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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1N5224BUR-1/TR

Name: 1N5224BUR-1/TR
Brand: Microchip Technology
SKU: 1N5224BUR-1/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5224BUR-1/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-213AA

Datasheet:: 1N5224BUR-1/TR.pdf

Description:: DIODE ZENER 2.8V 500MW DO213AA

Quantity:: RFQ Add To RFQ list

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Inventory:329

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Product details

Overview

1N5224BUR-1/TR from Microsemi is a surface-mount 2.8 V, 5% tolerance Zener diode in DO-213AA (SOD-80/MELF) package, rated for 500 mW steady-state power dissipation, with 30 Ω dynamic impedance at 20 mA test current and 75 µA max reverse leakage at 0.95 V. It serves as a precision voltage reference or shunt regulator in low-power analog circuits.

For engineers reviewing the 1N5224BUR-1/TR datasheet, 1N5224BUR-1/TR pinout, 1N5224BUR-1/TR application, or 1N5224BUR-1/TR equivalent, key selection factors include its 2.8 V nominal Zener voltage, 5% tolerance (suffix "B"), hermetically sealed glass MELF construction, low capacitance (<2 pF typical), and MIL-PRF-19500 upscreening capability.

Technical Context

This device operates as a silicon planar Zener diode utilizing metallurgical bonding for stable breakdown characteristics. Its regulation occurs in reverse-biased avalanche mode with a specified test current of 20 mA and knee current of 0.25 mA, exhibiting a negative temperature coefficient of −0.080 %/°C across −65 °C to +175 °C junction range.

The DO-213AA package provides hermetic sealing and low thermal resistance (100 °C/W junction-to-end-cap), enabling reliable operation under thermal cycling and radiation-hardened environments per MicroNote 050. It is RoHS-compliant (e3 suffix) and ESD-insensitive per MIL-STD-750 Method 1020.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	2.8 V ±5% at 20 mA - defines precise shunt regulation point for biasing or reference generation
Power Dissipation P_D	0.5 W - limits continuous DC power handling on FR4 board with recommended footprint
Dynamic Impedance Z_ZT	30 Ω at I_ZT = 20 mA - determines output voltage stability under load current variation
Reverse Leakage I_R	75 µA max at V_R = 0.95 V - ensures minimal quiescent current in high-impedance reference paths
Junction Temp Range	−65 °C to +175 °C - supports operation in extended industrial and aerospace environments
Temp Coefficient αV_Z	−0.080 %/°C - enables predictable drift compensation in temperature-sensitive references
Forward Voltage V_F	1.1 V max at 200 mA - defines forward conduction threshold for polarity verification or protection use

Pinout & Package

DO-213AA (SOD-80 / MELF) hermetically sealed glass package with tin-lead or RoHS-compliant matte-tin end-cap plating; cathode indicated by single band; no discrete pins - terminals are axial end caps.

Pin/Terminal	Circuit Role	Design Meaning
Cathode End Cap	Regulated Output Terminal	Connected to higher-potential node during Zener operation; carries full regulation current
Anode End Cap	Reference Ground Terminal	Connected to lower-potential node; establishes reference potential for regulated output

Key Features

Feature	Design Value
Metallurgically bonded construction	Ensures long-term parameter stability and reduced parameter drift under thermal stress
Hermetic glass MELF packaging	Provides moisture immunity and reliability in harsh environments without conformal coating
Low capacitance (~1.8 pF typical)	Minimizes signal coupling and high-frequency loading in RF or fast-switching reference circuits
Radiation hardness per MicroNote 050	Enables use in space-grade and nuclear instrumentation applications without derating
MIL-PRF-19500 upscreening option	Supports qualification for military/aerospace programs requiring enhanced screening and traceability

Applications

Low-Power Voltage Reference	Overvoltage Clamp Protection
Use Scenario: Providing stable 2.8 V bias for op-amp input stages or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC operating point. Use Value: Delivers <±5% initial accuracy and <30 Ω dynamic impedance to maintain reference stability across 1–20 mA load range.	Use Scenario: Clamping transient overvoltage on 3.3 V logic supply rails during ESD events or inductive switching. IC Role / Device Role / Timing Role: Passive overvoltage protection element limiting rail excursion to ≤2.8 V + diode drop. Use Value: Responds within nanoseconds with 75 µA leakage at 0.95 V, minimizing standby power loss while clamping >10 kV HBM transients.
Temperature-Stable Bias Generator	Calibration Standard in Portable Test Equipment
Use Scenario: Generating temperature-compensated bias currents in precision current sources using matched transistor pairs. IC Role / Device Role / Timing Role: Zener voltage source with known −0.080 %/°C coefficient used in compensation networks. Use Value: Enables predictable drift cancellation when paired with positive-TC components, reducing total error to <0.1%/°C over −40 to +85 °C.	Use Scenario: Serving as internal calibration reference in handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Primary DC voltage standard traceable to factory characterization at 20 mA. Use Value: Maintains ±5% tolerance and <30 Ω Z_ZT across lifetime, supporting 0.1% measurement accuracy without recalibration.

Low-Power Voltage Reference

Overvoltage Clamp Protection

Use Scenario: Providing stable 2.8 V bias for op-amp input stages or ADC reference dividers in battery-powered sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC operating point.

Use Value: Delivers <±5% initial accuracy and <30 Ω dynamic impedance to maintain reference stability across 1–20 mA load range.

Use Scenario: Clamping transient overvoltage on 3.3 V logic supply rails during ESD events or inductive switching.

IC Role / Device Role / Timing Role: Passive overvoltage protection element limiting rail excursion to ≤2.8 V + diode drop.

Use Value: Responds within nanoseconds with 75 µA leakage at 0.95 V, minimizing standby power loss while clamping >10 kV HBM transients.

Temperature-Stable Bias Generator

Calibration Standard in Portable Test Equipment

Use Scenario: Generating temperature-compensated bias currents in precision current sources using matched transistor pairs.

IC Role / Device Role / Timing Role: Zener voltage source with known −0.080 %/°C coefficient used in compensation networks.

Use Value: Enables predictable drift cancellation when paired with positive-TC components, reducing total error to <0.1%/°C over −40 to +85 °C.

Use Scenario: Serving as internal calibration reference in handheld multimeters and portable oscilloscope front-ends.

IC Role / Device Role / Timing Role: Primary DC voltage standard traceable to factory characterization at 20 mA.

Use Value: Maintains ±5% tolerance and <30 Ω Z_ZT across lifetime, supporting 0.1% measurement accuracy without recalibration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5224B-1	Axial DO-35 package; identical electrical specs but larger footprint and manual assembly requirement	Suitable for through-hole prototyping or legacy board rework where SMT is unavailable	Select 1N5224B-1 only if board layout lacks SMT pads or hand-soldering is preferred
BZX55C2V7	2.7 V nominal, ±5% tolerance, 500 mW, DO-35 - 0.1 V lower V_Z, same power rating, non-hermetic epoxy package	Acceptable for cost-sensitive consumer applications where radiation hardness and hermeticity are not required	Choose BZX55C2V7 only for commercial-grade designs with relaxed environmental and reliability requirements

Compared with 1N5224BUR-1/TR, the 1N5224B-1 offers identical regulation performance in axial form for through-hole use, while BZX55C2V7 trades hermetic sealing and radiation tolerance for lower cost and wider distributor availability at a 0.1 V voltage offset.

Availability

1N5224BUR-1/TR is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp protection, temperature-stable bias generation, and portable test equipment calibration requiring stable component supply and long-lifecycle support.

Supply support for 1N5224BUR-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, radiation-hardened, and aerospace-grade analog and mixed-signal components.

The 1N5224BUR-1/TR belongs to Microsemi's legacy 1N52xxBUR-1 Zener series designed for precision voltage regulation in mission-critical industrial, defense, and space applications where hermeticity and parametric stability are essential.

FAQ

What is the Zener voltage tolerance of the 1N5224BUR-1/TR?

The 1N5224BUR-1/TR has a nominal Zener voltage of 2.8 V with a ±5% tolerance, indicated by the "B" in the part number per Microsemi's nomenclature. This tolerance is guaranteed at 25 °C with 20 mA test current and applies across the full operating temperature range unless otherwise derated per the datasheet's thermal curves.

Is the 1N5224BUR-1/TR RoHS compliant?

Yes, the 1N5224BUR-1/TR is RoHS compliant (e3 suffix), meeting EU Directive 2011/65/EU requirements. This compliance applies only to commercial-grade versions; military-screened variants (e.g., JAN, JANTX) are exempt and use tin-lead plating.

What does the "TR" suffix mean in 1N5224BUR-1/TR?

The "TR" suffix indicates tape-and-reel packaging per EIA-481-B standard, enabling automated SMT placement. The base part 1N5224BUR-1 is identical electrically and mechanically; "TR" denotes packaging format only, not a functional variant of the 1N5224BUR-1/TR.

Can the 1N5224BUR-1/TR be used in radiation-intensive environments?

Yes, the 1N5224BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, validated for total ionizing dose (TID) resilience in space and nuclear applications. Its metallurgically bonded glass construction contributes to this performance without requiring additional shielding or derating.

What is the maximum reverse leakage current for the 1N5224BUR-1/TR?

The maximum reverse leakage current for the 1N5224BUR-1/TR is 75 µA at 0.95 V reverse voltage and 25 °C, as specified in the Electrical Characteristics table. Leakage remains ≤100 µA across the full −65 °C to +175 °C junction temperature range per device characterization.

1N5224BUR-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):: 2.8 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 75 µA @ 1 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

1N5224BUR-1/TR FAQ

1.How can I place an order for 1N5224BUR-1/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5224BUR-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 1N5224BUR-1/TR reliable?

The price and inventory of 1N5224BUR-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 1N5224BUR-1/TR is usually 5 days.

3.What payment methods are accepted for 1N5224BUR-1/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5224BUR-1/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5224BUR-1/TR?

1N5224BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5224BUR-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 1N5224BUR-1/TR?

For technical support, including 1N5224BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5224BUR-1/TR requirements.

6.How does Aetrix verify that 1N5224BUR-1/TR is sourced from the original manufacturer or authorized distributors?

All 1N5224BUR-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 1N5224BUR-1/TR meets industry standards.

7.What is the process for return or replacement of 1N5224BUR-1/TR?

All 1N5224BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5224BUR-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 1N5224BUR-1/TR part is unused and in its original packaging.

Return procedure for 1N5224BUR-1/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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