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Microchip Technology JANTXV1N4977CUS/TR
- Part No.:
- JANTXV1N4977CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4977CUS/TR.pdf
- Description:
- DIODE ZENER 62V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,846
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Product details
Overview
JANTXV1N4977CUS/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 62 V at 20 mA test current, ±2% tolerance (C suffix), and maximum dynamic impedance of 42 Ω at IZT. It operates across –65 °C to +175 °C and is used in high-reliability voltage regulation circuits for aerospace power conditioning and radiation-hardened instrumentation.
For engineers reviewing the JANTXV1N4977CUS/TR datasheet, JANTXV1N4977CUS/TR pinout, JANTXV1N4977CUS/TR application, or JANTXV1N4977CUS/TR equivalent, key selection criteria include its voidless-glass hermetic package, Category I metallurgical bond, MIL-PRF-19500/356 qualification, and stable regulation under wide temperature and current variation.
Technical Context
This device functions as a precision shunt voltage regulator in feedback loops and overvoltage protection circuits. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of IZM (2.5–12.5 mA), with voltage change ΔVZ ≤ 5.0 V and temperature coefficient αVZ = +0.100 %/°C at IZT.
The "E" package (D-5B) uses tungsten slugs and copper end caps with Sn/Pb finish, enabling direct solder attachment without adhesive. Thermal resistance is 7 °C/W junction-to-end-cap, supporting 5 W operation up to 140 °C case temperature before linear derating to zero at 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±2% at 20 mA - defines precise regulation setpoint for reference and clamp circuits |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained high-power regulation in compact SMT layouts |
| Dynamic Impedance (ZZ) | 42 Ω @ IZT - ensures low output impedance and minimal voltage shift under load transients |
| Max Reverse Leakage (IR) | 2 μA @ VR = 47.1 V - guarantees negligible standby current in high-impedance bias networks |
| Temp Coefficient (αVZ) | +0.100 %/°C @ IZT - enables predictable drift compensation in wide-temperature environments |
| Surge Current (IZSM) | 2.5 A @ 8.3 ms - withstands transient overvoltage events without degradation |
| Operating Temperature | –65 °C to +175 °C - qualified for extreme-environment deployment in avionics and downhole tools |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (JEDEC D-5B), with cathode indicated by band. End caps are copper with Sn/Pb finish; no marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal in reverse-bias regulation mode | Connected to lower-potential node; forms shunt path during overvoltage |
| Cathode | Regulated output reference node | Banded end; connected to regulated rail or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass construction | Eliminates internal delamination risk and moisture ingress, ensuring >20-year reliability in sealed enclosures |
| Category I metallurgical bond | Provides mechanical integrity under thermal cycling and vibration per MIL-STD-883 Method 2002 |
| JANTXV screening level | Includes burn-in, temperature cycling, and parametric testing to MIL-PRF-19500/356 requirements |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050; no additional shielding required |
Applications
| Aerospace Power Bus Regulation | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Stabilizing 28 V DC bus in satellite power distribution units under thermal vacuum and radiation exposure. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining reference stability despite solar array fluctuations and battery discharge cycles. Use Value: Maintains <±0.5% output deviation over –55 °C to +125 °C ambient due to low αVZ and hermetic seal integrity. |
Use Scenario: Providing precision bias voltage for pressure transducers in oil/gas well logging tools operating at 175 °C. IC Role / Device Role / Timing Role: High-temperature Zener reference enabling analog front-end calibration without external trimming. Use Value: Delivers stable 62 V reference with <2 μA leakage at 150 °C, reducing sensor offset drift by 40% vs. plastic-packaged alternatives. |
| Military Radar Bias Supply | Radiation-Hardened Test Equipment |
Use Scenario: Generating fixed bias for GaN RF power amplifier stages in ground-based radar transmitters. IC Role / Device Role / Timing Role: Overvoltage clamp protecting gate drivers during fast switching transients. Use Value: Absorbs 2.5 A surge current at 8.3 ms without parameter shift, preventing latch-up in adjacent ICs. |
Use Scenario: Serving as primary voltage standard in portable nuclear detection calibrators deployed in field-deployed labs. IC Role / Device Role / Timing Role: Primary shunt reference in metrology-grade voltage divider networks. Use Value: Enables traceable ±2% regulation accuracy across 10–1000-hour mission durations without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4977US/TR | Same 62 V rating but ±5% tolerance (no suffix); higher ZZ = 50 Ω; identical package and screening | Acceptable where tighter regulation not required; lower cost for non-critical biasing | Select JANTXV1N4977US/TR when ±5% tolerance suffices and cost optimization is prioritized |
| 1N4977US | Commercial-grade version; no JANTXV screening; same electrical specs and D-5B package | Limited to non-military, non-safety-critical systems; not qualified for space or flight hardware | Choose 1N4977US only for lab prototypes or industrial controls where MIL-spec is unnecessary |
Compared with JANTXV1N4977CUS/TR, JANTXV1N4977US/TR trades ±2% tolerance and 42 Ω impedance for broader tolerance and relaxed performance, while 1N4977US omits military screening entirely-making JANTXV1N4977CUS/TR the sole choice for flight-critical voltage references requiring guaranteed long-term stability and radiation resilience.
Availability
JANTXV1N4977CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation, and military radar bias supply requiring stable component supply across extended temperature ranges and radiation environments.
Supply support for JANTXV1N4977CUS/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 emphasis on radiation-hardened and high-temperature operation.
The JANTXV1N4977CUS/TR belongs to Microsemi's military-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTXV1N4977CUS/TR?
JANTXV1N4977CUS/TR has a nominal Zener voltage of 62 V with ±2% tolerance, indicated by the "C" suffix per Microsemi's standard coding. This tight tolerance ensures consistent regulation across production lots and temperature extremes, critical for precision reference applications in avionics and test equipment.
Is JANTXV1N4977CUS/TR qualified to MIL-PRF-19500/356?
Yes, JANTXV1N4977CUS/TR is fully qualified to MIL-PRF-19500/356 at the JANTXV level, including extended burn-in, temperature cycling, and parametric testing. This qualification confirms its suitability for high-reliability military and aerospace deployments where component failure is unacceptable.
What is the maximum continuous Zener current for JANTXV1N4977CUS/TR?
The maximum continuous Zener current (IZM) for JANTXV1N4977CUS/TR is 930 mA, calculated from its 5 W power rating and 62 V Zener voltage (P = V × I). This value assumes operation at TEC = 140 °C; current must be linearly derated above that temperature to zero at 175 °C.
Does JANTXV1N4977CUS/TR have radiation hardness documentation?
Yes, JANTXV1N4977CUS/TR exhibits inherent radiation hardness as described in Microsemi MicroNote 050. Its voidless-glass hermetic construction and silicon process provide tolerance to total ionizing dose (TID), making it suitable for space and nuclear instrumentation without supplemental shielding.
What package type does JANTXV1N4977CUS/TR use?
JANTXV1N4977CUS/TR uses the "E" package (also known as JEDEC D-5B), a surface-mount hermetically sealed voidless glass package with tungsten slugs and copper end caps finished with Sn/Pb. Cathode polarity is marked by a visible band on the glass body.
JANTXV1N4977CUS/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):
- 62 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 42 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 47.1 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
JANTXV1N4977CUS/TR FAQ
1.How can I place an order for JANTXV1N4977CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4977CUS/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 JANTXV1N4977CUS/TR reliable?
The price and inventory of JANTXV1N4977CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4977CUS/TR is usually 5 days.
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JANTXV1N4977CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4977CUS/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 JANTXV1N4977CUS/TR?
For technical support, including JANTXV1N4977CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4977CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4977CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4977CUS/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 JANTXV1N4977CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4977CUS/TR?
All JANTXV1N4977CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4977CUS/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 JANTXV1N4977CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4977CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4977CUS/TR Tags
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