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Microchip Technology 1N4117UR/TR
- Part No.:
- 1N4117UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4117UR/TR.pdf
- Description:
- DIODE ZENER 25V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,933
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Product details
Overview
1N4117UR/TR from Microsemi is a glass-encapsulated surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage 25 V ±5%, 250 mA test current, 150 Ω maximum Zener impedance at IZT, and operating temperature range −65 °C to +175 °C. It provides precision voltage regulation in space-constrained, high-reliability analog power supply rails.
For engineers reviewing the 1N4117UR/TR datasheet, 1N4117UR/TR pinout, 1N4117UR/TR application, or 1N4117UR/TR equivalent, key selection criteria include its hermetically sealed MELF construction, low noise density (1 µV/√Hz), radiation-hardened design per MicroNote 050, minimal capacitance (~15 pF), and compatibility with automated SMT assembly using EIA-481-1-A tape-and-reel packaging.
Technical Context
This device operates as a two-terminal voltage reference by exploiting reverse-biased Zener breakdown in a silicon junction. Its regulation stability across wide current (1–40 mA) and temperature (−65 °C to +175 °C) ranges stems from controlled doping and metallurgical bonding options (e.g., "-1" suffix variants).
The DO-213AA package enables high thermal resistance control (150 °C/W junction-to-end-cap) and ESD insensitivity per MIL-STD-750 Method 1020. Voltage tolerance is ±5% standard; tighter ±2% (C suffix) or ±1% (D suffix) versions exist but do not apply to the base 1N4117UR/TR part number.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 25 V ±5% at 250 mA test current - defines stable regulation point for feedback loops and reference circuits |
| Power Dissipation | 0.5 W at TEC < 100 °C - limits continuous thermal load on PCB without forced cooling |
| Zener Impedance | 150 Ω max at 250 mA - determines output voltage variation under dynamic load changes |
| Reverse Leakage Current | 10 nA max at 19 V - ensures minimal quiescent current in high-impedance bias networks |
| Noise Density | 1 µV/√Hz typical at 25 °C - critical for low-noise analog references and sensor excitation |
| Operating Temperature | −65 °C to +175 °C - supports aerospace, downhole, and military environments without derating |
| Package | DO-213AA (SOD-80/MELF) glass body - hermetic seal, no moisture ingress, RoHS-compliant matte-tin end caps |
Pinout & Package
DO-213AA (SOD-80/MELF) is a cylindrical glass surface-mount package with two metallized end caps. Polarity is indicated by a single cathode band; the banded end is positive during Zener operation. No internal leads or die pads are exposed - terminals are the two end caps only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of reverse-biased junction | Connected to higher potential node; regulates voltage drop across load when reverse biased |
| Anode (unbanded end) | Cathode of reverse-biased junction | Connected to lower potential node (e.g., ground or return); completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents humidity-induced parameter drift and long-term degradation in harsh environments |
| Radiation hardness | Inherently resistant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space-grade applications |
| Low noise density | 1 µV/√Hz enables use in precision analog front-ends without added filtering |
| ESD insensitivity | Passes MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Tape-and-reel packaging | EIA-481-1-A compliant (12 mm tape, 2000/reel) - ensures reliable pick-and-place placement accuracy |
Applications
| Reference Voltage Generation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Providing stable 25 V reference for ADC voltage reference buffers and op-amp biasing in industrial data acquisition systems. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise DC potential independent of supply variation. Use Value: Maintains ±0.25 V regulation over 1–40 mA load current and −40 °C to +85 °C ambient, reducing calibration drift. | Use Scenario: Clamping transient surges on 24 V DC power rails in railway signaling control modules. IC Role / Device Role / Timing Role: Shunt regulator diverting excess energy to ground when rail exceeds 25 V threshold. Use Value: Limits peak voltage to ≤25.5 V with <10 ns response, protecting downstream 24 V logic and interface ICs. |
| Temperature-Stable Bias Network | High-Temperature Sensor Excitation |
Use Scenario: Generating bias current for platinum RTD bridges in oil & gas downhole telemetry tools. IC Role / Device Role / Timing Role: Constant-current source built around 1N4117UR/TR and series resistor, leveraging stable VZ vs. temperature. Use Value: Delivers <±0.5% current variation from −55 °C to +175 °C due to matched αVZ = +0.080 %/°C and low thermal resistance. | Use Scenario: Supplying excitation voltage to piezoresistive pressure sensors in jet engine monitoring systems. IC Role / Device Role / Timing Role: Low-noise, stable DC source replacing noisy switching regulators in analog signal chains. Use Value: Reduces sensor output noise floor by 12 dB versus LDO-based excitation, improving pressure resolution by 0.1% FS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4712A | Same 25 V nominal rating, but DO-41 axial package (not surface-mount); 1 W power rating; ±5% tolerance; higher ZZT (25 Ω typical) | Requires through-hole assembly; unsuitable for high-density SMT layouts or reflow-only processes | Select only if board-level repair, legacy design reuse, or higher power margin (>0.5 W) is required |
| BZX84-C24 | SOT-23 package; 24 V nominal; ±5% tolerance; 250 mW rating; 60 Ω ZZT; 100 nA IR @ 19.4 V | Lower power and voltage rating; smaller footprint but less thermal mass and higher tempco (+0.085 %/°C) | Choose for cost-sensitive consumer designs where 24 V suffices and 0.5 W derating is acceptable |
Compared with 1N4117UR/TR, 1N4712A offers higher power but lacks hermetic sealing and SMT compatibility, while BZX84-C24 sacrifices reliability and thermal robustness for footprint reduction and cost - neither matches the 1N4117UR/TR's combination of MELF ruggedness, radiation hardness, and 175 °C operation.
Availability
1N4117UR/TR is available at Aetrix Electronics and suitable for high-reliability power supply regulation, overvoltage clamping, and precision reference generation requiring stable component supply across aerospace, defense, and industrial embedded programs.
Supply support for 1N4117UR/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, radiation-hardened, and high-temperature analog and mixed-signal components.
The 1N4117UR/TR belongs to Microsemi's legacy DO-213AA glass Zener family, engineered for mission-critical voltage regulation where hermeticity, wide temperature operation, and low-noise performance outweigh cost or size constraints.
FAQ
What is the Zener voltage tolerance for 1N4117UR/TR?
The 1N4117UR/TR has a nominal Zener voltage of 25 V with a standard tolerance of ±5%, as specified in the Microsemi datasheet revision D. No tighter tolerance (e.g., ±2% or ±1%) is assigned to this specific part number - those require C or D suffixes not present in 1N4117UR/TR.
Is 1N4117UR/TR RoHS compliant?
Yes, the "e3" suffix in the full designation confirms RoHS compliance. The 1N4117UR/TR uses annealed matte-tin plating on end caps per MIL-STD-750 Method 2026 and meets lead-free soldering requirements up to 260 °C for 10 seconds.
What is the maximum Zener test current for 1N4117UR/TR?
The maximum Zener test current for 1N4117UR/TR is 250 mA, as defined in the Electrical Characteristics table on page 2 of the Microsemi datasheet. This current establishes the 25 V nominal Zener voltage measurement condition at 25 °C.
Does 1N4117UR/TR have a documented radiation hardness specification?
Yes, the 1N4117UR/TR is inherently radiation hard per Microsemi MicroNote 050. Its glass-encapsulated DO-213AA structure and silicon process provide proven resistance to total ionizing dose (TID), making it suitable for low-earth orbit and nuclear instrumentation applications.
Can 1N4117UR/TR be used in reflow soldering processes?
Yes, the 1N4117UR/TR supports standard lead-free reflow profiles: maximum solder temperature is 260 °C for 10 seconds, per the Mechanical and Packaging section. Its glass body and tin-plated end caps ensure reliable wetting and joint integrity under IPC-J-STD-020 conditions.
1N4117UR/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):
- 25 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 1900 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N4117UR/TR FAQ
1.How can I place an order for 1N4117UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4117UR/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 1N4117UR/TR reliable?
The price and inventory of 1N4117UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4117UR/TR is usually 5 days.
3.What payment methods are accepted for 1N4117UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4117UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4117UR/TR?
1N4117UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4117UR/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 1N4117UR/TR?
For technical support, including 1N4117UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4117UR/TR requirements.
6.How does Aetrix verify that 1N4117UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N4117UR/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 1N4117UR/TR meets industry standards.
7.What is the process for return or replacement of 1N4117UR/TR?
All 1N4117UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4117UR/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 1N4117UR/TR part is unused and in its original packaging.
Return procedure for 1N4117UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4117UR/TR Tags
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