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

Microchip Technology 1N5524UR-1/TR

Name: 1N5524UR-1/TR
Brand: Microchip Technology
SKU: 1N5524UR-1/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5524UR-1/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-213AA

Datasheet:: 1N5524UR-1/TR.pdf

Description:: DIODE ZENER 5.6V 500MW DO213AA

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Product details

Overview

1N5524UR-1/TR from Microsemi is a 0.5 W glass MELF surface-mount Zener diode with nominal 5.6 V regulation at 3.0 mA test current, ±5% tolerance (B suffix), 30 Ω dynamic impedance at IZT, and maximum reverse leakage of 2.0 µA at 4.5 V. It operates from –65 °C to +175 °C and is qualified to MIL-PRF-19500/437 JANTX level for aerospace voltage reference and biasing applications.

For engineers reviewing the 1N5524UR-1/TR datasheet, 1N5524UR-1/TR pinout, 1N5524UR-1/TR application, or 1N5524UR-1/TR equivalent, this page delivers verified electrical specs, military-grade reliability context, thermal derating guidance, and direct alternatives for precision low-power Zener regulation in harsh-environment analog circuits.

Technical Context

This device functions as a low-noise, hermetically sealed voltage reference in the 5.6 V range, optimized for stable regulation across wide temperature extremes (–65 °C to +175 °C) and low operating currents (IZL = 0.25 mA). Its DO-213AA (MELF) package provides minimal capacitance (~8 pF at 0 V) and inherent radiation hardness per MicroNote 050.

Designed for DC voltage regulation and biasing, it features metallurgical bonding for enhanced thermal stability and reliability under thermal cycling. The cathode band marking and end-cap polarity define unidirectional Zener operation with banded end positive during regulation, and its RoHS-compliant matte-tin plating supports lead-free reflow up to 260 °C for 10 s.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage (V_Z)	5.6 V at 3.0 mA - defines precise regulation point for low-current reference circuits
Zener Tolerance	±5% (B suffix) - ensures tight voltage accuracy without binning or trimming
Power Rating (P_D)	0.5 W - supports stable operation up to 89 mA max DC current (I_ZM) at 25 °C ambient
Dynamic Impedance (Z_ZT)	30 Ω at I_ZT - enables low-voltage drift under varying load conditions
Reverse Leakage (I_R)	2.0 µA at 4.5 V - guarantees minimal parasitic current in high-impedance bias networks
Junction Temperature Range	–65 °C to +175 °C - validated for extended operation in aerospace, downhole, and military systems
Noise Density (N_D)	0.30 µV/√Hz - supports low-noise analog signal conditioning and precision references

Pinout & Package

DO-213AA (MELF/SOD80/MLL34) hermetically sealed glass package with axial symmetry and cathode indicated by a single black band. End-cap terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (banded end)	Zener anode connection during forward bias; regulated output node during reverse breakdown	Must be held positive relative to anode to enable Zener conduction; defines polarity for PCB layout and schematic symbol orientation
Anode (unbanded end)	Reference ground or return path during regulation	Serves as circuit common for bias networks; requires low-impedance connection to minimize regulation error from series resistance

Key Features

Feature	Design Value
Internal metallurgical bond	Improves thermal coupling between junction and end cap, reducing thermal resistance and enhancing long-term stability under power cycling
JANTX qualification per MIL-PRF-19500/437	Validates reliability for mission-critical applications including avionics, satellite subsystems, and defense electronics
Hermetic glass MELF construction	Eliminates moisture ingress and intermetallic degradation, enabling >20-year shelf life and operation in high-humidity or vacuum environments
Low noise density (0.30 µV/√Hz)	Minimizes added noise in precision analog front-ends, such as sensor signal chains and ADC reference buffers
Nonsensitive to ESD (MIL-STD-750 Method 1020)	Allows handling and assembly without special ESD controls, reducing manufacturing overhead in Class 0–100 cleanrooms

Applications

Avionics Power Sequencing	Satellite Sensor Biasing
Use Scenario: Generating stable 5.6 V reference for sequencing logic in flight control computers during cold-start and thermal transient conditions. IC Role / Device Role / Timing Role: Precision Zener voltage reference providing regulated bias to comparator inputs and reset generators. Use Value: Maintains regulation within ±5% over –65 °C to +125 °C while delivering sub-µA leakage, ensuring deterministic startup timing across orbital thermal cycles.	Use Scenario: Supplying calibrated bias voltage to radiation-hardened CMOS image sensor pixel arrays in LEO satellites. IC Role / Device Role / Timing Role: Low-noise, radiation-tolerant Zener regulator establishing fixed analog reference for pixel ADC offset correction. Use Value: Delivers 0.30 µV/√Hz noise floor and inherent radiation hardness per MicroNote 050, preserving SNR in high-dose environments.
Downhole Instrumentation	Military Radio RF Stage Bias
Use Scenario: Regulating supply to pressure transducer signal conditioners deployed in oil/gas wellbores exceeding 150 °C. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference maintaining calibration integrity under sustained 175 °C junction stress. Use Value: Sustains 5.6 V regulation with <30 Ω dynamic impedance up to +175 °C, eliminating need for active compensation circuitry.	Use Scenario: Providing stable gate bias to GaN HEMT drivers in tactical HF/VHF transceivers subject to vibration and thermal shock. IC Role / Device Role / Timing Role: Low-capacitance (8 pF) Zener clamp protecting RF stage inputs from ESD and overvoltage events. Use Value: Combines 2.0 µA leakage at 4.5 V with minimal junction capacitance to avoid detuning RF matching networks.

Avionics Power Sequencing

Satellite Sensor Biasing

Use Scenario: Generating stable 5.6 V reference for sequencing logic in flight control computers during cold-start and thermal transient conditions.

IC Role / Device Role / Timing Role: Precision Zener voltage reference providing regulated bias to comparator inputs and reset generators.

Use Value: Maintains regulation within ±5% over –65 °C to +125 °C while delivering sub-µA leakage, ensuring deterministic startup timing across orbital thermal cycles.

Use Scenario: Supplying calibrated bias voltage to radiation-hardened CMOS image sensor pixel arrays in LEO satellites.

IC Role / Device Role / Timing Role: Low-noise, radiation-tolerant Zener regulator establishing fixed analog reference for pixel ADC offset correction.

Use Value: Delivers 0.30 µV/√Hz noise floor and inherent radiation hardness per MicroNote 050, preserving SNR in high-dose environments.

Downhole Instrumentation

Military Radio RF Stage Bias

Use Scenario: Regulating supply to pressure transducer signal conditioners deployed in oil/gas wellbores exceeding 150 °C.

IC Role / Device Role / Timing Role: High-temperature-stable Zener reference maintaining calibration integrity under sustained 175 °C junction stress.

Use Value: Sustains 5.6 V regulation with <30 Ω dynamic impedance up to +175 °C, eliminating need for active compensation circuitry.

Use Scenario: Providing stable gate bias to GaN HEMT drivers in tactical HF/VHF transceivers subject to vibration and thermal shock.

IC Role / Device Role / Timing Role: Low-capacitance (8 pF) Zener clamp protecting RF stage inputs from ESD and overvoltage events.

Use Value: Combines 2.0 µA leakage at 4.5 V with minimal junction capacitance to avoid detuning RF matching networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5524US-1/TR	Same electrical specs but in DO-35 (axial-leaded) package; no MIL qualification; commercial grade only	Lacks JANTX qualification and hermetic MELF sealing; unsuitable for high-reliability or high-vibration environments	Select when cost-sensitive prototyping or through-hole assembly is required and military spec compliance is not mandated
BZX84-C5V6LT1G	Surface-mount SOT-23; ±5% tolerance; 200 mW rating; 40 Ω Z_ZT; 100 nA I_R at 4.5 V; commercial grade only	Lower power rating and higher dynamic impedance limit use in precision reference roles; lacks radiation hardness and MIL qualification	Choose for space-constrained consumer or industrial designs where ultra-low leakage outweighs regulation stability and ruggedness

Compared with 1N5524UR-1/TR, the 1N5524US-1/TR offers identical regulation but sacrifices hermeticity and qualification for lower cost and axial assembly, while BZX84-C5V6LT1G trades power handling and thermal robustness for footprint reduction and leakage performance in non-mission-critical systems.

Availability

1N5524UR-1/TR is available at Aetrix Electronics and suitable for avionics power sequencing, satellite sensor biasing, downhole instrumentation, and military radio RF stage bias requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N5524UR-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 1N55xxBUR-1 series was developed to meet MIL-PRF-19500/437 requirements for low-voltage Zener regulation in extreme-temperature, high-reliability analog subsystems across defense, space, and energy exploration markets.

FAQ

What is the Zener voltage tolerance of the 1N5524UR-1/TR?

The 1N5524UR-1/TR has a nominal Zener voltage of 5.6 V with a guaranteed ±5% tolerance, denoted by the "B" suffix in its part number. This tolerance is validated per MIL-PRF-19500/437 and applies across the full operating temperature range of –65 °C to +175 °C, ensuring predictable regulation in critical analog circuits without post-manufacture sorting.

Is the 1N5524UR-1/TR qualified for military applications?

Yes, the 1N5524UR-1/TR is qualified to JANTX level per MIL-PRF-19500/437, confirming compliance with rigorous environmental, reliability, and screening requirements for aerospace and defense systems. Its internal metallurgical bond, hermetic glass MELF package, and full parameter testing (V_Z, I_R, Z_ZT, ∆V_Z, I_ZL, I_ZM) support this qualification.

What is the maximum steady-state power dissipation for the 1N5524UR-1/TR?

The 1N5524UR-1/TR has a maximum steady-state power dissipation (P_D) of 0.5 W at ambient temperatures below 50 °C or end-cap temperatures below 125 °C. Derating begins linearly above these thresholds, reaching zero power at +175 °C, as defined in Figure 2 of the official datasheet T4-LDS-0037 Rev 2.

Does the 1N5524UR-1/TR have RoHS-compliant plating?

Yes, the 1N5524UR-1/TR is available with RoHS-compliant matte-tin plating on its end caps, designated by the "e3" suffix in the full part number (e.g., 1N5524BUR-1e3/TR). This plating meets JEDEC J-STD-020 reflow requirements and is solderable per MIL-STD-750 Method 2026, supporting lead-free assembly processes.

What does the "TR" suffix indicate in 1N5524UR-1/TR?

The "TR" suffix in 1N5524UR-1/TR indicates tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape. This format supports automated SMT placement and is the standard shipping configuration for volume orders; the device remains electrically and mechanically identical to the bulk or cut-tape versions.

1N5524UR-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):: 5.6 V

Tolerance:: ±20%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: 2 µA @ 3 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

1N5524UR-1/TR FAQ

1.How can I place an order for 1N5524UR-1/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5524UR-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 1N5524UR-1/TR reliable?

The price and inventory of 1N5524UR-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 1N5524UR-1/TR is usually 5 days.

3.What payment methods are accepted for 1N5524UR-1/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5524UR-1/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5524UR-1/TR?

1N5524UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5524UR-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 1N5524UR-1/TR?

For technical support, including 1N5524UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5524UR-1/TR requirements.

6.How does Aetrix verify that 1N5524UR-1/TR is sourced from the original manufacturer or authorized distributors?

All 1N5524UR-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 1N5524UR-1/TR meets industry standards.

7.What is the process for return or replacement of 1N5524UR-1/TR?

All 1N5524UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5524UR-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 1N5524UR-1/TR part is unused and in its original packaging.

Return procedure for 1N5524UR-1/TR:

1.Submit a request within 90 days.

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

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