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Microchip Technology SMBG5346CE3/TR13
- Part No.:
- SMBG5346CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5346CE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
SMBG5346CE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 9.1 V, ±2% tolerance (C suffix), 150 mA test current (IZT), 2.0 Ω dynamic impedance (ZZT), and DO-215AA gull-wing package. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation under varying load and temperature conditions.
For engineers reviewing the SMBG5346CE3/TR13 datasheet, SMBG5346CE3/TR13 pinout, SMBG5346CE3/TR13 application, or SMBG5346CE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current capability (520 A), thermal resistance (25 °C/W junction-to-lead), and RoHS-compliant matte-tin plating for lead-free assembly.
Technical Context
This device operates as a precision voltage reference in reverse-biased breakdown mode, maintaining stable output voltage across 1.0–150 mA operating current range with minimal voltage drift versus temperature (−65 to +150 °C junction range). Its low dynamic impedance (2.0 Ω at IZT) ensures tight regulation under dynamic load transients.
The DO-215AA gull-wing package enables visible solder joint inspection and supports high-density PCB layouts. Thermal performance is defined by RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4), enabling 5.0 W dissipation only when lead temperature remains below 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±2% at 150 mA - defines precise clamping/reference level for feedback networks |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via copper pour or heatsinked leads |
| Dynamic Impedance (ZZT) | 2.0 Ω at 150 mA - ensures <18 mV output variation per 36 mA load step |
| Maximum Regulator Current (IZM) | 520 mA - sets upper limit for continuous DC bias without exceeding PD |
| Surge Current (IZSM) | 520 A (8.3 ms half-sine) - withstands transient overvoltage events like ESD or inductive kickback |
| Junction Temperature Range | −65 to +150 °C - supports operation in automotive under-hood and industrial control environments |
| Moisture Sensitivity Level | Level 1 (IPC/JEDEC J-STD-020B) - no dry pack or baking required before reflow |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; banded end must be held positive relative to anode during operation. Leads are RoHS-compliant annealed matte-tin plated for solderability per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference/Return Node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated Output Node | Banded terminal; supplies stable 9.1 V reference or clamps voltage to this level |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5346B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| ±2% Zener voltage tolerance | Supports high-accuracy voltage references without external trimming components |
| Gull-wing lead form | Enables visual solder joint inspection and reduces tombstoning risk during reflow |
| Level 1 moisture sensitivity | Eliminates pre-bake requirement - simplifies SMT line logistics and reduces process cost |
| 520 A surge rating | Provides robust protection against 8.3 ms transients without derating or external TVS staging |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Precision voltage reference providing 9.1 V threshold for error amplifier input. Use Value: Maintains ±1% output regulation across line/load/temperature with no additional calibration. |
Use Scenario: Clamps transient voltage spikes on 12 V automotive CAN bus lines during load dump or inductive switching. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy to ground before downstream IC damage. Use Value: Withstands 520 A surges without degradation, eliminating need for series impedance or staged protection. |
| Industrial Sensor Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Supplies stable 9.1 V reference for ratiometric bridge sensor excitation in 4–20 mA transmitter modules. IC Role / Device Role / Timing Role: Low-drift voltage source ensuring ADC measurement accuracy independent of supply variation. Use Value: 2.0 Ω dynamic impedance minimizes reference error contribution under varying sensor load currents. |
Use Scenario: Limits input voltage to PLC digital input stage during field wiring faults or induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting 24 V logic-level input circuitry from >30 V transients. Use Value: 9.1 V clamping threshold aligns with 24 V system margin, preventing false triggering while preserving noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Same 9.1 V ±2%, 5 W rating, axial T-18 package; higher RθJA (125 °C/W) | Requires through-hole mounting and larger board area; unsuitable for high-density SMT designs | Select for prototyping or low-volume through-hole assemblies where thermal mass compensates for higher ambient resistance |
| SMBJ5346B | Same electrical specs but DO-214AA (J-bend) package; RθJA = 95 °C/W vs. 90 °C/W for SMBG | Lower profile than SMBG but reduced thermal performance; less visible solder joints | Prefer when board height is constrained and thermal margin allows 5% higher RθJA |
Compared with SMBG5346CE3/TR13, 1N5346B offers identical regulation but demands through-hole layout and sacrifices SMT manufacturability, while SMBJ5346B trades minor thermal degradation for tighter vertical clearance in space-constrained modules.
Availability
SMBG5346CE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and programmable logic controller input conditioning requiring stable component supply, consistent Zener voltage accuracy, and RoHS-compliant manufacturing.
Supply support for SMBG5346CE3/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 markets.
The SMBG53xxB series targets high-density, thermally demanding Zener applications where gull-wing visibility, Level 1 moisture handling, and JEDEC compatibility are critical design requirements.
FAQ
What is the Zener voltage tolerance and test current for SMBG5346CE3/TR13?
The SMBG5346CE3/TR13 has a Zener voltage of 9.1 V with ±2% tolerance (indicated by 'C' suffix) and is specified at a test current (IZT) of 150 mA. This tolerance ensures tight regulation in precision reference circuits, and the 150 mA test point reflects typical operating conditions where dynamic impedance is minimized to 2.0 Ω.
Does SMBG5346CE3/TR13 require baking before reflow soldering?
No, SMBG5346CE3/TR13 does not require baking before reflow. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it can be stored indefinitely at standard humidity and temperature without dry packing or pre-reflow bake cycles - simplifying SMT line workflow and reducing process risk.
What is the maximum continuous Zener current for SMBG5346CE3/TR13?
The maximum continuous regulator current (IZM) for SMBG5346CE3/TR13 is 520 mA, calculated per Microsemi's note 3 using P = 5.0 W and VZM = 9.1 V × 1.02 = 9.282 V. This value assumes lead temperature (TL) remains below 25 °C; actual usable current drops with rising lead temperature due to thermal derating.
How does the DO-215AA package of SMBG5346CE3/TR13 differ from DO-214AA?
The DO-215AA package of SMBG5346CE3/TR13 uses gull-wing leads for visible solder joint inspection and improved mechanical stability, whereas DO-214AA (used in SMBJ5346B) employs J-bend leads. DO-215AA also achieves slightly better thermal resistance (RθJA = 90 °C/W vs. 95 °C/W) on FR4 boards, supporting higher sustained power dissipation in compact layouts.
Is SMBG5346CE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5346CE3/TR13 features RoHS-compliant annealed matte-tin plating and is rated for solder temperature up to 260 °C for 10 seconds, fully compatible with standard lead-free reflow profiles (e.g., JEDEC J-STD-020D peak of 260 °C). Its Level 1 moisture rating further ensures reliability without preconditioning.
SMBG5346CE3/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:
- ±2%
- 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)
SMBG5346CE3/TR13 FAQ
1.How can I place an order for SMBG5346CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5346CE3/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 SMBG5346CE3/TR13 reliable?
The price and inventory of SMBG5346CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5346CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5346CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5346CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5346CE3/TR13?
SMBG5346CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5346CE3/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 SMBG5346CE3/TR13?
For technical support, including SMBG5346CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5346CE3/TR13 requirements.
6.How does Aetrix verify that SMBG5346CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5346CE3/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 SMBG5346CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5346CE3/TR13?
All SMBG5346CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5346CE3/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 SMBG5346CE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5346CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5346CE3/TR13 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
onsemi
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