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Microchip Technology SMBG5355A/TR13
- Part No.:
- SMBG5355A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5355A/TR13.pdf
- Description:
- DIODE ZENER 18V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,167
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Product details
Overview
SMBG5355A/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 18 V, ±10% tolerance, 65 mA test current (IZT), and 2.5 Ω dynamic impedance (ZZT) at IZT - used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the SMBG5355A/TR13 datasheet, SMBG5355A/TR13 pinout, SMBG5355A/TR13 application, or SMBG5355A/TR13 equivalent, this page delivers verified electrical parameters, DO-215AA gull-wing package details, thermal derating behavior, surge current capability (5.5 A), and RoHS-compliant matte-tin plating confirmation - all critical for high-reliability industrial and telecom power designs.
Technical Context
This device operates as a reverse-biased voltage regulator with stable Zener conduction above 13.7 V (VZ min) and up to 14.4 V (VZ max) at 65 mA. Its 2.5 Ω dynamic impedance ensures minimal voltage variation under load transients, while the 25 °C/W junction-to-lead thermal resistance supports reliable heat transfer when soldered to copper pads per recommended footprint.
The SMBG5355A/TR13 meets MIL-STD-750 Method 1020 for ESD insensitivity and withstands non-repetitive 8.3 ms half-sine surge currents up to 5.5 A. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, eliminating dry-pack requirements during storage and handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V nominal, 13.7–14.4 V range at 65 mA - defines regulated output voltage window under specified bias. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - maximum steady-state power before thermal shutdown or degradation. |
| Dynamic Impedance (ZZT) | 2.5 Ω at 65 mA - low impedance enables tight voltage regulation during current fluctuations. |
| Max Surge Current (IZSM) | 5.5 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
| Junction-to-Lead Rθ | 25 °C/W - enables direct thermal path to PCB copper, critical for sustained 5 W operation. |
| Reverse Leakage (IR) | 0.5 µA at 11.5 V - ensures negligible standby current in high-impedance reference paths. |
| Forward Voltage (VF) | 1.2 V at 1.0 A - defines forward conduction loss if accidentally forward-biased. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode band marking; terminals are anode and cathode only - no internal circuitry or additional pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to positive rail in shunt regulation; voltage referenced to anode ground. |
| Anode | Reference/ground node | Typically tied to system ground or return path; establishes Zener bias polarity. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5355B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs. |
| RoHS-compliant matte-tin plating | Meets IPC-J-STD-006B solderability standards and eliminates lead-based assembly constraints. |
| Gull-wing lead form | Enables visual solder joint inspection and reduces tombstoning risk on fine-pitch layouts. |
| Level 1 moisture sensitivity | No dry pack or baking required - simplifies SMT line logistics and reduces handling cost. |
| High surge current rating | 5.5 A non-repetitive peak withstand - protects downstream ICs from lightning-induced transients. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Stabilizes error amplifier input in isolated flyback converters where primary-side sensing requires accurate 18 V reference. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise 18 V reference for optocoupler-driven feedback loop. Use Value: Maintains ±10% regulation across -40 to +125 °C ambient, enabling consistent cross-regulation in multi-output supplies. |
Use Scenario: Supplies stable bias to bridge-based pressure sensors in factory automation systems operating at 24 V DC rails. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric analog signal conditioning. Use Value: Delivers 2.5 Ω dynamic impedance and sub-µA leakage - minimizing sensor offset drift and ADC quantization error. |
| Telecom Line Card Overvoltage Clamp | Automotive Body Control Module Protection |
Use Scenario: Clamps induced surges on 48 V telecom distribution lines exposed to lightning coupling or hot-swap events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across DC input prior to DC/DC converter. Use Value: Withstands 5.5 A 8.3 ms surges without degradation - meeting GR-1089-CORE Level 3 immunity requirements. |
Use Scenario: Protects 12 V microcontroller I/O pins from load-dump transients in vehicle lighting control modules. IC Role / Device Role / Timing Role: Secondary-stage clamp after primary TVS, absorbing residual energy below 20 V. Use Value: Tight 13.7–14.4 V breakdown window prevents false triggering while ensuring robust clamping margin. |
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 Zener voltage, tolerance, and power rating; axial T-18 package instead of DO-215AA. | Requires through-hole assembly and larger board area; not suitable for high-density SMT layouts. | Select when legacy through-hole compatibility or manual prototyping is prioritized over automated SMT yield. |
| SMBJ5355B | Identical electrical specs but J-bend DO-214AA package; 3.5 Ω ZZT vs. 2.5 Ω for SMBG5355A/TR13. | Lower thermal resistance (RθJA = 80 °C/W vs. 90 °C/W) but reduced regulation precision under dynamic loads. | Choose when board space allows J-bend footprint and slightly relaxed impedance stability is acceptable. |
Compared with 1N5355B and SMBJ5355B, SMBG5355A/TR13 offers optimal balance of SMT manufacturability, 2.5 Ω regulation fidelity, and 25 °C/W thermal path - making it preferred for compact, thermally constrained 5 W regulation nodes requiring visible solder joints and zero dry-pack handling.
Availability
SMBG5355A/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, and telecom line card protection requiring stable component supply, full RoHS compliance, and JEDEC-verified Zener performance.
Supply support for SMBG5355A/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The SMBG53xx series was designed specifically for surface-mount 5 W Zener regulation in space-constrained, thermally demanding power systems - emphasizing mechanical robustness, moisture resilience, and JEDEC interoperability.
FAQ
What is the Zener voltage tolerance for SMBG5355A/TR13?
The "A" suffix in SMBG5355A/TR13 denotes ±10% Zener voltage tolerance, resulting in a guaranteed breakdown range of 13.7 V to 14.4 V at 65 mA test current. This tolerance is confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0246-1 datasheet and applies across the full operating temperature range of –65 °C to +150 °C.
Does SMBG5355A/TR13 require dry packing before reflow soldering?
No, SMBG5355A/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing or baking. This eliminates pre-reflow moisture mitigation steps and reduces SMT line complexity - a key advantage over higher-MSL discrete components.
What is the maximum surge current rating for SMBG5355A/TR13?
SMBG5355A/TR13 is rated for 5.5 A peak non-repetitive surge current (IZSM) under an 8.3 ms half-sine waveform, as specified in the Electrical Characteristics table. This value is derived from its 5.0 W power rating and 18 V Zener voltage, and enables reliable transient suppression in telecom and automotive power rails.
Is SMBG5355A/TR13 RoHS compliant?
Yes, SMBG5355A/TR13 uses RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026, as stated in the Mechanical and Packaging section of the datasheet. The "TR13" suffix confirms tape-and-reel packaging, and the absence of "e3" in the base part number does not affect RoHS status - Microsemi's standard SMBG production is RoHS-compliant unless explicitly marked otherwise.
How does SMBG5355A/TR13 compare to SMBJ5355B in thermal performance?
SMBG5355A/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W, while SMBJ5355B is rated at 30 °C/W. This 5 °C/W improvement enables SMBG5355A/TR13 to sustain full 5 W dissipation at higher ambient temperatures when mounted per the recommended DO-215AA pad layout - critical for enclosed industrial enclosures.
SMBG5355A/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)
SMBG5355A/TR13 FAQ
1.How can I place an order for SMBG5355A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5355A/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 SMBG5355A/TR13 reliable?
The price and inventory of SMBG5355A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5355A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5355A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5355A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5355A/TR13?
SMBG5355A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5355A/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 SMBG5355A/TR13?
For technical support, including SMBG5355A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5355A/TR13 requirements.
6.How does Aetrix verify that SMBG5355A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5355A/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 SMBG5355A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5355A/TR13?
All SMBG5355A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5355A/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 SMBG5355A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5355A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5355A/TR13 Tags
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