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Microchip Technology 1N3156UR-1/TR
- Part No.:
- 1N3156UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N3156UR-1/TR.pdf
- Description:
- DIODE ZENER 8.4V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N3156UR-1/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 at 10 mA test current, with 0.002 %/°C temperature coefficient and 26 mV max voltage drift over –55 °C to +100 °C, used in precision instrumentation voltage references.
For engineers reviewing the 1N3156UR-1/TR datasheet, 1N3156UR-1/TR pinout, 1N3156UR-1/TR application, or 1N3156UR-1/TR equivalent, key selection criteria include its ultra-low TC, hermetic glass construction, MIL-PRF-19500/158 JANTXV qualification capability, RoHS-compliant e3 variant availability, and tape-and-reel packaging for automated assembly.
Technical Context
This device belongs to the JEDEC-registered 1N3154–1N3157A series of zero-TC Zener reference diodes, engineered for minimal voltage variation across temperature via internal metallurgical compensation. It operates optimally at 10.0 mA, where power dissipation remains below 90 mW and zener impedance is specified at 15 Ω.
The 1N3156UR-1/TR exhibits a maximum reverse current of 10 μA at 5.5 V and achieves effective temperature stability of ±26 mV over its full operating range. Its cathode-banded polarity requires forward biasing with the banded end positive relative to the anode for proper reference operation.
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 <26 mV total drift from –55 °C to +100 °C for high-stability designs |
| Zener Impedance ZZT | 15 Ω @ 10 mA dc + 1 mA ac rms - ensures low dynamic resistance for stable regulation under load transients |
| Max Reverse Current IR | 10 μA @ 5.5 V - confirms low leakage for accurate low-current reference applications |
| Power Dissipation | 500 mW @ TL = 25 °C - supports robust thermal margin; recommended 90 mW max at 10 mA for optimal TC performance |
| Operating Temp Range | –65 °C to +175 °C - enables use in extended-environment military and aerospace systems |
Pinout & Package
Package: DO-7 (DO-204AA), hermetically sealed glass axial-leaded case with tin-lead or RoHS-compliant matte-tin plating; cathode identified by black band; weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode (banded end) | Reference output node | Provides stable 8.4 V reference potential when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener structure | Metallurgically optimized junction delivers 0.002 %/°C TC - critical for metrology-grade references |
| JANTXV qualification readiness | Base part supports MIL-PRF-19500/158 compliance with "-1" suffix and JAN/JANTX/JANTXV prefix - meets space-grade reliability requirements |
| Hermetic glass DO-7 package | Sealed construction ensures long-term parameter stability and immunity to humidity-induced drift |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special handling during board assembly |
Applications
| High-Precision ADC Reference | Aerospace Power Monitoring |
|---|---|
Use Scenario: Providing stable reference voltage for 16-bit+ analog-to-digital converters in data acquisition systems. IC Role / Device Role / Timing Role: Voltage reference source for ADC internal or external reference input. Use Value: 0.002 %/°C TC and ±26 mV drift ensure <0.01% full-scale error contribution over industrial temperature range. | Use Scenario: Monitoring bus voltage in satellite power distribution units requiring radiation-tolerant components. IC Role / Device Role / Timing Role: Primary reference for isolated DC-DC converter feedback and telemetry scaling circuits. Use Value: Hermetic DO-7 package and –65 °C to +175 °C rating support operation in vacuum and thermal cycling environments. |
| Military Instrumentation Calibration | Medical Imaging Bias Supply |
Use Scenario: Serving as traceable voltage standard in portable field calibration equipment for multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Primary reference element in self-calibrating measurement front-ends. Use Value: JEDEC registration and MIL-PRF-19500/158 qualification path enable DoD compliance documentation and audit readiness. | Use Scenario: Generating stable bias voltages for photomultiplier tube (PMT) arrays in PET/CT scanners. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for high-gain analog signal chains. Use Value: 15 Ω zener impedance and <10 μA leakage minimize noise injection and supply ripple coupling into sensitive detector interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3156AUR-1/TR | Same 8.4 V nominal, tighter 0.002 %/°C TC spec, but rated for –55 °C to +150 °C operating range vs. –55 °C to +100 °C | Better suited for high-temp avionics where extended upper limit is required | Select 1N3156AUR-1/TR if ambient exceeds +100 °C; otherwise 1N3156UR-1/TR offers identical TC and lower cost |
| LM399H | Substantially higher accuracy (±0.005% initial, 0.3 ppm/°C TC), but requires 10 V supply and heater current; TO-99 metal can | Used in laboratory-grade standards, not embedded systems due to power and size constraints | Choose LM399H only when sub-ppm stability is mandatory; 1N3156UR-1/TR provides best-in-class passive Zener performance at 1/5 the cost and footprint |
Compared with 1N3156AUR-1/TR and LM399H, the 1N3156UR-1/TR delivers optimal balance of ultra-low TC, hermetic reliability, and DO-7 manufacturability - making it the preferred choice for cost-sensitive, high-reliability embedded instrumentation where active references are impractical.
Availability
1N3156UR-1/TR is available at Aetrix Electronics and suitable for precision instrumentation, aerospace power monitoring, and military calibration equipment requiring stable component supply with traceable sourcing and long-lifecycle assurance.
Supply support for 1N3156UR-1/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 defense, aerospace, and industrial markets.
The 1N3156UR-1/TR belongs to Microsemi's legacy JEDEC-registered Zener reference diode family, designed specifically for applications demanding minimal voltage drift across extreme temperatures without active circuitry.
FAQ
What is the nominal Zener voltage and tolerance of the 1N3156UR-1/TR?
The 1N3156UR-1/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. Tighter tolerances such as ±1% or ±2% are available via custom ordering suffixes like "-1%", but the base 1N3156UR-1/TR part adheres to the standard JEDEC specification.
Does the 1N3156UR-1/TR require external current limiting, and what is its optimal operating current?
Yes, the 1N3156UR-1/TR requires a series current-limiting resistor. Its optimal operating current is 10.0 mA, where temperature coefficient is minimized and power dissipation remains under 90 mW. Operating significantly above or below this point increases voltage drift - the datasheet specifies electrical characteristics exclusively at 10 mA.
Is the 1N3156UR-1/TR qualified to military specifications, and how is that indicated in the part number?
The base 1N3156UR-1/TR is commercial-grade, but it supports full MIL-PRF-19500/158 qualification up to JANTXV level. This is achieved by adding the "-1" suffix and applying a JAN, JANTX, or JANTXV prefix (e.g., JANTX1N3156-1). The "UR" in the part number denotes tape-and-reel packaging, not military status.
What does the "TR" suffix mean in 1N3156UR-1/TR, and is it compatible with automated pick-and-place?
The "TR" suffix in 1N3156UR-1/TR indicates EIA-296 compliant tape-and-reel packaging, enabling compatibility with standard surface-mount and through-hole automated assembly equipment. Though the DO-7 package is axial-leaded, the reel format allows consistent feeding and placement using axial component feeders calibrated for 0.2 g glass diodes.
How does the temperature coefficient of the 1N3156UR-1/TR compare to standard Zener diodes, and why does it matter?
The 1N3156UR-1/TR achieves 0.002 %/°C - over 10× better than typical 5.6 V Zeners (~0.02 %/°C) and 50× better than basic 12 V Zeners (~0.1 %/°C). This ultra-low TC directly limits total voltage drift to ±26 mV across –55 °C to +100 °C, making it essential for applications where reference stability dominates system accuracy budgets.
1N3156UR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.4 V
- Tolerance:
- ±4.76%
- 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:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N3156UR-1/TR FAQ
1.How can I place an order for 1N3156UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3156UR-1/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 1N3156UR-1/TR reliable?
The price and inventory of 1N3156UR-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3156UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3156UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3156UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3156UR-1/TR?
1N3156UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3156UR-1/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 1N3156UR-1/TR?
For technical support, including 1N3156UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3156UR-1/TR requirements.
6.How does Aetrix verify that 1N3156UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3156UR-1/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 1N3156UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3156UR-1/TR?
All 1N3156UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3156UR-1/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 1N3156UR-1/TR part is unused and in its original packaging.
Return procedure for 1N3156UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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