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Vishay General Semiconductor - Diodes Division SMBJ43AHE3/52
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- Part No.:
- SMBJ43AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43AHE3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,224
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Product details
Overview
SMBJ43AHE3/52 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 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ43AHE3/52 datasheet, SMBJ43AHE3/52 pinout, SMBJ43AHE3/52 application, or SMBJ43AHE3/52 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 °C to +150 °C), and compliance with UL 497B for telecom and automotive electronics protection.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its reverse stand-off voltage (VWM = 43 V). Its silicon avalanche junction provides sub-nanosecond response time and low dynamic impedance during transient suppression.
The device is rated for 600 W peak pulse power (10/1000 µs waveform) with 0.01 % duty cycle, derated above 25 °C per Fig. 2, and supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine). Its glass-passivated chip junction ensures stable leakage performance (<1.0 µA at VWM) and long-term reliability under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 36–48 V DC rails. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Confirmed breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage seen by protected circuit during worst-case 10/1000 µs surge; limits downstream stress. |
| PPPM | 600 W - Peak transient energy absorption capability under standardized 10/1000 µs waveform; enables robust IEC 61000-4-5 Level 4 compliance. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial ambient environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when Vreverse > VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surges up to 4 kV (line-earth) without cascaded stages. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics where field failure risk must be minimized. |
| Low incremental surge resistance | Ensures minimal voltage overshoot during fast transients, critical for protecting 3.3 V/5 V logic-level interfaces. |
| MSL Level 1 (260 °C reflow) | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements. |
| UL 497B recognized (QVGQ2) | Meets safety certification for telecom and data line protectors, reducing system-level compliance effort. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Lines |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to limit transient excursions below 70 V. Use Value: Prevents damage to upstream DC-DC controllers and downstream 3.3 V microcontrollers during 12 V/24 V/48 V system transients. |
Use Scenario: CAN_H/CAN_L differential pair in vehicle BCM subjected to ISO 7637-2 Pulse 1/2a/5a surges. IC Role / Device Role / Timing Role: Dual-SMBJ configuration (one per line) referenced to battery ground, clamping common-mode spikes within 100 ns. Use Value: Maintains CAN signal integrity below 5 V differential swing while surviving 100 V/500 ms load dump events. |
| Telecom DSL Line Interface Protection | Industrial Sensor Signal Conditioning Front-End |
|
Use Scenario: Analog front-end of ADSL/VDSL line card receiving signals from outside plant wiring prone to lightning-induced surges. IC Role / Device Role / Timing Role: SMBJ43AHE3/52 placed on tip/ring lines ahead of transformer coupling, referenced to isolated ground. Use Value: Limits induced transients to <70 V before reaching transformer primary, preserving isolation barrier integrity and preventing core saturation. |
Use Scenario: 4–20 mA current loop transmitter connected to pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS installed across loop supply terminals (24 V rail to ground) to absorb ESD and relay coil kickback. Use Value: Ensures loop accuracy remains within ±0.1% full scale after 8 kV contact ESD per IEC 61000-4-2, avoiding calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHM3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is required for final product certification. | Direct material substitution where halogen content restrictions apply (e.g., EU WEEE, Japan JIS C 0950). |
| SMCJ43AHE3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge energy handling (>600 W) or improved thermal dissipation is needed in space-permitting designs. | Choose when board layout allows larger footprint and system-level surge tests exceed 600 W single-pulse requirement. |
Compared with SMBJ43AHE3/52, SMBJ43AHM3/52 offers identical protection performance with halogen-free construction, while SMCJ43AHE3/52 trades compact size for 2.5× higher pulse power and better thermal management-enabling design flexibility across cost, space, and ruggedness constraints.
Availability
SMBJ43AHE3/52 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line interfaces, and sensor signal conditioning circuits requiring stable component supply with AEC-Q101 validation and UL recognition.
Supply support for SMBJ43AHE3/52 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 high-reliability and automotive-grade solutions.
The SMBJ series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications including automotive ECUs, industrial PLCs, and telecom infrastructure equipment.
FAQ
What is the maximum clamping voltage of SMBJ43AHE3/52 under a 10/1000 µs surge?
The SMBJ43AHE3/52 has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 8.6 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry will not experience reverse voltages exceeding 69.4 V during standardized surge events, making SMBJ43AHE3/52 suitable for safeguarding 48 V nominal systems.
Is SMBJ43AHE3/52 qualified for automotive applications?
Yes, SMBJ43AHE3/52 carries AEC-Q101 qualification, confirmed in Vishay's official documentation (Document Number: 88392, Revision: 09-Jan-2024). This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness-validating SMBJ43AHE3/52 for use in automotive body control modules, infotainment power rails, and ADAS sensor interfaces where field reliability is critical.
How does the thermal resistance of SMBJ43AHE3/52 affect PCB layout?
SMBJ43AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain junction temperature below 150 °C during repetitive surges, designers must ensure adequate copper area and avoid thermal bottlenecks-such as narrow traces or insufficient vias-near SMBJ43AHE3/52's cathode and anode pads, especially in high-duty-cycle industrial applications.
What is the reverse leakage current specification for SMBJ43AHE3/52 at its stand-off voltage?
At its rated reverse stand-off voltage (VWM = 43 V) and TA = 25 °C, SMBJ43AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in always-on 48 V systems and prevents false triggering or battery drain in automotive standby modes, directly supporting SMBJ43AHE3/52's role in energy-sensitive protection schemes.
Can SMBJ43AHE3/52 be used in bidirectional configurations?
No-SMBJ43AHE3/52 is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMBJ43CA). Using SMBJ43AHE3/52 in reverse-biased configurations risks permanent damage due to lack of symmetrical avalanche structure; correct selection requires verifying polarity alignment in the schematic and layout for SMBJ43AHE3/52.
SMBJ43AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMBJ43AHE3/52 FAQ
1.How can I place an order for SMBJ43AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43AHE3/52 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 SMBJ43AHE3/52 reliable?
The price and inventory of SMBJ43AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43AHE3/52?
SMBJ43AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43AHE3/52 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 SMBJ43AHE3/52?
For technical support, including SMBJ43AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43AHE3/52 requirements.
6.How does Aetrix verify that SMBJ43AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43AHE3/52 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 SMBJ43AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43AHE3/52?
All SMBJ43AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43AHE3/52, 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 SMBJ43AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ43AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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