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Microchip Technology JANTXV1N4959DUS/TR
- Part No.:
- JANTXV1N4959DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4959DUS/TR.pdf
- Description:
- DIODE ZENER 11V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,625
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Product details
Overview
JANTXV1N4959DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with a nominal Zener voltage of 11 V at 125 mA test current, ±5% tolerance (no suffix), and maximum dynamic impedance of 2.5 Ω at IZT - used for precision voltage regulation in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4959DUS/TR datasheet, JANTXV1N4959DUS/TR pinout, JANTXV1N4959DUS/TR application, or JANTXV1N4959DUS/TR equivalent, this part delivers verified thermal stability across –65 °C to +175 °C, radiation-hardened construction per MicroNote 050, and MIL-PRF-19500/356 qualification - critical for avionics power rail clamping and reference stabilization.
Technical Context
This JANTXV1N4959DUS/TR belongs to the 1N4954US–1N4996US family and uses voidless hermetically sealed glass packaging with tungsten slugs and copper end caps (Sn/Pb finish). It features Category I internal metallurgical bonds and triple-layer passivation for enhanced reliability under thermal cycling and humidity stress.
It operates as a two-terminal voltage regulator with cathode indicated by band polarity, supports continuous Zener current up to 430 mA (IZM), and exhibits low temperature coefficient of ±0.07 %/°C at IZT - enabling stable regulation over wide ambient ranges without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V at 125 mA test current - defines precise regulation point for 12 V rail stabilization |
| Power Dissipation | 5 W @ TEC = 140 °C - enables high-power transient suppression without derating below 140 °C |
| Dynamic Impedance (ZZ) | 2.5 Ω at IZT - ensures minimal output voltage variation under load current changes |
| Max Reverse Leakage (IR) | 10 μA at 8.4 V - guarantees low quiescent current in standby power monitoring circuits |
| Temp Coefficient (αVZ) | ±0.07 %/°C - provides predictable drift behavior for temperature-critical references |
| Surge Current (IZSM) | 19 A @ 8.3 ms - withstands lightning-induced transients in aircraft DC bus protection |
| Operating Temperature | –65 °C to +175 °C - supports operation in engine bay, satellite payload, and missile guidance systems |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps (Sn/Pb finish), cathode identified by band, weight 539 mg, tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; grounded node in reverse-bias regulation | Connected to system ground or low-side reference point during Zener operation |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Provides stable 11 V reference when biased above breakdown; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination - extends MTBF in vacuum and high-humidity environments |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration >100 g - qualified for flight-critical subsystems |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands >8 kV HBM without parameter shift - simplifies handling in cleanroom assembly |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for LEO satellite power supervisors without shielding |
| Triple-layer passivation | Prevents surface conduction paths and leakage growth under ionizing dose exposure |
Applications
| Aerospace Power Bus Clamping | Avionics Reference Voltage Source |
|---|---|
Use Scenario: Protecting 28 V DC distribution bus against load dump transients in UAV flight control systems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator clamping excess voltage to prevent downstream converter damage. Use Value: Withstands 19 A surge for 8.3 ms and maintains regulation within ±5% across –65 °C to +175 °C - eliminates need for external TVS stacking. |
Use Scenario: Providing stable 11 V reference for analog-to-digital conversion in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Precision Zener reference element in ratiometric sensor excitation circuitry. Use Value: ±0.07 %/°C tempco and <2.5 Ω dynamic impedance ensure ADC accuracy remains within 0.1% FS over full operational temperature range. |
| Military Vehicle Onboard Charger Regulation | Satellite Payload Voltage Supervisor |
Use Scenario: Regulating auxiliary 12 V rail in armored vehicle battery management systems exposed to wide thermal swings. IC Role / Device Role / Timing Role: Primary shunt regulator maintaining stable bias for CAN transceivers and microcontroller reset logic. Use Value: Operates continuously from –65 °C to +175 °C without derating - avoids thermal shutdown events during desert or arctic deployment. |
Use Scenario: Monitoring primary power rail health in CubeSat solar array regulators. IC Role / Device Role / Timing Role: Radiation-hardened voltage threshold detector triggering fault-safe power sequencing. Use Value: Inherent TID tolerance per MicroNote 050 and 10 μA max IR at 8.4 V enable reliable supervision without periodic recalibration in orbit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4959US | No "D" suffix → ±5% tolerance (vs. JANTXV1N4959DUS/TR's ±1%); same package, power rating, and temp range | Acceptable where tighter regulation not required; lower cost for non-critical rails | Select JANTXV1N4959US only if ±5% VZ tolerance satisfies system margin requirements |
| 1N4959US | Commercial-grade (non-JANTXV); no MIL-PRF-19500/356 qualification; identical electrical specs and package | Not suitable for defense/aerospace programs requiring JAN/JANTXV traceability or radiation assurance | Choose 1N4959US only for industrial prototypes or non-certified subsystems with identical performance needs |
Compared with JANTXV1N4959US and 1N4959US, JANTXV1N4959DUS/TR provides ±1% voltage tolerance and full military qualification - essential for safety-critical voltage references where parameter drift must remain bounded under extreme environmental stress.
Availability
JANTXV1N4959DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus clamping, avionics reference voltage sources, and military vehicle onboard charger regulation requiring stable component supply, full traceability, and long-term obsolescence mitigation.
Supply support for JANTXV1N4959DUS/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.
JANTXV1N4959DUS/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 - emphasizing hermeticity, radiation tolerance, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of JANTXV1N4959DUS/TR?
JANTXV1N4959DUS/TR has a nominal Zener voltage of 11 V with ±1% tolerance, indicated by the "D" suffix per Microsemi's standard nomenclature. This tighter tolerance is confirmed in the Electrical Characteristics table on page 2 of SD44A.pdf, where 1N4959US variants with "D" suffix are specified at ±1%. The "DUS/TR" designation confirms surface-mount packaging and tape-and-reel delivery.
Is JANTXV1N4959DUS/TR qualified to MIL-PRF-19500/356?
Yes, JANTXV1N4959DUS/TR is explicitly qualified to MIL-PRF-19500/356 under the JANTXV screening level, as stated in the Features section of the SD44A.pdf datasheet. The "JANTXV" prefix denotes compliance with enhanced environmental and reliability testing including thermal shock, vibration, and burn-in - required for high-reliability defense and space applications.
What is the maximum continuous Zener current for JANTXV1N4959DUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4959DUS/TR is 430 mA, derived from the 5 W power rating and 11 V nominal Zener voltage (P = V × I → I = 5 W / 11 V ≈ 455 mA, rounded down to 430 mA per the published IZM value in the Electrical Characteristics table for 1N4959US series).
Does JANTXV1N4959DUS/TR have radiation hardness certification?
Yes, JANTXV1N4959DUS/TR exhibits inherent radiation hardness validated per Microsemi MicroNote 050, which documents total ionizing dose (TID) performance for this Zener family. The voidless glass construction and Category I metallurgical bond contribute to its resilience in radiation environments - making it suitable for LEO satellite power supervisors without additional shielding.
What package type is used for JANTXV1N4959DUS/TR?
JANTXV1N4959DUS/TR uses the "E" package (also designated D-5B), a hermetically sealed voidless glass surface-mount outline with tungsten slugs and copper end caps finished with Sn/Pb. This is confirmed in the Mechanical and Packaging section of SD44A.pdf and illustrated in the Package Dimensions drawing on page 4.
JANTXV1N4959DUS/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):
- 11 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 8.4 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
JANTXV1N4959DUS/TR FAQ
1.How can I place an order for JANTXV1N4959DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4959DUS/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 JANTXV1N4959DUS/TR reliable?
The price and inventory of JANTXV1N4959DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4959DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4959DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4959DUS/TR transactions.
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4.How is shipping managed for JANTXV1N4959DUS/TR?
JANTXV1N4959DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4959DUS/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 JANTXV1N4959DUS/TR?
For technical support, including JANTXV1N4959DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4959DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4959DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4959DUS/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 JANTXV1N4959DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4959DUS/TR?
All JANTXV1N4959DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4959DUS/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 JANTXV1N4959DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4959DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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