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Microchip Technology SMBG5357B/TR13
- Part No.:
- SMBG5357B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5357B/TR13.pdf
- Description:
- DIODE ZENER 20V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,306
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Product details
Overview
SMBG5357B/TR13 from Microsemi is a surface-mount 5 W Zener diode with a nominal Zener voltage of 20 V, ±5% tolerance (B suffix), 3.0 Ω dynamic impedance at 65 mA test current, and maximum regulator current of 75 mA. It operates within -65 °C to +150 °C junction temperature range and is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5357B/TR13 datasheet, SMBG5357B/TR13 pinout, SMBG5357B/TR13 application, or SMBG5357B/TR13 equivalent, this page delivers verified electrical parameters, DO-215AA gull-wing package details, thermal resistance values, surge current rating, and direct alternatives for industrial power management and voltage reference designs.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its Zener voltage is specified at 20 V ±5% under 65 mA DC test current (IZT), with dynamic impedance of 3.0 Ω measured at 10% RMS AC modulation superimposed on IZT.
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). It withstands non-repetitive 8.3 ms half-sine surge currents up to 5.1 A and exhibits <0.5 µA reverse leakage at 14.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at 65 mA - defines stable regulation point for feedback networks |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management above ambient |
| Dynamic Impedance (ZZT) | 3.0 Ω at 65 mA - ensures low output voltage variation under load changes |
| Max Regulator Current (IZM) | 75 mA - sets upper limit for continuous Zener bias current |
| Surge Current (IZSM) | 5.1 A (8.3 ms half-sine) - supports transient overvoltage clamping |
| Reverse Leakage (IR) | <0.5 µA at 14.4 V - minimizes standby power loss in high-impedance circuits |
| Junction Temp Range | -65 °C to +150 °C - enables operation in automotive under-hood and industrial environments |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; terminals are anode and cathode only - no internal circuitry or control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown terminal | Connected to regulated voltage node; must be held positive relative to anode |
| Anode | Reference terminal | Connected to ground or lower-potential rail; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5357B equivalent | Identical electrical specs and test methods - enables legacy design reuse |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT handling and storage |
| Gull-wing lead form | Visible solder joints - supports automated optical inspection (AOI) |
| RoHS-compliant matte-tin plating | Lead-free assembly compatible - meets IPC/JEDEC J-STD-020B |
| High surge current capability | 5.1 A non-repetitive peak - protects downstream circuitry from transients |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint. Use Value: Maintains ±1% output regulation across line/load/temperature with 3.0 Ω ZZT minimizing gain error. |
Use Scenario: Clamps transient spikes on 24 V DC bus lines in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 20 V threshold. Use Value: Absorbs 5.1 A surges without degradation, preserving downstream MOSFET gate drivers. |
| Programmable Voltage Reference | DC-DC Converter Trim Circuit |
Use Scenario: Provides stable 20 V reference for DAC-based analog output modules in test equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for calibration-grade circuits. Use Value: Delivers <0.5 µA leakage and ±5% tolerance - sufficient for 12-bit system accuracy. |
Use Scenario: Adjusts output voltage of adjustable buck regulators via feedback divider scaling. IC Role / Device Role / Timing Role: Fixed-voltage node setting trim point for resistor ratio tuning. Use Value: Enables fine resolution adjustment while maintaining thermal stability over -40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same 20 V ±5%, 5 W rating, axial T-18 package - higher RθJA (150 °C/W vs. 90 °C/W) | Through-hole assembly; unsuitable for high-density SMT layouts | Select when board space allows axial mounting and thermal constraints permit higher ambient rise |
| SMBJ5357B | Same electrical specs but DO-214AA J-bend package - different pad layout and solder joint geometry | Compatible with same PCB footprint family but requires requalification of solder process | Choose for existing J-bend production lines where gull-wing rework is impractical |
Compared with SMBG5357B/TR13, 1N5357B offers identical regulation but inferior thermal performance in SMT environments, while SMBJ5357B matches function and power but demands different stencil and reflow validation due to J-bend lead form.
Availability
SMBG5357B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage references requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMBG5357B/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 semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The SMBG53xxB series was designed to deliver JEDEC-verified 5 W Zener regulation in surface-mount gull-wing packages for high-density power management systems demanding robust thermal and surge performance.
FAQ
What is the Zener voltage tolerance for SMBG5357B/TR13?
The SMBG5357B/TR13 has a Zener voltage tolerance of ±5%, denoted by the "B" suffix in its part number. This means its nominal 20 V breakdown voltage falls between 19.0 V and 21.0 V when tested at 65 mA DC current and 30 °C lead temperature. The tolerance is guaranteed per Microsemi's qualification testing and aligns with JEDEC 1N5357B specifications.
Does SMBG5357B/TR13 require dry packing before reflow soldering?
No, SMBG5357B/TR13 does not require dry packing prior to reflow soldering because it carries Moisture Sensitivity Level 1 (MSL-1) per IPC/JEDEC J-STD-020B. This classification confirms the device is insensitive to moisture absorption during standard factory handling and can be stored indefinitely at ambient conditions without baking.
What is the maximum surge current rating for SMBG5357B/TR13?
The SMBG5357B/TR13 is rated for a non-repetitive peak surge current (IZSM) of 5.1 A, defined as the maximum value of an 8.3 ms half-sine waveform. This rating enables reliable transient suppression in 24 V industrial bus applications without permanent parameter shift, provided surge events remain infrequent and within datasheet limits.
How does the thermal resistance of SMBG5357B/TR13 compare between junction-to-lead and junction-to-ambient?
SMBG5357B/TR13 has RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4 with recommended footprint). The 3.6× difference highlights that effective heat transfer relies heavily on copper pour and thermal vias connecting the lead frame to internal planes - lead conduction dominates thermal path efficiency.
Is SMBG5357B/TR13 RoHS compliant?
Yes, SMBG5357B/TR13 is RoHS compliant, as confirmed by its "e3" marking variant (e.g., SMBG5357B e3/TR13) and matte-tin plating per MIL-STD-750 Method 2026. The standard TR13 tape-and-reel version supplied by Microsemi meets EU Directive 2011/65/EU requirements for lead-free electronics assembly.
SMBG5357B/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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 14.4 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)
SMBG5357B/TR13 FAQ
1.How can I place an order for SMBG5357B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5357B/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 SMBG5357B/TR13 reliable?
The price and inventory of SMBG5357B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5357B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5357B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5357B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5357B/TR13?
SMBG5357B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5357B/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 SMBG5357B/TR13?
For technical support, including SMBG5357B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5357B/TR13 requirements.
6.How does Aetrix verify that SMBG5357B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5357B/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 SMBG5357B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5357B/TR13?
All SMBG5357B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5357B/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 SMBG5357B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5357B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5357B/TR13 Tags
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