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Microchip Technology SMBG5351B/TR13
- Part No.:
- SMBG5351B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5351B/TR13.pdf
- Description:
- DIODE ZENER 14V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,006
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Product details
Overview
SMBG5351B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 14 V, ±5% tolerance (B suffix), 100 mA test current (IZT), 2.5 Ω dynamic impedance (ZZT), and 6.7 A maximum regulator current (IZM). It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters.
For engineers reviewing the SMBG5351B/TR13 datasheet, SMBG5351B/TR13 pinout, SMBG5351B/TR13 application, or SMBG5351B/TR13 equivalent, key selection criteria include Zener voltage accuracy at IZT = 100 mA, thermal resistance (RθJL = 25 °C/W), surge current rating (IZSM = 6.7 A), and DO-215AA gull-wing package compatibility with automated SMT assembly.
Technical Context
This device operates in reverse breakdown to maintain stable voltage across wide current (100 mA IZT to 6.7 A IZM) and temperature (-65 to +150 °C) ranges. Its low dynamic impedance (2.5 Ω) ensures minimal voltage variation under load transients.
The DO-215AA gull-wing package enables visible solder joints and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. Thermal performance is specified with RθJL = 25 °C/W (junction-to-lead) and RθJA = 90 °C/W (junction-to-ambient on FR4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% at IZT = 100 mA - defines precise regulation point for feedback networks |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports continuous operation with adequate heat sinking |
| Dynamic Impedance (ZZT) | 2.5 Ω at IZT = 100 mA - ensures <26 mV voltage shift for ±10 mA load change |
| Max Regulator Current (IZM) | 6.7 A - sets absolute DC current limit before thermal runaway |
| Surge Current (IZSM) | 6.7 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Junction Temperature Range | -65 to +150 °C - enables use in automotive under-hood and industrial ambient environments |
| Reverse Leakage (IR) | 1.0 µA at VR = 10.1 V - guarantees low quiescent current in high-impedance bias networks |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; banded end is positive during Zener operation. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in reverse-biased mode | Connected to lower-potential node (e.g., ground or return path) in regulation circuit |
| Cathode | Regulated output node | Banded terminal; connects to voltage source input and load/reference node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5351B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Level 1 moisture sensitivity | No dry pack or baking required before reflow - reduces manufacturing overhead |
| Gull-wing lead form | Visible solder fillets enable AOI inspection - improves process yield in high-reliability production |
| High surge current rating | 6.7 A non-repetitive peak - protects downstream circuitry from line transients per IEC 61000-4-5 |
| Low dynamic impedance | 2.5 Ω at 100 mA - maintains ±0.025 V regulation stability across 10–100 mA load range |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizes output voltage in isolated flyback converter secondary-side feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Precision voltage reference and error signal generator. Use Value: 14 V Zener voltage matches TL431-based shunt regulator thresholds; ±5% tolerance ensures compliance with EN 60950-1 output regulation limits. |
Use Scenario: Clamps 24 V rail against ESD or inductive kickback in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting voltage limiter protecting analog front-end ADC inputs. Use Value: 6.7 A surge rating absorbs 10/1000 µs transients up to 150 W without degradation; DO-215AA footprint fits dense PCB layouts. |
| Industrial Sensor Reference | DC-DC Converter Bias Network |
Use Scenario: Provides stable 14 V reference for RTD-to-digital signal conditioning in temperature transmitters. IC Role / Device Role / Timing Role: Low-drift voltage reference source for precision instrumentation amplifiers. Use Value: 2.5 Ω dynamic impedance minimizes reference error due to sensor excitation current ripple; -65 to +150 °C operating range supports field deployment. |
Use Scenario: Generates gate drive bias for high-side N-channel MOSFET in synchronous buck controller IC. IC Role / Device Role / Timing Role: Regulated auxiliary supply for bootstrap capacitor charging circuit. Use Value: 5 W power rating sustains 100 mA bias current continuously; gull-wing leads ensure reliable reflow joint integrity under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs | Requires through-hole assembly; unsuitable for fully SMT designs | Select when legacy board repair or mixed-technology assembly is required |
| SMBJ5351B | DO-214AA J-bend package; same electrical specs but RθJA = 100 °C/W (vs. 90 °C/W for SMBG) | Lower thermal efficiency on FR4; requires larger copper area for equivalent power handling | Select when existing footprint uses DO-214AA or when higher mounting density is prioritized over thermal margin |
Compared with SMBG5351B/TR13, 1N5351B offers identical regulation performance but mandates through-hole assembly, while SMBJ5351B trades 10 °C/W higher junction-to-ambient resistance for tighter board space utilization-both require layout adaptation but preserve functional equivalence in voltage reference and clamp roles.
Availability
SMBG5351B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controller (PLC) I/O protection, and precision sensor reference circuits requiring stable component supply and long-term obsolescence management.
Supply support for SMBG5351B/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 robust surge immunity are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for SMBG5351B/TR13?
The SMBG5351B/TR13 has a ±5% Zener voltage tolerance (denoted by the "B" suffix), measured at a test current (IZT) of 100 mA and lead temperature (TL) of 25 °C. The nominal Zener voltage is 14 V, meaning the actual value falls between 13.3 V and 14.7 V under these conditions. This tolerance ensures predictable regulation in feedback networks where tight voltage setpoints are required.
Does SMBG5351B/TR13 require moisture-sensitive handling prior to reflow?
No, SMBG5351B/TR13 carries IPC/JEDEC J-STD-020B Level 1 moisture sensitivity classification, meaning it may be stored indefinitely at ambient conditions without dry packing or baking. This eliminates pre-reflow bake cycles and simplifies SMT line logistics-critical for high-volume industrial manufacturing where floor life constraints impact throughput.
What is the maximum continuous power dissipation for SMBG5351B/TR13?
The SMBG5351B/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 recommended footprint, derated power drops to 1.38 W. Designers must verify thermal design using RθJL = 25 °C/W and RθJA = 90 °C/W to avoid exceeding 150 °C junction temperature.
How does the dynamic impedance of SMBG5351B/TR13 affect regulation stability?
The SMBG5351B/TR13 exhibits 2.5 Ω dynamic impedance (ZZT) at IZT = 100 mA, meaning a ±10 mA change in Zener current produces only ±25 mV variation in output voltage. This low impedance ensures stable reference voltage under dynamic load conditions-essential for precision feedback in switch-mode power supplies and analog sensor interfaces where ripple rejection matters.
Is SMBG5351B/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5351B/TR13 supports lead-free reflow with peak solder temperature up to 260 °C for 10 seconds, per its qualification data. The device is offered in both Sn/Pb and RoHS-compliant matte-tin plating options (e3 suffix), and the matte-tin finish ensures reliable wetting and joint formation under standard JEDEC J-STD-020 profiles used for Pb-free assembly.
SMBG5351B/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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.1 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)
SMBG5351B/TR13 FAQ
1.How can I place an order for SMBG5351B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5351B/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 SMBG5351B/TR13 reliable?
The price and inventory of SMBG5351B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5351B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5351B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5351B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5351B/TR13?
SMBG5351B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5351B/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 SMBG5351B/TR13?
For technical support, including SMBG5351B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5351B/TR13 requirements.
6.How does Aetrix verify that SMBG5351B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5351B/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 SMBG5351B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5351B/TR13?
All SMBG5351B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5351B/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 SMBG5351B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5351B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5351B/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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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
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SMAZ12-13-F
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