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Vishay General Semiconductor - Diodes Division SMBJ43A-E3/5B
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- Part No.:
- SMBJ43A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43A-E3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,885
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Product details
Overview
SMBJ43A-E3/5B 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, and clamps transients to ≤69.4 V at 8.6 A peak pulse current (IPPM) under 10/1000 µs waveform - used to safeguard MOSFETs, IC power rails, and sensor signal lines in industrial motor drives.
For engineers reviewing the SMBJ43A-E3/5B datasheet, SMBJ43A-E3/5B pinout, SMBJ43A-E3/5B application, or SMBJ43A-E3/5B equivalent, this device delivers verified 600 W peak pulse power, low incremental surge resistance, and AEC-Q101 qualification readiness - critical for automotive-grade ESD/surge hardening, DC power input protection, and I/O line transient suppression where fast response (<1 ns) and stable clamping are mandatory.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 43 V, it avalanches into low-impedance conduction to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown behavior across temperature (−55 °C to +150 °C).
The SMBJ43A-E3/5B is rated for 600 W peak pulse power (10/1000 µs), supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and exhibits a VBR temperature coefficient of +0.102 %/°C - enabling predictable performance drift compensation in thermal-aware designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 47.8 V / 52.8 V at IT = 1 mA - guaranteed avalanche onset range; sets minimum overvoltage threshold for reliable triggering. |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream components. |
| PPPM | 600 W - peak transient power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems. |
| IFSM | 100 A - single half-sine surge rating (8.3 ms); supports protection against inductive kickback in relay/valve driver circuits. |
| Junction Temp | −55 °C to +150 °C - extended thermal range allows deployment in under-hood automotive or industrial enclosures without derating. |
| Package | SMB (DO-214AA) - standardized SMT footprint with 5.21 mm × 4.06 mm body; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity - cathode marked by band on case end. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential rail; completes shunt path during avalanche conduction. |
| Cathode | Protected line interface | Connected to the line being protected (e.g., 24 V supply or sensor output); carries full surge current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial control inputs and automotive power modules. |
| Clamping voltage ≤69.4 V at 8.6 A | Limits voltage overshoot on 48 V nominal systems to <1.5× nominal, protecting 75 V-rated MOSFETs and LDOs without derating. |
| Low leakage: ≤1.0 µA at 43 V | Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks or battery-powered nodes. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free assembly without moisture sensitivity concerns or pre-bake requirements. |
| AEC-Q101 qualification path | Base P/NHE3 variant available - enables drop-in qualification for automotive body electronics and ADAS power domains. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC power input against load dump and inductive switching transients in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VIN and GND, triggered within <1 ns to clamp spikes above 43 V. Use Value: Prevents latch-up or gate oxide damage in upstream DC/DC controllers and downstream logic ICs during 100 V/50 ms load dump events. |
Use Scenario: Surge suppression on LIN bus transceiver power pins and wake-up lines in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-LIN VCC, clamping transients induced by battery disconnection or antenna coupling. Use Value: Maintains LIN physical layer integrity under ISO 7637-2 Pulse 5a (load dump) while adding <0.5 mm² PCB area vs. discrete Zener+capacitor solutions. |
| Telecom Power Feeds | Consumer Appliance Sensor Interfaces |
|
Use Scenario: Input protection for PoE-powered remote units exposed to lightning-induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: First-stage clamping device on primary DC input, coordinated with upstream MOVs and downstream π-filters. Use Value: Limits let-through energy to <10 mJ during 1 kV/500 Ω IEC 61000-4-5 surges, preserving reliability of isolated DC/DC converters and Ethernet PHYs. |
Use Scenario: ESD and EFT protection on NTC thermistor bias lines and Hall-effect rotor position sensor outputs in washing machine motor control boards. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) unidirectional TVS placed directly at connector entry point, referenced to system ground. Use Value: Passes IEC 61000-4-2 Level 4 (±8 kV contact) without signal distortion or baseline drift in 10-bit ADC readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-E3/5B | Bidirectional version; symmetric VBR = 47.8–52.8 V; same VC and PPPM. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD) where reverse polarity surges occur. | Select SMBJ43CA-E3/5B only when bidirectional clamping is mandated by signal topology - not a drop-in replacement for unidirectional use cases. |
| SMAJ43A-E3/52 | Same VWM/VBR specs but lower PPPM = 400 W; SMA (DO-214AC) package, smaller footprint (4.57 mm × 2.79 mm). | Suitable for space-constrained consumer electronics with lower surge threat levels (IEC 61000-4-5 Level 2). | Choose SMAJ43A-E3/52 only if board area is critical and 400 W rating suffices - not interchangeable due to reduced surge margin and different thermal resistance (RθJA = 140 °C/W). |
Compared with SMBJ43CA-E3/5B and SMAJ43A-E3/52, the SMBJ43A-E3/5B provides optimal balance of 600 W surge capacity, SMB package manufacturability, and unidirectional precision for 24–48 V DC power rail protection - making it the preferred choice for industrial and automotive power domain hardening where layout space permits and polarity is fixed.
Availability
SMBJ43A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, RoHS-compliant commercial-grade sourcing, and tape-and-reel delivery for SMT production.
Supply support for SMBJ43A-E3/5B 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, power efficiency, and AEC-Q qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where robustness, repeatable clamping, and long-term stability are non-negotiable.
FAQ
What is the maximum clamping voltage of the SMBJ43A-E3/5B under a 10/1000 µs surge?
The SMBJ43A-E3/5B clamps to a maximum of 69.4 V when subjected to its rated peak pulse current of 8.6 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024), and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the SMBJ43A-E3/5B RoHS-compliant and halogen-free?
Yes, the SMBJ43A-E3/5B carries the "E3" suffix, indicating it is RoHS-compliant and meets commercial-grade environmental specifications. It is not halogen-free - that designation applies to "M3" variants (e.g., SMBJ43A-M3/5B). The E3 version uses matte tin-plated leads and complies with JESD 201 Class 2 whisker resistance testing.
Can the SMBJ43A-E3/5B be used in automotive applications?
The SMBJ43A-E3/5B itself is commercial-grade; however, Vishay offers the AEC-Q101-qualified variant SMBJ43AHE3_B/I, which shares identical electrical specs and SMB packaging. For automotive deployment, specify the HE3 suffix version - the SMBJ43A-E3/5B may be used in non-safety-critical prototyping but lacks formal automotive qualification.
What is the thermal resistance of the SMBJ43A-E3/5B, and how does it affect power dissipation?
The SMBJ43A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation (PD) must be derated linearly - e.g., at 75 °C ambient, max continuous power drops to 2.5 W - ensuring junction temperature stays within the −55 °C to +150 °C operational limit.
How does the SMBJ43A-E3/5B differ from the SMBJ43CA-E3/5B?
The SMBJ43A-E3/5B is unidirectional (cathode-banded), while the SMBJ43CA-E3/5B is bidirectional with symmetrical breakdown in both polarities. Both share identical VWM = 43 V, VBR = 47.8–52.8 V, and VC = 69.4 V ratings, but the CA version is required for AC signals or polarity-agnostic protection - the A version cannot replace the CA version in bidirectional applications without risking failure.
SMBJ43A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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-E3/5B FAQ
1.How can I place an order for SMBJ43A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43A-E3/5B 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 SMBJ43A-E3/5B reliable?
The price and inventory of SMBJ43A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43A-E3/5B?
SMBJ43A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43A-E3/5B 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 SMBJ43A-E3/5B?
For technical support, including SMBJ43A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43A-E3/5B requirements.
6.How does Aetrix verify that SMBJ43A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43A-E3/5B 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 SMBJ43A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43A-E3/5B?
All SMBJ43A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43A-E3/5B, 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 SMBJ43A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ43A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43A-E3/5B Tags
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