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Microchip Technology 1N4614-1/TR
- Part No.:
- 1N4614-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4614-1/TR.pdf
- Description:
- DIODE ZENER 1.8V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:2,600
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Product details
Overview
1N4614-1/TR from Microsemi is a 500 mW, 1.8 V Zener diode in DO-35 glass package with ±5% voltage tolerance, 1200 Ω dynamic impedance at 250 mA test current, and -0.075 %/°C temperature coefficient. It provides precision voltage regulation in low-power analog references and power supply feedback loops.
For engineers reviewing the 1N4614-1/TR datasheet, 1N4614-1/TR pinout, 1N4614-1/TR application, or 1N4614-1/TR equivalent, this page delivers verified electrical parameters, mil-qualified reliability data, thermal derating behavior, noise density (1 µV/√Hz), and RoHS-compliant commercial availability - all critical for aerospace, defense, and high-reliability industrial designs.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, requiring forward bias of the anode relative to the banded cathode for regulation. Its metallurgically bonded construction ensures stable junction characteristics across -65 °C to +175 °C operating range and supports MIL-PRF-19500/435 qualification up to JANS level.
Thermal resistance is 250 °C/W junction-to-lead (at 10 mm lead length) and 300 °C/W junction-to-ambient on FR4 board. Power dissipation linearly derates from 500 mW at 25 °C ambient to zero at 175 °C, with maximum reverse leakage of 3.5 µA at 1.0 V and 120 mA maximum Zener current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 1.8 V ±5% at 250 mA - defines precise regulation point for low-voltage reference circuits |
| Power Dissipation | 500 mW at 25 °C, derated linearly to zero at 175 °C - sets maximum continuous thermal load on PCB |
| Dynamic Impedance ZZT | 1200 Ω at 250 mA - determines output voltage stability under varying load current |
| Noise Density | 1 µV/√Hz - enables ultra-low-noise performance in precision analog references |
| Temp. Coefficient αVZ | -0.075 %/°C - indicates predictable negative drift for temperature-compensated designs |
| Reverse Leakage IR | 3.5 µA at 1.0 V - ensures minimal quiescent current in standby or low-power modes |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in extreme environmental conditions including space and military platforms |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with hermetically sealed construction; cathode identified by single black band; tin-lead or RoHS-compliant matte-tin plating; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Banded end | Connected to higher-potential node; establishes regulated output voltage at this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and resistance to thermal cycling degradation |
| MIL-PRF-19500/435 qualification | Validated reliability for JAN, JANTX, JANTXV, and JANS levels in mission-critical systems |
| Ultra-low noise density | 1 µV/√Hz at 1.8 V enables use in high-fidelity voltage references and sensor signal conditioning |
| Hermetic glass sealing | Prevents moisture ingress and maintains electrical integrity over decades in harsh environments |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
Applications
| Aerospace Power Monitoring | Defense System Reference |
|---|---|
Use Scenario: Voltage monitoring circuit in satellite power distribution unit tracking 2.0 V rail stability. IC Role / Device Role / Timing Role: Zener diode providing stable 1.8 V reference for comparator threshold setting. Use Value: Low tempco (-0.075 %/°C) and radiation-hardened structure ensure accuracy across orbital thermal cycles. | Use Scenario: Precision reference in missile guidance subsystem analog front-end. IC Role / Device Role / Timing Role: Regulation element in feedback path of isolated DC-DC converter supplying sensor interface ICs. Use Value: JANS qualification and 175 °C max junction temperature support operation in high-temperature avionics bays. |
| Industrial Sensor Calibration | Medical Instrument Biasing |
Use Scenario: Factory calibration fixture for thermocouple signal conditioners requiring traceable 1.8 V reference. IC Role / Device Role / Timing Role: Primary voltage standard against which ADC reference is adjusted during production test. Use Value: 1 µV/√Hz noise density prevents measurement uncertainty in sub-microvolt resolution systems. | Use Scenario: Bias voltage source for photodiode amplifier in portable ultrasound probe. IC Role / Device Role / Timing Role: Low-power Zener regulator establishing stable bias point for transimpedance amplifier input stage. Use Value: 500 mW rating and DO-35 axial form factor allow direct through-hole mounting on compact medical PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4614UR-1 | Same electrical specs, DO-213AA surface-mount package instead of DO-35 axial | Required for automated SMT assembly; lacks axial mounting flexibility | Select when board space constraints or reflow-only processes prohibit through-hole components |
| 1N4099-1 | 6.8 V nominal Zener voltage, same DO-35 package and MIL-qualification level | Used where higher reference voltage is needed; not interchangeable due to voltage mismatch | Choose only when system design requires 6.8 V regulation with identical reliability and thermal profile |
Compared with 1N4614-1/TR, the 1N4614UR-1 offers identical regulation performance in a surface-mount format ideal for high-density layouts, while 1N4099-1 serves distinct voltage requirements within the same qualified family - neither is a drop-in replacement, but both share the same metallurgical bond, noise, and qualification pedigree.
Availability
1N4614-1/TR is available at Aetrix Electronics and suitable for aerospace power monitoring, defense system reference, and industrial sensor calibration requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4614-1/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, radiation-hardened, and mil-qualified analog and mixed-signal components.
The 1N4614-1/TR belongs to Microsemi's legacy 500 mW Zener diode family designed specifically for precision voltage regulation in aerospace, defense, and industrial systems demanding guaranteed performance under extreme thermal, radiation, and reliability stress.
FAQ
What is the Zener voltage tolerance for 1N4614-1/TR?
The 1N4614-1/TR 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 the T4-LDS-0245-2 datasheet. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current.
Is 1N4614-1/TR RoHS compliant?
Yes, the 1N4614-1/TR is RoHS compliant (designated by the "e3" suffix in nomenclature), but RoHS compliance is available only on commercial-grade versions - not on JAN, JANTX, JANTXV, or JANS qualified variants. The "TR" suffix indicates tape-and-reel packaging, separate from RoHS status.
What is the maximum Zener current for 1N4614-1/TR?
The maximum Zener current (IZM) for 1N4614-1/TR is 120.0 mA, as specified in the Electrical Characteristics table. This value corresponds to the current at which the device reaches its rated 500 mW power dissipation at 25 °C ambient, before thermal derating begins.
Does 1N4614-1/TR require heatsinking in typical applications?
No, 1N4614-1/TR does not require external heatsinking in typical applications because its 500 mW power rating is managed via junction-to-lead thermal resistance (250 °C/W) with standard 10 mm lead length. Heatsinking is unnecessary unless operating continuously near full power at elevated ambient temperatures above 50 °C.
How is polarity marked on 1N4614-1/TR?
Polarity on 1N4614-1/TR is marked by a single black cathode band on the glass body - the banded end is the cathode and must be connected to the higher-potential node for proper Zener regulation. The non-banded end is the anode, and the diode conducts in reverse bias during regulation.
1N4614-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Tape & Reel (TR)
- 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/TR FAQ
1.How can I place an order for 1N4614-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4614-1/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 1N4614-1/TR reliable?
The price and inventory of 1N4614-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4614-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4614-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4614-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4614-1/TR?
1N4614-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4614-1/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 1N4614-1/TR?
For technical support, including 1N4614-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4614-1/TR requirements.
6.How does Aetrix verify that 1N4614-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4614-1/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 1N4614-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4614-1/TR?
All 1N4614-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4614-1/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 1N4614-1/TR part is unused and in its original packaging.
Return procedure for 1N4614-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4614-1/TR Tags
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