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Microchip Technology SMBG5346A/TR13
- Part No.:
- SMBG5346A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5346A/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
SMBG5346A/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 9.1 V ±10%, designed for precision voltage regulation in power supply rails and overvoltage protection circuits. It features 2.0 Ω dynamic impedance at 150 mA test current, 520 mA maximum regulator current (IZM), and operates across –65 °C to +150 °C junction temperature range.
For engineers reviewing the SMBG5346A/TR13 datasheet, SMBG5346A/TR13 pinout, SMBG5346A/TR13 application, or SMBG5346A/TR13 equivalent, key selection factors include its DO-215AA gull-wing package, 7.5 µA reverse leakage at 6.6 V, 1.2 V forward voltage at 1.0 A, and suitability for high-density PCB layouts requiring visible solder joints and Level 1 moisture sensitivity.
Technical Context
This device functions as a two-terminal silicon voltage reference operating in reverse-biased breakdown mode. Its Zener voltage is specified at 9.1 V with ±10% tolerance (suffix "A"), tested at 150 mA (IZT), and exhibits 2.0 Ω dynamic impedance (ZZT) under those conditions.
Thermal performance is defined by RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4 with recommended footprint), enabling 5.0 W power dissipation only when lead temperature remains below 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±10% - stable regulation point at 150 mA, usable across wide current range (1–520 mA) |
| Test Current (IZT) | 150 mA - standardized bias point for VZ and ZZT measurement |
| Dynamic Impedance (ZZT) | 2.0 Ω - low AC resistance ensures minimal voltage variation under load transients |
| Max Regulator Current (IZM) | 520 mA - maximum DC current delivering full 5 W at VZ = 9.1 V × 1.1 = 10.01 V |
| Reverse Leakage (IR) | 7.5 µA @ 6.6 V - low off-state current minimizes standby power loss |
| Forward Voltage (VF) | 1.2 V @ 1.0 A - enables use as clamp or series rectifier in dual-role designs |
| Junction Temp Range | –65 °C to +150 °C - supports automotive under-hood and industrial control environments |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode band marking; terminals are anode (unbanded end) and cathode (banded end); polarity must be observed-cathode is positive relative to anode during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference/Return Node | Connected to lower-potential rail; forms current return path during reverse conduction |
| Cathode | Regulated Output Node | Banded terminal; held at stable 9.1 V above anode when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5346B Equivalent | Identical electrical specs and testing per JEDEC standard-enables drop-in replacement in legacy designs |
| Gull-Wing Leads | Visible solder joints enable automated optical inspection (AOI) and simplify rework on dense PCBs |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow-reduces manufacturing overhead and handling risk |
| RoHS Compliant Option | e3 suffix available; matte-tin plating meets lead-free assembly requirements without sacrificing solderability |
| High Surge Withstand | 9.2 A non-repetitive half-sine surge (8.3 ms) protects downstream circuitry from transient overvoltages |
Applications
| Power Supply Voltage Clamp | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Clamping 12 V rail against overshoot during load dump in automotive ECUs. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy to hold rail ≤9.1 V. Use Value: Prevents damage to 10 V-rated microcontrollers using only one passive component with no control logic. |
Use Scenario: Protecting analog sensor inputs from ESD and induced transients in industrial PLC modules. IC Role / Device Role / Timing Role: Fast-acting voltage limiter diverting surge current away from sensitive ADC front-ends. Use Value: Achieves <10 ns response with 9.2 A surge rating-no additional TVS needed for IEC 61000-4-2 Level 4 compliance. |
| Reference Voltage Source | Current-Limited Bias Generator |
Use Scenario: Providing stable 9.1 V reference for op-amp comparators in battery management systems. IC Role / Device Role / Timing Role: Precision DC voltage node with low dynamic impedance (2.0 Ω) minimizing load-induced drift. Use Value: Enables ±0.5% output stability over 1–100 mA load range-superior to resistor-divider alternatives. |
Use Scenario: Generating fixed bias current for LED drivers or transistor amplifiers via series resistor + Zener. IC Role / Device Role / Timing Role: Constant-voltage sink establishing predictable IBIAS = (VIN − 9.1 V)/RSET. Use Value: Delivers repeatable 150 mA nominal current with <±2% variation across temperature and input ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same VZ, IZT, ZZT, and IZM; axial T-18 package instead of DO-215AA surface mount | Requires through-hole PCB layout and wave soldering; unsuitable for high-density SMT assemblies | Select when legacy through-hole design or manual prototyping is preferred over automated SMT placement |
| SMBJ5346B | Identical electrical specs but J-bend (DO-214AA) package; same 9.1 V ±5% tolerance and 520 mA IZM | Lower profile than SMBG but lacks gull-wing visibility; slightly higher RθJA (100 °C/W vs. 90 °C/W) | Choose when board height is constrained and AOI visibility is less critical than thermal margin |
Compared with SMBG5346A/TR13, 1N5346B requires PCB redesign for through-hole mounting, while SMBJ5346B trades gull-wing inspectability for marginally reduced thermal resistance-both remain functionally aligned for 9.1 V regulation but differ in manufacturability and thermal deployment.
Availability
SMBG5346A/TR13 is available at Aetrix Electronics and suitable for automotive power clamping, industrial overvoltage protection, and precision reference voltage generation requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMBG5346A/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 radiation-hardened components.
The SMBG53xx series was engineered for surface-mount voltage regulation in space-constrained, thermally demanding applications-including automotive, industrial controls, and telecom infrastructure-where visible solder joints and moisture-insensitive packaging are essential.
FAQ
What is the Zener voltage tolerance for SMBG5346A/TR13?
The "A" suffix in SMBG5346A/TR13 specifies a ±10% Zener voltage tolerance, meaning the measured VZ falls between 8.19 V and 10.01 V at 150 mA test current and 25 °C. This tolerance is verified per JEDEC test methods and applies across the full operating temperature range.
Does SMBG5346A/TR13 require dry packing before reflow soldering?
No. SMBG5346A/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, confirming it is not hygroscopic and may be mounted directly from reel without baking or dry pack-reducing process steps and handling risk in high-volume SMT lines.
What is the maximum surge current rating for SMBG5346A/TR13?
SMBG5346A/TR13 is rated for 9.2 A peak non-repetitive surge current (IZSM) under an 8.3 ms half-sine waveform, as defined in the datasheet. This value is derived from its 5 W power rating and thermal mass, enabling robust transient suppression without derating.
How does the DO-215AA package of SMBG5346A/TR13 differ from DO-214AA?
The DO-215AA package used by SMBG5346A/TR13 features gull-wing leads for visible solder joints and AOI compatibility, whereas DO-214AA (used in SMBJ5346B) uses J-bend leads. Both share identical electrical specs, but DO-215AA offers superior thermal resistance (RθJA = 90 °C/W vs. 100 °C/W) on FR4 boards.
Is SMBG5346A/TR13 RoHS compliant?
SMBG5346A/TR13 is offered in both Sn/Pb and RoHS-compliant versions; the TR13 reel packaging does not indicate compliance by itself. To ensure RoHS compliance, verify the full part number includes the "e3" suffix (e.g., SMBG5346Ae3/TR13) or confirm material declaration with Aetrix Electronics prior to order.
SMBG5346A/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)
SMBG5346A/TR13 FAQ
1.How can I place an order for SMBG5346A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5346A/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 SMBG5346A/TR13 reliable?
The price and inventory of SMBG5346A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5346A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5346A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5346A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5346A/TR13?
SMBG5346A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5346A/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 SMBG5346A/TR13?
For technical support, including SMBG5346A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5346A/TR13 requirements.
6.How does Aetrix verify that SMBG5346A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5346A/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 SMBG5346A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5346A/TR13?
All SMBG5346A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5346A/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 SMBG5346A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5346A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5346A/TR13 Tags
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