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Microchip Technology 1N825A/TR
- Part No.:
- 1N825A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N825A/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,865
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Product details
Overview
1N825A/TR from Central Semiconductor (CDI) is a temperature-compensated, hermetically sealed MELF zener diode with nominal zener voltage 6.2 V, 10 Ω zener impedance at 7.5 mA, and ±0.002 %/°C temperature coefficient. It operates from –65°C to +175°C and delivers stable reference voltage in precision analog power supplies and voltage regulation circuits.
For engineers reviewing the 1N825A/TR datasheet, 1N825A/TR pinout, 1N825A/TR application, or 1N825A/TR equivalent, key selection criteria include low-temperature drift, tight voltage tolerance, high-temperature survivability, and MELF package suitability for high-reliability surface-mount designs.
Technical Context
This device uses metallurgically bonded, double-plug construction to achieve superior thermal stability and low dynamic impedance. Its temperature coefficient of ±0.002 %/°C is measured over –55°C to +100°C per JEDEC Std 5, with zener impedance derived using 10% 60 Hz AC superimposed on DC test current.
The DO-213AA (MELF/SOD-80/LL34) glass package enables operation up to +175°C ambient, supported by 500 mW power dissipation at +50°C and linear derating of 4 mW/°C above that point. Reverse leakage is specified at 2 µA @ 3 Vdc.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.9–6.5 V @ IZT = 7.5 mA - tight tolerance supports precision reference design |
| Zener Impedance (ZZT) | 10 Ω @ 7.5 mA - low dynamic resistance ensures minimal output voltage variation under load transients |
| Temp. Coefficient (TC) | ±0.002 %/°C - ultra-low drift enables stable performance across industrial temperature range |
| Max Power Dissipation | 500 mW @ +50°C - sufficient headroom for compact PCB layouts without forced cooling |
| Operating Temp Range | –65°C to +175°C - qualified for aerospace, downhole, and high-temp industrial environments |
| Reverse Leakage (IR) | 2 µA @ 3 Vdc - negligible error contribution in high-impedance bias networks |
Pinout & Package
Package: DO-213AA (MELF), hermetically sealed glass case; axial leadless surface-mount package with tin/lead finish; cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during reverse breakdown | Connected to lower potential node; must be held ≤ VZ below cathode for regulation |
| Cathode | Current source terminal during reverse breakdown | Banded end; connected to higher potential node; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | ±0.002 %/°C TC enables <±1 mV drift over –55°C to +100°C in precision references |
| Hermetic MELF packaging | DO-213AA glass seal ensures long-term reliability and moisture immunity in harsh environments |
| Double-plug metallurgical bond | Minimizes thermal EMF and interfacial resistance for stable voltage output under thermal cycling |
| High-temperature rating | +175°C max operating temperature supports use in engine control, oil/gas, and avionics systems |
Applications
| Industrial Precision Reference | Aerospace Voltage Monitor |
|---|---|
Use Scenario: Stable 6.2 V reference in 24 V industrial PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for ADC biasing and DAC feedback. Use Value: ±0.002 %/°C TC and 10 Ω ZZT ensure <±2 mV total error over –40°C to +85°C operating range. | Use Scenario: Overvoltage detection circuit in satellite power management unit. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator triggering fault logic at 6.2 V threshold. Use Value: Hermetic DO-213AA package and –65°C to +175°C rating support radiation-tolerant, long-duration missions. |
| Downhole Sensor Biasing | Medical Imaging Power Supply |
Use Scenario: Bias voltage generation for piezoresistive pressure sensors in oil-well logging tools. IC Role / Device Role / Timing Role: Zener reference establishing stable excitation voltage for Wheatstone bridge sensors. Use Value: Low 2 µA leakage prevents loading of high-impedance sensor bridges at elevated temperatures. | Use Scenario: Calibration reference in CT scanner high-voltage supply feedback loop. IC Role / Device Role / Timing Role: Primary voltage reference for closed-loop regulation of kV-level X-ray tube supplies. Use Value: 10 Ω ZZT and ±0.002 %/°C TC maintain <0.01% regulation accuracy across thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N825UR-1 | MIL-PRF-19500/159 qualified (JAN/JANTXV); same electrical specs but enhanced screening and traceability | Required for defense/aerospace programs requiring MIL-spec documentation and lot traceability | Select 1N825UR-1 when compliance with military procurement standards is mandatory |
| CDLL825A | Identical electrical specs and DO-213AA package; commercial-grade version with standard qualification | Suitable for industrial and medical applications where MIL-spec is not required | Choose CDLL825A for cost-sensitive, high-volume production with identical performance |
Compared with 1N825A/TR, 1N825UR-1 adds MIL-qualified screening and full traceability without altering zener characteristics, while CDLL825A provides identical performance in commercial-grade form-enabling selection based on certification needs rather than functional trade-offs.
Availability
1N825A/TR is available at Aetrix Electronics and suitable for precision voltage reference, aerospace monitoring, and downhole sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N825A/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
Central Semiconductor Corp. (CDI) is a U.S.-based manufacturer specializing in discrete semiconductors, including zener, switching, and RF diodes, with emphasis on high-reliability and high-temperature solutions.
The 1N825A/TR belongs to CDI's temperature-compensated MELF zener series, engineered for precision voltage reference applications demanding ultra-low drift and hermetic reliability in extreme environments.
FAQ
What is the nominal zener voltage of the 1N825A/TR?
The 1N825A/TR has a nominal zener voltage of 6.2 V, with a guaranteed range of 5.9 V to 6.5 V at 7.5 mA test current. This tight tolerance supports precision reference design in analog circuits where voltage accuracy directly impacts system measurement fidelity. The 1N825A/TR achieves this specification using metallurgically bonded double-plug construction and rigorous process control.
Does the 1N825A/TR have a specified temperature coefficient?
Yes, the 1N825A/TR has a temperature coefficient of ±0.002 %/°C over –55°C to +100°C, per JEDEC Standard No. 5. This ultra-low drift enables stable reference performance in wide-temperature applications such as automotive engine control or industrial instrumentation. The 1N825A/TR achieves this via proprietary temperature-compensation design within its DO-213AA package.
What package type is used for the 1N825A/TR?
The 1N825A/TR uses the DO-213AA package - a hermetically sealed, leadless MELF (Metal Electrode Leadless Face) glass case also known as SOD-80 or LL34. Its axial symmetry and glass-to-metal seal provide excellent thermal stability and moisture resistance. The 1N825A/TR's cathode is marked by a visible band on the glass body.
What is the maximum power dissipation rating for the 1N825A/TR?
The 1N825A/TR is rated for 500 mW at +50°C ambient, with linear derating of 4 mW/°C above that temperature - resulting in ~200 mW capability at +125°C. This rating reflects its ability to operate reliably in thermally constrained PCB layouts. The 1N825A/TR maintains stable zener characteristics throughout this power range due to its low 10 Ω impedance and robust metallurgical construction.
How does the 1N825A/TR compare to the CDLL825A variant?
The 1N825A/TR and CDLL825A share identical electrical specifications, DO-213AA packaging, and temperature performance. The distinction lies in qualification level: CDLL825A is commercial-grade, while 1N825A/TR is a screened, traceable version intended for higher-reliability applications. Both deliver the same 6.2 V reference and ±0.002 %/°C TC, making the 1N825A/TR a drop-in alternative where enhanced quality assurance is needed.
1N825A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 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)
1N825A/TR FAQ
1.How can I place an order for 1N825A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N825A/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 1N825A/TR reliable?
The price and inventory of 1N825A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N825A/TR is usually 5 days.
3.What payment methods are accepted for 1N825A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N825A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N825A/TR?
1N825A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N825A/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 1N825A/TR?
For technical support, including 1N825A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N825A/TR requirements.
6.How does Aetrix verify that 1N825A/TR is sourced from the original manufacturer or authorized distributors?
All 1N825A/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 1N825A/TR meets industry standards.
7.What is the process for return or replacement of 1N825A/TR?
All 1N825A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N825A/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 1N825A/TR part is unused and in its original packaging.
Return procedure for 1N825A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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