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Vishay General Semiconductor - Diodes Division SMBJ43CHE3/5B
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- Part No.:
- SMBJ43CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CHE3/5B.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,546
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Product details
Overview
SMBJ43CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with a 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ43CHE3/5B datasheet, SMBJ43CHE3/5B pinout, SMBJ43CHE3/5B application, or SMBJ43CHE3/5B equivalent, key selection criteria include clamping performance under 8.6 A surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging a glass-passivated silicon junction to deliver sub-nanosecond response time and low incremental surge resistance. Its cathode-band polarity marking enables unambiguous orientation during PCB assembly, and it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance.
The device is rated for repetitive 600 W pulses at 0.01 % duty cycle and derates linearly above 25 °C ambient, with maximum junction temperature of +150 °C and storage range from –55 °C to +150 °C. It is RoHS-compliant and AEC-Q101 qualified - indicated by the "HE3" suffix - making it suitable for automotive powertrain and body electronics where reliability under transient stress is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC rail protection threshold. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 69.4 V at 8.6 A - clamped voltage during full 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling capability; supports high-energy transients from inductive switching or ESD events. |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against short-circuit faults. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs thermal design margin at 5.0 W steady-state dissipation. |
| TJ max. | +150 °C - maximum allowable junction temperature; sets upper limit for ambient + power loss design envelope. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by a band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration; carries surge current during clamping. |
| Cathode | Avalanche breakdown terminal | Marked with band; connected to protected line (e.g., 43 V rail); initiates clamping when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control units and ADAS power supplies. |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients from relay coil de-energization or load dump without degradation - critical for industrial PLC I/O protection. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping - preserves margin for downstream ICs rated to 70 V absolute maximum. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-induced damage - eliminates pre-bake requirement in high-volume SMT lines. |
| Glass-passivated junction | Provides stable leakage characteristics (<1 µA at VWM) and long-term parameter stability under thermal cycling - essential for 10+ year field deployments. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive Control |
|---|---|
|
Use Scenario: Protecting 48 V battery-supplied microcontrollers and CAN transceivers from load dump transients up to ±120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT rail and ground, clamping surges within 1 ns to limit voltage seen by downstream regulators. Use Value: Maintains system uptime by preventing latch-up or gate oxide rupture in 40 V-rated LDOs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in 3-phase inverter stages exposed to IGBT switching noise and back-EMF spikes. IC Role / Device Role / Timing Role: Mounted across DC-link capacitor terminals and across isolated signal lines feeding Hall-effect sensors. Use Value: Limits transient coupling into analog front-ends, reducing false zero-cross detection and improving torque control accuracy. |
| Telecom Line Interface Protection | Consumer Appliance Power Input Stage |
|
Use Scenario: Shielding Ethernet PHYs and PoE controllers from lightning-induced surges entering via RJ45 ports in outdoor base stations. IC Role / Device Role / Timing Role: Paired with common-mode chokes and gas discharge tubes in multi-stage protection networks on differential pairs. Use Value: Absorbs >90 % of 6 kV/3 kA combination wave energy before secondary protection triggers - extends system MTBF. |
Use Scenario: Suppressing switch-mode power supply turn-on spikes and relay contact bounce in smart washing machine main control boards. IC Role / Device Role / Timing Role: Placed across bulk capacitor inputs and across triac gate drive lines to prevent false triggering. Use Value: Eliminates field returns due to MCU resets caused by 100 V/10 µs transients on 230 V AC input rectifier outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/5B | Commercial-grade (non-AEC-Q101), identical electrical specs and package; lacks automotive qualification testing. | Approved for consumer/industrial use only; not permitted in automotive safety-critical modules per OEM requirements. | Select when cost sensitivity outweighs automotive qualification needs and lifecycle assurance is not mandated. |
| SMCJ43AHE3/5B | Same VWM/VC, but in larger SMC (DO-214AB) package; higher PPPM = 1500 W, RθJA = 50 °C/W. | Used where higher surge endurance is required (e.g., outdoor EV charging stations), but consumes 2.5× PCB area. | Choose when system-level surge test requirements exceed 600 W or thermal budget allows larger footprint. |
Compared with SMBJ43A-E3/5B, SMBJ43CHE3/5B adds AEC-Q101 validation for automotive deployment; versus SMCJ43AHE3/5B, it trades 900 W extra pulse power for 60 % smaller board space and tighter thermal constraints - enabling compact, qualified protection in space-constrained ECUs.
Availability
SMBJ43CHE3/5B is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor drives, and telecom infrastructure equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ43CHE3/5B 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 application-specific performance.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered for fast, repeatable clamping in harsh electromagnetic environments - targeting automotive, industrial, and communications systems where transient immunity is mission-critical.
FAQ
What is the clamping voltage of SMBJ43CHE3/5B at its rated peak pulse current?
The SMBJ43CHE3/5B has a maximum clamping voltage (VC) of 69.4 V at 8.6 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ43CHE3/5B maintains this clamping performance across its qualified temperature range and after repeated surge exposures.
Is SMBJ43CHE3/5B suitable for automotive applications?
Yes, SMBJ43CHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - meeting requirements for engine control, body electronics, and ADAS subsystems. The SMBJ43CHE3/5B is explicitly approved for automotive use where transient protection must comply with ISO 7637-2 and ISO 16750-2 standards.
What does the "5B" in SMBJ43CHE3/5B indicate?
The "5B" denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-speed automated pick-and-place assembly and is compatible with standard SMT feeders. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "SMBJ43CHE3/5B" as a whole uniquely identifies this qualified, reel-packed variant of the 43 V unidirectional TVS diode.
How does SMBJ43CHE3/5B compare to bidirectional TVS diodes like SMBJ43CHE3/5B?
SMBJ43CHE3/5B is unidirectional and intended for DC rail protection with defined polarity (cathode to protected line). Bidirectional variants such as SMBJ43CHE3/5B do not exist - the correct bidirectional counterpart is SMBJ43CHE3/5B with "CA" suffix (e.g., SMBJ43CHE3/5B is invalid; SMBJ43CHE3/5B would be SMBJ43CHE3/5B if bidirectional). Unidirectional devices offer lower leakage and tighter VBR tolerance than bidirectional types, making SMBJ43CHE3/5B optimal for asymmetric DC systems.
What is the thermal resistance of SMBJ43CHE3/5B, and how does it affect layout?
The SMBJ43CHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding internal ground planes reduces RθJA. For reliable operation at 5.0 W continuous dissipation, PCB layout must provide adequate copper area and airflow - otherwise junction temperature may exceed +150 °C, triggering thermal shutdown or parametric drift in the SMBJ43CHE3/5B.
SMBJ43CHE3/5B 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBJ43CHE3/5B FAQ
1.How can I place an order for SMBJ43CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CHE3/5B 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 SMBJ43CHE3/5B reliable?
The price and inventory of SMBJ43CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CHE3/5B?
SMBJ43CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CHE3/5B 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 SMBJ43CHE3/5B?
For technical support, including SMBJ43CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CHE3/5B requirements.
6.How does Aetrix verify that SMBJ43CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43CHE3/5B 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 SMBJ43CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43CHE3/5B?
All SMBJ43CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CHE3/5B, 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 SMBJ43CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ43CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CHE3/5B Tags
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