My Inquiry
My Account
Microchip Technology JANS1N4121D-1/TR
- Part No.:
- JANS1N4121D-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JANS1N4121D-1/TR.pdf
- Description:
- DIODE ZENER 33V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,573
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
JANS1N4121D-1/TR from Microsemi is a 33 V, 1% tolerance, 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 stable voltage regulation at 250 mA test current with 200 Ω dynamic impedance, low noise density (≤40 µV/√Hz), and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the JANS1N4121D-1/TR datasheet, JANS1N4121D-1/TR pinout, JANS1N4121D-1/TR application, or JANS1N4121D-1/TR equivalent, key selection criteria include Zener voltage tolerance (1%), radiation hardness, hermetic glass packaging, MIL-spec qualification level, and thermal derating behavior above 50 °C.
Technical Context
This device functions as a precision shunt voltage regulator operating in reverse breakdown. Its metallurgical bond construction ensures mechanical robustness and low parameter drift under thermal cycling and radiation exposure. The DO-35 axial-glass package provides hermetic sealing and inherent ESD immunity per MIL-STD-750 Method 1020.
It exhibits a positive temperature coefficient of +0.095 %/°C for Zener voltage, enabling predictable drift compensation in temperature-stable references. Maximum Zener current is 40 mA at 25 °C, with linear power derating to zero at 175 °C ambient on standard FR4 board layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33.0 V ±1% at 250 mA - enables precise reference generation in regulated power supplies and voltage monitors. |
| Power Dissipation | 500 mW @ 25 °C lead temp - supports continuous operation in compact, conduction-cooled designs with derating above 50 °C. |
| Dynamic Impedance ZZT | 200 Ω max @ 250 mA - ensures minimal output voltage variation under load transients in feedback loops. |
| Noise Density | ≤40 µV/√Hz @ ≥6.8 V - critical for low-noise analog references and precision instrumentation front-ends. |
| Temp Coefficient αVZ | +0.095 %/°C - allows predictable thermal drift modeling in high-temperature avionics environments. |
| Reverse Leakage IR | 10 µA max @ 25.1 V - guarantees tight regulation onset and low quiescent current in standby circuits. |
| Junction Temp Range | –65 °C to +175 °C - validated for extended-range operation in space-grade and engine-mounted electronics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package. Cathode indicated by black band; banded end is positive during Zener operation. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; establishes reference potential for Zener regulation. |
| Cathode | Zener output terminal | Banded end; supplies regulated 33 V when reverse-biased; must be held at higher potential than anode. |
Key Features
| Feature | Design Value |
|---|---|
| JANS-level MIL-PRF-19500/435 qualification | Validated for mission-critical aerospace systems requiring full lot traceability, burn-in, and radiation hardness assurance. |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and mechanical vibration, improving long-term parameter stability. |
| 1% Zener voltage tolerance | Reduces need for post-assembly trimming in precision reference circuits, lowering calibration cost and test time. |
| Hermetic glass DO-35 package | Prevents moisture ingress and corrosion in humid or saline environments; supports 10+ year field life without encapsulation. |
| Non-ESD-sensitive design | Withstands handling without special grounding protocols per MIL-STD-750 Method 1020, simplifying assembly line integration. |
Applications
| Avionics Power Monitoring | Satellite Voltage Reference |
|---|---|
Use Scenario: Real-time detection of 28 V DC bus overvoltage in flight control computers. IC Role / Device Role / Timing Role: Shunt regulator clamping circuit providing fail-safe voltage thresholding. Use Value: 33 V Zener voltage with 1% tolerance ensures accurate trip point alignment with MIL-STD-704 limits, minimizing false alarms. | Use Scenario: Stable 33 V reference for ADC biasing in radiation-hardened telemetry subsystems. IC Role / Device Role / Timing Role: Precision voltage reference source for analog-to-digital conversion. Use Value: Low 40 µV/√Hz noise density and +0.095 %/°C TC enable <1 LSB error over –55 °C to +125 °C operational range. |
| Missile Guidance Sensor Biasing | Nuclear Reactor Control Interface |
Use Scenario: Providing regulated bias to piezoelectric accelerometers in high-G launch environments. IC Role / Device Role / Timing Role: Low-drift voltage source maintaining sensor sensitivity calibration. Use Value: Metallurgical bond and DO-35 hermeticity prevent parameter shift during 20,000 g shock events and thermal cycling. | Use Scenario: Isolated voltage clamp in safety-critical reactor coolant pump controller I/O modules. IC Role / Device Role / Timing Role: Overvoltage protection element in redundant analog signal conditioning paths. Use Value: JANS qualification and –65 °C to +175 °C rating ensure reliability during emergency cooldown and containment scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4121D-1 | Same electrical specs but qualified to JANTXV level (lower screening rigor than JANS); no radiation hardness validation. | Suitable for high-reliability ground-based military systems where total ionizing dose (TID) is not a concern. | Select when cost and lead time are constrained and radiation environment is benign. |
| 1N4121DUR-1 | Surface-mount DO-213AA package; identical Zener parameters but lacks JANS qualification and hermetic glass seal. | Used in commercial or industrial PCBs where automated placement and space constraints outweigh mil-spec requirements. | Choose only for non-mission-critical applications with no requirement for MIL-PRF-19500 compliance. |
Compared with JANTXV1N4121D-1 and 1N4121DUR-1, the JANS1N4121D-1/TR provides verified radiation hardness, full JANS screening, and hermetic glass packaging-making it the sole option for flight-critical avionics and space-qualified systems demanding guaranteed parametric stability under extreme environmental stress.
Availability
JANS1N4121D-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, satellite voltage reference, and missile guidance sensor biasing requiring stable component supply across extended temperature ranges and radiation environments.
Supply support for JANS1N4121D-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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, RF solutions, and radiation-hardened components for aerospace, defense, and industrial markets.
The JANS1N4121D-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, designed specifically for precision voltage regulation in mission-critical systems where parameter stability under thermal, mechanical, and radiation stress is non-negotiable.
FAQ
What is the Zener voltage tolerance of JANS1N4121D-1/TR?
The JANS1N4121D-1/TR has a nominal Zener voltage of 33.0 V with a tight ±1% tolerance, denoted by the "D" suffix in its part number per Microsemi's nomenclature. This tolerance is guaranteed across the full operating temperature range and is validated during JANS-level screening, making JANS1N4121D-1/TR suitable for applications requiring minimal post-calibration adjustment.
Is JANS1N4121D-1/TR radiation hardened?
Yes, JANS1N4121D-1/TR is inherently radiation hard as documented in Microsemi MicroNote 050. Its metallurgically bonded structure and hermetic DO-35 glass package provide proven resistance to total ionizing dose (TID) and displacement damage, supporting use in low-earth orbit and nuclear environments without additional shielding.
What does the "TR" suffix indicate in JANS1N4121D-1/TR?
"TR" indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. JANS1N4121D-1/TR is supplied in reels optimized for high-volume manufacturing, with full traceability and JANS-level documentation retained for each reel lot.
What is the maximum Zener current for JANS1N4121D-1/TR at 25 °C?
The maximum Zener current IZM for JANS1N4121D-1/TR is 40 mA at 25 °C ambient, derived from its 500 mW power rating and 33 V Zener voltage. This value assumes proper thermal management; current must be reduced linearly above 50 °C lead temperature per the published derating curve.
Does JANS1N4121D-1/TR require special ESD handling?
No, JANS1N4121D-1/TR is non-sensitive to ESD per MIL-STD-750 Method 1020. Its construction eliminates gate oxides or fine-line structures vulnerable to static discharge, allowing standard handling without wrist straps or ionized air-critical for field maintenance and depot repair workflows.
JANS1N4121D-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):
- 33 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 25.1 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)
JANS1N4121D-1/TR FAQ
1.How can I place an order for JANS1N4121D-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4121D-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 JANS1N4121D-1/TR reliable?
The price and inventory of JANS1N4121D-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 JANS1N4121D-1/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4121D-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANS1N4121D-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANS1N4121D-1/TR?
JANS1N4121D-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4121D-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 JANS1N4121D-1/TR?
For technical support, including JANS1N4121D-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4121D-1/TR requirements.
6.How does Aetrix verify that JANS1N4121D-1/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4121D-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 JANS1N4121D-1/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4121D-1/TR?
All JANS1N4121D-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4121D-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 JANS1N4121D-1/TR part is unused and in its original packaging.
Return procedure for JANS1N4121D-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANS1N4121D-1/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…
