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Microchip Technology 1N4626-1
- Part No.:
- 1N4626-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4626-1.pdf
- Description:
- DIODE ZENER 5.6V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:5,657
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Product details
Overview
1N4626-1 from Microsemi is a 500 mW, 5.6 V metallurgically bonded glass Zener diode in DO-35 (DO-204AH) package, qualified to JANTXV level per MIL-PRF-19500/435, with ±5% voltage tolerance, 1400 Ω dynamic impedance at 250 mA, and max noise density of 4 μV/√Hz - used for precision voltage reference and regulation in military-grade power supplies.
For engineers reviewing the 1N4626-1 datasheet, 1N4626-1 pinout, 1N4626-1 application, or 1N4626-1 equivalent, key selection criteria include Zener voltage stability over temperature (±0.020%/°C), low leakage (≤5.0 μA at 4.0 V), radiation hardness, hermetic glass sealing, and compliance with MIL-PRF-19500/435 reliability levels.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, relying on metallurgical bonding for thermal stability and low noise performance. Its 5.6 V nominal Zener voltage is specified at 250 mA test current (IZT), with dynamic impedance measured at 10% AC modulation superimposed on IZT.
The device exhibits a dual-signature temperature coefficient (–0.020/+0.040 %/°C), enabling stable regulation across –65 °C to +175 °C junction temperature range. Derating begins linearly at 50 °C lead temperature, reaching zero dissipation at 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.6 V at 250 mA - defines precise regulation point for feedback loops and reference circuits |
| Power Dissipation | 500 mW at 25 °C - supports stable operation in compact, unheatsinked designs with derating above 50 °C |
| Zener Impedance ZZT | 1400 Ω at 250 mA - indicates moderate AC impedance affecting regulation accuracy under varying load |
| Noise Density | 4 μV/√Hz at 250 mA - enables low-noise reference use in analog signal chains and precision instrumentation |
| Reverse Leakage IR | ≤5.0 μA at 4.0 V - ensures minimal error current in high-impedance bias networks |
| Temp Coefficient αVZ | –0.020/+0.040 %/°C - provides predictable drift behavior for temperature-compensated references |
| Junction Temp Range | –65 to +175 °C - supports operation in extended-environment aerospace and defense systems |
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 | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-biased regulation |
| Cathode (banded end) | Zener regulation terminal | Applied to regulated output node; must be held positive relative to anode for breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables stable thermal resistance (250 °C/W junction-to-lead) and long-term parameter consistency under thermal cycling |
| MIL-PRF-19500/435 qualification | Validated reliability up to JANTXV level - required for flight-critical and high-reliability defense electronics |
| Low noise density | 4 μV/√Hz at 5.6 V supports use in precision ADC references and low-drift op-amp biasing |
| Hermetic glass encapsulation | Prevents moisture ingress and parametric shift in humid or corrosive environments (e.g., avionics bays) |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-qualified subsystems without shielding |
Applications
| Avionics Power Reference | Military Radar Bias Supply |
|---|---|
Use Scenario: Providing stable 5.6 V reference for analog-to-digital converters in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Zener diode operating as shunt voltage reference in high-accuracy sensor signal conditioning chain. Use Value: Low 4 μV/√Hz noise and ±0.020/+0.040 %/°C tempco ensure <0.5 LSB error over –40 to +85 °C operating range. | Use Scenario: Regulating gate bias voltage for GaN RF power amplifiers in airborne radar transmitters. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed bias point despite supply ripple and thermal transients. Use Value: JANTXV qualification and –65 to +175 °C operation guarantee reliability during rapid thermal cycling in pulsed radar duty cycles. |
| Satellite Onboard Computer PSU | Nuclear Test Instrumentation |
Use Scenario: Generating isolated 5.6 V reference for FPGA configuration memory voltage supervisors in LEO satellites. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference ensuring startup integrity after single-event effects. Use Value: Inherent radiation tolerance eliminates need for redundant regulators or shielding mass - critical for SWaP-constrained payloads. | Use Scenario: Calibrating high-voltage pulse generators in nuclear diagnostics equipment requiring traceable DC references. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade calibration fixtures. Use Value: Hermetic DO-35 package and MIL-qualified process ensure long-term calibration stability (<10 ppm/year drift). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4626UR-1 | Same electrical specs, but in DO-213AA surface-mount package - no axial leads | Required for automated SMT assembly; unsuitable for through-hole prototyping or manual repair | Select when board space is constrained and reflow compatibility is mandatory |
| 1N5232B | 5.6 V, 500 mW, ±5%, but commercial-grade only; no MIL qualification; higher ZZT (1700 Ω) | Lacks JANTXV reliability testing and radiation hardness - limited to non-critical industrial use | Select only for cost-sensitive, non-mission-critical applications where MIL spec is not mandated |
Compared with 1N4626UR-1, the 1N4626-1 enables manual assembly and field repair via axial leads; compared with 1N5232B, it delivers verified radiation tolerance, tighter thermal stability, and guaranteed performance across military environmental profiles.
Availability
1N4626-1 is available at Aetrix Electronics and suitable for avionics power reference, military radar bias supply, and satellite onboard computer PSU requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4626-1 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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N4626-1 belongs to Microsemi's legacy MIL-PRF-19500/435 qualified Zener diode family, engineered for voltage regulation in mission-critical defense, space, and nuclear instrumentation systems.
FAQ
What is the Zener voltage tolerance for the 1N4626-1?
The 1N4626-1 has a nominal Zener voltage of 5.6 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. No tighter tolerance (e.g., 2% or 1%) is assigned to this specific part number suffix.
Is the 1N4626-1 RoHS compliant?
The 1N4626-1 is not RoHS compliant by default; RoHS-compliant versions carry the "e3" suffix (e.g., 1N4626-1e3) and are available only in commercial-grade variants. The base 1N4626-1 retains traditional tin-lead plating per MIL-STD-750.
What is the maximum reverse leakage current for the 1N4626-1?
The 1N4626-1 has a maximum reverse leakage current (IR) of 5.0 μA at 4.0 V, as specified in the Electrical Characteristics table. This value is measured at 25 °C ambient and reflects worst-case leakage before breakdown onset.
Does the 1N4626-1 require heatsinking in typical operation?
No heatsink is required for the 1N4626-1 at ≤500 mW dissipation below 50 °C lead temperature. Thermal resistance is 250 °C/W junction-to-lead (with 3/8″ lead length), and linear derating begins at 50 °C - full power is usable up to that point on standard FR4 PCBs with minimal copper area.
What does the "-1" suffix indicate in 1N4626-1?
The "-1" suffix in 1N4626-1 denotes compliance with Microsemi's internal product revision control and indicates qualification to MIL-PRF-19500/435 requirements. It distinguishes this qualified version from non-qualified commercial variants and confirms adherence to the T4-LDS-0245-2 specification.
1N4626-1 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):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1400 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5.2 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
1N4626-1 FAQ
1.How can I place an order for 1N4626-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4626-1 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 1N4626-1 reliable?
The price and inventory of 1N4626-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4626-1 is usually 5 days.
3.What payment methods are accepted for 1N4626-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4626-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4626-1?
1N4626-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4626-1 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 1N4626-1?
For technical support, including 1N4626-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4626-1 requirements.
6.How does Aetrix verify that 1N4626-1 is sourced from the original manufacturer or authorized distributors?
All 1N4626-1 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 1N4626-1 meets industry standards.
7.What is the process for return or replacement of 1N4626-1?
All 1N4626-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4626-1, 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 1N4626-1 part is unused and in its original packaging.
Return procedure for 1N4626-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4626-1 Tags
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