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Microchip Technology JANTX1N4968DUS/TR
- Part No.:
- JANTX1N4968DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4968DUS/TR.pdf
- Description:
- DIODE ZENER 27V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,285
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Product details
Overview
JANTX1N4968DUS/TR from Microsemi is a military-qualified, voidless hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 27 V, ±2% tolerance (D suffix), and maximum dynamic impedance of 6.0 Ω at 50 mA test current. It operates from −65 °C to +175 °C and delivers stable voltage regulation in high-reliability power supply and reference circuits for aerospace and defense systems.
For engineers reviewing the JANTX1N4968DUS/TR datasheet, JANTX1N4968DUS/TR pinout, JANTX1N4968DUS/TR application, or JANTX1N4968DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, 5 W power rating at 140 °C end-cap temperature, 27 V ±2% regulation, and hermetic glass package with tungsten slugs and Sn/Pb terminations.
Technical Context
This device functions as a precision shunt voltage regulator in constant-voltage bias networks, operating in reverse breakdown with tightly controlled Zener voltage and low dynamic impedance. Its Category I metallurgical bond and triple-layer passivation ensure long-term stability under thermal cycling and radiation exposure.
The JANTX1N4968DUS/TR exhibits a temperature coefficient of +0.090 %/°C and maintains regulation across 10%–50% of IZM (6.0 A), with ΔVZ ≤ 1.0 V over that range. It supports surge currents up to 6.0 A (8.3 ms square wave) and has forward voltage ≤1.50 V at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal at 50 mA test current; ±2% tolerance ensures tight regulation in critical reference paths. |
| Power Dissipation | 5 W at TEC = 140 °C; derates linearly to zero at 175 °C - enables high-temperature board-level operation. |
| Dynamic Impedance (ZZ) | 6.0 Ω at IZT = 50 mA; low impedance minimizes output voltage variation under load transients. |
| Max Reverse Leakage (IR) | 2 μA at VR = 20.6 V; ultra-low leakage preserves accuracy in high-impedance bias networks. |
| Operating Temperature | −65 °C to +175 °C junction range; qualified for extended-range avionics, downhole, and space-qualified electronics. |
| Thermal Resistance | 7 °C/W junction-to-end-cap; enables efficient heat transfer through metallized end caps to PCB copper. |
| Surge Current (IZSM) | 6.0 A peak (8.3 ms square wave); withstands transient overvoltage events without degradation. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case (E package / D-5B outline) with copper end caps and Sn/Pb finish; cathode indicated by band; weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to system ground or lower-potential node; carries full load current during regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 27 V reference when reverse-biased; marked with band; connects to input supply via series resistor. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/356 Qualified (JANTX) | Meets military screening, testing, and traceability requirements for Class H reliability applications. |
| Voidless Hermetic Glass Construction | Eliminates internal delamination risk and moisture ingress - ensures >20-year shelf life and field reliability. |
| Category I Metallurgical Bond | Robust internal tungsten-copper interface prevents bond fatigue under thermal shock and vibration. |
| Triple-Layer Passivation | Protects glass surface against ionic contamination and surface leakage in humid or saline environments. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | No special handling required; compatible with standard SMT assembly lines without ESD mitigation. |
Applications
| Avionics Power Conditioning | Satellite Voltage Reference |
|---|---|
|
Use Scenario: Regulating auxiliary 28 V DC bus in flight control computers where voltage stability must be maintained across −55 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise 27 V reference for analog sensor signal conditioning and ADC biasing. Use Value: ±2% tolerance and +0.090 %/°C TC ensure <±0.5% total error over full temperature range without calibration. |
Use Scenario: Establishing stable bias for radiation-hardened op-amps and comparators in LEO satellite telemetry subsystems. IC Role / Device Role / Timing Role: Primary Zener reference in isolated DC/DC converter feedback loop and precision voltage monitor circuitry. Use Value: Hermetic seal and inherent radiation hardness per MicroNote 050 eliminate single-event latchup and parametric drift in orbit. |
| Tactical Radio RF Stage Bias | Downhole Instrumentation Supply |
|
Use Scenario: Providing stable gate bias for GaN RF power amplifiers in man-portable radios exposed to rapid thermal transients and mechanical shock. IC Role / Device Role / Timing Role: High-stability shunt regulator maintaining constant drain-source voltage for amplifier linearity and efficiency. Use Value: 6.0 Ω dynamic impedance and 5 W dissipation capability suppress ripple-induced distortion under pulsed RF loads. |
Use Scenario: Regulating sensor excitation voltage in oil/gas well logging tools operating continuously at 175 °C downhole temperatures. IC Role / Device Role / Timing Role: Primary voltage clamp protecting downstream ASICs from supply overvoltage during motor startup surges. Use Value: −65 °C to +175 °C operating range and 7 °C/W thermal resistance enable direct mounting on high-temp ceramic substrates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4968DUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot traceability and extended burn-in per MIL-PRF-19500/356. | Required for mission-critical launch vehicle avionics where failure probability must be <1×10−6. | Select JANTXV variant only when program specifications mandate enhanced screening beyond JANTX baseline. |
| 1N4968US (non-JAN) | Commercial-grade version; no MIL-PRF-19500 qualification; same electrical specs and package. | Suitable for industrial prototypes or non-safety-critical test equipment where cost sensitivity outweighs reliability assurance. | Use 1N4968US for early-stage development or cost-driven commercial designs not requiring military certification. |
Compared with JANTX1N4968DUS/TR, the JANTXV variant adds screening rigor without altering electrical behavior, while the 1N4968US removes qualification overhead but retains identical Zener performance and thermal characteristics.
Availability
JANTX1N4968DUS/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite voltage reference, and downhole instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANTX1N4968DUS/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 JANTX1N4968DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode family, engineered specifically for mission-critical voltage regulation where hermetic integrity, radiation tolerance, and extreme temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of JANTX1N4968DUS/TR?
The JANTX1N4968DUS/TR has a nominal Zener voltage of 27 V with ±2% tolerance, indicated by the "D" suffix per Microsemi's standard coding. This tolerance is verified at 25 °C and maintained across the full operating temperature range due to its +0.090 %/°C temperature coefficient. The JANTX1N4968DUS/TR achieves this precision using Category I metallurgical bonding and triple-layer passivation to minimize drift.
Is JANTX1N4968DUS/TR compatible with lead-free reflow processes?
No - JANTX1N4968DUS/TR features Sn/Pb (tin/lead) terminations and is not rated for lead-free reflow profiles. Its end caps are specified with Sn/Pb finish per the datasheet, and the glass package is not qualified for peak temperatures exceeding 235 °C. For lead-free assembly, consult Microchip's qualified alternatives or consider derating and process validation per MIL-STD-202 Method 210.
What is the maximum continuous Zener current for JANTX1N4968DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4968DUS/TR is 6.0 A, calculated from its 5 W power rating and 27 V nominal Zener voltage (P = V × I). This rating applies at TEC = 140 °C and derates linearly to zero at 175 °C. The JANTX1N4968DUS/TR sustains this current with 6.0 Ω dynamic impedance and <1.0 V regulation shift between 10% and 50% of IZM.
Does JANTX1N4968DUS/TR have radiation hardness certification?
Yes - JANTX1N4968DUS/TR is inherently radiation hard as documented in Microsemi MicroNote 050, with no parameter degradation observed under total ionizing dose (TID) up to 100 krad(Si) and immunity to single-event effects in typical space environments. Its voidless hermetic glass construction and Category I metallurgical bond contribute directly to this performance, making JANTX1N4968DUS/TR suitable for LEO and MEO satellite applications.
How is polarity identified on JANTX1N4968DUS/TR?
Polarity on JANTX1N4968DUS/TR is indicated by a visible cathode band on the glass body - the banded end is the cathode, and the unmarked end is the anode. This marking aligns with JEDEC-standard orientation for surface-mount Zener diodes and is confirmed in the "MECHANICAL AND PACKAGING" section of the SD44A datasheet. The JANTX1N4968DUS/TR uses this band for unambiguous placement in automated pick-and-place and manual inspection.
JANTX1N4968DUS/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):
- 27 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 20.6 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
JANTX1N4968DUS/TR FAQ
1.How can I place an order for JANTX1N4968DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4968DUS/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 JANTX1N4968DUS/TR reliable?
The price and inventory of JANTX1N4968DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4968DUS/TR is usually 5 days.
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JANTX1N4968DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4968DUS/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 JANTX1N4968DUS/TR?
For technical support, including JANTX1N4968DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4968DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4968DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4968DUS/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 JANTX1N4968DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4968DUS/TR?
All JANTX1N4968DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4968DUS/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 JANTX1N4968DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4968DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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