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Vishay General Semiconductor - Diodes Division SMBJ7.0A-M3/5B
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- Part No.:
- SMBJ7.0A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0A-M3/5B.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
SMBJ7.0A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on DC power rails and signal lines. It features a 7.0 V stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 50.0 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 µs waveform - used to protect MOSFETs, microcontrollers, and sensor interfaces in industrial motor drives and automotive body electronics.
For engineers reviewing the SMBJ7.0A-M3/5B datasheet, SMBJ7.0A-M3/5B pinout, SMBJ7.0A-M3/5B application, or SMBJ7.0A-M3/5B equivalent, key selection criteria include its 12.0 V clamping performance at 50 A, halogen-free RoHS-compliant M3 suffix, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on standard PCB pad layouts per JEDEC DO-214AA.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its low incremental surge resistance (typical <0.1 Ω) and sub-nanosecond response time ensure effective suppression of fast transients such as IEC 61000-4-2 ESD (±15 kV air, ±8 kV contact) and ISO 7637-2 load dump pulses.
The SMBJ7.0A-M3/5B is rated for 150 °C maximum junction temperature, has a thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, and meets J-STD-020 MSL Level 1 - enabling reflow soldering at peak temperatures up to 260 °C without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's nominal DC rail. |
| VBR @ IT = 10 mA | 7.78–8.60 V - Measured breakdown range confirming reliable turn-on margin above VWM; ensures stable clamping initiation. |
| VC @ IPPM = 50.0 A | 12.0 V - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs during 600 W transient events. |
| IPPM | 50.0 A - Peak pulse current capability under standardized 10/1000 µs waveform; supports robust protection against high-energy surges. |
| PPPM | 600 W - Peak pulse power rating; determines survivability against short-duration energy bursts like inductive switch-off spikes. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial environments with elevated ambient temps. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.130" footprint; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating and JESD 22-B102 solderability standards. Polarity indicated by cathode band on one end; anode and cathode terminals are axially oriented along the body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line (e.g., +12 V rail); conducts avalanche current during overvoltage events to shunt energy to ground. |
| Anode (unmarked end) | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop and defines reference potential for VWM and VC. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like ISO 7637-2 Pulse 1 (inductive load dump) without thermal runaway. |
| 12.0 V clamping voltage at 50 A | Keeps downstream logic-level devices (e.g., 5 V or 3.3 V MCUs) within safe absolute maximum ratings during surge events. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs while maintaining full electrical equivalence to E3 variants. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without pre-baking, reducing manufacturing complexity and cost. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt conditions, improving clamping precision and reducing stress on protected components. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 12 V supply inputs of BCM microcontrollers from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between fused battery rail and LDO input. Use Value: Limits transient overvoltage to ≤12.0 V during 50 A surges, preventing latch-up or gate oxide damage in downstream 5 V regulators and CAN transceivers. |
Use Scenario: Shields 24 V digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor mounted at connector interface before optocoupler input stage. Use Value: Maintains 7.0 V stand-off while clamping 10/1000 µs surges to 12.0 V, ensuring reliable opto-isolator triggering without false triggering or degradation. |
| Consumer Appliance Motor Drive Board | Telecom Power Supply Front-End |
Use Scenario: Guards MCU GPIO and gate-driver supply lines on BLDC motor control boards exposed to commutation noise. IC Role / Device Role / Timing Role: Localized TVS on 5 V/3.3 V rails adjacent to sensitive analog and digital ICs. Use Value: Responds in <1 ns to fast-edge switching noise, clamping spikes before they propagate into ADC reference or oscillator circuits. |
Use Scenario: Installed across primary-side DC bus of AC/DC adapters to absorb line-induced surges per IEC 61000-4-5 Level 3. IC Role / Device Role / Timing Role: Primary-stage overvoltage clamp on bulk capacitor terminals. Use Value: Absorbs up to 600 W of surge energy without failure, preserving hold-up capacitance integrity and preventing upstream rectifier overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A-E3/5B | Same electrical specs and SMB package; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable for commercial-grade applications where halogen-free requirement is not mandated. | Select when cost sensitivity outweighs halogen-free compliance; identical layout and thermal behavior. |
| SMAJ7.0A-M3 | Lower 400 W peak pulse power; SMA (DO-214AC) package with smaller 0.175" × 0.120" footprint and higher RθJA (140 °C/W). | Suitable only for lower-energy transients or space-constrained designs where 600 W headroom is unnecessary. | Choose only if board area is critical and surge threat level is limited to IEC 61000-4-2 ±8 kV; requires derating for same thermal performance. |
Compared with SMBJ7.0A-M3/5B, the E3 variant offers identical protection performance without halogen-free certification, while the SMAJ7.0A-M3 reduces board area at the expense of 33 % lower surge energy handling and reduced thermal margin - making SMBJ7.0A-M3/5B optimal for automotive and industrial applications demanding full 600 W capability and halogen-free compliance.
Availability
SMBJ7.0A-M3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, consumer appliance motor controllers, and telecom power supply front-ends requiring stable component supply with halogen-free and AEC-Q101-aligned manufacturing traceability.
Supply support for SMBJ7.0A-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 qualification.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where sustained surge immunity and long-term stability under thermal cycling are mandatory design requirements.
FAQ
What is the clamping voltage of SMBJ7.0A-M3/5B at its rated peak pulse current?
The SMBJ7.0A-M3/5B has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 50.0 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 5 V or 3.3 V logic interfaces downstream of the SMBJ7.0A-M3/5B.
Does SMBJ7.0A-M3/5B meet automotive qualification standards?
The SMBJ7.0A-M3/5B itself is a commercial-grade halogen-free part (M3 suffix) and is not AEC-Q101 qualified; however, it shares identical die and construction with the AEC-Q101-qualified variant SMBJ7.0AHM3_B/I. For automotive applications requiring formal qualification, the HM3-suffixed version must be specified - the SMBJ7.0A-M3/5B remains suitable for non-automotive industrial and consumer use cases where full AEC-Q101 testing is not mandated.
What is the meaning of the "/5B" suffix in SMBJ7.0A-M3/5B?
The "/5B" suffix in SMBJ7.0A-M3/5B indicates packaging in a 13-inch diameter plastic tape-and-reel format containing 3200 units per reel. This delivery mode supports high-volume SMT assembly lines using standard 13" feeder systems. The "M3" denotes halogen-free, RoHS-compliant construction, while "5B" is purely a packaging code - it does not affect electrical performance or reliability of the SMBJ7.0A-M3/5B device.
Can SMBJ7.0A-M3/5B be used in bidirectional protection applications?
No - SMBJ7.0A-M3/5B is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional transient suppression, Vishay specifies the CA-suffixed variant (e.g., SMBJ7.0CA). Using SMBJ7.0A-M3/5B in bidirectional signal paths would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always match polarity: SMBJ7.0A-M3/5B for DC rails with defined ground reference, SMBJ7.0CA for AC-coupled or floating lines.
What is the thermal resistance of SMBJ7.0A-M3/5B under standard mounting conditions?
The SMBJ7.0A-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 - as defined in the Vishay datasheet. This value assumes no additional heatsinking and is critical for calculating steady-state temperature rise under continuous power dissipation (PD = 5.0 W) or estimating thermal margin during repetitive surge events.
SMBJ7.0A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 50A
- 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)
SMBJ7.0A-M3/5B FAQ
1.How can I place an order for SMBJ7.0A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0A-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 SMBJ7.0A-M3/5B reliable?
The price and inventory of SMBJ7.0A-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 SMBJ7.0A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.0A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0A-M3/5B?
SMBJ7.0A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0A-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 SMBJ7.0A-M3/5B?
For technical support, including SMBJ7.0A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0A-M3/5B requirements.
6.How does Aetrix verify that SMBJ7.0A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0A-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 SMBJ7.0A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.0A-M3/5B?
All SMBJ7.0A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0A-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 SMBJ7.0A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.0A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0A-M3/5B Tags
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