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Vishay General Semiconductor - Diodes Division SMBJ45CHE3/5B
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- Part No.:
- SMBJ45CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CHE3/5B.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,604
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Product details
Overview
SMBJ45CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 SMBJ45CHE3/5B datasheet, SMBJ45CHE3/5B pinout, SMBJ45CHE3/5B application, or SMBJ45CHE3/5B equivalent, key selection criteria include clamping performance under 8.3 A surge, unidirectional polarity for DC rail protection, AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 45 V, it avalanches into low-impedance conduction to divert transient energy away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
The device delivers 72.7 V clamping at 8.3 A (10/1000 µs), with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C. The cathode band marking identifies polarity, and the matte tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail protection threshold. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 72.7 V at 8.3 A - Measured clamping voltage under 10/1000 µs surge; limits stress on protected circuitry during transients. |
| PPPM | 600 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates survivability during high-energy fault events. |
| TJ max. | +150 °C - Maximum junction temperature; enables deployment in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.130" footprint; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during surge events. |
| Cathode | Protected line connection / transient sensing node | Connected to the line being protected (e.g., 45 V supply rail); avalanche conduction initiates here when VWM is exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors; meets stress test requirements for temperature cycling, HTRB, and ESD. |
| 600 W peak pulse power (10/1000 µs) | Provides immunity to high-energy transients per ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs). |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA at VWM) over lifetime and temperature (-55 °C to +150 °C). |
| MSL Level 1 (J-STD-020) | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; eliminates bake requirement prior to assembly. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 suffix adds halogen-free molding compound - satisfies automotive OEM material declarations (IMDS, ELV). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 45 V battery-supplied ECUs from load dump and alternator transients in 24 V commercial vehicle systems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and chassis ground to clamp surges above 45 V. Use Value: Limits peak voltage to ≤72.7 V during 8.3 A transients, preventing damage to MCU power inputs and CAN transceivers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors connected to 45 V industrial PLC I/O modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor signal lines to suppress ESD and inductive kickback from solenoid drivers. Use Value: Clamps fast transients within nanoseconds while maintaining <1.0 µA leakage at 45 V, preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Securing 45 V DC input rails of telecom remote radio units exposed to lightning-induced surges on outdoor power feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and PMICs. Use Value: Absorbs 600 W pulses without degradation, meeting GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in smart washing machine motor control boards from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on 45 V auxiliary supply feeding motor driver ICs and optocouplers. Use Value: Fast response time and low clamping voltage prevent false triggering and latch-up in logic-level circuits during brushless motor switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45AHE3/5B | Same electrical specs and AEC-Q101 qualification; differs only in base P/N suffix formatting (no 'C' in part number - confirms unidirectional variant). | No functional difference; identical use cases in automotive and industrial power rail protection. | Select SMBJ45AHE3/5B if sourcing from distributors listing the base family without 'C' suffix; electrically interchangeable. |
| SMCJ45AHE3/5B | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (13.3 A). | Better suited for higher-energy surge environments (e.g., main AC/DC input stages); requires larger PCB footprint and thermal relief. | Choose SMCJ45AHE3/5B when system-level surge testing exceeds 600 W requirements or when board space allows larger package for margin. |
Compared with SMBJ45CHE3/5B, SMBJ45AHE3/5B offers identical protection performance in the same SMB footprint, while SMCJ45AHE3/5B trades compactness for 2.5× higher surge capacity - enabling design flexibility between space-constrained and high-robustness implementations.
Availability
SMBJ45CHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ45CHE3/5B 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, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where precise clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ45CHE3/5B at its rated peak pulse current?
The SMBJ45CHE3/5B has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet revision 09-Jan-2024 (Document Number: 88392), ensuring predictable overvoltage limiting for protected circuits during surge events. The SMBJ45CHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ45CHE3/5B qualified for automotive applications?
Yes, SMBJ45CHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified variants). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification to meet automotive reliability standards. The SMBJ45CHE3/5B is routinely deployed in engine control units, body electronics, and ADAS sensor modules where transient immunity and long-term stability are critical.
What does the "HE3/5B" suffix mean in SMBJ45CHE3/5B?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification; "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format aligns with Vishay's standardized ordering nomenclature documented in the SMBJ5.0A–SMBJ188A datasheet (Section "ORDERING INFORMATION"). The SMBJ45CHE3/5B thus combines automotive-grade reliability with high-volume SMT-ready packaging.
How does SMBJ45CHE3/5B differ from bidirectional TVS diodes like SMBJ45CHE3/5B?
SMBJ45CHE3/5B is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR, making it ideal for DC rail protection. Bidirectional variants (e.g., SMBJ45CHE3/5B with "CA" suffix) conduct symmetrically in both directions and lack polarity marking - used for AC lines or differential signal protection. The SMBJ45CHE3/5B's unidirectional behavior ensures zero forward voltage drop during normal operation and avoids unintended conduction on positive-going transients.
What is the thermal resistance of SMBJ45CHE3/5B, and how does it affect PCB layout?
The SMBJ45CHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads. To maintain TJ ≤ 150 °C under sustained 5.0 W power dissipation, designers must provide adequate copper area and avoid thermal bottlenecks. The SMBJ45CHE3/5B datasheet explicitly references this pad layout for all ratings - deviating reduces surge endurance and long-term reliability.
SMBJ45CHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMBJ45CHE3/5B FAQ
1.How can I place an order for SMBJ45CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CHE3/5B 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 SMBJ45CHE3/5B reliable?
The price and inventory of SMBJ45CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ45CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CHE3/5B?
SMBJ45CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CHE3/5B 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 SMBJ45CHE3/5B?
For technical support, including SMBJ45CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CHE3/5B requirements.
6.How does Aetrix verify that SMBJ45CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ45CHE3/5B 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 SMBJ45CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ45CHE3/5B?
All SMBJ45CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CHE3/5B, 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 SMBJ45CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ45CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CHE3/5B Tags
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