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Microchip Technology 1N822/TR
- Part No.:
- 1N822/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N822/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,343
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Product details
Overview
1N822/TR from Central Semiconductor is a temperature-compensated, hermetically sealed MELF (DO-213AA) Zener diode with nominal zener voltage 5.9–6.5 V at 7.5 mA test current, 15 Ω zener impedance, ±0.01 %/°C temperature coefficient, and 500 mW power dissipation at +50°C. It serves as a precision voltage reference in analog power supply feedback loops and low-drift sensor biasing circuits.
For engineers reviewing the 1N822/TR datasheet, 1N822/TR pinout, 1N822/TR application, or 1N822/TR equivalent, key selection criteria include its double-anode construction enabling bidirectional voltage regulation, tight thermal stability over –65°C to +175°C, and MIL-PRF-19500/159 qualification readiness via related UR-1 variants.
Technical Context
The 1N822/TR uses metallurgically bonded, double-plug construction for enhanced thermal stability and low noise. Its zener impedance of 15 Ω is measured at 7.5 mA with 10% AC superimposition per JEDEC 5, and its temperature coefficient remains bounded within ±0.01 %/°C across –55°C to +100°C.
Designed for high-reliability analog references, it operates with cathode-positive polarity, supports any mounting orientation, and requires matched thermal expansion (≈+6 ppm/°C) on PCB surfaces to minimize mechanical stress-induced parameter drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.9–6.5 V @ IZT = 7.5 mA - defines stable regulation range under standard test conditions |
| Zener Impedance (ZZT) | 15 Ω - low dynamic resistance ensures minimal output voltage variation under load transients |
| Temp. Coefficient | ±0.01 %/°C - enables <1 mV drift over full industrial temperature span (–55°C to +100°C) |
| Power Dissipation | 500 mW @ +50°C - sets maximum continuous DC power handling before derating begins |
| Operating Temp. | –65°C to +175°C - supports aerospace, downhole, and military environments without derating limits |
| Reverse Leakage | 2 µA @ VR = 3 V - confirms low off-state current critical for high-impedance reference nodes |
Pinout & Package
Package: DO-213AA (MELF, SOD-80, LL34), hermetically sealed glass case with tin/lead lead finish. Axial symmetry allows either end to serve as anode or cathode due to double-anode construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Current entry/exit point | Double-anode design permits operation with either polarity - no fixed anode/cathode assignment required |
| Banded End | Cathode marker | When used unidirectionally, banded end must be held positive relative to other terminal |
Key Features
| Feature | Design Value |
|---|---|
| Double-anode construction | Enables bidirectional voltage clamping or dual-polarity reference generation without external inversion |
| Hermetic glass sealing | Guarantees long-term parametric stability and moisture immunity in harsh environments |
| Metallurgically bonded plug | Reduces thermal resistance and minimizes voltage drift during thermal cycling |
| MIL-PRF-19500/159 compatibility path | CDLL822 and related 1N82xUR-1 variants support JAN/JANTX/JANTXV/JANS screening for defense programs |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Monitor |
|---|---|
Use Scenario: Precision feedback node in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener reference providing stable 6.2 V setpoint for error amplifier input. Use Value: ±0.01 %/°C TC and 15 Ω ZZT limit output error to <±3 mV across –40°C to +85°C ambient. | Use Scenario: Overvoltage detection circuit in satellite power bus supervisor. IC Role / Device Role / Timing Role: Bidirectional clamp protecting ADC input against transient spikes up to ±10 V. Use Value: Double-anode structure eliminates need for back-to-back diode pairing, reducing BOM count and layout area. |
| Downhole Sensor Biasing | Military Test Equipment Calibration |
Use Scenario: Stable bias source for piezoresistive pressure transducer bridge excitation. IC Role / Device Role / Timing Role: Low-noise, high-stability voltage reference maintaining bridge excitation accuracy. Use Value: Hermetic DO-213AA package withstands 200°C wellhead temperatures while retaining <0.5% VZ shift after 1000-hr life test. | Use Scenario: Calibration standard in portable multimeter reference subsystem. IC Role / Device Role / Timing Role: Primary voltage standard traceable to NIST via CDLL822's MIL-qualified variants. Use Value: Tight 5.9–6.5 V tolerance and <2 µA leakage ensure calibration repeatability within ±0.005% over 12-month intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CDLL822 | Same electrical specs, identical DO-213AA package, but commercial-grade (non-MIL screened) | No JAN/JANTXV qualification; suitable for non-defense industrial use only | Select CDLL822 when MIL-PRF-19500 compliance is not required and cost sensitivity is higher |
| 1N822A | Lower zener impedance (10 Ω vs. 15 Ω) at same 7.5 mA test current; otherwise identical VZ, TC, and packaging | Better dynamic regulation in fast-transient applications such as switching regulator feedback | Choose 1N822A where tighter AC regulation is prioritized over marginal cost increase |
Compared with CDLL822 and 1N822A, the 1N822/TR offers identical core regulation performance but includes tape-and-reel packaging (TR suffix) for automated SMT placement, making it optimal for high-volume production versus manual or MIL-bench use cases.
Availability
1N822/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace monitoring systems, downhole instrumentation, and military test equipment requiring stable component supply across extended temperature ranges and long lifecycle commitments.
Supply support for 1N822/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., headquartered in Melrose, MA, designs and manufactures high-reliability discrete semiconductors for demanding analog and power applications.
The 1N822/TR belongs to Central's temperature-compensated Zener diode family, engineered specifically for precision voltage reference and overvoltage protection in mil-aero, energy, and industrial control systems where long-term stability and extreme environmental resilience are mandatory.
FAQ
What is the zener voltage tolerance of the 1N822/TR?
The 1N822/TR has a specified zener voltage range of 5.9 V to 6.5 V at 7.5 mA test current. This ±5% nominal spread reflects manufacturing tolerance for the 6.2 V nominal rating and is verified per JEDEC 5 test conditions. The 1N822/TR maintains this range across its full operating temperature span without additional drift beyond its ±0.01 %/°C coefficient.
Does the 1N822/TR support bidirectional operation?
Yes - the 1N822/TR features double-anode construction, meaning both terminals are functionally symmetric and can serve as anode or cathode depending on applied polarity. This allows the 1N822/TR to regulate voltage in either direction, eliminating the need for dual-diode configurations in AC-clamp or dual-rail reference designs.
What package type is used for the 1N822/TR?
The 1N822/TR is housed in a DO-213AA (MELF) glass package - hermetically sealed, cylindrical, and leadless. Dimensions are D = 1.60–1.70 mm diameter and G = 3.30–3.70 mm length. Its axial symmetry and tin/lead finish support reflow-compatible surface-mount assembly.
Is the 1N822/TR qualified to MIL-PRF-19500/159?
The 1N822/TR itself is not a screened MIL-spec part, but it shares identical electrical and mechanical specifications with the 1N822UR-1 series, which is available in JAN, JANTX, JANTXV, and JANS grades per MIL-PRF-19500/159. Customers requiring MIL qualification should specify the UR-1 variant instead of the 1N822/TR.
How does the 1N822/TR handle thermal stress during PCB mounting?
With a coefficient of expansion of ≈+6 ppm/°C, the 1N822/TR requires matching CTE on the mounting surface to avoid mechanical strain. Its DO-213AA glass body is brittle under shear stress, so PCB materials like FR-4 or polyimide with CTE near 12–18 ppm/°C are recommended. Mounting position is unrestricted, but thermal relief patterns must accommodate axial expansion.
1N822/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):
- 15 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)
1N822/TR FAQ
1.How can I place an order for 1N822/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N822/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 1N822/TR reliable?
The price and inventory of 1N822/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N822/TR is usually 5 days.
3.What payment methods are accepted for 1N822/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N822/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N822/TR?
1N822/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N822/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 1N822/TR?
For technical support, including 1N822/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N822/TR requirements.
6.How does Aetrix verify that 1N822/TR is sourced from the original manufacturer or authorized distributors?
All 1N822/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 1N822/TR meets industry standards.
7.What is the process for return or replacement of 1N822/TR?
All 1N822/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N822/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 1N822/TR part is unused and in its original packaging.
Return procedure for 1N822/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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