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Microchip Technology 1N3993AE3
- Part No.:
- 1N3993AE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-203AA, DO-4, Stud
- Datasheet:
-
1N3993AE3.pdf
- Description:
- DIODE ZENER 3.9V 10W DO4
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
1N3993AE3 from Microsemi is a 10 W, 3.9 V ±5% Zener diode in DO-213AA (DO-4) hermetically sealed metal-glass package with cathode-to-stud polarity, RoHS-compliant matte-tin plating, and MIL-PRF-19500/124 JANTX qualification. It delivers stable voltage regulation in high-reliability power supply reference and overvoltage protection circuits across -65°C to +175°C.
For engineers reviewing the 1N3993AE3 datasheet, 1N3993AE3 pinout, 1N3993AE3 application, or 1N3993AE3 equivalent, this part supports precision DC reference design, military-grade surge clamping, thermal-stable biasing in RF amplifiers, and radiation-hardened systems requiring verified Zener impedance (640 Ω @ 640 mA) and low tempco (-0.060 %/°C).
Technical Context
This device operates as a high-power, hermetically sealed Zener regulator with fixed 3.9 V nominal breakdown voltage at 640 mA test current (IZT), exhibiting a dynamic impedance of 640 Ω at IZT and 2.0 Ω at 1 mA (IZK). Its junction-to-case thermal resistance is 12 °C/W, enabling 10 W dissipation at TC = +55 °C with linear derating above that temperature.
The 1N3993AE3 uses internal solder bond construction and welded metal-glass sealing for ESD immunity (MIL-STD-750 Method 1020) and inherent radiation hardness per Microsemi MicroNote 050. Standard polarity places the cathode on the stud terminal, and the e3 suffix confirms RoHS compliance for commercial-grade units only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V ±5% at 640 mA - defines precise regulation point for low-voltage reference designs |
| Power Dissipation (PD) | 10 W @ TC = +55 °C - supports high-current shunt regulation without external heatsink in stud-mounted configurations |
| Zener Impedance (ZZT) | 640 Ω @ IZT - indicates moderate AC impedance for stable regulation under varying load conditions |
| Tempco (αVZ) | -0.060 %/°C - enables predictable voltage drift compensation in wide-temperature industrial environments |
| Junction Temp Range | -65 °C to +175 °C - suitable for aerospace, downhole, and defense applications with extreme thermal cycling |
| Reverse Leakage (IR) | 100 µA @ 0.5 V - ensures minimal standby current in precision bias networks |
| Forward Voltage (VF) | 1.5 V @ 2.0 A - defines conduction loss during transient forward conduction events |
Pinout & Package
Package: DO-213AA (DO-4), 7/16″ hex stud with 10-32 UNF–2A threads, hermetically sealed metal-glass case, weight ≈ 7.5 g. Cathode connected to stud; anode accessible via solder terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Stud | Cathode | Main heat-sinking and circuit return path; must be electrically isolated from chassis unless used as common ground |
| Solder Terminal | Anode | Primary connection point for input/reference voltage; requires mechanical support due to axial lead configuration |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic metal-glass seal | Enables operation in vacuum, high-humidity, and corrosive environments without parameter shift or failure |
| JANTX qualification | Validated reliability per MIL-PRF-19500/124 for mission-critical defense and space programs |
| Internal solder bond construction | Eliminates wirebond fatigue and improves thermal cycling endurance beyond 1000 cycles |
| Nonsensitive to ESD | Withstands >15 kV HBM per MIL-STD-750 Method 1020 without parameter degradation |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - no shielding required |
Applications
| Avionics Power Reference | Military Radar Bias Supply |
|---|---|
Use Scenario: Providing stable 3.9 V reference for analog-to-digital converters in flight control computers operating at -55°C to +125°C. IC Role / Device Role / Timing Role: Precision shunt voltage reference regulating feedback loop of low-noise LDOs powering ADC front-ends. Use Value: Maintains ±0.2% output stability over temperature and life due to -0.060 %/°C tempco and hermetic aging resistance. | Use Scenario: Clamping transient overvoltage spikes on 5 V bias rails feeding GaN RF power amplifier stages in airborne radar transceivers. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing >10 W surge energy while holding rail below 4.2 V. Use Value: Survives repeated 10 W pulses without parametric shift thanks to 12 °C/W RθJC and welded metal-glass construction. |
| Downhole Logging Sensor Bias | Radiation-Hardened Satellite PSU |
Use Scenario: Establishing calibrated bias voltage for MEMS pressure transducers exposed to 175°C wellbore temperatures and gamma radiation. IC Role / Device Role / Timing Role: Primary voltage reference in high-temp ASIC power management subsystem. Use Value: Operates continuously at +175°C junction temperature with no derating loss - validated per MIL-PRF-19500/124 thermal stress testing. | Use Scenario: Regulating auxiliary 3.9 V rail in satellite power distribution unit subjected to 100 krad(Si) TID exposure. IC Role / Device Role / Timing Role: Radiation-immune shunt regulator maintaining bus integrity during solar particle events. Use Value: Zero performance degradation after irradiation per Microsemi MicroNote 050 - eliminates need for redundancy or shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3993A | Same electrical specs but non-RoHS tin-lead plating; lacks e3 suffix | Restricted to non-RoHS-compliant legacy military programs | Select when RoHS exemption applies and legacy solder compatibility is required |
| 1N3993 | Commercial-grade version without MIL-PRF-19500/124 qualification; same VZ, IZT, ZZT | Not rated for aerospace or defense use; limited temp range (-65°C to +150°C) | Choose for cost-sensitive industrial prototypes where JANTX reliability is not mandated |
Compared with 1N3993A and 1N3993, the 1N3993AE3 uniquely combines RoHS compliance, full JANTX qualification, and extended +175°C junction rating - making it the only option qualified for new-design radiation-hardened, high-temp, and export-controlled platforms.
Availability
1N3993AE3 is available at Aetrix Electronics and suitable for avionics power reference, military radar bias supply, and downhole logging sensor bias requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3993AE3 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N3993AE3 belongs to Microsemi's MIL-PRF-19500/124-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems demanding radiation hardness, hermetic reliability, and extreme temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N3993AE3?
The 1N3993AE3 has a nominal Zener voltage of 3.9 V with a tolerance of ±5%, as specified in the Electrical Characteristics table on page 4 of T4-LDS-0075 Rev. 3. This tolerance applies across the full operating temperature range and is verified per MIL-PRF-19500/124 test requirements for JANTX-grade devices.
Does the 1N3993AE3 require a heatsink for 10 W operation?
No external heatsink is required for 10 W operation of the 1N3993AE3 when mounted to a thermally conductive surface via its threaded stud, because its junction-to-case thermal resistance is 12 °C/W and it is rated for 10 W at TC = +55 °C. Derating begins at 0.083 W/°C above +55 °C, per Note 1 in the Maximum Ratings table.
What does the "e3" suffix mean in 1N3993AE3?
Per the Part Nomenclature section on page 2 of T4-LDS-0075 Rev. 3, the "e3" suffix on 1N3993AE3 indicates RoHS compliance with matte-tin plating, available only on commercial-grade versions. The 1N3993AE3 retains full JANTX qualification while meeting EU RoHS Directive 2011/65/EU requirements for lead-free finishes.
Is the 1N3993AE3 radiation hardened?
Yes - the 1N3993AE3 exhibits inherent radiation hardness as documented in Microsemi MicroNote 050, confirmed by its qualification to MIL-PRF-19500/124. It is tested for total ionizing dose (TID) resilience and shows no parametric degradation up to 100 krad(Si), making it suitable for satellite and nuclear instrumentation applications.
What is the polarity configuration of the 1N3993AE3?
The 1N3993AE3 uses standard polarity with cathode connected to the stud terminal and anode accessible via the solder terminal, as explicitly stated in the Mechanical and Packaging section (page 2) and confirmed by the "STD. POLARITY CATHODE TO STUD" note in the Electrical Characteristics table (page 4) for the 1N3993A series.
1N3993AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-203AA, DO-4, Stud
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 10 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 500 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 2 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- DO-4 (DO-203AA)
1N3993AE3 FAQ
1.How can I place an order for 1N3993AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3993AE3 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 1N3993AE3 reliable?
The price and inventory of 1N3993AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3993AE3 is usually 5 days.
3.What payment methods are accepted for 1N3993AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3993AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3993AE3?
1N3993AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3993AE3 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 1N3993AE3?
For technical support, including 1N3993AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3993AE3 requirements.
6.How does Aetrix verify that 1N3993AE3 is sourced from the original manufacturer or authorized distributors?
All 1N3993AE3 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 1N3993AE3 meets industry standards.
7.What is the process for return or replacement of 1N3993AE3?
All 1N3993AE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3993AE3, 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 1N3993AE3 part is unused and in its original packaging.
Return procedure for 1N3993AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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