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Microchip Technology JANTX1N4965DUS/TR
- Part No.:
- JANTX1N4965DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4965DUS/TR.pdf
- Description:
- DIODE ZENER 20V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,482
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Product details
Overview
JANTX1N4965DUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 20 V, ±5% tolerance (D suffix), 65 mA test current, and 4.5 Ω dynamic impedance at IZT. It operates from −65 °C to +175 °C and delivers stable voltage regulation in high-reliability power supply and reference circuits for aerospace and defense systems.
For engineers reviewing the JANTX1N4965DUS/TR datasheet, JANTX1N4965DUS/TR pinout, JANTX1N4965DUS/TR application, or JANTX1N4965DUS/TR equivalent, this part is selected for critical biasing, overvoltage clamping, and precision reference roles where voidless-glass construction, radiation hardness, and MIL-PRF-19500/356 qualification are mandatory.
Technical Context
This device belongs to the JANTX-grade 1N49xxUS series, featuring triple-layer passivation and Category I internal metallurgical bonds for enhanced reliability. Its voidless hermetic glass package with tungsten slugs ensures robust thermal performance and long-term stability under extreme environmental stress.
It regulates voltage across a broad operating current range (10–50% of IZM) with low temperature coefficient (+0.085 %/°C) and maintains ≤1.5 V regulation deviation (ΔVZ) between 10% and 50% of maximum Zener current - critical for precision analog references in avionics and space-grade electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal at 65 mA test current - sets precise DC reference level in regulated supplies. |
| Power Dissipation | 5 W @ TEC = 125 °C - supports continuous operation in high-temperature chassis-mounted applications. |
| Dynamic Impedance (ZZ) | 4.5 Ω at IZT - ensures minimal output voltage variation under load transients. |
| Max Reverse Leakage (IR) | 2 μA at 15.2 V - guarantees low standby power loss in battery-backed or low-power monitoring circuits. |
| Temp Coefficient (αVZ) | +0.085 %/°C - enables predictable drift compensation in wide-temperature-range instrumentation. |
| Surge Current (IZSM) | 8.0 A (8.3 ms square wave) - withstands transient overvoltage events without degradation. |
| Forward Voltage (VF) | 1.50 V at 1.0 A - defines conduction threshold during reverse-polarity fault protection. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" or "D-5B") with copper end caps (Sn/Pb finish); cathode indicated by band; weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference node | Provides low-resistance path for forward conduction during fault conditions or startup sequencing. |
| Cathode | Regulated output node in reverse breakdown; marked with band | Serves as stable voltage reference source; must be decoupled locally to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk over 20+ year mission life in vacuum or humid environments. |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling survivability beyond 1000 cycles between −65 °C and +175 °C. |
| MIL-PRF-19500/356 qualification | Validated for use in Class H (−65 °C to +125 °C) and Class K (+175 °C) military applications with full lot traceability. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift - simplifies handling and assembly in cleanroom and field-deployable systems. |
| Inherent radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for low-earth orbit satellite power management subsystems. |
Applications
| Aerospace Power Conditioning | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary rail in satellite power distribution units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for DC-DC converter feedback loops. Use Value: Maintains <±1.5% output accuracy over −65 °C to +125 °C with no parameter drift after 100 krad(Si) exposure. |
Use Scenario: Biasing precision op-amps in radar receiver front-end calibration circuitry. IC Role / Device Role / Timing Role: Stable 20 V reference source for ADC driver stages and gain-setting networks. Use Value: Delivers <2 μA leakage at 15.2 V, minimizing input offset error in high-impedance sensor interfaces. |
| Avionics Sensor Excitation | Tactical Radio Voltage Clamp |
Use Scenario: Supplying excitation voltage to strain gauge bridges in flight control actuator modules. IC Role / Device Role / Timing Role: Low-noise, low-drift Zener shunt regulator for bridge excitation rails. Use Value: 4.5 Ω dynamic impedance ensures <50 μV ripple rejection at 10 kHz switching frequencies. |
Use Scenario: Clamping transient surges on RF power amplifier bias lines during antenna switching events. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing 8.0 A surge pulses without failure. Use Value: Survives repeated 8.3 ms surges up to 8 A while retaining VZ within ±0.5% of initial value. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4965DUS/TR | Higher screening grade (JANTXV) with extended burn-in and 100% parametric testing per MIL-PRF-19500/356. | Required for Class K (175 °C) operation and mission-critical launch vehicle avionics. | Select when full JANTXV screening and guaranteed 175 °C operation are mandated by system spec. |
| 1N4965US (non-JANTX) | Commercial-grade version with same electrical specs but no MIL-PRF-19500 qualification or radiation data. | Suitable only for non-military industrial prototypes or cost-sensitive ground-test hardware. | Choose only for bench validation or non-flight hardware where MIL-spec compliance is not required. |
Compared with JANTX1N4965DUS/TR, JANTXV1N4965DUS/TR adds full high-temperature burn-in and radiation assurance for spaceflight, while 1N4965US omits all military screening - making JANTX1N4965DUS/TR the optimal balance of reliability, qualification, and cost for tactical-grade defense platforms.
Availability
JANTX1N4965DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference design, and avionics sensor excitation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANTX1N4965DUS/TR 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 JANTX1N4965DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where hermeticity, radiation tolerance, and extreme temperature resilience are non-negotiable.
FAQ
What is the Zener voltage tolerance of JANTX1N4965DUS/TR?
JANTX1N4965DUS/TR has a nominal Zener voltage of 20 V with ±5% tolerance, indicated by the "D" suffix per Microsemi's standard coding. This tolerance applies at 25 °C and 65 mA test current, and remains stable across its full operating temperature range due to its low +0.085 %/°C temperature coefficient.
Is JANTX1N4965DUS/TR suitable for space applications?
Yes, JANTX1N4965DUS/TR is inherently radiation-hardened to 100 krad(Si) total ionizing dose per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/356. Its voidless hermetic glass package and Category I metallurgical bond make it suitable for low-earth orbit satellite power and telemetry subsystems.
What is the maximum continuous Zener current for JANTX1N4965DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4965DUS/TR is 395 mA at TEC = 125 °C. Derating is linear above 125 °C, reaching zero at 175 °C. This rating assumes proper PCB thermal relief and end-cap solder joint integrity per Microsemi's recommended pad layout.
Does JANTX1N4965DUS/TR require external heat sinking?
No, JANTX1N4965DUS/TR does not require external heat sinking when mounted on a standard FR-4 PCB with Microsemi's recommended "D-5B" pad layout. Its junction-to-end-cap thermal resistance is 10 °C/W, and the 5 W power rating is fully usable at TEC = 125 °C with adequate copper area.
How is polarity identified on JANTX1N4965DUS/TR?
Polarity on JANTX1N4965DUS/TR is indicated by a visible cathode band on the glass body - the banded end is the cathode, which connects to the regulated voltage node. The unmarked end is the anode, typically tied to ground or the return path in shunt regulator configurations.
JANTX1N4965DUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 4.5 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTX1N4965DUS/TR FAQ
1.How can I place an order for JANTX1N4965DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4965DUS/TR 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 JANTX1N4965DUS/TR reliable?
The price and inventory of JANTX1N4965DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4965DUS/TR is usually 5 days.
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Once your JANTX1N4965DUS/TR 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 JANTX1N4965DUS/TR?
For technical support, including JANTX1N4965DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4965DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4965DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4965DUS/TR 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 JANTX1N4965DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4965DUS/TR?
All JANTX1N4965DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4965DUS/TR, 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 JANTX1N4965DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4965DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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