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Microchip Technology SMBG5349AE3/TR13
- Part No.:
- SMBG5349AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5349AE3/TR13.pdf
- Description:
- DIODE ZENER 12V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
SMBG5349AE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 12 V, ±10% tolerance (A suffix), and maximum regulator current of 7.5 mA at 25 °C. It uses a DO-215AA gull-wing package, supports visible solder joints, and operates across –65 °C to +150 °C junction temperature for voltage regulation in power supply feedback loops.
For engineers reviewing the SMBG5349AE3/TR13 datasheet, SMBG5349AE3/TR13 pinout, SMBG5349AE3/TR13 application, or SMBG5349AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJL = 25 °C/W), surge current rating (18.7 A), dynamic impedance (2.5 Ω), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a precision shunt voltage reference in DC-DC converter feedback networks and overvoltage protection circuits. Its 12 V Zener voltage is measured at IZT = 100 mA with dynamic impedance ZZT ≤ 2.5 Ω and reverse leakage IR ≤ 2.0 µA at VR = 9.1 V.
The SMBG5349AE3/TR13 exhibits low voltage drift versus temperature due to its specified TJ range (–65 °C to +150 °C) and thermal resistance RθJA = 90 °C/W on FR4 board. It withstands non-repetitive 8.3 ms half-sine surge currents up to 18.7 A per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V ±10% at IZT = 100 mA - defines regulated output voltage in shunt regulator designs |
| Max Regulator Current (IZM) | 7.5 mA - maximum continuous DC current before exceeding 5 W power limit at TL < 25 °C |
| Dynamic Impedance (ZZT) | ≤2.5 Ω - ensures stable regulation under small-signal AC ripple superimposed on DC bias |
| Reverse Leakage (IR) | ≤2.0 µA at VR = 9.1 V - guarantees minimal quiescent current loss in standby mode |
| Surge Current (IZSM) | 18.7 A (8.3 ms half-sine) - enables transient overvoltage clamping without failure |
| Thermal Resistance (RθJL) | 25 °C/W - allows direct heat transfer to PCB copper land, critical for sustained 5 W operation |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - eliminates dry-pack requirement and simplifies SMT handling |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; designed for visible solder joint inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during forward conduction; referenced ground in shunt regulator configuration | Connected to system ground or low-side return path; must handle 1.2 V @ 1.0 A forward drop |
| Cathode | Regulated voltage node; positive terminal during Zener breakdown | Banded end - connected to feedback node or protected rail; carries full IZ current and dissipates 5 W |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5349B equivalence | Identical electrical characteristics and test methods - enables legacy design reuse without requalification |
| RoHS-compliant matte-tin plating | e3 marking confirms lead-free finish compliant with IPC-J-STD-020B Level 1 - supports green manufacturing requirements |
| Gull-wing lead form | DO-215AA package enables optical solder joint inspection and reduces tombstoning risk during reflow |
| High surge current capability | 18.7 A non-repetitive peak - provides robust transient suppression in industrial power rails |
| Stable voltage vs. current | Low ZZT (2.5 Ω) and minimal VZ shift across IZ range - maintains regulation accuracy in varying load conditions |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt reference providing precise 12 V reference to TL431 or similar error amplifier input. Use Value: Maintains ±1% output regulation across line/load/temperature with low ZZT minimizing feedback noise coupling. | Use Scenario: Protecting microcontroller I/O pins against ESD and inductive switching transients on 12 V bus lines. IC Role / Device Role / Timing Role: Fast-acting clamp diverting surge energy to ground before voltage exceeds 13.2 V (VZ + 10%). Use Value: Withstands 18.7 A surges without degradation, preserving downstream logic integrity per MIL-STD-750 method 1020. |
| Industrial Sensor Excitation | Programmable Reference Divider |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in harsh ambient environments (–40 °C to +85 °C). IC Role / Device Role / Timing Role: Precision shunt reference establishing fixed 12 V bias for Wheatstone bridge arms. Use Value: Low temperature coefficient and Level 1 moisture rating ensure long-term stability without hermetic sealing. | Use Scenario: Generating adjustable reference voltages via resistor divider from a fixed 12 V Zener source in analog front-end circuits. IC Role / Device Role / Timing Role: Primary voltage reference node enabling accurate scaling of ADC inputs or DAC outputs. Use Value: Minimal voltage drift (<±0.05%/°C typical) and 2.5 Ω ZZT prevent gain error in precision ratio-metric measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5349B | Same electrical specs, axial T-18 package - higher RθJA (150 °C/W), no RoHS option | Through-hole assembly only; unsuitable for high-density SMT boards | Select when legacy through-hole production or manual prototyping is required |
| SMBJ5349B | Identical VZ, IZM, and ZZT; J-bend DO-214AA package - RθJA = 100 °C/W, same e3 RoHS option | Lower profile but less visible solder joints; slightly reduced thermal performance on FR4 | Select when board height constraints favor J-bend over gull-wing geometry |
Compared with 1N5349B and SMBJ5349B, the SMBG5349AE3/TR13 offers superior thermal management (RθJL = 25 °C/W), visible gull-wing solder joints for AOI, and guaranteed RoHS compliance - making it optimal for automated SMT production of industrial power supplies.
Availability
SMBG5349AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, industrial sensor excitation, and programmable reference divider networks requiring stable component supply and full traceability.
Supply support for SMBG5349AE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial applications.
The SMBG53xxB series targets surface-mount voltage regulation in space-constrained, thermally demanding systems where visible solder joints and JEDEC compatibility are mandatory.
FAQ
What is the Zener voltage tolerance for SMBG5349AE3/TR13?
The SMBG5349AE3/TR13 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in the part number. Its nominal VZ is 12 V, meaning the actual breakdown voltage falls between 10.8 V and 13.2 V at IZT = 100 mA and TL = 25 °C. This tolerance is verified per JEDEC test standards and applies across the full operating temperature range.
Does SMBG5349AE3/TR13 require dry packing before reflow soldering?
No, SMBG5349AE3/TR13 does not require dry packing. It is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions (≤30 °C / 60% RH) without baking prior to SMT reflow. This eliminates moisture-related popcorning risks and simplifies factory handling for SMBG5349AE3/TR13.
What is the maximum surge current rating for SMBG5349AE3/TR13?
The SMBG5349AE3/TR13 is rated for a non-repetitive peak surge current (IZSM) of 18.7 A, defined as an 8.3 ms half-sine waveform. This value is measured under standardized JEDEC conditions and reflects the device's ability to absorb transient energy without parametric shift or catastrophic failure - a key specification for overvoltage clamp applications using SMBG5349AE3/TR13.
How does the DO-215AA package of SMBG5349AE3/TR13 improve manufacturability?
The DO-215AA gull-wing package of SMBG5349AE3/TR13 enables automated optical inspection (AOI) of solder joints due to its exposed lead geometry. Unlike J-bend packages, gull-wing leads allow real-time verification of wetting, fillet shape, and coplanarity - reducing field failures and improving first-pass yield in high-volume SMT lines deploying SMBG5349AE3/TR13.
Is SMBG5349AE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5349AE3/TR13 is fully compatible with lead-free reflow profiles. Its matte-tin (e3) plating supports peak temperatures up to 260 °C for 10 seconds, meeting IPC/JEDEC J-STD-020D requirements. The device's thermal resistance and epoxy body are qualified for standard Pb-free reflow cycles, ensuring reliable interconnect formation without delamination or voiding in SMBG5349AE3/TR13 assemblies.
SMBG5349AE3/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:
- ±10%
- 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)
SMBG5349AE3/TR13 FAQ
1.How can I place an order for SMBG5349AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5349AE3/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 SMBG5349AE3/TR13 reliable?
The price and inventory of SMBG5349AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5349AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5349AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5349AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5349AE3/TR13?
SMBG5349AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5349AE3/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 SMBG5349AE3/TR13?
For technical support, including SMBG5349AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5349AE3/TR13 requirements.
6.How does Aetrix verify that SMBG5349AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5349AE3/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 SMBG5349AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5349AE3/TR13?
All SMBG5349AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5349AE3/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 SMBG5349AE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5349AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5349AE3/TR13 Tags
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