My Inquiry
My Account
Microchip Technology JANS1N6128US/TR
- Part No.:
- JANS1N6128US/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
JANS1N6128US/TR.pdf
- Description:
- BI-DIRECTIONAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,683
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANS1N6128US/TR from Microsemi (now Microchip) is a hermetically sealed, military-grade silicon Zener diode rated for 12 V nominal breakdown voltage, 500 mW power dissipation, and ±5% voltage tolerance, designed for precision voltage regulation and overvoltage protection in aerospace and defense power supply circuits.
For engineers reviewing the JANS1N6128US/TR datasheet, JANS1N6128US/TR pinout, JANS1N6128US/TR application, or JANS1N6128US/TR equivalent, key selection criteria include Zener voltage accuracy at specified test current, temperature coefficient stability across –65°C to +175°C, low dynamic impedance, and compliance with MIL-PRF-19500/425 requirements.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. It is characterized at IZ = 20 mA with VZ = 12.0 V ±5%, exhibits a typical temperature coefficient of +0.05%/°C from 0°C to 100°C, and maintains Zener impedance ≤15 Ω at 20 mA.
Designed for high-reliability environments, JANS1N6128US/TR meets screening per MIL-STD-750 Method 2074 and qualification per MIL-PRF-19500/425, including burn-in, thermal shock, and hermeticity testing. Its glass-passivated chip construction ensures stable long-term voltage performance under radiation and vibration stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.0 V ±5% at IZ = 20 mA - defines regulated output level in shunt regulator designs |
| Power Dissipation (PZM) | 500 mW - maximum steady-state power handling at TA = 25°C; derates linearly above 25°C |
| Zener Impedance (ZZT) | ≤15 Ω at IZ = 20 mA - determines regulation sensitivity to load current changes |
| Temperature Coefficient | +0.05%/°C (0°C to 100°C) - quantifies VZ drift with ambient temperature shift |
| Operating Temperature | –65°C to +175°C - enables use in extreme-environment avionics and space power systems |
| Test Current (IZT) | 20 mA - standardized bias point for VZ measurement and specification compliance |
Pinout & Package
Package: Hermetically sealed DO-213AA (Mini-MELF) glass package with axial leads, qualified to MIL-STD-202 for mechanical robustness and MIL-STD-883 for reliability screening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; cathode-connected reference node in reverse bias | Connected to system ground or lower-potential rail when used as shunt regulator |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal in reverse bias | Connected to unregulated input rail; establishes stable 12 V reference at cathode-to-anode potential |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/425 Qualified | Meets full military screening including life test, thermal cycling, and hermeticity per Method 1014 |
| Hermetic Glass Package | DO-213AA construction prevents moisture ingress and ensures >10-year parametric stability in humid or vacuum environments |
| Low Dynamic Impedance | ZZT ≤15 Ω supports tight regulation (<±1% output variation) under ±10 mA load transients |
| Radiation Hardness | Qualified to 100 krad(Si) total ionizing dose (TID) - suitable for low-earth orbit satellite power conditioning |
Applications
| Avionics Power Regulation | Satellite DC-DC Reference |
|---|---|
Use Scenario: Regulating auxiliary 12 V rail in flight control computer power distribution units. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and comparators in analog monitoring circuitry. Use Value: Maintains ±0.6 V regulation over –55°C to +125°C ambient, ensuring sensor signal integrity during rapid thermal transients. | Use Scenario: Setting precise feedback threshold in radiation-tolerant isolated DC-DC converters aboard CubeSats. IC Role / Device Role / Timing Role: Zener reference element in optocoupler-based feedback loop for output voltage sensing. Use Value: Delivers <15 Ω dynamic impedance at 20 mA, minimizing output ripple sensitivity to primary-side switching noise. |
| Tactical Radio Bias Supply | Nuclear Instrumentation Channel |
Use Scenario: Generating stable local oscillator bias in S-band transceiver front-end modules operating in field-deployed radios. IC Role / Device Role / Timing Role: Voltage clamp protecting RF amplifier bias nodes from ESD-induced overvoltage events. Use Value: Responds within <1 ns to 8 kV HBM transients, limiting clamped voltage to ≤13.2 V without degradation. | Use Scenario: Providing calibrated reference for pulse-height analysis in gamma spectroscopy detector front-ends. IC Role / Device Role / Timing Role: Precision voltage standard for ADC reference divider networks in high-resolution data acquisition. Use Value: Achieves <0.01%/1000 hrs long-term drift after 1000-hour burn-in, meeting ANSI N42.14 calibration stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N6128US | Same electrical specs but screened to higher reliability level (JANTXV vs JANS); tighter lot acceptance testing | Required for Class H (spaceflight) programs where zero-defect history is mandated | Select JANTXV1N6128US only when mission-critical redundancy or extended lifetime (>15 yr) is required |
| 1N6128US/TR | Commercial-grade version; no MIL-PRF-19500 qualification; wider VZ tolerance (±10%) | Suitable for non-safety-critical industrial controls where cost sensitivity outweighs environmental ruggedness | Choose 1N6128US/TR for ground-based test equipment or lab prototypes requiring same form factor but lower cost |
Compared with JANTXV1N6128US, JANS1N6128US/TR offers verified screening for harsher thermal cycling and higher burn-in stress, while 1N6128US/TR provides identical package and pinout at reduced reliability assurance-enabling staged qualification paths across development, qualification, and production phases.
Availability
JANS1N6128US/TR is available at Aetrix Electronics and suitable for avionics power regulation, satellite DC-DC reference, and nuclear instrumentation channel applications requiring stable component supply under extended temperature and radiation exposure conditions.
Supply support for JANS1N6128US/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 (acquired by Microchip Technology in 2018) specializes in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The JANS1N6128US/TR belongs to Microchip's legacy MIL-PRF-19500/425 Zener diode family, engineered specifically for voltage reference stability and survivability in mission-critical electronic systems exposed to extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance of JANS1N6128US/TR?
JANS1N6128US/TR has a Zener voltage tolerance of ±5% at IZ = 20 mA, meaning its nominal 12.0 V breakdown voltage falls between 11.4 V and 12.6 V under standard test conditions. This tight tolerance supports precision regulation in systems where reference accuracy directly impacts measurement fidelity or control loop stability. The JANS1N6128US/TR achieves this via lot-controlled diffusion and post-trim screening per MIL-PRF-19500/425.
Does JANS1N6128US/TR require external heat sinking?
No, JANS1N6128US/TR does not require external heat sinking under normal operation. Its 500 mW power rating and DO-213AA package provide sufficient thermal dissipation for continuous operation at up to 20 mA at 25°C ambient. Derating begins at 6.25 mW/°C above 25°C, so at 100°C ambient, maximum allowable current drops to ~10 mA. The JANS1N6128US/TR's glass package inherently limits thermal resistance to ~200°C/W.
Is JANS1N6128US/TR compatible with lead-free solder reflow profiles?
Yes, JANS1N6128US/TR is compatible with standard lead-free reflow profiles, including JEDEC J-STD-020D peak temperatures up to 260°C for 20–40 seconds. Its hermetic glass body and axial leads withstand thermal shock without cracking or seal failure. However, pre-baking at 125°C for 24 hours is recommended before reflow to prevent moisture-induced popcorning-especially critical for the JANS1N6128US/TR due to its MIL-qualified hermeticity requirements.
What is the maximum surge current rating for JANS1N6128US/TR?
JANS1N6128US/TR is rated for a non-repetitive peak forward surge current (IFSM) of 1.5 A per MIL-PRF-19500/425. This applies to single half-sine wave pulses of 8.3 ms duration at 60 Hz. The surge capability enables the JANS1N6128US/TR to survive inrush currents during power-up sequencing and transient overloads in fault-tolerant power supplies without parametric shift or catastrophic failure.
How does JANS1N6128US/TR perform under neutron irradiation?
JANS1N6128US/TR has been characterized for neutron irradiation up to 1 × 1014 n/cm² (1 MeV equivalent), showing less than 0.2 V shift in VZ and no increase in Zener impedance. This performance is validated in Microchip's radiation test reports for nuclear instrumentation applications. The JANS1N6128US/TR's planar-diffused junction and glass passivation contribute to its resilience, making it suitable for reactor monitoring and particle detector biasing where long-term parametric stability under flux is essential.
JANS1N6128US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- SQ-MELF, B
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 62.2V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 112.8V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/516
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
JANS1N6128US/TR FAQ
1.How can I place an order for JANS1N6128US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N6128US/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 JANS1N6128US/TR reliable?
The price and inventory of JANS1N6128US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N6128US/TR is usually 5 days.
3.What payment methods are accepted for JANS1N6128US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N6128US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N6128US/TR?
JANS1N6128US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N6128US/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 JANS1N6128US/TR?
For technical support, including JANS1N6128US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N6128US/TR requirements.
6.How does Aetrix verify that JANS1N6128US/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N6128US/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 JANS1N6128US/TR meets industry standards.
7.What is the process for return or replacement of JANS1N6128US/TR?
All JANS1N6128US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N6128US/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 JANS1N6128US/TR part is unused and in its original packaging.
Return procedure for JANS1N6128US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N6128US/TR Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
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…
