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Vishay General Semiconductor - Diodes Division SMBJ64CAHE3/5B
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- Part No.:
- SMBJ64CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAHE3/5B.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,744
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Product details
Overview
SMBJ64CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 64 V standoff 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 (10/1000 µs waveform), making it suitable for protecting MOSFETs and sensor interfaces in industrial control systems.
For engineers reviewing the SMBJ64CAHE3/5B datasheet, SMBJ64CAHE3/5B pinout, SMBJ64CAHE3/5B application, or SMBJ64CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), low leakage (<1.0 µA at VWM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package supports high surge current handling (IPPM = 5.8 A) under standardized 10/1000 µs pulses.
The SMBJ64CAHE3/5B is rated for continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C). Its AEC-Q101 qualification confirms suitability for automotive electronics where reliability under thermal cycling and mechanical stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum reverse working voltage before clamping begins; defines safe operating margin for 48 V DC bus protection. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Confirmed breakdown range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 103 V at 5.8 A - Clamping voltage limits downstream IC stress during 600 W transient events. |
| PPPM | 600 W (10/1000 µs) - Peak pulse power rating validated per ANSI/IEEE C62.35; enables robust ESD and lightning surge immunity. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered sensors. |
| TJ max. | +150 °C - High junction temperature rating supports operation in engine bay or industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance measured on 0.2" × 0.2" copper pads; informs heatsinking requirements for repetitive surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either direction; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to ground or reference rail during clamping; symmetric with Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., USB D+/D−, RS-485) without polarity concerns. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out with minimal trace inductance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements pre-assembly. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, reducing parameter drift in long-life industrial deployments. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤103 V, preventing ADC saturation and latch-up while maintaining <1 µA leakage at 64 V system rail. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs subject to cable-induced surges and EFT bursts. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential pair (A/B) with common-mode choke integration. Use Value: Clamps common-mode transients within 1 ns, preserving signal integrity up to 10 Mbps and meeting IEC 61000-4-4/5 immunity requirements. |
| Consumer Power Adapter Output | Telecom PoE Midspan Port |
|
Use Scenario: Secondary-side overvoltage protection on 5 V/12 V DC outputs of wall adapters subjected to capacitor discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS parallel to output capacitor, triggered only during fault conditions. Use Value: Maintains 64 V nominal operation while clamping spikes >71 V, avoiding false triggering during normal ripple or startup overshoot. |
Use Scenario: Ethernet port protection in IEEE 802.3af/at midspan injectors where DC bias and data signals coexist on same pairs. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging data pair to chassis ground, tolerant of ±48 V DC bias. Use Value: Withstands continuous 48 V PoE voltage while clamping lightning-induced surges to <103 V, ensuring PHY IC survival. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA-M3/5B | Same electrical specs and SMB package; halogen-free, RoHS-compliant, but not AEC-Q101 qualified. | Suitable for commercial/industrial use where automotive qualification is unnecessary. | Select when cost optimization is prioritized and automotive reliability validation is not required. |
| SMCJ64CAHE3/5B | Same VWM/VC ratings but in larger SMC (DO-214AB) package; higher PPPM = 1500 W, RθJA = 50 °C/W. | Better suited for high-energy surge environments (e.g., outdoor telecom cabinets) requiring enhanced thermal margin. | Choose when system-level surge tests exceed IEC 61000-4-5 Level 4 or when board space allows larger footprint. |
Compared with SMBJ64CAHE3/5B, the M3 variant trades AEC-Q101 compliance for halogen-free materials, while the SMCJ64CAHE3/5B offers 2.5× higher pulse power and lower thermal resistance at the cost of increased PCB area and weight.
Availability
SMBJ64CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom power-over-Ethernet ports requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ64CAHE3/5B 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and communications infrastructure where robustness against ESD, EFT, and surge events is mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ64CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ64CAHE3/5B provides symmetrical clamping in both forward and reverse directions. This eliminates polarity concerns during PCB layout and enables use on AC-coupled or differential signal lines such as CAN, RS-485, or USB, unlike unidirectional variants (e.g., SMBJ64AHE3/5B) that require correct cathode orientation.
Is SMBJ64CAHE3/5B suitable for protecting 48 V DC power rails?
Yes, SMBJ64CAHE3/5B is specifically rated for 64 V standoff (VWM), providing a 16 V margin above nominal 48 V systems. Its 103 V clamping voltage ensures downstream components remain within safe operating limits during transients, and its 600 W pulse rating handles typical load-dump and inductive-switching events defined in ISO 16750-2 and SAE J1113-11.
Does SMBJ64CAHE3/5B require a heatsink for standard operation?
No external heatsink is required for SMBJ64CAHE3/5B under typical single-pulse or low-duty-cycle surge conditions. Its RθJA of 100 °C/W is specified for mounting on 0.2" × 0.2" copper pads per terminal. For repetitive surges exceeding 0.01% duty cycle, thermal design must verify junction temperature stays below +150 °C using actual board layout and ambient conditions.
How does the "HE3" suffix affect SMBJ64CAHE3/5B's compliance and qualification?
The "HE3" suffix indicates SMBJ64CAHE3/5B is RoHS-compliant and AEC-Q101 qualified, distinguishing it from commercial-grade variants like "E3". This certification validates performance across extended temperature ranges (–55 °C to +150 °C), thermal cycling, and mechanical shock-essential for automotive ECUs, ADAS sensors, and other mission-critical applications where failure is not acceptable.
Can SMBJ64CAHE3/5B be used in place of SMBJ64AHE3/5B?
No-SMBJ64CAHE3/5B and SMBJ64AHE3/5B are functionally distinct: the former is bidirectional and lacks polarity marking, while the latter is unidirectional with cathode band identification. Substitution requires verifying circuit topology; using SMBJ64CAHE3/5B in a unidirectional design may compromise clamping performance on forward-biased transients and invalidate layout assumptions.
SMBJ64CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ64CAHE3/5B FAQ
1.How can I place an order for SMBJ64CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAHE3/5B 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 SMBJ64CAHE3/5B reliable?
The price and inventory of SMBJ64CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ64CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAHE3/5B?
SMBJ64CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAHE3/5B 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 SMBJ64CAHE3/5B?
For technical support, including SMBJ64CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ64CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAHE3/5B 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 SMBJ64CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ64CAHE3/5B?
All SMBJ64CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAHE3/5B, 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 SMBJ64CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ64CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CAHE3/5B Tags
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