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Microchip Technology 1N4371A-1
- Part No.:
- 1N4371A-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4371A-1.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
1N4371A-1 from Microsemi is a 500 mW, 2.7 V ±5% Zener diode in DO-35 glass axial package, qualified to JANTXV level per MIL-PRF-19500/127, with 30 Ω dynamic impedance at 20 mA, -0.080 %/°C temperature coefficient, and rated for -65°C to +175°C operation. It provides precision voltage regulation in space-constrained, high-reliability analog power rails.
For engineers reviewing the 1N4371A-1 datasheet, 1N4371A-1 pinout, 1N4371A-1 application, or 1N4371A-1 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W junction-to-lead), reverse leakage (60 µA @ 1.0 V), surge current capability, and military qualification level - all critical for aerospace power conditioning and reference design.
Technical Context
The 1N4371A-1 operates as a two-terminal shunt voltage regulator, conducting in reverse breakdown at its nominal 2.7 V Zener voltage when biased above IZK (knee current). Its metallurgically bonded junction ensures stable regulation across wide temperature extremes (-65°C to +175°C) and radiation environments.
It exhibits a negative temperature coefficient of -0.080 %/°C at 25°C, indicating decreasing Zener voltage with rising temperature - a key factor in temperature-compensated reference designs. The DO-35 package enables axial through-hole mounting with solderable tin-lead or RoHS-compliant matte-tin plating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.7 V ±5% at IZT = 20 mA - defines primary regulation setpoint for low-voltage reference circuits |
| Zener Impedance ZZT | 30 Ω at 20 mA - determines output voltage stability under load variation |
| Reverse Leakage IR | 60 µA max @ VR = 1.0 V - limits standby power loss in always-on bias networks |
| Max Power Dissipation | 500 mW @ TL = 50°C - sets thermal derating baseline for PCB layout and heatsinking |
| Temp Coefficient αVZ | -0.080 %/°C @ 25°C - enables predictable drift modeling in temperature-critical references |
| Junction-to-Lead RθJL | 250 °C/W - informs thermal path design when leads serve as heat sinks |
| Operating Temp Range | -65°C to +175°C - supports deployment in extended-environment avionics and downhole electronics |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated and solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / reverse-bias input | Banded end; must be held at higher voltage than anode to enter breakdown and regulate at 2.7 V |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 JANTXV qualification | Validated reliability for mission-critical aerospace and defense systems requiring full screening and lot traceability |
| Metallurgical bond construction | Eliminates wire-bond failure modes and improves long-term parameter stability under thermal cycling |
| Hermetic DO-35 glass package | Provides moisture and contaminant immunity essential for high-humidity or sealed enclosure applications |
| Low capacitance & ESD robustness | Minimizes signal coupling in RF-adjacent bias networks and withstands MIL-STD-750 method 1020 ESD testing |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID), per Microsemi MicroNote 050 - suitable for low-earth orbit electronics |
Applications
| Avionics Power Reference | Satellite Sensor Biasing |
|---|---|
Use Scenario: Providing stable 2.7 V reference for ADC front-end amplifiers in flight control computers operating across -55°C to +125°C ambient. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise bias point for op-amp input stages and voltage references. Use Value: Maintains regulation accuracy within ±5% despite extreme thermal cycling and radiation exposure, ensuring consistent sensor data integrity. | Use Scenario: Biasing photodiode preamplifiers in Earth observation payloads where power efficiency and radiation tolerance are mandatory. IC Role / Device Role / Timing Role: Low-noise, low-capacitance Zener source supplying regulated voltage to transimpedance amplifier feedback networks. Use Value: Delivers <60 µA leakage at 1.0 V reverse bias and inherent TID hardness, preserving SNR in low-light imaging chains. |
| Downhole Telemetry Supply | Military Radio Voltage Clamp |
Use Scenario: Regulating auxiliary supply rails in oil/gas logging tools exposed to 175°C wellbore temperatures and mechanical shock. IC Role / Device Role / Timing Role: High-temperature-stable shunt regulator protecting downstream LDOs and microcontrollers from overvoltage transients. Use Value: Sustains functional regulation up to +175°C junction temperature with 250 °C/W RθJL, enabling direct lead-mount thermal management. | Use Scenario: Clamping RF receiver front-end supply lines against ESD and lightning-induced surges in handheld tactical radios. IC Role / Device Role / Timing Role: Fast-response transient suppressor limiting rail voltage to 2.7 V during sub-100 ns events. Use Value: Achieves non-sensitive ESD performance per MIL-STD-750 method 1020 and handles repetitive surge without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4371AUR-1 | Same electrical specs but RoHS-compliant matte-tin plating; commercial-grade only (no JANTXV qualification) | Lacks MIL-PRF-19500 screening; unsuitable for flight hardware or Class H reliability programs | Select when RoHS compliance is mandatory and military qualification is not required |
| 1N5223B | 2.7 V ±5%, 500 mW, DO-35, but only commercial grade; no MIL qualification; ZZT = 35 Ω (vs. 30 Ω) | Not radiation-hardened; higher leakage (100 µA @ 1.0 V); limited to industrial/commercial use | Select for cost-sensitive terrestrial applications where extended temp range and radiation tolerance are unnecessary |
Compared with 1N4371A-1, the 1N4371AUR-1 offers identical regulation performance with RoHS compliance but forfeits JANTXV screening, while the 1N5223B provides basic 2.7 V regulation at lower cost but lacks military qualification, radiation hardness, and tight thermal specifications needed for harsh environments.
Availability
1N4371A-1 is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, and downhole telemetry requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4371A-1 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N4371A-1 belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, engineered for voltage regulation in mission-critical systems where parameter stability under extreme temperature, radiation, and mechanical stress is non-negotiable.
FAQ
What is the Zener voltage tolerance of the 1N4371A-1?
The 1N4371A-1 has a nominal Zener voltage of 2.7 V with a ±5% tolerance, as indicated by the "A" suffix in its nomenclature per JEDEC standards. This tolerance applies at the specified test current IZT = 20 mA and 25°C ambient. Tighter tolerances (±2%, ±1%) are available in other variants but not in the 1N4371A-1.
Is the 1N4371A-1 suitable for high-temperature applications?
Yes, the 1N4371A-1 is rated for continuous operation from -65°C to +175°C junction temperature and is qualified to JANTXV level per MIL-PRF-19500/127. Its DO-35 package and metallurgical bond enable reliable regulation in downhole, avionics, and engine-control environments where thermal extremes are routine.
Does the 1N4371A-1 have radiation hardness certification?
Yes, the 1N4371A-1 is inherently radiation-hardened as documented in Microsemi MicroNote 050. While not individually tested per MIL-STD-883, its construction and qualification history support use in low-earth orbit and nuclear instrumentation applications where total ionizing dose (TID) resilience is required.
What is the maximum reverse leakage current for the 1N4371A-1?
The 1N4371A-1 specifies a maximum reverse leakage current (IR) of 60 µA at VR = 1.0 V and 25°C. This low leakage supports energy-efficient bias networks in battery-powered or always-on systems, especially when combined with its -0.080 %/°C temperature coefficient for predictable drift behavior.
Can the 1N4371A-1 be used as a direct replacement for the 1N4371AUR-1?
No - the 1N4371A-1 and 1N4371AUR-1 are not direct replacements. The 1N4371A-1 is JANTXV-qualified and non-RoHS (tin-lead plating), while the 1N4371AUR-1 is RoHS-compliant but commercial-grade only. Substituting one for the other compromises either reliability screening or environmental compliance, depending on program requirements.
1N4371A-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4371A-1 FAQ
1.How can I place an order for 1N4371A-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4371A-1 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 1N4371A-1 reliable?
The price and inventory of 1N4371A-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4371A-1 is usually 5 days.
3.What payment methods are accepted for 1N4371A-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4371A-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4371A-1?
1N4371A-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4371A-1 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 1N4371A-1?
For technical support, including 1N4371A-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4371A-1 requirements.
6.How does Aetrix verify that 1N4371A-1 is sourced from the original manufacturer or authorized distributors?
All 1N4371A-1 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 1N4371A-1 meets industry standards.
7.What is the process for return or replacement of 1N4371A-1?
All 1N4371A-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4371A-1, 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 1N4371A-1 part is unused and in its original packaging.
Return procedure for 1N4371A-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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