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Vishay General Semiconductor - Diodes Division SMBJ43CA-E3/5B
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- Part No.:
- SMBJ43CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CA-E3/5B.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,100
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Product details
Overview
SMBJ43CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features 43 V standoff voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤69.4 V at 8.6 A peak surge current - used for protecting MOSFET gates, sensor interfaces, and industrial I/O lines against ESD and inductive switching spikes.
For engineers reviewing the SMBJ43CA-E3/5B datasheet, SMBJ43CA-E3/5B pinout, SMBJ43CA-E3/5B application, or SMBJ43CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, 69.4 V maximum clamping voltage at rated surge current, RoHS-compliant matte tin-plated terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protection element across two terminals with symmetrical avalanche behavior in both directions. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, while the SMB package provides thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
The SMBJ43CA-E3/5B complies with ANSI/IEEE C62.35 and meets UL 497B recognition (QVGQ2). It is rated for -55 °C to +150 °C operating junction temperature, supports repetitive 0.01% duty cycle surges, and exhibits a VBR temperature coefficient of +0.102 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤69.4 V at 8.6 A - clamping voltage under 600 W 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling per single transient event |
| IPPM | 8.6 A - maximum non-repetitive peak surge current supported at VC |
| TJ max. | +150 °C - maximum junction temperature enabling operation in industrial ambient environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts avalanche current in either direction when VWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay switching or motor commutation without degradation |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without pre-baking or special handling |
| Glass-passivated junction | Ensures stable VBR over time and improved reliability vs. epoxy-passivated alternatives |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module I/O |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from load-dump or ESD events in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal lines upstream of ADC inputs. Use Value: Limits transient voltage to ≤69.4 V, preventing latch-up or damage to 3.3 V/5 V precision front-end amplifiers and converters. |
Use Scenario: Safeguarding LIN bus or discrete switch inputs in body control modules exposed to battery transients and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Clamping device connected between signal line and ground or supply rail. Use Value: Withstands 600 W surges while maintaining <1 µA leakage at 43 V, preserving low-power sleep mode integrity. |
| Power Supply Rail Protection | Communication Port Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression on 48 V DC distribution rails feeding PLC I/O cards. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to clamp switching spikes from adjacent SMPS stages. Use Value: 43 V VWM aligns with 48 V nominal rail; 69.4 V clamping avoids triggering downstream undervoltage lockout. |
Use Scenario: Protecting RS-485 transceiver pins against lightning-induced surges in building automation networks. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair (A/B) and to ground. Use Value: Symmetrical clamping ensures equal protection for both polarities of differential signaling without signal inversion risk. |
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-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No functional difference; selected where halogen-free compliance is mandated by OEM or regional regulations | Direct material substitution when halogen-free BOM requirement applies |
| SMAJ43CA-E3/5B | Lower 400 W PPPM, higher RθJA (140 °C/W), same VWM/VC but reduced surge margin | Less robust for high-energy transients; suitable only where space constraints prevent SMB use | Use only if PCB layout restricts SMB footprint; verify 400 W rating suffices for system-level surge test profile |
Compared with SMBJ43CA-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while the SMAJ43CA-E3/5B trades 33% lower pulse power for smaller SMA package - requiring careful validation against IEC 61000-4-5 level 4 requirements.
Availability
SMBJ43CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive body control module I/O, and communication port surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ43CA-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, and protection devices with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for industrial automation, automotive subsystems, and telecom infrastructure where robustness and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of SMBJ43CA-E3/5B at its rated surge current?
The SMBJ43CA-E3/5B clamps to a maximum of 69.4 V when subjected to its rated 8.6 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ43CA-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ43CA-E3/5B suitable for automotive applications?
The SMBJ43CA-E3/5B itself is commercial-grade (E3 suffix); however, Vishay offers AEC-Q101-qualified variants under HE3/HM3 suffixes (e.g., SMBJ43CAHE3_B/I). For automotive use, specify the HE3 or HM3 version - the SMBJ43CA-E3/5B is intended for industrial and consumer applications where AEC-Q101 is not required. Always confirm qualification status via the full ordering code before deployment in vehicle systems.
How does the bidirectional design of SMBJ43CA-E3/5B affect its placement on the PCB?
The SMBJ43CA-E3/5B has no polarity marking and functions identically in both directions, so orientation on the PCB is irrelevant. It can be placed across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs, AC-coupled lines, or floating power domains. This eliminates orientation errors during automated placement and simplifies layout versus unidirectional TVS diodes that require cathode alignment.
What is the thermal resistance of SMBJ43CA-E3/5B, and how does it impact power dissipation?
The SMBJ43CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. Since it handles only transient energy (not continuous power), steady-state dissipation is limited to 5.0 W. The low RθJL enables effective heat transfer to PCB copper during short surges, while RθJA informs derating above 25 °C ambient per Figure 2 in the datasheet.
Does SMBJ43CA-E3/5B meet moisture sensitivity level requirements for lead-free reflow?
Yes, SMBJ43CA-E3/5B meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows direct placement into standard lead-free reflow profiles without baking or dry-pack requirements. The device's matte tin-plated leads also comply with J-STD-002 and JESD 22-B102 for solderability and whisker resistance, making SMBJ43CA-E3/5B compatible with high-volume automated SMT assembly.
SMBJ43CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ43CA-E3/5B FAQ
1.How can I place an order for SMBJ43CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CA-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 SMBJ43CA-E3/5B reliable?
The price and inventory of SMBJ43CA-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 SMBJ43CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ43CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CA-E3/5B?
SMBJ43CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CA-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 SMBJ43CA-E3/5B?
For technical support, including SMBJ43CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ43CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ43CA-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 SMBJ43CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ43CA-E3/5B?
All SMBJ43CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CA-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 SMBJ43CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ43CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ43CA-E3/5B Tags
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