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Vishay General Semiconductor - Diodes Division SMBJ45CHE3/52
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- Part No.:
- SMBJ45CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CHE3/52.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,089
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Product details
Overview
SMBJ45CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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.
For engineers reviewing the SMBJ45CHE3/52 datasheet, SMBJ45CHE3/52 pinout, SMBJ45CHE3/52 application, or SMBJ45CHE3/52 equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines in automotive-grade industrial systems where AEC-Q101 qualification, low clamping ratio, and fast response time are critical.
Technical Context
The SMBJ45CHE3/52 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient energy into ground. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
It delivers 72.7 V clamping voltage at 8.3 A IPPM (10/1000 µs), yielding a clamping ratio of 1.62 - indicating strong suppression efficiency relative to its 45 V working voltage. Thermal resistance is rated at 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min/max | 50.0 V / 55.3 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during transients. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage seen by protected circuit during worst-case 600 W surge event. |
| PPPM | 600 W - Peak pulse power handling capability per 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges. |
| IR @ VWM | 1.0 µA - Ultra-low reverse leakage at rated stand-off, minimizing standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating, supporting under-hood automotive and high-temperature industrial use. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.57 mm footprint and 2.20 mm height, compatible with automated SMT assembly. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; enables reverse-biased clamping operation when cathode is at higher potential. |
| Cathode | Transient clamping terminal | Connected to protected line (e.g., 45 V supply rail); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring zero-failure reliability under thermal cycling and vibration. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (4 kV/2 Ω) without degradation when mounted per recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during clamping, reducing stress on downstream MOSFETs, ICs, and interface components. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 45 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 45 V supply and chassis ground to clamp positive-going surges above 55 V. Use Value: Limits voltage excursion to ≤72.7 V during 8.3 A surge, preventing damage to 50 V-rated CAN transceivers and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory-floor pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across signal and return path to absorb ±8 kV contact ESD (IEC 61000-4-2) without affecting 20 kHz bandwidth. Use Value: Sub-1 ns response time and <1 µA leakage preserve signal integrity while meeting IEC 61326-1 immunity requirements. |
| Telecom DC Feeder Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Safeguarding PoE++ (IEEE 802.3bt Type 4) 57 V DC feeders against induced lightning surges on outdoor Ethernet runs. IC Role / Device Role / Timing Role: Unidirectional clamping device installed at PSE port output to limit transient voltage before reaching powered device input stage. Use Value: 600 W rating handles 10/1000 µs surges up to 4 kV; RoHS-compliant HE3 suffix supports telecom environmental compliance. |
Use Scenario: Adding secondary overvoltage protection on the 45 V output of laptop AC/DC adapters after primary regulation. IC Role / Device Role / Timing Role: Standby TVS shunting excess energy during regulator fault or capacitor failure, preventing fire hazard. Use Value: UL 497B recognition (QVGQ2 file E136766) certifies suitability for end-product safety approvals in Class II power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45AHE3/52 | Same electrical specs and AEC-Q101 qualification; differs only in ordering suffix (HE3 vs. HE3/52 denotes tape-and-reel packaging variant). | No functional difference; identical performance and mounting. | Select SMBJ45AHE3/52 if sourcing from distributors using base-P/N-only inventory systems. |
| SMCJ45AHE3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating (2.5× higher surge capacity). | Used where higher single-event surge margin is required (e.g., outdoor telecom cabinets), accepting larger PCB area. | Choose SMCJ45AHE3/52 when system-level surge testing exceeds 600 W or when derating for extended lifetime is needed. |
Compared with SMBJ45CHE3/52, SMBJ45AHE3/52 offers identical protection performance in the same SMB footprint, while SMCJ45AHE3/52 trades compactness for 2.5× higher surge headroom - enabling design flexibility between space-constrained and high-reliability deployments.
Availability
SMBJ45CHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom DC feeders, and consumer power adapter outputs requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ45CHE3/52 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-volume surface-mount surge protection in automotive, industrial, and communications infrastructure - balancing compact size, AEC-Q101 compliance, and repeatable clamping performance across temperature.
FAQ
What is the clamping voltage of SMBJ45CHE3/52 at its rated peak pulse current?
The SMBJ45CHE3/52 has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the highest voltage imposed on the protected circuit during a standardized surge event and is confirmed in Vishay's datasheet Document Number 88392, page 2.
Is SMBJ45CHE3/52 qualified for automotive applications?
Yes, SMBJ45CHE3/52 is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification validates its reliability under automotive-grade temperature cycling, mechanical shock, and humidity testing - making it suitable for engine control, body electronics, and ADAS subsystems.
What does the "/52" suffix mean in SMBJ45CHE3/52?
The "/52" suffix in SMBJ45CHE3/52 specifies packaging: 750 units per 7-inch diameter plastic tape-and-reel. This format is optimized for high-speed SMT placement equipment and aligns with industry-standard JEDEC carrier dimensions for SMB (DO-214AA) devices.
How does SMBJ45CHE3/52 differ from bidirectional variants like SMBJ45CHE3/52CA?
SMBJ45CHE3/52 is unidirectional and protects against positive-going transients only, with polarity marked by a cathode band. Bidirectional versions (e.g., SMBJ45CHE3/52CA) suppress surges in both directions and lack polarity marking - used where AC-coupled or differential signal lines require symmetrical clamping.
What is the maximum operating temperature for SMBJ45CHE3/52?
The SMBJ45CHE3/52 has a maximum junction temperature (TJ max) of +150 °C and an operating storage temperature range of –55 °C to +150 °C. Its thermal resistance (RθJA) is 100 °C/W, so PCB layout with adequate copper pour is essential to maintain safe junction temperatures under sustained power dissipation.
SMBJ45CHE3/52 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 80.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SMBJ45CHE3/52 FAQ
1.How can I place an order for SMBJ45CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CHE3/52 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 SMBJ45CHE3/52 reliable?
The price and inventory of SMBJ45CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ45CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CHE3/52?
SMBJ45CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CHE3/52 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 SMBJ45CHE3/52?
For technical support, including SMBJ45CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CHE3/52 requirements.
6.How does Aetrix verify that SMBJ45CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ45CHE3/52 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 SMBJ45CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ45CHE3/52?
All SMBJ45CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CHE3/52, 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 SMBJ45CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ45CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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