG26A-E3/52, which include a band denoting the cathode end. The SMBG26CA-E3/52 must be placed without orientation dependency in PCB layout.
What is the thermal resistance specification for SMBG26CA-E3/52?
The SMBG26CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a junction-to-lead thermal resistance (RθJL) of 20 °C/W, both measured at TA = 25 °C on minimum recommended pad layout. These values are critical for thermal design in high-duty-cycle surge environments and confirm the device's suitability for compact, sealed enclosures. The SMBG26CA-E3/52 leverages its SMBG package's low RθJL to rapidly transfer heat to PCB copper, enhancing reliability beyond standard SMB variants.
SMBG26CA-E3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG26CA-E3/52 FAQ
1.How can I place an order for SMBG26CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG26CA-E3/52 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 SMBG26CA-E3/52 reliable?
The price and inventory of SMBG26CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG26CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG26CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG26CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG26CA-E3/52?
SMBG26CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG26CA-E3/52 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 SMBG26CA-E3/52?
For technical support, including SMBG26CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG26CA-E3/52 requirements.
6.How does Aetrix verify that SMBG26CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG26CA-E3/52 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 SMBG26CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG26CA-E3/52?
All SMBG26CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG26CA-E3/52, 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 SMBG26CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG26CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG26CA-E3/52 Tags
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