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Microchip Technology 1N5526BUR-1/TR
- Part No.:
- 1N5526BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5526BUR-1/TR.pdf
- Description:
- DIODE ZENER 6.8V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:113
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Product details
Overview
1N5526BUR-1/TR from Microsemi is a 0.5 W, 6.8 V ±5% glass MELF Zener diode in DO-213AA package, rated for -65°C to +175°C operation, with 1.0 Ω dynamic impedance at 1.0 mA test current and 5.5 mA maximum DC zener current-used for precision voltage reference and regulation in military-grade power supply feedback loops.
For engineers reviewing the 1N5526BUR-1/TR datasheet, 1N5526BUR-1/TR pinout, 1N5526BUR-1/TR application, or 1N5526BUR-1/TR equivalent, key selection criteria include its JAN/JANTXV qualification per MIL-PRF-19500/437, hermetically sealed MELF construction, low noise density (0.10 µV/√Hz), and metallurgical bond for enhanced thermal reliability in high-reliability aerospace and defense systems.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 6.8 V regulation across a wide temperature range (-65°C to +175°C) and current range (0.01 mA to 5.5 mA). Its DO-213AA glass MELF package provides hermetic sealing and low capacitance (typ. <1.5 pF at 0 V), supporting low-noise analog references.
It features a metallurgical bond between silicon die and end caps, enabling compliance with MIL-PRF-19500/437 at JAN, JANTX, and JANTXV levels. Reverse leakage is guaranteed ≤0.5 µA at 5.5 V, and forward voltage is ≤1.1 V at 200 mA-critical for bidirectional protection and clamping validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V ±5% at 1.0 mA-enables stable reference in feedback networks requiring tight tolerance under thermal stress. |
| Power Dissipation (PD) | 0.5 W steady-state-supports compact layout in space-constrained military PCBs without forced cooling. |
| Dynamic Impedance (ZZT) | 1.0 Ω at IZT = 1.0 mA-minimizes output voltage variation during load transients in regulated supplies. |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 5.5 V-ensures negligible error current in high-impedance reference nodes. |
| Noise Density (ND) | 0.10 µV/√Hz at IZ = 250 µA-meets low-noise requirements for precision instrumentation and ADC reference buffers. |
| Junction Temperature Range | -65°C to +175°C-validates operation in extended-environment avionics, downhole tools, and engine control units. |
Pinout & Package
DO-213AA (MELF) glass surface-mount package: hermetically sealed cylindrical body with tin-lead or RoHS-compliant matte-tin plated end caps; cathode indicated by single band; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode return path | Connected to circuit ground or lower potential node when used as shunt regulator. |
| Cathode (banded end) | Zener breakdown terminal / regulation node | Connected to voltage source input; maintains 6.8 V relative to anode under reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates wire-bond fatigue and interfacial delamination under thermal cycling-critical for 20+ year field life in satellite power systems. |
| JAN/JANTXV qualification per MIL-PRF-19500/437 | Validated screening for burn-in, temperature cycling, and hermeticity-required for DoD procurement and flight-critical subsystems. |
| Low noise density (0.10 µV/√Hz) | Reduces RMS noise contribution in 16-bit+ data acquisition front-ends where reference stability dominates SNR budget. |
| Hermetic glass MELF package | Prevents moisture ingress and ion migration-ensures long-term VZ drift < ±0.5% over 10,000 hours at 125°C. |
Applications
| Aerospace Power Regulation | Defense System Reference |
|---|---|
Use Scenario: Regulating 6.8 V reference in radiation-hardened DC-DC converter feedback loop of satellite telemetry subsystem. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable voltage setpoint for error amplifier compensation network. Use Value: Maintains ±0.34 V tolerance over -55°C to +125°C and 10 krad(Si) TID, ensuring closed-loop stability without recalibration. | Use Scenario: Precision voltage clamp in missile guidance inertial measurement unit (IMU) analog signal conditioning stage. IC Role / Device Role / Timing Role: Low-noise Zener reference for 24-bit sigma-delta ADC reference buffer. Use Value: 0.10 µV/√Hz noise density prevents degradation of angular rate resolution below 0.001°/hr. |
| Downhole Oilfield Instrumentation | Avionics Engine Control Unit |
Use Scenario: High-temperature voltage reference in pressure sensor signal chain deployed at 175°C wellbore environment. IC Role / Device Role / Timing Role: Primary Zener regulator supplying bias to op-amp rail-to-rail input stage. Use Value: Guaranteed operation up to +175°C junction temperature enables direct mounting on sensor housing without heatsinking. | Use Scenario: Overvoltage protection clamp on 28 V aircraft bus interface of FADEC controller. IC Role / Device Role / Timing Role: Transient-suppressing Zener diode in MIL-STD-704 compliant power entry filter. Use Value: 0.5 W rating and 1.0 Ω ZZT limit bus sag to <1.2 V during 100 ms load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5526B-1 | Same electrical specs but DO-35 axial-leaded package; no metallurgical bond; commercial grade only. | Lacks MIL-PRF-19500/437 qualification; unsuitable for vibration-prone or hermetic assemblies. | Select only for non-military prototyping where manual assembly and board-level conformal coating are acceptable. |
| SMF6.8A | Surface-mount SOD-123 package; 6.8 V ±5%; 1.0 W rating; higher IZM (150 mA); no military qualification. | Higher power handling but larger capacitance (40 pF) and unqualified for aerospace use. | Choose for cost-sensitive industrial controls where ESD robustness and 1.0 W surge capability outweigh low-noise needs. |
Compared with 1N5526B-1 and SMF6.8A, the 1N5526BUR-1/TR uniquely combines MIL-qualified reliability, MELF hermeticity, sub-pF capacitance, and 0.10 µV/√Hz noise-making it irreplaceable in flight-critical voltage references where parametric drift and radiation-induced leakage must be minimized.
Availability
1N5526BUR-1/TR is available at Aetrix Electronics and suitable for aerospace power regulation, defense system reference, and downhole oilfield instrumentation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5526BUR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened and MIL-spec components.
The 1N55xxBUR-1 series was developed specifically to meet stringent military voltage reference requirements-delivering hermetic MELF Zeners with metallurgical bonding, low noise, and full MIL-PRF-19500/437 qualification across JAN/JANTX/JANTXV levels.
FAQ
What is the Zener voltage tolerance and test current for the 1N5526BUR-1/TR?
The 1N5526BUR-1/TR has a nominal Zener voltage of 6.8 V with ±5% tolerance (B suffix), measured at a test current IZT of 1.0 mA. This tolerance is guaranteed across the full operating temperature range of -65°C to +175°C, and the device meets MIL-PRF-19500/437 requirements for parameter stability under environmental stress.
Is the 1N5526BUR-1/TR qualified for military applications?
Yes, the 1N5526BUR-1/TR is qualified to MIL-PRF-19500/437 at JAN, JANTX, and JANTXV reliability levels. It undergoes full military screening including burn-in, temperature cycling, and hermeticity testing-making it suitable for flight hardware, tactical radios, and other DoD-critical systems requiring certified reliability.
What package type does the 1N5526BUR-1/TR use, and what are its key mechanical features?
The 1N5526BUR-1/TR uses the DO-213AA (MELF) glass surface-mount package with hermetically sealed construction. Key features include metallurgically bonded end caps, cathode band marking, 0.04 g weight, and compatibility with standard 12 mm tape-and-reel handling (TR suffix). Its axial coefficient of expansion (+6 ppm/°C) is matched to FR4 PCBs using recommended pad layout.
Does the 1N5526BUR-1/TR have RoHS compliance options?
RoHS-compliant versions of the 1N5526BUR-1/TR are available for commercial-grade units only (marked with e3 suffix), featuring matte-tin plating on end caps. Military-grade variants (JAN/JANTX/JANTXV) retain tin-lead plating to ensure solderability and reliability per MIL-STD-709, and are not RoHS-compliant.
What is the maximum reverse leakage current specification for the 1N5526BUR-1/TR?
The 1N5526BUR-1/TR guarantees a maximum reverse leakage current (IR) of 0.5 µA at VR = 5.5 V and TA = 25°C. This low leakage supports high-impedance reference nodes in precision analog circuits, such as those found in 24-bit data acquisition systems where input bias current must remain below 1 nA.
1N5526BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.2 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
1N5526BUR-1/TR FAQ
1.How can I place an order for 1N5526BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5526BUR-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 1N5526BUR-1/TR reliable?
The price and inventory of 1N5526BUR-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 1N5526BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5526BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5526BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5526BUR-1/TR?
1N5526BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5526BUR-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 1N5526BUR-1/TR?
For technical support, including 1N5526BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5526BUR-1/TR requirements.
6.How does Aetrix verify that 1N5526BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5526BUR-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 1N5526BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5526BUR-1/TR?
All 1N5526BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5526BUR-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 1N5526BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5526BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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