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Vishay General Semiconductor - Diodes Division SMBG43CA-E3/52
- Part No.:
- SMBG43CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG43CA-E3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,342
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Product details
Overview
SMBG43CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 69.4 V at 8.6 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG43CA-E3/52 datasheet, SMBG43CA-E3/52 pinout, SMBG43CA-E3/52 application, or SMBG43CA-E3/52 equivalent, this device is evaluated for ESD/surge protection in CAN bus interfaces, sensor supply rails, automotive infotainment I/O, and industrial PLC analog inputs where bidirectional clamping, low leakage (<1 µA at 43 V), and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, IPPM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive transients.
Designed for surface-mount automated placement, it uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating. Thermal resistance is RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting operation from −55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 36–42 V nominal systems. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed breakdown range ensures reliable triggering without premature conduction. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamping voltage limits downstream IC stress during 600 W 10/1000 µs surge events. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000 µs waveform, duty cycle ≤ 0.01 %. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount gull-wing leaded case with no polarity marking (bidirectional). Dimensions: 6.48 mm × 3.94 mm × 2.41 mm (L × W × H); 0.255" × 0.155" × 0.095". Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Terminal K | Other side of symmetrical PN junction; connects to same protected line (e.g., CAN_H or RS-485 A) - no polarity distinction in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions enables single-device protection of AC-coupled or differential lines like CAN, RS-485, and audio. |
| 600 W surge rating (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) when properly laid out, reducing need for multi-stage protection. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage during transients, protecting 5 V–48 V logic and analog front-ends without additional series impedance. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces requiring extended lifetime and thermal stability. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling. |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle ECUs against load dump, jump-start spikes, and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at connector entry point to divert surge energy to ground before reaching CAN transceiver. Use Value: Maintains signal integrity during 43 V stand-off while clamping 10/1000 µs transients to ≤69.4 V - within absolute maximum rating of common CAN transceivers (e.g., TJA1042, SN65HVD230). | Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS mounted across A/B terminals to suppress common-mode and differential-mode transients without distorting data waveforms. Use Value: Symmetrical clamping ensures equal protection on both A and B lines; <1 µA leakage avoids bias current errors in precision termination networks. |
| Automotive Sensor Power Rail | Consumer Audio Line Input |
Use Scenario: Protecting 5 V–12 V supply inputs to MEMS pressure sensors or camera modules in ADAS subsystems from battery rail disturbances. IC Role / Device Role / Timing Role: Standoff-connected TVS between VCC and GND, activated only during overvoltage events to prevent latch-up or oxide damage in downstream LDOs and ASICs. Use Value: 43 V VWM accommodates 12 V system tolerances (up to 16 V) and 24 V systems (with derating); 150 °C rating supports under-hood mounting. | Use Scenario: Shielding line-in jacks on smart speakers and AV receivers from ESD and induced transients during cable hot-plug or nearby RF interference. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (typ. ~200 pF at 0 V) placed inline with unbalanced audio path to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 µA leakage prevents DC offset in AC-coupled amplifier stages; compact SMBG footprint saves PCB area versus SMA/SMB alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/52 | Same VWM (43 V), but lower PPPM = 600 W (same rating), higher VC = 70.1 V at 8.5 A; identical SMB (DO-214AA) package outline but different pad layout. | SMBJ has slightly larger body (4.57 mm × 3.94 mm vs. SMBG's 4.57 mm × 3.94 mm length/width but thinner profile); not drop-in due to differing land pattern and thermal pad requirements. | Select SMBJ43CA-E3/52 only if existing PCB uses SMB footprint and thermal design accommodates higher RθJA. |
| 1.5KE43CA | Higher PPPM = 1500 W, axial-leaded DO-201AD package, VC = 70.1 V at 21.5 A; no AEC-Q101 qualification. | Through-hole mounting only; unsuitable for automated SMT lines or space-constrained automotive modules. | Choose only for prototyping or legacy through-hole designs where board real estate and assembly method permit. |
Compared with SMBJ43CA-E3/52 and 1.5KE43CA, SMBG43CA-E3/52 delivers identical electrical protection performance in a lower-profile, AEC-Q101-qualified SMT package optimized for automotive and industrial PCBs requiring high-density layout and reflow compatibility - without compromising clamping accuracy or thermal robustness.
Availability
SMBG43CA-E3/52 is available at Aetrix Electronics and suitable for automotive CAN bus protection, industrial RS-485 interface hardening, and sensor power rail safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBG43CA-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 TransZORB® series was developed to deliver high-power, low-profile transient suppression for automotive and industrial electronics where AEC-Q101 compliance, precise clamping, and automated assembly are mandatory.
FAQ
What is the breakdown voltage range for SMBG43CA-E3/52?
The SMBG43CA-E3/52 has a guaranteed breakdown voltage (VBR) range of 47.8 V to 52.8 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots and temperature extremes, critical for predictable clamping in automotive and industrial surge protection circuits using SMBG43CA-E3/52.
Is SMBG43CA-E3/52 suitable for CAN FD physical layer protection?
Yes, SMBG43CA-E3/52 is suitable for CAN FD protection due to its bidirectional symmetry, low clamping voltage (69.4 V), and fast response time. Its 43 V VWM provides adequate margin above CAN FD's 5 V nominal common-mode range, and its <1 µA leakage avoids signal distortion. The SMBG43CA-E3/52's AEC-Q101 qualification further validates its suitability for automotive CAN FD nodes.
Does SMBG43CA-E3/52 have polarity markings on the package?
No, SMBG43CA-E3/52 does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMBG43A), the CA suffix indicates symmetrical operation - both terminals function identically as anode/cathode depending on transient polarity. This eliminates orientation concerns during automated placement of SMBG43CA-E3/52.
What is the maximum operating temperature for SMBG43CA-E3/52?
The SMBG43CA-E3/52 has a maximum junction temperature (TJ) rating of +150 °C and operates from −55 °C to +150 °C. This wide range supports under-hood automotive applications and high-temperature industrial environments. Derating curves in the Vishay datasheet (Fig. 2) define allowable power dissipation above 25 °C ambient, ensuring reliable operation of SMBG43CA-E3/52 across thermal conditions.
How does SMBG43CA-E3/52 compare to unidirectional SMBG43A-E3/52 in circuit design?
SMBG43CA-E3/52 provides symmetrical clamping for AC or differential signals (e.g., CAN, RS-485), while SMBG43A-E3/52 is for DC-biased lines requiring cathode-to-rail connection. SMBG43CA-E3/52 eliminates need for external series diodes in bidirectional paths and simplifies layout. Both share identical VWM, VBR, and PPPM, but only SMBG43CA-E3/52 supports true two-quadrant transient suppression - a key distinction when selecting SMBG43CA-E3/52.
SMBG43CA-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
SMBG43CA-E3/52 FAQ
1.How can I place an order for SMBG43CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG43CA-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 SMBG43CA-E3/52 reliable?
The price and inventory of SMBG43CA-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 SMBG43CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG43CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG43CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG43CA-E3/52?
SMBG43CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG43CA-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 SMBG43CA-E3/52?
For technical support, including SMBG43CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG43CA-E3/52 requirements.
6.How does Aetrix verify that SMBG43CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG43CA-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 SMBG43CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG43CA-E3/52?
All SMBG43CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG43CA-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 SMBG43CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG43CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG43CA-E3/52 Tags
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