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Microchip Technology SMBG5346B/TR13
- Part No.:
- SMBG5346B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5346B/TR13.pdf
- Description:
- DIODE ZENER 9.1V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,345
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Product details
Overview
SMBG5346B/TR13 from Microsemi is a surface-mount 5 W Zener diode with a nominal breakdown voltage of 9.1 V ±5%, dynamic impedance of 2.0 Ω at 150 mA test current, and maximum regulator current of 520 mA. It operates over -65 °C to +150 °C junction temperature and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5346B/TR13 datasheet, SMBG5346B/TR13 pinout, SMBG5346B/TR13 application, or SMBG5346B/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (9.2 A), moisture sensitivity level (MSL 1), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown. Its regulation performance is defined by VZ = 9.1 V at IZT = 150 mA, ZZT = 2.0 Ω, and IZM = 520 mA under TL < 25 °C conditions with adequate heat sinking.
The SMBG5346B/TR13 uses a DO-215AA gull-wing package with cathode band polarity marking, rated for 5.0 W power dissipation at lead temperature ≤25 °C, and exhibits minimal voltage variation versus current due to low dynamic impedance and stable knee characteristics (ZZK = 200 Ω at 1.0 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at 150 mA - defines precise regulation point for feedback networks |
| Power Dissipation (PD) | 5.0 W at TL ≤ 25 °C - requires thermal management via PCB copper pour or heatsink |
| Dynamic Impedance (ZZT) | 2.0 Ω at 150 mA - ensures tight voltage stability under load transients |
| Max Regulator Current (IZM) | 520 mA - sets upper limit for continuous Zener bias current |
| Surge Current (IZSM) | 9.2 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Junction Temp Range | -65 °C to +150 °C - enables operation in automotive under-hood and industrial environments |
| Moisture Sensitivity | Level 1 per J-STD-020B - no dry pack or baking required before reflow |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by a band on the body; terminals are anode (unbanded end) and cathode (banded end); designed for visible solder joints and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node in regulation circuit; carries full Zener current |
| Cathode | Regulated output terminal | Provides stable 9.1 V reference; marked by band; connected to feedback node or clamp point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5346B equivalence | Identical electrical specs and testing - enables drop-in replacement in legacy designs |
| Gull-wing lead form | Visible solder joints and automated optical inspection compatibility - improves manufacturing yield |
| RoHS-compliant matte-tin plating | Lead-free assembly compatibility with SnPb or SAC305 reflow profiles - meets global compliance requirements |
| MSL Level 1 rating | No dry pack or baking needed - reduces handling cost and avoids moisture-induced popcorning |
| High surge current capability | 9.2 A non-repetitive peak - protects downstream circuitry from ESD and lightning-induced transients |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference providing 9.1 V threshold for TL431-like control interface. Use Value: Maintains ±1% output regulation across line/load/temperature with low ZZT minimizing feedback error. | Use Scenario: Biasing and clamping analog front-end inputs exposed to 24 V industrial field wiring. IC Role / Device Role / Timing Role: Overvoltage protector limiting sensor amplifier input to safe 9.1 V ceiling. Use Value: Prevents damage from induced surges up to 9.2 A (8.3 ms), with MSL 1 enabling direct SMT placement. |
| Automotive Body Control Module | Programmable Logic Controller Input Protection |
Use Scenario: Regulating auxiliary 9 V rail powering microcontroller peripherals in BCM subsystems. IC Role / Device Role / Timing Role: Low-profile voltage reference maintaining stable supply under battery voltage fluctuations. Use Value: Operates reliably from -40 °C to +125 °C ambient with 25 °C/W RθJL enabling compact thermal design. | Use Scenario: Protecting 24 V digital input channels against miswiring and inductive kickback. IC Role / Device Role / Timing Role: Clamp diode shunting excess energy to ground during voltage spikes. Use Value: Withstands repeated 100 V transients without degradation due to robust 5 W power rating and low ZZK. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5346B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and PD specs | Requires through-hole mounting and board space; not suitable for high-density SMT designs | Select when legacy through-hole assembly or manual prototyping is preferred |
| SMBJ5346 | DO-214AA J-bend package; same VZ and tolerance but higher ZZT (3.0 Ω) and lower IZM (475 mA) | Lower surge current rating (8.6 A vs. 9.2 A); slightly reduced regulation accuracy under load | Select when DO-214AA footprint compatibility is required and 0.5 Ω ZZT margin is acceptable |
Compared with 1N5346B and SMBJ5346, the SMBG5346B/TR13 delivers superior thermal performance (25 °C/W vs. >60 °C/W for axial), tighter layout integration via gull-wing leads, and highest surge immunity in the 9.1 V class-making it optimal for space-constrained, high-reliability SMT power regulation.
Availability
SMBG5346B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and automotive body control modules requiring stable component supply, RoHS compliance, and MSL Level 1 handling.
Supply support for SMBG5346B/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 SMBG53xxB series was designed specifically for surface-mount voltage regulation and transient suppression in high-density power systems where thermal performance, visual solder inspection, and JEDEC compatibility are critical.
FAQ
What is the Zener voltage tolerance for SMBG5346B/TR13?
The SMBG5346B/TR13 has a Zener voltage tolerance of ±5%, specified as 9.1 V at 150 mA test current (IZT). This tolerance is denoted by the "B" suffix in the part number and ensures predictable regulation within ±0.455 V across temperature and aging. The device meets JEDEC 1N5346B specifications, and its VZ is measured 40 ±10 ms after DC current application at TL = 25 °C.
Does SMBG5346B/TR13 require dry packing before reflow soldering?
No, SMBG5346B/TR13 does not require dry packing before reflow soldering. It carries a Moisture Sensitivity Level (MSL) rating of Level 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and can be stored and processed under standard factory conditions without baking or dry pack. This simplifies handling and reduces manufacturing overhead compared to higher-MSL components.
What is the maximum surge current rating for SMBG5346B/TR13?
The SMBG5346B/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 9.2 A, specified for an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without failure and is validated under standardized test conditions. The surge capability supports robust overvoltage protection in industrial and automotive applications where load dump or ESD events may occur.
How does the thermal resistance of SMBG5346B/TR13 compare between junction-to-lead and junction-to-ambient?
The SMBG5346B/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W and a junction-to-ambient resistance (RθJA) of 90 °C/W when mounted on an FR4 PCB with 1 oz copper and recommended pad layout. The lower RθJL indicates efficient heat transfer to the PCB leads, making lead temperature the dominant thermal constraint-hence the 5.0 W rating applies only when TL ≤ 25 °C.
Is SMBG5346B/TR13 RoHS compliant?
Yes, SMBG5346B/TR13 is RoHS compliant, using annealed matte-tin plating on gull-wing leads per MIL-STD-750 Method 2026. The "e3" designation is implied in the TR13 tape-and-reel variant, confirming compliance with EU Directive 2011/65/EU. This allows use in lead-free reflow processes (e.g., SAC305) without compromising solderability or long-term reliability.
SMBG5346B/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:
- ±5%
- 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)
SMBG5346B/TR13 FAQ
1.How can I place an order for SMBG5346B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5346B/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 SMBG5346B/TR13 reliable?
The price and inventory of SMBG5346B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5346B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5346B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5346B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5346B/TR13?
SMBG5346B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5346B/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 SMBG5346B/TR13?
For technical support, including SMBG5346B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5346B/TR13 requirements.
6.How does Aetrix verify that SMBG5346B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5346B/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 SMBG5346B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5346B/TR13?
All SMBG5346B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5346B/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 SMBG5346B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5346B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5346B/TR13 Tags
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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