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Vishay General Semiconductor - Diodes Division SMBJ64AHM3_B/I
- Part No.:
- SMBJ64AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64AHM3_B/I.pdf
- Description:
- 600W,64V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,779
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Product details
Overview
SMBJ64AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown range (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, microcontrollers, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ64AHM3_B/I datasheet, SMBJ64AHM3_B/I pinout, SMBJ64AHM3_B/I application, or SMBJ64AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status (via HM3 suffix), halogen-free RoHS compliance, thermal resistance (RθJA = 100 °C/W), and junction temperature limit of 150 °C under repetitive surge conditions.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1.0 ps), enabling effective suppression of sub-microsecond transients induced by relay switching or lightning surges.
The SMBJ64AHM3_B/I is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C). Its cathode-band marking identifies polarity, and matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V DC bus protection. |
| VBR (min/max) | 71.1 V / 78.6 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 103 V at 5.8 A - Clamping voltage limits downstream IC stress during 600 W transient events (10/1000 µs). |
| PPPM | 600 W - Peak pulse power handling capacity per single transient; validated with 0.01% duty cycle derating. |
| IFSM | 100 A - Surge current rating for 8.3 ms half-sine wave; supports protection of high-current power stages. |
| TJ max. | +150 °C - Maximum junction temperature enables operation in enclosed industrial enclosures without forced cooling. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads; MSL Level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in unidirectional configuration. | Provides return path during clamping; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., 48 V rail or signal input). | Defines clamping polarity; reverse-biased during overvoltage event to shunt surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and ADAS power rail protection. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and lead finish - meets IPC-1752A material declaration and EU RoHS Directive 2011/65/EU. |
| 600 W peak pulse power | Rated per 10/1000 µs waveform with 0.01% duty cycle - provides robust immunity against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground). |
| Low incremental surge resistance | Enables tight clamping window (VC − VBR ≈ 24.4 V) - reduces voltage overshoot on protected ICs during fast transients. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and peak reflow up to 260 °C - eliminates baking requirement and supports high-yield automated assembly. |
Applications
| Industrial Motor Drive Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses inductive kickback from 24–48 V solenoid drivers and relay coils in PLC output modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between coil supply rail and ground, triggered within <1 ns to clamp spikes up to 150 V. Use Value: Prevents latch-up or gate oxide damage in driving MOSFETs (e.g., STP16NF06L) by limiting transient voltage to ≤103 V at 5.8 A. |
Use Scenario: Protects LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in BCM power distribution networks. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators, activated only during >64 V excursions. Use Value: Maintains system uptime by preventing brownout resets during ISO 7637-2 Pulse 5a (75 V/200 ms) events without sacrificing quiescent current. |
| Telecom Power Supply Input | Industrial Sensor Signal Conditioning |
|
Use Scenario: Shields AC/DC adapter primary-side controllers and secondary-side DC-DC converters from lightning-induced surges on 48 V telecom rectifier outputs. IC Role / Device Role / Timing Role: Primary-side clamping device on +48 V output rail, coordinated with MOV and fuse for Class II surge immunity. Use Value: Enables compliance with IEC 61000-4-5 Ed.3 (4 kV line-earth) while maintaining <100 ns response to preserve feedback loop stability. |
Use Scenario: Guards analog front-end inputs (e.g., ADS1115, INA199) against ESD and cable discharge events in factory-floor pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional TVS on differential signal pair, grounded via short trace to local AGND. Use Value: Limits ESD-induced offset drift to <0.5 LSB in 16-bit ADC systems by clamping ±8 kV contact discharge to <103 V without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64AHE3_B/I | Same electrical specs but RoHS-compliant (E3), not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; unsuitable for automotive production where halogen-free or AEC-Q101 is mandated. | Select SMBJ64AHE3_B/I only if halogen content and automotive qualification are not required. |
| SMAJ64A-M3 | Lower peak pulse power (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Acceptable for lower-energy transients (IEC 61000-4-5 Level 2); limited to ambient temperatures <85 °C due to thermal constraints. | Choose SMAJ64A-M3 only for space-constrained designs with reduced surge threat level and adequate thermal margin. |
Compared with SMBJ64AHM3_B/I, SMBJ64AHE3_B/I offers identical clamping performance but omits halogen-free and AEC-Q101 compliance, while SMAJ64A-M3 trades 33 % lower surge power and inferior thermal performance for a smaller 2.5 mm × 4.5 mm footprint - making SMBJ64AHM3_B/I the optimal choice for automotive and high-reliability industrial applications demanding full 600 W capability and certified materials.
Availability
SMBJ64AHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ64AHM3_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, MOSFETs, optoelectronics, and passive components 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 systems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of SMBJ64AHM3_B/I at its rated peak pulse current?
The SMBJ64AHM3_B/I has a maximum clamping voltage (VC) of 103 V at 5.8 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream ICs. The SMBJ64AHM3_B/I maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C), with minimal derating up to TA = 125 °C.
Is SMBJ64AHM3_B/I suitable for automotive applications?
Yes, SMBJ64AHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting automotive requirements for under-hood and body electronics. It is explicitly listed in Vishay's AEC-Q101 qualified devices list and validated for temperature cycling, highly accelerated life testing (HALT), and ESD robustness. The SMBJ64AHM3_B/I is commonly deployed in automotive BCMs, ADAS power rails, and infotainment system protection circuits.
How does the SMBJ64AHM3_B/I differ from the SMBJ64A-E3/52 variant?
The SMBJ64AHM3_B/I differs from SMBJ64A-E3/52 in three key aspects: it uses halogen-free molding compound (HM3 vs. E3), is AEC-Q101 qualified (vs. commercial grade only), and ships in 13" tape-and-reel (I-packaging code) versus 7" reel (52-code). Electrically, both share identical VWM, VBR, VC, and PPPM ratings. The SMBJ64AHM3_B/I is therefore specified for automotive and high-reliability industrial use where material compliance and qualification are mandatory.
What is the thermal resistance of SMBJ64AHM3_B/I, and how does it affect PCB layout?
The SMBJ64AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain TJ ≤ 150 °C during repetitive surges, designers must allocate ≥250 mm² of 2-oz copper per pad and avoid thermal isolation. The SMBJ64AHM3_B/I's RθJA directly determines allowable surge repetition rate and average power dissipation in continuous operation.
Does SMBJ64AHM3_B/I have polarity marking, and how is it oriented in circuit?
Yes, SMBJ64AHM3_B/I is unidirectional and features a cathode band marking on the package body - consistent with DO-214AA standard orientation. In circuit, the cathode connects to the line being protected (e.g., +48 V rail), and the anode connects to system ground. This orientation ensures reverse-bias operation during overvoltage events, enabling avalanche conduction to shunt surge current safely to ground. Incorrect polarity will prevent clamping and may cause catastrophic failure during transients.
SMBJ64AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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:
- 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)
SMBJ64AHM3_B/I FAQ
1.How can I place an order for SMBJ64AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64AHM3_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 SMBJ64AHM3_B/I reliable?
The price and inventory of SMBJ64AHM3_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 SMBJ64AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ64AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64AHM3_B/I?
SMBJ64AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64AHM3_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 SMBJ64AHM3_B/I?
For technical support, including SMBJ64AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ64AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ64AHM3_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 SMBJ64AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ64AHM3_B/I?
All SMBJ64AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64AHM3_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 SMBJ64AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ64AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64AHM3_B/I Tags
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