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Vishay General Semiconductor - Diodes Division SMBJ64CAHM3_A/H
- Part No.:
- SMBJ64CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAHM3_A/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
SMBJ64CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust ESD and surge protection on signal/power 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed to safeguard MOSFET gates, sensor interfaces, and industrial I/O ports against lightning-induced transients.
For engineers reviewing the SMBJ64CAHM3_A/H datasheet, SMBJ64CAHM3_A/H pinout, SMBJ64CAHM3_A/H application, or SMBJ64CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT assembly on standard PCB pad layouts per JEDEC DO-214AA footprint.
Technical Context
This device operates as a voltage-clamped crowbar during overvoltage events: when reverse (or forward, in bidirectional mode) voltage exceeds VBR, it avalanches into low-impedance conduction to shunt surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMBJ64CAHM3_A/H delivers symmetrical clamping in both polarities, supports 100 A non-repetitive forward surge (IFSM), maintains ≤1.0 µA reverse leakage at 64 V (VWM), and exhibits a +0.105 %/°C temperature coefficient of VBR - enabling predictable performance across -55 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse working 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 - verified avalanche onset range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 103 V at 5.8 A - clamping voltage under 10/1000 µs surge; limits downstream voltage stress to <103 V during worst-case transients. |
| PPPM | 600 W - peak pulse power handling capability; sustains 600 W for 1 ms pulses without failure. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off; minimizes standby power loss in battery-powered sensors. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.21 mm × 4.06 mm body and 2.20 mm height; compatible with IPC-7351B footprint. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration - no polarity marking; terminals are symmetric anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative polarity event) | Conducts during negative transients; forms one side of symmetrical clamping path. |
| Cathode | Surge current entry (positive polarity event) | Conducts during positive transients; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal lines. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control and ADAS sensor protection. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and full RoHS compliance - meets EU ELV and China RoHS requirements. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/85 % RH - supports standard SMT reflow without dry-pack or baking. |
| 600 W surge rating | Handles IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) surges with margin - protects against indirect lightning and inductive switching. |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting 24 V analog sensor outputs (e.g., pressure, temperature) from load dump and relay coil flyback in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Limits induced voltage spikes to ≤103 V, preventing latch-up or permanent damage to 3.3 V/5 V signal conditioning ICs. |
Use Scenario: Safeguarding CANH/CANL differential pair in automotive body control modules exposed to ISO 7637-2 pulse 1/2a/5a. IC Role / Device Role / Timing Role: One SMBJ64CAHM3_A/H per line (CANH-to-GND, CANL-to-GND), providing symmetrical clamping independent of bus polarity. Use Value: Maintains CAN signal integrity by clamping common-mode surges while preserving <1 ns response time and <1.0 µA leakage at 12 V nominal. |
| Telecom Power Input Stage | Consumer USB Port ESD Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE-powered equipment (e.g., IP cameras, wireless APs) after DC-DC conversion. IC Role / Device Role / Timing Role: Placed between isolated 48 V rail and ground to absorb residual transients escaping primary-side protection. Use Value: Withstands 600 W surges without degradation, ensuring >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
Use Scenario: Board-level ESD protection for USB 2.0 D+/D− lines in smart home hubs, where compact size and low capacitance are critical. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) bidirectional clamp mounted directly at USB connector. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) while adding <0.5 dB insertion loss at 480 MHz - preserves USB 2.0 eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CAHE3_A/H | Same electrical specs, but RoHS-compliant (non-halogen-free) construction; MSL Level 1, J-STD-020 compliant. | Lacks halogen-free certification; acceptable for commercial/industrial use where halogen content is unrestricted. | Select when halogen-free requirement is not mandated and cost optimization is prioritized. |
| SMAJ64CAHM3_A/H | Lower PPPM (400 W vs. 600 W); same VWM/VBR/VC; SMA (DO-214AC) package - smaller footprint (4.5 mm × 2.7 mm). | Reduced surge margin; suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD, not IEC 61000-4-5 surges). | Choose for space-constrained designs where 400 W rating suffices and PCB area is premium. |
Compared with SMBJ64CAHE3_A/H, the SMBJ64CAHM3_A/H adds halogen-free compliance without sacrificing electrical performance; versus SMAJ64CAHM3_A/H, it provides 50 % higher surge power handling and superior thermal dissipation via larger SMB package - critical for sustained industrial surge immunity.
Availability
SMBJ64CAHM3_A/H is available at Aetrix Electronics and suitable for industrial sensor interface, automotive CAN bus protection, and telecom power input stage applications requiring stable component supply, AEC-Q101 qualification, and halogen-free compliance.
Supply support for SMBJ64CAHM3_A/H 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 optimization.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching is non-negotiable.
FAQ
What does the "CA" suffix indicate in SMBJ64CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration: SMBJ64CAHM3_A/H clamps voltage transients equally in both polarities, making it ideal for AC-coupled lines, floating grounds, or differential buses like CAN or RS-485 where polarity reversal may occur. Unlike unidirectional "A" variants, it has no cathode band marking and identical VBR/VC in forward and reverse directions.
Is SMBJ64CAHM3_A/H suitable for protecting 48 V DC power rails?
Yes - SMBJ64CAHM3_A/H has a 64 V stand-off voltage (VWM), providing a 16 V margin above nominal 48 V systems. Its 103 V clamping voltage (VC) ensures downstream components rated for ≥100 V withstand worst-case surges, and its 600 W peak pulse power handles IEC 61000-4-5 Level 4 transients common in 48 V PoE and industrial power distribution.
How does the HM3 suffix differ from HE3 in SMBJ64CAHM3_A/H?
The HM3 suffix indicates halogen-free, RoHS-compliant construction meeting IEC 61249-2-21 standards, whereas HE3 is RoHS-compliant but not halogen-free. Both are AEC-Q101 qualified and share identical electrical specs, thermal performance, and packaging - the distinction lies solely in material composition for environmental compliance in regulated markets.
What is the maximum PCB pad size recommended for SMBJ64CAHM3_A/H thermal performance?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for rated thermal performance. Using this pad layout achieves the documented RθJA of 100 °C/W and supports full 600 W surge capability; smaller pads increase junction temperature and require derating per Figure 2 in the datasheet.
Does SMBJ64CAHM3_A/H meet IEC 61000-4-2 and IEC 61000-4-5 standards?
SMBJ64CAHM3_A/H is characterized to withstand ±15 kV contact / ±25 kV air discharge (IEC 61000-4-2) and 4 kV line-earth / 2 kV line-line surges (IEC 61000-4-5 Level 4) when applied per standard test circuits. Its 600 W rating, fast response (<1 ns), and low clamping voltage make it suitable for system-level compliance - though final validation requires board-level testing.
SMBJ64CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ64CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAHM3_A/H 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_A/H reliable?
The price and inventory of SMBJ64CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ64CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAHM3_A/H?
SMBJ64CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAHM3_A/H 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_A/H?
For technical support, including SMBJ64CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAHM3_A/H requirements.
6.How does Aetrix verify that SMBJ64CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAHM3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ64CAHM3_A/H?
All SMBJ64CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAHM3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ64CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CAHM3_A/H Tags
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