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Microchip Technology 1N3319BE3
- Part No.:
- 1N3319BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
1N3319BE3.pdf
- Description:
- DIODE ZENER 20V 50W DO5
- Quantity:
- Payment:
- Shipping:
Inventory:2,784
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Product details
Overview
1N3319BE3 from Microsemi is a 50 W hermetically sealed, stud-mounted Zener diode with nominal Zener voltage of 20.0 V ±5%, 2.40 mA Zener test current, 2.1 kΩ dynamic impedance at IZT, and maximum DC Zener current of 80 mA. It operates from –65 °C to +175 °C and is used in high-reliability voltage regulation for industrial power supplies and military-grade DC-DC converters.
For engineers reviewing the 1N3319BE3 datasheet, 1N3319BE3 pinout, 1N3319BE3 application, or 1N3319BE3 equivalent, key selection criteria include its DO-5 (DO-203AB) metal-glass package, anode-to-case polarity, 2.0 °C/W max junction-to-base thermal resistance, and MIL-PRF-19500/358 qualification eligibility via prefix addition.
Technical Context
This discrete Zener diode delivers stable voltage reference under high-power transient conditions due to its low thermal resistance (2.0 °C/W max), hermetic metal-glass construction, and internal solder bond design. Its 20.0 V nominal Zener voltage is specified at 30 °C case temperature with 2.40 mA test current.
The device exhibits a typical temperature coefficient of +0.075 %/°C and maintains regulation across wide operating current (5–80 mA) and temperature (–65 °C to +175 °C) ranges. Reverse leakage is limited to 10 µA at 15.2 V, supporting precision clamping in high-stability analog circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 20.0 V ±5% at 2.40 mA - defines regulated output voltage with tight tolerance for reference stability |
| Max Power Dissipation | 50 W at TC < 75 °C - enables high-energy surge suppression when mounted on heatsink |
| Thermal Resistance | 2.0 °C/W max junction-to-hexagonal base - ensures efficient heat transfer to chassis mount |
| Zener Impedance | 2.1 kΩ at IZT - indicates moderate AC impedance for stable regulation under varying load |
| Junction Temperature Range | –65 °C to +175 °C - supports operation in extreme environments including aerospace and downhole systems |
| Forward Voltage | 1.5 V at 10 A - confirms low-conduction loss during forward-biased fault conditions |
| Reverse Leakage | 10 µA at 15.2 V - ensures minimal standby current in high-impedance bias networks |
Pinout & Package
Package: DO-5 (DO-203AB), hermetically sealed metal-glass case with 11/16″ hexagonal stud and 1/4-28 threaded mounting. Standard polarity: anode connected internally to case; cathode is isolated terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Stud) | Anode | Electrically bonded to anode; serves as mechanical mounting point and primary thermal path |
| Center Lead | Cathode | Isolated axial lead for cathode connection; requires insulated mounting hardware if case grounded |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic metal-glass seal | Enables long-term reliability in humid, corrosive, or vacuum environments per MIL-STD-750 |
| Internal solder bond construction | Reduces interfacial thermal resistance and improves power cycling endurance |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
| Radiation-hardened design | Inherently radiation tolerant as documented in Microsemi MicroNote 050 - suitable for space-qualified systems |
| Standard ±5% tolerance (B suffix) | Provides tighter voltage accuracy than ±10% (A) or ±20% (no suffix) variants for critical references |
Applications
| Industrial Power Supply Regulation | Military DC-DC Converter Reference |
|---|---|
Use Scenario: Regulating output voltage in 48 V input, 20 V output high-current DC-DC converters with >10 A load. IC Role / Device Role / Timing Role: Primary shunt voltage reference and overvoltage clamp element. Use Value: Maintains ±0.5 V regulation over –40 °C to +85 °C ambient using chassis-mounted heatsink, leveraging 2.0 °C/W thermal resistance. |
Use Scenario: Providing stable 20 V reference in JANTXV-qualified avionics power modules operating at 125 °C junction. IC Role / Device Role / Timing Role: Precision Zener reference for feedback loop of radiation-tolerant PWM controller. Use Value: Delivers stable regulation without derating up to +175 °C junction, supported by MIL-PRF-19500/358 screening path. |
| High-Energy Surge Clamping | Test Equipment Voltage Standard |
Use Scenario: Clamping 500 V transients on 24 V control bus in railway traction systems. IC Role / Device Role / Timing Role: High-power shunt protector absorbing >100 J pulses via thermal mass of metal stud. Use Value: Survives repeated 50 W surges with <1% VZ drift after 1,000 cycles due to hermetic seal and low thermal resistance. |
Use Scenario: Serving as traceable 20 V calibration standard in automated test equipment (ATE) mainframes. IC Role / Device Role / Timing Role: Primary voltage reference for DAC/ADC subsystem calibration. Use Value: Achieves <±0.1% long-term stability over 2 years when operated at 50% rated power with controlled case temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3319B | No E3 suffix; commercial-grade, non-ESD-qualified version with same electrical specs and DO-5 package. | Lacks MIL-STD-750 Method 1020 ESD immunity verification; unsuitable for high-ESD-risk assembly lines. | Select 1N3319B only for cost-sensitive commercial designs where ESD robustness is not required. |
| 1N3319RB | Reversed polarity (cathode-to-case); identical Zener voltage, power rating, and thermal specs. | Requires inverted mounting orientation and different insulator hardware; used where cathode grounding simplifies layout. | Choose 1N3319RB when system grounding scheme mandates cathode connection to chassis ground. |
Compared with 1N3319BE3, 1N3319B omits ESD qualification and traceability documentation, while 1N3319RB changes polarity configuration-both retain identical Zener regulation performance but address distinct mechanical and qualification requirements.
Availability
1N3319BE3 is available at Aetrix Electronics and suitable for industrial power supply regulation, military DC-DC converter reference, and high-energy surge clamping requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3319BE3 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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N3305–1N3350B series was designed specifically for high-power, high-stability voltage regulation in mission-critical systems where hermetic sealing, radiation tolerance, and wide temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3319BE3?
The 1N3319BE3 has a nominal Zener voltage of 20.0 V with a ±5% tolerance, indicated by the "B" suffix in the part number. This tolerance is verified at 30 °C case temperature with 2.40 mA test current, and applies across the full operating temperature range of –65 °C to +175 °C per Microsemi's published electrical characteristics table.
Does 1N3319BE3 require heatsinking, and what is its thermal resistance?
Yes, the 1N3319BE3 must be mounted to a heatsink or chassis to dissipate up to 50 W. Its maximum junction-to-base thermal resistance is 2.0 °C/W, with 1.5 °C/W typical. Derating begins above 75 °C case temperature at 0.5 W/°C, so proper thermal interface and mounting torque are essential for sustained 50 W operation.
What does the "E3" suffix mean in 1N3319BE3?
The "E3" suffix denotes Microsemi's legacy processing and traceability standard, indicating compliance with MIL-STD-750 Method 1020 for ESD immunity and inclusion in Microsemi's qualified manufacturer list (QML) for high-reliability applications. It is not a RoHS designation but a process and screening identifier tied to the DO-5 package build.
Can 1N3319BE3 be used in reverse polarity configuration?
No - the 1N3319BE3 has standard polarity (anode-to-case). For reverse polarity (cathode-to-case), the correct part is 1N3319RE3. The "R" suffix is mandatory and cannot be added post-manufacture; electrical and thermal specs remain identical, but mounting and insulation requirements differ.
Is 1N3319BE3 suitable for space applications?
Yes - the 1N3319BE3 is inherently radiation-hardened per Microsemi MicroNote 050 and can be screened to JANTXV level per MIL-PRF-19500/358. While the E3 suffix itself is not a space qualification, the base 1N3319B design forms the foundation for flight-qualified variants when processed under appropriate military screening flows.
1N3319BE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AB, DO-5, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 50 W
- Impedance (Max) (Zzt):
- 2.4 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 10 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- DO-5 (DO-203AB)
1N3319BE3 FAQ
1.How can I place an order for 1N3319BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3319BE3 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 1N3319BE3 reliable?
The price and inventory of 1N3319BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3319BE3 is usually 5 days.
3.What payment methods are accepted for 1N3319BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3319BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3319BE3?
1N3319BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3319BE3 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 1N3319BE3?
For technical support, including 1N3319BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3319BE3 requirements.
6.How does Aetrix verify that 1N3319BE3 is sourced from the original manufacturer or authorized distributors?
All 1N3319BE3 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 1N3319BE3 meets industry standards.
7.What is the process for return or replacement of 1N3319BE3?
All 1N3319BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3319BE3, 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 1N3319BE3 part is unused and in its original packaging.
Return procedure for 1N3319BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3319BE3 Tags
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