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Vishay General Semiconductor - Diodes Division SMBG7.5CA-M3/5B
- Part No.:
- SMBG7.5CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG7.5CA-M3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,214
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Product details
Overview
SMBG7.5CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers.
For engineers reviewing the SMBG7.5CA-M3/5B datasheet, SMBG7.5CA-M3/5B pinout, SMBG7.5CA-M3/5B application, or SMBG7.5CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), low clamping ratio (VC/VBR ≈ 1.55), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical bidirectional avalanche behavior - no polarity marking required. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables fast response (<1 ns) to ESD and lightning-induced transients.
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" pads) and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - defines tight breakdown tolerance for predictable turn-on |
| VC @ IPPM | 12.9 V at 46.5 A - clamping voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform, 0.01% duty cycle |
| ID @ VWM | <1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ range | –55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Package | SMBG (DO-215AA) - surface-mount, low-profile, MSL Level 1, 260 °C reflow compatible |
Pinout & Package
Two-terminal bidirectional device in SMBG (DO-215AA) package: no polarity marking; both terminals are electrically symmetrical. Case outline conforms to JEDEC DO-215AA standard with 0.235"–0.255" body length, 0.130"–0.155" width, and 0.075"–0.095" height. Matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; symmetrical conduction in both directions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements without compromising thermal or electrical performance |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy surges common in automotive load-dump and inductive switching events |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of the interface IC. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or damage to 5 V or 3.3 V automotive microcontrollers and transceivers. | Use Scenario: Safeguarding PLC digital input modules and analog acquisition channels against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point, shunting energy to ground before reaching protection ICs or isolators. Use Value: Withstands repetitive 600 W transients while maintaining sub-µA leakage, preserving accuracy of high-impedance measurement circuits. |
| Telecom Line Driver Protection | Consumer USB/Display Interface Protection |
Use Scenario: Shielding RS-485/RS-232 transceivers and Ethernet PHYs from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp placed between line driver output and connector, referenced to local ground. Use Value: Sub-1 ns response time and 12.9 V clamping ensure signal integrity is maintained during 10/1000 µs surges up to 46.5 A. | Use Scenario: Guarding HDMI, USB 2.0, or DisplayPort data lanes in notebooks and docking stations against ESD per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed directly at connector pins to divert ESD before reaching serializer/deserializer ICs. Use Value: Clamps ESD events below 13 V while adding negligible capacitance to high-speed signal paths, avoiding signal 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 |
|---|---|---|---|
| SMBJ7.5CA | Same VWM, VBR, VC; lower PPPM = 600 W but rated for 10/1000 µs only (not 8.3 ms surge); SMB (DO-214AA) package, larger footprint | Less suitable for automotive load-dump where longer surge duration matters; requires PCB layout change | Select SMBG7.5CA-M3/5B when space-constrained SMT placement and AEC-Q101 qualification are mandatory |
| SAC7.5 | Same VWM and bidirectional function; lower PPPM = 400 W; SOD-123FL package; not AEC-Q101 qualified | Limited to consumer/industrial use; insufficient for automotive under-hood environments | Choose SMBG7.5CA-M3/5B for mission-critical automotive or industrial deployments requiring validated reliability |
Compared with SMBJ7.5CA and SAC7.5, SMBG7.5CA-M3/5B delivers identical clamping performance in a smaller, AEC-Q101-qualified SMBG package - enabling higher board density and certified automotive deployment without sacrificing surge margin.
Availability
SMBG7.5CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line driver protection requiring stable component supply, halogen-free compliance, and AEC-Q101 assurance.
Supply support for SMBG7.5CA-M3/5B 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 developed for high-reliability surface-mount transient suppression in space-constrained automotive and industrial systems - prioritizing AEC-Q101 qualification, low clamping voltage, and robust surge handling in compact DO-215AA packaging.
FAQ
What is the clamping voltage of SMBG7.5CA-M3/5B at its rated peak pulse current?
The SMBG7.5CA-M3/5B has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 46.5 A, measured using a 10/1000 µs waveform. This value ensures downstream components such as 5 V microcontrollers or CAN transceivers remain within safe operating limits during surge events. The SMBG7.5CA-M3/5B achieves this with a low clamping ratio of approximately 1.55 relative to its minimum breakdown voltage.
Is SMBG7.5CA-M3/5B suitable for automotive applications?
Yes, SMBG7.5CA-M3/5B is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and sensor interfaces exposed to load dump, jump start, and ISO 7637-2 transients. Its operating junction temperature range of –55 °C to +150 °C, MSL Level 1 rating, and halogen-free M3 construction meet stringent automotive manufacturing and reliability requirements. The SMBG7.5CA-M3/5B is documented in Vishay's AEC-Q101 qualified product list.
How does the M3 suffix affect SMBG7.5CA-M3/5B's compliance and performance?
The M3 suffix on SMBG7.5CA-M3/5B indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 and JESD22-B102 Class 2 whisker resistance. It does not alter electrical specifications versus E3 variants but ensures environmental compliance for modern automotive and industrial supply chains. The SMBG7.5CA-M3/5B retains identical VWM, VBR, VC, and PPPM ratings - performance is unchanged, only material content is upgraded.
What is the thermal resistance of SMBG7.5CA-M3/5B, and how does it impact layout design?
SMBG7.5CA-M3/5B 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 standard PCB layout per Vishay's recommended pad dimensions. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace impedance. The SMBG7.5CA-M3/5B also exhibits RθJL = 20 °C/W, indicating efficient heat transfer to PCB leads.
Can SMBG7.5CA-M3/5B be used in bidirectional signal lines like RS-485 or CAN bus?
Yes, SMBG7.5CA-M3/5B is explicitly designed for bidirectional applications - its CA suffix denotes symmetrical clamping in both polarities, making it ideal for differential buses such as RS-485, CAN, LIN, and USB D+/D– lines. With no polarity marking and matched VBR in either direction (8.33–9.21 V), the SMBG7.5CA-M3/5B provides balanced protection without requiring orientation verification during assembly.
SMBG7.5CA-M3/5B 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBG7.5CA-M3/5B FAQ
1.How can I place an order for SMBG7.5CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG7.5CA-M3/5B 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 SMBG7.5CA-M3/5B reliable?
The price and inventory of SMBG7.5CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG7.5CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG7.5CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG7.5CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG7.5CA-M3/5B?
SMBG7.5CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG7.5CA-M3/5B 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 SMBG7.5CA-M3/5B?
For technical support, including SMBG7.5CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG7.5CA-M3/5B requirements.
6.How does Aetrix verify that SMBG7.5CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG7.5CA-M3/5B 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 SMBG7.5CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG7.5CA-M3/5B?
All SMBG7.5CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG7.5CA-M3/5B, 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 SMBG7.5CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG7.5CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG7.5CA-M3/5B Tags
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