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Microchip Technology JANTX1N4959DUS/TR
- Part No.:
- JANTX1N4959DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4959DUS/TR.pdf
- Description:
- DIODE ZENER 11V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,773
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Product details
Overview
JANTX1N4959DUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount 5 W Zener diode with nominal Zener voltage of 11 V, ±1% tolerance (D suffix), and 125 mA maximum continuous Zener 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 JANTX1N4959DUS/TR datasheet, JANTX1N4959DUS/TR pinout, JANTX1N4959DUS/TR application, or JANTX1N4959DUS/TR equivalent, this part supports precision voltage clamping, overvoltage protection, and low-drift reference generation where radiation hardness, ESD immunity, and long-term parametric stability are required.
Technical Context
This device belongs to the MIL-PRF-19500/356–qualified 1N4954US–1N4996US series. It uses voidless-glass hermetic construction with internal Category I metallurgical bonds and triple-layer passivation to ensure reliability under extreme thermal cycling and radiation exposure.
It regulates voltage across a broad operating current range (10% to 50% of IZM) with ΔVZ ≤ 0.8 V and exhibits low dynamic impedance (ZZ = 2.5 Ω @ IZT = 125 mA), enabling tight regulation even under varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 11 V at 125 mA test current - defines precise regulation point for reference and clamp circuits |
| Zener Tolerance | ±1% (D suffix) - enables high-accuracy voltage references without external trimming |
| Power Dissipation | 5 W @ TEC = 125 °C - supports robust thermal performance in compact SMT layouts |
| Dynamic Impedance (ZZ) | 2.5 Ω @ IZT - ensures minimal output voltage variation under dynamic load changes |
| Max Reverse Leakage (IR) | 10 μA @ VR = 8.4 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | –65 °C to +175 °C - validated for extended-range operation in avionics and downhole electronics |
| Thermal Resistance (RθJ-EC) | 7 °C/W junction-to-end-cap - enables accurate thermal modeling for board-level reliability analysis |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), 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 | Connected to lower-potential node in reverse-biased Zener configuration; carries full surge current during transient events |
| Cathode | Zener breakdown terminal | Marked with band; connected to regulated output node; sustains stable 11 V reference under specified IZT and temperature extremes |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk-critical for 20+ year field life in sealed modules |
| Category I metallurgical bond | Validated interfacial integrity per MIL-PRF-19500/356-ensures mechanical reliability under shock/vibration |
| Triple-layer passivation | Prevents surface leakage and ion migration-maintains IR spec over lifetime at 175 °C |
| Radiation hardness | Inherently qualified per MicroNote 050-no degradation in total ionizing dose (TID) up to 100 krad(Si) |
| ESD immunity | Qualified to MIL-STD-750 Method 1020-survives ≥4 kV HBM without parameter shift |
Applications
| Aerospace Power Conditioning | Defense System Reference |
|---|---|
Use Scenario: Regulating auxiliary rail in satellite power distribution units exposed to thermal vacuum and radiation. IC Role / Device Role / Timing Role: Zener diode providing primary 11 V reference for ADC biasing and LDO feedback networks. Use Value: Maintains ±1% regulation across –65 °C to +125 °C ambient with <2.5 Ω dynamic impedance-enabling 12-bit measurement accuracy. |
Use Scenario: Voltage clamping in radar receiver front-end protection circuits operating in high-EMI environments. IC Role / Device Role / Timing Role: Transient suppressor limiting input voltage to 11.11 V during ESD and lightning-induced surges. Use Value: Withstands 19 A non-repetitive 8.3 ms surge current and exhibits <10 μA leakage at 8.4 V-minimizing false triggering. |
| Downhole Instrumentation | Avionics Sensor Biasing |
Use Scenario: Providing stable bias voltage for MEMS pressure transducers in oil/gas well logging tools at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature Zener reference replacing less reliable IC-based solutions. Use Value: Operates continuously at +175 °C junction temperature with no derating below 5 W-enabling single-component solution. |
Use Scenario: Generating precision 11 V reference for inertial measurement unit (IMU) analog signal chains. IC Role / Device Role / Timing Role: Low-drift voltage reference source for gyroscope and accelerometer signal conditioning. Use Value: ±1% initial tolerance and <0.07 %/°C tempco enable sub-0.5% total error over –55 °C to +85 °C operational 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 |
|---|---|---|---|
| JANTXV1N4959DUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 | Required for Class H (spaceflight) and critical flight-safety systems | Select when mission-critical reliability validation beyond standard JANTX is mandated |
| 1N4959US | Commercial-grade version; no MIL-qualified screening; same electrical specs and package | Suitable for non-military industrial prototypes or cost-sensitive test fixtures | Choose only for bench validation-lacks radiation hardness documentation and ESD qualification |
Compared with JANTX1N4959DUS/TR, JANTXV1N4959DUS/TR adds enhanced screening for space-grade use but shares identical Zener voltage, thermal resistance, and package; 1N4959US offers identical form-fit-function at lower cost but omits military qualification evidence and radiation assurance.
Availability
JANTX1N4959DUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference, and downhole instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for JANTX1N4959DUS/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 JANTX1N4959DUS/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 JANTX1N4959DUS/TR?
JANTX1N4959DUS/TR has a nominal Zener voltage of 11 V with ±1% 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 of –65 °C to +175 °C, making JANTX1N4959DUS/TR suitable for precision reference applications where calibration drift must be minimized.
Does JANTX1N4959DUS/TR meet MIL-PRF-19500/356 requirements?
Yes, JANTX1N4959DUS/TR is fully qualified to MIL-PRF-19500/356 as a JAN-class device. It undergoes rigorous screening including temperature cycling, burn-in, and parametric testing per the specification, and features voidless-glass hermetic sealing with Category I metallurgical bonds-key requirements for JANTX-level military acceptance.
What is the maximum surge current rating for JANTX1N4959DUS/TR?
JANTX1N4959DUS/TR supports a non-repetitive peak Zener surge current (IZSM) of 19 A for an 8.3 ms square-wave pulse, as specified in the Microsemi SD44A datasheet. This rating enables JANTX1N4959DUS/TR to absorb transient energy in protection circuits without degradation, provided surge duty cycle remains within derating limits.
Is JANTX1N4959DUS/TR radiation-hardened?
Yes, JANTX1N4959DUS/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050. It exhibits no functional degradation or parametric shift up to 100 krad(Si) total ionizing dose, a key attribute confirmed for JANTX1N4959DUS/TR and shared across the 1N4954US–1N4996US series.
What package type does JANTX1N4959DUS/TR use?
JANTX1N4959DUS/TR uses the hermetically sealed "E" package (also known as D-5B), featuring voidless hard glass construction with tungsten slugs and copper end caps finished with Sn/Pb. The cathode is marked by a visible band, and the device is supplied in EIA-481-B–compliant tape-and-reel format.
JANTX1N4959DUS/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):
- 11 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 8.4 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
JANTX1N4959DUS/TR FAQ
1.How can I place an order for JANTX1N4959DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4959DUS/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 JANTX1N4959DUS/TR reliable?
The price and inventory of JANTX1N4959DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4959DUS/TR is usually 5 days.
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5.How can I obtain technical support or documentation for JANTX1N4959DUS/TR?
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6.How does Aetrix verify that JANTX1N4959DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4959DUS/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 JANTX1N4959DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4959DUS/TR?
All JANTX1N4959DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4959DUS/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 JANTX1N4959DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4959DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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