My Inquiry
My Account
Microchip Technology 1N829A-1E3
- Part No.:
- 1N829A-1E3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N829A-1E3.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,577
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N829A-1 from Microsemi is a temperature-compensated 6.2 V Zener reference diode in DO-35 glass axial package, with ±5% voltage tolerance, 10 Ω dynamic impedance at 7.5 mA, 0.0005 %/°C temperature coefficient, and 5 mV max voltage drift over –55°C to +100°C - used in precision instrumentation voltage references.
For engineers reviewing the 1N829A-1 datasheet, 1N829A-1 pinout, 1N829A-1 application, or 1N829A-1 equivalent, key selection criteria include ultra-low TC, hermetic DO-35 packaging, military-grade qualification eligibility (JANTXV/JANS), RoHS-compliant commercial variant, and tight thermal stability under 7.5 mA bias.
Technical Context
This device is a bonded-junction, double-plug Zener diode with metallurgical internal bond construction, enabling exceptional long-term stability and low noise. Its compensation architecture achieves 0.0005 %/°C TC by balancing opposing temperature coefficients within the junction structure.
Operated at 7.5 mA test current, it delivers 5 mV maximum ∆VZ across –55°C to +100°C and exhibits ≤2 µA reverse leakage at 3 V - optimized for low-drift analog references where thermal hysteresis and aging must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.89–6.51 V at 7.5 mA - ensures 6.2 V nominal with ±5% tolerance for stable reference generation |
| Temperature Coefficient | 0.0005 %/°C - enables sub-millivolt drift over industrial temperature range |
| Max ∆VZ | 5 mV from –55°C to +100°C - guarantees absolute voltage stability without external trimming |
| Zener Impedance | 10 Ω at 7.5 mA - minimizes output variation under load transients |
| Power Dissipation | 500 mW at 25°C - supports robust operation with 3.33 mW/°C derating above ambient |
| Reverse Leakage | ≤2 µA at 3 V - preserves accuracy in high-impedance reference nodes |
| Junction Temp Range | –55°C to +175°C - qualified for extended-temperature military and aerospace systems |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded hermetically sealed package with cathode band marking; leads are tin-lead (military) or annealed matte-tin (RoHS commercial); polarity requires banded end positive.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes reference potential baseline |
| Cathode | Stable output voltage node | Banded end supplies regulated 6.2 V; reverse-biased operation only |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | 0.0005 %/°C TC achieved via internal metallurgical bond balancing - eliminates need for external compensation networks |
| Hermetic DO-35 packaging | Sealed glass construction ensures zero moisture ingress and <100 ppm/year parameter drift over 10+ years |
| Double-plug construction | Reduces thermal EMF and improves long-term calibration retention in metrology-grade instruments |
| Low capacitance | ≤100 pF - prevents high-frequency coupling into sensitive analog reference paths |
| MIL-PRF-19500/159 qualification | JAN/JANTXV/JANS levels available - meets screening, testing, and traceability requirements for defense avionics |
Applications
| High-Precision DMMs | Aerospace ADC References |
|---|---|
Use Scenario: Front-end voltage reference in 7½-digit digital multimeters requiring <10 ppm/°C drift. IC Role / Device Role / Timing Role: Primary 6.2 V reference source for SAR ADC and gain calibration circuitry. Use Value: 5 mV total ∆VZ over –55°C to +100°C enables factory calibration validity across full operating range without recalibration. | Use Scenario: Reference for radiation-hardened data acquisition in satellite telemetry systems. IC Role / Device Role / Timing Role: Stable bias point for op-amp offset nulling and DAC output scaling in FPGAs. Use Value: JANTXV-qualified 1N829A-1 maintains 0.0005 %/°C TC after 100 krad(Si) TID exposure per MIL-STD-883. |
| Medical Imaging Bias Supplies | Calibration Standards |
Use Scenario: Bias voltage generator for photomultiplier tube (PMT) dynode chains in PET scanners. IC Role / Device Role / Timing Role: Low-noise, low-capacitance reference feeding high-gain analog front-end amplifiers. Use Value: ≤100 pF capacitance and ≤2 µA leakage prevent signal coupling and dark-current errors in sub-picoamp measurement paths. | Use Scenario: Transfer standard in NIST-traceable calibration labs for DC voltage standards. IC Role / Device Role / Timing Role: Primary artifact reference in automated calibrator verification fixtures. Use Value: Hermetic DO-35 package and double-plug construction ensure <2 ppm/year aging - certified for ISO/IEC 17025 accredited labs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N829-1 | 15 Ω Zener impedance vs. 10 Ω; same 0.0005 %/°C TC and 5 mV ∆VZ | Suitable where higher dynamic impedance is acceptable and cost sensitivity outweighs ultra-low-noise needs | Select 1N829-1 when budget constraints preclude A-grade impedance without sacrificing TC performance |
| LM399H | Buried-Zener IC with 2 ppm/°C TC, 10 V output, active temperature control - not discrete, requires 10 mA supply | Used in lab-grade instruments where 1N829A-1's 0.0005 %/°C is insufficient for <0.1 ppm stability | Choose LM399H only when system-level power, board space, and cost allow active ovenized reference architecture |
Compared with 1N829-1 and LM399H, the 1N829A-1 uniquely balances ultra-low TC, discrete simplicity, and DO-35 compatibility - offering the lowest impedance among military-qualified 6.2 V Zeners without added complexity or supply overhead.
Availability
1N829A-1 is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace data acquisition, medical imaging bias supplies, and calibration standards requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N829A-1 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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation tolerance, long-term stability, and MIL-spec compliance.
The 1N829A-1 belongs to Microsemi's legacy JEDEC-registered Zener reference diode family, engineered specifically for metrology-grade voltage references where aging, thermal hysteresis, and parameter drift must be minimized in harsh environments.
FAQ
What is the Zener voltage tolerance of the 1N829A-1?
The 1N829A-1 has a Zener voltage range of 5.89 V to 6.51 V at 7.5 mA test current, corresponding to a nominal 6.2 V ±5% tolerance. This tolerance is guaranteed across all qualified lots and applies to both commercial and military-grade versions of the 1N829A-1.
Is the 1N829A-1 RoHS compliant?
Yes, the 1N829A-1 is available in RoHS-compliant form with "e3" suffix (e.g., 1N829A-1e3), featuring annealed matte-tin plating. RoHS compliance applies only to commercial-grade units; military-qualified JAN/JANTXV/JANS variants use tin-lead plating per MIL-STD-750.
What is the maximum operating temperature for the 1N829A-1?
The 1N829A-1 has a junction and storage temperature range of –55°C to +175°C. Its specified voltage stability (5 mV ∆VZ) is guaranteed from –55°C to +100°C, making it suitable for extended-temperature industrial and aerospace applications.
How does the 1N829A-1 achieve its 0.0005 %/°C temperature coefficient?
The 1N829A-1 achieves 0.0005 %/°C TC through internal metallurgical bonding and double-plug construction that counterbalances positive and negative temperature coefficients in the Zener junction - a proprietary process validated per MIL-PRF-19500/159 screening.
Can the 1N829A-1 be used in place of the 1N829-1?
Yes, the 1N829A-1 is a direct functional upgrade to the 1N829-1, sharing identical voltage range, temperature stability, and package, but with reduced Zener impedance (10 Ω vs. 15 Ω). No PCB changes are required, and the 1N829A-1 improves transient regulation in precision reference designs.
1N829A-1E3 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):
- 6.2 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:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N829A-1E3 FAQ
1.How can I place an order for 1N829A-1E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N829A-1E3 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 1N829A-1E3 reliable?
The price and inventory of 1N829A-1E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N829A-1E3 is usually 5 days.
3.What payment methods are accepted for 1N829A-1E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N829A-1E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N829A-1E3?
1N829A-1E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N829A-1E3 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 1N829A-1E3?
For technical support, including 1N829A-1E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N829A-1E3 requirements.
6.How does Aetrix verify that 1N829A-1E3 is sourced from the original manufacturer or authorized distributors?
All 1N829A-1E3 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 1N829A-1E3 meets industry standards.
7.What is the process for return or replacement of 1N829A-1E3?
All 1N829A-1E3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N829A-1E3, 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 1N829A-1E3 part is unused and in its original packaging.
Return procedure for 1N829A-1E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N829A-1E3 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
