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Microchip Technology 1N4575A
- Part No.:
- 1N4575A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4575A.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,209
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Product details
Overview
1N4575A from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 2.0 mA test current, ±0.01 %/°C temperature coefficient, 50 Ω dynamic impedance, and operating temperature range of –65 °C to +175 °C. It delivers high-stability voltage reference for precision instrumentation calibration circuits.
For engineers reviewing the 1N4575A datasheet, 1N4575A pinout, 1N4575A application, or 1N4575A equivalent, key selection criteria include its 6.4 V nominal Zener voltage with ±5% tolerance, low TC of 0.01 %/°C, 2.0 mA IZT, 50 Ω ZZT, and hermetically sealed DO-7 package suitable for military-grade thermal stability requirements.
Technical Context
The 1N4575A uses internal metallurgical bonding to achieve stable Zener breakdown at 6.4 V with minimal voltage drift over temperature. Its temperature coefficient of ±0.01 %/°C is optimized for operation between –55 °C and +100 °C, with test current fixed at 2.0 mA per JEDEC specification.
This device operates as a two-terminal, cathode-banded reference diode requiring reverse bias (banded end positive), with maximum DC power dissipation of 500 mW at 25 °C lead temperature and 30 mW recommended for optimal TC performance. It meets MIL-PRF-19500/452 when ordered with JAN/JANTX/JANTXV prefixes and "–1" suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at IZT = 2.0 mA - defines primary reference accuracy under standard test conditions |
| Temperature Coefficient (αVZ) | ±0.01 %/°C - ensures <0.64 mV/°C drift over –55 °C to +100 °C operating range |
| Zener Test Current (IZT) | 2.0 mA - required bias current to achieve specified VZ and αVZ performance |
| Dynamic Impedance (ZZT) | 50 Ω at IZT = 2.0 mA - determines AC regulation sensitivity and noise rejection capability |
| Max Reverse Current (IR) | 2.0 µA at 3 V - confirms low leakage below breakdown, critical for high-impedance reference nodes |
| Operating Temperature Range | –65 °C to +175 °C - supports extended-range industrial and aerospace environments |
| Package | DO-7 (DO-204AA) - hermetically sealed glass axial-leaded package with tin-lead solderable leads |
Pinout & Package
DO-7 (DO-204AA) package: hermetically sealed glass case with axial leads; cathode identified by black band; leads tin-lead plated per MIL-STD-750 Method 2026; weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower potential node in reverse-biased reference configuration |
| Cathode | Banded lead | Connected to regulated reference voltage node; must be held at higher potential than anode during operation |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener structure | ±0.01 %/°C TC enables <±0.75 mV total drift across –55 °C to +100 °C |
| Internal metallurgical bond | Enhances long-term stability and reduces parameter shift under thermal cycling |
| Hermetic DO-7 glass package | Provides moisture immunity and reliability for high-reliability military/aerospace use |
| MIL-PRF-19500/452 qualification path | Enables JANTX/JANTXV versions (e.g., JANTX1N4575A-1) for defense applications |
| ESD robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - no special handling required |
Applications
| High-Accuracy ADC Reference | Avionics Power Supply Trim |
|---|---|
|
Use Scenario: Precision analog-to-digital conversion in flight control sensor interfaces where reference stability directly impacts measurement fidelity. IC Role / Device Role / Timing Role: Primary 6.4 V voltage reference for SAR ADC reference buffer stage. Use Value: ±0.01 %/°C TC and 50 Ω ZZT minimize code-width variation across –55 °C to +100 °C operational envelope. |
Use Scenario: Feedback reference in triple-redundant 28 V DC-DC converters powering mission-critical avionics subsystems. IC Role / Device Role / Timing Role: Stable Zener reference for error amplifier input in isolated flyback feedback loop. Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating ensure reliability under rapid thermal transients and vibration. |
| Calibration Standard for Bench Equipment | Nuclear Instrumentation Signal Conditioning |
|
Use Scenario: On-board self-calibration reference in portable multimeters and source-measure units requiring traceable 6.4 V baseline. IC Role / Device Role / Timing Role: Primary reference element in auto-zeroing and gain-calibration circuitry. Use Value: 2.0 mA IZT and low ZZT allow stable biasing from low-noise current sources without significant loading error. |
Use Scenario: Bias reference for photomultiplier tube (PMT) high-voltage supply feedback in radiation detection systems. IC Role / Device Role / Timing Role: Temperature-stable reference for HV regulator setpoint in harsh gamma/neutron environments. Use Value: MIL-qualified variants support JANTXV-level radiation tolerance and long-term parametric stability under continuous exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4574A | Same 6.4 V nominal, but ±0.0005 %/°C TC and 1.0 mA IZT; ZZT = 100 Ω | Better TC suited for ultra-stable lab standards; lower IZT reduces power in low-current designs | Select 1N4574A when sub-0.1 mV/°C drift is mandatory and 100 Ω ZZT is acceptable |
| 1N4576A | Same 6.4 V nominal and 2.0 mA IZT, but ±0.005 %/°C TC and ZZT = 50 Ω | Lower TC than 1N4575A with identical bias and impedance - tighter thermal tracking | Choose 1N4576A when improved TC (0.005 %/°C vs. 0.01 %/°C) is needed without changing layout or bias network |
Compared with 1N4574A and 1N4576A, the 1N4575A offers a balanced trade-off: higher TC than 1N4576A but lower ZZT than 1N4574A, making it optimal for applications needing moderate TC control with superior AC regulation.
Availability
1N4575A is available at Aetrix Electronics and suitable for high-reliability instrumentation calibration, avionics power supply trim, and nuclear instrumentation signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4575A 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and precision analog components for defense, aerospace, and industrial markets.
The 1N4575A belongs to Microsemi's Scottsdale Division legacy Zener reference diode family, engineered specifically for applications demanding ultra-stable voltage references under extreme thermal and environmental stress.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4575A?
The 1N4575A has a nominal Zener voltage of 6.4 V with a standard tolerance of ±5% at 2.0 mA test current. Tighter tolerances (e.g., ±1%, ±2%) are available via custom ordering with suffixes like "–1%" or "–2%" added to the part number, per Microsemi's datasheet note 1.
What is the temperature coefficient specification for the 1N4575A?
The 1N4575A exhibits a temperature coefficient of ±0.01 %/°C over the –55 °C to +100 °C range, corresponding to ±0.64 mV/°C drift. This value is measured at 2.0 mA and reflects its temperature-compensated Zener design optimized for minimal voltage change with ambient shifts.
Is the 1N4575A suitable for military applications?
Yes - the 1N4575A can be ordered in qualified military versions (e.g., JANTX1N4575A-1) meeting MIL-PRF-19500/452 requirements. These variants include enhanced screening, traceability, and extended temperature validation, while retaining the same 6.4 V, 2.0 mA, and ±0.01 %/°C characteristics as the commercial 1N4575A.
What package type does the 1N4575A use, and what are its key mechanical features?
The 1N4575A uses the DO-7 (DO-204AA) hermetically sealed glass axial-leaded package. Key features include tin-lead solderable leads per MIL-STD-750 Method 2026, cathode identification via black band, 0.2 g mass, and compatibility with 260 °C soldering for 10 seconds - all confirmed in Microsemi's official datasheet Rev B.
How does the 1N4575A differ from the 1N4575 (non-A) variant?
The 1N4575A differs from the base 1N4575 in tighter electrical binning: the "A" suffix denotes improved temperature coefficient control (±0.01 %/°C vs. unspecified for non-A), consistent 2.0 mA IZT, and guaranteed 50 Ω ZZT. Per Microsemi's documentation, the "A" grade is the preferred version for precision applications requiring verified TC and impedance specs.
1N4575A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4575A FAQ
1.How can I place an order for 1N4575A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4575A 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 1N4575A reliable?
The price and inventory of 1N4575A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4575A is usually 5 days.
3.What payment methods are accepted for 1N4575A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4575A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4575A?
1N4575A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4575A 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 1N4575A?
For technical support, including 1N4575A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4575A requirements.
6.How does Aetrix verify that 1N4575A is sourced from the original manufacturer or authorized distributors?
All 1N4575A 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 1N4575A meets industry standards.
7.What is the process for return or replacement of 1N4575A?
All 1N4575A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4575A, 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 1N4575A part is unused and in its original packaging.
Return procedure for 1N4575A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4575A Tags
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