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Vishay General Semiconductor - Diodes Division SMBJ45HE3/5B
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- Part No.:
- SMBJ45HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45HE3/5B.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMBJ45HE3/5B from Vishay General Semiconductor is a unidirectional 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ45HE3/5B datasheet, SMBJ45HE3/5B pinout, SMBJ45HE3/5B application, or SMBJ45HE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time. Its unidirectional configuration provides reverse-biased transient suppression while allowing forward conduction up to 3.5 V at 50 A.
The device is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, and supports repetitive surge handling when thermally managed on ≥5.0 mm × 5.0 mm copper pads per terminal. It meets MSL level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM | 600 W - Peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current tolerance. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal design limits for PCB layout and power derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; requires minimum 5.0 mm × 5.0 mm copper pad per lead for full rating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground during overvoltage event. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during reverse transient. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring long-term reliability under thermal cycling. |
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against lightning-induced surges and inductive switching spikes in industrial motor drives. |
| Glass passivated junction | Ensures stable leakage performance (<1.0 µA at VWM) and long-term stability under humidity and bias stress. |
| MSL Level 1 (260 °C peak reflow) | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements prior to placement. |
| UL 497B recognized (QVGQ2) | Meets safety standards for telecom and industrial surge protectors; simplifies end-equipment certification. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from relay coils and solenoid loads. IC Role / Device Role: Unidirectional shunt clamp placed between power rail and ground near sensitive logic inputs. Use Value: Limits transient voltage to ≤72.7 V during 8.3 A surges, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role: Primary overvoltage clamp on 12 V battery-fed subsystems with AEC-Q101 compliance requirement. Use Value: Withstands 100 A surge current and operates across –55 to +150 °C, meeting ISO 7637-2 Pulse 1/2/5a immunity requirements. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection on AC/DC adapters and PoE-powered equipment subjected to lightning-induced surges. IC Role / Device Role: First-line defense on primary-side DC bus before DC-DC converters and isolation barriers. Use Value: 600 W rating and 72.7 V clamping enable compliance with IEC 61000-4-5 (4 kV line-earth) without additional stages. |
Use Scenario: ESD and surge protection for touch panel controllers and MCU reset lines in washing machines and HVAC systems. IC Role / Device Role: Low-leakage (≤1.0 µA) unidirectional clamp on 3.3 V/5 V rails with minimal standby power impact. Use Value: Glass passivation and <0.1 µA typical leakage at 45 V ensure no measurable battery drain in always-on standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45A-E3/5B | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, identical SMB package and pinout. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ45A-E3/5B for cost-sensitive non-automotive applications requiring identical electrical performance. |
| SMAJ45AHE3/A | Lower 400 W PPPM, SMA (DO-214AC) package, 10% smaller footprint, higher RθJA (140 °C/W). | Reduced surge margin; requires tighter thermal design; not drop-in due to different pad layout and lower power rating. | Choose SMAJ45AHE3/A only if board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2. |
Compared with SMBJ45A-E3/5B, SMBJ45HE3/5B adds AEC-Q101 qualification without electrical trade-offs; versus SMAJ45AHE3/A, it delivers 50% higher surge power handling and superior thermal performance in the same mounting orientation but requires larger PCB area.
Availability
SMBJ45HE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMBJ45HE3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and repeatable clamping performance are critical.
FAQ
What is the clamping voltage of SMBJ45HE3/5B at its rated peak pulse current?
The SMBJ45HE3/5B 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 per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ45HE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ45HE3/5B suitable for automotive applications?
Yes, SMBJ45HE3/5B is AEC-Q101 qualified and specifically designated for automotive use with suffix "HE3". It undergoes stress testing for temperature cycling, humidity, and mechanical shock per AEC-Q101 Rev D, and is commonly deployed in body control modules, infotainment power rails, and sensor interface protection. The SMBJ45HE3/5B meets ISO 7637-2 requirements when applied with appropriate PCB layout.
What is the difference between SMBJ45HE3/5B and SMBJ45A-E3/5B?
The SMBJ45HE3/5B is AEC-Q101 qualified and rated for automotive use, whereas SMBJ45A-E3/5B is commercial-grade with identical electrical specifications (VWM = 45 V, VC = 72.7 V, PPPM = 600 W) and SMB package. Both share the same pinout and thermal characteristics, but SMBJ45HE3/5B includes extended reliability validation and traceability required for Tier 1 automotive supply chains.
Does SMBJ45HE3/5B have bidirectional capability?
No, SMBJ45HE3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ45CA). The SMBJ45HE3/5B conducts only in reverse breakdown mode and blocks forward voltage up to 3.5 V at 50 A; it must be oriented with cathode toward the protected line for proper operation.
What is the maximum operating temperature for SMBJ45HE3/5B?
The SMBJ45HE3/5B has a maximum junction temperature (TJ) of +150 °C and operates across –55 °C to +150 °C. Its thermal resistance is RθJA = 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. Derating begins above 25 °C ambient per Figure 2 in the datasheet, and the SMBJ45HE3/5B remains fully functional within this full industrial temperature envelope.
SMBJ45HE3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ45HE3/5B FAQ
1.How can I place an order for SMBJ45HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45HE3/5B 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 SMBJ45HE3/5B reliable?
The price and inventory of SMBJ45HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45HE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ45HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45HE3/5B?
SMBJ45HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45HE3/5B 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 SMBJ45HE3/5B?
For technical support, including SMBJ45HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45HE3/5B requirements.
6.How does Aetrix verify that SMBJ45HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ45HE3/5B 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 SMBJ45HE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ45HE3/5B?
All SMBJ45HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45HE3/5B, 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 SMBJ45HE3/5B part is unused and in its original packaging.
Return procedure for SMBJ45HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45HE3/5B Tags
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