My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ45HE3/52
;;2.jpg)
- Part No.:
- SMBJ45HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45HE3/52.pdf
- Description:
- TVS DIODE 45VWM 80.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ45HE3/52 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 ESD, lightning-induced surges, and inductive switching transients. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1.0 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 on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ45HE3/52 datasheet, SMBJ45HE3/52 pinout, SMBJ45HE3/52 application, or SMBJ45HE3/52 equivalent, this device is selected for robust overvoltage protection in automotive-grade embedded systems, industrial I/O modules, and telecom interface circuits where AEC-Q101 qualification, low clamping ratio, and MSL Level 1 solderability are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA leakage at 45 V), then rapidly avalanches below 55.3 V to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive transient stress.
The SMBJ45HE3/52 is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling operation up to +150 °C junction temperature with appropriate PCB copper pad layout (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 45 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 50.0–55.3 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients without premature conduction. |
| VC (Clamping Voltage) | 72.7 V at 8.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables safe margin for 48 V systems. |
| PPPM (Peak Pulse Power) | 600 W - Sustained surge energy handling capability per single 10/1000 µs event; supports IEC 61000-4-5 Level 3/4 compliance. |
| IPPM (Peak Pulse Current) | 8.3 A - Maximum non-repetitive surge current the device can safely clamp; derived directly from VC and PPPM. |
| TJmax | +150 °C - Maximum junction temperature; allows use in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased terminal / Protection node | Connected to protected line (e.g., 48 V rail or RS-485 bus); conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces requiring extended temperature and reliability validation. |
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe transients per ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs). |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during clamping - critical for safeguarding 48 V-rated MOSFETs and microcontrollers with tight absolute maximum ratings. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over time and temperature - essential for long-life industrial deployments. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48 V DC Power Rail |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and relay driver outputs from load dump and inductive kickback in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between LIN line and ground, clamping transients within 1 ns response time. Use Value: Prevents latch-up or permanent damage to LIN transceivers (e.g., TJA1020) during 12 V system load dump events up to 35 V sustained and 60 V spikes. |
Use Scenario: Safeguarding PMIC inputs and buck converter enable lines in factory automation PLCs powered from 48 V distributed supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V input rail, absorbing repetitive switching surges from solenoid drivers and motor controllers. Use Value: Maintains system uptime by limiting rail voltage excursions to ≤72.7 V, well below 80 V absolute max ratings of common 48 V-input DC/DC controllers. |
| Telecom Remote Radio Unit (RRU) Interface | Smart Sensor Node Signal Line |
|
Use Scenario: Shielding RS-485 communication ports on outdoor base station equipment from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each differential line (A/B) referenced to local ground plane, with coordinated layout for balanced clamping. Use Value: Achieves >20 kV ESD contact immunity (IEC 61000-4-2) and 4 kV surge immunity (IEC 61000-4-5) without signal distortion or data corruption. |
Use Scenario: Protecting analog output (0–10 V / 4–20 mA) and digital I²C lines of environmental sensors in HVAC control panels. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA at 45 V) TVS placed at connector entry point, minimizing impact on precision signal integrity. Use Value: Preserves measurement accuracy while blocking fast transients from building management system wiring faults or nearby relay switching noise. |
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-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package. | Lacks automotive qualification; suitable for industrial/commercial designs without automotive lifecycle or reliability requirements. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SMAJ45AHE3/A | Lower peak pulse power (400 W vs. 600 W); SMA (DO-214AC) package with smaller footprint and higher thermal resistance (140 °C/W). | Reduced surge handling margin; limited to lower-energy transients or space-constrained layouts where 600 W is not required. | Choose only if board area is critical and surge threat level is confirmed ≤400 W per IEC 61000-4-5. |
Compared with SMBJ45A-E3/52, the SMBJ45HE3/52 adds AEC-Q101 qualification for automotive use without electrical trade-offs; versus SMAJ45AHE3/A, it delivers 50 % higher surge power handling and superior thermal performance in the larger SMB package - making it the preferred choice for mission-critical 48 V system protection.
Availability
SMBJ45HE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial 48 V power distribution, and telecom interface protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ45HE3/52 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, efficiency, and application-specific performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior, AEC-Q101 compliance, and robust surge endurance are mandatory.
FAQ
What is the clamping voltage of SMBJ45HE3/52 at its rated peak pulse current?
The SMBJ45HE3/52 has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on the protected circuit during a worst-case transient event. The SMBJ45HE3/52 maintains this clamping performance across its qualified operating temperature range.
Is SMBJ45HE3/52 suitable for automotive applications?
Yes, SMBJ45HE3/52 is AEC-Q101 qualified and specifically designed for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and validated performance from −55 °C to +150 °C. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified versions - making SMBJ45HE3/52 appropriate for body control modules, ADAS sensor interfaces, and infotainment power rails.
How does SMBJ45HE3/52 differ from SMBJ45A-E3/52?
The SMBJ45HE3/52 and SMBJ45A-E3/52 share identical electrical specifications (VWM, VBR, VC, PPPM) and SMB package, but differ in qualification: SMBJ45HE3/52 is AEC-Q101 qualified for automotive applications, whereas SMBJ45A-E3/52 is commercial-grade only. Both are RoHS-compliant, but only SMBJ45HE3/52 meets the extended reliability and testing requirements for automotive deployment.
What is the maximum reverse leakage current of SMBJ45HE3/52 at its stand-off voltage?
The SMBJ45HE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 45 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss and no interference with upstream voltage regulation or sensing circuits - a key requirement for battery-powered and precision analog systems using SMBJ45HE3/52.
Can SMBJ45HE3/52 be used in bidirectional protection configurations?
No, SMBJ45HE3/52 is a unidirectional TVS diode and is not rated for bidirectional operation. For bidirectional transient suppression, Vishay specifies parts with "CA" suffix (e.g., SMBJ45CA). Using SMBJ45HE3/52 in reverse-bias beyond its specified parameters risks degradation or failure. Always verify polarity alignment: cathode must connect to the protected line, anode to ground, as defined in the SMBJ45HE3/52 datasheet.
SMBJ45HE3/52 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:
- 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)
SMBJ45HE3/52 FAQ
1.How can I place an order for SMBJ45HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45HE3/52 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 SMBJ45HE3/52 reliable?
The price and inventory of SMBJ45HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ45HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ45HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45HE3/52?
SMBJ45HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45HE3/52 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 SMBJ45HE3/52?
For technical support, including SMBJ45HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45HE3/52 requirements.
6.How does Aetrix verify that SMBJ45HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ45HE3/52 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 SMBJ45HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ45HE3/52?
All SMBJ45HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45HE3/52, 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 SMBJ45HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ45HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45HE3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
