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Vishay General Semiconductor - Diodes Division SMBJ7.5CD-M3/H
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- Part No.:
- SMBJ7.5CD-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CD-M3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
SMBJ7.5CD-M3/H 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 and power lines. It features a 7.5 V stand-off voltage (VWM), 8.46–9.08 V breakdown voltage (VBR) at 1 mA, 12.7 V maximum clamping voltage (VC) at 75 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the SMBJ7.5CD-M3/H datasheet, SMBJ7.5CD-M3/H pinout, SMBJ7.5CD-M3/H application, or SMBJ7.5CD-M3/H equivalent, key selection criteria include bidirectional polarity, ±3.5 % VBR tolerance, low leakage (<500 μA at VWM), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its silicon avalanche structure delivers sub-nanosecond response time and low dynamic impedance, ensuring effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 600 W peak pulse power (10/1000 μs), with thermal resistance RθJA = 125 °C/W on standard PCB pad layout and junction temperature range from –55 °C to +150 °C. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
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. |
| VBR min/max | 8.46 V / 9.08 V at 1 mA - Tight ±3.5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 12.7 V at 75 A - Clamping voltage under full-rated surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W (10/1000 μs) - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| ID @ VWM | ≤500 μA - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Enables reliable operation in industrial and automotive under-hood environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline compatible with automated assembly and IPC-7351B footprints. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow), JESD 201 Class 2 whisker resistant. Bidirectional construction has no cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping occurs regardless of polarity - essential for AC line or differential bus protection. |
| Cathode Band (absent) | Polarity indicator | Not present on bidirectional variants like SMBJ7.5CD-M3/H; confirms symmetrical behavior and eliminates orientation-dependent placement errors. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, and transformer-coupled interfaces without external polarity management. |
| ±3.5 % VBR tolerance | Reduces design margin overhead and improves consistency in multi-channel protection schemes across production units. |
| 600 W peak pulse rating | Supports robust immunity to IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit) when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. |
| Low leakage (≤500 μA) | Preserves accuracy in precision analog front-ends and battery-powered sensor nodes where quiescent current impacts runtime. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile usage without baking - reduces manufacturing complexity and cost. |
Applications
| Industrial Sensor Interface | RS-485 Communication Line |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to motor drive noise and relay switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry point to shunt surge energy before reaching ADC input or signal conditioner IC. Use Value: Limits transient voltage to ≤12.7 V during 75 A surges, preventing latch-up or permanent damage to 3.3 V/5 V signal chain components. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., MAX13487) against ESD and cable discharge events in building control networks. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B differential pair and ground to clamp common-mode surges without disrupting DC bias or data integrity. Use Value: Maintains signal fidelity by clamping within 1 ns while adding <1 pF capacitance - avoids data rate degradation at up to 20 Mbps. |
| AC Power Input Stage | Automotive Body Control Module I/O |
Use Scenario: Secondary surge protection on 24 V AC input rectifier outputs in HVAC controllers subjected to lightning-induced surges on long building wiring runs. IC Role / Device Role / Timing Role: Parallel-connected TVS downstream of MOV-based primary protection, absorbing residual fast-rising energy that bypasses bulk clamping. Use Value: Delivers precise 12.7 V clamping ceiling to safeguard downstream 35 V-rated bridge rectifiers and filter capacitors. |
Use Scenario: Protecting LIN bus pins and switch inputs in BCMs exposed to load dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed at connector interface to absorb ±100 V/50 ms load dump spikes and ISO 7637-2 Pulse 5a/b events. Use Value: Withstands junction temperatures up to +150 °C and maintains clamping performance after repeated surge exposure - critical for under-hood reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.5CA | Same SMB package, 7.5 V VWM, but wider VBR tolerance (±5 %); 600 W rating; higher ID (1000 μA). | Acceptable for less sensitive analog circuits; may require larger layout margin due to looser VBR spec. | Select when cost sensitivity outweighs tight clamping threshold control and lower leakage is noncritical. |
| ON Semiconductor SMCJ7.5CA | SMC (DO-214AB) package - larger footprint and higher thermal mass; identical VWM/VBR/VC specs; same 600 W rating. | Preferred where board space allows and higher steady-state power dissipation (PD = 1.5 W vs. 1.0 W) is needed for repetitive surge environments. | Choose when thermal derating headroom or long-term surge endurance under frequent transients is prioritized over compactness. |
Compared with SMBJ7.5CD-M3/H, SMAJ7.5CA trades tighter VBR control and lower leakage for broader availability and lower unit cost, while SMCJ7.5CA offers superior thermal performance at the expense of PCB area - making SMBJ7.5CD-M3/H optimal for space-constrained, precision-clamping industrial and automotive I/O designs.
Availability
SMBJ7.5CD-M3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication lines, and automotive body control module I/O requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SMBJ7.5CD-M3/H 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, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping, low leakage, and MSL-compliant manufacturability are mandatory.
FAQ
What is the polarity configuration of SMBJ7.5CD-M3/H?
SMBJ7.5CD-M3/H is a bidirectional transient voltage suppressor, meaning it functions identically in both forward and reverse directions. Unlike unidirectional variants (e.g., SMBJ7.5D), it has no cathode band and provides symmetrical clamping - ideal for protecting AC-coupled signals, differential buses like RS-485, or transformer-isolated interfaces where polarity cannot be assumed.
Does SMBJ7.5CD-M3/H meet UL recognition requirements?
Yes, SMBJ7.5CD-M3/H carries Underwriters Laboratory recognition under UL 497B (QVGQ2) for both unidirectional and bidirectional transient protectors, with file number E136766. This certification validates its suitability for use in safety-critical surge protection applications across consumer, industrial, and telecom equipment meeting North American regulatory requirements.
What is the maximum clamping voltage of SMBJ7.5CD-M3/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CD-M3/H is 12.7 V when subjected to its rated peak pulse current of 75 A using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the M3/H suffix affect SMBJ7.5CD-M3/H's compliance and packaging?
The "M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance, while "/H" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This format supports high-speed pick-and-place assembly and satisfies environmental and reliability requirements for industrial-grade production.
Can SMBJ7.5CD-M3/H replace SMBJ7.5D in an existing design?
No - SMBJ7.5CD-M3/H is bidirectional, whereas SMBJ7.5D is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMBJ7.5CD-M3/H is appropriate for AC or differential lines, but will not provide correct polarity-sensitive clamping on DC power rails or unidirectional signal paths where SMBJ7.5D is specified. Layout and schematic review is mandatory before interchange.
SMBJ7.5CD-M3/H 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):
- 8.46V
- Voltage - Clamping (Max) @ Ipp:
- 12.7V
- Current - Peak Pulse (10/1000µs):
- 47.2A
- 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)
SMBJ7.5CD-M3/H FAQ
1.How can I place an order for SMBJ7.5CD-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CD-M3/H 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 SMBJ7.5CD-M3/H reliable?
The price and inventory of SMBJ7.5CD-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CD-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CD-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CD-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CD-M3/H?
SMBJ7.5CD-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CD-M3/H 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 SMBJ7.5CD-M3/H?
For technical support, including SMBJ7.5CD-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CD-M3/H requirements.
6.How does Aetrix verify that SMBJ7.5CD-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CD-M3/H 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 SMBJ7.5CD-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CD-M3/H?
All SMBJ7.5CD-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CD-M3/H, 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 SMBJ7.5CD-M3/H part is unused and in its original packaging.
Return procedure for SMBJ7.5CD-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CD-M3/H Tags
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Diodes Incorporated
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