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Vishay General Semiconductor - Diodes Division SMBJ64CA-E3/5B
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- Part No.:
- SMBJ64CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CA-E3/5B.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,097
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Product details
Overview
SMBJ64CA-E3/5B 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 power and signal lines. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 5.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ64CA-E3/5B datasheet, SMBJ64CA-E3/5B pinout, SMBJ64CA-E3/5B application, or SMBJ64CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.61), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling protection against ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 150 °C maximum junction temperature and exhibits a +0.105 %/°C temperature coefficient of VBR. Thermal resistance is 100 °C/W (junction-to-ambient, on recommended pad layout) and 20 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 103 V at 5.8 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 600 W - peak transient power handling capability under standardized surge waveform |
| IDR @ VWM | ≤1.0 µA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - enables use in high-temperature industrial and automotive-adjacent environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 5.59 mm max length |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | Enables clamping during positive or negative transients without external polarity orientation |
| Cathode | Current exit terminal in forward bias; functionally identical to anode for bidirectional operation | Eliminates need for orientation-aware PCB layout; supports AC-coupled or floating-line protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - protects AC lines, differential buses, and ungrounded sensors |
| 600 W peak pulse power | Handles 10/1000 µs surges up to 5.8 A without degradation - meets IEC 61000-4-5 Level 4 immunity requirements |
| Low clamping ratio | VC/VWM = 1.61 - minimizes overvoltage exposure to protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports standard lead-free assembly without baking or special handling |
| RoHS-compliant, halogen-free option | E3 suffix denotes RoHS-compliant commercial grade; M3 suffix adds halogen-free compliance |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: 24 V DC input rail in PLC I/O modules subjected to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±100 V transients within 1 ns. Use Value: Limits voltage seen by upstream DC-DC controller and downstream analog front-end to ≤103 V, preventing latch-up or gate oxide damage. |
Use Scenario: CAN FD or LIN bus lines in engine control units exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground suppression on differential signal pairs. Use Value: Maintains signal integrity below 103 V clamping while adding <1 pF junction capacitance - no data rate degradation. |
| Consumer Appliance Motor Drive Protection | Telecom PoE Port Protection |
|
Use Scenario: H-bridge gate driver supply rails in smart HVAC blower systems experiencing inductive kickback. IC Role / Device Role / Timing Role: Parallel-mounted across VDD and GND to absorb 600 W surges from brushed motor commutation. Use Value: Prevents reset or brownout of microcontroller supply by holding rail voltage above 5.0 V during 10 ms transients. |
Use Scenario: Data pair protection on IEEE 802.3af/at PoE injectors and splitters. IC Role / Device Role / Timing Role: Bidirectional suppression between tip/ring and shield to meet UL 60950-1 surge withstand requirements. Use Value: Survives repeated 10/1000 µs surges up to 600 W while maintaining <1 µA leakage at 64 V - avoids false PSE detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in circuit function; selected where halogen-free compliance is mandated | Choose when environmental compliance requires halogen-free materials without altering design or layout |
| SMAJ64CA-E3/A | Lower 400 W PPPM, 113 V VC at 4.4 A, SMA (DO-214AC) package - smaller footprint, lower surge capacity | Not suitable for 600 W surge environments; limited to space-constrained, lower-energy applications | Select only if board area is critical and surge threat level is ≤400 W - not a drop-in replacement |
Compared with SMBJ64CA-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the SMAJ64CA-E3/A trades 33% lower surge power and higher clamping for 30% smaller PCB area - requiring redesign if substituting.
Availability
SMBJ64CA-E3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, consumer appliance motor drives, and telecom PoE port protection requiring stable component supply and full traceability.
Supply support for SMBJ64CA-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 and application-specific performance.
The SMBJ series was engineered for robust, surface-mount transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where failure tolerance and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ64CA-E3/5B at its rated peak pulse current?
The SMBJ64CA-E3/5B has a maximum clamping voltage (VC) of 103 V at its specified peak pulse current (IPPM) of 5.8 A under a 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. The SMBJ64CA-E3/5B maintains this clamping performance across its operating temperature range and is validated with derating curves up to 150 °C junction temperature.
Is SMBJ64CA-E3/5B suitable for automotive applications?
The SMBJ64CA-E3/5B is a commercial-grade part (E3 suffix) and is not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ64CA-HE3_B/I variant, which carries AEC-Q101 qualification and is marked with HE3 suffix. The SMBJ64CA-E3/5B may be used in non-safety-critical automotive-adjacent systems (e.g., infotainment power rails) but lacks the stress testing and lot traceability required for engine bay or ADAS applications. Always verify qualification status via the full ordering code.
How does the bidirectional configuration of SMBJ64CA-E3/5B affect PCB layout?
The SMBJ64CA-E3/5B has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. This allows direct placement across AC-coupled lines, floating grounds, or differential pairs without concern for anode/cathode alignment. Unlike unidirectional TVS diodes, the SMBJ64CA-E3/5B avoids risk of incorrect installation and simplifies pick-and-place programming - especially valuable in high-mix manufacturing of sensor interface boards.
What is the thermal resistance of SMBJ64CA-E3/5B, and how does it impact surge handling?
The SMBJ64CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. This value directly limits sustained power dissipation but has minimal effect on single-pulse surge capability (e.g., 10/1000 µs), which is governed by junction thermal mass. However, for repetitive surges, RθJA determines allowable duty cycle - the SMBJ64CA-E3/5B is rated for ≤0.01% duty cycle at 25 °C ambient per datasheet Fig. 2.
Can SMBJ64CA-E3/5B replace a unidirectional TVS like SMBJ64A-E3/5B in an existing design?
No - the SMBJ64CA-E3/5B is bidirectional and cannot substitute for the unidirectional SMBJ64A-E3/5B in circuits relying on DC blocking or polarity-sensitive clamping (e.g., DC power input with cathode-to-rail configuration). While both share identical VWM, VBR, and VC values, the unidirectional part conducts only in reverse bias and blocks forward current, whereas the CA version clamps in both directions. Substitution would require verifying that bidirectional conduction does not disrupt bias networks or cause unintended current paths in the SMBJ64CA-E3/5B implementation.
SMBJ64CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SMBJ64CA-E3/5B FAQ
1.How can I place an order for SMBJ64CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CA-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 SMBJ64CA-E3/5B reliable?
The price and inventory of SMBJ64CA-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 SMBJ64CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ64CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CA-E3/5B?
SMBJ64CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CA-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 SMBJ64CA-E3/5B?
For technical support, including SMBJ64CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ64CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ64CA-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 SMBJ64CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ64CA-E3/5B?
All SMBJ64CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CA-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 SMBJ64CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ64CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CA-E3/5B Tags
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