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Microchip Technology SMBG5368B/TR13
- Part No.:
- SMBG5368B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5368B/TR13.pdf
- Description:
- DIODE ZENER 47V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,565
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Product details
Overview
SMBG5368B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 47 V, ±5% tolerance (B suffix), 25 Ω dynamic impedance at 25 mA test current, and maximum regulator current of 100 mA. It operates across –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 SMBG5368B/TR13 datasheet, SMBG5368B/TR13 pinout, SMBG5368B/TR13 application, or SMBG5368B/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge current rating (210 A @ 8.3 ms), moisture sensitivity level (MSL 1), and gull-wing DO-215AA package compatibility with automated SMT assembly.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse-biased breakdown mode. Its 47 V nominal Zener voltage is specified at IZT = 25 mA with dynamic impedance ZZT = 25 Ω, ensuring stable regulation under varying load currents. The diode exhibits low leakage (<0.5 µA at VR = 33.8 V) and high surge capability (210 A non-repetitive half-sine).
Thermal performance is defined by RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4), enabling reliable 5 W dissipation only when lead temperature is maintained below 25 °C. Polarity is marked by cathode band; operation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZT = 25 mA - defines precise clamping threshold for feedback or protection circuits |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via PCB copper pour or heatsinked leads |
| Dynamic Impedance (ZZT) | 25 Ω at IZT = 25 mA - determines output voltage variation under load current changes |
| Max Regulator Current (IZM) | 100 mA - sets upper limit for continuous Zener bias current without exceeding power rating |
| Surge Current (IZSM) | 210 A (8.3 ms half-sine) - enables transient overvoltage suppression in surge-prone systems |
| Junction Temperature Range | –65 °C to +150 °C - supports operation in automotive under-hood and industrial environments |
| Moisture Sensitivity Level | MSL 1 - eliminates dry-pack requirement and floor-life constraints for SMT assembly |
Pinout & Package
DO-215AA gull-wing surface-mount package with visible solder joints; cathode indicated by molded band on body. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated output node | Banded terminal; connected to feedback point or protected line; maintains 47 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5368B equivalent | Identical electrical specs and test methods - enables drop-in replacement for legacy through-hole designs |
| Gull-wing lead form | Visible solder joints and self-centering during reflow - improves SMT yield and optical inspection reliability |
| MSL 1 moisture rating | No dry pack or baking required - reduces handling cost and avoids moisture-induced popcorning |
| High surge current rating | 210 A peak (8.3 ms) - suppresses lightning-induced transients in telecom and industrial power inputs |
| Low dynamic impedance | 25 Ω at 25 mA - minimizes output voltage deviation across ±20% load current variation |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator circuit; sets precise 47 V threshold for error amplifier input. Use Value: Tight ±5% VZ tolerance and low ZZT ensure <±1% output voltage accuracy across line/load/temperature. |
Use Scenario: Clamps DC bus voltage during regenerative braking in motor drives. IC Role / Device Role / Timing Role: Two-terminal overvoltage clamp placed across bulk capacitor; conducts when voltage exceeds 47 V. Use Value: 210 A surge rating absorbs 100 mJ transients without degradation, extending capacitor lifetime. |
| Industrial Sensor Signal Conditioning | Automotive ECU Power Rail Protection |
Use Scenario: Stabilizes excitation voltage for bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise voltage reference supplying constant 47 V to sensor Wheatstone bridge. Use Value: MSL 1 rating and –65 °C to +150 °C range support unheated enclosures in harsh factory environments. |
Use Scenario: Protects 12 V/24 V vehicle electronics against load-dump spikes up to 60 V. IC Role / Device Role / Timing Role: Primary clamp on main power rail; activated when alternator regulation fails. Use Value: Gull-wing DO-215AA package withstands mechanical vibration better than axial-leaded 1N5368B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5368B | Same VZ, IZT, ZZT, and IZM; axial-leaded DO-41 package instead of DO-215AA | Requires through-hole mounting and manual soldering; unsuitable for high-density SMT boards | Select when retrofitting legacy through-hole designs or where lead-form factor simplifies prototyping |
| SMBJ5368B | Identical electrical specs; J-bend DO-214AA package instead of gull-wing DO-215AA | Lower profile but no visible solder joint; different pad layout and reflow profile requirements | Select when board space is constrained vertically and J-bend footprint matches existing layout |
Compared with 1N5368B and SMBJ5368B, SMBG5368B/TR13 offers superior process control for automated SMT due to gull-wing geometry and MSL 1 rating, while maintaining identical regulation performance - critical for volume production of compact power supplies.
Availability
SMBG5368B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and industrial sensor signal conditioning requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG5368B/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMBG53xxB series was designed specifically for surface-mount voltage regulation in space-constrained, thermally demanding applications where JEDEC-compatibility and MSL 1 handling are mandatory.
FAQ
What is the Zener voltage tolerance for SMBG5368B/TR13?
The 'B' suffix in SMBG5368B/TR13 indicates a ±5% Zener voltage tolerance. At 25 °C, the measured VZ falls between 44.65 V and 49.35 V when tested at IZT = 25 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0246-1.
Can SMBG5368B/TR13 replace 1N5368B in existing designs?
Yes, SMBG5368B/TR13 is electrically identical to 1N5368B per Microsemi documentation, with matching VZ, IZT, ZZT, IZM, and thermal ratings. However, the DO-215AA gull-wing package requires PCB footprint redesign - it is not a drop-in replacement without layout modification.
What is the maximum surge current rating for SMBG5368B/TR13?
SMBG5368B/TR13 has a maximum non-repetitive surge current (IZSM) of 210 A, specified for an 8.3 ms half-sine waveform. This value is listed in the Electrical Characteristics table on page 3 of the official Microsemi datasheet and reflects its capability to absorb transient energy without failure.
Does SMBG5368B/TR13 require dry packing before SMT assembly?
No, SMBG5368B/TR13 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking. This is explicitly stated in the Maximum Ratings table and Applications/Benefits section of the datasheet.
What is the thermal resistance from junction to ambient for SMBG5368B/TR13?
The junction-to-ambient thermal resistance (RθJA) for SMBG5368B/TR13 is 90 °C/W when mounted on a standard FR4 PCB with 1 oz copper and the recommended pad layout. This value assumes natural convection cooling and is critical for calculating safe operating temperature margins at full 5 W dissipation.
SMBG5368B/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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 33.8 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)
SMBG5368B/TR13 FAQ
1.How can I place an order for SMBG5368B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5368B/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 SMBG5368B/TR13 reliable?
The price and inventory of SMBG5368B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5368B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5368B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5368B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5368B/TR13?
SMBG5368B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5368B/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 SMBG5368B/TR13?
For technical support, including SMBG5368B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5368B/TR13 requirements.
6.How does Aetrix verify that SMBG5368B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5368B/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 SMBG5368B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5368B/TR13?
All SMBG5368B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5368B/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 SMBG5368B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5368B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5368B/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
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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