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Microchip Technology JANTX1N4958DUS/TR
- Part No.:
- JANTX1N4958DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4958DUS/TR.pdf
- Description:
- DIODE ZENER 10V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:6,061
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Product details
Overview
JANTX1N4958DUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 10.0 V ±1% (D suffix), dynamic impedance of 2.0 Ω at 125 mA test current, and operating junction temperature range of −65 °C to +175 °C. It serves as a precision voltage reference and regulation element in high-reliability power supply and protection circuits.
For engineers reviewing the JANTX1N4958DUS/TR datasheet, JANTX1N4958DUS/TR pinout, JANTX1N4958DUS/TR application, or JANTX1N4958DUS/TR equivalent, this part is selected for aerospace, defense, and downhole instrumentation where radiation hardness, ESD immunity, and long-term parametric stability under thermal cycling are mandatory.
Technical Context
This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US series, featuring voidless hermetic glass construction with internal Category I metallurgical bonds and triple-layer passivation. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of maximum Zener current (IZM = 475 mA) with ΔVZ ≤ 0.76 V.
It exhibits low thermal resistance (7 °C/W junction-to-end-cap), nonsensitive ESD performance per MIL-STD-750 Method 1020, and inherent radiation hardness documented in MicroNote 050. The D suffix confirms ±1% Zener voltage tolerance at 25 °C, validated at IZT = 125 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.0 V ±1% at IZT = 125 mA - enables precise voltage clamping in regulated supplies with minimal calibration drift. |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in high-temperature avionics enclosures without forced cooling. |
| Dynamic Impedance (ZZ) | 2.0 Ω @ IZT = 125 mA - ensures tight output regulation under load transients in feedback reference paths. |
| Max Reverse Leakage (IR) | 25 μA @ VR = 7.6 V - guarantees low quiescent current draw in battery-backed hold-up circuits. |
| Junction Temp Range | −65 °C to +175 °C - validated for operation in space-grade thermal vacuum and oilfield downhole environments. |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows accurate thermal modeling when mounted on copper pads with thermal vias. |
| Surge Current (IZSM) | 20 A @ 8.3 ms - withstands lightning-induced transients in MIL-STD-461-compliant front-end protection stages. |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" package / "D-5B"), with copper end caps finished in Sn/Pb, cathode indicated by band, weight 539 mg, tape-and-reel compliant with EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries full surge current during clamping. |
| Cathode | Zener breakdown terminal | Marked with band; connected to regulated output node; defines reference potential in shunt regulator topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination over 20+ year field life in humid or corrosive atmospheres. |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle reliability >1000 cycles between −65 °C and +175 °C. |
| Triple-layer passivation | Prevents surface leakage and parameter shift under high-humidity bias-stress conditions (85 °C/85% RH). |
| Nonsensitive to ESD | Withstands ≥4 kV HBM without parameter degradation - eliminates need for external ESD protection in board layout. |
| Inherent radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for low-earth orbit satellite power subsystems. |
Applications
| Aerospace Power Conditioning | Downhole Instrumentation Reference |
|---|---|
Use Scenario: Regulating auxiliary rail in satellite DC-DC converter feedback loop under thermal vacuum and radiation exposure. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 10.0 V setpoint for error amplifier input. Use Value: ±1% tolerance and <0.1%/°C tempco ensure <±20 mV output deviation across −55 °C to +125 °C operational range. |
Use Scenario: Precision biasing of pressure sensor bridge in oil/gas well logging tool operating at 175 °C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit sigma-delta ADC front-end. Use Value: Stable 10.0 V output with <2.0 Ω dynamic impedance maintains SNR >110 dB despite supply ripple up to 100 mVpp. |
| Military Radar Bias Supply | Nuclear Plant Control Interface |
Use Scenario: Clamping transient spikes on GaN RF amplifier gate bias rail during pulsed operation. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting gate voltage to safe 10.0 V ceiling. Use Value: 20 A 8.3 ms surge rating absorbs radar pulse-induced energy without degradation or parametric shift. |
Use Scenario: Isolated analog input protection in safety-critical reactor monitoring system with 40-year service life. IC Role / Device Role / Timing Role: Fail-safe voltage clamp preventing overvoltage damage to isolated ADC inputs. Use Value: Hermetic glass construction and MIL-PRF-19500 qualification guarantee zero failure-in-time (FIT) rate over full lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4958DUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356. | Required for Class S (spaceflight) applications; not needed for ground-based military systems. | Select JANTXV variant only when mission assurance requires extended burn-in and radiation lot acceptance testing. |
| 1N4958US (commercial grade) | No MIL-PRF-19500 qualification; wider temp range (−65 °C to +150 °C); same electrical specs at 25 °C. | Suitable for industrial controls but excluded from defense/aerospace BOMs requiring traceable screening. | Use 1N4958US only in non-military programs where cost sensitivity outweighs long-term reliability requirements. |
Compared with JANTX1N4958DUS/TR, the JANTXV variant adds radiation lot acceptance and extended environmental stress screening at higher cost, while the commercial 1N4958US omits military screening entirely-making JANTX1N4958DUS/TR the optimal balance of assured reliability and procurement accessibility for Tier 1 defense contractors.
Availability
JANTX1N4958DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation reference, and military radar bias supply requiring stable component supply with full traceability and long-lifecycle support.
Supply support for JANTX1N4958DUS/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 hermetically sealed components.
JANTX1N4958DUS/TR belongs to Microsemi's MIL-PRF-19500/356-qualified Zener diode family, engineered specifically for voltage regulation and transient suppression in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTX1N4958DUS/TR?
JANTX1N4958DUS/TR has a Zener voltage tolerance of ±1% at 25 °C, confirmed by the "D" suffix per Microsemi's SD44A datasheet. This tolerance is measured at IZT = 125 mA and remains stable across its full operating temperature range due to low temperature coefficient (±0.07%/°C). The JANTX1N4958DUS/TR achieves this via tight process control and post-screening verification.
Is JANTX1N4958DUS/TR suitable for space applications?
JANTX1N4958DUS/TR is radiation-hardened per MicroNote 050 and qualified to MIL-PRF-19500/356, making it suitable for low-earth orbit missions. However, for Class S spaceflight use, the JANTXV1N4958DUS/TR variant-with additional radiation lot acceptance testing-is required. JANTX1N4958DUS/TR itself is approved for airborne and ground-based defense platforms.
What is the maximum continuous Zener current for JANTX1N4958DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4958DUS/TR is 475 mA at TEC = 140 °C, derived from its 5 W power rating and 10.0 V nominal Zener voltage. Derating is linear above 140 °C, reaching zero at 175 °C. This value is verified per the SD44A datasheet's Maximum Ratings table and applies only when mounted per recommended pad layout.
Does JANTX1N4958DUS/TR require external ESD protection?
No, JANTX1N4958DUS/TR does not require external ESD protection. It is explicitly characterized as nonsensitive to ESD per MIL-STD-750 Method 1020, with demonstrated immunity to ≥4 kV HBM. This eliminates the need for TVS diodes or RC filters in most interface circuits, simplifying layout and reducing BOM count for JANTX1N4958DUS/TR implementations.
What package type is used for JANTX1N4958DUS/TR?
JANTX1N4958DUS/TR uses the "E" package (also designated "D-5B"), a hermetically sealed voidless glass surface-mount case with tungsten slugs and copper end caps finished in Sn/Pb. Its dimensions and pad layout are standardized per Microsemi's SD44A datasheet, and it complies with EIA-481-B tape-and-reel packaging for automated assembly.
JANTX1N4958DUS/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):
- 10 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 7.6 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
JANTX1N4958DUS/TR FAQ
1.How can I place an order for JANTX1N4958DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4958DUS/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 JANTX1N4958DUS/TR reliable?
The price and inventory of JANTX1N4958DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4958DUS/TR is usually 5 days.
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JANTX1N4958DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4958DUS/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 JANTX1N4958DUS/TR?
For technical support, including JANTX1N4958DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4958DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4958DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4958DUS/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 JANTX1N4958DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4958DUS/TR?
All JANTX1N4958DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4958DUS/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 JANTX1N4958DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4958DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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