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Microchip Technology 1N4619-1/TR
- Part No.:
- 1N4619-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4619-1/TR.pdf
- Description:
- DIODE ZENER 3V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:6,243
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Product details
Overview
1N4619-1/TR from Microsemi is a 500 mW, 3.0 V ±5% metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTXV level per MIL-PRF-19500/435. It delivers stable voltage regulation at 250 mA test current with 1600 Ω dynamic impedance and operates across –65 °C to +175 °C junction temperature range. Used in precision reference and power supply feedback circuits requiring high-reliability, low-noise regulation.
For engineers reviewing the 1N4619-1/TR datasheet, 1N4619-1/TR pinout, 1N4619-1/TR application, or 1N4619-1/TR equivalent, key selection criteria include Zener voltage tolerance (±5%), noise density (1 µV/√Hz), thermal resistance (250 °C/W junction-to-lead), and MIL-qualified reliability level - all critical for aerospace, defense, and industrial control designs.
Technical Context
This device functions as a two-terminal reverse-biased voltage reference, operating in Zener breakdown mode with a nominal 3.0 V regulation point at 250 mA. Its internal metallurgical bond ensures mechanical robustness and long-term stability under thermal cycling and radiation exposure.
The 1N4619-1/TR exhibits a negative temperature coefficient of –0.075 %/°C and maintains ≤0.4 µA reverse leakage at VR = 1.0 V. Its 1600 Ω dynamic impedance at IZT = 250 mA defines regulation accuracy under load transients, while minimal capacitance (<2 pF typical) supports high-frequency stability in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.0 V ±5% at 250 mA - sets precise reference level for feedback loops and analog circuit biasing |
| Power Dissipation | 500 mW at 25 °C - supports continuous operation in compact through-hole layouts with linear derating above 50 °C |
| Dynamic Impedance ZZT | 1600 Ω at 250 mA - determines output voltage deviation under load current variation |
| Noise Density | 1 µV/√Hz - enables low-noise performance in precision instrumentation and ADC reference applications |
| Junction Temperature Range | –65 °C to +175 °C - allows deployment in extreme environments including avionics and downhole electronics |
| Reverse Leakage IR | ≤0.4 µA at 1.0 V - ensures minimal quiescent current in standby or battery-powered circuits |
| Thermal Resistance RθJL | 250 °C/W (3/8″ lead length) - defines maximum allowable power before thermal runaway in lead-mounted configurations |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode band marking; hermetically sealed, tin-lead or RoHS-compliant matte-tin plating; weight ≈0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse voltage applied between cathode and anode to enable regulation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; supplies regulated 3.0 V when reverse-biased; must be held at higher potential than anode during operation |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level screening ensures proven reliability for mission-critical aerospace and defense systems |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal shock and vibration, extending service life in harsh environments |
| Low noise density | 1 µV/√Hz at 3.0 V enables use in high-resolution data acquisition and sensor signal conditioning without added filtering |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter drift over decades, supporting long-lifecycle embedded deployments |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling and eliminates need for ESD protection circuitry |
Applications
| Avionics Power Monitoring | Industrial PLC Analog Input |
|---|---|
Use Scenario: Monitoring 28 V aircraft bus voltage via resistive divider into ADC input. IC Role / Device Role / Timing Role: Precision 3.0 V reference for ADC full-scale calibration and ratiometric measurement. Use Value: Stable 3.0 V reference ensures <±0.5 LSB error over –55 °C to +125 °C ambient, meeting DO-160 Section 22 requirements. | Use Scenario: Providing isolated reference for 4–20 mA loop receiver circuitry in factory automation controllers. IC Role / Device Role / Timing Role: Zener-regulated reference source for op-amp-based current-to-voltage conversion stage. Use Value: Low 1 µV/√Hz noise prevents signal corruption in 16-bit analog inputs; JANTXV qualification guarantees field longevity beyond 15 years. |
| Satellite Onboard Telemetry | Military Radio RF Bias Supply |
Use Scenario: Generating stable bias for radiation-hardened telemetry sensor front-ends in LEO satellites. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference for sensor excitation and signal chain gain setting. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or redundancy, reducing SWaP-C. | Use Scenario: Setting gate bias for GaN RF power amplifiers in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: Low-capacitance (≈1.5 pF) Zener clamp regulating amplifier bias rail against transient spikes. Use Value: Minimal capacitance avoids RF detuning; DO-35 axial leads allow direct chassis grounding for EMI suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4619US-1 | Same electrical specs but in DO-213AA surface-mount package; no axial leads | Requires PCB rework for SMT assembly; unsuitable for prototyping or through-hole legacy boards | Select when automated assembly, space constraints, or thermal pad integration are prioritized over manual repairability |
| 1N4729A | 3.6 V nominal Zener voltage; ±5% tolerance; 1 W rating; DO-41 package; no MIL qualification | Lacks JANTXV screening and radiation hardness; higher voltage shifts reference design points | Choose only for commercial-grade, non-safety-critical applications where cost and availability outweigh reliability requirements |
Compared with 1N4619US-1 and 1N4729A, the 1N4619-1/TR uniquely combines MIL-qualified reliability, low-noise 3.0 V regulation, and axial-leaded DO-35 form factor - making it irreplaceable in flight-critical analog references where traceability, radiation tolerance, and thermal stability are non-negotiable.
Availability
1N4619-1/TR is available at Aetrix Electronics and suitable for avionics power monitoring, industrial PLC analog input, satellite telemetry, and military radio RF bias supply requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4619-1/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 aerospace-grade components.
The 1N4619-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage reference and regulation in defense electronics, space systems, and safety-critical industrial controls.
FAQ
What is the Zener voltage tolerance for the 1N4619-1/TR?
The 1N4619-1/TR has a nominal Zener voltage of 3.0 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 at 250 mA test current and 25 °C ambient.
Is the 1N4619-1/TR suitable for high-reliability aerospace applications?
Yes, the 1N4619-1/TR is qualified to JANTXV level per MIL-PRF-19500/435, with full screening including temperature cycling, burn-in, and parametric testing. Its metallurgically bonded construction and hermetic DO-35 package make it suitable for flight hardware, satellite subsystems, and other aerospace applications demanding proven reliability.
What is the maximum reverse leakage current for the 1N4619-1/TR?
The 1N4619-1/TR specifies a maximum reverse leakage current (IR) of 0.4 µA at VR = 1.0 V, as stated in the Electrical Characteristics table. This low leakage supports energy-efficient operation in battery-backed or low-power monitoring circuits without compromising regulation accuracy.
Does the 1N4619-1/TR have radiation hardness certification?
Yes, the 1N4619-1/TR is inherently radiation hard, as documented in Microsemi MicroNote 050. Its glass-encapsulated, metallurgically bonded structure provides tolerance to total ionizing dose (TID) and single-event effects (SEE), enabling use in LEO and GEO satellite telemetry without additional shielding.
What does the "TR" suffix indicate in 1N4619-1/TR?
The "TR" suffix denotes tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. The base part 1N4619-1 remains electrically and mechanically identical; only the packaging format changes - no derating or performance impact is associated with the TR variant.
1N4619-1/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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1600 Ohms
- Current - Reverse Leakage @ Vr:
- 400 nA @ 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
1N4619-1/TR FAQ
1.How can I place an order for 1N4619-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4619-1/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 1N4619-1/TR reliable?
The price and inventory of 1N4619-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4619-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4619-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4619-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4619-1/TR?
1N4619-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4619-1/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 1N4619-1/TR?
For technical support, including 1N4619-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4619-1/TR requirements.
6.How does Aetrix verify that 1N4619-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4619-1/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 1N4619-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4619-1/TR?
All 1N4619-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4619-1/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 1N4619-1/TR part is unused and in its original packaging.
Return procedure for 1N4619-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4619-1/TR Tags
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