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Microchip Technology JAN1N4112-1/TR
- Part No.:
- JAN1N4112-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4112-1/TR.pdf
- Description:
- DIODE ZENER 18V DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,839
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Product details
Overview
JAN1N4112-1/TR from Microsemi is a 500 mW, 18.0 V ±5% metallurgically bonded glass Zener diode in DO-35 (DO-204AH) axial package, qualified to JAN level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JAN1N4112-1/TR datasheet, JAN1N4112-1/TR pinout, JAN1N4112-1/TR application, or JAN1N4112-1/TR equivalent, key selection criteria include its 18.0 V nominal Zener voltage at 250 mA test current, 100 Ω dynamic impedance, 0.05 µA max reverse leakage at 14.4 V, radiation-hardened construction, and hermetic DO-35 packaging suitable for harsh-environment analog reference and overvoltage protection circuits.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, delivering stable regulation across wide current (1–40 mA) and temperature (−65 °C to +175 °C) ranges. Its metallurgical bond ensures low noise density (1 µV/√Hz typical at 18 V) and minimal capacitance (~3 pF), critical for precision reference and low-jitter timing circuits.
Thermal resistance is 250 °C/W junction-to-lead (at 10 mm lead length) and 300 °C/W junction-to-ambient on FR4, enabling reliable 500 mW dissipation with linear derating above 50 °C. It exhibits a +0.090 %/°C temperature coefficient, supporting stable mid-range voltage references where drift must remain under ±1.6% over −55 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 18.0 V at 250 mA - defines precise regulation point for feedback loops and reference generation |
| Zener Impedance | 100 Ω at 250 mA - ensures low output impedance for stable regulation under load transients |
| Max Reverse Leakage | 0.05 µA at 14.4 V - guarantees minimal error current in high-impedance reference paths |
| Power Dissipation | 500 mW at 25 °C - supports robust operation in compact, conduction-cooled designs |
| Temp Coefficient | +0.090 %/°C - enables predictable drift compensation in temperature-critical analog systems |
| Noise Density | 1 µV/√Hz at 18 V - meets low-noise requirements for precision instrumentation and ADC references |
| Junction Temp Range | −65 °C to +175 °C - qualifies for extended-temperature military and space-grade applications |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package, 0.056–0.090 inch body diameter, 0.140–0.200 inch body length, ~0.2 g mass. Cathode indicated by single black band; banded end is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased current sink | Connected to circuit ground or lower-potential node; carries full Zener current during regulation |
| Cathode | Regulated output node | Banded terminal; provides stable 18.0 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 JAN qualification | Validated reliability for mission-critical aerospace and defense systems with full traceability and screening |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock |
| Hermetic glass DO-35 package | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 - suitable for space electronics |
| Low capacitance (~3 pF) | Minimizes high-frequency loading in RF bias networks and fast-switching protection circuits |
Applications
| Avionics Power Reference | Spacecraft Voltage Clamp |
|---|---|
Use Scenario: Providing stable 18 V reference for analog-to-digital converters and sensor signal conditioning in flight control computers. IC Role / Device Role / Timing Role: Precision Zener reference diode establishing regulated bias voltage for op-amp and ADC front-ends. Use Value: Maintains <±0.5% output stability over −55 °C to +125 °C due to +0.090 %/°C tempco and low thermal resistance. | Use Scenario: Clamping transient overvoltages on 28 V DC bus lines in satellite power distribution units. IC Role / Device Role / Timing Role: High-reliability Zener clamp absorbing ESD and load-dump spikes without degradation. Use Value: Survives >100 krad(Si) TID and retains regulation performance after radiation exposure per MicroNote 050. |
| Ground Vehicle Control Module | Tactical Radio Bias Supply |
Use Scenario: Regulating auxiliary 18 V rail for microcontroller I/O buffers and CAN transceiver bias in armored vehicle ECUs. IC Role / Device Role / Timing Role: Primary Zener regulator in discrete LDO pre-regulator stage for noise-sensitive digital subsystems. Use Value: Delivers 1 µV/√Hz noise floor and <100 Ω dynamic impedance to suppress switching noise coupling into logic rails. | Use Scenario: Generating clean 18 V bias for RF power amplifier stages in manpack radios operating in extreme desert or arctic conditions. IC Role / Device Role / Timing Role: Hermetically sealed Zener reference ensuring stable PA bias despite rapid ambient temperature swings. Use Value: Operates continuously from −65 °C to +175 °C with no parameter shift beyond spec limits, validated per JANS screening. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4112US | Same 18 V Zener voltage and DO-35 package, but commercial-grade (non-mil-qualified); RoHS-compliant matte-tin plating. | Lacks JAN-level screening, thermal cycling, and radiation testing - unsuitable for flight hardware. | Select when cost-sensitive industrial designs require same electrical specs without mil-spec validation. |
| JANTXV1N4112 | Identical electrical specs and DO-35 package, but qualified to JANTXV level with enhanced screening (e.g., burn-in, thermal shock). | Supports higher assurance programs requiring extended life testing and tighter parametric lot controls. | Choose for avionics programs requiring JANTXV compliance per MIL-PRF-19500/435, especially where failure modes demand zero-defect screening. |
Compared with 1N4112US and JANTXV1N4112, JAN1N4112-1/TR delivers verified JAN-level reliability with full traceability and radiation tolerance, making it the only option qualified for Class S space applications and critical airborne systems where component pedigree is mandatory.
Availability
JAN1N4112-1/TR is available at Aetrix Electronics and suitable for avionics power reference, spacecraft voltage clamp, and ground vehicle control module applications requiring stable component supply, full mil-spec traceability, and long-term obsolescence management.
Supply support for JAN1N4112-1/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The JAN1N4112-1/TR belongs to Microsemi's legacy 1N4099–1N4135 series of mil-qualified Zener diodes, engineered specifically for voltage regulation in mission-critical systems where parameter stability, hermeticity, and radiation tolerance are non-negotiable.
FAQ
What is the Zener voltage tolerance for JAN1N4112-1/TR?
JAN1N4112-1/TR has a nominal Zener voltage of 18.0 V with a standard tolerance of ±5%, as defined in the JEDEC-registered 1N4099–1N4135 family specification and confirmed in the T4-LDS-0245-2 datasheet. This tolerance applies at 25 °C with the diode in thermal equilibrium and is maintained across the full JAN qualification screening process.
Is JAN1N4112-1/TR RoHS compliant?
No, JAN1N4112-1/TR is not RoHS compliant. Per the T4-LDS-0245-2 datasheet, RoHS-compliant versions (e.g., with e3 suffix) are available only for commercial-grade parts; JAN-level devices like JAN1N4112-1/TR use traditional tin-lead plating to meet MIL-STD-750 solderability requirements and maintain legacy qualification integrity.
What is the maximum Zener test current for JAN1N4112-1/TR?
The maximum Zener test current for JAN1N4112-1/TR is 250 mA, as specified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This current establishes the 18.0 V nominal Zener voltage and is used to measure dynamic impedance (100 Ω) and noise density (1 µV/√Hz) under standardized test conditions.
Does JAN1N4112-1/TR have radiation-hardened characteristics?
Yes, JAN1N4112-1/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050. Its metallurgically bonded structure and hermetic DO-35 package provide tolerance to total ionizing dose (TID), making it suitable for low-earth orbit and other radiation-prone environments without additional shielding or derating.
What is the thermal resistance junction-to-lead for JAN1N4112-1/TR?
The thermal resistance junction-to-lead (RθJL) for JAN1N4112-1/TR is 250 °C/W when measured with 3/8 inch (10 mm) lead length from the body, per the Maximum Ratings table on page 1 of T4-LDS-0245-2. This value enables accurate thermal modeling for conduction-cooled mounting in high-density military PCB layouts.
JAN1N4112-1/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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- -
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JAN1N4112-1/TR FAQ
1.How can I place an order for JAN1N4112-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4112-1/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 JAN1N4112-1/TR reliable?
The price and inventory of JAN1N4112-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4112-1/TR is usually 5 days.
3.What payment methods are accepted for JAN1N4112-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4112-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4112-1/TR?
JAN1N4112-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4112-1/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 JAN1N4112-1/TR?
For technical support, including JAN1N4112-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4112-1/TR requirements.
6.How does Aetrix verify that JAN1N4112-1/TR is sourced from the original manufacturer or authorized distributors?
All JAN1N4112-1/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 JAN1N4112-1/TR meets industry standards.
7.What is the process for return or replacement of JAN1N4112-1/TR?
All JAN1N4112-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4112-1/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 JAN1N4112-1/TR part is unused and in its original packaging.
Return procedure for JAN1N4112-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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