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Microchip Technology JANTXV1N4976US/TR
- Part No.:
- JANTXV1N4976US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4976US/TR.pdf
- Description:
- DIODE ZENER 56V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,312
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Product details
Overview
JANTXV1N4976US/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 56 V, ±5% tolerance, 35 mA test current (IZT), and 320 Ω dynamic impedance at IZT. It operates from –65 °C to +175 °C and is qualified to MIL-PRF-19500/356 for high-reliability voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4976US/TR datasheet, JANTXV1N4976US/TR pinout, JANTXV1N4976US/TR application, or JANTXV1N4976US/TR equivalent, this part delivers military-grade thermal stability, radiation hardness, and surge robustness in a compact E-package - critical for avionics power rail clamping, reference stabilization, and overvoltage protection where failure is not an option.
Technical Context
This Zener diode functions as a precision shunt voltage regulator in reverse-biased breakdown mode, maintaining stable output voltage across wide operating current (10–50% of IZM) and temperature ranges. Its voidless-glass construction and Category III metallurgical bond ensure mechanical integrity under thermal cycling and mechanical shock.
It exhibits low temperature coefficient (±0.095 %/°C), low leakage (<2 µA at VR = 42.6 V), and high surge capability (2.8 A @ 8.3 ms). The device 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) | 56 V ±5% at 35 mA - defines regulated rail voltage with tight production control for mission-critical references. |
| Power Dissipation | 5 W @ TEC = 125 °C - supports continuous operation in high-temperature avionics enclosures without derating below 125 °C. |
| Dynamic Impedance (ZZ) | 320 Ω at IZT - ensures minimal output voltage variation under load transients in feedback-sensing applications. |
| Max Reverse Leakage | 2 µA at 42.6 V - guarantees negligible standby current draw in low-power hold-up and bias networks. |
| Temp Coefficient (αVZ) | ±0.095 %/°C - enables stable regulation across –65 °C to +175 °C without external compensation. |
| Surge Current (IZSM) | 2.8 A (8.3 ms half-sine) - withstands lightning-induced transients and inductive switch-off spikes in flight control systems. |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - allows use as polarity-protected rectifier in dual-role clamp-and-bias configurations. |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with copper end caps, Sn/Pb finish, cathode band marking, and 539 mg mass. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias; reference node in reverse bias | Connected to system ground or lower-potential rail to enable shunt regulation and transient clamping. |
| Cathode | Current source in reverse breakdown; voltage reference node | Connected to regulated rail; band-marked end provides unambiguous orientation during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion over 20+ year service life in sealed avionics modules. |
| Category III metallurgical bond | Ensures mechanical reliability under 2000 g shock and 20 g vibration per MIL-STD-883, Method 2007. |
| Nonsensitive to ESD | Withstands >4 kV HBM without parameter shift - eliminates need for external ESD protection in board layout. |
| Radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for low-earth orbit satellite power subsystems. |
| Triple-layer passivation | Reduces surface leakage and improves long-term parameter stability in high-humidity environments. |
Applications
| Avionics Power Rail Clamping | Satellite Voltage Reference |
|---|---|
|
Use Scenario: Protecting 28 V DC distribution bus against load dump and inductive kickback in aircraft electrical systems. IC Role / Device Role / Timing Role: Shunt clamping device placed between bus and chassis ground to limit transient overvoltage to <60 V. Use Value: JANTXV1N4976US/TR's 2.8 A surge rating and –65 °C to +175 °C operation ensure reliable clamping across all flight envelopes without derating. |
Use Scenario: Providing stable 56 V reference for ADC biasing and telemetry calibration in LEO satellite payloads. IC Role / Device Role / Timing Role: Precision shunt reference supplying low-drift excitation to sensor front-ends and DAC feedback loops. Use Value: JANTXV1N4976US/TR's ±0.095 %/°C tempco and radiation hardness maintain reference accuracy over orbital thermal cycles and radiation exposure. |
| Missile Guidance Bias Network | Ground Vehicle ECU Protection |
|
Use Scenario: Stabilizing bias voltages for gyroscope and accelerometer signal conditioning in tactical missile guidance units. IC Role / Device Role / Timing Role: Low-leakage (2 µA) Zener reference establishing precise common-mode voltage for differential amplifiers. Use Value: JANTXV1N4976US/TR's 2 µA max IR at 42.6 V prevents loading errors in high-impedance sensor interfaces under extreme temperature cycling. |
Use Scenario: Overvoltage suppression on 24 V CAN bus power lines in armored vehicle electronic control units. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping line-to-ground surges exceeding ISO 7637-2 Pulse 1/2/5a thresholds. Use Value: JANTXV1N4976US/TR's voidless-glass construction and MIL-qualified reliability meet DO-160 Section 22 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4975US/TR | 51 V nominal Zener voltage, 270 Ω ZZ, same package and qualification level | Used where 51 V rail stabilization is required instead of 56 V; identical thermal and surge specs | Select when system design targets 51 V reference or clamping threshold. |
| JANTXV1N4977US/TR | 62 V nominal Zener voltage, 400 Ω ZZ, same package and qualification level | Used for higher-voltage bus protection (e.g., 48 V telecom or 60 V hybrid vehicle systems) | Select when 62 V regulation or clamping is needed; verify thermal margin due to higher VZ × IZM product. |
Compared with JANTXV1N4975US/TR and JANTXV1N4977US/TR, the JANTXV1N4976US/TR provides optimal voltage headroom for 28 V avionics bus clamping while maintaining lowest ZZ among adjacent 56–62 V variants - improving transient response in fast-switching power converters.
Availability
JANTXV1N4976US/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite reference design, and missile guidance bias networks requiring stable component supply under extended temperature and radiation exposure conditions.
Supply support for JANTXV1N4976US/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 aerospace, defense, and industrial markets.
The JANTXV1N4976US/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener series, designed specifically for voltage regulation and transient suppression in safety-critical systems where long-term parametric stability and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance and test current for JANTXV1N4976US/TR?
JANTXV1N4976US/TR has a nominal Zener voltage of 56 V with ±5% tolerance, measured at a test current (IZT) of 35 mA. This tolerance reflects the standard military-grade specification for the part, and no suffix letter (e.g., 'C' or 'D') is present in the part number, confirming the 5% band. The 35 mA IZT ensures stable regulation within its specified power envelope and thermal limits.
Is JANTXV1N4976US/TR suitable for space applications?
Yes, JANTXV1N4976US/TR is inherently radiation-hardened per Microsemi MicroNote 050 and qualified to MIL-PRF-19500/356, making it suitable for low-earth orbit (LEO) satellite applications. Its voidless-glass hermetic seal, Category III metallurgical bond, and TID tolerance up to 100 krad(Si) support long-duration missions where single-event effects and total ionizing dose must be mitigated without shielding overhead.
What is the maximum operating temperature and thermal resistance of JANTXV1N4976US/TR?
JANTXV1N4976US/TR operates from –65 °C to +175 °C junction temperature. Its thermal resistance is 10 °C/W junction-to-end-cap, based on its classification in the 1N4954US–1N4996US family. This value applies at TEC = 125 °C for full 5 W dissipation, with linear derating to zero at 175 °C - enabling use in high-temperature engine bay or avionics bay environments.
Does JANTXV1N4976US/TR have ESD protection built-in?
JANTXV1N4976US/TR is nonsensitive to ESD per MIL-STD-750 Method 1020, meaning it withstands human-body-model (HBM) discharges ≥4 kV without parameter shift or functional degradation. No external ESD protection circuitry is required during handling or PCB assembly, simplifying layout and reducing BOM count in high-reliability designs.
How does the dynamic impedance of JANTXV1N4976US/TR affect regulation performance?
JANTXV1N4976US/TR has a dynamic impedance (ZZ) of 320 Ω at 35 mA, which directly determines how much the output voltage varies under changing load current. A lower ZZ yields tighter regulation - this value is among the lowest in the 56–62 V segment of the series, enabling sub-10 mV drift over 10–50% IZM current range, critical for precision reference and feedback applications.
JANTXV1N4976US/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):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 42.6 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
JANTXV1N4976US/TR FAQ
1.How can I place an order for JANTXV1N4976US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4976US/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 JANTXV1N4976US/TR reliable?
The price and inventory of JANTXV1N4976US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4976US/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4976US/TR?
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4.How is shipping managed for JANTXV1N4976US/TR?
JANTXV1N4976US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4976US/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 JANTXV1N4976US/TR?
For technical support, including JANTXV1N4976US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4976US/TR requirements.
6.How does Aetrix verify that JANTXV1N4976US/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4976US/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 JANTXV1N4976US/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4976US/TR?
All JANTXV1N4976US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4976US/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 JANTXV1N4976US/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4976US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4976US/TR Tags
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