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Microchip Technology JANTXV1N4974DUS/TR
- Part No.:
- JANTXV1N4974DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4974DUS/TR.pdf
- Description:
- DIODE ZENER 47V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,901
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Product details
Overview
JANTXV1N4974DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with nominal Zener voltage of 47 V at 25 mA test current, ±5% tolerance, and maximum dynamic impedance of 25 Ω at IZT. It operates across –65 °C to +175 °C and is used in high-reliability voltage regulation for avionics power conditioning and radiation-hardened instrumentation.
For engineers reviewing the JANTXV1N4974DUS/TR datasheet, JANTXV1N4974DUS/TR pinout, JANTXV1N4974DUS/TR application, or JANTXV1N4974DUS/TR equivalent, key selection criteria include its voidless-glass package, Category III metallurgical bond, 10 °C/W junction-to-end-cap thermal resistance, and compliance with MIL-PRF-19500/356 Class V screening.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators, featuring triple-layer passivation and internal Category III metallurgical bonds per MIL-PRF-19500/356. Its voidless hermetic glass construction ensures long-term stability under thermal cycling and high-humidity environments.
It delivers regulated voltage over wide current (10%–50% IZM) and temperature ranges, with ΔVZ ≤ 3.5 V across that current range and αVZ = +0.095 %/°C at IZT, enabling predictable drift compensation in precision analog supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 47 V ±5% at IZT = 25 mA - defines stable regulation point for mid-range DC supplies |
| Power Dissipation | 5 W @ TEC = 125 °C - requires heatsinking via end-cap thermal path in high-temp enclosures |
| Dynamic Impedance ZZ | 25 Ω max at IZT - limits output voltage variation under load transients |
| Max Reverse Leakage IR | 2 μA at VR = 35.8 V - ensures minimal quiescent current in standby circuits |
| Thermal Resistance θJC | 10 °C/W junction-to-end-cap - dictates minimum copper area needed on PCB for thermal relief |
| Surge Current IZSM | 5.5 A (8.3 ms square wave) - supports transient overvoltage clamping without failure |
| Operating Temperature | –65 °C to +175 °C - enables deployment in jet engine controllers and downhole tools |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" package (also designated D-5B); cathode indicated by band; end caps are copper with Sn/Pb finish; weight 539 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential rail; must sustain 1.5 V drop at 1 A forward current |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential rail to enable reverse-biased regulation |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination under 2000+ thermal cycles |
| Category III metallurgical bond | Validated per MIL-PRF-19500/356 for sustained operation in shock/vibration environments |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
| Inherent radiation hardness | Qualified to 100 krad(Si) total ionizing dose per MicroNote 050 |
| Tape-and-reel packaging | EIA-481-B compliant for automated SMT placement with zero misalignment risk |
Applications
| Aerospace Power Bus Regulation | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Stabilizing 28 VDC aircraft bus-derived supplies feeding flight control sensors. IC Role / Device Role / Timing Role: Zener diode providing shunt voltage reference and overvoltage clamp. Use Value: Maintains <±1.5% output deviation across –55 °C to +125 °C ambient with no derating up to 125 °C case temperature. |
Use Scenario: Generating stable bias for piezoelectric pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed 47 V reference for signal conditioning amplifiers. Use Value: Delivers <25 Ω dynamic impedance and <2 μA leakage at 35.8 V, minimizing sensor offset drift. |
| Radiation-Hardened Test Equipment | Military Radar Bias Supply |
Use Scenario: Calibrating gamma-ray spectrometers in nuclear facility monitoring systems. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference in front-end analog acquisition circuitry. Use Value: Retains Zener voltage within ±3% after 100 krad(Si) exposure per MicroNote 050. |
Use Scenario: Providing stable gate bias for GaN RF power amplifiers in ground-based radar transmitters. IC Role / Device Role / Timing Role: High-reliability shunt regulator protecting amplifier bias nodes from supply transients. Use Value: Withstands 5.5 A surge current (8.3 ms) without parametric shift, preventing false fault triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4974US | No "TR" suffix; bulk packaging instead of tape-and-reel; identical electrical specs and screening. | Preferred for manual prototyping or low-volume hand-soldered assemblies. | Select JANTXV1N4974US when automated pick-and-place is not required and MIL-PRF-19500/356 Class V screening is mandatory. |
| 1N4974US | Commercial-grade (non-military); lacks JAN/JANTXV screening, Category III bond, and radiation hardness validation. | Suitable only for non-critical industrial controls where TA ≤ 85 °C and radiation exposure is absent. | Choose 1N4974US only for cost-sensitive, non-mission-critical designs with full lifecycle traceability waived. |
Compared with JANTXV1N4974US and 1N4974US, the JANTXV1N4974DUS/TR provides guaranteed tape-and-reel delivery for SMT production, retains full MIL-PRF-19500/356 Class V qualification, and includes radiation hardness documentation-making it the sole option for flight-certified hardware requiring lot-level traceability and environmental resilience.
Availability
JANTXV1N4974DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus regulation, downhole instrumentation reference, and radiation-hardened test equipment requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4974DUS/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 defense, aerospace, and industrial markets.
The JANTXV1N4974DUS/TR belongs to Microsemi's military-qualified Zener diode product line, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance for JANTXV1N4974DUS/TR?
The JANTXV1N4974DUS/TR has a nominal Zener voltage of 47 V with a standard tolerance of ±5%, as specified in the SD44A datasheet. This tolerance applies at 25 °C and IZT = 25 mA, and is maintained across the full military temperature range due to its Category III metallurgical bond and voidless-glass construction.
Does JANTXV1N4974DUS/TR require external heatsinking?
JANTXV1N4974DUS/TR relies on end-cap conduction for thermal management, with a junction-to-end-cap thermal resistance of 10 °C/W. For continuous 5 W operation, PCB copper area under both end caps must provide sufficient thermal mass; no discrete heatsink is required if board layout follows Microsemi's D-5B pad recommendations and maintains TEC ≤ 125 °C.
Is JANTXV1N4974DUS/TR radiation hardened?
Yes, JANTXV1N4974DUS/TR is inherently radiation hard per Microsemi MicroNote 050, qualified to 100 krad(Si) total ionizing dose without functional degradation. This capability is intrinsic to its voidless-glass package and Category III bond structure-not an add-on feature-and is documented in the official SD44A revision E datasheet.
What does the "DUS/TR" suffix mean in JANTXV1N4974DUS/TR?
In JANTXV1N4974DUS/TR, "DUS" denotes the D-5B surface-mount package with voidless-glass hermetic seal and Category III bond, while "TR" indicates tape-and-reel packaging per EIA-481-B. The full suffix confirms compliance with MIL-PRF-19500/356 Class V screening and automated SMT readiness.
Can JANTXV1N4974DUS/TR replace 1N4974US in existing designs?
JANTXV1N4974DUS/TR shares identical electrical parameters and package outline with 1N4974US but adds military screening, radiation hardness, and traceable lot data. Replacement is electrically valid, but design requalification is required to leverage its enhanced reliability attributes-especially for applications subject to DO-160, MIL-STD-810, or MIL-STD-750 testing.
JANTXV1N4974DUS/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):
- 47 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 35.8 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
JANTXV1N4974DUS/TR FAQ
1.How can I place an order for JANTXV1N4974DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4974DUS/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 JANTXV1N4974DUS/TR reliable?
The price and inventory of JANTXV1N4974DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4974DUS/TR is usually 5 days.
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Once your JANTXV1N4974DUS/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 JANTXV1N4974DUS/TR?
For technical support, including JANTXV1N4974DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4974DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4974DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4974DUS/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 JANTXV1N4974DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4974DUS/TR?
All JANTXV1N4974DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4974DUS/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 JANTXV1N4974DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4974DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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