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Microchip Technology 1N3156A/TR
- Part No.:
- 1N3156A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N3156A/TR.pdf
- Description:
- DIODE ZENER 8.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:7,963
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Product details
Overview
1N3156A/TR from Microsemi is a temperature-compensated 8.4 V Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for ±5% voltage tolerance, 0.002 %/°C temperature coefficient, and 26 mV max voltage drift over –55°C to +100°C. It operates at 10 mA test current with 15 Ω dynamic impedance and is used in precision analog instrumentation requiring stable voltage references.
For engineers reviewing the 1N3156A/TR datasheet, 1N3156A/TR pinout, 1N3156A/TR application, or 1N3156A/TR equivalent, key selection criteria include its ultra-low TC, hermetic glass packaging, military-grade qualification path (JANTXV), RoHS-compliant e3 variant option, and tape-and-reel availability via TR suffix.
Technical Context
This device belongs to Microsemi's JEDEC-registered 1N3154–1N3157A series of zero-TC Zener references. Its 8.4 V nominal zener voltage is stabilized by internal metallurgical compensation, achieving 0.002 %/°C effective TC and only 26 mV total voltage variation across –55°C to +100°C.
It is specified for 10 mA zener test current (IZT), delivering 15 Ω dynamic impedance (ZZT) and <10 μA reverse leakage at 5.5 V. The DO-7 package supports axial mounting, hermetic sealing, and operation up to +175°C storage temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.00–8.80 V @ IZT = 10 mA - defines nominal 8.4 V reference with ±5% initial tolerance |
| Temp. Coefficient (αVZ) | 0.002 %/°C - enables minimal drift in high-stability analog circuits over wide temperature ranges |
| Voltage Drift (ΔVZT) | 26 mV max over –55°C to +100°C - quantifies total deviation from nominal VZ across full operating range |
| Zener Impedance (ZZT) | 15 Ω @ 1 mA ac superimposed on 10 mA dc - ensures tight regulation under small-signal load variations |
| Max Reverse Current (IR) | 10 μA @ 5.5 V - confirms low leakage below breakdown, critical for low-power reference accuracy |
| Power Dissipation | 500 mW @ TL = 25°C - supports robust thermal margin; recommended 90 mW max at 10 mA for optimal TC stability |
| Operating Temp Range | –55°C to +100°C - validated performance envelope for industrial and aerospace environments |
Pinout & Package
Package: DO-7 (DO-204AA), hermetically sealed glass axial-leaded case with cathode band marking. Tin-lead or RoHS-compliant matte-tin plating per MIL-STD-750.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Reference output node | Banded end; supplies stable 8.4 V reference when reverse-biased at 10 mA |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | Metallurgically engineered junction delivers 0.002 %/°C TC - eliminates need for external compensation networks |
| Hermetic glass construction | DO-7 package provides moisture and contamination immunity - ensures long-term parameter stability in harsh environments |
| Military qualification path | Supports JANTXV upgrade (e.g., JANTXV1N3156A-1) per MIL-PRF-19500/158 - meets screening and reliability requirements for defense systems |
| ESD robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - simplifies handling and assembly without special precautions |
| Tape-and-reel packaging | TR suffix denotes EIA-296 compliant reel format - enables automated SMT-compatible axial insertion |
Applications
| High-Precision Data Acquisition Systems | Aerospace Avionics Power Monitoring |
|---|---|
Use Scenario: Reference voltage source for 16-bit ADCs and DACs in environmental sensor arrays. IC Role / Device Role / Timing Role: Provides stable 8.4 V reference to analog front-end comparators and voltage dividers. Use Value: 26 mV max drift over –55°C to +100°C ensures <0.3% full-scale error contribution in calibrated measurement chains. | Use Scenario: Voltage reference in DC bus monitoring circuits for flight control power supplies. IC Role / Device Role / Timing Role: Supplies regulated bias to isolated error amplifiers in redundant power supervisors. Use Value: 0.002 %/°C TC prevents thermal-induced offset errors during cabin temperature cycling (–55°C to +70°C). |
| Industrial Programmable Logic Controller (PLC) Analog I/O Modules | Radiation-Tolerant Instrumentation (via RH prefix) |
Use Scenario: Calibration reference for 4–20 mA transmitter output stages in factory automation systems. IC Role / Device Role / Timing Role: Anchors loop-current setpoint accuracy against ambient temperature shifts. Use Value: Tight 15 Ω ZZT minimizes current-source loading effects, maintaining <0.1% linearity over 10–20 mA output range. | Use Scenario: Onboard reference in satellite telemetry conditioning circuits exposed to TID >100 krad(Si). IC Role / Device Role / Timing Role: Stable voltage anchor for radiation-hardened op-amps and ADC drivers. Use Value: RH3156 variant (radiation-hardened version) retains 0.002 %/°C TC after 100 krad(Si), enabling mission-critical calibration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3156 | Same electrical specs but rated for –55°C to +100°C (vs. +150°C for 1N3156A); no A-grade extended temp validation | Limited to commercial/industrial use where upper temp limit ≤100°C | Select 1N3156/TR if cost-sensitive and operating ambient stays below 100°C |
| 1N3157A | Lower 0.001 %/°C TC and 13 mV ΔVZT - tighter thermal stability than 1N3156A's 0.002 %/°C and 26 mV | Suitable for ultra-high-precision metrology where sub-10 mV drift is required | Choose 1N3157A/TR when system-level TC budget demands <0.0015 %/°C contribution |
Compared with 1N3156 and 1N3157A, the 1N3156A/TR offers the optimal balance of extended temperature range (–55°C to +100°C), ultra-low TC (0.002 %/°C), and proven reliability in DO-7 packaging - making it preferred for aerospace and industrial control where both thermal margin and stability are constrained.
Availability
1N3156A/TR is available at Aetrix Electronics and suitable for high-reliability analog instrumentation, avionics power monitoring, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N3156A/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 1N3156A/TR belongs to Microsemi's legacy 1N3154–1N3157A Zener reference diode family, designed specifically for applications demanding ultra-stable voltage references under extreme thermal and environmental stress.
FAQ
What is the nominal zener voltage and tolerance of the 1N3156A/TR?
The 1N3156A/TR has a nominal zener voltage of 8.4 V with a guaranteed range of 8.00–8.80 V at 10 mA test current, corresponding to ±5% initial tolerance. This specification is defined per JEDEC registration and verified across the –55°C to +100°C operating range. Tighter tolerances (e.g., ±1%, ±2%) are available via custom ordering suffixes like 1N3156A-1%.
Does the 1N3156A/TR support military-grade qualification?
Yes - the base 1N3156A/TR can be upgraded to JANTXV qualification per MIL-PRF-19500/158 by ordering as JANTXV1N3156A-1. This includes enhanced screening, lot traceability, and extended reliability testing. The TR suffix remains valid for tape-and-reel delivery in qualified versions.
What is the maximum operating temperature range for the 1N3156A/TR?
The 1N3156A/TR is rated for operation from –55°C to +100°C, with storage temperature extending to +175°C. This extended lower limit and controlled upper limit distinguish it from the standard 1N3156 (–55°C to +100°C only) and enable use in automotive engine compartments and avionics bays where thermal cycling is severe.
How does the temperature coefficient of the 1N3156A/TR compare to other devices in the series?
The 1N3156A/TR features a 0.002 %/°C effective temperature coefficient, placing it between the 1N3155A (0.005 %/°C) and 1N3157A (0.001 %/°C). This value is measured across the full –55°C to +100°C range and reflects metallurgical compensation optimized for 8.4 V reference stability.
Is the 1N3156A/TR RoHS compliant?
The 1N3156A/TR is not inherently RoHS compliant; however, Microsemi offers an RoHS-compliant version with "e3" suffix (e.g., 1N3156Ae3/TR) using annealed matte-tin plating. Military variants (JAN/JANTX/JANTXV) exclude RoHS compliance per specification, so e3 and military prefixes are mutually exclusive.
1N3156A/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):
- 8.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N3156A/TR FAQ
1.How can I place an order for 1N3156A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3156A/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 1N3156A/TR reliable?
The price and inventory of 1N3156A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3156A/TR is usually 5 days.
3.What payment methods are accepted for 1N3156A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3156A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3156A/TR?
1N3156A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3156A/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 1N3156A/TR?
For technical support, including 1N3156A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3156A/TR requirements.
6.How does Aetrix verify that 1N3156A/TR is sourced from the original manufacturer or authorized distributors?
All 1N3156A/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 1N3156A/TR meets industry standards.
7.What is the process for return or replacement of 1N3156A/TR?
All 1N3156A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3156A/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 1N3156A/TR part is unused and in its original packaging.
Return procedure for 1N3156A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3156A/TR Tags
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