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Vishay General Semiconductor - Diodes Division SMBG51CA-M3/52
- Part No.:
- SMBG51CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG51CA-M3/52.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,235
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Product details
Overview
SMBG51CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 51 V standoff voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), and clamps transients to ≤82.4 V at 7.3 A, making it suitable for automotive sensor line protection and industrial I/O interface surge suppression.
For engineers reviewing the SMBG51CA-M3/52 datasheet, SMBG51CA-M3/52 pinout, SMBG51CA-M3/52 application, or SMBG51CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and verified performance under 10/1000 μs surge waveforms per IEC 61000-4-5.
Technical Context
This device operates as a voltage-clamped shunt protector with symmetrical bidirectional conduction-no polarity marking required. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at 51 V), while thermal resistance RθJA = 100 °C/W supports operation up to +150 °C junction temperature.
The SMBG51CA-M3/52 delivers repeatable 600 W surge handling at 0.01 % duty cycle, with clamping voltage VC = 82.4 V measured at IPPM = 7.3 A. Its low incremental surge resistance enables fast response (<1 ns) and minimal let-through energy during ESD or lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 56.7 V / 62.7 V at 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on across temperature and unit variation. |
| VC @ IPPM | 82.4 V at 7.3 A - Clamping voltage under 10/1000 μs surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power rating; validates survivability against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω). |
| ID @ VWM | <1.0 μA - Reverse leakage at rated standoff; ensures negligible DC loading on high-impedance sensor or communication lines. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial ambient environments. |
| Package | SMBG (DO-215AA) - Surface-mount outline with 0.235" × 0.255" footprint; optimized for automated placement and thermal pad layout. |
Pinout & Package
SMBG51CA-M3/52 uses a two-terminal SMBG (DO-215AA) package with no polarity marking-terminals are symmetrical for bidirectional operation. The case conforms to JEDEC DO-215AA mechanical standard, featuring matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Case (cathode side not defined) | Thermal and mechanical anchor | Mounts to 5.0 mm × 5.0 mm copper pads per terminal for optimal heat dissipation and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-201 Class 2 whisker resistance; supports green manufacturing requirements. |
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against severe transients per ISO 7637-2 Pulse 5a and IEC 61000-4-5 combination wave. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes let-through voltage relative to breakdown, reducing risk of latch-up or damage in protected CMOS interfaces. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed directly at sensor connector to limit voltage excursions to ≤82.4 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents sensor IC latch-up or permanent damage while maintaining signal integrity below 51 V nominal operating range. |
Use Scenario: Surge suppression on CAN_H and CAN_L lines in vehicle body control modules exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) providing common-mode and differential-mode transient clamping without polarity constraints. Use Value: Ensures CAN transceiver survival under 400 W/10/1000 μs surges while preserving bus timing margins due to sub-nanosecond response. |
| Telecom Line Interface | Industrial PLC Analog Input |
|
Use Scenario: Protecting RS-485 transceiver inputs in outdoor telecom cabinets subject to lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed between differential pair and transceiver pins to clamp both polarities of induced common-mode transients. Use Value: Limits peak differential voltage to <100 V, preventing transceiver input stage breakdown while maintaining >10 kV ESD immunity. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges caused by motor contactor switching. IC Role / Device Role / Timing Role: Shunt protector across loop terminals to divert surge current away from precision op-amp front-end and ADC reference circuitry. Use Value: Maintains measurement accuracy by limiting voltage excursion to ≤82.4 V, avoiding saturation or reset of signal conditioning stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA-M3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 9.2 A; identical SMB package but slightly larger thermal pad requirement. | Designed for general-purpose industrial use; lacks AEC-Q101 qualification and M3 halogen-free certification. | Select when automotive qualification is unnecessary and cost optimization is prioritized over automotive compliance. |
| SMCJ51CA-M3/52 | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 35 °C/W vs. 100 °C/W, enabling higher sustained surge duty cycles. | Preferred for high-reliability industrial systems requiring >1000 surges over lifetime; not suitable for space-constrained PCB layouts. | Choose when thermal performance under repetitive surges is critical and board area permits larger footprint. |
Compared with SMBG51CA-M3/52, SMBJ51CA-M3/52 offers identical clamping but no automotive qualification, while SMCJ51CA-M3/52 trades compact size for superior thermal robustness-making SMBG51CA-M3/52 the optimal balance of AEC-Q101 compliance, space efficiency, and 600 W surge capability.
Availability
SMBG51CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interfaces, and telecom line surge suppression requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBG51CA-M3/52 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMBG series was engineered specifically for AEC-Q101-compliant surface-mount transient suppression in space-constrained automotive ECUs and industrial control units where bidirectional clamping and halogen-free compliance are mandatory.
FAQ
What is the breakdown voltage range of SMBG51CA-M3/52?
The SMBG51CA-M3/52 has a minimum breakdown voltage (VBR) of 56.7 V and a maximum of 62.7 V at 1 mA test current, as specified in the Vishay datasheet document 88456. This ±5 % tolerance ensures consistent clamping behavior across production lots and temperature ranges, and is confirmed for the exact SMBG51CA-M3/52 variant-not extrapolated from adjacent part numbers.
Is SMBG51CA-M3/52 qualified for automotive applications?
Yes, SMBG51CA-M3/52 is AEC-Q101 qualified, as explicitly stated in the "MECHANICAL DATA" section of the Vishay datasheet (document 88456, revision 09-Jan-2024). This qualification covers stress tests including HTGB, HTRB, temperature cycling, and ESD, confirming suitability for under-hood and chassis-mounted automotive electronics.
What does the "M3" suffix indicate in SMBG51CA-M3/52?
The "M3" suffix in SMBG51CA-M3/52 denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. Per Vishay's ordering information table, M3 parts are industrial grade and distinct from HE3/HM3 variants which add AEC-Q101 qualification-though SMBG51CA-M3/52 itself carries both M3 and AEC-Q101.
What is the clamping voltage of SMBG51CA-M3/52 at its rated surge current?
The SMBG51CA-M3/52 clamps to a maximum of 82.4 V at its peak pulse current (IPPM) of 7.3 A under a 10/1000 μs waveform, as published in the "ELECTRICAL CHARACTERISTICS" table of the Vishay datasheet. This value is measured and guaranteed-not typical-and defines the upper voltage limit imposed on protected circuits during standardized surge events.
Does SMBG51CA-M3/52 require polarity-aware PCB layout?
No, SMBG51CA-M3/52 is a bidirectional TVS diode with symmetrical terminals and no cathode band marking. As confirmed in the "POLARITY" section of the Vishay datasheet, bidirectional types like SMBG51CA-M3/52 conduct identically in both directions, eliminating orientation constraints during PCB placement and simplifying layout for differential or AC-coupled signal lines.
SMBG51CA-M3/52 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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG51CA-M3/52 FAQ
1.How can I place an order for SMBG51CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG51CA-M3/52 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 SMBG51CA-M3/52 reliable?
The price and inventory of SMBG51CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG51CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG51CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG51CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG51CA-M3/52?
SMBG51CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG51CA-M3/52 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 SMBG51CA-M3/52?
For technical support, including SMBG51CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG51CA-M3/52 requirements.
6.How does Aetrix verify that SMBG51CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG51CA-M3/52 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 SMBG51CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG51CA-M3/52?
All SMBG51CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG51CA-M3/52, 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 SMBG51CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG51CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG51CA-M3/52 Tags
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