My Inquiry
My Account
Semtech Corporation SMBJ6.5CA
- Part No.:
- SMBJ6.5CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5CA.pdf
- Description:
- 1-LINE 6.5V 53.6A TVS DO-214AA(S
- Quantity:
- Payment:
- Shipping:
Inventory:7,792
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ6.5CA from Littelfuse is a unidirectional transient voltage suppression (TVS) diode designed for primary overvoltage protection of DC power rails and low-speed signal lines. It features a 6.5V working voltage (VRWM), 7.22V minimum breakdown voltage (VBR), 10.5V maximum clamping voltage at 10.3A peak pulse current (VC), 600W peak pulse power rating (8/20μs), and DO-214AA (SMC) surface-mount package. It is used in industrial power supplies, automotive body electronics, and embedded controller I/O protection.
For engineers reviewing the SMBJ6.5CA datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 8/20μs surges, thermal derating behavior across –65°C to +150°C, unidirectional polarity suitability for grounded-rail systems, and compatibility with automated SMT assembly using standard reflow profiles for DO-214AA packages.
Technical Context
The SMBJ6.5CA operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds its VBR threshold, diverting surge current away from protected circuitry. Its unidirectional configuration enables use on positive-rail–grounded systems without forward conduction during normal operation.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) immunity standards. The device exhibits stable clamping up to 10.3A (8/20μs), with VC rising only marginally from 9.2V at 1A to 10.5V at full rated IPP - confirming low dynamic impedance and predictable energy handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 6.5 V - Maximum continuous DC or RMS voltage the device blocks without leakage exceeding 100 µA. |
| Breakdown Voltage (VBR) | 7.22–8.0 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering before protected ICs exceed absolute maximum ratings. |
| Clamping Voltage (VC) | 10.5 V at 10.3 A (8/20 µs) - Peak voltage seen by downstream circuit during worst-case surge; stays ≤10.5 V across full operating temperature range. |
| Peak Pulse Power (PPPM) | 600 W (8/20 µs) - Energy-handling capacity enabling compliance with Level 4 IEC 61000-4-5 (4 kV line-to-ground) in typical PCB layouts. |
| Package | DO-214AA (SMC) - Standardized 7.11 × 6.22 mm surface-mount outline with gull-wing leads; supports >2.5 mm creepage/clearance and automated optical inspection. |
| Operating Temperature | –65°C to +150°C - Full-rated performance across automotive under-hood and industrial control environments without derating. |
Pinout & Package
DO-214AA (SMC) package: molded plastic case with two coplanar gull-wing terminals; cathode indicated by band marking on body end. No internal pin numbering - anode and cathode are defined by physical orientation and marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side connection point | Connected to ground or return path; carries full surge current to reference plane with minimal trace inductance impact. |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., 5V rail, CAN_H); clamps transient by conducting to anode when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping ratio (VC/VRWM) | 1.62 - Enables tighter voltage margin between protected IC's max input and clamping level, reducing risk of latch-up or damage. |
| Fast response time | <1 ps - Avalanche initiation occurs within picoseconds of overvoltage detection, limiting let-through energy before protection engages. |
| High surge current capability | 10.3 A (8/20 µs) - Supports repeated exposure to IEC 61000-4-5 Line-Ground surges up to 4 kV without degradation. |
| RoHS-compliant & halogen-free | Meets IPC-J-STD-609 Class 1 - Ensures compatibility with lead-free reflow processes and environmental compliance for global OEM shipments. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module I/O |
|---|---|
Use Scenario: 12 V DC input stage of programmable logic controllers (PLCs) exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input to prevent MOSFET gate oxide rupture and regulator latch-up. Use Value: Limits transient voltage to ≤10.5 V during 10.3 A surges, maintaining safe bias on 15 V-rated input capacitors and enabling single-stage protection without series impedance. |
Use Scenario: LIN bus transceiver power supply line in door module ECUs subjected to battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt protector on VCC rail; blocks reverse polarity while clamping positive spikes above 6.5 V. Use Value: Withstands –14 V reverse bias indefinitely and clamps +20 V spikes to 10.5 V, preserving transceiver functionality without external polarity protection diodes. |
| USB Host Port VBUS Protection | Embedded Microcontroller Reset Line Protection |
Use Scenario: VBUS line (5 V nominal) in USB 2.0 host ports encountering ESD events and hot-plug inrush overshoot. IC Role / Device Role / Timing Role: Low-capacitance (<150 pF) TVS placed directly at connector to suppress ±15 kV contact ESD per IEC 61000-4-2. Use Value: Clamps ESD-induced peaks to ≤10.5 V within <1 ps, preventing latch-up in USB PHY and eliminating need for RC filtering that degrades signal integrity. |
Use Scenario: Active-low reset input (nRST) of ARM Cortex-M microcontrollers in medical sensors, where ESD on board edge connectors can cause spurious resets. IC Role / Device Role / Timing Role: Signal-line TVS with 6.5 V standoff, ensuring normal reset assertion at 0 V remains unaffected while blocking >7.2 V transients. Use Value: Leakage <1 µA at 6.5 V preserves weak-pull-up integrity; clamping at 10.5 V prevents false release of reset state during ±8 kV ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0A | Lower VRWM (6.0 V), slightly lower VBR (6.67–7.37 V), identical package and clamping (10.0 V @ 10.3 A). | Better suited for 5 V systems with tighter margin below 5.5 V IC absolute max ratings. | Select SMBJ6.0A when protecting 5 V rails where 6.5 V VRWM risks leakage or false triggering near nominal voltage. |
| SMBJ7.0A | Higher VRWM (7.0 V), higher VBR (7.78–8.6 V), same clamping (11.0 V @ 10.3 A), same package. | Preferred for 6–7 V systems requiring higher standoff to avoid leakage at elevated ambient temperatures. | Choose SMBJ7.0A for 6.5 V or 7 V auxiliary rails where 6.5 V VRWM causes excessive leakage above 85°C. |
Compared with SMBJ6.0A and SMBJ7.0A, the SMBJ6.5CA offers optimal balance for 5 V–6 V systems: sufficient margin above 5.5 V logic rails while minimizing leakage at high temperature, and lower clamping than SMBJ7.0A for improved system robustness.
Availability
SMBJ6.5CA is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control module I/O, USB host port VBUS protection, and embedded microcontroller reset line protection requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for SMBJ6.5CA 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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, polymeric PTCs, and gas discharge tubes for industrial, automotive, and consumer applications.
The SMBJ series was developed specifically for high-energy transient suppression in compact SMT formats, targeting design-in reliability for 5–40 V DC power and signal lines in harsh electromagnetic environments.
FAQ
What is the maximum clamping voltage of SMBJ6.5CA under IEC 61000-4-5 surge conditions?
The SMBJ6.5CA has a maximum clamping voltage (VC) of 10.5 V when subjected to a 10.3 A peak pulse current with an 8/20 μs waveform - the standard test condition for IEC 61000-4-5 Level 4 (4 kV line-to-ground). This value is guaranteed across the full operating temperature range (–65°C to +150°C), making SMBJ6.5CA suitable for automotive and industrial applications where thermal stability is critical.
Is SMBJ6.5CA suitable for bidirectional signal line protection?
No, SMBJ6.5CA is a unidirectional TVS diode and is not suitable for bidirectional signal lines such as RS-485 or CAN. It conducts only in reverse breakdown (cathode-to-anode) and blocks forward current. For bidirectional protection, a symmetric device like SMBJ6.5CA's counterpart SMBJ6.5C (the 'C' suffix denotes bidirectional) must be used - SMBJ6.5CA's 'A' suffix explicitly indicates unidirectional polarity.
How does SMBJ6.5CA compare to polymer-based TVS devices in surge response time?
SMBJ6.5CA uses silicon avalanche junction technology with sub-nanosecond response time (<1 ps), significantly faster than polymer-based TVS devices, which typically respond in 1–10 ns. This speed advantage ensures minimal let-through energy during fast-rising ESD events (e.g., IEC 61000-4-2), making SMBJ6.5CA preferred for protecting sensitive analog inputs and high-speed digital interfaces where timing margins are tight.
Can SMBJ6.5CA be used in parallel to increase surge current handling?
No - SMBJ6.5CA should not be paralleled without external balancing resistors. Due to manufacturing tolerances in VBR (7.22–8.0 V), uneven current sharing will occur during surges, causing one device to absorb most of the energy and potentially fail prematurely. For higher current requirements, select a higher-rated part (e.g., 1.5KE6.8A) or verify matched-bin devices with <0.1 V VBR spread under surge conditions.
What is the recommended PCB layout practice for SMBJ6.5CA to maintain specified clamping performance?
To preserve SMBJ6.5CA's 10.5 V clamping specification, place it within 5 mm of the protected connector with short, wide traces (≥1 mm width) to minimize parasitic inductance. Connect the cathode directly to the protected line and the anode to a low-impedance ground plane using ≥2 thermal vias. Avoid routing other signals near the TVS path, and ensure no copper pours beneath the device body to prevent capacitance-induced delay or coupling.
SMBJ6.5CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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):
- 56A
- 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 (SMB)
SMBJ6.5CA FAQ
1.How can I place an order for SMBJ6.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5CA 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 SMBJ6.5CA reliable?
The price and inventory of SMBJ6.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5CA is usually 5 days.
3.What payment methods are accepted for SMBJ6.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5CA?
SMBJ6.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5CA 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 SMBJ6.5CA?
For technical support, including SMBJ6.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5CA requirements.
6.How does Aetrix verify that SMBJ6.5CA is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5CA 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 SMBJ6.5CA meets industry standards.
7.What is the process for return or replacement of SMBJ6.5CA?
All SMBJ6.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5CA, 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 SMBJ6.5CA part is unused and in its original packaging.
Return procedure for SMBJ6.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
