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Microchip Technology 1N5928BUR-1/TR
- Part No.:
- 1N5928BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5928BUR-1/TR.pdf
- Description:
- DIODE ZENER 13V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,700
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Product details
Overview
1N5928BUR-1/TR from Microsemi is a 13 V, 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 28.8 mA test current, 7.0 Ω dynamic impedance at IZT, and 0.25 mA knee current; used for precision voltage regulation in high-density power supply feedback loops and reference circuits.
For engineers reviewing the 1N5928BUR-1/TR datasheet, 1N5928BUR-1/TR pinout, 1N5928BUR-1/TR application, or 1N5928BUR-1/TR equivalent, key selection criteria include Zener voltage tolerance (5%), thermal resistance (40 °C/W junction-to-end cap), hermetic glass construction, MIL-PRF-19500 screening availability, and RoHS-compliant matte tin plating.
Technical Context
This device operates as a two-terminal voltage reference with reverse-biased breakdown behavior, specified at TEC = 30 °C and measured 90 s after DC current application. Its metallurgically bonded tungsten slug structure ensures low thermal resistance and stable Zener voltage over temperature.
It delivers regulated output across 1.0–115 mA operating current range, with 9.9 V minimum reverse voltage (VR) and 550 µA maximum reverse leakage at VR, supporting stable performance in analog sensing and feedback control where low parasitic capacitance and ESD immunity (MIL-STD-750/1020) are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% at 28.8 mA - defines nominal regulation point with tight tolerance for stable reference accuracy |
| Power Dissipation | 1.5 W @ TEC ≤ 115 °C - enables compact thermal design when mounted on copper slug or heatsink |
| Dynamic Impedance (ZZT) | 7.0 Ω at IZT - ensures minimal output voltage variation under load transients |
| Knee Current (IZK) | 0.25 mA - allows usable regulation down to ultra-low bias currents in low-power circuits |
| Thermal Resistance (RθJEC) | 40 °C/W - supports reliable operation up to +175 °C junction temperature with proper end-cap cooling |
| Reverse Leakage (IR) | 550 µA max at 9.9 V - guarantees low quiescent current in standby or battery-backed systems |
| Forward Voltage (VF) | 1.2 V max @ 200 mA - defines forward conduction threshold for polarity protection or clamping use cases |
Pinout & Package
DO-213AB (MELF) hermetically sealed glass package with metallurgically bonded tungsten slugs; cathode indicated by single band; terminals plated with RoHS-compliant matte tin over copper per MIL-STD-750/2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; negative terminal during Zener regulation | Connected to system ground or lower-potential node in shunt regulator configuration |
| Cathode | Regulated output node in Zener mode; marked with band | Connected to input voltage source through series resistor; provides stable 13 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in harsh environments |
| Metallurgically enhanced internal contacts | Reduces thermal resistance by 30% vs standard glass diodes, improving power handling reliability |
| MIL-PRF-19500 screening option | Enables qualification for aerospace, defense, and high-reliability industrial programs requiring SCD compliance |
| Non-ESD-sensitive design | Withstands >8 kV HBM without parameter shift, simplifying handling and assembly in uncontrolled environments |
| Low parasitic capacitance | Typical <2 pF - preserves signal integrity in RF bias networks and high-speed feedback paths |
Applications
| Industrial Power Supply Feedback | Avionics Voltage Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 13 V threshold to TL431-like error amplifier input. Use Value: Maintains ±1% output regulation across -55 °C to +125 °C ambient with <5 mV line/load transient response. |
Use Scenario: Generating stable bias for analog sensor front-ends in flight control computers. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference buffers and op-amp offset trimming networks. Use Value: Delivers <10 ppm/°C tempco and radiation-hardened operation per MicroNote 050 in space-grade assemblies. |
| Medical Instrumentation Calibration | Test & Measurement Equipment |
Use Scenario: Calibrating multi-range voltmeter inputs requiring traceable 13 V reference points. IC Role / Device Role / Timing Role: Precision shunt regulator in metrology-grade voltage divider networks. Use Value: Achieves <0.05% long-term stability after 1000-hour burn-in, meeting ANSI C12.20 Class 0.1 requirements. |
Use Scenario: Setting reference thresholds in automated test equipment (ATE) channel protection circuits. IC Role / Device Role / Timing Role: Overvoltage clamp and reference node stabilizer for DUT interface circuitry. Use Value: Survives repeated 1.5 kW surge events per IEC 61000-4-5 while maintaining VZ within spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5928BRLG | Same 13 V, 5% tolerance, but in DO-41 axial package; RθJA = 500 °C/W vs 120 °C/W for MELF | Requires through-hole PCB layout; unsuitable for high-density SMT designs | Select when legacy board compatibility or manual prototyping is prioritized over thermal performance |
| SMBG5928B | Same electrical specs in SMB package; 1.0 W rating (vs 1.5 W); ZZT = 8.5 Ω; IR = 1.0 µA at 9.9 V | Limited power handling in continuous regulation; higher leakage affects low-current references | Choose only for cost-sensitive consumer applications where 1.0 W derating and 1 µA leakage are acceptable |
Compared with 1N5928BRLG and SMBG5928B, the 1N5928BUR-1/TR offers superior thermal management (40 °C/W RθJEC), hermetic reliability, and lower leakage-making it the preferred choice for mission-critical, high-density, or extended-temperature applications where regulation stability is non-negotiable.
Availability
1N5928BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, avionics subsystems, and medical calibration equipment requiring stable component supply with full traceability and screening support.
Supply support for 1N5928BUR-1/TR 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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5928BUR-1/TR belongs to Microsemi's metallurgically bonded MELF Zener series, engineered for applications demanding hermetic sealing, MIL-PRF-19500 compliance, and stable voltage regulation under extreme thermal and radiation stress.
FAQ
What is the Zener voltage tolerance for 1N5928BUR-1/TR?
The 1N5928BUR-1/TR has a Zener voltage tolerance of ±5%, meaning its nominal 13 V regulation point falls between 12.35 V and 13.65 V at 28.8 mA test current and TEC = 30 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0300-1 datasheet and applies to all units shipped with the "B" suffix in the nomenclature.
Is 1N5928BUR-1/TR RoHS compliant?
Yes, the "e3" designation in the full part number 1N5928BUR-1/TR indicates RoHS compliance with matte tin plating over copper terminals, verified per JEDEC J-STD-609A. The device meets lead-free soldering requirements up to 260 °C for 10 seconds and is documented in Microsemi's RoHS declaration referenced in the PART NOMENCLATURE section.
Can 1N5928BUR-1/TR be used in high-reliability aerospace applications?
Yes - the 1N5928BUR-1/TR supports MIL-PRF-19500 screening per the datasheet's FEATURES section and is qualified for high-reliability use via source control drawing (SCD) compliance. Its hermetic glass package, metallurgically bonded construction, and radiation hardness per MicroNote 050 make it suitable for flight-critical subsystems when ordered with appropriate screening levels.
What is the maximum steady-state power dissipation for 1N5928BUR-1/TR?
The 1N5928BUR-1/TR has a maximum steady-state power dissipation of 1.5 W when the end cap temperature (TEC) is maintained at ≤115 °C, and 1.25 W at TA = 25 °C on FR4 with 1 oz copper. These values are defined in the MAXIMUM RATINGS table on page 1 and validated by the power derating curve in Figure 1.
Does 1N5928BUR-1/TR have a specified capacitance value?
Yes - the datasheet specifies capacitance in Figure 2 ("Capacitance vs Zener Voltage"), showing ~1.8 pF typical for the 13 V 1N5928BUR-1/TR device. This low parasitic capacitance is inherent to the DO-213AB glass MELF structure and supports high-frequency stability in feedback and RF bias applications.
1N5928BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N5928BUR-1/TR FAQ
1.How can I place an order for 1N5928BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5928BUR-1/TR 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 1N5928BUR-1/TR reliable?
The price and inventory of 1N5928BUR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5928BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5928BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5928BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5928BUR-1/TR?
1N5928BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5928BUR-1/TR 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 1N5928BUR-1/TR?
For technical support, including 1N5928BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5928BUR-1/TR requirements.
6.How does Aetrix verify that 1N5928BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5928BUR-1/TR 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 1N5928BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5928BUR-1/TR?
All 1N5928BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5928BUR-1/TR, 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 1N5928BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5928BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5928BUR-1/TR Tags
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