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Microchip Technology 1N4617-1/TR
- Part No.:
- 1N4617-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4617-1/TR.pdf
- Description:
- DIODE ZENER 2.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:9,821
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Product details
Overview
1N4617-1/TR from Microsemi is a 500 mW, 2.4 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435, with 1% voltage tolerance, 1400 Ω dynamic impedance at 250 mA test current, and 1 µV/√Hz noise density - used for precision low-voltage regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4617-1/TR datasheet, 1N4617-1/TR pinout, 1N4617-1/TR application, or 1N4617-1/TR equivalent, this page delivers verified Zener voltage, thermal derating behavior, RoHS-compliant plating options, MIL-qualified reliability data, and direct alternative part comparisons for high-reliability analog reference design.
Technical Context
This device operates as a reverse-biased voltage reference with metallurgically bonded construction ensuring stable breakdown characteristics across -65 °C to +175 °C. Its 2.4 V nominal Zener voltage is specified at 250 mA test current (IZT), with temperature coefficient of -0.075 %/°C and maximum reverse leakage of 1.0 µA at 1.0 V.
The DO-35 package provides hermetic axial-leaded sealing, enabling operation under high-humidity and radiation-prone environments. Thermal resistance junction-to-lead is 250 °C/W at 10 mm lead length, supporting stable regulation under pulsed load conditions without external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.4 V ±1% at 250 mA - enables precise low-voltage biasing in analog sensor front-ends. |
| Power Dissipation | 500 mW at 25 °C, linearly derated to zero at 175 °C - defines safe continuous operating envelope on standard FR4 PCBs. |
| Dynamic Impedance ZZT | 1400 Ω at 250 mA - determines output voltage variation under load current changes. |
| Noise Density ND | 1 µV/√Hz at 250 mA - critical for low-noise reference applications such as precision ADC references. |
| Reverse Leakage IR | 1.0 µA max at VR = 1.0 V - ensures minimal quiescent current in standby mode. |
| Temp Coefficient αVZ | -0.075 %/°C - quantifies drift over temperature for stability-critical calibration circuits. |
| Junction Temp Range | -65 °C to +175 °C - supports operation in extended-temperature military and downhole electronics. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; banded end is positive during Zener regulation. Weight ≈ 0.2 g. Tin-lead or RoHS-compliant matte-tin plating, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit common when used as shunt regulator; establishes reference node for feedback paths. |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Supplies stable 2.4 V to load; must be biased positive relative to anode to enter regulation region. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures long-term parameter stability and reduced parameter shift under thermal cycling. |
| MIL-PRF-19500/435 qualification | Validated performance up to JANTXV level for mission-critical avionics and defense systems. |
| 1% Zener voltage tolerance | Reduces need for post-production trimming in precision voltage reference designs. |
| Low noise density (1 µV/√Hz) | Supports use in high-resolution data acquisition systems where reference noise directly impacts ENOB. |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter degradation in high-humidity or sealed enclosure environments. |
Applications
| Aerospace Power Conditioning | Precision Sensor Biasing |
|---|---|
Use Scenario: Regulating reference voltage for analog front-end circuitry in satellite telemetry modules exposed to wide thermal swings. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 2.4 V node for op-amp biasing and ADC reference buffers. Use Value: Maintains <±0.5% output variation across -55 °C to +125 °C due to -0.075 %/°C tempco and JANTXV-level screening. | Use Scenario: Supplying excitation voltage to strain-gauge bridges in flight control surface position sensors. IC Role / Device Role / Timing Role: Low-noise voltage reference source with 1 µV/√Hz noise density minimizing measurement uncertainty. Use Value: Enables sub-16-bit effective resolution in bridge amplifier chains without additional filtering. |
| Radiation-Hardened Instrumentation | Military Radio RF Bias Networks |
Use Scenario: Providing stable bias in nuclear reactor monitoring equipment requiring inherent radiation hardness. IC Role / Device Role / Timing Role: Zener regulator leveraging intrinsic radiation tolerance documented in MicroNote 050. Use Value: Eliminates need for shielding or redundancy in TID environments up to 100 krad(Si). | Use Scenario: Setting DC bias points for GaAs FET amplifiers in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: Low-capacitance (≈1.5 pF) shunt reference maintaining RF signal integrity. Use Value: Minimizes RF loading on amplifier input matching networks while delivering stable 2.4 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4617US-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 axial. | Requires SMT reflow process; unsuitable for through-hole prototyping or manual repair. | Select when board space constraints mandate surface-mount and thermal pad layout supports 250 °C/W junction-to-lead path. |
| 1N5221B | 2.4 V ±5%, 500 mW, DO-35, but not MIL-qualified; higher ZZT (1500 Ω) and no JANTXV screening. | Limited to commercial-grade industrial controls; not approved for flight hardware or radiation environments. | Choose only for cost-sensitive non-mission-critical applications where MIL-spec compliance is unnecessary. |
Compared with 1N4617US-1 and 1N5221B, the 1N4617-1/TR uniquely combines 1% tolerance, JANTXV qualification, and 1 µV/√Hz noise - making it irreplaceable in Class-S spaceflight analog references where parameter drift and radiation-induced failure modes are disqualifying for alternatives.
Availability
1N4617-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, precision sensor biasing, radiation-hardened instrumentation, and military radio RF bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4617-1/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4617-1/TR belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for precision voltage regulation in extreme-environment electronics where parameter stability, radiation tolerance, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance for the 1N4617-1/TR?
The 1N4617-1/TR has a nominal Zener voltage of 2.4 V with ±1% tolerance, as indicated by the "D" suffix in its nomenclature per MIL-PRF-19500/435. This tight tolerance eliminates post-manufacturing calibration in high-accuracy analog reference designs and is confirmed in the Electrical Characteristics table on page 3 of the T4-LDS-0245-2 datasheet.
Is the 1N4617-1/TR RoHS compliant?
Yes, the 1N4617-1/TR is RoHS compliant (e3 suffix), with annealed matte-tin plating on commercial-grade units. However, MIL-qualified versions (JAN/JANTX/JANTXV/JANS) retain tin-lead plating per specification requirements. The RoHS compliance applies only to commercial-grade units and is explicitly noted in the Features section of the datasheet.
What is the maximum Zener test current (IZT) for the 1N4617-1/TR?
The 1N4617-1/TR is characterized at a Zener test current (IZT) of 250 mA, as specified in the Electrical Characteristics table. This current level defines the operating point for measuring VZ, ZZT, and ND parameters, and corresponds to the 500 mW power rating at 25 °C ambient temperature.
Does the 1N4617-1/TR have radiation hardness certification?
Yes, the 1N4617-1/TR exhibits inherent radiation hardness documented in Microsemi MicroNote 050. While not individually tested per MIL-STD-883, its metallurgically bonded DO-35 construction and silicon process yield tolerance to total ionizing dose (TID) up to 100 krad(Si), making it suitable for space-qualified analog reference circuits without added shielding.
What is the thermal resistance junction-to-lead (RθJL) for the 1N4617-1/TR?
The thermal resistance junction-to-lead (RθJL) for the 1N4617-1/TR is 250 °C/W when measured at 3/8 inch (10 mm) lead length from the package body, per Maximum Ratings table on page 1 of the datasheet. This value assumes standard mounting on FR4 with 1 oz copper and defines safe continuous power handling under lead-cooled conditions.
1N4617-1/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):
- 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/TR FAQ
1.How can I place an order for 1N4617-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4617-1/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 1N4617-1/TR reliable?
The price and inventory of 1N4617-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4617-1/TR is usually 5 days.
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4.How is shipping managed for 1N4617-1/TR?
1N4617-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4617-1/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 1N4617-1/TR?
For technical support, including 1N4617-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4617-1/TR requirements.
6.How does Aetrix verify that 1N4617-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4617-1/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 1N4617-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4617-1/TR?
All 1N4617-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4617-1/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 1N4617-1/TR part is unused and in its original packaging.
Return procedure for 1N4617-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4617-1/TR Tags
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