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Microchip Technology SMBG5355B/TR13
- Part No.:
- SMBG5355B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5355B/TR13.pdf
- Description:
- DIODE ZENER 18V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,830
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Product details
Overview
SMBG5355B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 18 V, ±5% tolerance (B suffix), 65 mA test current (IZT), 2.5 Ω dynamic impedance (ZZT), and 75 mA maximum regulator current (IZM). It operates in power supply voltage regulation and overvoltage protection circuits across industrial control and automotive subsystems.
For engineers reviewing the SMBG5355B/TR13 datasheet, SMBG5355B/TR13 pinout, SMBG5355B/TR13 application, or SMBG5355B/TR13 equivalent, key selection criteria include Zener voltage accuracy at 65 mA, thermal resistance (25 °C/W junction-to-lead), surge current rating (5.5 A), moisture sensitivity level (MSL 1), and DO-215AA gull-wing package compatibility with automated SMT assembly.
Technical Context
This device functions as a precision shunt voltage regulator, maintaining stable 18 V output across operating currents from 1 mA (knee region) to 75 mA (full power), with minimal voltage drift over temperature (−65 to +150 °C junction range). Its low dynamic impedance ensures tight regulation under varying load conditions.
The SMBG5355B/TR13 uses silicon PN-junction construction in a void-free thermosetting epoxy case (UL94V-0), cathode-banded polarity, and matte-tin RoHS-compliant plating. It withstands non-repetitive 8.3 ms half-sine surges up to 5.5 A and exhibits <0.5 µA reverse leakage at 13 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±5% at 65 mA - defines regulated output voltage under nominal bias |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management when mounted on FR4 with recommended footprint |
| Dynamic Impedance (ZZT) | 2.5 Ω at 65 mA - determines regulation stiffness against load current variation |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current before exceeding 5 W rating at high-end VZ |
| Surge Current (IZSM) | 5.5 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Junction Temp Range | −65 to +150 °C - enables operation in extended-temperature industrial and automotive environments |
| Moisture Sensitivity | Level 1 per J-STD-020B - no dry pack required prior to reflow soldering |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; terminals are anode (unbanded end) and cathode (banded end); designed for visible solder joint inspection and compatible with standard SMT reflow profiles (260 °C peak, 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower-potential rail during Zener regulation mode |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to input rail to clamp voltage at 18 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5355B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Gull-wing leadform (DO-215AA) | Enables visual solder joint inspection and high-yield automated placement on dense PCBs |
| MSL Level 1 rating | Eliminates baking requirement before reflow - reduces manufacturing overhead and handling risk |
| RoHS-compliant matte-tin plating | Meets global environmental compliance without sacrificing solderability or reliability |
| High surge current capability | Withstands 5.5 A transient surges - suitable for IEC 61000-4-5 compliant protection stages |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing 18 V rail in programmable logic controller (PLC) I/O module power stage. IC Role / Device Role / Timing Role: Shunt regulator providing precise 18 V reference for analog signal conditioning and ADC biasing. Use Value: Maintains regulation within ±5% across −40 to +85 °C ambient and 1–75 mA load range, minimizing sensor offset drift. |
Use Scenario: Clamping transients on 12 V battery-fed microcontroller supply line in engine control unit. IC Role / Device Role / Timing Role: Overvoltage protector limiting rail excursions above 18 V during load dump events. Use Value: Absorbs 5.5 A surge energy (8.3 ms) without degradation, preserving MCU functionality per ISO 7637-2. |
| Test Equipment Calibration Reference | Telecom Line Card Protection |
Use Scenario: Providing traceable 18 V reference in portable multimeter calibration circuitry. IC Role / Device Role / Timing Role: Precision voltage standard referenced against metrology-grade sources. Use Value: Delivers 18.0 V ±0.9 V at 65 mA with 2.5 Ω dynamic impedance, enabling sub-0.1% measurement accuracy. |
Use Scenario: Protecting Ethernet PHY interface from induced surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Secondary clamping element downstream of primary TVS, fine-tuning clamp level to 18 V. Use Value: Low leakage (<0.5 µA at 13 V) prevents standby current drain while enabling fast response to 10/1000 µs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; higher RθJA (125 °C/W) | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board design mandates axial form factor or manual repair is preferred |
| SMBJ5355B | DO-214AA (J-bend) package; same electrical specs; RθJL = 30 °C/W vs. 25 °C/W for SMBG5355B/TR13 | Lower thermal performance in leaded mounting; less visible solder joints than gull-wing | Choose for compatibility with existing DO-214AA footprints where gull-wing inspection is not required |
Compared with 1N5355B and SMBJ5355B, SMBG5355B/TR13 offers superior thermal resistance (25 °C/W), gull-wing visibility for AOI, and MSL Level 1 handling - making it optimal for new SMT designs demanding high reliability and process control.
Availability
SMBG5355B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, test equipment calibration references, and telecom line card protection requiring stable component supply and full RoHS compliance.
Supply support for SMBG5355B/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 developed to deliver JEDEC-qualified 5 W Zener regulation in surface-mount gull-wing packages for high-density, high-reliability power management applications.
FAQ
What is the Zener voltage tolerance for SMBG5355B/TR13?
The "B" suffix in SMBG5355B/TR13 specifies a ±5% Zener voltage tolerance. At 25 °C, this corresponds to a guaranteed breakdown voltage range of 17.1 V to 18.9 V when measured at the 65 mA test current (IZT), per Microsemi's T4-LDS-0246-1 specification.
Does SMBG5355B/TR13 require dry packing before reflow soldering?
No. SMBG5355B/TR13 has a moisture sensitivity level (MSL) of Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. No dry pack or floor life restrictions apply prior to reflow.
What is the maximum surge current rating for SMBG5355B/TR13?
SMBG5355B/TR13 is rated for a non-repetitive peak surge current (IZSM) of 5.5 A, defined as the maximum value of an 8.3 ms half-sine waveform. This rating is confirmed in the Electrical Characteristics table on page 3 of the Microsemi datasheet T4-LDS-0246-1.
How does the thermal resistance of SMBG5355B/TR13 compare between junction-to-lead and junction-to-ambient?
SMBG5355B/TR13 has RθJL = 25 °C/W and RθJA = 90 °C/W (on FR4 with recommended footprint). The lower RθJL indicates efficient heat transfer to the PCB copper via leads, while RθJA reflects total system dissipation - confirming that proper lead soldering is critical to achieving full 5 W power rating.
Is SMBG5355B/TR13 RoHS compliant?
Yes. SMBG5355B/TR13 uses RoHS-compliant annealed matte-tin plating on gull-wing leads, as stated in the Mechanical and Packaging section of the Microsemi datasheet. The "TR13" suffix denotes tape-and-reel packaging but does not affect RoHS status - compliance is inherent to the "B" variant.
SMBG5355B/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:
- ±5%
- 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)
SMBG5355B/TR13 FAQ
1.How can I place an order for SMBG5355B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5355B/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 SMBG5355B/TR13 reliable?
The price and inventory of SMBG5355B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5355B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5355B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5355B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5355B/TR13?
SMBG5355B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5355B/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 SMBG5355B/TR13?
For technical support, including SMBG5355B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5355B/TR13 requirements.
6.How does Aetrix verify that SMBG5355B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5355B/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 SMBG5355B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5355B/TR13?
All SMBG5355B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5355B/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 SMBG5355B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5355B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5355B/TR13 Tags
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