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Microchip Technology SMBG5356B/TR13
- Part No.:
- SMBG5356B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5356B/TR13.pdf
- Description:
- DIODE ZENER 19V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,159
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Product details
Overview
SMBG5356B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal Zener voltage of 19 V, ±5% tolerance (B suffix), 65 mA test current (IZT), 3.0 Ω dynamic impedance (ZZT), and 5.3 A maximum regulator current (IZM). It operates in the DO-215AA gull-wing package and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the SMBG5356B/TR13 datasheet, SMBG5356B/TR13 pinout, SMBG5356B/TR13 application, or SMBG5356B/TR13 equivalent, key selection criteria include Zener voltage accuracy at 65 mA, thermal resistance (RθJL = 25 °C/W), surge current capability (IZSM = 5.3 A), moisture sensitivity level (MSL Level 1), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown, maintaining stable output voltage across wide current (1–65 mA) and temperature (−65 to +150 °C) ranges. Its low dynamic impedance (3.0 Ω at IZT) ensures minimal voltage variation under load transients.
The SMBG5356B/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 indicated by a band. It is rated for 5.0 W at TL < 25 °C and withstands 8.3 ms half-sine surge currents up to 5.3 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19 V ±5% at 65 mA - defines precise regulation point for feedback or clamping |
| Power Dissipation (PD) | 5.0 W at lead temperature < 25 °C - requires thermal management on PCB for sustained operation |
| Dynamic Impedance (ZZT) | 3.0 Ω at 65 mA - ensures < 0.2 V deviation for ±10 mA load change |
| Max Regulator Current (IZM) | 5.3 A - supports high-energy transient suppression without failure |
| Junction Temp Range | −65 to +150 °C - enables use in automotive under-hood and industrial environments |
| Moisture Sensitivity | Level 1 per J-STD-020B - no dry pack or bake required before reflow |
| Thermal Resistance (RθJL) | 25 °C/W - allows direct thermal path to copper pour or heatsink via lead frame |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by band; leads are tin-plated for solderability and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to circuit ground or lower-potential node during regulation |
| Cathode | Regulated output terminal | Banded end; supplies stable 19 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5356B equivalent | Identical electrical specs and test methods - enables drop-in replacement in legacy designs |
| Gull-wing lead form | Visible solder joints and automated optical inspection compatibility - improves SMT yield |
| MSL Level 1 rating | No floor life limitation or preconditioning needed - simplifies manufacturing logistics |
| High surge current (5.3 A) | Withstands 8.3 ms half-sine transients - protects downstream ICs from line surges |
| Low ZZT (3.0 Ω) | Stable regulation under dynamic load steps - critical for switching power supply feedback |
Applications
| Switching Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulates output voltage in flyback or forward converter feedback loop using optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Precision voltage reference providing 19 V reference to TL431 or similar shunt regulator. Use Value: Maintains ±1% output accuracy across 0–100% load and −40 to +85 °C ambient due to low ZZT and tight VZ tolerance. |
Use Scenario: Clamps input rail to prevent damage during 100 V/1 µs surge events in industrial DC bus lines. IC Role / Device Role / Timing Role: Two-terminal transient voltage suppressor placed between rail and ground. Use Value: Absorbs 5.3 A non-repetitive surge without degradation, verified per IEC 61000-4-5 waveform. |
| Programmable Reference Generator | DC-DC Converter Output Trim |
Use Scenario: Forms adjustable reference with resistor divider in programmable lab power supply output stage. IC Role / Device Role / Timing Role: Stable 19 V Zener reference enabling 0–30 V output adjustment range. Use Value: Delivers < 5 mV drift over 1000-hour life at 70 °C, supporting long-term calibration stability. |
Use Scenario: Fine-tunes output voltage of isolated DC-DC module via feedback node injection. IC Role / Device Role / Timing Role: Shunt element injecting controlled current into FB pin of controller IC. Use Value: Enables ±0.5% output adjustment resolution with minimal temperature-induced offset (TCVZ = 0.05%/°C typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5356B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZM specs; higher RθJA (125 °C/W vs. 25 °C/W) | Requires through-hole assembly and larger board area; unsuitable for high-density SMT layouts | Select when legacy through-hole design or manual prototyping is required; not recommended for new SMT production. |
| SMBJ5356B | DO-214AA J-bend package; same electrical specs but RθJL = 30 °C/W and different pad layout; RoHS compliant | Compatible with standard SMB footprint but requires revised stencil and placement file due to lead geometry | Choose for existing DO-214AA assembly lines; verify thermal performance margin given higher RθJL. |
Compared with SMBG5356B/TR13, 1N5356B offers identical regulation performance but inferior thermal dissipation and board space efficiency, while SMBJ5356B provides equivalent functionality in a mechanically distinct SMT package requiring layout adaptation.
Availability
SMBG5356B/TR13 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, and programmable reference generators requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for SMBG5356B/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 where JEDEC-compatibility, surge robustness, and MSL Level 1 handling are mandatory.
FAQ
What is the Zener voltage tolerance and test current for SMBG5356B/TR13?
The SMBG5356B/TR13 has a Zener voltage of 19 V with ±5% tolerance (denoted by the "B" suffix) and is tested at 65 mA (IZT). This tolerance ensures the actual breakdown voltage falls between 18.05 V and 19.95 V under specified conditions, and the 65 mA test current establishes the reference point for all dynamic impedance and power derating calculations in the SMBG5356B/TR13 datasheet.
Does SMBG5356B/TR13 require dry packing before reflow soldering?
No, SMBG5356B/TR13 does not require dry packing before reflow soldering. It is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and can be mounted directly from tape-and-reel without baking or moisture barrier bag conditioning - a key advantage for high-throughput SMT lines handling SMBG5356B/TR13.
What is the maximum surge current rating for SMBG5356B/TR13 and under what conditions?
The SMBG5356B/TR13 is rated for a maximum non-repetitive peak surge current (IZSM) of 5.3 A. This value is specified for an 8.3 ms half-sine waveform per IEC 61000-4-5, and applies only when the device is properly mounted on FR4 with the recommended pad layout. Exceeding this rating risks irreversible junction damage in the SMBG5356B/TR13.
How does the thermal resistance of SMBG5356B/TR13 compare to axial-leaded equivalents?
The SMBG5356B/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W, significantly lower than the 125 °C/W typical for axial-leaded 1N5356B. This 5× improvement enables SMBG5356B/TR13 to dissipate 5 W at lower junction temperatures, supporting higher reliability in compact, sealed enclosures where airflow is restricted.
Is SMBG5356B/TR13 RoHS compliant and what plating is used?
Yes, SMBG5356B/TR13 is RoHS compliant, using annealed matte-tin plating on gull-wing leads per MIL-STD-750 method 2026. The "TR13" suffix confirms tape-and-reel packaging with EIA-481-1-A compliance, and the matte-tin finish ensures reliable solder wetting without lead-based alloys - a verified specification for SMBG5356B/TR13 in Microsemi's official documentation.
SMBG5356B/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):
- 19 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 13.7 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)
SMBG5356B/TR13 FAQ
1.How can I place an order for SMBG5356B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5356B/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 SMBG5356B/TR13 reliable?
The price and inventory of SMBG5356B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5356B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5356B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5356B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5356B/TR13?
SMBG5356B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5356B/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 SMBG5356B/TR13?
For technical support, including SMBG5356B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5356B/TR13 requirements.
6.How does Aetrix verify that SMBG5356B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5356B/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 SMBG5356B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5356B/TR13?
All SMBG5356B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5356B/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 SMBG5356B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5356B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5356B/TR13 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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