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Microchip Technology 1N4371E3
- Part No.:
- 1N4371E3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4371E3.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,565
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Product details
Overview
1N4371E3 from Microsemi is a 500 mW, 2.7 V ±5% Zener diode in DO-35 (DO-204AH) glass axial-leaded package, qualified to JANTXV level per MIL-PRF-19500/127, with 30 Ω dynamic impedance at 20 mA and -0.080 %/°C temperature coefficient - used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N4371E3 datasheet, 1N4371E3 pinout, 1N4371E3 application, or 1N4371E3 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W junction-to-lead), RoHS compliance status, reverse leakage (60 µA at 1.0 V), and radiation-hardened operation per MicroNote 050.
Technical Context
This device operates as a two-terminal voltage reference in reverse breakdown mode, with regulation stable across -65 °C to +175 °C ambient and junction temperatures. Its metallurgically bonded construction ensures mechanical robustness and low parameter drift under thermal cycling.
The 1N4371E3 exhibits a negative temperature coefficient (-0.080 %/°C), making it suitable for temperature-compensated references when paired with positive-TC components. It delivers 2.7 V regulation at IZT = 20 mA with ZZT = 30 Ω and IR = 60 µA at VR = 1.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.7 V at 20 mA test current - defines nominal regulation point for stable biasing of analog circuitry |
| Zener Tolerance | ±5% - supports cost-sensitive designs where tight regulation isn't required |
| Dynamic Impedance ZZT | 30 Ω at 20 mA - determines output voltage variation under load current changes |
| Max Power Dissipation | 500 mW at TL = 50 °C - sets thermal design limits for lead-mounted PCB layouts |
| Temp Coefficient αVZ | -0.080 %/°C - enables predictable drift compensation in wide-temperature environments |
| Reverse Leakage IR | 60 µA at VR = 1.0 V - impacts quiescent current in low-power standby circuits |
| Junction-to-Lead RθJL | 250 °C/W - governs thermal rise under sustained DC loading with 9.53 mm lead length |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored 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 | Non-banded end | Connected to lower-potential node; carries forward current during conduction |
| Cathode | Banded end | Connected to higher-potential node; regulates voltage when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 qualification | JANTXV-level reliability certified for aerospace and defense systems requiring extended lifetime and radiation hardness |
| Metallurgical bond construction | Eliminates wire-bond fatigue failure modes, enabling stable long-term Zener voltage performance |
| Low capacitance | Minimizes high-frequency coupling in RF bias networks and signal conditioning paths |
| ESD immunity | Non-sensitive per MIL-STD-750 method 1020 - simplifies handling without ESD protection circuitry |
| Radiation hardness | Inherently resistant to total ionizing dose (TID) per Microsemi MicroNote 050 - validated for space-qualified applications |
Applications
| Avionics Power Regulation | Military Radio Biasing |
|---|---|
Use Scenario: Regulating reference voltage in airborne DC-DC converter feedback loops operating from -55 °C to +125 °C. IC Role / Device Role / Timing Role: Zener diode providing stable 2.7 V reference for error amplifier input. Use Value: Maintains <±1.5% output accuracy over temperature due to known αVZ and low ZZT. | Use Scenario: Establishing bias points for RF power amplifier stages in handheld tactical radios. IC Role / Device Role / Timing Role: Two-terminal shunt regulator supplying fixed bias to transistor bases. Use Value: Delivers consistent bias under pulsed RF loads thanks to metallurgical bond stability and low capacitance. |
| Spacecraft Sensor Conditioning | Industrial Process Controller Reference |
Use Scenario: Generating precision reference for ADC front-end in satellite telemetry sensor modules. IC Role / Device Role / Timing Role: Voltage reference source for ratiometric analog signal scaling. Use Value: Radiation-hardened operation ensures no parametric shift after 100 krad(Si) exposure. | Use Scenario: Providing stable 2.7 V reference in PLC analog I/O modules exposed to industrial EMI. IC Role / Device Role / Timing Role: Shunt regulator stabilizing op-amp supply rails in noisy factory environments. Use Value: Low reverse leakage (<60 µA) prevents reference drift in high-impedance divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4371A-1 | Non-RoHS, same electrical specs and JANTXV qualification, but uses tin-lead plating | Required where legacy solder processes mandate Pb-based termination | Select when RoHS exemption applies and MIL-spec tin-lead finish is mandated |
| BZX55C2V7 | Commercial-grade, 500 mW, ±5%, DO-35, but not MIL-qualified or radiation-hardened | Suitable only for non-military commercial equipment with benign thermal/EMI environment | Choose for cost-sensitive industrial prototypes lacking radiation or extended temp requirements |
Compared with 1N4371E3, 1N4371A-1 offers identical regulation performance with legacy plating, while BZX55C2V7 provides functional equivalence only in non-radiation, non-military contexts - neither is pin-compatible in qualification scope or environmental hardening.
Availability
1N4371E3 is available at Aetrix Electronics and suitable for avionics power regulation, military radio biasing, spacecraft sensor conditioning, and industrial process controller reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4371E3 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 1N4371E3 belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, designed specifically for voltage regulation in mission-critical defense, space, and industrial control systems demanding guaranteed performance under extreme stress.
FAQ
What is the Zener voltage and tolerance of the 1N4371E3?
The 1N4371E3 has a nominal Zener voltage of 2.7 V with a ±5% tolerance, measured at IZT = 20 mA and 25 °C. This tolerance reflects the standard A-suffix designation per JEDEC nomenclature and supports applications where moderate regulation accuracy suffices without tighter binning.
Is the 1N4371E3 RoHS compliant?
Yes, the 1N4371E3 is RoHS compliant, as indicated by the "e3" suffix in its part number. This compliance applies exclusively to the commercial-grade version; the e3 marking confirms annealed matte-tin plating meeting EU Directive 2011/65/EU requirements.
What is the maximum power dissipation rating for the 1N4371E3?
The 1N4371E3 is rated for 500 mW average power dissipation at TL = +50 °C with 0.375 inch lead length from body. Power derates linearly to zero at +175 °C, and on PCB mounting, it is limited to 400 mW at TA = +55 °C per Figure 2 in the datasheet.
Does the 1N4371E3 have radiation-hardened characteristics?
Yes, the 1N4371E3 is inherently radiation-hardened per Microsemi MicroNote 050. Its metallurgically bonded DO-35 construction provides proven resilience to total ionizing dose (TID), making it suitable for low-earth orbit and nuclear-hardened ground systems without additional shielding.
What does the "E3" suffix mean in 1N4371E3?
The "E3" suffix in 1N4371E3 denotes RoHS-compliant matte-tin plating per JEDEC nomenclature. It distinguishes this commercial-grade variant from non-RoHS versions like 1N4371A-1 (tin-lead) and confirms compliance with environmental directives while retaining full MIL-PRF-19500/127 JANTXV qualification.
1N4371E3 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:
- ±10%
- 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)
1N4371E3 FAQ
1.How can I place an order for 1N4371E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4371E3 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 1N4371E3 reliable?
The price and inventory of 1N4371E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4371E3 is usually 5 days.
3.What payment methods are accepted for 1N4371E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4371E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4371E3?
1N4371E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4371E3 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 1N4371E3?
For technical support, including 1N4371E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4371E3 requirements.
6.How does Aetrix verify that 1N4371E3 is sourced from the original manufacturer or authorized distributors?
All 1N4371E3 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 1N4371E3 meets industry standards.
7.What is the process for return or replacement of 1N4371E3?
All 1N4371E3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4371E3, 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 1N4371E3 part is unused and in its original packaging.
Return procedure for 1N4371E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4371E3 Tags
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