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Vishay General Semiconductor - Diodes Division SMBG7.5CA-M3/52
- Part No.:
- SMBG7.5CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG7.5CA-M3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,067
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Product details
Overview
SMBG7.5CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal 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 (IPPM), and 600 W peak pulse power (10/1000 μs waveform). It is AEC-Q101 qualified and halogen-free, targeting automotive sensor line protection.
For engineers reviewing the SMBG7.5CA-M3/52 datasheet, SMBG7.5CA-M3/52 pinout, SMBG7.5CA-M3/52 application, or SMBG7.5CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, low VC/VWM ratio (1.72), 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 surge protector in both polarities, leveraging an avalanche breakdown mechanism to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for unclamped transient suppression per IEC 61000-4-5 (10/1000 μs), it delivers 46.5 A peak pulse current with ≤12.9 V clamping at TA = 25 °C and derates linearly above 25 °C per Fig. 2. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before leakage exceeds 100 μA |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Ensures reliable conduction onset across manufacturing lot variation |
| VC @ IPPM | 12.9 V at 46.5 A - Limits protected node voltage during 600 W transient event |
| PPPM | 600 W (10/1000 μs) - Withstands automotive load-dump and ISO 7637-2 pulse 5a surges |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| MSL Level | Level 1 (J-STD-020) - Supports lead-free reflow up to 260 °C peak without baking |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative transients |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Meets ISO 7637-2 Pulse 5a (50 V, 100 ms) and IEC 61000-4-5 Combination Wave (0.5/1.0 μs) requirements |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or LIN drivers |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS compliant (M3 suffix) | Supports environmental compliance for global OEM supply chains without compromising surge robustness |
Applications
| Automotive Sensor Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt transients before reaching sensor signal conditioning circuitry. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V sensor interface ICs. | Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across CAN_H/CAN_L pair to clamp common-mode surges while preserving signal integrity. Use Value: Maintains <1 ns response time and <15 pF junction capacitance (typ.) to avoid CAN bit timing distortion or reflection. |
| Industrial PLC I/O Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding 24 V digital input modules in programmable logic controllers from inductive switching spikes generated by solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at terminal block entry to absorb 600 W surges without degradation over 100,000+ cycles. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and PCB area. | Use Scenario: Adding secondary-level ESD protection to USB 2.0 data lines (D+/D−) in smart home hubs where primary protection resides upstream. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to USB connector to clamp ±15 kV contact discharge per IEC 61000-4-2. Use Value: Delivers <15 pF typical capacitance and sub-1 ns response, ensuring no USB 480 Mbps eye diagram 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 1.5 kW peak (non-repetitive); SMB (DO-214AA) package, 2.54 mm lead pitch vs. SMBG's 3.56 mm | Less thermal margin in sustained surge scenarios; requires larger pad layout due to wider body | Select when legacy SMB footprint is fixed and higher single-pulse energy tolerance is needed |
| SMCJ7.5CA | Same electrical specs; higher PPPM = 1500 W; SMC (DO-214AB) package, 5.59 mm body width, higher RθJA = 150 °C/W | Over-specified for most 600 W use cases; occupies >2× PCB area; less suitable for dense automotive layouts | Choose only when system-level testing demands >1 kW surge headroom and space permits |
Compared with SMBJ7.5CA and SMCJ7.5CA, SMBG7.5CA-M3/52 offers optimal balance of 600 W capability, compact SMBG footprint (4.57 mm × 3.94 mm), AEC-Q101 qualification, and halogen-free compliance-making it preferred for space-constrained, automotive-grade signal line protection.
Availability
SMBG7.5CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, CAN bus nodes, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMBG7.5CA-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBG series was developed specifically for high-reliability, surface-mount transient suppression in automotive and industrial environments-prioritizing AEC-Q101 qualification, low-profile packaging, and consistent clamping performance across temperature and lifetime.
FAQ
What is the maximum clamping voltage of SMBG7.5CA-M3/52 at its rated peak pulse current?
The SMBG7.5CA-M3/52 has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 46.5 A, measured under the standard 10/1000 μs waveform condition. This value ensures downstream 5 V or 3.3 V ICs remain within safe operating voltage limits during surge events. The SMBG7.5CA-M3/52 maintains this clamping performance across its full operating junction temperature range of –55 °C to +150 °C.
Is SMBG7.5CA-M3/52 suitable for automotive applications?
Yes, SMBG7.5CA-M3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its +150 °C maximum junction temperature, MSL Level 1 rating for lead-free reflow, and validation across temperature cycling, highly accelerated life testing (HALT), and surge endurance make it appropriate for engine control units, body control modules, and ADAS sensor interfaces. The SMBG7.5CA-M3/52 meets ISO 7637-2 and IEC 61000-4-5 immunity requirements when applied per Vishay's recommended layout.
How does the SMBG7.5CA-M3/52 differ from unidirectional variants like SMBG7.5A-M3/52?
The SMBG7.5CA-M3/52 is bidirectional, meaning it clamps voltage transients of either polarity symmetrically, with identical VBR, VC, and IPPM specifications in both directions. In contrast, SMBG7.5A-M3/52 is unidirectional and includes a cathode band marking; it conducts only during positive transients relative to the marked cathode and cannot protect AC or floating lines without additional components. The SMBG7.5CA-M3/52 eliminates polarity dependency, simplifying design for differential or unbiased signal paths.
What is the junction capacitance of SMBG7.5CA-M3/52, and why does it matter?
The typical junction capacitance (CJ) of SMBG7.5CA-M3/52 is less than 15 pF at zero bias and VWM = 7.5 V, as specified in Fig. 4 of the Vishay datasheet. This low capacitance prevents signal integrity degradation in high-speed interfaces such as CAN FD, LIN, or USB 2.0. For example, in a 1 Mbps CAN bus, <15 pF adds negligible rise-time delay or reflection-ensuring the SMBG7.5CA-M3/52 can be placed directly at the connector without equalization or compensation.
Does SMBG7.5CA-M3/52 require a heatsink for standard operation?
No, SMBG7.5CA-M3/52 does not require an external heatsink for standard transient suppression duty cycles (e.g., <0.01 % duty cycle per datasheet). Its thermal resistance is 100 °C/W junction-to-ambient when mounted on 5.0 mm × 5.0 mm copper pads per JEDEC standards. Under typical automotive or industrial surge conditions-single pulses or infrequent events-the device self-cools adequately. However, for repetitive surges exceeding 1 Hz, thermal simulation using RθJA = 100 °C/W and power dissipation derived from IPPM² × RSURGE is recommended to verify SMBG7.5CA-M3/52 junction temperature remains below +150 °C.
SMBG7.5CA-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):
- 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-M3/52 FAQ
1.How can I place an order for SMBG7.5CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG7.5CA-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 SMBG7.5CA-M3/52 reliable?
The price and inventory of SMBG7.5CA-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 SMBG7.5CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG7.5CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG7.5CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG7.5CA-M3/52?
SMBG7.5CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG7.5CA-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 SMBG7.5CA-M3/52?
For technical support, including SMBG7.5CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG7.5CA-M3/52 requirements.
6.How does Aetrix verify that SMBG7.5CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG7.5CA-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 SMBG7.5CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG7.5CA-M3/52?
All SMBG7.5CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG7.5CA-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 SMBG7.5CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG7.5CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG7.5CA-M3/52 Tags
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