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Vishay General Semiconductor - Diodes Division SMBJ64A-M3/5B
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- Part No.:
- SMBJ64A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64A-M3/5B.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,515
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Product details
Overview
SMBJ64A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. 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.
For engineers reviewing the SMBJ64A-M3/5B datasheet, SMBJ64A-M3/5B pinout, SMBJ64A-M3/5B application, or SMBJ64A-M3/5B equivalent, key selection criteria include clamping performance under 5.8 A surge, unidirectional polarity for DC rail protection, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 64 V, it avalanches into low-impedance conduction to divert surge energy away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
The device is rated for repetitive 10/1000 µs surges at 0.01% duty cycle, supports 100 A non-repetitive forward surge (IFSM), and maintains operation across -55 °C to +150 °C junction temperature range. Its SMB package enables automated placement and meets J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR min/max | 71.1 V / 78.6 V at IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal system voltage. |
| VC @ IPPM | 103 V at 5.8 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected load. |
| PPPM | 600 W - Peak pulse power handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IPPM | 5.8 A - Peak pulse current capability with 10/1000 µs waveform; sets minimum surge current diversion threshold. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or industrial enclosures. |
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 band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes shunt path during overvoltage event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 48 V rail); avalanche conduction initiates here when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Validated for IEC 61000-4-5 4th edition surge immunity testing on 48 V DC lines. |
| 103 V clamping at 5.8 A | Limits transient overvoltage to ≤103 V during worst-case 10/1000 µs surge, protecting 75 V-rated MOSFETs and controllers. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for industrial and automotive end equipment without compromising surge performance. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against back-EMF spikes from brushed DC motors and solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between motor driver output and ground to clamp inductive kickback. Use Value: Limits transient voltage to 103 V, preventing gate oxide damage to 75 V-rated N-channel MOSFETs in half-bridge configurations. |
Use Scenario: Surge suppression on LIN bus power supply lines and sensor VCC rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across 12 V/24 V supply inputs to absorb ISO 7637-2 Pulse 1, 2a, and 5a transients. Use Value: Withstands 100 A single-half-sine surge (IFSM) and clamps to 103 V, maintaining microcontroller reset integrity during battery disconnection events. |
| Telecom Power Supplies | Industrial IoT Sensor Nodes |
|
Use Scenario: Input-stage protection for 48 V PoE-powered equipment subjected to lightning-induced common-mode surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary shunt limiter on DC input rail upstream of DC/DC converters and PMICs. Use Value: 600 W peak power rating and 103 V clamping ensure compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) without derating. |
Use Scenario: ESD and EFT protection for analog sensor signal conditioning circuits powered from local 3.3 V or 5 V LDOs. IC Role / Device Role / Timing Role: Secondary TVS on regulated supply rail to prevent latch-up in precision ADCs and op-amps during field maintenance. Use Value: Low leakage (<1 µA at 64 V) avoids loading error in high-impedance sensor bias networks while providing <1 ns response to 8 kV HBM ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Acceptable where halogen-free requirement is not mandated (e.g., commercial telecom, non-automotive industrial). | Select SMBJ64A-E3/5B for cost-sensitive designs without halogen-free certification needs. |
| SMBJ64CA-M3/5B | Bidirectional variant; symmetric VBR = 71.1–78.6 V, same VC = 103 V, but no polarity marking. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD), not suitable for DC rail protection. | Choose SMBJ64CA-M3/5B only when protecting balanced differential buses or AC-powered circuits. |
Compared with SMBJ64A-M3/5B, the E3 variant trades halogen-free compliance for lower cost in commercial applications, while the CA variant changes polarity behavior entirely-making it functionally incompatible for unidirectional DC protection despite identical clamping and power ratings.
Availability
SMBJ64A-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and industrial IoT sensor nodes requiring stable component supply with halogen-free compliance and AEC-Q101-optional qualification path.
Supply support for SMBJ64A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and ruggedized packaging.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the maximum clamping voltage of SMBJ64A-M3/5B under a 10/1000 µs surge?
The SMBJ64A-M3/5B has a maximum clamping voltage (VC) of 103 V at 5.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ64A-M3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ64A-M3/5B suitable for automotive applications?
SMBJ64A-M3/5B is halogen-free and RoHS-compliant, and an AEC-Q101-qualified version is available under ordering code SMBJ64A-HM3/5B. While the base SMBJ64A-M3/5B itself is not AEC-Q101 certified, its construction, thermal rating (TJ max = +150 °C), and surge capability align with automotive subsystem requirements-especially when used in non-safety-critical body electronics with validation per ISO 7637-2.
How does the M3 suffix differ from E3 in SMBJ64A-M3/5B?
The M3 suffix indicates halogen-free, RoHS-compliant construction, whereas E3 denotes RoHS-compliant but standard brominated flame-retardant molding compound. Both share identical electrical specifications, package dimensions, and thermal performance. The SMBJ64A-M3/5B meets stricter environmental mandates such as JEDEC JESD201 Class 2 whisker resistance and IPC-1752 material declarations required in green electronics programs.
What is the standoff voltage rating of SMBJ64A-M3/5B?
The standoff voltage (VWM) of SMBJ64A-M3/5B is 64 V-this is the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. It provides a 12.5% margin above a nominal 48 V DC system, ensuring stable operation during normal conditions while allowing headroom for ripple and transients below the 71.1 V minimum breakdown threshold.
Can SMBJ64A-M3/5B be used in bidirectional signal protection?
No-SMBJ64A-M3/5B is a unidirectional TVS diode, with cathode marked by a band and intended for DC rail protection only. For bidirectional applications such as RS-485, CAN, or AC lines, the SMBJ64CA-M3/5B variant must be used. Using SMBJ64A-M3/5B on bidirectional signals would result in forward conduction during negative half-cycles, causing failure or malfunction.
SMBJ64A-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):
- 64V
- Voltage - Breakdown (Min):
- 71.7V
- 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)
SMBJ64A-M3/5B FAQ
1.How can I place an order for SMBJ64A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64A-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 SMBJ64A-M3/5B reliable?
The price and inventory of SMBJ64A-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 SMBJ64A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ64A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64A-M3/5B?
SMBJ64A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64A-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 SMBJ64A-M3/5B?
For technical support, including SMBJ64A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64A-M3/5B requirements.
6.How does Aetrix verify that SMBJ64A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ64A-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 SMBJ64A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ64A-M3/5B?
All SMBJ64A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64A-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 SMBJ64A-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ64A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64A-M3/5B Tags
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