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Vishay General Semiconductor - Diodes Division SMBJ45CAHE3/5B
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- Part No.:
- SMBJ45CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CAHE3/5B.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,340
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Product details
Overview
SMBJ45CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ45CAHE3/5B datasheet, SMBJ45CAHE3/5B pinout, SMBJ45CAHE3/5B application, or SMBJ45CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering consistent clamping performance without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables effective transient energy diversion during ESD or lightning-induced surges.
The device is rated for repetitive 10/1000 µs pulses at 0.01 % duty cycle and supports operating junction temperatures from –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 50.0 V / 55.3 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on within specification across production lot. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamping voltage under standardized 10/1000 µs surge; limits downstream IC stress during transient events. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports robust protection in industrial-grade surge environments. |
| ID @ VWM | <1.0 µA - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating enables deployment in under-hood automotive and high-ambient industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
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), cathode band absent per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Accepts surge current during positive voltage excursions; connects to protected line or I/O node. |
| Anode | Transient current exit (negative half-cycle) | Serves as return path during negative transients; symmetrical conduction eliminates need for polarity awareness. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| AEC-Q101 qualified | Validated for automotive electronics use including infotainment and body control modules requiring reliability certification. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) when mounted per recommended pad layout. |
| MSL Level 1 | Allows unlimited floor life and single-reflow processing at 260 °C peak, simplifying manufacturing flow. |
| Glass passivated junction | Provides stable VBR over temperature and lifetime, minimizing parameter drift in harsh operating conditions. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA loops) from inductive switching transients in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and connector interface to limit voltage excursion to ≤72.7 V. Use Value: Prevents damage to precision DACs and op-amps by suppressing transients exceeding 45 V stand-off without affecting DC accuracy. |
Use Scenario: Shielding RS-485 transceivers on telecom base station backplanes from lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppressor on differential bus lines, positioned before ESD diode arrays. Use Value: Limits clamped voltage to 72.7 V during 10/1000 µs surges, preserving transceiver integrity per IEC 61000-4-5 compliance. |
| Automotive Body Control Module | Consumer Power Adapter Input |
|
Use Scenario: Safeguarding LIN bus nodes against load dump and alternator ripple in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional TVS connected across LIN data line and ground, leveraging AEC-Q101 qualification. Use Value: Withstands 150 °C junction temperature and repeated 600 W surges without degradation in under-dash environments. |
Use Scenario: Input-stage surge suppression on 5 V/12 V wall adapters exposed to mains-borne transients. IC Role / Device Role / Timing Role: First-line protection element between AC-DC rectifier output and primary DC rail. Use Value: Clamps 45 V-rated input to ≤72.7 V during 10/1000 µs events, preventing overvoltage failure of downstream regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated. | Choose SMBJ45CA-M3/5B when halogen-free bill-of-materials is required; otherwise SMBJ45CAHE3/5B offers same performance with standard RoHS compliance. |
| SMCJ45CAHE3/5B | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge energy handling or improved thermal dissipation is needed, e.g., in outdoor telecom equipment. | Select SMCJ45CAHE3/5B only if PCB layout allows larger footprint and system-level surge requirements exceed 600 W. |
Compared with SMBJ45CAHE3/5B, the M3 variant adds halogen-free construction without altering electrical behavior, while the SMCJ45CAHE3/5B trades compactness for higher power handling and lower thermal resistance - making SMBJ45CAHE3/5B optimal for space-constrained, AEC-Q101–required designs.
Availability
SMBJ45CAHE3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ45CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-volume manufacturability.
The SMBJ series is engineered for robust transient suppression in space-constrained surface-mount applications, targeting industrial, automotive, and telecom systems where bidirectional clamping and AEC-Q101 validation are critical.
FAQ
What does the "CA" suffix indicate in SMBJ45CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ45CAHE3/5B provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SMBJ45A). This eliminates polarity concerns during board assembly and enables protection of AC-coupled or floating signal paths without additional circuitry.
Is SMBJ45CAHE3/5B qualified for automotive applications?
Yes, SMBJ45CAHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix) and documentation. It is validated for use in automotive electronics including body control modules and infotainment systems where reliability under temperature cycling and mechanical stress is mandatory.
What is the maximum clamping voltage of SMBJ45CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ45CAHE3/5B is 72.7 V at 8.3 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the SMB (DO-214AA) package of SMBJ45CAHE3/5B affect thermal performance?
The SMB package delivers RθJA = 100 °C/W when mounted on 0.2" × 0.2" copper pads. This thermal resistance determines allowable power derating above 25 °C ambient; for example, at 85 °C ambient, SMBJ45CAHE3/5B must be operated below ~3.2 W to maintain TJ ≤ 150 °C.
Can SMBJ45CAHE3/5B replace unidirectional TVS diodes like SMBJ45A?
No - SMBJ45CAHE3/5B is bidirectional and lacks polarity marking, whereas SMBJ45A is unidirectional with cathode band identification. Substitution requires verifying circuit topology: SMBJ45CAHE3/5B suits AC or floating nodes, while SMBJ45A is appropriate for DC-biased lines where forward conduction must be blocked.
SMBJ45CAHE3/5B 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ45CAHE3/5B FAQ
1.How can I place an order for SMBJ45CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CAHE3/5B 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 SMBJ45CAHE3/5B reliable?
The price and inventory of SMBJ45CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ45CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CAHE3/5B?
SMBJ45CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CAHE3/5B 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 SMBJ45CAHE3/5B?
For technical support, including SMBJ45CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ45CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ45CAHE3/5B 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 SMBJ45CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ45CAHE3/5B?
All SMBJ45CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CAHE3/5B, 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 SMBJ45CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ45CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CAHE3/5B Tags
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