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Microchip Technology SMBG5349CE3/TR13
- Part No.:
- SMBG5349CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5349CE3/TR13.pdf
- Description:
- DIODE ZENER 12V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,370
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Product details
Overview
SMBG5349CE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 12 V, ±2% tolerance (C suffix), RoHS-compliant matte-tin plating (e3), and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges and withstands high surge stresses in power supply and protection circuits.
For engineers reviewing the SMBG5349CE3/TR13 datasheet, SMBG5349CE3/TR13 pinout, SMBG5349CE3/TR13 application, or SMBG5349CE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (7.5 A), thermal resistance (90 °C/W on FR4), and compatibility with automated SMT assembly under 260 °C reflow.
Technical Context
This device operates as a precision voltage reference and overvoltage clamp in DC power rails. Its 12 V Zener voltage is specified at 100 mA test current (IZT), with dynamic impedance of 2.5 Ω at IZT and 200 Ω at 1 mA knee current (ZZK).
The SMBG5349CE3/TR13 exhibits low reverse leakage (≤2.0 µA at VR = 9.1 V), stable regulation over –65 °C to +150 °C junction temperature, and meets MIL-STD-750 ESD immunity requirements without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V ±2% at 100 mA - ensures tight regulation for 12 V rail stabilization |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports robust transient energy absorption |
| Max Surge Current (IZSM) | 7.5 A (8.3 ms half-sine) - handles common AC line surges and inductive kickback |
| Dynamic Impedance (ZZT) | 2.5 Ω at 100 mA - minimizes output voltage variation under load changes |
| Reverse Leakage (IR) | ≤2.0 µA at 9.1 V - preserves low quiescent current in standby modes |
| Thermal Resistance (RθJA) | 90 °C/W on FR4 (1 oz Cu) - defines required PCB copper area for thermal management |
| Junction Temperature 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 cathode indicated by band; anode and cathode terminals are accessible via visible solder joints for optical inspection and reliable reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated output node | Banded end; supplies stable 12 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating (e3) | Enables lead-free reflow compatibility per JEDEC J-STD-020B Level 1 moisture sensitivity |
| Gull-wing leads (DO-215AA) | Provides visual solder joint inspection and mechanical reliability in high-vibration environments |
| ±2% Zener voltage tolerance (C suffix) | Reduces need for post-assembly trimming in precision 12 V reference applications |
| High surge current rating (7.5 A) | Eliminates need for parallel TVS devices in moderate-energy transient suppression |
| Low dynamic impedance (2.5 Ω) | Maintains regulation stability under fast load transients in switching regulator feedback paths |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing 12 V output in offline AC/DC adapters with minimal external components. IC Role / Device Role / Timing Role: Primary shunt regulator providing precise 12 V reference for optocoupler feedback loop. Use Value: Maintains ±2% output accuracy across 10–100 mA load range without active compensation. |
Use Scenario: Clamping induced voltage spikes on 12 V CAN bus lines during load dump events. IC Role / Device Role / Timing Role: Passive overvoltage clamp limiting rail excursion to ≤14.4 V (120% of nominal). Use Value: Absorbs 7.5 A surge (8.3 ms) without degradation, meeting ISO 7637-2 Pulse 5a requirements. |
| Industrial Sensor Excitation | Programmable Logic Controller Input Conditioning |
Use Scenario: Providing stable 12 V excitation to resistive temperature detectors (RTDs) in PLC analog modules. IC Role / Device Role / Timing Role: Precision voltage source referenced to system ground with low tempco drift. Use Value: Delivers <2.0 µA leakage at 9.1 V, minimizing measurement error in high-impedance sensor bridges. |
Use Scenario: Level-shifting and clamping 24 V digital inputs down to 12 V logic-compatible levels. IC Role / Device Role / Timing Role: Bidirectional voltage limiter protecting microcontroller GPIO pins. Use Value: Withstands repeated 1 kV EFT bursts per IEC 61000-4-4 due to non-sensitive ESD design per MIL-STD-750. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5349B | Same 12 V ±5% Zener voltage, axial T-18 package, higher RθJA (120 °C/W) | Requires through-hole mounting and larger board area; unsuitable for high-density SMT designs | Select only for legacy through-hole systems where reworkability outweighs density constraints |
| SMBJ5349B | Same 12 V ±5%, DO-214AA J-bend package, identical electrical specs but 5% tolerance (B suffix) | Compatible footprint but different leadform; requires stencil and placement adjustment for SMT line | Choose when ±5% tolerance is acceptable and J-bend form factor aligns with existing assembly process |
Compared with SMBG5349CE3/TR13, 1N5349B offers through-hole serviceability but sacrifices thermal performance and board space efficiency, while SMBJ5349B provides SMT compatibility at reduced voltage precision-making SMBG5349CE3/TR13 optimal for space-constrained, high-accuracy 12 V regulation.
Availability
SMBG5349CE3/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and industrial sensor excitation requiring stable component supply and full RoHS compliance.
Supply support for SMBG5349CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMBG53xx series was designed specifically for surface-mount voltage regulation and transient suppression in high-density power systems where thermal performance, surge resilience, and long-term stability are critical.
FAQ
What is the Zener voltage tolerance of SMBG5349CE3/TR13?
The SMBG5349CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its breakdown voltage is guaranteed between 11.76 V and 12.24 V when measured at 100 mA test current and 25 °C ambient. The tighter tolerance reduces calibration overhead in precision 12 V reference designs compared to ±5% or ±10% variants.
Does SMBG5349CE3/TR13 require dry-pack packaging?
No, SMBG5349CE3/TR13 does not require dry-pack packaging. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it can be stored indefinitely at ≤30 °C/60% RH without baking prior to reflow. This simplifies handling and eliminates moisture-related popcorning risks during standard 260 °C lead-free reflow.
What is the maximum surge current rating for SMBG5349CE3/TR13?
The SMBG5349CE3/TR13 is rated for a maximum non-repetitive peak surge current (IZSM) of 7.5 A, defined as a single 8.3 ms half-sine waveform. This rating enables reliable clamping of load-dump transients in 12 V automotive subsystems and inductive switch-off spikes in industrial controls without derating or parallel devices.
How does the DO-215AA package of SMBG5349CE3/TR13 differ from DO-214AA?
The DO-215AA package of SMBG5349CE3/TR13 uses gull-wing leads for visible solder joints and improved mechanical strength, whereas DO-214AA uses J-bend leads. Gull-wing geometry allows easier optical inspection and better resistance to board flexure-induced solder fatigue-critical in automotive and industrial vibration environments where SMBG5349CE3/TR13 is commonly deployed.
Is SMBG5349CE3/TR13 compatible with lead-free reflow processes?
Yes, SMBG5349CE3/TR13 is fully compatible with lead-free reflow. Its "e3" suffix confirms RoHS-compliant matte-tin plating, qualified for peak temperatures up to 260 °C for 10 seconds per JEDEC J-STD-020. The device maintains electrical integrity and solder joint reliability under standard Pb-free thermal profiles used in modern SMT lines.
SMBG5349CE3/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)
SMBG5349CE3/TR13 FAQ
1.How can I place an order for SMBG5349CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5349CE3/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 SMBG5349CE3/TR13 reliable?
The price and inventory of SMBG5349CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5349CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5349CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5349CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5349CE3/TR13?
SMBG5349CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5349CE3/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 SMBG5349CE3/TR13?
For technical support, including SMBG5349CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5349CE3/TR13 requirements.
6.How does Aetrix verify that SMBG5349CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5349CE3/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 SMBG5349CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5349CE3/TR13?
All SMBG5349CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5349CE3/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 SMBG5349CE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5349CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5349CE3/TR13 Tags
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