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Microchip Technology SMBG5381B/TR13
- Part No.:
- SMBG5381B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG5381B/TR13.pdf
- Description:
- DIODE ZENER 130V 5W DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,757
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Product details
Overview
SMBG5381B/TR13 from Microsemi is a surface-mount 5 W Zener diode with nominal breakdown voltage of 130 V, ±5% tolerance (B suffix), 10 mA test current (IZT), and 190 Ω dynamic impedance at IZT. It operates over –65 °C to +150 °C junction temperature and delivers stable voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the SMBG5381B/TR13 datasheet, SMBG5381B/TR13 pinout, SMBG5381B/TR13 application, or SMBG5381B/TR13 equivalent, key selection criteria include Zener voltage accuracy, surge current rating (1250 A @ 8.3 ms), thermal resistance (25 °C/W junction-to-lead), and DO-215AA gull-wing package compatibility with high-density PCB layouts.
Technical Context
This device functions as a precision shunt regulator, maintaining stable reverse-biased conduction above 130 V with minimal voltage drift versus current (dynamic impedance 190 Ω) and temperature (–65 °C to +150 °C operating range). Its 5 W power dissipation is rated at TL < 25 °C with adequate heat sinking.
The SMBG5381B/TR13 uses a void-free thermosetting epoxy case (UL94V-0), matte-tin RoHS-compliant plating, and cathode identification via band marking. It meets MIL-STD-750 method 1020 for ESD insensitivity and withstands non-repetitive 8.3 ms half-sine surge currents up to 1250 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 130 V ±5% at 10 mA - defines precise clamping threshold for overvoltage protection and reference stability. |
| Power Dissipation (PD) | 5.0 W at TL < 25 °C - requires thermal management via lead conduction; derates to 1.38 W at TA = 25 °C on FR4. |
| Dynamic Impedance (ZZT) | 190 Ω at 10 mA - low impedance ensures minimal voltage variation under load current changes. |
| Maximum Surge Current (IZSM) | 1250 A (8.3 ms half-sine) - enables robust transient suppression without failure in surge-prone systems. |
| Junction Temperature Range | –65 °C to +150 °C - supports operation in automotive under-hood, industrial motor drives, and outdoor power electronics. |
| Thermal Resistance (RθJL) | 25 °C/W - allows efficient heat transfer from junction to PCB copper via gull-wing leads, critical for sustained 5 W operation. |
| Reverse Leakage (IR) | 0.5 µA at 104 V - ensures negligible standby current in high-impedance bias networks. |
Pinout & Package
Package: DO-215AA gull-wing surface-mount package with cathode indicated by band; moisture sensitivity level 1 (no dry pack required); weight 0.1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node; carries full surge and regulation current during clamping. |
| Cathode | Zener breakdown terminal / high-side connection | Banded end; connected to protected rail or feedback node; maintains 130 V reference under regulation. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N5381B equivalent | Identical electrical characteristics and testing to legacy axial 1N5381B - enables drop-in replacement in legacy designs. |
| Gull-wing lead form | DO-215AA package enables visual solder joint inspection and high-density mounting without J-bend clearance issues. |
| RoHS-compliant matte-tin plating | Meets IPC/JEDEC J-STD-020B Level 1 moisture classification - eliminates baking requirements before reflow. |
| High surge current capability | 1250 A non-repetitive surge rating (8.3 ms) - protects downstream circuitry against lightning-induced transients and inductive kickback. |
| Stable Zener voltage vs. current | 190 Ω dynamic impedance at 10 mA - ensures ≤1.9 V deviation across ±10% current change, critical for precision references. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Motor Drive Overvoltage Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt reference diode providing stable 130 V threshold to TL431 or similar error amplifier. Use Value: Maintains ±1% output regulation across line/load/temperature with minimal drift due to 190 Ω ZZT and –65 °C to +150 °C operation. |
Use Scenario: Clamps DC bus overvoltage spikes caused by regenerative braking in 48 V–400 V motor inverters. IC Role / Device Role / Timing Role: Passive crowbar element absorbing transient energy before IGBT gate driver shutdown triggers. Use Value: Withstands 1250 A surge (8.3 ms) without degradation, preventing false trips and enabling robust system-level surge immunity per IEC 61000-4-5. |
| Telecom Line Card Protection | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Protects Ethernet PHY interface ICs from induced surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Primary shunt clamp on 48 V DC input rail, coordinated with TVS diodes for multi-stage protection. Use Value: Low leakage (0.5 µA at 104 V) avoids loading sensitive bias networks; gull-wing leads support automated optical inspection post-reflow. |
Use Scenario: Provides voltage reference for ADC-based DC link monitoring in solar string inverters operating up to 1000 V. IC Role / Device Role / Timing Role: Precision Zener reference feeding resistive divider network to scale high-voltage DC for isolation amplifier input. Use Value: ±5% tolerance and stable 130 V output enable accurate scaling with <±0.5% total measurement error across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5381B | Axial-leaded T-18 package; identical VZ, IZT, ZZT, and IZSM; higher RθJA (150 °C/W vs. 90 °C/W). | Requires through-hole assembly and larger board area; unsuitable for high-density SMT production. | Select when legacy through-hole design must be maintained or manual repairability is prioritized over footprint density. |
| SMBJ5381B | DO-214AA J-bend package; same electrical specs but 30% higher RθJA (117 °C/W) and no visible solder joint access. | Compatible with standard SMT pick-and-place but lacks gull-wing visual inspection capability. | Select when existing DO-214AA footprint is fixed and thermal performance margin permits higher ambient rise. |
Compared with SMBG5381B/TR13, 1N5381B offers identical regulation performance but demands through-hole assembly and poorer thermal conduction, while SMBJ5381B fits SMT lines but sacrifices solder joint visibility and thermal efficiency-making SMBG5381B/TR13 optimal for new high-reliability, high-density designs requiring inspection and thermal headroom.
Availability
SMBG5381B/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial motor drive protection, telecom line card surge suppression, and renewable energy inverter monitoring requiring stable component supply and RoHS compliance.
Supply support for SMBG5381B/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 and transient protection in space-constrained, high-surge environments where JEDEC-compatibility, visual solder inspection, and thermal reliability are critical.
FAQ
What is the Zener voltage tolerance and test current for SMBG5381B/TR13?
The SMBG5381B/TR13 has a ±5% Zener voltage tolerance (denoted by the "B" suffix) and is specified at a test current (IZT) of 10 mA. At this current, its nominal breakdown voltage is 130 V, meaning the actual VZ falls between 123.5 V and 136.5 V across temperature and production lot. This tolerance and test point are confirmed in the Electrical Characteristics table on page 3 of the Microsemi T4-LDS-0246-1 datasheet.
Does SMBG5381B/TR13 meet RoHS requirements?
Yes, SMBG5381B/TR13 is RoHS compliant, using annealed matte-tin plating per the "e3" designation implied by the "B" suffix and documented in the Features section. It meets IPC/JEDEC J-STD-020B moisture sensitivity Level 1, eliminating the need for dry packing or baking prior to reflow soldering.
What is the maximum surge current rating for SMBG5381B/TR13 and under what conditions?
The SMBG5381B/TR13 is rated for a non-repetitive peak surge current (IZSM) of 1250 A, defined as the maximum value of an 8.3 ms half-sine waveform. This rating assumes single-event application and is validated per the test methodology in Microsemi's characterization, enabling reliable protection against lightning-induced transients and inductive switching spikes.
How does the thermal performance of SMBG5381B/TR13 compare between junction-to-lead and junction-to-ambient?
SMBG5381B/TR13 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W and a junction-to-ambient resistance (RθJA) of 90 °C/W when mounted on an FR4 board with 1 oz copper and the recommended pad layout. This 3.6× difference highlights the importance of leveraging copper pour and thermal vias to conduct heat from the leads-critical for sustaining its 5 W rating.
Is SMBG5381B/TR13 compatible with the legacy 1N5381B diode?
Yes, SMBG5381B/TR13 is explicitly stated as electrically equivalent to JEDEC-registered 1N5381B, with identical VZ, IZT, ZZT, IZM, and IZSM. The only differences are mechanical: SMBG5381B/TR13 uses DO-215AA gull-wing packaging versus T-18 axial leads, enabling surface-mount assembly and visual solder inspection not possible with 1N5381B.
SMBG5381B/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:
- ±5%
- 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)
SMBG5381B/TR13 FAQ
1.How can I place an order for SMBG5381B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG5381B/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 SMBG5381B/TR13 reliable?
The price and inventory of SMBG5381B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG5381B/TR13 is usually 5 days.
3.What payment methods are accepted for SMBG5381B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG5381B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG5381B/TR13?
SMBG5381B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG5381B/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 SMBG5381B/TR13?
For technical support, including SMBG5381B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG5381B/TR13 requirements.
6.How does Aetrix verify that SMBG5381B/TR13 is sourced from the original manufacturer or authorized distributors?
All SMBG5381B/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 SMBG5381B/TR13 meets industry standards.
7.What is the process for return or replacement of SMBG5381B/TR13?
All SMBG5381B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG5381B/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 SMBG5381B/TR13 part is unused and in its original packaging.
Return procedure for SMBG5381B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG5381B/TR13 Tags
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MM5Z5V1ST1G
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