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Microchip Technology SMBG5343B/TR13
- Part No.:
- SMBG5343B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5343B/TR13.pdf
- Description:
- DIODE ZENER 7.5V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,890
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Product details
Overview
SMBG5343B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 7.5 V, ±5% tolerance (B suffix), 175 mA test current (IZT), 1.5 Ω dynamic impedance (ZZT), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges in power supply reference and overvoltage protection circuits.
For engineers reviewing the SMBG5343B/TR13 datasheet, SMBG5343B/TR13 pinout, SMBG5343B/TR13 application, or SMBG5343B/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (10.7 A), thermal resistance (90 °C/W junction-to-ambient), and RoHS-compliant matte-tin plating compatibility with lead-free reflow.
Technical Context
This device operates as a precision voltage reference in reverse-biased mode, with cathode indicated by band and rated for continuous 5 W dissipation at lead temperature <25 °C. Its 1.5 Ω dynamic impedance at 175 mA ensures stable regulation under load variation.
The SMBG5343B/TR13 features moisture sensitivity level 1 per J-STD-020B-no dry pack required-and withstands 260 °C soldering for 10 s. It delivers 10.7 A non-repetitive surge current (8.3 ms half-sine) and maintains low leakage (<10 µA at 5.4 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±5% - precise DC reference voltage at 175 mA test current |
| Power Dissipation (PD) | 5.0 W @ TL < 25 °C - supports high-current regulation with adequate heatsinking |
| Dynamic Impedance (ZZT) | 1.5 Ω @ IZT = 175 mA - low AC impedance ensures minimal output voltage variation with load changes |
| Max Surge Current (IZSM) | 10.7 A (8.3 ms half-sine) - handles transient overvoltage events without failure |
| Reverse Leakage (IR) | ≤10 µA @ VR = 5.4 V - negligible standby current in protection circuits |
| Thermal Resistance (RθJA) | 90 °C/W on FR4 board - defines maximum ambient temperature rise per watt dissipated |
| Junction Temperature Range | –65 to +150 °C - enables operation in industrial and automotive environments |
Pinout & Package
DO-215AA gull-wing surface-mount package with two terminals: anode and cathode. Cathode identified by molded band; device operated with banded end positive relative to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference ground node in Zener regulation | Connected to system ground or lower-potential rail during voltage clamping |
| Cathode | Current exit terminal in forward bias; regulated output node in Zener mode | Banded terminal; connected to input rail to clamp voltage at 7.5 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5343B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Gull-wing leads (DO-215AA) | Visible solder joints and automated optical inspection compatibility - improves manufacturing yield |
| Moisture Sensitivity Level 1 | No dry pack or baking required before assembly - reduces handling cost and process steps |
| RoHS-compliant matte-tin plating | Lead-free reflow compatible up to 260 °C for 10 s - meets modern environmental compliance requirements |
| High surge current capability | 10.7 A non-repetitive peak - protects downstream circuitry from ESD and line transients |
Applications
| DC Power Supply Reference | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in adjustable linear regulators (e.g., LM317-based supplies). IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage for error amplifier comparison. Use Value: 7.5 V ±5% tolerance and 1.5 Ω dynamic impedance ensure output voltage accuracy within ±1.5% over load and temperature. |
Use Scenario: Clamping input voltage to protect microcontroller GPIO pins from 12 V rail transients. IC Role / Device Role / Timing Role: Shunt regulator diverts excess current when voltage exceeds 7.5 V threshold. Use Value: 10.7 A surge rating absorbs 8.3 ms transients without degradation, preserving signal integrity. |
| Industrial Sensor Excitation | Automotive Body Control Module |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision Zener establishes known bias point for ratiometric measurement. Use Value: –65 to +150 °C operating range and low IR (<10 µA) maintain calibration stability across ambient extremes. |
Use Scenario: Regulating auxiliary 7.5 V rail for CAN transceiver bias in 12 V vehicle systems. IC Role / Device Role / Timing Role: Voltage clamp prevents overvoltage damage during load dump events. Use Value: Gull-wing DO-215AA package withstands mechanical vibration; 90 °C/W RθJA supports conduction cooling on metal-core PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5343B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and PD specs | Requires through-hole assembly; not suitable for high-density SMT layouts | Select when legacy through-hole design or manual prototyping is used |
| SMBJ5343B | DO-214AA J-bend package; same electrical specs but different footprint and thermal resistance (RθJA = 80 °C/W) | Better board-level thermal performance on FR4; incompatible pad layout | Select when lower junction-to-ambient resistance is critical and J-bend mounting is acceptable |
Compared with SMBG5343B/TR13, 1N5343B offers identical regulation performance in axial form for through-hole use, while SMBJ5343B provides improved thermal dissipation in a different SMT package-neither is pin-compatible, but both serve equivalent voltage-reference functions in their respective mounting schemes.
Availability
SMBG5343B/TR13 is available at Aetrix Electronics and suitable for DC power supply reference, overvoltage protection circuit, and industrial sensor excitation requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMBG5343B/TR13 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
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The SMBG53xxB series was designed to deliver JEDEC-standard 5 W Zener regulation in surface-mount gull-wing packaging for high-density power management and protection applications where reliability and thermal robustness are critical.
FAQ
What is the Zener voltage tolerance for SMBG5343B/TR13?
The "B" suffix in SMBG5343B/TR13 specifies a ±5% Zener voltage tolerance. At 25 °C, this yields a guaranteed breakdown voltage range of 7.125 V to 7.875 V when tested at 175 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0246-1.
Does SMBG5343B/TR13 require dry packing before reflow soldering?
No, SMBG5343B/TR13 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture to cause popcorning during reflow. The datasheet explicitly states "no dry pack required," simplifying handling and eliminating bake-out steps prior to assembly.
What is the maximum surge current rating for SMBG5343B/TR13?
SMBG5343B/TR13 is rated for a non-repetitive peak surge current (IZSM) of 10.7 A, defined as a single 8.3 ms half-sine waveform. This value is specified in the Electrical Characteristics table and reflects the device's ability to absorb transient energy without parametric shift or failure.
Is SMBG5343B/TR13 RoHS compliant?
Yes, SMBG5343B/TR13 uses RoHS-compliant annealed matte-tin plating on its gull-wing leads, as stated in the Mechanical and Packaging section of the datasheet. The "TR13" suffix denotes tape-and-reel packaging but does not affect RoHS status-the "B" suffix part number itself is RoHS compliant per Microsemi documentation.
How does the thermal resistance of SMBG5343B/TR13 compare between junction-to-lead and junction-to-ambient?
SMBG5343B/TR13 has RθJL = 25 °C/W and RθJA = 90 °C/W when mounted on an FR4 board with recommended footprint. This 3.6× difference highlights that heat transfer to the PCB dominates total thermal resistance-effective copper pour and thermal vias significantly improve power handling beyond the 5 W rating at elevated ambient temperatures.
SMBG5343B/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-215AA, SMB Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG5343B/TR13 FAQ
1.How can I place an order for SMBG5343B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5343B/TR13 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 SMBG5343B/TR13 reliable?
The price and inventory of SMBG5343B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5343B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5343B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5343B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5343B/TR13?
SMBG5343B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5343B/TR13 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 SMBG5343B/TR13?
For technical support, including SMBG5343B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5343B/TR13 requirements.
6.How does Aetrix verify that SMBG5343B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5343B/TR13 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 SMBG5343B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5343B/TR13?
All SMBG5343B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5343B/TR13, 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 SMBG5343B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5343B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5343B/TR13 Tags
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