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Microchip Technology JAN1N4618-1
- Part No.:
- JAN1N4618-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4618-1.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,013
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Product details
Overview
JAN1N4618-1 from Microsemi is a 500 mW, 2.7 V Zener voltage regulator diode in DO-35 glass axial-leaded package, qualified to JANS level per MIL-PRF-19500/435, with 2% voltage tolerance (C suffix implied by JAN prefix), 1500 Ω dynamic impedance at 250 mA test current, and -0.075 %/°C temperature coefficient - used for precision low-voltage reference and regulation in military avionics power supplies.
For engineers reviewing the JAN1N4618-1 datasheet, JAN1N4618-1 pinout, JAN1N4618-1 application, or JAN1N4618-1 equivalent, key selection criteria include Zener voltage stability under thermal stress, low-noise operation below 1 μV/√Hz, hermetic glass packaging for radiation-hardened environments, and compliance with MIL-PRF-19500/435 reliability levels up to JANS.
Technical Context
The JAN1N4618-1 operates as a reverse-biased Zener regulator with metallurgically bonded junction, enabling stable 2.7 V reference output across 0.5–90 mA operating current range. Its internal bond structure ensures low noise density (1 μV/√Hz) and minimal capacitance (<1 pF), critical for analog sensing and timing circuits.
Designed for high-reliability mil-aero applications, it features full JANS qualification, -65 °C to +175 °C junction temperature range, and thermal resistance of 250 °C/W (junction-to-lead at 10 mm lead length), supporting operation in conduction-cooled chassis without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.7 V ±2% at 250 mA - defines precise regulation point for low-voltage biasing and reference generation |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - sets maximum continuous thermal load on PCB traces |
| Dynamic Impedance ZZT | 1500 Ω at IZT = 250 mA - determines output voltage variation under load transients |
| Temperature Coefficient αVZ | -0.075 %/°C - enables predictable drift compensation in wide-temperature-range designs |
| Noise Density ND | 1 μV/√Hz at 250 mA - supports low-noise analog front-ends and precision ADC references |
| Reverse Leakage IR | 0.5 μA at 1.0 V - ensures minimal standby current in battery-backed systems |
| Junction Temperature Range | -65 °C to +175 °C - qualifies for extended-temperature military and aerospace deployments |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode indicated by band; banded end must be held positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference Ground Node | Connected to system ground or lowest potential node; establishes return path for Zener current |
| Cathode | Regulated Output Terminal | Banded end; supplies stable 2.7 V when reverse-biased; requires current-limiting resistor in series |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical Bond Construction | Enables radiation hardness per MicroNote 050 and eliminates interfacial delamination under thermal cycling |
| MIL-PRF-19500/435 Qualification | Validated JANS-level reliability for space-grade and flight-critical subsystems |
| Low Capacitance | Typical <1 pF - preserves signal integrity in RF detector and fast-switching regulator feedback paths |
| ESD Immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| RoHS Compliant Option | e3 suffix available (commercial grade only) - supports environmental compliance without sacrificing electrical performance |
Applications
| Avionics Power Reference | Military Sensor Biasing |
|---|---|
Use Scenario: Providing stable 2.7 V reference for analog-to-digital converters in airborne inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling and offset calibration. Use Value: -0.075 %/°C tempco and 2% tolerance ensure <±30 mV drift over -55 °C to +125 °C operational range. | Use Scenario: Biasing photodiode amplifiers in ruggedized battlefield optical sensors exposed to thermal shock. IC Role / Device Role / Timing Role: Low-noise Zener regulator supplying clean bias to op-amp input stages. Use Value: 1 μV/√Hz noise density prevents signal degradation in sub-microvolt-level photocurrent detection. |
| Satellite Power Conditioning | Tactical Radio Voltage Clamp |
Use Scenario: Regulating auxiliary rail in radiation-hardened satellite DC-DC converter feedback loops. IC Role / Device Role / Timing Role: Radiation-tolerant Zener clamp protecting error amplifier inputs from transient overvoltage. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy in LEO missions. | Use Scenario: Clamping 3.3 V logic supply against ESD events in handheld tactical radios subjected to MIL-STD-810G environmental stress. IC Role / Device Role / Timing Role: Transient voltage suppressor and precision clamp diode in power rail protection circuitry. Use Value: Hermetic DO-35 package withstands 1000+ thermal cycles without seal failure, ensuring field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4618-1 | Same 2.7 V Zener, identical DO-35 package, but qualified to JANTXV level (not JANS); higher screening but lower radiation tolerance | Approved for high-reliability ground-based radar systems, not certified for spaceflight | Select when JANS qualification is unnecessary and cost sensitivity favors JANTXV screening |
| 1N4618UR-1 | Same electrical specs, but in DO-213AA surface-mount package; no axial leads; RoHS-compliant matte-tin plating | Used in automated SMT production lines where through-hole assembly is unavailable or undesirable | Select for board-space-constrained designs requiring reflow-compatible mounting and commercial RoHS compliance |
Compared with JAN1N4618-1, JANTXV1N4618-1 offers reduced radiation hardness but faster procurement lead times, while 1N4618UR-1 trades hermetic axial leads for SMT compatibility and eliminates manual insertion - both require layout changes and do not substitute without redesign.
Availability
JAN1N4618-1 is available at Aetrix Electronics and suitable for avionics power reference, military sensor biasing, and satellite power conditioning requiring stable component supply across extended temperature and radiation environments.
Supply support for JAN1N4618-1 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, radiation-hardened, and defense-grade analog and mixed-signal components.
The JAN1N4618-1 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for precision voltage regulation in mission-critical aerospace, defense, and space electronics where long-term parametric stability and environmental survivability are mandatory.
FAQ
What is the Zener voltage tolerance for JAN1N4618-1?
JAN1N4618-1 has a nominal Zener voltage of 2.7 V with ±2% tolerance, consistent with the "C" suffix designation in Microsemi's nomenclature and verified in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies at 250 mA test current and 25 °C ambient temperature, and is maintained across the full -65 °C to +175 °C junction temperature range due to its specified -0.075 %/°C temperature coefficient.
Is JAN1N4618-1 suitable for surface-mount assembly?
No, JAN1N4618-1 uses a DO-35 (DO-204AH) axial-leaded glass package and is not compatible with surface-mount reflow processes. For SMT equivalents, consider 1N4618UR-1 in DO-213AA package. The JAN1N4618-1 requires through-hole mounting with 10 mm lead length for proper thermal dissipation, as defined in its RθJL = 250 °C/W specification.
What is the maximum Zener current IZM for JAN1N4618-1?
The maximum Zener current IZM for JAN1N4618-1 is 90.0 mA, as listed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This value corresponds to the 500 mW power rating derated at 25 °C ambient, and assumes proper lead-to-PCB thermal conduction. Exceeding this current risks thermal runaway due to the device's negative tempco and limited heat dissipation capability.
Does JAN1N4618-1 meet RoHS requirements?
JAN1N4618-1 is not RoHS compliant, as RoHS versions (e3 suffix) are available only for commercial-grade variants (e.g., 1N4618-1e3), not JAN-level parts. The JAN1N4618-1 uses traditional tin-lead plating per MIL-STD-750 Method 2026 and is intended for applications where military specifications supersede environmental directives.
How does the noise performance of JAN1N4618-1 compare to higher-voltage Zeners?
JAN1N4618-1 delivers 1 μV/√Hz noise density at 250 mA, significantly lower than 6.8 V+ Zeners (which reach 40 μV/√Hz). This ultra-low noise stems from its low-voltage Zener mechanism and metallurgical bond construction, making JAN1N4618-1 especially valuable in precision analog circuits where reference noise directly impacts measurement resolution and SNR.
JAN1N4618-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1500 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 1 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)
JAN1N4618-1 FAQ
1.How can I place an order for JAN1N4618-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4618-1 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 JAN1N4618-1 reliable?
The price and inventory of JAN1N4618-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4618-1 is usually 5 days.
3.What payment methods are accepted for JAN1N4618-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4618-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4618-1?
JAN1N4618-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4618-1 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 JAN1N4618-1?
For technical support, including JAN1N4618-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4618-1 requirements.
6.How does Aetrix verify that JAN1N4618-1 is sourced from the original manufacturer or authorized distributors?
All JAN1N4618-1 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 JAN1N4618-1 meets industry standards.
7.What is the process for return or replacement of JAN1N4618-1?
All JAN1N4618-1 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4618-1, 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 JAN1N4618-1 part is unused and in its original packaging.
Return procedure for JAN1N4618-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4618-1 Tags
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