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Microchip Technology SMBG5349C/TR13
- Part No.:
- SMBG5349C/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5349C/TR13.pdf
- Description:
- DIODE ZENER 12V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,654
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Product details
Overview
SMBG5349C/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 12 V, ±2% tolerance (C suffix), 100 mA test current (IZT), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges and is used in power supply overvoltage protection, reference voltage generation, and voltage clamping circuits.
For engineers reviewing the SMBG5349C/TR13 datasheet, SMBG5349C/TR13 pinout, SMBG5349C/TR13 application, or SMBG5349C/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current capability (7.5 A), thermal resistance (25 °C/W junction-to-lead), and RoHS-compliant matte-tin plating for reliable solder joint visibility.
Technical Context
This device operates as a reverse-biased voltage regulator with specified breakdown at 12 V ±2% under 100 mA DC test current. Its dynamic impedance is 2.5 Ω at IZT, and it maintains stable regulation across -65 °C to +150 °C junction temperature range.
The SMBG5349C/TR13 uses a void-free thermosetting epoxy case (UL94V-0), gull-wing leads with annealed matte-tin plating per MIL-STD-750 method 2026, and features moisture sensitivity level 1-no dry pack required per IPC/JEDEC J-STD-020B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V ±2% at 100 mA - ensures precise voltage reference within tight tolerance for feedback loops and sensing. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports high-energy transient suppression when adequately heatsinked. |
| Dynamic Impedance (ZZT) | 2.5 Ω at 100 mA - low AC impedance minimizes output voltage variation under load transients. |
| Max Surge Current (IZSM) | 7.5 A (8.3 ms half-sine) - withstands common-line surges without degradation. |
| Junction Temp Range | -65 °C to +150 °C - enables operation in automotive under-hood and industrial control environments. |
| Thermal Resistance (RθJL) | 25 °C/W - allows efficient heat transfer to PCB copper, critical for sustained 5 W operation. |
| Reverse Leakage (IR) | 2.0 µA at 9.1 V - negligible standby current in high-impedance bias networks. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; anode and cathode terminals are accessible via visible solder joints on standard FR4 PCB with recommended 8.13 mm × 2.16 mm pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to lower-potential side of regulated circuit; defines polarity for clamping and reference functions. |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential side; establishes 12 V reference relative to anode during conduction. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5349B equivalent | Identical electrical specs and testing to legacy through-hole 1N5349B, enabling drop-in redesigns. |
| RoHS-compliant matte-tin plating | Enables lead-free reflow compatibility and eliminates Sn/Pb eutectic concerns in modern assembly lines. |
| Gull-wing lead geometry | Provides visual solder joint inspection and reduces tombstoning risk compared to J-bend packages. |
| Moisture Sensitivity Level 1 | Eliminates baking requirement before reflow, reducing manufacturing cycle time and cost. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing error amplifier input in isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Precision 12 V shunt reference providing stable bias for optocoupler LED drive. Use Value: ±2% VZ tolerance ensures consistent regulation across line/load variations without trimming. | Use Scenario: Generating stable excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift voltage reference source with minimal temperature coefficient impact. Use Value: 2.5 Ω dynamic impedance prevents sensor signal corruption during rapid load changes. |
| Automotive ECU Overvoltage Clamp | Telecom Line Card Protection |
Use Scenario: Clamping 12 V battery rail transients caused by load dump or alternator spikes. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy up to 7.5 A (8.3 ms). Use Value: 5 W power rating and 25 °C/W RθJL enable reliable operation without external heatsink. | Use Scenario: Protecting Ethernet PHY interface ICs from induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Secondary-level clamp limiting voltage to safe levels downstream of primary TVS. Use Value: Low leakage (2.0 µA at 9.1 V) avoids loading sensitive differential receivers during 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 |
|---|---|---|---|
| 1N5349B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and PD specs but higher RθJA (125 °C/W vs. 25 °C/W). | Requires through-hole assembly and larger board area; unsuitable for high-density SMT designs. | Select when legacy through-hole compatibility or manual prototyping is prioritized over space and thermal performance. |
| SMBJ5349B | DO-214AA J-bend package; same electrical specs but different mechanical footprint and RθJL (30 °C/W). | Compatible with existing SMBJ land patterns but offers slightly lower thermal efficiency than SMBG's gull-wing design. | Select when leveraging existing DO-214AA tooling or when gull-wing reflow profile tuning is unavailable. |
Compared with SMBG5349C/TR13, 1N5349B trades surface-mount compatibility and thermal performance for through-hole ease-of-use, while SMBJ5349B retains SMT fit but sacrifices 5 °C/W in junction-to-lead thermal resistance-critical for sustained 5 W operation.
Availability
SMBG5349C/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive ECUs, and telecom line protection requiring stable component supply and RoHS compliance.
Supply support for SMBG5349C/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 SMBG53xx series was designed to deliver JEDEC-standard Zener performance in a gull-wing surface-mount package optimized for automated assembly, thermal reliability, and visual process control in high-volume manufacturing.
FAQ
What is the Zener voltage tolerance for SMBG5349C/TR13?
The "C" suffix in SMBG5349C/TR13 denotes ±2% Zener voltage tolerance at 100 mA test current. This tight tolerance ensures predictable regulation in precision feedback and reference applications where drift must be minimized across temperature and aging.
Does SMBG5349C/TR13 require dry packing before reflow soldering?
No. SMBG5349C/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored and processed without dry pack or baking-even after extended ambient exposure-reducing handling overhead in production.
What is the maximum non-repetitive surge current rating for SMBG5349C/TR13?
SMBG5349C/TR13 is rated for 7.5 A peak surge current (IZSM) under an 8.3 ms half-sine waveform. This value is validated per Microsemi's characterization and supports robust protection against common industrial and automotive transients.
How does the DO-215AA package of SMBG5349C/TR13 differ from DO-214AA?
The DO-215AA gull-wing package of SMBG5349C/TR13 provides visible solder joints and lower thermal resistance (25 °C/W RθJL) versus DO-214AA's J-bend (30 °C/W). This improves thermal reliability in continuous 5 W operation and simplifies AOI inspection.
Is SMBG5349C/TR13 compatible with lead-free reflow profiles?
Yes. SMBG5349C/TR13 uses RoHS-compliant annealed matte-tin plating and is rated for 260 °C solder temperature (10 s), fully supporting standard lead-free reflow processes including JEDEC J-STD-020D-compliant profiles.
SMBG5349C/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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 8.6 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)
SMBG5349C/TR13 FAQ
1.How can I place an order for SMBG5349C/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5349C/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 SMBG5349C/TR13 reliable?
The price and inventory of SMBG5349C/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5349C/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5349C/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5349C/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5349C/TR13?
SMBG5349C/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5349C/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 SMBG5349C/TR13?
For technical support, including SMBG5349C/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5349C/TR13 requirements.
6.How does Aetrix verify that SMBG5349C/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5349C/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 SMBG5349C/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5349C/TR13?
All SMBG5349C/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5349C/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 SMBG5349C/TR13 part is unused and in its original packaging.
Return procedure for SMBG5349C/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5349C/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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