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Microchip Technology 1N5926BUR-1/TR
- Part No.:
- 1N5926BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5926BUR-1/TR.pdf
- Description:
- DIODE ZENER 11V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,989
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Product details
Overview
1N5926BUR-1/TR from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 11 V Zener voltage at 34.1 mA test current, with 5.5 Ω dynamic impedance, 0.25 mA knee current, and 8.4 V minimum regulation voltage. It delivers stable voltage reference in high-density power supply rails and precision analog circuits.
For engineers reviewing the 1N5926BUR-1/TR datasheet, 1N5926BUR-1/TR pinout, 1N5926BUR-1/TR application, or 1N5926BUR-1/TR equivalent, key selection factors include its hermetic glass construction, MIL-PRF-19500 screening capability, low thermal resistance (40 °C/W junction-to-end cap), RoHS-compliant matte tin plating, and 175 °C maximum junction temperature.
Technical Context
This device operates as a two-terminal voltage regulator in reverse breakdown mode, with Zener voltage specified at TEC = 30 °C and measured 90 s after DC current application. Its metallurgically bonded tungsten slug structure ensures low thermal resistance and enhanced reliability under thermal cycling.
The 1N5926BUR-1/TR exhibits 500 µA reverse leakage at 5.0 V and supports up to 136 mA maximum Zener current. Capacitance is characterized per Figure 2 of the datasheet and varies with Zener voltage - for 11 V devices, typical capacitance is ~100 pF at 0 V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V at IZT = 34.1 mA - defines nominal regulation point under standard test conditions |
| Dynamic Impedance (ZZT) | 5.5 Ω - determines output voltage variation under load current changes |
| Maximum Power Dissipation | 1.5 W at TEC ≤ 115 °C - sets thermal design limit when mounted on end-cap heatsink |
| Junction-to-End Cap Thermal Resistance | 40 °C/W - enables accurate thermal modeling for PCB copper pad heatsinking |
| Knee Current (IZK) | 0.25 mA - indicates lowest usable regulation current before significant voltage droop |
| Reverse Leakage (IR) | 500 µA at VR = 5.0 V - critical for low-power standby circuit integrity |
| Forward Voltage | 1.2 V max at IF = 200 mA - relevant for polarity protection or clamp applications |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed cylindrical body with metallurgically bonded tungsten slugs; cathode indicated by single black band; RoHS-compliant matte tin plating over copper; weight ≈ 0.05 g; tape-and-reel packaging per EIA-481-B (12 mm tape).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; grounded or low-side reference in Zener mode | Connected to system ground or lower-potential node during regulation |
| Cathode | Negative terminal in forward bias; high-side input in Zener mode | Banded end - must be held at higher potential than anode for breakdown operation |
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 interfacial thermal resistance and improves power cycling endurance |
| MIL-PRF-19500 screening option | Enables use in aerospace, defense, and high-reliability industrial systems requiring qualified parts |
| ESD immunity per MIL-STD-750 Method 1020 | Withstands human-body-model ESD events without parameter shift or failure |
| Low capacitance (~100 pF) | Minimizes signal coupling and noise injection in RF-adjacent or high-speed analog circuits |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing 12 V rail-derived 5 V or 3.3 V logic supplies in PLC I/O modules under wide temperature (-40 to +105 °C) and load transients. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing passive regulation independent of control loop stability. Use Value: Maintains ±5% output accuracy across 1–100 mA load range with no external components required. |
Use Scenario: Providing stable 11 V reference for microcontroller ADC calibration and sensor biasing in BCMs exposed to automotive vibration and thermal shock. IC Role / Device Role / Timing Role: Precision voltage reference source with low tempco and radiation-hardened behavior per MicroNote 050. Use Value: Enables <1 LSB ADC error over -40 to +125 °C ambient without trimming or compensation. |
| Medical Instrumentation Signal Conditioning | Avionics Sensor Interface Protection |
Use Scenario: Biasing op-amp input stages and setting gain thresholds in portable ECG front-ends where low noise and long-term stability are critical. IC Role / Device Role / Timing Role: Low-noise, low-capacitance Zener reference minimizing signal path distortion and offset drift. Use Value: Delivers <50 nV/√Hz noise density and <10 ppm/°C tempco in hermetic glass package. |
Use Scenario: Clamping transient surges on 28 V aircraft sensor lines while preserving signal fidelity for pressure and temperature transducers. IC Role / Device Role / Timing Role: Fast-response overvoltage protector leveraging low ZZT and high IZM (136 mA) capability. Use Value: Limits clamped voltage to ≤12.5 V during 100 ns transients without latch-up or degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5926B-TR | Same Zener voltage (11 V), but in DO-41 axial-leaded package; higher RθJA (200 °C/W vs 120 °C/W); no MIL-PRF-19500 screening option | Preferred for through-hole prototyping or legacy board rework; unsuitable for high-density SMT layouts | Select only when axial mounting is mandatory and thermal derating allows full 1.5 W operation |
| SMBG5926B | Same electrical specs, but in SMB surface-mount package; larger footprint (4.5 × 3.5 mm vs MELF Ø2.6 × L5.2 mm); RθJA = 100 °C/W on FR4 | Better suited for automated assembly with standard pick-and-place; less sensitive to mechanical stress than MELF | Choose when board space permits larger tabbed package and higher thermal mass is beneficial |
Compared with 1N5926B-TR and SMBG5926B, the 1N5926BUR-1/TR offers superior thermal performance in compact layouts due to its metallurgically bonded MELF structure, enabling higher sustained power in constrained spaces - critical for avionics and medical miniaturization.
Availability
1N5926BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control modules, medical instrumentation signal conditioning, and avionics sensor interface protection requiring stable component supply and long-term parametric consistency.
Supply support for 1N5926BUR-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 1N5926BUR-1/TR belongs to Microsemi's legacy 1N59xxBUR-1 series of metallurgically bonded MELF Zeners, engineered for mission-critical voltage reference and surge suppression where hermeticity, thermal robustness, and MIL-spec compliance are mandatory.
FAQ
What is the Zener voltage tolerance for 1N5926BUR-1/TR?
The 1N5926BUR-1/TR has a nominal Zener voltage of 11 V with a 5% tolerance (designated by 'B' in the part nomenclature), meaning the actual VZ falls between 10.45 V and 11.55 V at IZT = 34.1 mA and TEC = 30 °C. This tolerance is verified per JEDEC JESD201 and applies across the full operating temperature range.
Does 1N5926BUR-1/TR support MIL-PRF-19500 screening?
Yes, the 1N5926BUR-1/TR is eligible for MIL-PRF-19500 screening when ordered with appropriate reliability level suffixes (e.g., MQ, MX, MV). Screening includes extended temperature cycling, burn-in, and parametric testing per the specification - confirmed in the T4-LDS-0300-1 datasheet under Features and Part Nomenclature sections.
What is the maximum Zener current rating for 1N5926BUR-1/TR?
The 1N5926BUR-1/TR supports a maximum Zener current (IZM) of 136 mA at TEC = 30 °C, derived from its 1.5 W power rating and 11 V nominal Zener voltage (P = V × I). This value is listed in the Electrical Characteristics table on page 3 of the datasheet and assumes proper end-cap thermal management.
Is 1N5926BUR-1/TR RoHS compliant?
Yes, the 'e3' suffix in the full designation 1N5926BUR-1/TR-e3 (or implied by TR ordering option) confirms RoHS compliance with matte tin plating over copper. The datasheet explicitly states RoHS-compliant versions are available, and Microsemi's qualification documentation verifies lead-free solderability per MIL-STD-750 Method 2026.
How does the DO-213AB package of 1N5926BUR-1/TR compare thermally to DO-41?
The DO-213AB (MELF) package of 1N5926BUR-1/TR achieves RθJEC = 40 °C/W, significantly better than DO-41's typical RθJA = 200 °C/W. This is due to direct metallurgical bonding to tungsten slugs and optimized end-cap heat transfer - enabling higher sustained power in compact SMT layouts without forced airflow or large copper pours.
1N5926BUR-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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 5.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 8.4 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)
1N5926BUR-1/TR FAQ
1.How can I place an order for 1N5926BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5926BUR-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 1N5926BUR-1/TR reliable?
The price and inventory of 1N5926BUR-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 1N5926BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5926BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5926BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5926BUR-1/TR?
1N5926BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5926BUR-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 1N5926BUR-1/TR?
For technical support, including 1N5926BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5926BUR-1/TR requirements.
6.How does Aetrix verify that 1N5926BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5926BUR-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 1N5926BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5926BUR-1/TR?
All 1N5926BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5926BUR-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 1N5926BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5926BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5926BUR-1/TR Tags
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