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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology JANTX1N4961CUS/TR

Name: JANTX1N4961CUS/TR
Brand: Microchip Technology
SKU: JANTX1N4961CUS/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANTX1N4961CUS/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: SQ-MELF, E

Datasheet:: JANTX1N4961CUS/TR.pdf

Description:: DIODE ZENER 13V 5W E-MELF

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Product details

Overview

JANTX1N4961US/TR from Microsemi is a surface-mount, hermetically sealed, voidless-glass 5 W Zener diode with nominal Zener voltage of 13 V, ±5% tolerance, 3.0 Ω dynamic impedance at 100 mA test current, and maximum reverse leakage of 10 μA at 9.9 V. It operates from –65 °C to +175 °C and is qualified to MIL-PRF-19500/356 for high-reliability voltage regulation in aerospace power conditioning circuits.

For engineers reviewing the JANTX1N4961US/TR datasheet, JANTX1N4961US/TR pinout, JANTX1N4961US/TR application, or JANTX1N4961US/TR equivalent, this part delivers military-grade thermal stability, radiation-hardened construction, and verified surge robustness - critical for avionics voltage reference and overvoltage clamp design where failure is not an option.

Technical Context

This Zener regulator uses a Category I internal metallurgical bond and triple-layer passivation to ensure long-term reliability under extreme thermal cycling and radiation exposure. Its voidless hermetic glass package eliminates moisture ingress and interfacial delamination risks common in epoxy-based SMT diodes.

The device exhibits low temperature coefficient (±0.08 %/°C), stable regulation across 10–50% of IZM (ΔVZ ≤ 0.9 V), and maintains <2 V forward voltage at 1 A - enabling precise clamping and reference functions in high-temperature analog front-ends and DC-DC feedback paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	13 V nominal at 100 mA - sets stable reference point for precision voltage monitoring and error amplifier feedback.
Power Dissipation	5 W @ T_EC = 140 °C - supports sustained regulation in compact, conduction-cooled aerospace modules.
Dynamic Impedance (Z_Z)	3.0 Ω at I_ZT = 100 mA - ensures minimal output voltage variation under load transients.
Reverse Leakage (I_R)	10 μA max at V_R = 9.9 V - guarantees low quiescent current draw in battery-backed systems.
Operating Temperature	–65 °C to +175 °C - validated for use in engine-mounted electronics and space-grade power supplies.
Surge Current (I_ZSM)	16 A peak (8.3 ms square wave) - withstands lightning-induced transients per DO-160 Section 22.
Thermal Resistance	7 °C/W junction-to-end-cap - enables predictable thermal design without forced airflow.

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 ground or lower-potential node in shunt regulator configuration.
Cathode	Zener breakdown terminal	Connected to regulated voltage node; band-marked end for polarity identification during placement.

Key Features

Feature	Design Value
Voidless hermetic glass seal	Eliminates moisture-induced parameter drift and corrosion in humid or vacuum environments.
Category I metallurgical bond	Ensures mechanical integrity and thermal cycle survivability exceeding 1000 cycles between –65 °C and +175 °C.
Nonsensitive to ESD	Qualified per MIL-STD-750 Method 1020 - no handling precautions required beyond standard Class 1A protocols.
Radiation hardness	Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for low-earth orbit applications.
Triple-layer passivation	Prevents surface conduction paths and leakage growth under high humidity or contamination exposure.

Applications

Aerospace Power Conditioning	Avionics Voltage Reference
Use Scenario: Regulating 28 VDC bus-derived auxiliary rails in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable 13 V reference for ADC biasing and op-amp offset trimming. Use Value: Maintains regulation accuracy within ±1.5% over full temperature range and 1000-hour life test, eliminating recalibration.	Use Scenario: Generating precision reference for inertial measurement unit (IMU) sensor excitation. IC Role / Device Role / Timing Role: Zener-based voltage reference in analog signal chain front-end, directly feeding instrumentation amplifiers. Use Value: Low ΔVZ (≤0.9 V) and ±0.08%/°C TC enable sub-0.1% reference drift over –55 °C to +125 °C operating envelope.
Military Vehicle Power Protection	Satellite Power Management
Use Scenario: Clamping transient spikes on 270 VDC primary distribution bus in armored vehicle electronics. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing 16 A surge pulses per DO-160 Section 22 Level 4. Use Value: Withstands 1000+ surge events without parameter shift due to robust glass/metal interface and low thermal impedance.	Use Scenario: Stabilizing bias voltage for radiation-tolerant FPGA configuration memory in LEO satellites. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference maintaining stable operation after 100 krad(Si) TID exposure. Use Value: Inherent radiation tolerance eliminates need for shielding or derating, reducing mass and volume in constrained payload bays.

Aerospace Power Conditioning

Avionics Voltage Reference

Use Scenario: Regulating 28 VDC bus-derived auxiliary rails in flight control computers.

IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable 13 V reference for ADC biasing and op-amp offset trimming.

Use Value: Maintains regulation accuracy within ±1.5% over full temperature range and 1000-hour life test, eliminating recalibration.

Use Scenario: Generating precision reference for inertial measurement unit (IMU) sensor excitation.

IC Role / Device Role / Timing Role: Zener-based voltage reference in analog signal chain front-end, directly feeding instrumentation amplifiers.

Use Value: Low ΔVZ (≤0.9 V) and ±0.08%/°C TC enable sub-0.1% reference drift over –55 °C to +125 °C operating envelope.

Military Vehicle Power Protection

Satellite Power Management

Use Scenario: Clamping transient spikes on 270 VDC primary distribution bus in armored vehicle electronics.

IC Role / Device Role / Timing Role: Overvoltage protection element absorbing 16 A surge pulses per DO-160 Section 22 Level 4.

Use Value: Withstands 1000+ surge events without parameter shift due to robust glass/metal interface and low thermal impedance.

Use Scenario: Stabilizing bias voltage for radiation-tolerant FPGA configuration memory in LEO satellites.

IC Role / Device Role / Timing Role: Radiation-hardened Zener reference maintaining stable operation after 100 krad(Si) TID exposure.

Use Value: Inherent radiation tolerance eliminates need for shielding or derating, reducing mass and volume in constrained payload bays.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
JANTXV1N4961US/TR	Higher screening level (JANTXV vs. JANTX); tighter parametric limits and extended burn-in per MIL-PRF-19500/356.	Required for mission-critical subsystems where zero-defect reliability is mandated (e.g., flight termination systems).	Select JANTXV1N4961US/TR when full JANTXV qualification and lot traceability are contractually required.
1N4961US/TR	Commercial-grade version; no MIL-qualified screening, wider parameter tolerances, and non-hermetic packaging options available.	Suitable only for non-safety-critical industrial controls or lab equipment with ambient temperature operation.	Choose 1N4961US/TR only for cost-sensitive, non-military applications where MIL-spec compliance is not required.

Compared with JANTX1N4961US/TR, JANTXV1N4961US/TR adds enhanced screening for ultra-high reliability, while 1N4961US/TR omits military qualification entirely - making the JANTX grade the optimal balance of assured performance and procurement availability for defense contractors.

Availability

JANTX1N4961US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, avionics voltage reference, and military vehicle power protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for JANTX1N4961US/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 JANTX1N4961US/TR belongs to Microsemi's military-qualified Zener diode family, engineered specifically for voltage regulation and transient suppression in harsh-environment electronics where failure is unacceptable.

FAQ

What is the Zener voltage tolerance for JANTX1N4961US/TR?

JANTX1N4961US/TR has a nominal Zener voltage of 13 V with a standard ±5% tolerance, as defined in MIL-PRF-19500/356. This tolerance applies across the full operating temperature range of –65 °C to +175 °C and is verified during military screening. Tighter tolerances (e.g., ±2% or ±1%) require different suffixes (C or D) not present in the JANTX1N4961US/TR designation.

Is JANTX1N4961US/TR compatible with lead-free solder reflow profiles?

JANTX1N4961US/TR features Sn/Pb-finished copper end caps and is rated for operation up to +175 °C junction temperature, but its termination finish is not lead-free. It is not compatible with standard Pb-free reflow profiles (e.g., JEDEC J-STD-020). For lead-free assembly, consult Microchip's qualified alternatives or verify compatibility with controlled ramp-rate profiles below 235 °C peak.

Does JANTX1N4961US/TR require derating above 140 °C case temperature?

Yes. JANTX1N4961US/TR is rated for 5 W dissipation only at T_EC = 140 °C. Above that temperature, power must be linearly derated to zero at +175 °C, yielding a derating slope of 142.9 mW/°C. This is documented in the Maximum Ratings table of the SD44A datasheet and applies regardless of mounting method or PCB copper area.

What is the maximum continuous Zener current (I_ZM) for JANTX1N4961US/TR?

The maximum continuous Zener current for JANTX1N4961US/TR is 365 mA, calculated from P_D = 5 W and V_Z = 13 V (I_ZM = P_D/V_Z). This value is confirmed in the Electrical Characteristics table on page 2 of SD44A, where I_ZM is listed as 365 mA at 25 °C ambient.

How is cathode polarity marked on JANTX1N4961US/TR?

JANTX1N4961US/TR uses a visible band on the glass body to indicate the cathode terminal, consistent with industry-standard diode marking. The band aligns with the cathode end cap, which connects to the higher-potential node in shunt regulator configurations. No alphanumeric marking is applied per the Mechanical and Packaging section of SD44A.

JANTX1N4961CUS/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):: 13 V

Tolerance:: ±2%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 3 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 9.9 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

JANTX1N4961CUS/TR FAQ

1.How can I place an order for JANTX1N4961CUS/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANTX1N4961CUS/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 JANTX1N4961CUS/TR reliable?

The price and inventory of JANTX1N4961CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4961CUS/TR is usually 5 days.

3.What payment methods are accepted for JANTX1N4961CUS/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4961CUS/TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for JANTX1N4961CUS/TR?

JANTX1N4961CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANTX1N4961CUS/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 JANTX1N4961CUS/TR?

For technical support, including JANTX1N4961CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4961CUS/TR requirements.

6.How does Aetrix verify that JANTX1N4961CUS/TR is sourced from the original manufacturer or authorized distributors?

All JANTX1N4961CUS/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 JANTX1N4961CUS/TR meets industry standards.

7.What is the process for return or replacement of JANTX1N4961CUS/TR?

All JANTX1N4961CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4961CUS/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 JANTX1N4961CUS/TR part is unused and in its original packaging.

Return procedure for JANTX1N4961CUS/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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