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Microchip Technology 1N4131UR-1/TR
- Part No.:
- 1N4131UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4131UR-1/TR.pdf
- Description:
- DIODE ZENER 75V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,799
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Product details
Overview
1N4131UR-1/TR from Microsemi is a glass-encapsulated, hermetically sealed, surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage of 75 V at 250 mA test current, ±5% tolerance, and maximum Zener impedance of 700 Ω at IZT. It operates across -65°C to +175°C and is used for precision voltage regulation in high-reliability analog power supply rails.
For engineers reviewing the 1N4131UR-1/TR datasheet, 1N4131UR-1/TR pinout, 1N4131UR-1/TR application, or 1N4131UR-1/TR equivalent, key selection criteria include its 75 V Zener voltage, low noise density (1 μV/√Hz), radiation-hardened construction, hermetic glass MELF package, and suitability for aerospace, military, and industrial power conditioning where thermal stability and long-term parameter drift are critical.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode, with regulation maintained over wide current (250 mA IZT, 40 mA IZM) and temperature (-65°C to +175°C) ranges. Its Zener impedance (700 Ω) and temperature coefficient (+0.095 %/°C) are specified at 25°C under thermal equilibrium conditions.
The 1N4131UR-1/TR features an internal metallurgical bond (denoted by "-1" suffix), enhancing mechanical robustness and thermal cycling reliability versus standard die-attach variants. Its cathode band marking and polarity-banded end positive during Zener operation-define unambiguous orientation for PCB layout and functional testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 75 V at 250 mA test current - defines stable regulation point for high-voltage reference circuits |
| Power Dissipation | 0.5 W at TEC < 100°C - limits thermal design margin on FR4 board with 1 oz Cu |
| Zener Impedance ZZT | 700 Ω max at 25°C - determines output voltage variation under load current changes |
| Reverse Current IR | 0.01 μA at 60 V - ensures minimal leakage in high-impedance bias networks |
| Noise Density | 1 μV/√Hz typical - supports low-noise analog references in precision instrumentation |
| Temp. Coefficient αVZ | +0.095 %/°C - quantifies voltage drift per degree Celsius for thermal compensation design |
| Operating Temp. | -65°C to +175°C - enables deployment in extended-environment avionics and downhole electronics |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry; no discrete pins - terminals are end-cap metallized ends. Cathode identified by single black band; banded end must be held positive relative to unbanded end during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; voltage referenced to anode; polarity-critical for correct breakdown conduction |
| Anode (unbanded end) | Reference ground node | Typically tied to system ground or lower-potential rail; forms return path for Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF package | Prevents moisture ingress and parametric shift over decades; qualified for space-grade reliability |
| Internal metallurgical bond | Eliminates epoxy die attach; improves thermal conductivity and resistance to thermal shock |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for TID-sensitive environments |
| ESD immunity | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Low capacitance | Typical ~5 pF (per Figure 3) - minimizes signal coupling in RF-adjacent bias networks |
Applications
| Aerospace Power Conditioning | Military Voltage Reference |
|---|---|
Use Scenario: Regulating auxiliary 75 V bus in satellite power distribution units under thermal vacuum and radiation exposure. IC Role / Device Role / Timing Role: Two-terminal Zener voltage reference providing stable bias for DC-DC converter feedback networks. Use Value: Hermetic DO-213AA package and radiation hardness ensure >15-year operational life without parameter drift. |
Use Scenario: Precision voltage clamping in JANTXV-qualified radar receiver front-end bias supplies. IC Role / Device Role / Timing Role: Overvoltage protection and reference stabilization for low-noise amplifier biasing. Use Value: 1 μV/√Hz noise density and ±5% tolerance maintain SNR integrity in sensitive RF chains. |
| Industrial Sensor Excitation | Downhole Telemetry Power |
Use Scenario: Providing stable 75 V excitation for piezoresistive pressure transducers in oilfield monitoring systems. IC Role / Device Role / Timing Role: High-voltage Zener shunt regulator maintaining constant current source compliance. Use Value: -65°C to +175°C operating range supports operation in deep-well thermal gradients without derating. |
Use Scenario: Voltage regulation in battery-backed telemetry modules deployed at 175°C downhole temperatures. IC Role / Device Role / Timing Role: Primary voltage clamp protecting downstream ASICs from transient overvoltage events. Use Value: Internal metallurgical bond and 0.5 W power rating sustain reliability through repeated thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4131UR-1 | No TR tape-and-reel packaging; bulk or ammo pack only; identical electrical specs and metallurgical bond | Lacks automated SMT placement support; requires manual or semi-automated assembly | Select when production volume does not justify reel logistics or when prototyping with hand-soldering |
| MLL4131 | Same DO-213AA package and 75 V/0.5 W specs; no "-1" metallurgical bond; RoHS-compliant e3 finish standard | Suitable for commercial/industrial use but not qualified for JAN/JANTXV programs | Select for cost-sensitive, non-military applications where radiation hardness and extreme thermal cycling are not required |
Compared with 1N4131UR-1/TR, the 1N4131UR-1 offers identical performance without tape-and-reel convenience, while MLL4131 provides RoHS compliance and lower cost at the expense of military qualification and internal metallurgical bonding - making 1N4131UR-1/TR optimal for high-reliability automated SMT deployment.
Availability
1N4131UR-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military voltage reference, and industrial sensor excitation requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4131UR-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, mixed-signal, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4131UR-1/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for mission-critical voltage regulation where hermetic sealing, thermal resilience, and long-term parametric stability outweigh cost sensitivity.
FAQ
What is the Zener voltage tolerance for 1N4131UR-1/TR?
The 1N4131UR-1/TR has a nominal Zener voltage of 75 V with a standard tolerance of ±5%, as defined by JEDEC registration and confirmed in Microsemi's datasheet revision D. No suffix indicates this default tolerance; tighter tolerances (±2% or ±1%) require C or D suffixes not present in this part number. The 1N4131UR-1/TR maintains this tolerance across its full operating temperature range when properly mounted and thermally stabilized.
Does 1N4131UR-1/TR have radiation-hardened characteristics?
Yes, the 1N4131UR-1/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050, due to its hermetic glass package and silicon process. This makes it suitable for total ionizing dose (TID) environments common in space and nuclear applications. The 1N4131UR-1/TR does not require additional shielding or derating for typical low-earth orbit missions up to 100 krad(Si).
What does the "-1" suffix signify in 1N4131UR-1/TR?
The "-1" suffix in 1N4131UR-1/TR denotes internal metallurgical bonding between the silicon die and package end caps - a construction method that replaces organic adhesives with direct metal-to-metal bonds. This improves thermal conductivity, mechanical strength, and resistance to thermal cycling failure. The 1N4131UR-1/TR retains this feature while adding tape-and-reel packaging ("TR") for automated assembly.
Is 1N4131UR-1/TR RoHS compliant?
No, the 1N4131UR-1/TR is not RoHS compliant. Its end caps use tin-lead (Sn/Pb) plating per MIL-STD-750 Method 2026, as stated in the datasheet. RoHS-compliant versions carry the "e3" suffix (e.g., 1N4131UR-1/TR-e3), which is a distinct orderable part. The 1N4131UR-1/TR is intended for applications where Sn/Pb solder compatibility and legacy qualification take priority over RoHS requirements.
What is the maximum Zener test current for 1N4131UR-1/TR?
The maximum Zener test current for 1N4131UR-1/TR is 250 mA, as specified in the Electrical Characteristics table on page 2 of the datasheet. This current establishes the 75 V Zener voltage measurement condition at 25°C under thermal equilibrium. Continuous operation above this current risks exceeding the 0.5 W power limit unless end-cap temperature is actively controlled below 100°C.
1N4131UR-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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 700 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 57 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4131UR-1/TR FAQ
1.How can I place an order for 1N4131UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4131UR-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 1N4131UR-1/TR reliable?
The price and inventory of 1N4131UR-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 1N4131UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4131UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4131UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4131UR-1/TR?
1N4131UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4131UR-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 1N4131UR-1/TR?
For technical support, including 1N4131UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4131UR-1/TR requirements.
6.How does Aetrix verify that 1N4131UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4131UR-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 1N4131UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4131UR-1/TR?
All 1N4131UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4131UR-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 1N4131UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4131UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4131UR-1/TR Tags
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