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Microchip Technology JANTX1N4956DUS/TR
- Part No.:
- JANTX1N4956DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4956DUS/TR.pdf
- Description:
- DIODE ZENER 8.2V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,236
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Product details
Overview
JANTX1N4956DUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 8.2 V, ±5% tolerance (no suffix), 150 mA maximum continuous Zener current (IZM), and 24 A surge current rating at 8.3 ms. It operates across –65 °C to +175 °C and is used for precision voltage regulation in radiation-hardened avionics power supplies.
For engineers reviewing the JANTX1N4956DUS/TR datasheet, JANTX1N4956DUS/TR pinout, JANTX1N4956DUS/TR application, or JANTX1N4956DUS/TR equivalent, this part serves as a high-reliability, voidless-glass Zener regulator where failure tolerance, thermal stability, and MIL-PRF-19500/356 compliance are mandatory design requirements.
Technical Context
This device functions as a two-terminal voltage reference operating in reverse breakdown, delivering stable regulation over wide current (10%–50% IZM) and temperature ranges. Its internal Category I metallurgical bond and triple-layer passivation ensure robustness against humidity, thermal cycling, and mechanical stress.
The 8.2 V nominal Zener voltage exhibits a temperature coefficient of ±0.06 %/°C and dynamic impedance of 1.5 Ω at 150 mA test current, enabling low-noise regulation in analog sensor biasing and reference circuits under transient load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal at 150 mA - sets regulated rail voltage with ±5% tolerance across production lot |
| Power Dissipation | 5 W @ TEC = 140 °C - requires heatsinking via end-cap thermal path in high-power designs |
| Dynamic Impedance (ZZ) | 1.5 Ω at IZT = 150 mA - ensures <15 mV output variation for ±15 mA load step changes |
| Max Reverse Leakage (IR) | 50 μA @ VR = 6.2 V - guarantees minimal quiescent current draw in battery-backed systems |
| Temp Coefficient (αVZ) | ±0.06 %/°C - supports stable operation across –65 °C to +175 °C without external compensation |
| Surge Current (IZSM) | 24 A @ 8.3 ms half-sine - withstands lightning-induced transients per MIL-STD-461 CS115 |
| Forward Voltage (VF) | 1.5 V @ 1.0 A - enables 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. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to system ground or lower-potential rail; forms cathode-to-anode voltage reference path |
| Cathode | Regulated output terminal | Delivers stable 8.2 V output when anode is grounded; marked by visible band on glass body |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion over 20+ year field life in sealed aerospace enclosures |
| Category I metallurgical bond | Ensures mechanical integrity under 20 g vibration and 1500 g shock per MIL-STD-883 Method 2007 |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Inherent radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - eliminates need for shielding in LEO satellite power rails |
| Triple-layer passivation | Blocks sodium ion migration and prevents parametric drift during 1000-hr 125 °C storage testing |
Applications
| Aerospace Power Conditioning | Defense Radar Bias Supply |
|---|---|
Use Scenario: Regulating +8.2 V reference for analog front-end amplifiers in phased-array radar receivers. IC Role / Device Role / Timing Role: Precision voltage reference for ADC driver stages and op-amp bias networks. Use Value: Maintains <±0.5% output stability across –55 °C to +125 °C ambient, ensuring consistent gain calibration. |
Use Scenario: Providing stable gate bias for GaN RF power amplifiers in EW jamming transmitters. IC Role / Device Role / Timing Role: Low-impedance Zener shunt regulator supplying fixed bias voltage independent of supply ripple. Use Value: 1.5 Ω dynamic impedance suppresses 100 kHz switching noise from DC-DC converters feeding RF stages. |
| Satellite Onboard Computer | Nuclear Instrumentation |
Use Scenario: Generating reference voltage for radiation-tolerant microcontroller reset circuitry in CubeSat platforms. IC Role / Device Role / Timing Role: Fail-safe voltage monitor element triggering brown-out reset at 7.8 V threshold. Use Value: Radiation-hardened construction ensures no single-event latchup or parametric shift after 100 krad exposure. |
Use Scenario: Stabilizing high-voltage detector bias in neutron flux monitoring systems deployed in reactor containment. IC Role / Device Role / Timing Role: Temperature-stable Zener reference for precision current-source generation in ionization chamber circuits. Use Value: ±0.06 %/°C tempco enables <0.3% full-scale error over 0–85 °C reactor coolant temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4956DUS/TR | Higher screening level: JANTXV per MIL-PRF-19500/356 - includes burn-in, 100% parametric test, and extended temperature life test. | Required for Class H (125 °C case) or mission-critical launch vehicle avionics where zero defects are mandated. | Select JANTXV1N4956DUS/TR when full MIL-PRF-19500/356 Class V screening is contractually required. |
| 1N4956US | Commercial-grade version - no JAN/JANTX qualification, no radiation hardness data, wider temp range only specified to +150 °C. | Suitable for non-military industrial controls or lab equipment where cost sensitivity outweighs reliability requirements. | Choose 1N4956US only for prototyping or non-certified subsystems with relaxed environmental and lifetime demands. |
Compared with JANTX1N4956DUS/TR, JANTXV1N4956DUS/TR adds burn-in and extended life testing for zero-defect assurance in launch-critical systems, while 1N4956US omits military screening and radiation validation - making it unsuitable for space or nuclear environments.
Availability
JANTX1N4956DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense radar bias supply, and satellite onboard computer applications requiring stable component supply with full traceability and long-term obsolescence management.
Supply support for JANTX1N4956DUS/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, radiation-hardened, and military-qualified analog and discrete components.
JANTX1N4956DUS/TR belongs to Microsemi's legacy 1N49xxUS series of hermetically sealed Zener regulators, designed specifically for fail-operational power systems in aerospace, defense, and nuclear instrumentation.
FAQ
What is the Zener voltage tolerance for JANTX1N4956DUS/TR?
JANTX1N4956DUS/TR has a nominal Zener voltage of 8.2 V with ±5% tolerance, as defined by the absence of a tolerance suffix (e.g., 'C' for ±2%, 'D' for ±1%). This tolerance applies across the full operating temperature range of –65 °C to +175 °C and is verified per MIL-PRF-19500/356 screening requirements. The JANTX1N4956DUS/TR datasheet specifies ΔVZ ≤ 0.7 V between 10% and 50% of IZM.
Does JANTX1N4956DUS/TR require derating above 140 °C case temperature?
Yes, JANTX1N4956DUS/TR must be derated linearly above 140 °C end-cap temperature (TEC) to zero power at 175 °C, per its 5 W rating specification. Derating slope is 7 °C/W junction-to-end-cap thermal resistance. This means usable power drops to ~3.5 W at 155 °C TEC. JANTX1N4956DUS/TR thermal performance is validated using MIL-STD-750 Method 1082.
Is JANTX1N4956DUS/TR compatible with lead-free solder reflow profiles?
JANTX1N4956DUS/TR features Sn/Pb-finished copper end caps and is qualified for tin-lead soldering only. Its glass-body construction and internal metallurgy are not rated for peak reflow temperatures ≥260 °C required by lead-free processes. Using JANTX1N4956DUS/TR with lead-free reflow may crack the hermetic seal or degrade bond integrity - Microsemi explicitly recommends Sn/Pb assembly per SD44A.pdf.
What is the maximum reverse leakage current for JANTX1N4956DUS/TR at 6.2 V?
JANTX1N4956DUS/TR exhibits a maximum reverse leakage current (IR) of 50 μA at VR = 6.2 V and TJ = 25 °C, as specified in the Electrical Characteristics table. This value remains ≤100 μA up to +125 °C ambient, supporting low-quiescent-current designs in battery-powered telemetry modules where JANTX1N4956DUS/TR serves as a standby voltage reference.
Can JANTX1N4956DUS/TR be used as a bidirectional transient suppressor?
No - JANTX1N4956DUS/TR is a unidirectional Zener diode optimized for reverse-bias regulation. While its forward voltage is 1.5 V at 1.0 A, it lacks symmetric clamping characteristics or specified avalanche energy handling in forward conduction. For bidirectional transient suppression, dedicated TVS arrays or back-to-back Zener configurations (e.g., two JANTX1N4956DUS/TR in series opposition) are required - JANTX1N4956DUS/TR itself is not rated for that function.
JANTX1N4956DUS/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):
- 8.2 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1.5 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 6.2 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
JANTX1N4956DUS/TR FAQ
1.How can I place an order for JANTX1N4956DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4956DUS/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 JANTX1N4956DUS/TR reliable?
The price and inventory of JANTX1N4956DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4956DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4956DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4956DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4956DUS/TR?
JANTX1N4956DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4956DUS/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 JANTX1N4956DUS/TR?
For technical support, including JANTX1N4956DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4956DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4956DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4956DUS/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 JANTX1N4956DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4956DUS/TR?
All JANTX1N4956DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4956DUS/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 JANTX1N4956DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4956DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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