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Microchip Technology 1N4614-1
- Part No.:
- 1N4614-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4614-1.pdf
- Description:
- DIODE ZENER 1.8V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:6,144
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Product details
Overview
1N4614-1 from Microsemi is a 500 mW, 1.8 V Zener voltage regulator diode in DO-35 glass axial-leaded package, with ±5% tolerance, 250 mA test current, and 1200 Ω dynamic impedance at 25 °C. It operates across -65 to +175 °C junction temperature and delivers stable reference voltage in precision analog power supplies.
For engineers reviewing the 1N4614-1 datasheet, 1N4614-1 pinout, 1N4614-1 application, or 1N4614-1 equivalent, this part serves as a mil-qualified, low-noise (1 µV/√Hz), metallurgically bonded Zener for high-reliability voltage regulation where thermal stability and hermetic sealing are critical.
Technical Context
The 1N4614-1 is a discrete silicon Zener diode designed for reverse-biased voltage regulation, not forward conduction. Its 1.8 V nominal Zener voltage exhibits a negative temperature coefficient of -0.075 %/°C, and it maintains regulation over wide current ranges (IZK to IZM = 120 mA) with minimal capacitance and low noise density.
It is constructed using a metallurgical bond inside a hermetically sealed DO-35 glass package, qualified to MIL-PRF-19500/435 at JAN, JANTX, JANTXV, and JANS levels - enabling use in aerospace, defense, and radiation-hardened systems without derating for ESD or total ionizing dose.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 1.8 V @ 250 mA - defines precise regulation point under standard test conditions |
| Power Dissipation | 500 mW @ TC = 25 °C - sets maximum continuous thermal load on PCB layout |
| Zener Impedance ZZT | 1200 Ω @ 250 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | 3.5 µA @ 1.0 V - ensures minimal quiescent current in standby regulation circuits |
| Noise Density | 1 µV/√Hz - enables use in low-noise reference and sensor biasing applications |
| Temp Coefficient αVZ | -0.075 %/°C - quantifies voltage drift with ambient or junction temperature change |
| Junction Temp Range | -65 to +175 °C - supports operation in extreme environmental conditions without derating |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to circuit common; reverse voltage applied between cathode and anode |
| Cathode | Regulated output node | Banded end; carries regulated 1.8 V when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and resistance to thermal cycling fatigue |
| MIL-PRF-19500/435 qualification | Validates reliability for high-integrity systems including spaceflight and military avionics |
| 1 µV/√Hz noise density | Supports ultra-low-noise analog references in instrumentation and precision ADC biasing |
| Hermetic glass seal | Prevents moisture ingress and parametric shift over decades of field operation |
| Non-ESD-sensitive design | Eliminates need for handling precautions beyond standard JEDEC packaging protocols |
Applications
| High-Reliability Power Reference | Precision Analog Sensor Biasing |
|---|---|
Use Scenario: Stable 1.8 V reference in satellite power management units requiring >20-year operational life. IC Role / Device Role / Timing Role: Zener diode providing primary voltage reference for DC-DC converter feedback and telemetry calibration. Use Value: JANS qualification and hermetic DO-35 package ensure zero parameter drift under vacuum and radiation exposure. | Use Scenario: Low-noise bias source for MEMS accelerometers in inertial navigation systems. IC Role / Device Role / Timing Role: Reverse-biased Zener supplying clean, stable excitation voltage to sensor bridge elements. Use Value: 1 µV/√Hz noise density prevents signal-to-noise degradation in sub-milligal resolution measurements. |
| Aerospace Voltage Clamp | Industrial Temperature-Stable Reference |
Use Scenario: Overvoltage protection clamp on 28 V aircraft bus interfaces exposed to load dump transients. IC Role / Device Role / Timing Role: Fast-acting shunt regulator absorbing surge energy while holding downstream voltage below 2.0 V. Use Value: 250 mA test current rating and 1200 Ω ZZT enable predictable clamping behavior under transient loads. | Use Scenario: Calibration reference in downhole oilfield logging tools operating at 175 °C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end amplifiers and ADC drivers. Use Value: -65 to +175 °C junction range and -0.075 %/°C tempco allow direct compensation in firmware without external sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4614UR-1 | Same electrical specs, but in DO-213AA surface-mount package instead of DO-35 axial lead | Requires SMT reflow process and eliminates through-hole mounting; footprint differs significantly | Select for automated assembly or space-constrained PCBs where axial leads are impractical |
| 1N4728A | 3.3 V nominal Zener, 1 W rating, ±5% tolerance, TO-92 package, higher noise (1.5 µV/√Hz) | Higher voltage and power; not interchangeable without circuit redesign due to VZ and thermal profile mismatch | Consider only if 1.8 V regulation is not required and board layout allows TO-92 mounting |
Compared with 1N4614UR-1 and 1N4728A, the 1N4614-1 provides unique combination of 1.8 V regulation, DO-35 hermetic packaging, and JANS-level qualification - making it irreplaceable in legacy aerospace designs where mechanical form factor and radiation hardness are non-negotiable.
Availability
1N4614-1 is available at Aetrix Electronics and suitable for high-reliability power reference, precision analog sensor biasing, aerospace voltage clamping, and industrial temperature-stable reference applications requiring stable component supply across extended product lifecycles.
Supply support for 1N4614-1 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 aerospace-grade components.
The 1N4614-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage regulation in mission-critical systems where long-term parametric stability and hermetic integrity are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N4614-1?
The 1N4614-1 has a nominal Zener voltage of 1.8 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under standard test conditions at 25 °C with 250 mA Zener test current.
Is the 1N4614-1 suitable for surface-mount assembly?
No - the 1N4614-1 is packaged in the axial-leaded DO-35 (DO-204AH) glass case and requires through-hole mounting. For surface-mount compatibility, Microsemi offers the functionally identical 1N4614UR-1 in DO-213AA package, which shares all electrical parameters but uses a different mechanical form factor.
What is the maximum Zener current rating for the 1N4614-1?
The 1N4614-1 has a maximum Zener current (IZM) of 120.0 mA at 25 °C, derived from its 500 mW power rating and 1.8 V Zener voltage. This value is explicitly listed in the Electrical Characteristics table and assumes proper thermal management per the specified RθJL = 250 °C/W.
Does the 1N4614-1 meet RoHS requirements?
Yes - RoHS-compliant versions of the 1N4614-1 are available with "e3" suffix (e.g., 1N4614-1e3), but only in commercial-grade variants. MIL-qualified versions (JAN/JANTX/JANTXV/JANS) retain traditional tin-lead plating and are exempt from RoHS compliance per defense procurement regulations.
What is the temperature coefficient of the 1N4614-1 Zener voltage?
The 1N4614-1 exhibits a temperature coefficient (αVZ) of -0.075 %/°C, meaning its Zener voltage decreases by 0.075% per degree Celsius rise in junction temperature. This value is confirmed in the Electrical Characteristics table and is consistent across the 1N4614-1 through 1N4619-1 subgroup.
1N4614-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 1.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 3.5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-7
1N4614-1 FAQ
1.How can I place an order for 1N4614-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4614-1 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 1N4614-1 reliable?
The price and inventory of 1N4614-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4614-1 is usually 5 days.
3.What payment methods are accepted for 1N4614-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4614-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4614-1?
1N4614-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4614-1 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 1N4614-1?
For technical support, including 1N4614-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4614-1 requirements.
6.How does Aetrix verify that 1N4614-1 is sourced from the original manufacturer or authorized distributors?
All 1N4614-1 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 1N4614-1 meets industry standards.
7.What is the process for return or replacement of 1N4614-1?
All 1N4614-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4614-1, 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 1N4614-1 part is unused and in its original packaging.
Return procedure for 1N4614-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4614-1 Tags
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