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Vishay General Semiconductor - Diodes Division SMBJ6.5CAHE3_B/I
- Part No.:
- SMBJ6.5CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5CAHE3_B/I.pdf
- Description:
- 600W,6.5V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,151
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Product details
Overview
SMBJ6.5CAHE3_B/I 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 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤11.2 V at 53.6 A peak surge current - deployed in sensor interface protection and MOSFET gate drive circuits.
For engineers reviewing the SMBJ6.5CAHE3_B/I datasheet, SMBJ6.5CAHE3_B/I pinout, SMBJ6.5CAHE3_B/I application, or SMBJ6.5CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 11.2 V max clamping voltage at rated IPPM, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling robust ESD and surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the 10/1000 µs waveform rating reflects standardized lightning-surge immunity testing per IEC 61000-4-5.
The SMBJ6.5CAHE3_B/I is AEC-Q101 qualified (automotive-grade), RoHS-compliant, and rated for TJ = –55 °C to +150 °C operation. Its MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility support high-reliability industrial and automotive PCB assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR min/max | 7.22 V / 7.98 V at IT = 10 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | ≤11.2 V at 53.6 A - clamping voltage under 600 W 10/1000 µs surge; determines protected circuit's maximum overvoltage exposure. |
| PPPM | 600 W - peak transient power handling capacity; validates suitability for IEC 61000-4-5 Level 3/4 surge events. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - enables deployment in under-hood automotive ECUs and industrial motor drives with high ambient temperatures. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One end of symmetrical PN junction; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Terminal 2 | Cathode (bidirectional) | Other end of symmetrical PN junction; connects to same line (e.g., CAN_H or RS-485 A), completing bidirectional clamp path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., USB D+, D−, RS-485) without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules, ADAS sensor interfaces, and infotainment power rails. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 53.6 A - meets IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs; critical for protecting 3.3 V or 5 V logic inputs with tight VIH/VIL margins. |
| MSL Level 1, 260 °C reflow | Supports zero-preconditioning lead-free SMT assembly, reducing manufacturing complexity and cost in high-volume production. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output pins of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤11.2 V, preventing ADC saturation and latch-up in 5 V rail systems. |
Use Scenario: Guarding RS-485 transceiver data lines (A/B) against EFT bursts and lightning-induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Line-to-line TVS connected differentially across A and B bus lines. Use Value: Maintains signal integrity during 600 W transients without adding capacitance that degrades 10 Mbps data rates. |
| Consumer USB Port Protection | Power Supply Input Stage |
|
Use Scenario: Safeguarding USB 2.0 D+ and D− lines in portable chargers and docking stations against human-body-model ESD (±15 kV). IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at USB connector, shunting ESD to ground. Use Value: Sub-1 ns response time clamps ESD events before transceiver damage occurs; <1.0 µA leakage avoids battery drain. |
Use Scenario: Suppressing switching noise and line surges on 12 V DC input rails of embedded power supplies in networking gear. IC Role / Device Role / Timing Role: Parallel-connected TVS between VIN and GND, absorbing inductive kickback from upstream converters. Use Value: 6.5 V VWM allows use on 5 V–12 V rails; 11.2 V VC prevents overvoltage shutdown of downstream DC/DC controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade (non-AEC-Q101). | Lacks automotive qualification; suitable for consumer/industrial designs not requiring AEC-Q101 traceability. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SAC5.0B | Lower PPPM (400 W), higher VWM (5.0 V), same SMB package; unidirectional only. | Requires dual devices for bidirectional protection; less effective for differential line clamping. | Choose only if unidirectional protection suffices and 600 W surge margin is not required. |
Compared with SMBJ6.5CAHE3_B/I, the SMBJ6.5CA-E3/52 offers identical clamping performance without automotive qualification, while SAC5.0B trades peak power and bidirectionality for lower cost - making SMBJ6.5CAHE3_B/I the optimal choice where AEC-Q101 compliance and full 600 W bidirectional surge handling are mandatory.
Availability
SMBJ6.5CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, and consumer USB port hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ6.5CAHE3_B/I 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 optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against ESD, EFT, and lightning surges is non-negotiable.
FAQ
What does the "HE3" suffix indicate in SMBJ6.5CAHE3_B/I?
The "HE3" suffix in SMBJ6.5CAHE3_B/I denotes RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive-grade reliability standards including temperature cycling, humidity testing, and surge endurance - distinct from commercial-grade "E3" variants. This makes SMBJ6.5CAHE3_B/I suitable for under-hood and ADAS applications where qualification traceability is required.
Is SMBJ6.5CAHE3_B/I unidirectional or bidirectional?
SMBJ6.5CAHE3_B/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number and documentation stating "Electrical characteristics apply in both directions." Unlike unidirectional variants (e.g., SMBJ6.5A), it has no cathode band marking and provides symmetrical clamping for AC signals, differential buses, or polarity-agnostic protection schemes.
What is the maximum clamping voltage for SMBJ6.5CAHE3_B/I at rated surge current?
The maximum clamping voltage (VC) for SMBJ6.5CAHE3_B/I is 11.2 V at 53.6 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value is specified in the Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during a full-rated 600 W transient event.
Can SMBJ6.5CAHE3_B/I be used in place of SMBJ6.5A in a design?
No - SMBJ6.5CAHE3_B/I and SMBJ6.5A are functionally distinct: the former is bidirectional with symmetrical clamping, while the latter is unidirectional and requires correct polarity orientation. Substituting SMBJ6.5CAHE3_B/I for SMBJ6.5A eliminates polarity constraints but alters circuit behavior in DC-biased applications; redesign verification is required.
What PCB pad layout is recommended for optimal thermal performance of SMBJ6.5CAHE3_B/I?
Vishay specifies mounting SMBJ6.5CAHE3_B/I on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the rated RθJA of 100 °C/W. Reducing pad area increases thermal resistance and requires derating of peak pulse power above 25 °C, per Figure 2 in the datasheet. The SMBJ6.5CAHE3_B/I datasheet provides exact dimensional tolerances for solder mask and copper clearance.
SMBJ6.5CAHE3_B/I 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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ6.5CAHE3_B/I FAQ
1.How can I place an order for SMBJ6.5CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5CAHE3_B/I 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 SMBJ6.5CAHE3_B/I reliable?
The price and inventory of SMBJ6.5CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ6.5CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5CAHE3_B/I?
SMBJ6.5CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5CAHE3_B/I 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 SMBJ6.5CAHE3_B/I?
For technical support, including SMBJ6.5CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ6.5CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5CAHE3_B/I 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 SMBJ6.5CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ6.5CAHE3_B/I?
All SMBJ6.5CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5CAHE3_B/I, 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 SMBJ6.5CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ6.5CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5CAHE3_B/I Tags
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Diodes Incorporated
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