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Microchip Technology 1N5269BUR-1
- Part No.:
- 1N5269BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5269BUR-1.pdf
- Description:
- DIODE ZENER 87V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,475
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Product details
Overview
1N5269BUR-1 from Microsemi is a 87 V, ±5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in power supply feedback, reference, and overvoltage protection circuits across industrial and aerospace applications.
For engineers reviewing the 1N5269BUR-1 datasheet, 1N5269BUR-1 pinout, 1N5269BUR-1 application, or 1N5269BUR-1 equivalent, key selection criteria include its 87 V nominal Zener voltage at 1.4 mA test current, 370 Ω dynamic impedance at IZT, -65°C to +175°C operating junction temperature, and hermetically sealed metallurgically bonded construction.
Technical Context
The 1N5269BUR-1 operates as a reverse-biased voltage reference with a specified Zener voltage of 87 V at 1.4 mA (IZT). Its dynamic impedance of 370 Ω at IZT and 2200 Ω near the knee (IZK = 0.25 mA) defines regulation stability under varying load currents.
It exhibits a positive temperature coefficient of +0.099 %/°C, indicating increasing VZ with temperature-critical for thermal drift compensation in precision references. The device is rated for 0.5 W steady-state dissipation with derating above 50°C ambient or 125°C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 87 V at 1.4 mA test current-defines primary regulation point in feedback loops. |
| Zener Tolerance | ±5% (B-suffix)-ensures VZ remains within 82.65–91.35 V at 25°C. |
| Dynamic Impedance (ZZT) | 370 Ω at IZT-quantifies AC resistance in breakdown; lower values improve regulation against current transients. |
| Max Reverse Leakage (IR) | 0.1 µA at 68 V (VR)-confirms minimal parasitic conduction below regulation threshold. |
| Power Dissipation (PD) | 0.5 W at TEC < 125°C or TA < 50°C-sets thermal design limits on PCB layout and heatsinking. |
| Temperature Coefficient (αVZ) | +0.099 %/°C-enables predictable VZ drift modeling across -65°C to +175°C junction range. |
| Forward Voltage (VF) | 1.1 V max at 200 mA-supports use as low-drop rectifier or clamp in dual-polarity designs. |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package with metallurgically bonded internal structure; cathode indicated by single band; terminals are solderable end caps per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node in Zener configuration | Connected to circuit common when regulating voltage at cathode; must handle full reverse current. |
| Cathode (banded end) | Regulated output node | Provides stable 87 V reference relative to anode; polarity critical-reverse bias only. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF packaging | Enables operation up to +175°C junction temperature and ensures long-term reliability in harsh environments. |
| Metallurgical bonding | Eliminates wire bonds, improving thermal conductivity and mechanical robustness versus epoxy-packaged Zeners. |
| MIL-PRF-19500 up-screening option | Supports high-reliability qualification for aerospace and defense programs requiring extended screening. |
| Low capacitance (typ. <1.5 pF) | Minimizes signal coupling and noise injection in high-frequency reference or RF bias applications. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050-suitable for space-grade analog subsystems. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 87 V threshold to TL431 shunt regulator or discrete error amplifier. Use Value: Enables tight output regulation (±1%) despite line/load variation, leveraging 87 V VZ and low 370 Ω ZZT. | Use Scenario: Providing stable excitation voltage for RTD or strain gauge bridge circuits in process control transmitters. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC biasing and offset calibration. Use Value: Delivers low-drift 87 V reference with +0.099 %/°C TC, minimizing temperature-induced measurement error. |
| Overvoltage Protection Clamp | Aerospace Power Bus Monitor |
Use Scenario: Clamping transient surges on 72 V DC bus in railway or telecom power systems. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting excess energy to ground during voltage spikes. Use Value: Responds within nanoseconds due to low junction capacitance (<1.5 pF), limiting peak voltage to ≤91.35 V. | Use Scenario: Monitoring 100 V aircraft power distribution bus for undervoltage/overvoltage alarms. IC Role / Device Role / Timing Role: High-temperature-stable reference input to comparator detecting deviations from nominal bus voltage. Use Value: Operates reliably from -65°C to +175°C and withstands radiation exposure per MicroNote 050. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5269B-1 | Same electrical specs but in axial DO-35 (JEDEC DO-204AH) package; no metallurgical bond; non-hermetic glass. | Limited to commercial-grade PCB through-hole assembly; unsuitable for high-vibration or hermetic sealing requirements. | Select 1N5269B-1 only if board-level mounting constraints favor axial leads and MIL-PRF-19500 screening is unnecessary. |
| BZX55-C82 | 82 V nominal VZ, ±5%, 500 mW, DO-35 package; higher ZZT (700 Ω); no radiation hardness or MIL screening support. | Lower voltage rating requires series stacking for 87 V; not qualified for aerospace or high-reliability use. | Choose BZX55-C82 only for cost-sensitive commercial applications where 5 V lower regulation and absence of radiation tolerance are acceptable. |
Compared with 1N5269B-1 and BZX55-C82, the 1N5269BUR-1 uniquely combines 87 V regulation, hermetic MELF packaging, metallurgical bonding, and inherent radiation hardness-making it the sole choice for high-reliability, high-temperature, or space-constrained surface-mount designs.
Availability
1N5269BUR-1 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamps, and aerospace power monitors requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5269BUR-1 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 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered for precision voltage reference and protection in mission-critical systems where hermeticity, temperature resilience, and long-term stability are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N5269BUR-1?
The 1N5269BUR-1 has a nominal Zener voltage of 87 V with a ±5% tolerance, corresponding to the "B" suffix in its part number. This means its actual VZ falls between 82.65 V and 91.35 V when measured at 1.4 mA and 25°C, as confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0232-1 datasheet.
Does the 1N5269BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5269BUR-1 supports up-screening per MIL-PRF-19500, as explicitly stated in the Features section of the datasheet. Screening options are encoded in the part nomenclature prefix (e.g., MQ, MX, MV, MSP), and the base 1N5269BUR-1 is the commercial-grade version that can be ordered with these enhanced reliability levels upon request.
What is the maximum power dissipation for the 1N5269BUR-1 and how does it derate with temperature?
The 1N5269BUR-1 has a steady-state power dissipation rating of 0.5 W at end-cap temperature <125°C or ambient temperature <50°C on FR4 board. Derating begins linearly beyond those points, as shown in Figure 2 of the datasheet-e.g., at 100°C ambient, usable power drops to ~0.25 W, ensuring safe junction temperature maintenance within -65°C to +175°C limits.
Is the 1N5269BUR-1 RoHS compliant?
Yes, RoHS-compliant versions of the 1N5269BUR-1 are available for commercial grade only, marked with the "e3" suffix (e.g., 1N5269BUR-1e3). The standard 1N5269BUR-1 is non-RoHS, using tin-lead plating; RoHS compliance requires explicit ordering with the e3 designation per the Part Nomenclature table on page 2.
What is the temperature coefficient of the 1N5269BUR-1 and how does it affect regulation accuracy?
The 1N5269BUR-1 has a temperature coefficient of +0.099 %/°C, meaning its Zener voltage increases by approximately 86 mV per °C rise in junction temperature. This predictable positive drift allows designers to compensate for thermal effects in high-precision references-especially critical in applications operating across -65°C to +175°C, where total VZ shift may reach ±15 V.
1N5269BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 87 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 370 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 68 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5269BUR-1 FAQ
1.How can I place an order for 1N5269BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5269BUR-1 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 1N5269BUR-1 reliable?
The price and inventory of 1N5269BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5269BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5269BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5269BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5269BUR-1?
1N5269BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5269BUR-1 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 1N5269BUR-1?
For technical support, including 1N5269BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5269BUR-1 requirements.
6.How does Aetrix verify that 1N5269BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5269BUR-1 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 1N5269BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5269BUR-1?
All 1N5269BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5269BUR-1, 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 1N5269BUR-1 part is unused and in its original packaging.
Return procedure for 1N5269BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5269BUR-1 Tags
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