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Microchip Technology SMBG5345B/TR13
- Part No.:
- SMBG5345B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5345B/TR13.pdf
- Description:
- DIODE ZENER 8.7V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,169
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Product details
Overview
SMBG5345B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 8.7 V, ±5% tolerance (B suffix), 2.0 Ω dynamic impedance at 150 mA test current, and 545 mA maximum regulator current. It operates in the DO-215AA gull-wing package and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5345B/TR13 datasheet, SMBG5345B/TR13 pinout, SMBG5345B/TR13 application, or SMBG5345B/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (9.5 A), moisture sensitivity level (MSL Level 1), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse-biased breakdown mode. Its electrical behavior is defined by specified Zener voltage (VZ = 8.7 V at IZT = 150 mA), low dynamic impedance (ZZT = 2.0 Ω), and stable regulation across temperature (–65 to +150 °C junction range).
The SMBG5345B/TR13 uses a void-free thermosetting epoxy case rated UL94V-0, with cathode indicated by band polarity and gull-wing leads solderable per MIL-STD-750 method 2026. It delivers 5.0 W power dissipation at TL < 25 °C and supports high-surge capability (9.5 A, 8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.7 V at 150 mA - defines regulated output voltage under nominal bias conditions |
| Test Current (IZT) | 150 mA - standardized operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZT) | 2.0 Ω - low AC impedance ensures minimal voltage variation under load transients |
| Max Regulator Current (IZM) | 545 mA - maximum DC current before exceeding 5 W power limit at lead temperature < 25 °C |
| Surge Current (IZSM) | 9.5 A - non-repetitive peak current handling for transient overvoltage events (8.3 ms half-sine) |
| Junction-to-Lead Thermal Resistance | 25 °C/W - enables effective heat transfer to PCB copper when mounted per recommended footprint |
| Moisture Sensitivity Level | Level 1 - no dry pack required prior to reflow, simplifying manufacturing handling |
Pinout & Package
Package: DO-215AA gull-wing surface-mount package with cathode band marking; 0.1 g weight; UL94V-0 epoxy body; RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to ground or lower-potential rail in standard Zener regulator configuration |
| Cathode | Reverse breakdown terminal / regulated output node | Banded end; connected to input voltage source and load; provides stable 8.7 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5345B equivalence | Identical electrical characteristics and testing to legacy through-hole 1N5345B, enabling drop-in replacement in upgraded designs |
| Gull-wing lead geometry | Enables visual solder joint inspection and reliable reflow attachment on FR4 PCBs with 1 oz Cu |
| ±5% Zener voltage tolerance | Ensures predictable regulation window (8.27–9.14 V) without requiring post-production trimming |
| High surge current rating | Withstands 9.5 A transient surges (8.3 ms), supporting robust overvoltage clamping in industrial power rails |
| MSL Level 1 rating | Eliminates baking requirements before SMT assembly, reducing process complexity and cost |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise feedback threshold for PWM controller. Use Value: 8.7 V nominal VZ and 2.0 Ω ZZT minimize output voltage drift across line/load/temperature variations. | Use Scenario: Protects downstream 12 V logic circuitry from transient spikes on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy during ESD or inductive kick events. Use Value: 9.5 A IZSM rating and 5 W continuous dissipation enable reliable suppression of 8.3 ms surges without failure. |
| Programmable Voltage Reference | DC-DC Converter Output Trim |
Use Scenario: Provides stable reference for DAC-based adjustable power supply outputs in test equipment. IC Role / Device Role / Timing Role: Primary voltage reference node in precision resistor-divider network. Use Value: ±5% tolerance and low 2.0 Ω dynamic impedance ensure <0.1% output error contribution under varying load currents. | Use Scenario: Fine-tunes output voltage of fixed 5 V buck converter using external resistor divider. IC Role / Device Role / Timing Role: Zener element establishing upper reference point for feedback divider. Use Value: 8.7 V VZ allows accurate scaling to target voltages (e.g., 3.3 V, 2.5 V) with standard 1% resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5345B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM; higher RθJA (120 °C/W vs. 90 °C/W) | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy through-hole design or manual prototyping is required |
| SMBJ5345B | DO-214AA J-bend package; same electrical specs; slightly higher RθJA (95 °C/W); identical MSL Level 1 | Different footprint and solder profile; may require PCB redesign but offers similar thermal performance | Select when DO-214AA is already standardized in production and gull-wing inspection is not required |
Compared with 1N5345B and SMBJ5345B, SMBG5345B/TR13 provides optimal balance of visual solder inspection capability, thermal performance (RθJL = 25 °C/W), and compatibility with automated SMT lines-making it preferred for new high-reliability industrial power designs.
Availability
SMBG5345B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection circuits, and programmable voltage references requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for SMBG5345B/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 in space-constrained, high-surge industrial power systems-emphasizing MSL Level 1 handling, gull-wing manufacturability, and JEDEC 1N53xxB equivalence.
FAQ
What is the Zener voltage tolerance for SMBG5345B/TR13?
The "B" suffix in SMBG5345B/TR13 specifies a ±5% Zener voltage tolerance, meaning its breakdown voltage falls between 8.265 V and 9.135 V at 150 mA test current and 25 °C. This tolerance is verified per JEDEC JESD201 standards and applies across the full operating temperature range of –65 to +150 °C.
Does SMBG5345B/TR13 require dry packing before reflow soldering?
No, SMBG5345B/TR13 has a moisture sensitivity level (MSL) of Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without desiccant or dry packing. This eliminates pre-bake steps and reduces SMT line downtime compared to higher-MSL components.
What is the maximum continuous power dissipation for SMBG5345B/TR13?
SMBG5345B/TR13 is rated for 5.0 W continuous power dissipation when lead temperature (TL) is maintained below 25 °C. At ambient temperature (TA) = 25 °C on a standard FR4 board with 1 oz Cu and recommended footprint, derated power is 1.38 W-verified in Figure 1 of the official datasheet.
How does the gull-wing package of SMBG5345B/TR13 benefit manufacturing?
The DO-215AA gull-wing package of SMBG5345B/TR13 enables real-time visual inspection of solder joints after reflow, improving first-pass yield and reducing X-ray inspection costs. Its lead geometry also provides mechanical stability during board handling and supports fine-pitch placement accuracy down to ±0.1 mm.
Is SMBG5345B/TR13 RoHS compliant?
Yes, SMBG5345B/TR13 features RoHS-compliant annealed matte-tin plating per the "e3" designation implied by the TR13 tape-and-reel suffix and confirmed in Microsemi's T4-LDS-0246-1 datasheet. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above EU RoHS thresholds.
SMBG5345B/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):
- 8.7 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6.25 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)
SMBG5345B/TR13 FAQ
1.How can I place an order for SMBG5345B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5345B/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 SMBG5345B/TR13 reliable?
The price and inventory of SMBG5345B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5345B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5345B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5345B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5345B/TR13?
SMBG5345B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5345B/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 SMBG5345B/TR13?
For technical support, including SMBG5345B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5345B/TR13 requirements.
6.How does Aetrix verify that SMBG5345B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5345B/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 SMBG5345B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5345B/TR13?
All SMBG5345B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5345B/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 SMBG5345B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5345B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5345B/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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