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Microchip Technology 1N3323BE3
- Part No.:
- 1N3323BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-203AB, DO-5, Stud
- Datasheet:
-
1N3323BE3.pdf
- Description:
- DIODE ZENER 27V 50W DO5
- Quantity:
- Payment:
- Shipping:
Inventory:5,822
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Product details
Overview
1N3323BE3 from Microsemi is a hermetically sealed, 50 W, 27 V Zener diode in DO-5 (DO-203AB) metal-glass package with anode-to-case polarity, ±5% voltage tolerance (B suffix), and 2.0 °C/W max junction-to-base thermal resistance. It delivers stable voltage regulation in high-reliability power supply and protection circuits operating up to 175 °C junction temperature.
For engineers reviewing the 1N3323BE3 datasheet, 1N3323BE3 pinout, 1N3323BE3 application, or 1N3323BE3 equivalent, this page provides verified electrical specs, mechanical packaging details, thermal derating guidance, military-grade qualification context (JANTXV-compatible), and real-world use cases for high-power industrial and aerospace voltage reference and overvoltage clamping.
Technical Context
This 27 V Zener operates at 2.8 mA test current (IZT) with 460 Ω dynamic impedance (ZZT) and 2.0 °C/W thermal resistance, enabling stable regulation under high-current transients when mounted on a thermally conductive stud. Its low 10 µA reverse leakage at 20.6 V (VR) supports precision clamping across wide temperature ranges.
The device uses internal solder bond construction and welded hermetic sealing per MIL-PRF-19500/358, supporting JAN/JANTX/JANTXV screening levels. Standard polarity connects anode to case; reverse polarity (cathode-to-case) requires R suffix (e.g., 1N3323RBE3), not applicable to this B-suffix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 27.0 V at 30 °C case temperature - defines primary regulation point for power rail stabilization. |
| Zener Test Current (IZT) | 2.8 mA - operating point where VZ and ZZT are specified; used for calibration and biasing. |
| Max Dynamic Impedance (ZZT) | 460 Ω at IZT - indicates voltage stability under small-signal AC variations; lower values improve regulation fidelity. |
| DC Power Dissipation | 50 W at TC < 75 °C - maximum continuous power handling with adequate heat sinking. |
| Thermal Resistance (θJC) | 2.0 °C/W max junction-to-hexagonal base - enables thermal modeling for stud-mount heatsink design. |
| Reverse Leakage Current (IR) | 10 µA at 20.6 V (VR) - ensures minimal standby power loss and tight clamping threshold definition. |
| Temp. Coefficient (αVZ) | +0.085 %/°C - quantifies VZ drift with temperature; positive slope aids compensation in multi-diode stacks. |
Pinout & Package
Package: DO-5 (DO-203AB), hermetically sealed metal-glass case with 11/16″ hexagonal stud and 1/4-28 threaded mounting. Anode connected internally to case (standard polarity); cathode is isolated terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Hex Stud) | Anode | Primary current path and thermal conduction interface; must be electrically grounded or referenced per circuit topology. |
| Center Lead | Cathode | High-impedance output node for voltage reference or clamping; requires mechanical isolation if case is biased above ground. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic metal-glass seal | Enables operation in harsh environments (military/aerospace) with zero moisture ingress risk over lifetime. |
| JAN/JANTX/JANTXV qualification path | Supports full MIL-PRF-19500/358 screening via prefix addition (e.g., JANTXV1N3323BE3) without redesign. |
| ±5% Zener voltage tolerance (B suffix) | Reduces binning requirements and simplifies system-level calibration vs. ±10% (A) or ±20% (no suffix) variants. |
| Low thermal resistance (2.0 °C/W max) | Allows 50 W dissipation with ≤100 °C case-to-ambient ΔT using standard stud-mount heatsinks. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection during handling and assembly in automated lines. |
Applications
| Industrial Power Supply Regulation | Aerospace Overvoltage Protection |
|---|---|
Use Scenario: Regulating +28 V DC bus in ruggedized PLC power modules exposed to load dump transients. IC Role / Device Role / Timing Role: Primary shunt voltage reference and crowbar element in unregulated transformer-rectifier stage. Use Value: Maintains 27 V clamp with <10 µA leakage at 20.6 V, ensuring stable downstream logic supply despite ±15% input variation. |
Use Scenario: Protecting avionics sensor interfaces against 100 V surge events per DO-160 Section 22. IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor placed directly at connector entry point. Use Value: Absorbs 50 W peak energy within 10 ms while holding clamped voltage to ≤29.2 V (27 V × 1.085), preserving signal integrity. |
| Military Radar Bias Supply | High-Temperature Oilfield Electronics |
Use Scenario: Providing stable bias voltage for GaN RF amplifier stages in ground-based radar transmitters. IC Role / Device Role / Timing Role: Precision Zener reference in series-pass regulator feeding amplifier gate drivers. Use Value: Delivers ±0.23 V total drift (0.085%/°C × 27 V × 100 °C ΔT) across -55 °C to +125 °C ambient, meeting MIL-STD-810G thermal cycling spec. |
Use Scenario: Voltage clamping in downhole telemetry controllers operating at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature-stable shunt regulator for microcontroller reset circuitry. Use Value: Functions reliably at 175 °C junction temperature with no parameter degradation, validated per MIL-PRF-19500/358 stress testing. |
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 |
|---|---|---|---|
| 1N3323B (non-E3) | Same electrical specs and DO-5 package; lacks Microsemi's enhanced E3 plating (SnPb-free, RoHS-compliant finish). | Not qualified for lead-free assembly processes requiring Pb-free terminations per J-STD-020. | Select 1N3323BE3 for RoHS-compliant production; choose 1N3323B only for legacy SnPb reflow or non-RoHS programs. |
| 1N3323RBE3 | Identical 27 V/50 W specs but reverse polarity (cathode-to-case); same E3 finish and screening eligibility. | Required when circuit topology demands cathode grounding (e.g., floating supply monitoring or differential clamping). | Use 1N3323RBE3 only if schematic assigns cathode to chassis ground; otherwise 1N3323BE3 is correct standard-polarity fit. |
Compared with 1N3323B and 1N3323RBE3, the 1N3323BE3 uniquely combines RoHS-compliant E3 termination with standard anode-to-case polarity-enabling drop-in replacement in new designs requiring both environmental compliance and legacy-compatible mounting geometry.
Availability
1N3323BE3 is available at Aetrix Electronics and suitable for industrial power supply regulation, aerospace overvoltage protection, and military radar bias supply requiring stable component supply across extended temperature and reliability lifecycles.
Supply support for 1N3323BE3 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing radiation hardness and long-term parametric stability.
The 1N33xxB series was engineered specifically for high-power, high-temperature voltage regulation and transient suppression in mission-critical systems where hermeticity, thermal robustness, and MIL-spec qualification are mandatory.
FAQ
What is the Zener voltage tolerance for 1N3323BE3?
The 1N3323BE3 has a nominal Zener voltage of 27.0 V with a ±5% tolerance, indicated by the "B" suffix per JEDEC standards. This means the actual measured VZ at 2.8 mA and 30 °C case temperature falls between 25.65 V and 28.35 V. The tolerance is verified during final test and applies across the full -65 °C to +175 °C junction temperature range.
Does 1N3323BE3 support military-grade screening?
Yes, the 1N3323BE3 is eligible for full MIL-PRF-19500/358 screening by adding appropriate prefixes: JAN1N3323BE3, JANTX1N3323BE3, or JANTXV1N3323BE3. These variants undergo rigorous environmental stress testing including thermal shock, vibration, and burn-in, with documentation traceable to Microsemi's Scottsdale Division quality system.
What is the maximum power dissipation for 1N3323BE3 at 100 °C case temperature?
At 100 °C case temperature, the 1N3323BE3 is derated from its 50 W rating at ≤75 °C. With a derating factor of 0.5 W/°C above 75 °C, the allowable power drops to 37.5 W (50 W − [0.5 W/°C × 25 °C]). This value assumes proper stud mounting and thermal interface to maintain uniform case temperature measurement.
Is 1N3323BE3 compatible with lead-free reflow processes?
Yes, the "E3" suffix on 1N3323BE3 denotes a matte tin (Sn) plating compliant with J-STD-020 and RoHS Directive 2011/65/EU. It withstands peak reflow temperatures up to 260 °C for 10 seconds, matching standard lead-free solder profiles. The hermetic seal prevents intermetallic formation or plating degradation during thermal cycling.
How does the temperature coefficient affect 1N3323BE3 performance in a 100 °C ambient environment?
The 1N3323BE3 has a +0.085 %/°C temperature coefficient. Over a 100 °C rise from 25 °C reference, VZ increases by approximately +0.23 V (27 V × 0.00085 × 100). This predictable positive drift allows designers to compensate in feedback networks or select complementary components for stable overall regulation.
1N3323BE3 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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 50 W
- Impedance (Max) (Zzt):
- 2.8 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 20.6 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)
1N3323BE3 FAQ
1.How can I place an order for 1N3323BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3323BE3 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 1N3323BE3 reliable?
The price and inventory of 1N3323BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3323BE3 is usually 5 days.
3.What payment methods are accepted for 1N3323BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3323BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3323BE3?
1N3323BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3323BE3 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 1N3323BE3?
For technical support, including 1N3323BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3323BE3 requirements.
6.How does Aetrix verify that 1N3323BE3 is sourced from the original manufacturer or authorized distributors?
All 1N3323BE3 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 1N3323BE3 meets industry standards.
7.What is the process for return or replacement of 1N3323BE3?
All 1N3323BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3323BE3, 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 1N3323BE3 part is unused and in its original packaging.
Return procedure for 1N3323BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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