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Microchip Technology 1N828/TR
- Part No.:
- 1N828/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N828/TR.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
1N828/TR from Central Semiconductor is a temperature-compensated, hermetically sealed MELF (DO-213AA) Zener diode with nominal zener voltage 6.2–6.9 V, 7.5 mA test current, 15 Ω zener impedance, 10 mV max voltage drift over −55°C to +100°C, and ±0.001 %/°C tempco - used for precision voltage reference in military-grade power supply regulation.
For engineers reviewing the 1N828/TR datasheet, 1N828/TR pinout, 1N828/TR application, or 1N828/TR equivalent, key selection criteria include its MIL-PRF-19500/159 qualified variants (e.g., 1N828UR-1), low-tempco stability at 7.5 mA, DO-213AA glass package thermal matching capability, and 500 mW power rating at +50°C.
Technical Context
This device belongs to the CDLL82x/1N82x family of double-plug, metallurgically bonded Zener diodes engineered for high-stability voltage reference across extreme temperatures. It operates with cathode-positive polarity and exhibits <10 mV total voltage variation from −55°C to +100°C per JEDEC 5.
The 1N828/TR achieves ±0.001 %/°C temperature coefficient via internal compensation design, verified at 7.5 mA test current. Its DO-213AA glass package provides hermetic sealing and axial CTE (~6 ppm/°C) optimized for matched thermal expansion on metal-core PCBs or ceramic substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Range | 6.2–6.9 V @ 7.5 mA - defines stable regulation window under nominal bias |
| Zener Impedance | 15 Ω @ 7.5 mA - ensures minimal output voltage shift under load transients | Tempco | ±0.001 %/°C - enables <10 mV total drift over −55°C to +100°C |
| Power Dissipation | 500 mW @ +50°C - supports continuous operation in high-reliability industrial/military environments |
| Package | DO-213AA (MELF, SOD-80) - hermetically sealed glass case with axial CTE ~6 ppm/°C |
| Reverse Leakage | 2 µA @ 3 V, 25°C - confirms low standby current in reference circuits |
Pinout & Package
DO-213AA (MELF) glass package: cylindrical, leadless, hermetically sealed; cathode identified by single black band; bidirectional mounting; axial coefficient of expansion ≈ +6 ppm/°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse breakdown | Connected to circuit ground or lower potential node in shunt regulator topology |
| Cathode | Current source during reverse breakdown | Banded end; connected to regulated voltage rail; polarity must be observed for stable conduction |
Key Features
| Feature | Design Value |
|---|---|
| Temperature Compensation | ±0.001 %/°C tempco enables sub-10 mV drift over −55°C to +100°C without external circuitry |
| Hermetic Glass Encapsulation | DO-213AA package prevents moisture ingress and long-term parameter drift in harsh environments |
| Metallurgical Double-Plug Construction | Enhances thermal stability and reduces noise vs. single-junction Zeners |
| MIL-PRF-19500/159 Qualification Path | Direct lineage to 1N828UR-1 variants for aerospace/defense applications requiring screening and traceability |
Applications
| Avionics Power Reference | Military Radar Bias Supply |
|---|---|
Use Scenario: Precision voltage reference in analog front-end of airborne ADC/DAC modules requiring stable excitation over −55°C to +70°C. IC Role / Device Role / Timing Role: Shunt Zener reference providing 6.5 V ±0.1 V to op-amp feedback networks and sensor excitation circuits. Use Value: ±0.001 %/°C tempco ensures <0.5 LSB error drift in 14-bit systems across full operating range. | Use Scenario: Stable bias voltage generation for GaN RF power amplifier gate drivers in ground-based radar transmitters. IC Role / Device Role / Timing Role: Low-noise, high-stability Zener reference supplying gate control voltage to driver ICs under pulsed thermal stress. Use Value: 15 Ω zener impedance and hermetic DO-213AA package maintain regulation accuracy despite rapid junction temperature swings. |
| Space-Qualified Telemetry Regulator | Nuclear Instrumentation Reference |
Use Scenario: Primary voltage reference in radiation-hardened telemetry power subsystems where long-term parametric stability is mission-critical. IC Role / Device Role / Timing Role: Shunt regulator element in redundant 3-vote reference chains with burn-in and life-test validation. Use Value: Metallurgically bonded construction and MIL-qualified variants (1N828UR-1) support 10+ year shelf-life with <0.1% Vz shift. | Use Scenario: High-reliability reference in neutron detector pulse-height analyzers operating continuously in reactor containment zones. IC Role / Device Role / Timing Role: Precision Zener setting baseline for charge-integration amplifiers measuring fission fragment energy spectra. Use Value: 2 µA leakage at 3 V and −65°C to +175°C storage rating ensure integrity after thermal cycling and gamma exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N828UR-1 | MIL-PRF-19500/159 qualified; screened to JANTXV level; same electrical specs and DO-213AA package | Required for DoD contracts; includes lot traceability, extended environmental testing, and radiation tolerance documentation | Select when compliance with MIL-STD-883 or ERH requirements is mandatory |
| CDLL828 | Commercial-grade variant; identical electrical specs and DO-213AA package; no MIL screening or traceability | Suitable for industrial prototypes or non-certified systems where cost and lead time are prioritized over qualification | Select for bench validation or volume production outside defense/aerospace supply chains |
Compared with 1N828/TR, the 1N828UR-1 adds military screening and documentation overhead but delivers assured reliability in flight-critical systems, while CDLL828 offers identical performance at lower cost for commercial-grade instrumentation where qualification isn't required.
Availability
1N828/TR is available at Aetrix Electronics and suitable for avionics power reference, military radar bias supply, and nuclear instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for 1N828/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. designs and manufactures high-reliability discrete semiconductors, specializing in Zener, TVS, and rectifier diodes for demanding industrial and defense applications.
The 1N828/TR belongs to the MIL-PRF-19500/159-aligned 1N82x series - developed specifically for precision voltage reference in aerospace, defense, and nuclear instrumentation where long-term parametric stability and hermetic reliability are non-negotiable.
FAQ
What is the zener voltage tolerance of the 1N828/TR?
The 1N828/TR has a specified zener voltage range of 6.2 V to 6.9 V at 7.5 mA test current. This 0.7 V span reflects manufacturing tolerance and is consistent across all units. The actual measured Vz for any given 1N828/TR falls within this band and is not further binned. This tolerance is verified per JEDEC standard No. 5 during production test.
Does the 1N828/TR require heatsinking in normal operation?
No, the 1N828/TR does not require external heatsinking when operated within its derated power envelope. At +50°C ambient, it supports 500 mW dissipation; above that, power must be reduced by 4 mW/°C. In typical 7.5 mA bias applications delivering ~50 mW, junction temperature rise remains well below limits even on FR-4 PCBs without copper pour.
Is the 1N828/TR compatible with reflow soldering processes?
Yes, the 1N828/TR's DO-213AA glass package is rated for standard lead-free reflow profiles (J-STD-020). Peak temperature must not exceed 260°C for ≤10 seconds. Thermal shock resistance is enhanced by its matched CTE (~6 ppm/°C), minimizing stress at the glass-metal interface during thermal cycling.
How does the 1N828/TR achieve its ±0.001 %/°C temperature coefficient?
The 1N828/TR achieves its ultra-low tempco through internal temperature-compensated Zener structure - combining a conventional Zener junction with a forward-biased reference diode in series. This dual-junction "double-plug" metallurgical construction cancels inherent voltage drift, resulting in net ±0.001 %/°C behavior at 7.5 mA, as confirmed in Figure 4 of the datasheet.
Can the 1N828/TR be used in place of the 1N829/TR?
No - the 1N828/TR and 1N829/TR are not interchangeable. While both share the DO-213AA package and 7.5 mA test current, the 1N829/TR has tighter zener voltage range (5.9–6.5 V), lower zener impedance (5 Ω), and superior tempco (±0.0005 %/°C). Substituting them risks regulation inaccuracy and thermal instability in precision circuits designed for the 1N829/TR's parameters.
1N828/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:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N828/TR FAQ
1.How can I place an order for 1N828/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N828/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 1N828/TR reliable?
The price and inventory of 1N828/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N828/TR is usually 5 days.
3.What payment methods are accepted for 1N828/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N828/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N828/TR?
1N828/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N828/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 1N828/TR?
For technical support, including 1N828/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N828/TR requirements.
6.How does Aetrix verify that 1N828/TR is sourced from the original manufacturer or authorized distributors?
All 1N828/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 1N828/TR meets industry standards.
7.What is the process for return or replacement of 1N828/TR?
All 1N828/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N828/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 1N828/TR part is unused and in its original packaging.
Return procedure for 1N828/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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