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Microchip Technology SMBG5351BE3/TR13
- Part No.:
- SMBG5351BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5351BE3/TR13.pdf
- Description:
- DIODE ZENER 14V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,691
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Product details
Overview
SMBG5351BE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 14 V, ±5% tolerance (B suffix), rated test current of 100 mA, dynamic impedance of 2.5 Ω at IZT, and maximum regulator current of 6.7 mA - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5351BE3/TR13 datasheet, SMBG5351BE3/TR13 pinout, SMBG5351BE3/TR13 application, or SMBG5351BE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJL = 25 °C/W), surge current capability (IZSM = 6.7 A), RoHS-compliant matte-tin plating, and DO-215AA gull-wing package compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across wide current (100 mA IZT, up to 6.7 mA IZM) and temperature (–65 to +150 °C) ranges. Its low dynamic impedance (2.5 Ω) ensures minimal voltage variation under load transients.
The SMBG5351BE3/TR13 uses a void-free thermosetting epoxy case (UL94V-0), gull-wing leads with annealed matte-tin plating per MIL-STD-750 method 2026, and cathode polarity marked by a band - requiring the banded end to be biased positive relative to the anode during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V ±5% at 100 mA - defines regulated output voltage with tight tolerance for feedback stability in SMPS designs. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - supports sustained regulation under moderate continuous load with adequate lead heat sinking. |
| Dynamic Impedance (ZZT) | 2.5 Ω at 100 mA - limits output voltage deviation under dynamic current changes, critical for ripple suppression. |
| Max Surge Current (IZSM) | 6.7 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation in protection circuits. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables efficient heat transfer to PCB copper, supporting reliable operation at elevated ambient temperatures. |
| Reverse Leakage (IR) | 1.0 µA at 10.1 V - ensures negligible standby current in high-impedance bias networks and sensing paths. |
| Junction Temperature Range | –65 to +150 °C - validated for industrial and automotive under-hood environments without derating. |
Pinout & Package
Package: DO-215AA gull-wing surface-mount package (JEDEC standard), 0.1 g weight, UL94V-0 epoxy body, cathode indicated by band. Compatible with EIA-481-1-A 12 mm tape-and-reel (TR13 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal in reverse-bias operation | Connected to lower-potential node (e.g., ground or return path); forms reference node with cathode. |
| Cathode | Current source terminal in reverse-bias operation | Banded end; connected to regulated voltage node (e.g., SMPS feedback divider top); defines VZ reference point. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - eliminates dry-pack requirement and supports standard reflow profiles. |
| Gull-wing lead geometry | Enables visual solder-joint inspection and improves mechanical reliability on FR4 boards with recommended 8.13 × 2.16 mm pad layout. |
| Low dynamic impedance (2.5 Ω) | Reduces output voltage drift under load steps - essential for maintaining feedback accuracy in <1% tolerance power supplies. |
| High surge current rating (6.7 A) | Provides robust transient immunity in input-stage clamping without external series resistors or TVS supplementation. |
| Stable Zener voltage vs. temperature | Specified over –65 to +150 °C with no additional derating - simplifies thermal design in uncontrolled ambient applications. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled divider. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint; replaces TL431 where higher power handling is required. Use Value: 14 V Zener voltage matches common 12 V rail overvoltage thresholds; ±5% tolerance ensures consistent trip point across production batches. |
Use Scenario: Clamps transient spikes on DC bus lines (e.g., 12 V automotive battery rail) before they reach sensitive downstream ICs. IC Role / Device Role / Timing Role: Two-terminal shunt protector absorbing energy during load-dump or inductive kick events. Use Value: 6.7 A non-repetitive surge rating handles ISO 7637-2 Pulse 5a without failure; gull-wing package allows direct placement near connector entry points. |
| Industrial Sensor Biasing | Programmable Reference Node |
|
Use Scenario: Provides stable excitation voltage for bridge-based pressure or strain sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing resistor-divider networks subject to thermal drift. Use Value: 2.5 Ω dynamic impedance minimizes sensor output error from supply current variations; Level 1 moisture rating supports conformal coating processes. |
Use Scenario: Sets adjustable threshold in comparator-based level detection circuits (e.g., battery charge termination, brown-out reset). IC Role / Device Role / Timing Role: Programmable reference element defining switching point via resistor network scaling. Use Value: 14 V nominal value enables precise 12 V system monitoring with margin; cathode-band polarity ensures unambiguous orientation during automated assembly. |
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 electrical specs but higher RθJA (125 °C/W) and no RoHS option. | Requires through-hole mounting and manual assembly; unsuitable for high-density SMT lines. | Select when legacy through-hole design or hand-solder repair is required; avoid for new SMT production. |
| SMBJ5351B | DO-214AA J-bend package; same VZ, IZT, and tolerance, but RθJL = 30 °C/W and IZSM = 6.2 A. | Lower surge margin and reduced thermal performance limit use in high-stress transient environments. | Acceptable for cost-sensitive consumer applications with lower surge exposure; verify thermal margin in final layout. |
Compared with 1N5351B and SMBJ5351B, SMBG5351BE3/TR13 delivers superior thermal management (25 °C/W vs. 30–125 °C/W), guaranteed RoHS compliance, and gull-wing visibility for AOI - making it optimal for industrial-grade SMT power regulation where long-term reliability and process control are critical.
Availability
SMBG5351BE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage protection clamp, and industrial sensor biasing applications requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for SMBG5351BE3/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, thermally demanding power systems - emphasizing robust surge handling, low-impedance stability, and process-compatible packaging.
FAQ
What is the Zener voltage tolerance and test current for SMBG5351BE3/TR13?
The SMBG5351BE3/TR13 has a Zener voltage of 14 V with ±5% tolerance (denoted by the 'B' suffix) and is specified at a test current (IZT) of 100 mA. This tolerance ensures predictable regulation across manufacturing lots, and the 100 mA test point aligns with typical operating currents in feedback and clamp applications - enabling accurate circuit modeling using the published VZ and ZZT values.
Does SMBG5351BE3/TR13 require dry packing before reflow soldering?
No, SMBG5351BE3/TR13 does not require dry packing prior to reflow soldering. It carries IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is safe for standard reflow profiles without baking. This is enabled by its void-free UL94V-0 epoxy encapsulation and RoHS-compliant matte-tin plating - reducing manufacturing overhead and eliminating moisture-related popcorning risks.
What is the maximum surge current rating for SMBG5351BE3/TR13 and how is it defined?
The SMBG5351BE3/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 6.7 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure - critical for protecting downstream components during load dump or inductive switching events in automotive and industrial power rails.
How does the DO-215AA gull-wing package of SMBG5351BE3/TR13 improve manufacturability?
The DO-215AA gull-wing package of SMBG5351BE3/TR13 provides visible solder joints for automated optical inspection (AOI), reduces tombstoning risk due to symmetrical lead geometry, and supports high-density placement with a compact 4.06 × 3.30 mm footprint. Its 25 °C/W junction-to-lead thermal resistance also enables effective heat conduction into PCB copper - improving long-term reliability in thermally stressed applications.
Is SMBG5351BE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5351BE3/TR13 is fully compatible with lead-free reflow profiles. Its matte-tin plating meets MIL-STD-750 method 2026 solderability requirements and withstands peak temperatures up to 260 °C for 10 seconds. The device is qualified for standard JEDEC J-STD-020D reflow cycles - including ramp-to-peak, time above liquidus (TAL), and cooling rate specifications - without degradation of Zener characteristics or mechanical integrity.
SMBG5351BE3/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)
SMBG5351BE3/TR13 FAQ
1.How can I place an order for SMBG5351BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5351BE3/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 SMBG5351BE3/TR13 reliable?
The price and inventory of SMBG5351BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5351BE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5351BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5351BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5351BE3/TR13?
SMBG5351BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5351BE3/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 SMBG5351BE3/TR13?
For technical support, including SMBG5351BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5351BE3/TR13 requirements.
6.How does Aetrix verify that SMBG5351BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5351BE3/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 SMBG5351BE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5351BE3/TR13?
All SMBG5351BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5351BE3/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 SMBG5351BE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5351BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5351BE3/TR13 Tags
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