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Microchip Technology SMBG5346BE3/TR13
- Part No.:
- SMBG5346BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5346BE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,542
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Product details
Overview
SMBG5346BE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 9.1 V, ±5% tolerance (B suffix), RoHS-compliant matte-tin plating (e3), and DO-215AA gull-wing package. It delivers stable voltage regulation across wide current and temperature ranges, supports surge currents up to 9.2 A (8.3 ms half-sine), and is used in power supply overvoltage clamping and reference circuits.
For engineers reviewing the SMBG5346BE3/TR13 datasheet, SMBG5346BE3/TR13 pinout, SMBG5346BE3/TR13 application, or SMBG5346BE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, dynamic impedance at 150 mA test current, thermal resistance (25 °C/W junction-to-lead), maximum regulator current (520 mA), and compliance with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased mode, with cathode indicated by band and rated for continuous DC operation up to 5 W at lead temperature <25 °C. Its low dynamic impedance (2.0 Ω at IZT = 150 mA) ensures minimal voltage variation under load changes.
The SMBG5346BE3/TR13 exhibits stable Zener characteristics from –65 °C to +150 °C junction temperature, withstands non-repetitive 8.3 ms surge currents up to 9.2 A, and maintains leakage current ≤7.5 µA at VR = 6.6 V per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at IZT = 150 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via PCB copper pour or heatsink for full rating |
| Dynamic Impedance (ZZT) | 2.0 Ω at IZT = 150 mA - ensures tight regulation under varying load current |
| Max Regulator Current (IZM) | 520 mA - maximum continuous DC current before thermal derating begins |
| Surge Current (IZSM) | 9.2 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Reverse Leakage (IR) | ≤7.5 µA at VR = 6.6 V - guarantees low standby power loss in high-impedance bias networks |
| Junction Temp Range | –65 °C to +150 °C - enables operation in automotive under-hood and industrial 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 node in reverse-bias regulation | Connected to system ground or lower-potential rail during Zener operation |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Banded end; connected to protected node or voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5346B 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 SMT yield |
| Moisture Sensitivity Level 1 | No dry pack required - eliminates baking step prior to reflow, reducing manufacturing cost |
| RoHS-compliant matte-tin plating (e3) | Lead-free assembly compatible with Pb-free reflow profiles - meets global environmental compliance |
| High surge current capability | 9.2 A non-repetitive peak - protects downstream circuitry from ESD and lightning-induced transients |
Applications
| Power Supply Overvoltage Clamp | DC-DC Converter Feedback Reference |
|---|---|
Use Scenario: Clamps input voltage spikes on 12 V automotive power rails during load dump events. IC Role / Device Role / Timing Role: Shunt regulator that diverts excess current to ground when voltage exceeds 9.1 V. Use Value: Prevents damage to downstream LDOs and microcontrollers by limiting rail voltage to safe margin below absolute maximum ratings. |
Use Scenario: Provides stable 9.1 V reference for error amplifier feedback in isolated flyback converters. IC Role / Device Role / Timing Role: Precision voltage reference node in optocoupler-coupled feedback loop. Use Value: Enables ±1% output voltage regulation despite line/load variations and temperature drift. |
| Industrial Sensor Signal Conditioning | ESD Protection for Analog Inputs |
Use Scenario: Stabilizes excitation voltage for 4–20 mA current-loop pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference source for sensor bridge biasing. Use Value: Reduces measurement error caused by supply ripple and thermal coefficient mismatch in analog front-ends. |
Use Scenario: Protects ADC input pins from ±8 kV contact ESD per IEC 61000-4-2 in medical data acquisition modules. IC Role / Device Role / Timing Role: Fast-response shunt clamp that clamps transients before they reach sensitive analog circuitry. Use Value: Limits voltage excursion to ≤12 V during ESD event while maintaining sub-µA leakage in normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; no RoHS marking | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy through-hole production or manual prototyping is required |
| SMBJ5346B | DO-214AA (J-bend) package; same electrical specs but higher RθJA (100 °C/W vs. 90 °C/W); RoHS-compliant | Lower thermal performance on FR4; may require larger copper area for same power handling | Select when DO-214AA footprint is standardized in existing design and RoHS compliance is mandatory |
Compared with SMBG5346BE3/TR13, 1N5346B offers identical regulation performance but lacks SMT compatibility and RoHS compliance, while SMBJ5346B provides RoHS compliance and SMT fit but demands greater PCB thermal design effort due to higher junction-to-ambient resistance.
Availability
SMBG5346BE3/TR13 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor reference circuits, and medical ESD protection requiring stable component supply, consistent RoHS compliance, and verified surge current capability.
Supply support for SMBG5346BE3/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 specifically for surface-mount voltage regulation in space-constrained, thermally demanding applications where JEDEC-standard Zener performance and visible solder joints are critical.
FAQ
What is the Zener voltage tolerance of SMBG5346BE3/TR13?
The SMBG5346BE3/TR13 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's nomenclature. This means its breakdown voltage is guaranteed between 8.65 V and 9.55 V at 150 mA test current and 25 °C ambient, enabling predictable overvoltage clamping in safety-critical circuits.
Does SMBG5346BE3/TR13 require dry packing before reflow soldering?
No, SMBG5346BE3/TR13 does not require dry packing. It carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 rating, meaning it can be stored indefinitely at standard humidity and temperature without baking prior to reflow. This eliminates process steps and reduces manufacturing risk in high-volume SMT lines.
What is the maximum continuous current SMBG5346BE3/TR13 can handle at 25 °C?
SMBG5346BE3/TR13 supports a maximum continuous Zener current (IZM) of 520 mA at lead temperature <25 °C, derived from its 5.0 W power rating and upper-tolerance Zener voltage (9.55 V). Operation above this current requires thermal derating per the power derating curve in the datasheet to avoid junction overheating.
How does the DO-215AA package of SMBG5346BE3/TR13 improve manufacturability?
The DO-215AA gull-wing package of SMBG5346BE3/TR13 enables visual solder joint inspection and reliable automated optical inspection (AOI), reducing post-reflow defect escapes. Its symmetric lead geometry also minimizes tombstoning risk during reflow, improving first-pass yield in fine-pitch SMT assembly.
Is SMBG5346BE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5346BE3/TR13 features RoHS-compliant annealed matte-tin plating (denoted by "e3") and is qualified for peak reflow temperatures up to 260 °C for 10 seconds. It meets JEDEC J-STD-020 requirements for lead-free assembly and is fully compatible with standard Pb-free reflow profiles used in modern electronics manufacturing.
SMBG5346BE3/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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 6.6 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)
SMBG5346BE3/TR13 FAQ
1.How can I place an order for SMBG5346BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5346BE3/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 SMBG5346BE3/TR13 reliable?
The price and inventory of SMBG5346BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5346BE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5346BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5346BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5346BE3/TR13?
SMBG5346BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5346BE3/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 SMBG5346BE3/TR13?
For technical support, including SMBG5346BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5346BE3/TR13 requirements.
6.How does Aetrix verify that SMBG5346BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5346BE3/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 SMBG5346BE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5346BE3/TR13?
All SMBG5346BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5346BE3/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 SMBG5346BE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5346BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5346BE3/TR13 Tags
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