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Microchip Technology JANTX1N4971DUS/TR
- Part No.:
- JANTX1N4971DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4971DUS/TR.pdf
- Description:
- DIODE ZENER 36V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,557
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Product details
Overview
JANTX1N4971DUS/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 36 V, ±5% tolerance (D suffix), and maximum dynamic impedance of 220 Ω at 40 mA test current. It operates from –65 °C to +175 °C and delivers stable voltage regulation in high-reliability military power conditioning circuits.
For engineers reviewing the JANTX1N4971DUS/TR datasheet, JANTX1N4971DUS/TR pinout, JANTX1N4971DUS/TR application, or JANTX1N4971DUS/TR equivalent, this part is selected for aerospace power rail clamping, radiation-hardened reference design, and high-temperature analog stabilization where hermetic integrity and MIL-PRF-19500/356 qualification are mandatory.
Technical Context
This device belongs to the JANTX-grade 1N49xxUS series, qualified per MIL-PRF-19500/356 with Category I internal metallurgical bonds and triple-layer passivation. Its voidless hard-glass construction ensures zero internal delamination under thermal cycling and mechanical shock.
It exhibits a temperature coefficient of +0.095 %/°C at 40 mA, reverse leakage ≤2 µA at 27.4 V, and forward voltage ≤1.5 V at 1.0 A - enabling predictable regulation across wide junction temperatures without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% at 40 mA - defines precise clamping threshold for 28 V DC system overvoltage protection |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in conduction-cooled avionics enclosures |
| Dynamic Impedance (ZZ) | 220 Ω max at IZT = 40 mA - ensures <1.5 V regulation shift across 10–50% IZM load range |
| Max Reverse Leakage (IR) | 2 µA at 27.4 V - guarantees negligible standby current in battery-backed systems |
| Operating Temperature | –65 °C to +175 °C - enables deployment in turbine-mounted sensors and space-grade power supplies |
| Thermal Resistance (RθJC) | 7 °C/W junction-to-end-cap - allows direct thermal path to chassis without heatsink in low-airflow zones |
| Surge Current (IZSM) | 5.0 A @ 8.3 ms - withstands lightning-induced transients per MIL-STD-461 CS115 |
Pinout & Package
Package: Hermetically sealed voidless hard-glass "E" package (also designated D-5B), with 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 | Current sink in reverse bias | Connected to lower-potential rail; forms regulated output node with cathode |
| Cathode | Current source in reverse bias | Marked with band; tied to unregulated input; establishes fixed reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal microcracks - certified for 100,000-hour MTBF in vacuum environments |
| Category I metallurgical bond | Prevents interfacial delamination during thermal shock (–65 °C ↔ +175 °C, 5-min dwell) |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - no handling precautions required |
| Radiation hardness | Qualified to 100 krad(Si) total ionizing dose per MicroNote 050 - suitable for LEO satellite power rails |
| Triple-layer passivation | Blocks sodium ion migration and surface contamination - maintains Zener voltage stability after 1000-hr HTOL |
Applications
| Aerospace Power Bus Clamping | High-Temperature Sensor Reference |
|---|---|
Use Scenario: Protection of 28 V DC aircraft bus against load dump transients exceeding 100 V. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as shunt regulator and transient voltage suppressor. Use Value: 5 W dissipation and 5.0 A surge rating clamp spikes within 100 ns while maintaining <±0.5 V regulation error at 40 mA. |
Use Scenario: Stable voltage reference for pressure transducers mounted on jet engine casings (>150 °C ambient). IC Role / Device Role / Timing Role: Precision Zener element providing temperature-stable bias point for analog front-end amplifiers. Use Value: +0.095 %/°C tempco and –65 °C to +175 °C operation enable <1.2% reference drift across full engine thermal cycle. |
| Radiation-Hardened Instrumentation | Military Grade Power Supply Regulation |
Use Scenario: Voltage reference in satellite telemetry modules exposed to proton fluence >1×1012 p/cm2. IC Role / Device Role / Timing Role: Radiation-tolerant Zener regulator supplying bias to ADC drivers and clock buffers. Use Value: Inherent TID hardness to 100 krad(Si) eliminates need for shielding or derating - validated per MicroNote 050. |
Use Scenario: Output voltage stabilization in ground vehicle DC-DC converters subjected to MIL-STD-1275B voltage surges. IC Role / Device Role / Timing Role: Primary shunt regulator in feedback loop of isolated flyback converter. Use Value: 220 Ω dynamic impedance ensures <0.8% line regulation error across 10–100% load, even at 140 °C case temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4971DUS/TR | Higher screening grade (JANTXV per MIL-PRF-19500/356); tighter parametric limits and 100% lot testing | Required for Class H (spaceflight) and critical flight control subsystems | Select when full burn-in, radiation lot acceptance testing, and enhanced screening documentation are mandated |
| 1N4971US | Commercial-grade version; no MIL-spec screening, wider tempco (+0.095 to +0.105 %/°C), no radiation data | Suitable only for non-mission-critical industrial controls below 125 °C ambient | Choose only for cost-sensitive ground-based prototypes where MIL-PRF-19500 compliance is not required |
Compared with JANTX1N4971DUS/TR, JANTXV1N4971DUS/TR adds guaranteed single-event burnout immunity and extended life testing, while 1N4971US omits hermeticity validation and temperature cycling certification - making JANTX1N4971DUS/TR the minimum qualified part for deployed defense electronics.
Availability
JANTX1N4971DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus clamping, high-temperature sensor reference, and radiation-hardened instrumentation requiring stable component supply across extended product lifecycles.
Supply support for JANTX1N4971DUS/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.
The JANTX1N4971DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356-qualified Zener diode family, engineered specifically for mission-critical voltage regulation in extreme thermal, radiation, and mechanical stress environments.
FAQ
What is the Zener voltage tolerance for JANTX1N4971DUS/TR?
JANTX1N4971DUS/TR has a nominal Zener voltage of 36 V with ±5% tolerance, indicated by the "D" suffix per Microsemi's standard coding. This means the actual measured VZ at 40 mA falls between 34.2 V and 37.8 V across all units at 25 °C, verified per MIL-PRF-19500/356 screening.
Is JANTX1N4971DUS/TR compatible with lead-free soldering processes?
JANTX1N4971DUS/TR features Sn/Pb-finished copper end caps and is rated for wave and reflow soldering per MIL-STD-202 Method 210. While not lead-free, its Sn/Pb termination is compatible with standard Pb-based assembly lines; conversion to lead-free requires redesign per Microsemi's obsolescence notice SD44A Rev E.
Does JANTX1N4971DUS/TR require derating above 140 °C case temperature?
Yes - JANTX1N4971DUS/TR must be linearly derated from 5 W at TEC = 140 °C to 0 W at 175 °C. For example, at 160 °C case temperature, maximum allowable power is 3.33 W. This derating is defined in the Absolute Maximum Ratings table and applies regardless of airflow or heatsinking.
What is the cathode marking convention for JANTX1N4971DUS/TR?
JANTX1N4971DUS/TR uses a visible band on the glass body to indicate the cathode terminal. The band aligns with the cathode end cap, which connects to the higher-potential side of the circuit during Zener operation. No laser marking or alphanumeric code is applied per Microsemi's "MARKING: None" specification.
Can JANTX1N4971DUS/TR be used in parallel for higher power handling?
No - JANTX1N4971DUS/TR is not designed for parallel operation due to mismatched Zener voltage tolerances and dynamic impedances. Even with binning, thermal runaway risk remains high. For >5 W requirements, use a single higher-power Zener or discrete transistor-based shunt regulator per Microsemi Application Note AN-44.
JANTX1N4971DUS/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):
- 36 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 27.4 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
JANTX1N4971DUS/TR FAQ
1.How can I place an order for JANTX1N4971DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4971DUS/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 JANTX1N4971DUS/TR reliable?
The price and inventory of JANTX1N4971DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4971DUS/TR is usually 5 days.
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Once your JANTX1N4971DUS/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 JANTX1N4971DUS/TR?
For technical support, including JANTX1N4971DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4971DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4971DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4971DUS/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 JANTX1N4971DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4971DUS/TR?
All JANTX1N4971DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4971DUS/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 JANTX1N4971DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4971DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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