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Vishay General Semiconductor - Diodes Division SMBJ43A-E3/52
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- Part No.:
- SMBJ43A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43A-E3/52.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:567
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Product details
Overview
SMBJ43A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of DC power rails 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 - deployed in industrial motor drives, automotive body control modules, and telecom interface protection.
For engineers reviewing the SMBJ43A-E3/52 datasheet, SMBJ43A-E3/52 pinout, SMBJ43A-E3/52 application, or SMBJ43A-E3/52 equivalent, key selection criteria include clamping performance under 8.6 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and SMB (DO-214AA) package compatibility with automated SMT placement.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive transients.
Designed for single-polarity DC systems, SMBJ43A-E3/52 exhibits 1.0 µA max reverse leakage at 43 V, 0.102 %/°C temperature coefficient of VBR, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - confirming suitability for high-volume commercial PCB assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line nominal voltage. |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage with margin. |
| VC @ IPPM | 69.4 V at 8.6 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; supports common IEC 61000-4-5 Level 3/4 surge immunity requirements. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - Low-profile SMD outline with cathode band marking; compatible with JEDEC-standard pick-and-place and reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by molded band. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), 0.106 g unit weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes shunt path during transient event. |
| Cathode | High-side connection point | Connected to protected line (e.g., +43 V rail); band-marked end identifies polarity for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge test levels up to 4 kV (line-earth) in properly designed layouts. |
| Glass passivated chip junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime - critical for long-term field reliability. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement; supports standard lead-free reflow processes without moisture-induced delamination risk. |
| RoHS-compliant, matte tin plated leads | Meets J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 - ensures consistent solder joint integrity. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns), improving protection margin for sensitive CMOS inputs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 42 V battery-supplied microcontroller I/O and CAN transceiver power rails against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between VCC and GND, triggered within <1 ns to limit transient overvoltage to ≤69.4 V. Use Value: Prevents latch-up or gate oxide damage in 48 V-rated MCUs and transceivers during 12 V/42 V dual-battery system transients. |
Use Scenario: Input protection for LIN bus transceivers and door module power supplies exposed to ISO 7637-2 pulse 1, 2a, and 5a. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across supply pins to absorb repetitive 100–200 V, 50 ms surges without degradation. Use Value: Maintains functional safety integrity by limiting voltage excursion below 70 V during 100+ surge events over product lifetime. |
| Telecom Interface Circuits | Consumer Power Adapters |
|
Use Scenario: Secondary-side DC output protection in PoE-powered switches and base station RF front-end bias supplies. IC Role / Device Role / Timing Role: Fast-response clamp on regulated 48 V or 57 V outputs, coordinated with upstream OVP and current limiting. Use Value: Reduces need for oversized capacitors or redundant regulators by holding output within safe operating area during lightning-induced surges. |
Use Scenario: Overvoltage suppression on USB-C PD 20 V / 28 V / 48 V output rails in multi-port adapters subject to hot-plug and cable ESD. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC bus, sized to clamp 600 W surges without thermal runaway. Use Value: Enables compact adapter designs by replacing bulkier MOV-based solutions while meeting UL 62368-1 transient withstand requirements. |
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-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; selected where halogen-free material compliance is mandated. | Choose for environmental compliance programs requiring halogen-free bill-of-materials. |
| SMCJ43A-E3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM. | Higher surge capacity suits higher-energy threat environments (e.g., outdoor telecom cabinets), but requires larger PCB footprint. | Choose when system-level surge testing exceeds 600 W or when design margin demands >2× energy handling. |
Compared with SMBJ43A-E3/52, SMBJ43A-M3/52 offers identical protection performance with halogen-free construction, while SMCJ43A-E3/52 provides 2.5× peak power handling in a physically larger package - enabling trade-offs between board space, environmental compliance, and surge energy margin.
Availability
SMBJ43A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom interface circuits requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ43A-E3/52 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 readiness are essential.
FAQ
What is the maximum clamping voltage of SMBJ43A-E3/52 under a 10/1000 µs surge?
The SMBJ43A-E3/52 has a maximum clamping voltage (VC) of 69.4 V when subjected to its rated peak pulse current of 8.6 A using the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay Document 88392 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ43A-E3/52 suitable for automotive applications?
SMBJ43A-E3/52 is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes (e.g., SMBJ43AHE3_B); the -E3/52 variant is commercial-grade and not AEC-Q101 certified. For automotive use, specify SMBJ43AHE3_B/H or SMBJ43AHM3_B/H to ensure qualification for under-hood and body electronics applications per the AEC-Q101 stress test standard.
What does the "E3/52" suffix indicate in SMBJ43A-E3/52?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/52" specifies packaging in 7″ diameter plastic tape and reel, with a base quantity of 750 units per reel. This ordering code aligns with Vishay's standard delivery format for high-volume SMT assembly and ensures compatibility with automated pick-and-place equipment.
How does SMBJ43A-E3/52 differ from bidirectional variants like SMBJ43CA?
SMBJ43A-E3/52 is unidirectional and intended for DC line protection with defined polarity (cathode marked), whereas SMBJ43CA is bidirectional and used in AC or floating signal paths. The unidirectional version offers lower leakage (<1.0 µA at 43 V) and supports forward surge current (IFSM = 100 A), making SMBJ43A-E3/52 appropriate for power rail clamping where polarity is fixed and surge direction is known.
What is the thermal resistance and derating behavior of SMBJ43A-E3/52?
SMBJ43A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2″ × 0.2″ copper pads. Its peak pulse power must be derated linearly above 25 °C ambient per Figure 2 in Document 88392 - e.g., at 75 °C ambient, maximum usable PPPM drops to ~400 W. This derating ensures safe operation without thermal runaway during repetitive surge events.
SMBJ43A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ43A-E3/52 FAQ
1.How can I place an order for SMBJ43A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43A-E3/52 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 SMBJ43A-E3/52 reliable?
The price and inventory of SMBJ43A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ43A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43A-E3/52?
SMBJ43A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43A-E3/52 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 SMBJ43A-E3/52?
For technical support, including SMBJ43A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43A-E3/52 requirements.
6.How does Aetrix verify that SMBJ43A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ43A-E3/52 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 SMBJ43A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ43A-E3/52?
All SMBJ43A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43A-E3/52, 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 SMBJ43A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ43A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43A-E3/52 Tags
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