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Vishay General Semiconductor - Diodes Division SMBJ7.5CA-M3/5B
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- Part No.:
- SMBJ7.5CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA-M3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,353
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Product details
Overview
SMBJ7.5CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) 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 mA, 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), protecting MOSFETs, ICs, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the SMBJ7.5CA-M3/5B datasheet, SMBJ7.5CA-M3/5B pinout, SMBJ7.5CA-M3/5B application, or SMBJ7.5CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.55), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints, and its glass-passivated junction ensures stable leakage (<100 µA at VWM) and fast response time (<1.0 ps).
The SMBJ7.5CA-M3/5B delivers 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin in protected circuit. |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 600 W transient; determines maximum stress imposed on downstream components. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validated per ANSI/IEEE C62.35 standards. |
| ID @ VWM | 100 µA max - Reverse leakage at stand-off voltage; low enough to avoid signal integrity degradation in high-impedance nodes. |
| TJ max. | +150 °C - Maximum junction temperature; supports use in enclosed industrial enclosures without active cooling. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.205" × 0.130" footprint; compatible with standard reflow profiles (peak 260 °C, MSL Level 1). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as clamping node; bidirectional operation eliminates need for orientation-aware layout. |
| Case (body) | Thermal and mechanical interface | Non-conductive plastic body; heat dissipation relies on PCB copper pad area (0.2" × 0.2" per terminal recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity concerns-no cathode band marking required. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted on specified copper pads. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and consumer electronics without compromising surge robustness. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow processing without baking-reduces manufacturing overhead. |
| UL 497B recognized (QVGQ2) | Validated for telecom and data line protection applications requiring third-party safety certification. |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
Use Scenario: Protection of gate drivers and feedback lines against inductive kickback from brushed DC motors. IC Role / Device Role: Transient voltage suppressor placed across motor driver output or encoder signal pair. Use Value: Limits voltage spikes to ≤12.9 V, preventing latch-up or oxide damage in 12 V-rated logic and analog front-ends. |
Use Scenario: ESD and load-dump suppression on LIN bus or analog sensor outputs (e.g., temperature, pressure) in engine control modules. IC Role / Device Role: Bidirectional TVS on differential or single-ended sensor lines connected to microcontroller ADC inputs. Use Value: Maintains signal fidelity below 7.5 V stand-off while clamping 100 ns ESD events to <13 V, preserving measurement accuracy. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
Use Scenario: Overvoltage protection on -48 V DC telecom power distribution rails exposed to lightning-induced surges. IC Role / Device Role: Primary surge clamp on input side of DC-DC converter feeding base station subsystems. Use Value: Absorbs 600 W transients without degradation, enabling compliance with GR-1089-CORE immunity requirements. |
Use Scenario: Secondary-level surge protection on VBUS and CC lines of USB-C receptacles in portable monitors and docking stations. IC Role / Device Role: Low-capacitance TVS (CJ ≈ 200 pF typical at 0 V) placed adjacent to connector to limit ESD coupling into PMIC. Use Value: Clamps ±15 kV contact discharge to <13 V within nanoseconds, preventing USB PD controller reset or port enumeration failure. |
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-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3 suffix). | Preferred for commercial-grade designs where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement; identical footprint and solderability. |
| SMAJ7.5CA-M3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (140 °C/W). | Suitable only for lower-energy transients or space-constrained layouts where 600 W headroom is unnecessary. | Choose for compact designs accepting reduced surge margin; requires derating above 75 °C ambient. |
Compared with SMBJ7.5CA-M3/5B, the E3 variant offers identical protection performance at lower cost for non-halogen-sensitive applications, while the SMAJ7.5CA-M3 trades 33 % peak power and thermal performance for 30 % smaller board area-making SMBJ7.5CA-M3/5B optimal for industrial-grade 600 W surge resilience.
Availability
SMBJ7.5CA-M3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ7.5CA-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, power efficiency, and application-specific validation.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom infrastructure where sustained surge immunity and AEC-Q101 qualification options are critical.
FAQ
What is the clamping voltage of SMBJ7.5CA-M3/5B at its rated peak pulse current?
The SMBJ7.5CA-M3/5B has a maximum clamping voltage (VC) of 12.9 V at 46.5 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is confirmed in the Vishay datasheet Document Number 88392, page 2.
Is SMBJ7.5CA-M3/5B suitable for bidirectional signal line protection?
Yes, SMBJ7.5CA-M3/5B is explicitly designed for bidirectional applications, as indicated by the "CA" suffix. Its symmetrical breakdown behavior in both directions allows it to protect AC-coupled, differential, or floating signal paths-such as RS-485, CAN, or sensor bridges-without polarity-dependent installation.
Does SMBJ7.5CA-M3/5B meet automotive qualification standards?
The base SMBJ7.5CA-M3/5B is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the automotive variant SMBJ7.5CA-HM3_B/I, which carries the HM3 suffix and explicit AEC-Q101 qualification. Engineers requiring automotive-grade assurance must specify the HM3 version-not the M3/5B-per ordering code conventions in the datasheet.
What is the thermal resistance of SMBJ7.5CA-M3/5B, and how does it affect layout?
SMBJ7.5CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe operation under repetitive surges, the PCB must provide minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet's derating curves and mounting recommendations.
How does the M3 suffix in SMBJ7.5CA-M3/5B differ from E3?
The M3 suffix denotes halogen-free, RoHS-compliant construction, whereas E3 indicates RoHS-compliant but standard brominated flame retardant molding compound. Both share identical electrical performance and package dimensions, but M3 satisfies stricter environmental mandates such as JEDEC J-STD-201 Class 2 whisker resistance and IPC-1752 material declarations required in EU and Asia-Pacific markets.
SMBJ7.5CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ7.5CA-M3/5B FAQ
1.How can I place an order for SMBJ7.5CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA-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 SMBJ7.5CA-M3/5B reliable?
The price and inventory of SMBJ7.5CA-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 SMBJ7.5CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA-M3/5B?
SMBJ7.5CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA-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 SMBJ7.5CA-M3/5B?
For technical support, including SMBJ7.5CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ7.5CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA-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 SMBJ7.5CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA-M3/5B?
All SMBJ7.5CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA-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 SMBJ7.5CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA-M3/5B Tags
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