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Microchip Technology JANTXV1N4959CUS/TR
- Part No.:
- JANTXV1N4959CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4959CUS/TR.pdf
- Description:
- DIODE ZENER 11V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,637
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Product details
Overview
JANTXV1N4959CUS/TR from Microsemi is a military-grade, voidless-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, ±1% tolerance (C suffix), and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and regulation element in high-reliability power supply rails and analog signal conditioning circuits.
For engineers reviewing the JANTXV1N4959CUS/TR datasheet, JANTXV1N4959CUS/TR pinout, JANTXV1N4959CUS/TR application, or JANTXV1N4959CUS/TR equivalent, key selection criteria include its hermetic glass package, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and compliance with MIL-PRF-19500/356 Class V screening.
Technical Context
This device operates in reverse breakdown mode with tightly controlled dynamic impedance (2.5 Ω at 125 mA) and low voltage regulation drift (ΔVZ ≤ 0.8 V between 10% and 50% of IZM). Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable regulation under sustained 5 W dissipation at end-cap temperature ≤140 °C.
The JANTXV1N4959CUS/TR features triple-layer passivation, nonsensitivity to ESD per MIL-STD-750 Method 1020, and cathode polarity indicated by a band. It uses tungsten slugs and copper end caps with Sn/Pb finish in the "E" (D-5B) surface-mount package, optimized for high-temperature and radiation-intensive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11 V ±1% at IZT = 125 mA - enables precise 11 V reference generation with minimal calibration overhead |
| Power Dissipation | 5 W @ TEC = 140 °C - supports robust overvoltage clamping in compact, high-temp PCB layouts |
| Dynamic Impedance ZZ | 2.5 Ω at IZT - ensures low output impedance for stable regulation under load transients |
| Max Reverse Leakage | 10 μA at VR = 8.4 V - guarantees minimal quiescent current draw in battery-backed systems |
| Temp Coefficient αVZ | ±0.07 %/°C - provides predictable voltage drift across –65 °C to +175 °C operational range |
| Surge Current IZSM | 19 A (8.3 ms square wave) - withstands transient overvoltage events without degradation |
| Forward Voltage VF | 1.5 V at 1.0 A - allows use as a low-drop rectifier or clamp in dual-polarity protection schemes |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (JEDEC D-5B), surface-mount, with copper end caps and Sn/Pb finish. Cathode identified by band. Weight: 539 mg. Tape & reel compliant with EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side rail in Zener regulation | Provides low-resistance path for forward conduction; must be routed with adequate thermal relief for 1.5 V @ 1 A |
| Cathode | Current exit terminal in reverse breakdown; connected to regulated node or input rail | Carries full Zener current during regulation; band-marked end cap requires unobstructed solder mask clearance |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year reliability in vacuum and space environments |
| Category I metallurgical bond | Guarantees mechanical integrity and thermal cycling survivability from –65 °C to +175 °C without delamination |
| Triple-layer passivation | Prevents surface leakage and ion contamination, critical for low-noise analog references and rad-hard applications |
| MIL-PRF-19500/356 JANTXV screening | Includes burn-in, temperature cycling, and lot acceptance testing to meet Level V reliability requirements |
| Radiation hardness | Characterized per Microsemi MicroNote 050 for TID tolerance up to 100 krad(Si), suitable for LEO missions |
Applications
| Aerospace Power Conditioning | Defense Avionics Reference |
|---|---|
Use Scenario: Regulating auxiliary 11 V rail in satellite power distribution units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Primary Zener shunt regulator providing stable 11 V reference for ADCs and op-amps. Use Value: Maintains ±1% output accuracy over –65 °C to +175 °C and survives 100 krad(Si) total ionizing dose without parameter shift. |
Use Scenario: Precision voltage reference in radar receiver front-end bias networks requiring long-term stability. IC Role / Device Role / Timing Role: Low-drift 11 V reference source for RF amplifier biasing and mixer LO injection. Use Value: Delivers <2.5 Ω dynamic impedance and ±0.07 %/°C tempco to minimize gain drift across mission temperature profiles. |
| Industrial High-Temp Control | Nuclear Instrumentation |
Use Scenario: Overvoltage protection and reference in downhole drilling electronics operating continuously at 150 °C ambient. IC Role / Device Role / Timing Role: Shunt regulator and transient suppressor on 12 V sensor interface bus. Use Value: Sustains 5 W dissipation at TEC = 140 °C with 7 °C/W thermal resistance, eliminating need for external heatsinking. |
Use Scenario: Stable biasing element in gamma spectroscopy detector front-end amplifiers within reactor containment zones. IC Role / Device Role / Timing Role: Radiation-tolerant Zener reference for charge-sensitive preamplifier feedback networks. Use Value: Validated radiation hardness and zero parametric shift after 100 krad(Si) exposure ensure measurement integrity over system lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4959US | Same 11 V rating and package, but ±5% tolerance (no C suffix); higher max leakage (25 μA @ 8.4 V) | Suitable for non-critical biasing where tighter regulation not required | Select JANTXV1N4959US only when ±5% tolerance and relaxed leakage specs meet design margins |
| 1N4959US | Commercial-grade version; no MIL-PRF-19500 screening, no radiation characterization, wider temp range (–65 °C to +150 °C) | Applicable in industrial controls with lower reliability and radiation requirements | Choose 1N4959US for cost-sensitive terrestrial applications where JANTXV-level screening is unnecessary |
Compared with JANTXV1N4959US and 1N4959US, the JANTXV1N4959CUS/TR delivers superior voltage accuracy (±1% vs. ±5% or unspecified), lower leakage, and verified radiation hardness-making it the sole choice for flight-critical and nuclear-grade designs requiring guaranteed performance under extreme stress.
Availability
JANTXV1N4959CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense avionics reference, and industrial high-temperature control requiring stable component supply across extended product lifecycles.
Supply support for JANTXV1N4959CUS/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, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The JANTXV1N4959CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode family, engineered specifically for mission-critical voltage regulation where failure is not an option-including spaceflight, nuclear instrumentation, and tactical avionics.
FAQ
What is the Zener voltage tolerance of JANTXV1N4959CUS/TR?
The JANTXV1N4959CUS/TR has a nominal Zener voltage of 11 V with ±1% tolerance, denoted by the "C" suffix in the part number. This tight tolerance is achieved through post-screening binning and validated per MIL-PRF-19500/356 Level V testing. The JANTXV1N4959CUS/TR maintains this specification across its full operating temperature range of –65 °C to +175 °C.
Does JANTXV1N4959CUS/TR require derating above 140 °C end-cap temperature?
Yes. The JANTXV1N4959CUS/TR is rated for 5 W power dissipation only at end-cap temperature (TEC) ≤140 °C. Above that, power must be linearly derated to zero at 175 °C, yielding a derating slope of 143 mW/°C. This constraint is defined in the Absolute Maximum Ratings table and applies regardless of ambient or board layout conditions.
Is JANTXV1N4959CUS/TR compatible with lead-free reflow processes?
No. The JANTXV1N4959CUS/TR features copper end caps with Sn/Pb (tin/lead) finish, and its qualification data assumes eutectic solder reflow profiles. Lead-free reflow exceeds its thermal limits and risks compromising the hermetic seal or metallurgical bond. Use only with Sn63/Pb37 or equivalent Pb-containing solder per Microsemi SD44A specification.
What is the maximum surge current rating for JANTXV1N4959CUS/TR?
The JANTXV1N4959CUS/TR supports a nonrepetitive peak Zener surge current (IZSM) of 19 A for an 8.3 ms square-wave pulse, as specified in the Electrical Characteristics table. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure, provided the surge occurs within the device's safe operating area defined by junction temperature limits.
How is polarity marked on JANTXV1N4959CUS/TR?
The cathode of the JANTXV1N4959CUS/TR is marked by a visible band on the glass body, aligned with the cathode end cap. This band must be oriented toward the higher-potential node (e.g., input rail or regulated output) in standard Zener shunt configuration. The anode end cap is unmarked and connects to ground or return path.
JANTXV1N4959CUS/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:
- ±2%
- 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
JANTXV1N4959CUS/TR FAQ
1.How can I place an order for JANTXV1N4959CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4959CUS/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 JANTXV1N4959CUS/TR reliable?
The price and inventory of JANTXV1N4959CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4959CUS/TR is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4959CUS/TR transactions.
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JANTXV1N4959CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4959CUS/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 JANTXV1N4959CUS/TR?
For technical support, including JANTXV1N4959CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4959CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4959CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4959CUS/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 JANTXV1N4959CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4959CUS/TR?
All JANTXV1N4959CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4959CUS/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 JANTXV1N4959CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4959CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4959CUS/TR Tags
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