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Vishay General Semiconductor - Diodes Division SMBJ6.5C-E3/5B
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- Part No.:
- SMBJ6.5C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5C-E3/5B.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
SMBJ6.5C-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 - used to protect MOSFET gates, microcontroller I/O, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ6.5C-E3/5B datasheet, SMBJ6.5C-E3/5B pinout, SMBJ6.5C-E3/5B application, or SMBJ6.5C-E3/5B equivalent, key selection criteria include unidirectional polarity, 11.2 V clamping performance at rated surge current, RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device in series with sensitive downstream circuitry. Its glass-passivated junction enables sub-nanosecond response to transients, while low incremental surge resistance ensures minimal overshoot during 600 W surge events. The device is rated for repetitive 0.01% duty cycle surges and derates linearly above 25 °C ambient per Fig. 2 of the datasheet.
Designed for unidirectional operation, SMBJ6.5C-E3/5B exhibits forward conduction only when anode-to-cathode voltage exceeds ~3.5 V (max at 50 A), with cathode identified by the band marking. Thermal resistance is 100 °C/W junction-to-ambient (on recommended pad layout) and 20 °C/W junction-to-lead, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 6.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 7.22–7.98 V at 10 mA - Confirmed minimum/maximum breakdown range defining turn-on consistency across production lots. |
| VC (Clamping Voltage) | 11.2 V at 53.6 A (10/1000 µs) - Measured peak voltage seen by protected IC during worst-case surge; determines safe margin for downstream logic. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized 10/1000 µs surge waveform without failure. |
| IPPM (Peak Pulse Current) | 53.6 A - Maximum non-repetitive surge current the device can safely divert while maintaining VC ≤ 11.2 V. |
| TJmax | 150 °C - Absolute maximum junction temperature; defines thermal design limits for PCB copper area and airflow. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on minimum recommended 0.2" × 0.2" copper pads; critical for power derating calculations. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by molded band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line (e.g., connected to power rail or signal source) | Current flows into anode during forward surge; must be placed upstream of protected load. |
| Cathode | Output side tied to ground or return path | Marked by band; provides low-impedance shunt path to ground when VAK ≥ VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in compact SMB footprint. |
| 11.2 V clamping at 53.6 A | Provides <1.8× overvoltage margin relative to 6.5 V stand-off, ensuring logic-level ICs remain within absolute maximum ratings during surge. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk in high-volume SMT lines. |
| Glass passivated junction | Delivers stable VBR tolerance and low leakage (<1 µA at 6.5 V) over 10+ year field life in humid industrial environments. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020; suitable for consumer, computing, and industrial applications without automotive qualification overhead. |
Applications
| Industrial Motor Drive Control | USB Port ESD Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensing circuits from switching-induced transients in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between half-bridge MOSFET gate and driver IC output to clamp Miller-induced spikes. Use Value: Limits gate-source voltage to ≤11.2 V during 53.6 A surge, preventing driver latch-up or MOSFET avalanche failure. |
Use Scenario: Safeguarding USB 2.0 data lines (D+/D−) and VBUS against contact ESD per IEC 61000-4-2 ±8 kV. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at USB connector to shunt ESD current before reaching PHY transceiver. Use Value: Sub-1 ns response clamps transients before USB eye diagram distortion occurs; 11.2 V clamping preserves PHY's 3.3 V I/O tolerance. |
| Programmable Logic Controller (PLC) Input Module | Automotive Body Control Module (BCM) Power Rail |
|
Use Scenario: Shielding 24 V digital input channels from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: TVS installed across input terminal and common rail to absorb >600 W transient energy without degradation. Use Value: Withstands repeated 10/1000 µs surges at 0.01% duty cycle; maintains <1 µA leakage at 24 V nominal to avoid false triggering. |
Use Scenario: Suppressing load-dump transients on 12 V supply lines feeding BCM microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary clamping device on main power entry, coordinated with upstream fuse and secondary TVS for staged protection. Use Value: Clamps 12 V rail to ≤11.2 V during fast-rising transients, preserving MCU reset circuitry and avoiding brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A-E3/5B | Same VWM, VBR, VC, and package; identical electrical specs per Vishay datasheet Table 1. | No functional difference; "A" suffix denotes same unidirectional variant as "C" in this family - both refer to unidirectional SMBJ6.5 devices. | Select based on internal ordering code preference; no performance or layout impact. |
| SMAJ6.5A-E3/5B | Lower 400 W PPPM, higher 12.3 V VC at 35.3 A, SMA (DO-214AC) package with smaller 0.160" × 0.120" footprint. | Reduced surge handling margin; suitable only where space constraints outweigh need for 600 W rating. | Choose SMAJ6.5A-E3/5B only if board area is critical and surge threat level is ≤400 W; otherwise SMBJ6.5C-E3/5B provides superior protection headroom. |
Compared with SMBJ6.5A-E3/5B (identical spec), SMBJ6.5C-E3/5B offers no technical distinction; versus SMAJ6.5A-E3/5B, it delivers +50% peak power handling and 1.1 V lower clamping in a slightly larger but thermally superior SMB package - making it preferred for industrial-grade surge resilience.
Availability
SMBJ6.5C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, USB interface protection, PLC input modules, and automotive body control systems requiring stable component supply and long-term obsolescence management.
Supply support for SMBJ6.5C-E3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and high-power handling.
The SMBJ series was developed specifically for surface-mount transient suppression in space-constrained, high-surge industrial and automotive applications - balancing 600 W power rating, low clamping, and MSL Level 1 process compatibility.
FAQ
What is the polarity configuration of SMBJ6.5C-E3/5B?
SMBJ6.5C-E3/5B is a unidirectional TVS diode, meaning it conducts only when the anode is positive relative to the cathode. The cathode is marked by a visible band on the SMB (DO-214AA) package body. This polarity must be observed during PCB layout to ensure proper clamping of positive-going transients on power or signal lines - incorrect orientation renders SMBJ6.5C-E3/5B ineffective for reverse-polarity surge suppression.
Does SMBJ6.5C-E3/5B meet automotive qualification standards?
SMBJ6.5C-E3/5B carries the "E3" suffix, indicating RoHS-compliant commercial grade - not AEC-Q101 qualified. For automotive use, Vishay specifies the HE3 or HM3 suffix variants (e.g., SMBJ6.5AHE3_B). While SMBJ6.5C-E3/5B shares identical electrical specs, its qualification status is limited to industrial and consumer applications; SMBJ6.5C-E3/5B should not be deployed in safety-critical vehicle subsystems without additional validation.
What is the maximum clamping voltage of SMBJ6.5C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ6.5C-E3/5B is 11.2 V, measured at 53.6 A peak pulse current using the standardized 10/1000 µs waveform. This value represents the highest voltage that will appear across the device terminals during a full-rated 600 W surge event - a critical parameter for ensuring protected ICs remain within their absolute maximum voltage ratings. SMBJ6.5C-E3/5B achieves this clamping performance with low incremental resistance, minimizing overshoot.
Can SMBJ6.5C-E3/5B be used in bidirectional signal line protection?
No - SMBJ6.5C-E3/5B is unidirectional and unsuitable for bidirectional signal lines such as RS-485 or CAN bus without external circuitry. Bidirectional protection requires the "CA" suffix variant (e.g., SMBJ6.5CA), which has symmetrical breakdown in both directions. Using SMBJ6.5C-E3/5B on a bidirectional line would allow conduction only in one polarity, leaving the line vulnerable to negative transients. Always match SMBJ6.5C-E3/5B polarity to the DC bias direction of the protected node.
What is the thermal resistance of SMBJ6.5C-E3/5B and how does it affect layout?
SMBJ6.5C-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; reducing copper area increases RθJA, risking thermal runaway during repetitive surges. Layout must allocate sufficient copper pour to maintain junction temperature ≤150 °C - especially important when SMBJ6.5C-E3/5B handles multiple surges per minute in industrial automation systems.
SMBJ6.5C-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 48.8A
- 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)
SMBJ6.5C-E3/5B FAQ
1.How can I place an order for SMBJ6.5C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5C-E3/5B 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 SMBJ6.5C-E3/5B reliable?
The price and inventory of SMBJ6.5C-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ6.5C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5C-E3/5B?
SMBJ6.5C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5C-E3/5B 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 SMBJ6.5C-E3/5B?
For technical support, including SMBJ6.5C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5C-E3/5B requirements.
6.How does Aetrix verify that SMBJ6.5C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5C-E3/5B 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 SMBJ6.5C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ6.5C-E3/5B?
All SMBJ6.5C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5C-E3/5B, 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 SMBJ6.5C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ6.5C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5C-E3/5B Tags
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