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Microchip Technology 1N3155UR-1/TR
- Part No.:
- 1N3155UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N3155UR-1/TR.pdf
- Description:
- DIODE ZENER 8.4V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N3155UR-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, 0.005 %/°C temperature coefficient, and 65 mV max voltage drift over –55°C to +100°C. It operates at 10 mA test current with 15 Ω dynamic impedance and is qualified to MIL-PRF-19500/158 JANTXV level for high-reliability instrumentation.
For engineers reviewing the 1N3155UR-1/TR datasheet, 1N3155UR-1/TR pinout, 1N3155UR-1/TR application, or 1N3155UR-1/TR equivalent, key selection criteria include its ultra-low TC, hermetic glass packaging, military-grade qualification, RoHS-compliant tape-and-reel delivery, and stable 8.4 V reference under varying thermal and current conditions.
Technical Context
This device belongs to Microsemi's JEDEC-registered 1N3154–1N3157A series of zero-TC Zener references, engineered to minimize voltage drift via metallurgical compensation across the junction. Its 0.005 %/°C TC and 65 mV total ΔVZ over –55°C to +100°C are achieved at IZT = 10 mA with 15 Ω ZZT.
The DO-7 package supports axial mounting with tin-lead or matte-tin plating per MIL-STD-750, and polarity is defined by cathode band marking. It is ESD-insensitive per MIL-STD-750 Method 1020 and rated for operation up to +175°C storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 8.00–8.80 V @ 10 mA - defines nominal 8.4 V reference with ±5% initial tolerance |
| Temp Coefficient αVZ | 0.005 %/°C - enables <0.05% output shift over full operating range |
| Max ΔVZT | 65 mV over –55°C to +100°C - guarantees tight regulation without external compensation |
| Zener Impedance ZZT | 15 Ω @ 10 mA - ensures low sensitivity to load current variations |
| Power Dissipation | 500 mW @ TL = 25°C - supports robust thermal margin in sealed enclosures |
| Reverse Current IR | ≤10 μA @ 5.5 V - confirms low leakage for precision biasing |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass axial-leaded package with cathode band marking. Polarity: banded end is anode (positive), opposite end is cathode (negative) when used as forward-biased reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (banded end) | Reference output node | Connected to regulated positive rail; requires current-limiting resistor to IZ = 10 mA |
| Cathode (unbanded end) | Ground reference return | Connected to system ground or common reference point; establishes reverse-bias condition |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | Metallurgically optimized junction delivers 0.005 %/°C TC - eliminates need for external thermistors or trimming |
| Military qualification | JANTXV-level compliance per MIL-PRF-19500/158 - validated for aerospace and defense mission-critical systems |
| Hermetic glass package | DO-7 construction with leak-tested seal - ensures long-term stability and moisture immunity |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - withstands handling without protection circuitry |
Applications
| High-Precision ADC Reference | Aerospace Sensor Biasing |
|---|---|
Use Scenario: Provides stable excitation voltage for 16-bit+ analog-to-digital converters in data acquisition systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC internal reference or external VREF input. Use Value: 65 mV max ΔVZT over –55°C to +100°C ensures <±0.04 LSB error contribution across temperature. | Use Scenario: Supplies bias voltage to piezoresistive pressure transducers in flight control units. IC Role / Device Role / Timing Role: Temperature-stable excitation source for bridge-based sensors exposed to wide ambient swings. Use Value: 0.005 %/°C TC maintains sensor gain accuracy within ±0.05% over full aircraft operational envelope. |
| Test Equipment Calibration | Industrial PLC Analog Input Modules |
Use Scenario: Serves as primary reference in portable multimeters and automated calibration standards. IC Role / Device Role / Timing Role: Primary DC voltage standard traceable to NIST via factory calibration. Use Value: Hermetic DO-7 package prevents parameter drift due to humidity or oxidation over 10+ year service life. | Use Scenario: Stabilizes scaling reference for 4–20 mA loop-powered analog input circuits. IC Role / Device Role / Timing Role: Fixed 8.4 V reference for current-to-voltage conversion and gain-setting resistors. Use Value: 15 Ω ZZT minimizes output variation when supply rails fluctuate ±5% in industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3155A-1/TR | Same 8.4 V nominal, tighter 0.005 %/°C TC, extended temp range to +150°C | Preferred for extended-temperature industrial controllers where ambient exceeds +100°C | Select when higher upper-temperature limit is required without changing layout or bias network |
| 1N3156UR-1/TR | Same package and qualification, lower 0.002 %/°C TC, 26 mV max ΔVZT | Suitable for metrology-grade instruments requiring sub-30 mV total drift | Choose when absolute voltage stability dominates cost and availability constraints |
Compared with 1N3155UR-1/TR, the 1N3155A-1/TR extends usable temperature range while maintaining identical pinout and drive requirements, whereas the 1N3156UR-1/TR reduces voltage drift by >50% at the expense of slightly higher unit cost and longer lead times.
Availability
1N3155UR-1/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace sensor conditioning, and industrial calibration equipment requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N3155UR-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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N3155UR-1/TR belongs to Microsemi's legacy 1N315x family of temperature-compensated Zener references, developed specifically for applications demanding long-term voltage stability under extreme thermal and radiation environments.
FAQ
What is the nominal Zener voltage and tolerance of the 1N3155UR-1/TR?
The 1N3155UR-1/TR has a nominal Zener voltage of 8.4 V with a tolerance of ±5%, specified as 8.00–8.80 V at 10 mA test current. This tolerance is inherent to the base part number; tighter tolerances (e.g., ±1%) require suffixes like "-1%" added to the ordering code. The 1N3155UR-1/TR itself does not include such a suffix and therefore adheres to the standard ±5% band.
Is the 1N3155UR-1/TR qualified to military standards?
Yes, the 1N3155UR-1/TR carries JANTXV qualification per MIL-PRF-19500/158, confirmed by the "-1" suffix and UR designation indicating hermetic DO-7 packaging with military screening. It meets requirements for temperature cycling, mechanical shock, and long-term reliability in defense and space applications. The 1N3155UR-1/TR is fully traceable to Microsemi's Scottsdale Division manufacturing and test records.
What is the maximum operating temperature range for the 1N3155UR-1/TR?
The 1N3155UR-1/TR is rated for operation from –55°C to +100°C, with storage capability up to +175°C. Its voltage drift specification of 65 mV maximum applies across the full –55°C to +100°C range. This range is defined in the official Microsemi datasheet and verified per MIL-PRF-19500/158 testing protocols for the 1N3155UR-1/TR variant.
Does the 1N3155UR-1/TR require external current limiting?
Yes, the 1N3155UR-1/TR must be operated with a series current-limiting resistor to maintain IZ = 10 mA for optimal temperature coefficient and impedance performance. At this current, power dissipation remains below 90 mW, well within its 500 mW rating. Operating outside 10 mA degrades TC and increases ΔVZ; the 1N3155UR-1/TR datasheet specifies all key parameters at this exact test condition.
What does the "TR" suffix indicate in 1N3155UR-1/TR?
The "TR" suffix in 1N3155UR-1/TR denotes tape-and-reel packaging per EIA-296 standard, enabling automated surface-mount or axial insertion assembly. It does not alter electrical characteristics or qualification level. The 1N3155UR-1/TR retains full JANTXV qualification and DO-7 mechanical form factor, with reel quantities typically supplied in 2,000-unit reels unless otherwise specified.
1N3155UR-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
1N3155UR-1/TR FAQ
1.How can I place an order for 1N3155UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3155UR-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 1N3155UR-1/TR reliable?
The price and inventory of 1N3155UR-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 1N3155UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3155UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3155UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3155UR-1/TR?
1N3155UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3155UR-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 1N3155UR-1/TR?
For technical support, including 1N3155UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3155UR-1/TR requirements.
6.How does Aetrix verify that 1N3155UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3155UR-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 1N3155UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3155UR-1/TR?
All 1N3155UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3155UR-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 1N3155UR-1/TR part is unused and in its original packaging.
Return procedure for 1N3155UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3155UR-1/TR Tags
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