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Microchip Technology JANTXV1N4954DUS/TR
- Part No.:
- JANTXV1N4954DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4954DUS/TR.pdf
- Description:
- DIODE ZENER 6.8V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,065
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Product details
Overview
JANTXV1N4954DUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation, with nominal Zener voltage of 6.8 V at 175 mA test current, ±5% tolerance, and dynamic impedance of 1.0 Ω at IZT - used in precision voltage regulation for avionics power conditioning and radiation-hardened sensor biasing.
For engineers reviewing the JANTXV1N4954DUS/TR datasheet, JANTXV1N4954DUS/TR pinout, JANTXV1N4954DUS/TR application, or JANTXV1N4954DUS/TR equivalent, this part supports high-reliability design where failure tolerance, wide temperature operation (–65 °C to +175 °C), and ESD immunity per MIL-STD-750 Method 1020 are mandatory.
Technical Context
This device operates as a two-terminal voltage reference in reverse breakdown mode, with regulated output maintained across a broad current range (10% to 50% of IZM) and stable temperature coefficient of ±0.05%/°C. Its voidless-glass hermetic construction ensures long-term parameter stability under thermal cycling and humidity exposure.
The internal Category I metallurgical bond and triple-layer passivation provide robustness against mechanical stress and surface contamination. It delivers low dynamic impedance (1.0 Ω) at 175 mA, enabling tight regulation in low-noise analog supply rails and reference buffers for ADCs and DACs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 6.8 V at 175 mA - defines precise regulation point for 7 V-class supply rails |
| Power Dissipation (PZ) | 5 W @ TEC = 140 °C - enables high-current regulation without external heatsinking |
| Dynamic Impedance (ZZ) | 1.0 Ω at IZT - minimizes output voltage variation under load transients |
| Max Reverse Leakage (IR) | 150 μA at 4.28 V - ensures low quiescent current in standby-biased circuits |
| Temp Coefficient (αVZ) | ±0.05 %/°C - supports stable reference performance over –65 °C to +175 °C |
| Surge Current (IZSM) | 29.3 A @ 8.3 ms - withstands transient overvoltage events in MIL-STD-1275 systems |
| Forward Voltage (VF) | 1.50 V at 1.0 A - allows use as clamping diode in bidirectional protection schemes |
Pinout & Package
Hermetically sealed voidless glass package designated "E" (also known as "D-5B"), with copper end caps finished in Sn/Pb, cathode indicated by band, and polarity-aligned surface-mount footprint optimized for reflow soldering on rigid PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias / Reference ground node in reverse bias | Connected to system ground or low-impedance return path for stable regulation |
| Cathode | Regulated output node in reverse bias / Current source in forward bias | Delivers stable 6.8 V output when biased above breakdown; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and parameter drift over 20+ year field life in aerospace deployments |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration per MIL-STD-883 Method 2002 |
| Triple-layer passivation | Prevents surface leakage and parametric shift in high-humidity or salt-fog environments |
| Nonsensitive to ESD | Withstands >4 kV HBM without parameter shift - no external protection required |
| Radiation hardness | Qualified to 100 krad(Si) total ionizing dose per MicroNote 050 - suitable for LEO satellite payloads |
Applications
| Aerospace Power Bus Regulation | Avionics Sensor Bias Supply |
|---|---|
Use Scenario: Regulating unregulated 28 V DC bus in flight control computers to generate stable 6.8 V reference for analog front-ends. IC Role / Device Role / Timing Role: Two-terminal Zener voltage regulator providing primary DC reference. Use Value: Maintains ±0.5% output stability across –55 °C to +125 °C ambient and 10–200 mA load range. |
Use Scenario: Biasing piezoresistive pressure transducers in engine monitoring systems requiring ultra-stable excitation. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric sensor excitation. Use Value: Delivers <1.5 mV drift over 10-year mission life due to hermetic sealing and low αVZ. |
| Military Radio RF Stage Protection | Satellite Command Decoder Reference |
Use Scenario: Clamping RF amplifier gate bias during lightning-induced transients per MIL-STD-461G CS115. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in forward conduction and reverse Zener modes. Use Value: Absorbs 29.3 A surge at 8.3 ms without degradation - validated per MIL-PRF-19500/356 screening. |
Use Scenario: Providing tamper-resistant 6.8 V reference for cryptographic key generation circuitry in secure comms modules. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference ensuring deterministic logic thresholds. Use Value: Immune to single-event latchup and parametric shift up to 100 krad(Si) TID. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4954US | No tape-and-reel packaging; bulk or ammo pack only | Lacks TR suffix - unsuitable for automated SMT placement | Select JANTXV1N4954DUS/TR for high-volume pick-and-place assembly |
| 1N4954US (commercial grade) | Non-military screening; no JAN/JANTXV qualification; wider temp range (–65 °C to +150 °C) | Not qualified for MIL-PRF-19500/356 - excluded from Class H or Class K programs | Use only in non-safety-critical commercial industrial designs |
Compared with JANTXV1N4954US and 1N4954US, JANTXV1N4954DUS/TR uniquely combines tape-and-reel delivery, full JANTXV screening per MIL-PRF-19500/356, and extended +175 °C storage rating - making it the sole option for high-reliability SMT production requiring traceable, lot-controlled components.
Availability
JANTXV1N4954DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, avionics sensor biasing, and military radio protection requiring stable component supply, full traceability, and MIL-PRF-19500 compliance.
Supply support for JANTXV1N4954DUS/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.
JANTXV1N4954DUS/TR belongs to Microsemi's legacy military-qualified Zener diode family designed specifically for fail-safe voltage regulation in harsh-environment electronics where hermeticity, radiation tolerance, and extended temperature operation are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTXV1N4954DUS/TR?
JANTXV1N4954DUS/TR has a nominal Zener voltage of 6.8 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. This tolerance applies at 25 °C and 175 mA test current, and remains stable across the full operating temperature range due to its low temperature coefficient of ±0.05%/°C.
Is JANTXV1N4954DUS/TR suitable for space applications?
Yes, JANTXV1N4954DUS/TR is inherently radiation-hardened to 100 krad(Si) total ionizing dose per Microsemi MicroNote 050 and qualified per MIL-PRF-19500/356. Its voidless-glass hermetic package and Category I metallurgical bond make it suitable for LEO satellite command decoder references and payload sensor biasing.
What is the maximum continuous Zener current for JANTXV1N4954DUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4954DUS/TR is 700 mA, calculated from its 5 W power rating and 6.8 V nominal Zener voltage (P = V × I). This value assumes operation at TEC = 140 °C and linear derating to zero at +175 °C.
Does JANTXV1N4954DUS/TR require external ESD protection?
No, JANTXV1N4954DUS/TR is nonsensitive to ESD per MIL-STD-750 Method 1020 and does not require external protection. Its triple-layer passivation and hermetic construction prevent electrostatic damage during handling and assembly - verified across 100% of production lots.
What package outline does JANTXV1N4954DUS/TR use?
JANTXV1N4954DUS/TR uses the "E" package (also designated "D-5B"), a surface-mount voidless-glass outline with tungsten slugs and copper end caps finished in Sn/Pb. The cathode is marked by a visible band, and the device is supplied in EIA-481-B compliant tape-and-reel format.
JANTXV1N4954DUS/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):
- 6.8 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 150 µA @ 5.2 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
JANTXV1N4954DUS/TR FAQ
1.How can I place an order for JANTXV1N4954DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4954DUS/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 JANTXV1N4954DUS/TR reliable?
The price and inventory of JANTXV1N4954DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4954DUS/TR is usually 5 days.
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Once your JANTXV1N4954DUS/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 JANTXV1N4954DUS/TR?
For technical support, including JANTXV1N4954DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4954DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4954DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4954DUS/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 JANTXV1N4954DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4954DUS/TR?
All JANTXV1N4954DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4954DUS/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 JANTXV1N4954DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4954DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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