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Vishay General Semiconductor - Diodes Division SMBJ45CA-E3/1
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- Part No.:
- SMBJ45CA-E3/1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CA-E3/1.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
SMBJ45CA-E3/1 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMBJ) package, designed for clamping voltage transients on power and signal lines. It features 45 V stand-off voltage (VWM), 72.7 V maximum clamping voltage at 8.3 A peak pulse current, 600 W peak pulse power rating with 10/1000 μs waveform, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBJ45CA-E3/1 datasheet, SMBJ45CA-E3/1 pinout, SMBJ45CA-E3/1 application, or SMBJ45CA-E3/1 equivalent, key selection criteria include bi-directional clamping capability, low leakage (<1.0 μA at 45 V), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on consumer, industrial, and automotive PCBs.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 50.0–55.3 V (min/max) under 1 mA test current. Its clamping behavior follows standardized 10/1000 μs surge waveform compliance per ANSI/IEEE C62.35, delivering predictable protection during inductive switching events.
Thermal performance is defined by junction-to-ambient thermal resistance of 100 °C/W (typical) and maximum operating junction temperature of +150 °C. The device uses glass-passivated silicon junction technology and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 45 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 50.0–55.3 V at 1 mA - Confirmed bi-directional avalanche onset range; ensures symmetrical triggering |
| VC (Clamping Voltage) | 72.7 V at IPPM = 8.3 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capacity under standard 10/1000 μs waveform; enables robust protection against common transients |
| ID (Reverse Leakage) | <1.0 μA at 45 V - Minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max. | +150 °C - Enables operation in under-hood automotive and industrial environments without derating |
| MSL Level | Level 1 (J-STD-020) - Supports standard reflow profiles up to 260 °C peak without baking |
Pinout & Package
DO-214AA (SMBJ) surface-mount package with gull-wing leads; bi-directional construction has no polarity marking - terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Bi-directional surge path | Either terminal serves as current entry point during positive or negative transients; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity testing without external series impedance |
| AEC-Q101 qualified | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-failure field reliability |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| RoHS-compliant, matte tin plating | Enables lead-free reflow assembly and meets IPC-J-STD-002B solderability requirements |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, load dump) |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at board-level input filter stage. Use Value: Limits transient voltage to ≤72.7 V, safeguarding downstream DC-DC converters and microcontrollers rated for 48 V absolute maximum. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance transient shunt across differential signal pair. Use Value: Adds <1.0 μA leakage at 45 V, preserving signal accuracy while suppressing 600 W surges induced by nearby motor switching. |
| Telecom Power Supply Input | Consumer USB Port ESD Protection |
Use Scenario: Front-end surge suppression on AC/DC adapter secondary-side 48 V output rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp before POL regulators and Ethernet PHYs. Use Value: Withstands repetitive 10/1000 μs surges at 0.01% duty cycle, meeting GR-1089-CORE telecom immunity requirements. |
Use Scenario: Board-level protection for USB 2.0 VBUS line against human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp between VBUS and GND. Use Value: Responds in <1 ns to ±15 kV HBM events, limiting clamped voltage to 72.7 V without degrading USB enumeration timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ45CA | Same DO-214AC (SMA) package; lower PPPM (400 W); higher VC (73.0 V at 8.3 A) | Less suitable for IEC 61000-4-5 Level 4; acceptable for cost-sensitive consumer designs with lower surge exposure | Select when footprint compatibility with SMA package is required and 600 W rating is not mandatory |
| ON Semiconductor SMCJ45CA | DO-214AB (SMC) package; same 600 W rating; slightly higher VBR (50.0–56.0 V); VC = 72.7 V | Better thermal dissipation (RθJA = 40 °C/W) but larger PCB area; preferred for high-temperature industrial enclosures | Choose when enhanced thermal performance justifies larger 7.11 × 6.22 mm footprint over SMBJ's 4.57 × 3.94 mm |
Compared with SMAJ45CA and SMCJ45CA, SMBJ45CA-E3/1 delivers identical clamping voltage and AEC-Q101 qualification in the smallest standard surface-mount TVS package, optimizing board space while maintaining full 600 W surge capability and automotive-grade reliability.
Availability
SMBJ45CA-E3/1 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer USB port protection requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ45CA-E3/1 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability surface-mount transient suppression in space-constrained automotive and industrial systems, balancing surge robustness, thermal performance, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBJ45CA-E3/1 under a 10/1000 μs surge?
The SMBJ45CA-E3/1 exhibits a maximum clamping voltage (VC) of 72.7 V when subjected to an 8.3 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ45CA-E3/1 maintains this clamping performance consistently across its operational temperature range.
Is SMBJ45CA-E3/1 suitable for automotive applications?
Yes, SMBJ45CA-E3/1 is AEC-Q101 qualified and rated for junction temperatures up to +150 °C, making it suitable for under-hood and body-control module applications. Its bi-directional architecture, low leakage (<1.0 μA), and robust 600 W surge rating align with automotive transient immunity standards including ISO 7637-2 and ISO 16750-2. The SMBJ45CA-E3/1 is explicitly listed in Vishay's AEC-Q101 qualified product documentation.
Does SMBJ45CA-E3/1 have polarity markings?
No, SMBJ45CA-E3/1 is a bi-directional TVS diode and carries no cathode band or polarity marking. Both terminals are electrically identical and interchangeable, enabling simplified layout and eliminating orientation errors during automated placement. This symmetry is confirmed in the Vishay datasheet note stating "no marking on bi-directional types" and verified in the mechanical drawing for DO-214AA.
What is the maximum reverse leakage current for SMBJ45CA-E3/1 at rated VWM?
The maximum reverse leakage current (ID) for SMBJ45CA-E3/1 is 1.0 μA at its 45 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss and signal distortion in high-impedance sensing and bias networks. The SMBJ45CA-E3/1 maintains leakage below 10 μA even at elevated temperatures up to +125 °C, as confirmed by derating curves in the Vishay datasheet.
What package type does SMBJ45CA-E3/1 use?
SMBJ45CA-E3/1 uses the DO-214AA (SMBJ) surface-mount package, measuring 4.57 mm × 3.94 mm with gull-wing leads. It complies with MSL Level 1 per J-STD-020 and supports standard lead-free reflow profiles up to 260 °C peak. The SMBJ45CA-E3/1 package is distinct from DO-214AB (SMC) and DO-214AC (SMA), offering optimal balance of surge capability and board-space efficiency.
SMBJ45CA-E3/1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ45CA-E3/1 FAQ
1.How can I place an order for SMBJ45CA-E3/1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CA-E3/1 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 SMBJ45CA-E3/1 reliable?
The price and inventory of SMBJ45CA-E3/1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CA-E3/1 is usually 5 days.
3.What payment methods are accepted for SMBJ45CA-E3/1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CA-E3/1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CA-E3/1?
SMBJ45CA-E3/1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CA-E3/1 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 SMBJ45CA-E3/1?
For technical support, including SMBJ45CA-E3/1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CA-E3/1 requirements.
6.How does Aetrix verify that SMBJ45CA-E3/1 is sourced from the original manufacturer or authorized distributors?
All SMBJ45CA-E3/1 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 SMBJ45CA-E3/1 meets industry standards.
7.What is the process for return or replacement of SMBJ45CA-E3/1?
All SMBJ45CA-E3/1 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CA-E3/1, 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 SMBJ45CA-E3/1 part is unused and in its original packaging.
Return procedure for SMBJ45CA-E3/1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CA-E3/1 Tags
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