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Microchip Technology JANS1N4128-1/TR
- Part No.:
- JANS1N4128-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4128-1/TR.pdf
- Description:
- DIODE ZENER 60V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,596
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Product details
Overview
JANS1N4128-1/TR from Microsemi is a 60 V, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435 for high-reliability aerospace and defense applications. It delivers 60.0 V nominal Zener voltage at 250 mA test current, with ±5% tolerance, 400 Ω dynamic impedance, and 0.01 µA reverse leakage at 45.6 V.
For engineers reviewing the JANS1N4128-1/TR datasheet, JANS1N4128-1/TR pinout, JANS1N4128-1/TR application, or JANS1N4128-1/TR equivalent, key selection criteria include military-grade reliability qualification, low noise density (≤1 µV/√Hz below 6.8 V), radiation hardness, and axial-leaded DO-35 thermal performance up to +175 °C junction temperature.
Technical Context
This device operates as a precision voltage reference and regulator in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond construction ensures stable Zener voltage regulation across wide current (250 mA IZT) and temperature (–65 to +175 °C) ranges, supporting operation in harsh environments without derating until lead temperature exceeds 50 °C.
The JANS1N4128-1/TR exhibits a positive temperature coefficient of +0.100 %/°C, enabling predictable voltage drift in thermal cycling. Its 400 Ω dynamic impedance at 250 mA and minimal capacitance (typical <2 pF at 60 V) support stable regulation in low-noise analog and power-supply feedback circuits where transient response and signal integrity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 60.0 V at 250 mA - defines precise regulation point for reference and clamping circuits |
| Power Dissipation | 500 mW at 25 °C - supports continuous operation in compact axial-leaded layouts with linear derating to zero at 175 °C |
| Zener Impedance ZZT | 400 Ω - determines output voltage stability under load variation in feedback loops |
| Reverse Leakage IR | 0.01 µA at 45.6 V - ensures minimal standby current in high-impedance bias networks |
| Temp Coefficient αVZ | +0.100 %/°C - enables predictable voltage drift compensation in temperature-critical systems |
| Noise Density | ≤1 µV/√Hz - meets low-noise requirements for precision instrumentation and ADC reference buffers |
| Junction Temp Range | –65 to +175 °C - qualifies for extended-range operation in space, avionics, and nuclear systems |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with tin-lead or RoHS-compliant matte-tin plating; cathode indicated by band; weight ≈ 0.2 g; lead length 25.4–38.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener reference ground node | Serves as circuit common when used in shunt regulation; must be connected to lowest potential point in regulated path |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Provides stable 60 V reference when reverse-biased; connects to input supply rail in clamp or reference configurations |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JANS qualification | Guarantees screening, testing, and traceability for flight-critical and strategic defense systems |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration, ensuring long-term parameter stability |
| Radiation hardness | Inherently resistant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space electronics |
| Low noise density | ≤1 µV/√Hz at 60 V enables use in high-resolution analog front-ends without added filtering |
| Hermetic glass sealing | Prevents moisture ingress and parametric drift over decades in sealed enclosures or vacuum environments |
Applications
| Aerospace Power Monitoring | Nuclear Instrumentation |
|---|---|
Use Scenario: Voltage reference in radiation-hardened DC-DC converter feedback loop for satellite power bus regulation. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 60 V setpoint for error amplifier comparison. Use Value: JANS1N4128-1/TR's +0.100 %/°C tempco and TID resilience ensure regulation accuracy remains within ±1.5% over –55 to +125 °C orbit thermal cycles. | Use Scenario: High-voltage bias reference for scintillation detector photomultiplier tube (PMT) anode chains. IC Role / Device Role / Timing Role: Precision 60 V Zener source establishing stable gain calibration across PMT dynode stages. Use Value: JANS1N4128-1/TR's 0.01 µA leakage at 45.6 V prevents current-induced gain drift in ultra-high-impedance detector circuits. |
| Avionics Sensor Interface | Strategic Defense Signal Conditioning |
Use Scenario: Overvoltage clamp protecting analog-to-digital converter inputs in engine control unit (ECU) sensor signal paths. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input to 60 V during ESD or load dump events. Use Value: JANS1N4128-1/TR's 400 Ω ZZT and DO-35 thermal resistance (250 °C/W junction-to-lead) enable reliable clamping without thermal runaway at 250 mA surge. | Use Scenario: Reference element in hardened timing generator for secure communications encryption clock recovery. IC Role / Device Role / Timing Role: Low-noise 60 V reference feeding voltage-controlled oscillator (VCO) tuning network. Use Value: JANS1N4128-1/TR's ≤1 µV/√Hz noise density minimizes phase jitter in recovered clock signals under electromagnetic interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4128US-1 | Same 60 V Zener voltage and JANS qualification, but in DO-213AA surface-mount package | Requires PCB re-layout for SMT assembly; lacks axial mounting flexibility | Select when board space constraints mandate surface-mount integration without lead-forming |
| JANTXV1N4128-1 | Identical electrical specs and DO-35 package, but qualified only to JANTXV (not JANS) per MIL-PRF-19500/435 | Not approved for mission-critical space or nuclear applications requiring full JANS screening | Select for high-reliability ground-based defense systems where JANS-level testing is not mandated |
Compared with JANS1N4128-1/TR, the 1N4128US-1 offers identical regulation performance in a space-saving SMT form factor, while JANTXV1N4128-1 provides cost-optimized access to the same Zener characteristics with reduced screening depth-both require explicit validation against system-level radiation, thermal, and mechanical requirements.
Availability
JANS1N4128-1/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, nuclear instrumentation, and avionics sensor interface applications requiring stable component supply, full traceability, and guaranteed long-term availability.
Supply support for JANS1N4128-1/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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANS1N4128-1/TR belongs to Microsemi's MIL-qualified Zener diode family engineered for precision voltage regulation in radiation-intensive, thermally extreme, and safety-critical systems.
FAQ
What is the Zener voltage tolerance for JANS1N4128-1/TR?
JANS1N4128-1/TR has a nominal Zener voltage of 60.0 V with a standard tolerance of ±5%, as defined by its JEDEC registration and MIL-PRF-19500/435 qualification. This tolerance applies at 250 mA test current and 25 °C ambient temperature, and is maintained across the full JANS screening and burn-in process to ensure consistency in high-reliability deployments.
Is JANS1N4128-1/TR RoHS compliant?
No, JANS1N4128-1/TR is not RoHS compliant. The "JANS" prefix indicates military-specification qualification under MIL-PRF-19500/435, which permits leaded terminations. RoHS-compliant versions (e.g., with "e3" suffix) are available only for commercial-grade variants such as 1N4128-1e3-not for JANS-level devices like JANS1N4128-1/TR.
What is the maximum reverse leakage current for JANS1N4128-1/TR?
JANS1N4128-1/TR specifies a maximum reverse leakage current (IR) of 0.01 µA at 45.6 V (76% of nominal Zener voltage). This ultra-low leakage is verified during JANS-level screening and supports use in high-impedance bias networks where even femtoamp-level currents could degrade measurement accuracy or timing stability.
Can JANS1N4128-1/TR be used in surface-mount designs?
JANS1N4128-1/TR is packaged in axial-leaded DO-35 and is not designed for direct surface-mount assembly. For SMT-compatible equivalents, consider the 1N4128US-1 in DO-213AA package-same 60 V Zener voltage and JANS qualification-but requires separate layout and reflow validation. JANS1N4128-1/TR must be through-hole mounted with appropriate lead forming and strain relief.
What is the thermal resistance specification for JANS1N4128-1/TR?
JANS1N4128-1/TR has a junction-to-lead thermal resistance (RθJL) of 250 °C/W when measured with 10 mm (3/8 inch) lead length from the body, per MIL-STD-750 test method. This value assumes standard FR4 board mounting with 4 mm² copper pads and is critical for calculating safe operating area under sustained 250 mA Zener current conditions.
JANS1N4128-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 60 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 45.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JANS1N4128-1/TR FAQ
1.How can I place an order for JANS1N4128-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4128-1/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 JANS1N4128-1/TR reliable?
The price and inventory of JANS1N4128-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4128-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4128-1/TR?
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4.How is shipping managed for JANS1N4128-1/TR?
JANS1N4128-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4128-1/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 JANS1N4128-1/TR?
For technical support, including JANS1N4128-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4128-1/TR requirements.
6.How does Aetrix verify that JANS1N4128-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4128-1/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 JANS1N4128-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4128-1/TR?
All JANS1N4128-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4128-1/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 JANS1N4128-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4128-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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