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Microchip Technology SMBG5381A/TR13
- Part No.:
- SMBG5381A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5381A/TR13.pdf
- Description:
- DIODE ZENER 130V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,230
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Product details
Overview
SMBG5381A/TR13 from Microsemi is a surface-mount 5 W Zener diode with a nominal Zener voltage of 130 V, ±10% tolerance (A-suffix), rated for 10 mA test current (IZT), 190 Ω dynamic impedance (ZZT), and 1.2 A maximum surge current (IZSM); used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5381A/TR13 datasheet, SMBG5381A/TR13 pinout, SMBG5381A/TR13 application, or SMBG5381A/TR13 equivalent, this page delivers verified electrical parameters, DO-215AA gull-wing package details, thermal derating behavior, and RoHS-compliant alternatives aligned to JEDEC 1N5381A specifications.
Technical Context
This device operates in reverse breakdown mode with tightly controlled VZ at IZT = 10 mA and exhibits low dynamic impedance (190 Ω) near its knee, enabling stable regulation across varying load currents. Its thermal resistance junction-to-lead is 25 °C/W, supporting reliable 5 W dissipation when lead-temperature (TL) is maintained below 25 °C.
The SMBG5381A/TR13 features cathode band polarity marking, moisture sensitivity level 1 (no dry pack required), and RoHS-compliant matte-tin plating per MIL-STD-750 method 2026. It withstands non-repetitive 8.3 ms half-sine surge currents up to 1.2 A per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 130 V ±10% at 10 mA - defines regulated output voltage under nominal bias; high-voltage capability suits industrial SMPS feedback and clamp circuits. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via PCB copper pour or heatsink attachment to leads for sustained operation. |
| Dynamic Impedance (ZZT) | 190 Ω at 10 mA - low impedance ensures minimal voltage deviation under load transients; critical for stable reference accuracy. |
| Max Surge Current (IZSM) | 1.2 A (8.3 ms half-sine) - enables robust transient suppression without degradation in surge-prone power rails. |
| Junction Temperature Range | –65 °C to +150 °C - supports operation in extended-temperature industrial and automotive under-hood environments. |
| Reverse Leakage (IR) | 0.5 µA at 104 V - ultra-low leakage preserves efficiency in high-impedance bias networks and sensing paths. |
| Thermal Resistance (RθJL) | 25 °C/W - quantifies thermal path from junction to lead; informs minimum copper area needed on PCB for safe 5 W operation. |
Pinout & Package
DO-215AA gull-wing surface-mount package with cathode indicated by a band on the body; terminals are anode (unbanded end) and cathode (banded end); designed for visible solder joint inspection and compatible with standard reflow profiles (260 °C peak, 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in Zener regulator configuration; must handle full surge current during clamping. |
| Cathode | Reverse-biased Zener terminal / high-side connection | Banded end; connected to input rail or feedback node; carries regulated voltage and absorbs transient energy during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5381A Equivalent | Identical electrical characteristics and test methods - enables drop-in replacement in legacy designs qualified to MIL-PRF-19500/510. |
| Moisture Sensitivity Level 1 | No dry pack or baking required before assembly - reduces manufacturing overhead and eliminates moisture-related popcorning risk. |
| Gull-wing Lead Geometry | Visible solder joints and self-centering during reflow - improves first-pass yield and simplifies AOI inspection on high-density PCBs. |
| RoHS Compliant Matte-Tin Plating | Meets IPC-J-STD-006B tin purity and solderability requirements - ensures long-term reliability and compatibility with Pb-free assembly processes. |
| High Surge Withstand | 1.2 A non-repetitive 8.3 ms half-sine rating - protects downstream circuitry from lightning-induced or inductive-switching transients. |
Applications
| Industrial Power Supply Feedback | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 130 V threshold to control PWM duty cycle via secondary-side error signal. Use Value: Tight ±10% VZ tolerance and 190 Ω ZZT ensure <±1.5% output regulation across line/load/temperature variations. |
Use Scenario: Clamping 400 V DC bus in motor drives or solar inverters during regenerative braking or fault conditions. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy spikes exceeding 130 V while limiting bus overvoltage to safe levels. Use Value: 1.2 A IZSM rating allows single-device clamping of 100 J surges without degradation, reducing component count vs. TVS arrays. |
| High-Voltage Reference for Sensing | ESD Protection in Telecom Interfaces |
Use Scenario: Providing stable reference voltage for high-side current sensing or voltage monitoring in battery management systems with >100 V stacks. IC Role / Device Role / Timing Role: Low-drift Zener reference establishing accurate scaling factor for ADC inputs measuring stacked cell voltages. Use Value: Ultra-low 0.5 µA IR at 104 V minimizes loading error in high-impedance divider networks, preserving measurement fidelity. |
Use Scenario: Protecting RS-485 transceivers or Ethernet PHYs from ESD events on data lines exposed to field service or connector mating. IC Role / Device Role / Timing Role: Secondary-stage clamp limiting fast transients after primary TVS, leveraging high-voltage standoff to avoid premature conduction. Use Value: 130 V VZ provides margin above common-mode voltage (e.g., ±15 V RS-485), preventing false triggering while maintaining robust 8 kV HBM protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5381A | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZSM specs; higher RθJA (125 °C/W) due to leadframe geometry. | Requires through-hole mounting and manual assembly; unsuitable for automated SMT lines or space-constrained layouts. | Select 1N5381A only for prototyping, repair, or legacy through-hole designs where rework flexibility outweighs density constraints. |
| SMBJ5381A | DO-214AA J-bend package; same electrical specs but 30% higher RθJA (117 °C/W); slightly larger footprint than SMBG. | Lower thermal performance limits continuous power to ~3.5 W on FR4; less suitable for sustained 5 W regulation without enhanced cooling. | Choose SMBJ5381A only if existing board layout uses DO-214AA footprints and thermal margins permit reduced derating. |
Compared with SMBG5381A/TR13, 1N5381A offers identical regulation performance but sacrifices SMT compatibility, while SMBJ5381A trades thermal efficiency for mechanical fit-making SMBG5381A/TR13 optimal for high-density, thermally demanding 5 W Zener applications.
Availability
SMBG5381A/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, DC bus protection circuits, and high-voltage reference designs requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant packaging.
Supply support for SMBG5381A/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 SMBG53xxA/B series was engineered to deliver JEDEC-qualified 5 W Zener performance in compact gull-wing packages for mission-critical power regulation and transient suppression in harsh environments.
FAQ
What is the Zener voltage tolerance for SMBG5381A/TR13?
The SMBG5381A/TR13 has a Zener voltage tolerance of ±10%, denoted by the "A" suffix in its part number. This means its measured VZ at 10 mA test current falls between 117 V and 143 V. This tolerance is verified per JEDEC test conditions and applies across the full operating temperature range of –65 °C to +150 °C. The SMBG5381A/TR13 maintains this specification without requiring external calibration or trimming.
Can SMBG5381A/TR13 replace 1N5381A in existing designs?
Yes, SMBG5381A/TR13 is a direct surface-mount functional replacement for 1N5381A, sharing identical electrical characteristics including 130 V VZ, 10 mA IZT, 190 Ω ZZT, and 1.2 A IZSM. However, the SMBG5381A/TR13 uses a DO-215AA gull-wing package versus the axial T-18 of 1N5381A, so PCB layout and assembly process must be updated accordingly. No electrical redesign is needed.
What is the maximum continuous power dissipation for SMBG5381A/TR13?
The SMBG5381A/TR13 is rated for 5.0 W continuous power dissipation only when lead temperature (TL) is held below 25 °C. On a standard FR4 board with recommended pad layout, derating begins above 25 °C TL, reaching zero watt capability at 150 °C junction temperature. Its RθJL of 25 °C/W means each watt dissipated raises junction temperature by 25 °C above lead temperature-critical for thermal design validation.
Is SMBG5381A/TR13 RoHS compliant?
Yes, SMBG5381A/TR13 is RoHS compliant, featuring annealed matte-tin plating per MIL-STD-750 method 2026 and meeting IPC-J-STD-006B requirements. The "e3" marking is omitted from the device body per Microsemi's nomenclature convention, but compliance is confirmed in the official T4-LDS-0246-1 datasheet and Microchip's product change notices. No lead or cadmium content is present.
How does SMBG5381A/TR13 perform under surge conditions?
The SMBG5381A/TR13 is rated for 1.2 A non-repetitive peak surge current (IZSM) in an 8.3 ms half-sine waveform, per JEDEC test standard. This enables reliable clamping of high-energy transients such as inductive kickback or lightning-induced surges without parametric shift or failure. Its 130 V VZ provides precise clamping threshold, and its 190 Ω dynamic impedance ensures rapid voltage stabilization during surge events.
SMBG5381A/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):
- 130 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 190 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 93.6 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)
SMBG5381A/TR13 FAQ
1.How can I place an order for SMBG5381A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5381A/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 SMBG5381A/TR13 reliable?
The price and inventory of SMBG5381A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5381A/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5381A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5381A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5381A/TR13?
SMBG5381A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5381A/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 SMBG5381A/TR13?
For technical support, including SMBG5381A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5381A/TR13 requirements.
6.How does Aetrix verify that SMBG5381A/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5381A/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 SMBG5381A/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5381A/TR13?
All SMBG5381A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5381A/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 SMBG5381A/TR13 part is unused and in its original packaging.
Return procedure for SMBG5381A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5381A/TR13 Tags
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MM5Z5V1ST1G
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