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Vishay General Semiconductor - Diodes Division SMBJ64CAHM3/H
- Part No.:
- SMBJ64CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAHM3/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,741
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Product details
Overview
SMBJ64CAHM3/H 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 (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces and telecom front-end circuits.
For engineers reviewing the SMBJ64CAHM3/H datasheet, SMBJ64CAHM3/H pinout, SMBJ64CAHM3/H application, or SMBJ64CAHM3/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, AEC-Q101 qualification status, and direct replacement guidance for automotive-grade transient suppression design.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 64 V), but triggers into low-impedance conduction when transients exceed its breakdown threshold. Its bidirectional symmetry enables protection of AC-coupled or floating signal paths without polarity constraints.
Constructed with glass-passivated silicon junctions and rated for TJ = –55 °C to +150 °C, the SMBJ64CAHM3/H sustains repetitive 600 W surges at 0.01% duty cycle and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The halogen-free, RoHS-compliant HM3 suffix confirms automotive-grade material compliance and whisker resistance per JESD 201 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC RMS working range. |
| VBR (min/max) | 71.1 V / 78.6 V at IT = 1 mA - guaranteed breakdown window ensures predictable turn-on across temperature and production lot. |
| VC @ IPPM | 103 V at 5.8 A - clamping voltage during 10/1000 µs surge; limits downstream IC stress to ≤103 V under worst-case transient. |
| PPPM | 600 W - peak pulse power handling with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on 0.2″ × 0.2″ copper pads; informs PCB thermal layout requirements. |
| 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 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity required in circuit layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions above VBR threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without external polarity management. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit)/2 kA (short-circuit) when properly decoupled and routed. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including body control modules, ADAS sensor interfaces, and infotainment power supplies. |
| Halogen-free & RoHS-compliant | Meets automotive environmental standards (e.g., ELV, JIG-STD-020) and supports lead-free reflow assembly at 260 °C peak. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs or ICs. |
Applications
| Industrial Sensor Interface | Automotive CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting 24 V analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in factory automation PLCs. IC Role / Device Role / Timing Role: Shunt TVS placed across sensor supply and ground, clamping transients within 1 ns to limit voltage excursion to ≤103 V. Use Value: Prevents sensor IC reset or ADC saturation during 100 V/10 ms load dump events while maintaining <1 µA leakage at 24 V nominal. |
Use Scenario: Safeguarding high-speed CAN FD transceivers against ESD (±15 kV contact) and ISO 7637-2 pulse 1/2a/5a in vehicle gateway modules. IC Role / Device Role / Timing Role: Bidirectional TVS connected between CANH/CANL lines and chassis ground, symmetrically suppressing common-mode and differential transients. Use Value: Maintains CAN signal integrity by limiting clamping voltage to 103 V without distorting data edges, validated per AEC-Q101 stress testing. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
|
Use Scenario: Front-end surge suppression on 48 V PoE-powered telecom equipment inputs exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary shunt clamp on DC input rail, coordinated with upstream fuse and secondary filtering to absorb 600 W transient energy. Use Value: Survives repeated 10/1000 µs surges up to 4 kV per IEC 61000-4-5, enabling Class III installation without external MOVs or gas discharge tubes. |
Use Scenario: Overvoltage hardening of USB-C VBUS line in portable docking stations subjected to hot-plug transients and adapter fault conditions. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBUS and GND to clamp ±20 V faults to ≤103 V, preventing USB PD controller latch-up. Use Value: Halogen-free HM3 construction satisfies consumer product environmental mandates while delivering sub-1 ns response time for fast USB-C fault clearing. |
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/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-automotive); lacks AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. | Suitable for industrial/commercial equipment where automotive reliability validation is not required. | Select when cost sensitivity outweighs automotive qualification needs and full lifecycle traceability is not mandated. |
| SMAJ64CAHM3 | Lower 400 W PPPM rating, same VWM/VBR/VC, SMA (DO-214AC) package - smaller footprint (4.57 mm × 2.69 mm) but lower thermal mass and surge margin. | Used where board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only, not full IEC 61000-4-5 surge. | Choose for compact consumer designs accepting reduced 400 W surge headroom and higher thermal resistance (RθJA = 140 °C/W). |
Compared with SMBJ64CAHE3/H, the SMBJ64CAHM3/H adds AEC-Q101 qualification and halogen-free compliance for automotive use; versus SMAJ64CAHM3, it delivers 50% higher surge power (600 W vs. 400 W) and superior thermal performance in the larger SMB package - critical for sustained transient events in harsh environments.
Availability
SMBJ64CAHM3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus protection, telecom power input stages, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ64CAHM3/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 TVS devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where robustness, repeatable clamping, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ64CAHM3/H at its rated peak pulse current?
The SMBJ64CAHM3/H has a maximum clamping voltage (VC) of 103 V at 5.8 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a worst-case transient event, ensuring downstream components remain within safe operating voltage margins. The SMBJ64CAHM3/H maintains this clamping performance across its specified junction temperature range of –55 °C to +150 °C.
Is SMBJ64CAHM3/H suitable for automotive applications?
Yes, SMBJ64CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance. It is explicitly intended for automotive use cases such as CAN bus protection, body control modules, and ADAS sensor interfaces where reliability under thermal cycling, vibration, and high-energy transients is required. The SMBJ64CAHM3/H datasheet confirms qualification per AEC-Q101 test conditions.
How does the bidirectional configuration of SMBJ64CAHM3/H affect circuit placement?
The SMBJ64CAHM3/H has no polarity marking and functions identically in both directions, allowing placement across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs (RS-485, CAN), AC-coupled lines, or floating power domains. Unlike unidirectional TVS diodes, it eliminates the need for orientation verification during assembly and avoids failure modes caused by reversed installation. This simplifies layout and reduces manufacturing error risk.
What is the thermal resistance of SMBJ64CAHM3/H, and how does it impact PCB layout?
The SMBJ64CAHM3/H 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. To maintain safe junction temperatures under repetitive surge conditions, PCB layout must provide adequate copper area and thermal vias to inner ground planes. Reducing RθJA below 100 °C/W via enhanced copper pours directly extends surge endurance and improves long-term reliability of the SMBJ64CAHM3/H in high-temperature environments.
Does SMBJ64CAHM3/H meet industry surge immunity standards?
Yes, the SMBJ64CAHM3/H supports compliance with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kA line-to-line) when implemented with appropriate PCB layout, decoupling, and coordination with upstream fusing. Its 600 W peak pulse power rating, 103 V clamping voltage, and fast response time (<1 ns) enable effective suppression of lightning-induced surges and switching transients. System-level validation is required, but the SMBJ64CAHM3/H provides the foundational clamping capability needed for certification.
SMBJ64CAHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMBJ64CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAHM3/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/H reliable?
The price and inventory of SMBJ64CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMBJ64CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAHM3/H?
SMBJ64CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAHM3/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/H?
For technical support, including SMBJ64CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAHM3/H requirements.
6.How does Aetrix verify that SMBJ64CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMBJ64CAHM3/H?
All SMBJ64CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMBJ64CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CAHM3/H Tags
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