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Vishay General Semiconductor - Diodes Division SMBJ64CAHM3_B/I
- Part No.:
- SMBJ64CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAHM3_B/I.pdf
- Description:
- 600W,64V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,698
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Product details
Overview
SMBJ64CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ64CAHM3_B/I datasheet, SMBJ64CAHM3_B/I pinout, SMBJ64CAHM3_B/I application, or SMBJ64CAHM3_B/I equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay HM3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding VWM, it avalanches symmetrically in both directions to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package enables automated placement on high-density PCBs.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation up to TJ = +150 °C. The device meets UL 497B recognition (QVGQ2) and is rated for repetitive 0.01% duty cycle surges under IEC 61000-4-5-like conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V DC systems. |
| VBR min/max | 71.1 V / 78.6 V at 1 mA - Confirmed bidirectional breakdown window; ensures consistent triggering across temperature and unit variation. |
| VC @ IPPM | 103 V at 5.8 A - Clamping voltage under 10/1000 µs surge; limits stress on protected ICs to <103 V during worst-case transients. |
| PPPM | 600 W - Peak pulse power handling capability; supports protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges when properly mounted. |
| IPPM | 5.8 A - Peak pulse current corresponding to VC; derived from 600 W / 103 V; validates energy absorption capacity. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial environments without derating. |
| MSL Level | Level 1 per J-STD-020 - No floor life limitation; supports standard SMT reflow without baking. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical avalanche junction; accepts surge current flow in either direction relative to cathode. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical junction; completes low-impedance path to ground or return rail during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus, sensor bridges) without polarity concerns. |
| 600 W peak pulse power | Supports IEC 61000-4-5 surge immunity up to 4 kV (2 Ω source impedance) when used with appropriate PCB layout and grounding. |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and infotainment power supplies where reliability under thermal cycling is critical. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills environmental compliance requirements for EU, China RoHS, and automotive OEM sustainability mandates without compromising surge performance. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or damage to 64 V-rated downstream components. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O against inductive kickback from 24–48 V DC motor switching. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across power input and signal lines to clamp spikes before they reach logic-level components. Use Value: Prevents repeated MCU resets and MOSFET failure caused by >100 V transients induced by relay or H-bridge commutation. |
Use Scenario: Guarding LIN bus transceivers and power supply inputs in door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±100 V/500 ms load dump surges and fast ESD pulses on communication lines. Use Value: Maintains communication integrity during battery disconnection/reconnection cycles without requiring external series impedance or filtering. |
| Telecom Power Feeds | Industrial Sensor Signal Conditioning |
|
Use Scenario: Safeguarding 48 V PoE-powered equipment front-ends against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail upstream of DC/DC converters and isolation barriers. Use Value: Limits surge energy entering isolated domains, enabling compliance with IEC 61000-4-5 Level 3 (2 kV differential mode) without secondary protection stages. |
Use Scenario: Protecting analog front-ends of pressure/temperature sensors connected to long cables in factory automation cabinets. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential sensor outputs (e.g., 0–10 V, 4–20 mA) to suppress EFT bursts and cable-coupled noise. Use Value: Preserves signal fidelity by clamping transients below ADC input absolute maximum ratings while adding <0.5 pF parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CAHE3_B/I | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification; MSL Level 1, same SMB package. | Lacks halogen-free compliance required by some automotive Tier 1s and green procurement policies. | Select when halogen-free content is not mandated and cost optimization is prioritized. |
| SMAJ64CAHM3_A/I | Lower 400 W PPPM, higher VC = 103 V @ 3.5 A; SMA (DO-214AC) package with smaller footprint (4.5 × 2.7 mm) and lower thermal mass. | Reduced surge handling limits suitability to lower-energy interfaces (e.g., USB, UART) rather than 48 V power rails. | Choose for space-constrained designs where 400 W surge rating suffices and board area is critical. |
Compared with SMBJ64CAHE3_B/I, the SMBJ64CAHM3_B/I adds halogen-free compliance without sacrificing surge rating or thermal performance; versus SMAJ64CAHM3_A/I, it delivers 50% higher pulse power in a slightly larger but thermally superior SMB package - critical for sustained surge exposure in industrial power systems.
Availability
SMBJ64CAHM3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SMBJ64CAHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, repeatable clamping, and thermal resilience are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ64CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration: SMBJ64CAHM3_B/I clamps voltage transients symmetrically in both polarities, making it suitable for AC signal lines, differential buses like RS-485 or CAN, and floating power domains where polarity reversal may occur. Unlike unidirectional "A" variants, it has no cathode band marking and identical VBR and VC in either direction - confirmed in Vishay's Electrical Characteristics table for all CA-suffixed SMBJ devices.
Is SMBJ64CAHM3_B/I AEC-Q101 qualified?
Yes, SMBJ64CAHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified) and explicitly noted in the Mechanical Data section of Vishay document 88392. This qualification covers stress tests including temperature cycling, humidity bias, and high-temperature operating life - validating its use in automotive electronic control units such as body modules and lighting drivers.
What is the maximum clamping voltage of SMBJ64CAHM3_B/I and how is it measured?
The maximum clamping voltage (VC) of SMBJ64CAHM3_B/I is 103 V, measured at a peak pulse current (IPPM) of 5.8 A using a 10/1000 µs double-exponential surge waveform per IEC 61000-4-5. This value is guaranteed across temperature and unit variation, and appears in the Electrical Characteristics table under "MAXIMUM CLAMPING VOLTAGE AT IPPM" for the SMBJ64CA entry - directly defining the upper voltage limit imposed on protected circuitry during surge events.
How does the SMB package of SMBJ64CAHM3_B/I compare thermally to SMA or SMC packages?
The SMB (DO-214AA) package of SMBJ64CAHM3_B/I offers RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), striking a balance between compact size and thermal performance. Compared to the smaller SMA (RθJA ≈ 140 °C/W), SMB provides better heat dissipation for repeated surges; versus the larger SMC (RθJA ≈ 60 °C/W), it trades some thermal margin for reduced PCB area - making SMBJ64CAHM3_B/I optimal for mid-power industrial and automotive applications where space and reliability are both constrained.
Can SMBJ64CAHM3_B/I be used in place of a unidirectional TVS like SMBJ64AHM3_B/I?
No - SMBJ64CAHM3_B/I is bidirectional and lacks polarity marking, while SMBJ64AHM3_B/I is unidirectional with a cathode band and only clamps in reverse bias. Substituting them requires circuit redesign: SMBJ64CAHM3_B/I can protect AC or floating nodes but cannot replace a unidirectional device on DC rails where forward conduction must be blocked. The "CA" vs. "A" distinction is fundamental to function, not just packaging - confirmed by separate entries and test conditions in Vishay's datasheet tables.
SMBJ64CAHM3_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:
- -
- 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:
- 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)
SMBJ64CAHM3_B/I FAQ
1.How can I place an order for SMBJ64CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAHM3_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 SMBJ64CAHM3_B/I reliable?
The price and inventory of SMBJ64CAHM3_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 SMBJ64CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ64CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAHM3_B/I?
SMBJ64CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAHM3_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 SMBJ64CAHM3_B/I?
For technical support, including SMBJ64CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ64CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAHM3_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 SMBJ64CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ64CAHM3_B/I?
All SMBJ64CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAHM3_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 SMBJ64CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ64CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CAHM3_B/I Tags
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