My Inquiry
My Account
Microchip Technology JANTX1N4962DUS/TR
- Part No.:
- JANTX1N4962DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4962DUS/TR.pdf
- Description:
- DIODE ZENER 15V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:7,588
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANTX1N4962DUS/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 15 V ±5%, dynamic impedance of 3.5 Ω at 75 mA test current, and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4962DUS/TR datasheet, JANTX1N4962DUS/TR pinout, JANTX1N4962DUS/TR application, or JANTX1N4962DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, voidless-glass hermetic construction, Category I metallurgical bond, and compatibility with tape-and-reel automated assembly for mission-critical embedded systems.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators, designed for high-reliability applications where failure is unacceptable. It uses a tungsten-slug glass package with copper end caps and Sn/Pb termination, enabling stable operation across extreme thermal cycling and radiation environments.
The JANTX1N4962DUS/TR exhibits a Zener voltage temperature coefficient of +0.08 %/°C at 75 mA, reverse leakage current ≤5 μA at 11.4 V, and surge current rating of 12 A (8.3 ms square wave), supporting robust transient suppression in avionics DC bus protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 15 V ±5% at 75 mA - defines regulated output voltage under nominal bias; tolerance impacts reference accuracy in feedback loops. |
| Power Dissipation | 5 W @ TEC = 140 °C - maximum steady-state power handling before thermal derating begins; critical for heatsink design. |
| Dynamic Impedance ZZ | 3.5 Ω @ IZT = 75 mA - low AC impedance ensures minimal output voltage variation under load transients. |
| Max Reverse Leakage IR | 5 μA @ VR = 11.4 V - low leakage preserves efficiency in high-impedance bias networks and low-power standby modes. |
| Operating Temperature | –65 °C to +175 °C - enables deployment in unheated satellite bays and engine-mounted control units without derating. |
| Surge Current IZSM | 12 A (8.3 ms) - withstands lightning-induced transients and inductive switch-off spikes in MIL-STD-461-compliant systems. |
| Thermal Resistance | 7 °C/W junction-to-end-cap - determines temperature rise per watt; guides PCB copper area and thermal pad layout. |
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 regulator current during clamping. |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node; establishes regulated voltage reference point at cathode-to-anode drop. |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year parametric stability in vacuum and high-humidity environments. |
| Category I metallurgical bond | Provides mechanical integrity and thermal continuity between silicon die and tungsten slug, minimizing interfacial delamination under shock/vibration. |
| MIL-PRF-19500/356 qualification | Validates compliance with screening, testing, and traceability requirements for Class S (space-level) and Class B (military) applications. |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - reduces handling risk during manual assembly and field repair. |
| Inherent radiation hardness | Specified per MicroNote 050 - maintains Zener voltage and leakage performance after total ionizing dose exposure up to 100 krad(Si). |
Applications
| Avionics Power Bus Protection | Satellite Onboard Computer Reference |
|---|---|
Use Scenario: Clamping 28 V DC bus transients induced by motor commutation and relay switching in flight control electronics. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp voltage excursions above 15 V threshold. Use Value: Prevents latch-up and gate oxide damage in downstream FPGAs and ADCs by limiting peak bus voltage to 16.7 V (15 V × 1.11 tolerance + margin). |
Use Scenario: Providing stable 15 V reference for analog sensor signal conditioning in low-power satellite subsystems. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC voltage dividers and op-amp bias networks. Use Value: Enables <±0.5% system-level voltage measurement accuracy over –40 °C to +85 °C due to tight 5% initial tolerance and low 0.08%/°C TC. |
| Missile Guidance System Biasing | Ground-Based Radar RF Amplifier Bias |
Use Scenario: Establishing fixed bias points for GaAs FET amplifiers in seeker front-end receivers exposed to wide thermal swings. IC Role / Device Role / Timing Role: Zener-based current source for active bias network stabilization. Use Value: Maintains amplifier quiescent current within ±3% over –55 °C to +125 °C, preserving gain flatness and noise figure across operational envelope. |
Use Scenario: Regulating gate voltage for high-power LDMOS RF transistors in pulsed radar transmitters subject to thermal cycling. IC Role / Device Role / Timing Role: Voltage regulator in discrete bias supply chain feeding RF power stage. Use Value: Delivers 15 V ±0.75 V regulation across 10–100 mA load range, preventing thermal runaway during duty-cycle transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4962DUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot acceptance testing per MIL-PRF-19500/356 Table I. | Required for Class S spaceflight hardware; not needed for ground-test or non-flight qualification programs. | Select JANTXV variant only when radiation assurance documentation and extended life test data are mandated. |
| 1N4962US | Commercial-grade version; no MIL-PRF-19500/356 qualification; same electrical specs and package. | Suitable for prototyping, industrial controls, or cost-sensitive non-military systems where reliability margins are relaxed. | Use 1N4962US for early-stage development or commercial derivatives where military screening adds unnecessary cost and lead time. |
Compared with JANTX1N4962DUS/TR, the JANTXV variant adds radiation assurance and enhanced screening for space use, while the 1N4962US removes military qualification entirely-enabling trade-offs between assured reliability, documentation burden, and unit cost.
Availability
JANTX1N4962DUS/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite reference design, and missile guidance biasing requiring stable component supply across extended product lifecycles and obsolescence-sensitive programs.
Supply support for JANTX1N4962DUS/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.
The JANTX1N4962DUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode family, engineered specifically for voltage regulation and transient suppression in mission-critical systems where long-term parametric stability and environmental survivability are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTX1N4962DUS/TR?
The JANTX1N4962DUS/TR has a nominal Zener voltage of 15 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. This tolerance applies at 25 °C and 75 mA test current, and is consistent across all JANTX-grade devices in the 1N4954US–1N4996US series. The "D" suffix denotes the ±5% tolerance grade.
Does JANTX1N4962DUS/TR require derating above 140 °C?
Yes, JANTX1N4962DUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. Its thermal resistance is 7 °C/W junction-to-end-cap, so at 150 °C end-cap temperature, maximum allowable power drops to 3.57 W. Derating curves are provided in Figure 1 of the SD44A datasheet.
Is JANTX1N4962DUS/TR compatible with lead-free reflow processes?
No, JANTX1N4962DUS/TR features Sn/Pb (tin/lead) termination and is not rated for lead-free reflow profiles. Its end caps are specified with Sn/Pb finish per the SD44A datasheet, and exposure to peak temperatures >220 °C may compromise hermeticity or metallurgical bond integrity. Lead-free alternatives require redesign or qualification testing.
What is the maximum continuous Zener current for JANTX1N4962DUS/TR?
The maximum continuous Zener current (IZM) for JANTX1N4962DUS/TR is 315 mA at 25 °C ambient, derived from its 5 W power rating and 15 V Zener voltage. At elevated temperatures, this value decreases per the derating curve - e.g., it falls to ~220 mA at 100 °C case temperature.
How is polarity identified on JANTX1N4962DUS/TR?
JANTX1N4962DUS/TR uses a cathode band for polarity identification, located on the glass body adjacent to the cathode end cap. This marking aligns with JEDEC standard orientation for axial and surface-mount Zener diodes, and must be oriented toward the higher-potential node in reverse-bias regulator configurations.
JANTX1N4962DUS/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):
- 15 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 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
JANTX1N4962DUS/TR FAQ
1.How can I place an order for JANTX1N4962DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4962DUS/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 JANTX1N4962DUS/TR reliable?
The price and inventory of JANTX1N4962DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4962DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4962DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4962DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4962DUS/TR?
JANTX1N4962DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4962DUS/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 JANTX1N4962DUS/TR?
For technical support, including JANTX1N4962DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4962DUS/TR requirements.
6.How does Aetrix verify that JANTX1N4962DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4962DUS/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 JANTX1N4962DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4962DUS/TR?
All JANTX1N4962DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4962DUS/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 JANTX1N4962DUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4962DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4962DUS/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
