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Vishay General Semiconductor - Diodes Division SMBJ6.5A-M3/5B
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- Part No.:
- SMBJ6.5A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5A-M3/5B.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
SMBJ6.5A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage (VC) at 53.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive body electronics.
For engineers reviewing the SMBJ6.5A-M3/5B datasheet, SMBJ6.5A-M3/5B pinout, SMBJ6.5A-M3/5B application, or SMBJ6.5A-M3/5B equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under surge conditions, and halogen-free RoHS-compliant sourcing status per Vishay's M3 suffix designation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR threshold. Its low incremental surge resistance (typical <0.2 Ω) ensures minimal voltage overshoot during fast transients, while the glass-passivated junction enables stable leakage (<500 µA at VWM) and repeatable breakdown characteristics across temperature.
Thermal design relies on RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting operation up to +150 °C junction temperature. The device meets J-STD-020 MSL Level 1 and withstands 100 A non-repetitive forward surge (8.3 ms half-sine), making it suitable for high-energy ESD and load-dump events in 12 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin above nominal 5 V or 6 V rail. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensures reliable triggering without premature clamping. |
| VC @ IPPM | 11.2 V at 53.6 A - Clamped voltage during 600 W 10/1000 µs surge; defines worst-case overvoltage seen by protected IC. |
| PPPM | 600 W - Peak pulse power handling capability; validated per IEC 61000-4-5 Level 4 surge immunity requirements. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports automotive load-dump protection per ISO 7637-2. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line (e.g., 6 V supply rail); voltage referenced to anode during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge test Level 4 (4 kV line-to-ground) on 12 V systems. |
| 11.2 V clamping voltage at 53.6 A | Limits downstream IC stress to <12 V during worst-case surge - critical for 5 V logic interface protection. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 Annex II updates. |
| MSL Level 1, 260 °C reflow capable | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking. |
| Low leakage (<500 µA at 6.5 V) | Minimizes standby power loss in battery-powered sensor nodes and avoids false triggering in high-impedance circuits. |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Sensor Interface |
|---|---|
|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load-dump surges and inductive switching spikes in door module PCBs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping transients within 1 ns response time. Use Value: Maintains VC ≤ 11.2 V during 100 A load-dump event, preventing latch-up or gate oxide damage in protected ASICs. |
Use Scenario: Shields RS-485 transceiver data lines (A/B) against ESD and cable discharge events in factory automation fieldbus nodes. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on differential pair, referenced to local ground with low-inductance layout. Use Value: Limits transient-induced common-mode voltage excursion to <12 V, preserving signal integrity and receiver input tolerance. |
| Consumer Power Adapter Output Rail | Medical Patient Monitor Front-End |
|
Use Scenario: Guards 5 V/6 V DC output of wall adapters against lightning-induced surges entering via AC mains coupling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side output, upstream of LDO regulators and USB ports. Use Value: Absorbs 600 W surge energy without degradation, ensuring downstream USB-PD controller remains within absolute maximum ratings. |
Use Scenario: Safeguards analog front-end amplifiers and ADC inputs from electrostatic discharge during patient cable connection/disconnection. IC Role / Device Role / Timing Role: Low-leakage TVS on signal path to precision instrumentation amplifier, minimizing offset drift. Use Value: Delivers <500 µA reverse leakage at 6.5 V, avoiding measurement error in µV-level biopotential signal chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A-E3/5B | Same electrical specs, but RoHS-compliant with brominated flame retardant (non-halogen-free); JEDEC-standard matte tin plating. | Approved for commercial-grade industrial equipment where halogen-free requirement is not mandated. | Select when cost-sensitive designs prioritize broad distributor availability over halogen-free compliance. |
| SMBJ6.5CA-M3/5B | Bidirectional variant: symmetric VBR = 7.22–7.98 V, same VC = 11.2 V, but supports AC-coupled or floating signal lines. | Required for protecting bidirectional buses (e.g., CAN FD, USB D+/D−) or transformer-coupled interfaces. | Choose only when circuit topology demands symmetrical clamping - not a drop-in replacement for unidirectional use cases. |
Compared with SMBJ6.5A-M3/5B, the E3 variant offers identical surge performance at lower cost but lacks halogen-free certification, while the 6.5CA variant enables AC signal protection but requires layout review for polarity independence - neither is pin-compatible without functional reassessment.
Availability
SMBJ6.5A-M3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter outputs, and medical front-end protection requiring stable component supply and halogen-free compliance.
Supply support for SMBJ6.5A-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 AEC-Q qualification.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and computing applications - engineered for rapid response, low clamping, and robust thermal performance in compact SMB packages.
FAQ
What is the maximum clamping voltage of SMBJ6.5A-M3/5B under a 600 W surge?
The SMBJ6.5A-M3/5B exhibits a maximum clamping voltage (VC) of 11.2 V when subjected to its rated 600 W peak pulse power with a 10/1000 µs waveform. This value is measured at 53.6 A peak pulse current and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does SMBJ6.5A-M3/5B meet automotive qualification standards?
The SMBJ6.5A-M3/5B itself is a commercial-grade part (M3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ6.5A-HM3_X variant (e.g., SMBJ6.5A-HM3_B) that is AEC-Q101 qualified for automotive use. For non-automotive industrial or consumer applications, SMBJ6.5A-M3/5B provides full electrical performance with halogen-free compliance.
How does the M3 suffix differ from E3 in SMBJ6.5A-M3/5B?
The M3 suffix in SMBJ6.5A-M3/5B denotes halogen-free, RoHS-compliant construction using bromine-free flame retardants in the molding compound, whereas E3 uses standard RoHS-compliant materials that may contain halogens. Both meet JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1, but only M3 satisfies strict halogen-free mandates such as IEC 61249-2-21.
Can SMBJ6.5A-M3/5B be used for bidirectional signal protection?
No - SMBJ6.5A-M3/5B is a unidirectional TVS diode, with polarity marked by a cathode band. For bidirectional protection (e.g., on AC-coupled or floating lines), the SMBJ6.5CA-M3/5B variant must be used. Substituting the unidirectional SMBJ6.5A-M3/5B in a bidirectional configuration risks catastrophic failure due to forward conduction during negative transients.
What is the thermal resistance from junction to ambient for SMBJ6.5A-M3/5B?
The SMBJ6.5A-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 and is essential for calculating steady-state power dissipation limits and transient thermal rise during repetitive surge events.
SMBJ6.5A-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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 53.6A
- 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)
SMBJ6.5A-M3/5B FAQ
1.How can I place an order for SMBJ6.5A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5A-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 SMBJ6.5A-M3/5B reliable?
The price and inventory of SMBJ6.5A-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 SMBJ6.5A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ6.5A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5A-M3/5B?
SMBJ6.5A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5A-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 SMBJ6.5A-M3/5B?
For technical support, including SMBJ6.5A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5A-M3/5B requirements.
6.How does Aetrix verify that SMBJ6.5A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5A-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 SMBJ6.5A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ6.5A-M3/5B?
All SMBJ6.5A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5A-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 SMBJ6.5A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ6.5A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5A-M3/5B Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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