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Microchip Technology JAN1N4624-1
- Part No.:
- JAN1N4624-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
JAN1N4624-1.pdf
- Description:
- DIODE ZENER 4.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,210
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Product details
Overview
JAN1N4624-1 from Microsemi is a 500 mW, 4.7 V ±5% metallurgically bonded glass Zener diode in DO-35 package, qualified to JAN level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.
For engineers reviewing the JAN1N4624-1 datasheet, JAN1N4624-1 pinout, JAN1N4624-1 application, or JAN1N4624-1 equivalent, key selection criteria include Zener voltage tolerance (±5%), dynamic impedance (1550 Ω at 250 mA), noise density (1 µV/√Hz), temperature coefficient (–0.050,+0.020 %/°C), and JANS-qualified variants for radiation-hardened systems.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable 4.7 V regulation across current (250 mA test point) and temperature (–65 to +175 °C). Its internal metallurgical bond ensures mechanical robustness under thermal cycling and shock.
Designed for precision reference and low-noise regulation, it delivers 1 µV/√Hz noise density at IZT = 250 mA and exhibits minimal capacitance (typical <2 pF at 4.7 V), supporting high-frequency stability in analog feedback loops and voltage references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.7 V ±5% at 250 mA - defines nominal regulation point with tight tolerance for reference accuracy |
| Power Dissipation | 500 mW @ TC = 25 °C - supports continuous regulation in compact axial-leaded layouts |
| Dynamic Impedance ZZT | 1550 Ω at 250 mA - determines output voltage variation under load transients |
| Noise Density | 1 µV/√Hz at 250 mA - enables low-noise performance in precision analog references |
| Temp Coefficient αVZ | –0.050,+0.020 %/°C - specifies voltage drift direction and magnitude over temperature |
| Max Reverse Current IR | 3.0 µA @ 3.0 V - defines leakage threshold before regulation onset |
| Junction Temp Range | –65 to +175 °C - qualifies operation in extreme environmental conditions |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode band marking; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; current flows into anode during Zener conduction |
| Cathode | Regulated output terminal | Banded end; held at stable 4.7 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Ensures mechanical integrity and long-term reliability under thermal stress and vibration |
| MIL-PRF-19500/435 qualification | Validated for JAN-level screening including burn-in, temperature cycling, and hermeticity testing |
| Low noise density | 1 µV/√Hz enables use in high-precision voltage references without added filtering |
| Hermetic glass encapsulation | Prevents moisture ingress and parameter drift in humid or corrosive environments |
| ESD immunity | Non-sensitive per MIL-STD-750 method 1020 - eliminates need for external ESD protection |
Applications
| Avionics Power Reference | Satellite DC-DC Converter Feedback |
|---|---|
Use Scenario: Stable 4.7 V reference in triple-redundant power supply monitoring circuits on flight control computers. IC Role / Device Role / Timing Role: Zener diode provides primary voltage reference for error amplifiers in isolated DC-DC regulators. Use Value: ±5% tolerance and –65 to +175 °C operation ensure regulation accuracy across launch vibration and orbital thermal extremes. | Use Scenario: Feedback node clamping in radiation-tolerant 28 V to 5 V buck converter for onboard telemetry subsystems. IC Role / Device Role / Timing Role: Zener diode sets upper clamp on optocoupler feedback path to prevent overvoltage during transient events. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in LEO missions. |
| Ground Vehicle Engine Control Unit | Tactical Radio Bias Supply |
Use Scenario: 12 V battery-supplied ECU sub-regulator generating clean 4.7 V for microcontroller ADC reference. IC Role / Device Role / Timing Role: Zener diode stabilizes reference rail against load dump spikes and cold-crank voltage sags. Use Value: 500 mW rating and 1550 Ω dynamic impedance limit output deviation to <10 mV under 100 mA step loads. | Use Scenario: Local bias generation for RF front-end LNAs in manpack radios operating from 15 V nominal battery. IC Role / Device Role / Timing Role: Zener diode supplies low-noise 4.7 V bias to GaAs FET amplifier stages. Use Value: 1 µV/√Hz noise density prevents degradation of receiver NF below –110 dBm sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTX1N4624-1 | Same electrical specs; qualified to JANTX level with extended screening (e.g., 100% lot acceptance tests) | Required for programs specifying JANTX reliability level; higher cost and longer lead time | Select when full JANTX screening documentation and traceability are mandated by system spec |
| 1N4624UR-1 | Same Zener voltage and tolerance; surface-mount DO-213AA package instead of axial DO-35 | Used where automated SMT assembly and board space reduction are priorities over through-hole ruggedness | Select for high-volume PCB production requiring reflow compatibility and smaller footprint |
Compared with JAN1N4624-1, JANTX1N4624-1 offers enhanced screening for mission-critical avionics, while 1N4624UR-1 trades axial-leaded mechanical robustness for SMT manufacturability-neither is pin-compatible due to differing packages.
Availability
JAN1N4624-1 is available at Aetrix Electronics and suitable for avionics power references, satellite DC-DC converter feedback, and ground vehicle engine control units requiring stable component supply with full MIL-spec traceability.
Supply support for JAN1N4624-1 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 semiconductors for aerospace, defense, and industrial markets, with expertise in radiation-hardened and mil-qualified components.
The JAN1N4624-1 belongs to Microsemi's legacy 1N46xx-1 series of metallurgically bonded Zener diodes, engineered specifically for voltage regulation in harsh-environment military and space systems.
FAQ
What is the Zener voltage tolerance for JAN1N4624-1?
JAN1N4624-1 has a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%, as defined in the JEDEC-registered specification and verified per MIL-PRF-19500/435 screening. This tolerance applies at 250 mA test current and 25 °C ambient temperature.
Is JAN1N4624-1 suitable for radiation-hardened applications?
Yes, JAN1N4624-1 is inherently radiation hard as documented in Microsemi MicroNote 050. Its metallurgically bonded glass construction and DO-35 hermetic package provide proven resilience to total ionizing dose (TID) and single-event effects in space environments.
What is the maximum power dissipation of JAN1N4624-1 at 75 °C ambient?
At 75 °C ambient, JAN1N4624-1 must be linearly derated from 500 mW starting at 50 °C per the datasheet curve. Derating slope is 5 mW/°C, so at 75 °C ambient, maximum allowable power is 375 mW (500 mW – 25 °C × 5 mW/°C).
Does JAN1N4624-1 have RoHS-compliant plating?
No - JAN1N4624-1 uses traditional tin-lead plating per MIL-STD-750 method 2026. RoHS-compliant matte-tin plating is only available on commercial-grade versions (e.g., 1N4624-1e3), not JAN-level parts.
What is the dynamic impedance of JAN1N4624-1 and why does it matter?
JAN1N4624-1 has a maximum dynamic impedance ZZT of 1550 Ω at 250 mA. This value quantifies how much the output voltage changes under varying load current - lower impedance yields tighter regulation, critical for maintaining reference accuracy in feedback loops.
JAN1N4624-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1550 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/435
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
JAN1N4624-1 FAQ
1.How can I place an order for JAN1N4624-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4624-1 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 JAN1N4624-1 reliable?
The price and inventory of JAN1N4624-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4624-1 is usually 5 days.
3.What payment methods are accepted for JAN1N4624-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4624-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4624-1?
JAN1N4624-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4624-1 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 JAN1N4624-1?
For technical support, including JAN1N4624-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4624-1 requirements.
6.How does Aetrix verify that JAN1N4624-1 is sourced from the original manufacturer or authorized distributors?
All JAN1N4624-1 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 JAN1N4624-1 meets industry standards.
7.What is the process for return or replacement of JAN1N4624-1?
All JAN1N4624-1 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4624-1, 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 JAN1N4624-1 part is unused and in its original packaging.
Return procedure for JAN1N4624-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4624-1 Tags
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