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Microchip Technology 1N4573/TR
- Part No.:
- 1N4573/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4573/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:8,588
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Product details
Overview
1N4573/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 1.0 mA Zener test current, 0.001 %/°C temperature coefficient, and 100 Ω dynamic impedance at IZT. It delivers stable voltage reference performance across -55°C to +100°C operating range and is used in precision instrumentation calibration circuits.
For engineers reviewing the 1N4573/TR datasheet, 1N4573/TR pinout, 1N4573/TR application, or 1N4573/TR equivalent, key selection criteria include its ultra-low TC (0.001 %/°C), tight 6.4 V ±5% nominal tolerance, hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness, and ESD insensitivity per MIL-STD-750 Method 1020.
Technical Context
This device belongs to Microsemi's zero-temperature-coefficient Zener series engineered for minimal voltage drift over temperature. Its 6.4 V nominal Zener voltage is achieved via internal metallurgical bonding and optimized doping profiles to suppress TC across the specified operating current of 1.0 mA.
The 1N4573/TR operates with reverse-biased polarity (banded end positive), supports up to 500 mW power dissipation at 25°C lead temperature, and maintains <2.0 µA reverse leakage at 3 V - enabling high-accuracy biasing in low-power analog references and sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at 1.0 mA - defines nominal reference level for precision analog circuitry |
| Temperature Coefficient (αVZ) | 0.001 %/°C - ensures ≤0.064 mV/°C drift over -55°C to +100°C range |
| Zener Test Current (IZT) | 1.0 mA - optimal bias point for achieving specified TC and impedance |
| Dynamic Impedance (ZZT) | 100 Ω at IZT - limits AC error contribution in feedback loops and regulator references |
| Reverse Leakage (IR) | ≤2.0 µA at 3 V - preserves accuracy in high-impedance reference nodes |
| Operating Temperature Range | -55°C to +100°C - supports military-grade environmental operation without derating |
| Package | DO-7 (DO-204AA) - hermetically sealed glass axial package with tin-lead solderable leads |
Pinout & Package
DO-7 (DO-204AA) package: hermetically sealed glass case with two axial leads; cathode identified by black band; banded end is anode when operated as reference diode (reverse-biased configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (banded end) | Reference output node | Connected to higher potential in reverse-biased reference configuration; defines 6.4 V drop relative to cathode |
| Cathode (unbanded end) | Reference return / ground reference | Typically tied to system ground or regulated rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Temperature coefficient optimization | 0.001 %/°C enables sub-0.1 mV/°C drift in critical calibration systems |
| Hermetic DO-7 construction | Ensures long-term stability and reliability in harsh environments including aerospace and defense |
| MIL-PRF-19500/452 qualification path | Supports JANTX/JANTXV versions with "-1" suffix for certified military applications |
| ESD robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - eliminates need for external protection in handling |
| Tape-and-reel availability | "TR" suffix indicates EIA-296 compliant packaging for automated SMT-compatible axial insertion |
Applications
| High-Accuracy ADC Reference | Avionics Sensor Biasing |
|---|---|
Use Scenario: Provides stable 6.4 V reference for 16-bit SAR ADC front-end in flight control computers. IC Role / Device Role / Timing Role: Precision voltage reference source for analog input scaling and offset correction. Use Value: 0.001 %/°C TC ensures <±0.05 LSB error over full avionics temperature range (-55°C to +70°C). |
Use Scenario: Supplies excitation voltage to strain-gauge bridges in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Low-drift DC bias generator for ratiometric sensor signal conditioning. Use Value: Hermetic DO-7 package and -55°C to +100°C rating support operation in sealed, high-vibration airframe environments. |
| Calibration Equipment Reference | Military Power Supply Trim |
Use Scenario: Serves as primary reference in handheld multimeter calibration standards. IC Role / Device Role / Timing Role: Primary voltage standard traceable to NIST via metrology-grade stability. Use Value: 6.4 V ±5% initial tolerance and <2 µA leakage enable <0.01% absolute accuracy after factory trim. |
Use Scenario: Sets output voltage in radiation-tolerant DC-DC converters for satellite subsystems. IC Role / Device Role / Timing Role: Adjustable feedback reference node in isolated flyback controller loop. Use Value: MIL-PRF-19500/452 qualification path allows direct upgrade to JANTXV1N4573A-1 for space-grade designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4572A/TR | Same DO-7 package, 1.0 mA IZT, but 0.002 %/°C TC (double that of 1N4573/TR) | Higher TC reduces suitability for wide-temperature calibration equipment | Select when tighter TC is not required and cost sensitivity favors legacy stock |
| 1N4574A/TR | Same DO-7 package, 1.0 mA IZT, but 0.0005 %/°C TC (one-fifth that of 1N4573/TR) | Lower TC supports ultra-high-stability metrology applications but increases unit cost | Select when sub-0.03 mV/°C drift is mandatory and budget permits premium grade |
Compared with 1N4572A/TR and 1N4574A/TR, the 1N4573/TR offers balanced TC performance (0.001 %/°C) and cost for mid-tier precision instrumentation - avoiding over-specification while maintaining sufficient stability for industrial-grade calibrators and avionics sensors.
Availability
1N4573/TR is available at Aetrix Electronics and suitable for precision instrumentation calibration, avionics sensor biasing, and military power supply trimming requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4573/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4573/TR belongs to Microsemi's legacy 1N45xx series of temperature-compensated Zener reference diodes, designed specifically for applications demanding long-term voltage stability under extreme thermal and environmental stress.
FAQ
What is the Zener voltage tolerance of the 1N4573/TR?
The 1N4573/TR has a nominal Zener voltage of 6.4 V with a tolerance of ±5% at 1.0 mA test current, as specified in the Electrical Characteristics table. Tighter tolerances (e.g., ±1%, ±2%) are available via custom ordering with suffixes like "-1%" or "-2%", but the base 1N4573/TR conforms to the standard JEDEC 1N4573 specification.
Does the 1N4573/TR require external heat sinking?
No, the 1N4573/TR does not require external heat sinking under normal operation. Its 500 mW maximum power dissipation rating at 25°C lead temperature is sufficient for typical reference use at 1.0 mA, where power dissipation remains below 6.4 mW. Thermal design should ensure lead temperature stays within limits if ambient exceeds 70°C or PCB copper area is minimal.
Is the 1N4573/TR suitable for surface-mount assembly?
The 1N4573/TR uses a DO-7 axial-leaded package and is not a surface-mount device. However, Microsemi offers surface-mount equivalents such as the JANTX1N4569AUR-1 in DO-213AA for automated placement. The "TR" suffix on 1N4573/TR indicates tape-and-reel packaging for axial insertion equipment, not SMT compatibility.
How does the temperature coefficient of the 1N4573/TR compare to standard Zeners?
The 1N4573/TR achieves a temperature coefficient of 0.001 %/°C - significantly lower than standard 6.2 V Zeners (typically 0.05–0.1 %/°C). This 50× improvement minimizes voltage drift over temperature, making the 1N4573/TR appropriate for applications where reference stability across -55°C to +100°C is critical, unlike general-purpose Zeners used only for basic regulation.
Can the 1N4573/TR be used in radiation-prone environments?
The base 1N4573/TR is not radiation-hardened. However, Microsemi offers radiation-tolerant variants under the RH prefix (e.g., RH4573A) and military-qualified versions (JANTXV1N4573A-1) meeting MIL-PRF-19500/452. For space or nuclear applications, those qualified derivatives - not the commercial 1N4573/TR - must be selected and verified per mission-specific TID and SEE requirements.
1N4573/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 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-7
1N4573/TR FAQ
1.How can I place an order for 1N4573/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4573/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 1N4573/TR reliable?
The price and inventory of 1N4573/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4573/TR is usually 5 days.
3.What payment methods are accepted for 1N4573/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4573/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4573/TR?
1N4573/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4573/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 1N4573/TR?
For technical support, including 1N4573/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4573/TR requirements.
6.How does Aetrix verify that 1N4573/TR is sourced from the original manufacturer or authorized distributors?
All 1N4573/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 1N4573/TR meets industry standards.
7.What is the process for return or replacement of 1N4573/TR?
All 1N4573/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4573/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 1N4573/TR part is unused and in its original packaging.
Return procedure for 1N4573/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4573/TR Tags
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