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Microchip Technology 1N4617-1
- Part No.:
- 1N4617-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4617-1.pdf
- Description:
- DIODE ZENER 2.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
1N4617-1 from Microsemi is a 500 mW, 2.4 V Zener diode in DO-35 glass package, qualified to JANS level per MIL-PRF-19500/435, with 250 mA test current, 1400 Ω dynamic impedance, and -0.075 %/°C temperature coefficient. It delivers stable voltage regulation in high-reliability aerospace and military power supply circuits.
For engineers reviewing the 1N4617-1 datasheet, 1N4617-1 pinout, 1N4617-1 application, or 1N4617-1 equivalent, this page provides verified Zener voltage, noise density, thermal resistance, derating behavior, and mil-spec qualification details essential for radiation-hardened, low-noise, and temperature-stable reference design.
Technical Context
The 1N4617-1 operates as a precision voltage reference in reverse-biased breakdown mode, with Zener voltage specified at 2.4 V ±5% (standard tolerance) under 250 mA test current. Its metallurgically bonded construction ensures low leakage (<1.0 µA at 1.0 V reverse), minimal capacitance (~1 pF typical), and inherent radiation hardness per MicroNote 050.
It exhibits a negative temperature coefficient of -0.075 %/°C, enabling predictable drift compensation in analog references. Thermal resistance junction-to-lead is 250 °C/W at 10 mm lead length, supporting stable operation up to +175 °C junction temperature when properly heatsunk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V at 250 mA - defines precise regulation point for low-voltage reference circuits |
| Power Dissipation | 500 mW at 25 °C - supports continuous regulation in compact axial-leaded layouts |
| Dynamic Impedance (ZZT) | 1400 Ω at 250 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | ≤1.0 µA at 1.0 V - ensures minimal error current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | -0.075 %/°C - enables predictable voltage drift compensation across -65 to +175 °C |
| Noise Density (ND) | 1 µV/√Hz - critical for low-noise analog references and precision instrumentation |
| Junction Temp. Range | -65 to +175 °C - validated for extended-range operation in space and defense systems |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package. Cathode indicated by band; device operated with banded end positive for Zener regulation. Approximate weight: 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current |
| Cathode | Regulated output node | Banded end supplies stable 2.4 V reference; must be biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock |
| MIL-PRF-19500/435 qualification | Validated reliability for JAN, JANTX, JANTXV, and JANS levels in mission-critical systems |
| Low noise density | 1 µV/√Hz enables use in precision ADC references and sensor excitation circuits |
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in harsh environmental conditions |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID), per Microsemi MicroNote 050 |
Applications
| Avionics Power Reference | Satellite Voltage Monitor |
|---|---|
Use Scenario: Provides stable 2.4 V reference for ADCs monitoring DC bus voltage in flight control power modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage. Use Value: -0.075 %/°C tempco and 1 µV/√Hz noise ensure <±0.5% accuracy over -55 to +125 °C operational range. | Use Scenario: Serves as primary voltage threshold detector in satellite EPS battery management during eclipse phases. IC Role / Device Role / Timing Role: Precision shunt regulator establishing trip point for undervoltage lockout circuitry. Use Value: JANS qualification and radiation hardness guarantee functional integrity after 100 krad(Si) TID exposure. |
| Missile Guidance Bias Network | Nuclear Instrumentation Reference |
Use Scenario: Supplies bias voltage to op-amps in inertial measurement unit (IMU) signal conditioning stages. IC Role / Device Role / Timing Role: Low-capacitance (≈1 pF) Zener reference minimizing phase shift in high-frequency analog paths. Use Value: 1400 Ω dynamic impedance maintains regulation stability despite rapid current transients from sensor amplifiers. | Use Scenario: Functions as calibration reference in portable radiation survey meters requiring traceable voltage standards. IC Role / Device Role / Timing Role: Hermetically sealed shunt regulator delivering metrology-grade stability over 10+ year field deployment. Use Value: DO-35 glass package and metallurgical bond ensure zero parametric drift under continuous gamma irradiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4617UR-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 axial | Requires PCB rework for SMT assembly; no through-hole compatibility | Select for automated production where board space and reflow compatibility are prioritized |
| 1N5221B | 2.4 V, 500 mW, but only commercial-grade (no MIL-PRF-19500 qualification); 1000 Ω ZZT | Lacks radiation hardness, tempco (-0.05 %/°C), and JANS-level screening | Select only for non-mission-critical industrial prototypes with cost-sensitive BOMs |
Compared with 1N4617UR-1 and 1N5221B, the 1N4617-1 uniquely combines mil-spec qualification, radiation tolerance, and -0.075 %/°C tempco in a hermetic DO-35 package-making it irreplaceable for flight-certified and nuclear-grade reference designs where long-term parametric stability is non-negotiable.
Availability
1N4617-1 is available at Aetrix Electronics and suitable for avionics power reference, satellite voltage monitor, missile guidance bias network, and nuclear instrumentation reference requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N4617-1 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4617-1 belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for voltage reference and regulation in radiation-intensive, thermally extreme, and long-lifecycle systems.
FAQ
What is the Zener voltage tolerance for 1N4617-1?
The 1N4617-1 has a nominal Zener voltage of 2.4 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification. This tolerance applies under 250 mA test current at 25 °C ambient. Tighter tolerances (2% or 1%) require alternate suffixes (e.g., "C" or "D") not present in the base 1N4617-1 designation.
Is 1N4617-1 suitable for surface-mount assembly?
No - the 1N4617-1 uses the axial-leaded DO-35 (DO-204AH) glass package and is designed for through-hole mounting. For surface-mount equivalents, Microsemi offers the 1N4617UR-1 in DO-213AA package; the "UR" suffix explicitly denotes the SMT variant of the same electrical characteristics.
What is the maximum reverse leakage current for 1N4617-1?
The 1N4617-1 has a maximum reverse leakage current (IR) of 1.0 µA at 1.0 V reverse voltage, measured at 25 °C. This low leakage supports high-impedance biasing in precision analog circuits without introducing significant error current into the reference node.
Does 1N4617-1 meet RoHS requirements?
The base 1N4617-1 is not RoHS compliant; RoHS-compliant versions carry the "e3" suffix (e.g., 1N4617-1e3) and are available only in commercial-grade variants. Mil-spec versions (JAN/JANTX/JANTXV/JANS) retain tin-lead plating per MIL-STD-750 and are exempt from RoHS compliance.
How does the temperature coefficient affect 1N4617-1 performance?
The 1N4617-1 has a temperature coefficient of -0.075 %/°C, meaning its Zener voltage decreases by approximately 1.8 mV per °C rise above 25 °C. This predictable negative drift allows designers to compensate reference circuits in wide-temperature applications such as avionics and space electronics.
1N4617-1 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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1400 Ohms
- Current - Reverse Leakage @ Vr:
- 1 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
1N4617-1 FAQ
1.How can I place an order for 1N4617-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4617-1 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 1N4617-1 reliable?
The price and inventory of 1N4617-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4617-1 is usually 5 days.
3.What payment methods are accepted for 1N4617-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4617-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4617-1?
1N4617-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4617-1 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 1N4617-1?
For technical support, including 1N4617-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4617-1 requirements.
6.How does Aetrix verify that 1N4617-1 is sourced from the original manufacturer or authorized distributors?
All 1N4617-1 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 1N4617-1 meets industry standards.
7.What is the process for return or replacement of 1N4617-1?
All 1N4617-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4617-1, 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 1N4617-1 part is unused and in its original packaging.
Return procedure for 1N4617-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4617-1 Tags
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