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Vishay General Semiconductor - Diodes Division SMBJ43AHE3/5B
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- Part No.:
- SMBJ43AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHE3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,848
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Product details
Overview
SMBJ43AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. 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 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ43AHE3/5B datasheet, SMBJ43AHE3/5B pinout, SMBJ43AHE3/5B application, or SMBJ43AHE3/5B equivalent, key selection criteria include its AEC-Q101 qualification status, low 0.102 %/°C VBR temperature coefficient, 1.0 µA max reverse leakage at VWM, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This unidirectional TVS operates as a voltage-clamping device triggered by overvoltage events exceeding its VWM of 43 V, with rapid avalanche breakdown initiating within <1 ps. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 µs surges at 0.01% duty cycle.
The device is rated for TJ = –55 °C to +150 °C operation, with thermal resistance RθJA = 100 °C/W (on recommended pad layout) and RθJL = 20 °C/W, supporting reliable energy dissipation during transient events without thermal runaway under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC bias margin for protected circuitry. |
| VBR @ IT = 1 mA | 47.8–52.8 V - Breakdown voltage range confirming tight ±5% tolerance; ensures predictable turn-on threshold across production lots. |
| VC @ IPPM = 8.6 A | 69.4 V - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges (4 kV line-to-line). |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of rectifier-stage inputs in AC/DC converters. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive modules and high-ambient industrial controllers. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with JEDEC J-STD-020 MSL level 1 reflow profiles (260 °C peak). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration; enables surge current shunting to reference plane. |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to protected line (e.g., 43 V rail or signal trace); avalanche breakdown occurs when cathode-to-anode voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power rails. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV without degradation; eliminates need for external series impedance in many designs. |
| Glass passivated junction | Ensures stable VBR over time and temperature; reduces parameter drift in long-life industrial equipment operating at elevated ambient temperatures. |
| Low 1.0 µA max reverse leakage @ VWM | Minimizes standby power loss in battery-backed systems and high-impedance sensor interfaces where leakage could affect accuracy or drain capacity. |
| MSL level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates baking requirement and streamlines SMT line integration. |
Applications
| Industrial Motor Drives | Automotive Power Distribution Units |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive kickback from 24 V solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes to ≤69.4 V during MOSFET turn-off, preventing latch-up or oxide damage. Use Value: Enables direct connection of logic-level controllers to inductive loads without additional RC snubbers or isolation, reducing BOM count and PCB area. |
Use Scenario: Surge suppression on 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Fast-acting voltage clamp absorbing >400 W pulses within nanoseconds, holding rail voltage below 70 V during 100 ms overvoltage events. Use Value: Meets AEC-Q101 requirements while maintaining system uptime during harsh automotive electrical environments - no reset or brownout required. |
| Telecom Power Supply Inputs | Consumer Sensor Interface Protection |
|
Use Scenario: Input stage protection for 48 V PoE-powered switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC/DC converter, limiting input voltage to safe levels before regulation. Use Value: Provides 600 W pulse handling without derating at 70 °C ambient, eliminating need for parallel TVS devices or oversized heatsinking. |
Use Scenario: ESD protection for analog output lines of MEMS pressure sensors in smart home thermostats. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) unidirectional clamp preserving signal integrity while diverting 8 kV HBM ESD strikes away from precision amplifier inputs. Use Value: Maintains sensor offset error <10 µV and enables full 16-bit ADC resolution without post-calibration due to minimal DC loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHM3/5B | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | Required for RoHS-compliant, halogen-free manufacturing programs (e.g., EU automotive Tier 1 supply chain). | Select when compliance with IEC 61249-2-21 or JPCA-ES-01-2015 is mandated; no design or layout changes needed. |
| SMAJ43AHE3/A | Lower 400 W PPPM, higher VC = 72.7 V at 7.5 A, SMA package (smaller footprint, higher RθJA = 140 °C/W). | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD) or space-constrained consumer PCBs where 600 W headroom is not required. | Choose only if board area is critical and surge threat level is limited to Class 3 ESD; verify thermal margin with actual copper pour. |
Compared with SMBJ43AHM3/5B, SMBJ43AHE3/5B offers identical protection performance with standard RoHS compliance but excludes halogen-free certification; versus SMAJ43AHE3/A, it delivers 50% higher surge power handling and lower clamping voltage in a thermally superior package - critical for industrial and automotive deployments.
Availability
SMBJ43AHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution units, telecom power supply inputs, and consumer sensor interface protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ43AHE3/5B 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, low-clamping transient protection in compact surface-mount packages for automotive, industrial, and telecom infrastructure - balancing surge robustness, thermal performance, and manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ43AHE3/5B at its rated peak pulse current?
The SMBJ43AHE3/5B has a maximum clamping voltage (VC) of 69.4 V at its rated peak pulse current (IPPM) of 8.6 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ43AHE3/5B maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ43AHE3/5B suitable for automotive applications?
Yes, SMBJ43AHE3/5B is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD qualification per ISO 10605. The SMBJ43AHE3/5B is deployed in power distribution units, body control modules, and ADAS subsystems where sustained reliability under vibration, thermal shock, and load dump conditions is mandatory.
What is the reverse leakage current specification for SMBJ43AHE3/5B at its stand-off voltage?
The SMBJ43AHE3/5B specifies a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 43 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss in always-on circuits and preserves accuracy in high-impedance sensor front-ends. Leakage remains below 5 µA up to +85 °C, supporting stable operation in sealed enclosures without active cooling.
Does SMBJ43AHE3/5B have a bidirectional version, and how does it differ?
No, SMBJ43AHE3/5B is unidirectional only, indicated by the "A" suffix. Its bidirectional counterpart is SMBJ43CAHE3/5B ("CA" suffix), which provides symmetrical clamping in both directions with identical VWM and VC ratings. The SMBJ43AHE3/5B uses a cathode band for polarity identification and is optimized for DC-biased lines like power rails, whereas SMBJ43CAHE3/5B suits AC-coupled signal paths such as RS-485 or CAN bus lines where polarity reversal occurs.
What is the thermal resistance of SMBJ43AHE3/5B, and how does it impact layout design?
The SMBJ43AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no internal layer copper and defines the required PCB copper area to maintain TJ ≤ 150 °C during repetitive surge events. To improve thermal performance, designers should extend copper pours beyond the pad dimensions and consider internal ground/power planes connected via multiple vias - especially for high-duty-cycle applications.
SMBJ43AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
SMBJ43AHE3/5B FAQ
1.How can I place an order for SMBJ43AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHE3/5B 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 SMBJ43AHE3/5B reliable?
The price and inventory of SMBJ43AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHE3/5B?
SMBJ43AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHE3/5B 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 SMBJ43AHE3/5B?
For technical support, including SMBJ43AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHE3/5B requirements.
6.How does Aetrix verify that SMBJ43AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHE3/5B 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 SMBJ43AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43AHE3/5B?
All SMBJ43AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHE3/5B, 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 SMBJ43AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ43AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43AHE3/5B Tags
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