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Microchip Technology SMBG5355AE3/TR13
- Part No.:
- SMBG5355AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5355AE3/TR13.pdf
- Description:
- DIODE ZENER 18V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,084
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Product details
Overview
SMBG5355AE3/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 18 V, ±10% tolerance (A suffix), rated test current of 65 mA, maximum dynamic impedance of 2.5 Ω at IZT, and maximum regulator current of 75 mA - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5355AE3/TR13 datasheet, SMBG5355AE3/TR13 pinout, SMBG5355AE3/TR13 application, or SMBG5355AE3/TR13 equivalent, this page delivers verified electrical parameters, DO-215AA gull-wing package details, thermal derating behavior, RoHS-compliant matte-tin plating confirmation, and direct alternatives with documented voltage/tolerance/power differences.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased mode, with cathode indicated by band and designed for stable regulation across 10 mA to 75 mA operating current range. Its 2.5 Ω dynamic impedance at 65 mA ensures minimal voltage variation under load transients.
Thermal resistance junction-to-lead is 25 °C/W, enabling reliable 5 W dissipation when lead temperature (TL) remains below 25 °C; derating begins above that point per Figure 1. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±10% - regulates at 16.2–19.8 V under 65 mA test current |
| Power Dissipation (PD) | 5.0 W @ TL < 25 °C - requires heatsinking or low ambient for full rating |
| Test Current (IZT) | 65 mA - defines nominal VZ measurement point and impedance condition |
| Dynamic Impedance (ZZT) | 2.5 Ω - small-signal AC impedance at 65 mA, critical for ripple rejection |
| Max Regulator Current (IZM) | 75 mA - absolute DC current limit before thermal runaway at rated power |
| Reverse Leakage (IR) | 0.5 µA @ 14.4 V - ensures low standby power loss in high-impedance bias networks |
| Junction Temperature Range | −65 to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; terminals are anode (unbanded end) and cathode (banded end); RoHS-compliant annealed matte-tin plating per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference/Return Node | Connected to lower-potential side of regulated circuit; carries full Zener current |
| Cathode | Regulated Output Node | Banded terminal; held at stable VZ above anode; used for feedback or clamping |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5355B Equivalent | Identical electrical specs and test methods - enables legacy design drop-in replacement |
| Gull-Wing Leads | Visible solder joints on FR4 PCBs - supports automated optical inspection (AOI) and rework |
| Level 1 Moisture Sensitivity | No dry pack or baking required before reflow - reduces manufacturing overhead |
| High Surge Current Rating | 5.5 A non-repetitive 8.3 ms half-sine surge - protects against transient overvoltages |
| Low Dynamic Impedance | 2.5 Ω at 65 mA - maintains tight regulation during line/load transients |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision voltage reference defining regulation threshold for TL431 or similar shunt controller. Use Value: 18 V ±10% VZ and 2.5 Ω ZZT ensure <±1% output deviation across 10–75 mA load range. |
Use Scenario: Clamping 24 V rail against ESD or inductive kickback in industrial I/O modules. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing transient energy without active control. Use Value: 5.5 A surge rating and 18 V clamping threshold protect downstream logic from >30 V spikes. |
| Programmable Voltage Reference | DC-DC Converter Trim Circuit |
Use Scenario: Setting adjustable output voltage in lab-grade bench power supplies using resistor divider. IC Role / Device Role / Timing Role: Stable reference node for DAC-controlled feedback divider. Use Value: −65 to +150 °C operating range and <0.5 µA leakage enable accurate trimming over full temperature span. |
Use Scenario: Fine-tuning output of fixed 15 V DC-DC module to 18 V for FPGA core rail. IC Role / Device Role / Timing Role: Series-connected Zener injecting offset into feedback node. Use Value: 75 mA IZM and 5 W rating support continuous trim current without thermal drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 18 V ±10%, 5 W, DO-41 axial package; higher RθJA (150 °C/W) | Through-hole mounting only; unsuitable for high-density SMT layouts | Select for prototyping or low-volume through-hole designs where thermal mass compensates for higher RθJA |
| SMBG5355BE3/TR13 | Same 18 V, but ±5% tolerance (B suffix); identical DO-215AA package and 65 mA IZT | Tighter regulation needed in precision feedback paths; slightly lower IZM (75 mA → 75 mA same, but VZM = 18.9 V vs 19.8 V) | Select when ±5% VZ tolerance is required and board space allows same footprint |
Compared with SMBG5355AE3/TR13, 1N5355B offers identical regulation but demands through-hole assembly and has inferior thermal performance, while SMBG5355BE3/TR13 provides tighter voltage tolerance in the same SMT package - both require validation of layout thermal relief and surge margin for target application.
Availability
SMBG5355AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage clamp protection, and programmable voltage reference applications requiring stable component supply with RoHS compliance and gull-wing solder joint visibility.
Supply support for SMBG5355AE3/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.
SMBG53xx series Zeners were engineered for robust surface-mount voltage regulation in harsh environments - emphasizing thermal stability, surge resilience, and JEDEC compatibility for legacy system upgrades.
FAQ
What is the Zener voltage tolerance for SMBG5355AE3/TR13?
The 'A' suffix in SMBG5355AE3/TR13 specifies ±10% Zener voltage tolerance, meaning its breakdown voltage is guaranteed between 16.2 V and 19.8 V when measured at 65 mA and 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0246-1 datasheet and applies across the full operating temperature range.
Does SMBG5355AE3/TR13 require dry packing before reflow soldering?
No, SMBG5355AE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, explicitly stated on page 1 of the datasheet. It does not require dry pack or baking prior to reflow, simplifying manufacturing flow and reducing risk of popcorning or delamination during assembly.
What is the maximum surge current rating for SMBG5355AE3/TR13?
SMBG5355AE3/TR13 has a maximum non-repetitive Zener surge current (IZSM) of 5.5 A for an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table on page 3. This value is derived from its 5 W power rating and 18 V VZ, enabling robust transient suppression in industrial power rails.
How does the thermal resistance of SMBG5355AE3/TR13 affect its power handling?
SMBG5355AE3/TR13 has RθJL = 25 °C/W and RθJA = 90 °C/W (on FR4 with recommended footprint). At 25 °C lead temperature, it delivers full 5 W; above that, power must be linearly derated - e.g., at TL = 75 °C, max power drops to 3.75 W. This is defined in the Maximum Ratings table on page 1.
Is SMBG5355AE3/TR13 compatible with lead-free reflow profiles?
Yes, SMBG5355AE3/TR13 features RoHS-compliant matte-tin plating and is rated for solder temperature up to 260 °C for 10 seconds (page 1, Maximum Ratings), fully supporting standard lead-free reflow profiles including JEDEC J-STD-020 Class 3a requirements.
SMBG5355AE3/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):
- 18 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13 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)
SMBG5355AE3/TR13 FAQ
1.How can I place an order for SMBG5355AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5355AE3/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 SMBG5355AE3/TR13 reliable?
The price and inventory of SMBG5355AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5355AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5355AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5355AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5355AE3/TR13?
SMBG5355AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5355AE3/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 SMBG5355AE3/TR13?
For technical support, including SMBG5355AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5355AE3/TR13 requirements.
6.How does Aetrix verify that SMBG5355AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5355AE3/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 SMBG5355AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5355AE3/TR13?
All SMBG5355AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5355AE3/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 SMBG5355AE3/TR13 part is unused and in its original packaging.
Return procedure for SMBG5355AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5355AE3/TR13 Tags
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