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Microchip Technology JANTXV1N4955DUS/TR
- Part No.:
- JANTXV1N4955DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4955DUS/TR.pdf
- Description:
- DIODE ZENER 7.5V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,193
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Product details
Overview
JANTXV1N4955DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 6.2 V ±5%, dynamic impedance of 1.0 Ω at 220 mA test current, and operating junction temperature range of –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4955DUS/TR datasheet, JANTXV1N4955DUS/TR pinout, JANTXV1N4955DUS/TR application, or JANTXV1N4955DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, voidless-glass hermetic construction, Category I metallurgical bond, –65 °C to +175 °C operation, and 5 W thermal derating profile.
Technical Context
This device operates in reverse breakdown mode with tightly controlled Zener voltage regulation across 10–50% of IZM (765 mA), exhibiting ΔVZ ≤ 0.04 V under that load variation. Its low dynamic impedance (1.0 Ω) and minimal temperature coefficient (+0.04%/°C) enable stable reference performance in wide-temperature environments.
The "D-5B" (E) package uses tungsten slugs and copper end caps with Sn/Pb finish, delivering 7 °C/W junction-to-end-cap thermal resistance and 1.8 °C/W thermal impedance at 10 ms. It is nonsensitive to ESD per MIL-STD-750 Method 1020 and inherently radiation-hardened per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.2 V ±5% at IZT = 220 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 5 W @ TEC = 140 °C - maximum continuous power before thermal derating begins |
| Dynamic Impedance ZZT | 1.0 Ω @ IZT = 220 mA - ensures minimal output voltage shift under load transients |
| Max Reverse Leakage IR | 1000 μA @ VR = 4.74 V - guarantees low quiescent current in standby clamping |
| Operating Temperature | –65 °C to +175 °C - supports deployment in extreme-environment avionics and space systems |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - enables direct thermal path to PCB copper or heatsink |
| Surge Current IZSM | 20 A @ 8.3 ms - withstands transient overvoltage events without degradation |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with tungsten slugs and copper end caps finished in Sn/Pb. Cathode indicated by band. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during normal Zener operation; carries full surge current in forward bias |
| Cathode | Reverse breakdown terminal | Marked with band; connected to higher-potential node; establishes regulated voltage at cathode relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring long-term parameter stability in vacuum or humid environments |
| Category I metallurgical bond | Provides mechanical integrity and thermal continuity between silicon die and tungsten slug under thermal cycling stress |
| Triple-layer passivation | Protects junction surface from contamination and surface leakage paths during high-humidity or ionizing radiation exposure |
| Nonsensitive to ESD | Withstands >8 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Radiation hardness | Qualified per Microsemi MicroNote 050 for total ionizing dose (TID) tolerance in space-grade applications |
Applications
| Aerospace Power Bus Clamp | Avionics Voltage Reference |
|---|---|
Use Scenario: Clamping transient spikes on 28 V DC aircraft power bus during load dump or lightning-induced surges. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy into ground plane. Use Value: Withstands 20 A 8.3 ms surge and maintains <0.04 V regulation shift across –65 °C to +175 °C, preventing downstream regulator latch-up. |
Use Scenario: Providing stable 6.2 V reference for analog-to-digital converters in flight control sensor interfaces. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance and tight tempco. Use Value: 1.0 Ω ZZT and +0.04%/°C αVZ ensure <±1.5 mV drift over full temperature range, meeting DO-254 Class A accuracy requirements. |
| Satellite Power Conditioning | Military Radar Bias Supply |
Use Scenario: Regulating auxiliary bias rails in LEO satellite power management units exposed to total ionizing dose. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference for DC-DC converter feedback networks. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating, reducing SWaP-C in constrained payloads. |
Use Scenario: Stabilizing gate drive voltage for GaN RF power amplifiers in ground-based radar transmitters. IC Role / Device Role / Timing Role: Low-impedance voltage clamp protecting amplifier bias circuitry from switching noise. Use Value: 7 °C/W thermal resistance and 5 W rating allow direct mounting to aluminum chassis, enabling passive thermal management without fans. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4955US | No TR suffix; bulk packaging instead of tape-and-reel; identical electrical specs and hermetic construction | Preferred for manual prototyping or low-volume hand-soldered assemblies where reel handling is unnecessary | Select JANTXV1N4955US when automated pick-and-place is not required and cost-per-unit optimization is prioritized |
| JANS1N4955DUS/TR | Higher screening level (JANS vs JANTXV); includes additional burn-in and lot acceptance testing per MIL-PRF-19500/356 | Required for mission-critical spaceflight hardware where zero-defect reliability is mandated | Choose JANS1N4955DUS/TR only when full JANS qualification and extended test data packages are contractually required |
Compared with JANTXV1N4955US and JANS1N4955DUS/TR, the JANTXV1N4955DUS/TR delivers optimal balance of automated assembly readiness, MIL-qualified reliability, and cost efficiency for high-integrity defense electronics production.
Availability
JANTXV1N4955DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus clamping, avionics voltage reference, and satellite power conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4955DUS/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with deep expertise in radiation-hardened and hermetic devices.
The JANTXV1N4955DUS/TR belongs to Microsemi's military-qualified Zener diode family built for extreme-environment voltage regulation, emphasizing hermeticity, thermal robustness, and MIL-PRF-19500 compliance.
FAQ
What is the Zener voltage tolerance for JANTXV1N4955DUS/TR?
The JANTXV1N4955DUS/TR has a nominal Zener voltage of 6.2 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. This tolerance applies at 220 mA test current and 25 °C ambient. No tighter tolerance suffix (e.g., "C" for ±2% or "D" for ±1%) is present in the part number, confirming the ±5% grade.
Does JANTXV1N4955DUS/TR require derating above 140 °C?
Yes, JANTXV1N4955DUS/TR must be derated linearly above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. Its 5 W rating is valid only at TEC = 140 °C; for example, at 155 °C TEC, maximum allowable power drops to 2.5 W. Thermal design must account for this slope using the stated 7 °C/W junction-to-end-cap resistance.
Is JANTXV1N4955DUS/TR compatible with lead-free soldering processes?
JANTXV1N4955DUS/TR features Sn/Pb-finished copper end caps and is qualified for traditional eutectic solder reflow. While it can survive peak temperatures up to 260 °C for short durations, Microsemi does not certify it for Pb-free assembly per JEDEC J-STD-020. For RoHS-compliant builds, consult Microchip's obsolescence notice and consider approved alternatives.
What is the surge current rating of JANTXV1N4955DUS/TR?
JANTXV1N4955DUS/TR is rated for a nonrepetitive peak Zener surge current (IZSM) of 20 A at an 8.3 ms half-sine waveform, as confirmed in the SD44A datasheet. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure, supporting use in MIL-STD-1275 and DO-160 lightning protection circuits.
How is polarity marked on JANTXV1N4955DUS/TR?
JANTXV1N4955DUS/TR uses a cathode band to indicate polarity - the banded end is the cathode, which must be connected to the higher-potential node during Zener operation. The unmarked end is the anode. This marking is visible on the voidless glass body and aligns with JEDEC-standard orientation for surface-mount Zeners in the "E" package.
JANTXV1N4955DUS/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):
- 7.5 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 5.7 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
JANTXV1N4955DUS/TR FAQ
1.How can I place an order for JANTXV1N4955DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4955DUS/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 JANTXV1N4955DUS/TR reliable?
The price and inventory of JANTXV1N4955DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4955DUS/TR is usually 5 days.
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Once your JANTXV1N4955DUS/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 JANTXV1N4955DUS/TR?
For technical support, including JANTXV1N4955DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4955DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4955DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4955DUS/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 JANTXV1N4955DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4955DUS/TR?
All JANTXV1N4955DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4955DUS/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 JANTXV1N4955DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4955DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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