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Microchip Technology SMBG5346AE3/TR13
- Part No.:
- SMBG5346AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5346AE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,283
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Product details
Overview
SMBG5346AE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with a nominal Zener voltage of 9.1 V, ±10% tolerance (A suffix), 2.0 Ω dynamic impedance at 150 mA test current, and DO-215AA gull-wing package. It regulates voltage across wide current and temperature ranges and is used in power supply overvoltage protection and reference circuits.
For engineers reviewing the SMBG5346AE3/TR13 datasheet, SMBG5346AE3/TR13 pinout, SMBG5346AE3/TR13 application, or SMBG5346AE3/TR13 equivalent, key selection factors include its 9.1 V regulation point, 5 W power rating at lead temperature <25 °C, 2.0 Ω Zener impedance, 520 mA maximum regulator current, and RoHS-compliant matte-tin plating.
Technical Context
This device operates as a voltage reference or shunt regulator in reverse-biased mode, with cathode indicated by band and rated for junction temperatures from –65 °C to +150 °C. Its thermal resistance junction-to-lead is 25 °C/W, enabling stable regulation when mounted on FR4 with recommended footprint.
The SMBG5346AE3/TR13 exhibits minimal voltage variation versus current due to low dynamic impedance (2.0 Ω) and maintains regulation under surge conditions up to 9.2 A (8.3 ms half-sine). It meets MIL-STD-750 ESD immunity requirements and has IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±10% at 150 mA - defines precise regulation threshold for clamping or reference use |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports high-energy transient suppression with adequate heat sinking |
| Dynamic Impedance (ZZT) | 2.0 Ω at IZT = 150 mA - ensures tight voltage regulation under varying load currents |
| Maximum Regulator Current (IZM) | 520 mA - sets upper DC current limit before thermal runaway under rated power |
| Reverse Leakage (IR) | 7.5 µA at VR = 6.6 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current (IZSM) | 9.2 A (8.3 ms half-sine) - withstands repetitive line transients without degradation |
| Junction Temperature Range | –65 °C to +150 °C - enables operation in automotive under-hood and industrial control 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; common reference node in shunt regulation | Connected to system ground or low-side rail; forms return path during Zener conduction |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Banded terminal connected to voltage rail requiring stabilization; sinks current to maintain 9.1 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5346B equivalent | Identical electrical characteristics and testing to legacy through-hole 1N5346B, enabling drop-in replacement in upgraded layouts |
| RoHS-compliant matte-tin plating | e3 suffix confirms lead-free termination compatible with Pb-free reflow profiles and environmental compliance programs |
| Gull-wing lead form | DO-215AA package enables visual solder joint inspection and reliable automated optical inspection (AOI) |
| Level 1 moisture sensitivity | No dry pack required per J-STD-020B - eliminates baking step and reduces assembly cost and risk |
| High surge current capability | 9.2 A non-repetitive surge rating supports IEC 61000-4-5 level 4 transient immunity without external TVS stacking |
Applications
| Power Supply Overvoltage Clamp | Industrial Sensor Reference |
|---|---|
Use Scenario: Protects downstream DC/DC converter inputs from 12 V rail surges exceeding 15 V during load dump or inductive switching. IC Role / Device Role / Timing Role: Shunt regulator clamping excess voltage to 9.1 V, diverting fault current to ground. Use Value: Prevents damage to sensitive regulators using only one discrete component with no control logic or timing delay. | Use Scenario: Provides stable 9.1 V reference for analog front-end amplifiers in 4–20 mA loop-powered pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance ensuring consistent sensor excitation across temperature. Use Value: Maintains <±0.5% reference stability over –40 °C to +85 °C, eliminating need for trimming or calibration. |
| Automotive ECU Voltage Monitor | Programmable Logic Controller Input Protection |
Use Scenario: Monitors battery voltage in engine control units and triggers brownout reset if voltage drops below 9.1 V × 0.9 = 8.19 V. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as comparator threshold element feeding into microcontroller GPIO. Use Value: Leverages inherent ±10% tolerance to define hysteresis-free trip point without external resistors or op-amps. | Use Scenario: Shields PLC digital input channels from accidental 24 V field wiring faults or induced transients. IC Role / Device Role / Timing Role: Primary shunt clamp limiting input voltage to 9.1 V before signal conditioning circuitry. Use Value: Absorbs 5 W continuously and 9.2 A surges, preventing latch-up or permanent damage to isolation ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Identical electrical specs but axial-leaded T-18 package; no RoHS compliance (non-e3) | Requires through-hole assembly; unsuitable for high-density SMT production | Select when legacy board repair or hand-solder prototyping is needed |
| SMBJ5346B | Same Zener voltage and tolerance, but DO-214AA J-bend package; RθJA = 100 °C/W vs. 90 °C/W for SMBG | Lower thermal performance on same PCB; requires larger copper area for equivalent power handling | Select when existing DO-214AA footprint must be reused without layout change |
Compared with SMBG5346AE3/TR13, the 1N5346B offers identical regulation but lacks SMT compatibility and RoHS compliance, while SMBJ5346B trades thermal efficiency for footprint reuse-making SMBG5346AE3/TR13 optimal for new high-density, compliant designs.
Availability
SMBG5346AE3/TR13 is available at Aetrix Electronics and suitable for power supply protection, industrial sensor reference, and automotive voltage monitoring requiring stable component supply and full RoHS compliance.
Supply support for SMBG5346AE3/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 specifically for surface-mount voltage regulation in space-constrained, high-surge environments where legacy 1N53xx performance is required without through-hole assembly.
FAQ
What is the Zener voltage tolerance for SMBG5346AE3/TR13?
The "A" suffix in SMBG5346AE3/TR13 indicates a ±10% Zener voltage tolerance, meaning the actual VZ falls between 8.19 V and 10.01 V at 150 mA test current. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range of –65 °C to +150 °C. SMBG5346AE3/TR13 maintains this specification under both DC and transient conditions.
Does SMBG5346AE3/TR13 require dry packing before reflow soldering?
No, SMBG5346AE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored and processed without dry packing or baking. The device's void-free epoxy body and Level 1 rating eliminate pre-reflow desiccation steps, reducing manufacturing cost and process complexity. SMBG5346AE3/TR13 is qualified for standard Pb-free reflow profiles up to 260 °C peak.
What is the maximum continuous power dissipation for SMBG5346AE3/TR13 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz Cu) with the recommended footprint, SMBG5346AE3/TR13 delivers 1.38 W at 25 °C ambient temperature. At lead temperature <25 °C, it achieves full 5.0 W rating. Derating follows the curve in Figure 1 of the datasheet, reaching zero power at ~125 °C ambient. SMBG5346AE3/TR13 thermal resistance junction-to-ambient is 90 °C/W under these conditions.
How does the dynamic impedance of SMBG5346AE3/TR13 affect voltage regulation accuracy?
SMBG5346AE3/TR13 has a dynamic impedance (ZZT) of 2.0 Ω at 150 mA, meaning a 100 mA change in Zener current causes only a 0.2 V shift in output voltage. This low impedance ensures stable regulation under varying load conditions and minimizes error in precision reference applications. SMBG5346AE3/TR13 maintains this ZZT value across –40 °C to +85 °C per characterization data.
Is SMBG5346AE3/TR13 compatible with lead-free soldering processes?
Yes, SMBG5346AE3/TR13 features RoHS-compliant annealed matte-tin plating (e3 suffix) and is qualified for lead-free reflow soldering at 260 °C for 10 seconds. Its gull-wing leads ensure coplanarity and wetting reliability, and the package withstands thermal cycling without delamination. SMBG5346AE3/TR13 meets IPC-A-610 Class 2 and Class 3 acceptance criteria for SMT assembly.
SMBG5346AE3/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:
- ±10%
- 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)
SMBG5346AE3/TR13 FAQ
1.How can I place an order for SMBG5346AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5346AE3/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 SMBG5346AE3/TR13 reliable?
The price and inventory of SMBG5346AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5346AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5346AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5346AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5346AE3/TR13?
SMBG5346AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5346AE3/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 SMBG5346AE3/TR13?
For technical support, including SMBG5346AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5346AE3/TR13 requirements.
6.How does Aetrix verify that SMBG5346AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5346AE3/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 SMBG5346AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5346AE3/TR13?
All SMBG5346AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5346AE3/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 SMBG5346AE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5346AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5346AE3/TR13 Tags
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