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Microchip Technology 1N4626-1/TR
- Part No.:
- 1N4626-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4626-1/TR.pdf
- Description:
- DIODE ZENER 5.6V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:5,779
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Product details
Overview
1N4626-1/TR from Microsemi is a 500 mW, 5.6 V metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTXV level per MIL-PRF-19500/435, with 5.0 µA max reverse current at 4.0 V, 1400 Ω max dynamic impedance at 250 mA test current, and ±0.020%/°C temperature coefficient - used for precision voltage regulation in military power supplies and analog reference circuits.
For engineers reviewing the 1N4626-1/TR datasheet, 1N4626-1/TR pinout, 1N4626-1/TR application, or 1N4626-1/TR equivalent, key selection criteria include Zener voltage tolerance (5%), noise density (4 µV/√Hz), junction temperature range (–65°C to +175°C), thermal resistance (250°C/W junction-to-lead), and RoHS-compliant commercial-grade availability with TR tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgical bond ensures stable long-term voltage performance under thermal cycling and radiation exposure.
It delivers 5.6 V regulation at 250 mA test current (IZT), exhibits low noise density (4 µV/√Hz), and maintains tight dynamic impedance (1400 Ω) - enabling use in low-drift analog references where stability across –65°C to +175°C is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V at 250 mA - precise regulation point for low-voltage reference rails. |
| Power Dissipation | 500 mW at 25°C - supports continuous operation in compact through-hole designs with derating above 50°C. |
| Dynamic Impedance (ZZT) | 1400 Ω max at IZT - ensures minimal output voltage shift under load variation. |
| Reverse Current (IR) | 5.0 µA max at 4.0 V - guarantees low leakage before breakdown onset. |
| Temp. Coefficient (αVZ) | –0.020%/°C to +0.040%/°C - enables predictable drift compensation in wide-temperature systems. |
| Noise Density (ND) | 4 µV/√Hz - suitable for low-noise analog references and sensor excitation circuits. |
| Junction Temp. Range | –65°C to +175°C - validated for aerospace, defense, and downhole industrial environments. |
Pinout & Package
DO-35 (DO-204AH) axial-leaded hermetically sealed glass package; cathode indicated by color band; terminals are tin-lead or RoHS-compliant matte-tin plated; weight ≈ 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; must be negative relative to cathode for regulation. |
| Cathode | Regulated output terminal | Banded end; connected to higher-potential node; provides stable 5.6 V reference when reverse-biased. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTXV-level reliability certified for high-reliability military and space applications. |
| Metallurgical bond construction | Eliminates interfacial degradation, ensuring voltage stability over 20+ years in harsh thermal environments. |
| Low noise density | 4 µV/√Hz enables use in precision instrumentation front-ends without added filtering. |
| Hermetic glass sealing | Prevents moisture ingress and parametric shift in humid or corrosive operational settings. |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - no handling precautions required in assembly. |
Applications
| Aerospace Power Conditioning | Military Analog Reference |
|---|---|
Use Scenario: Regulating auxiliary bias rails in satellite DC-DC converters operating across –55°C to +125°C. IC Role / Device Role / Timing Role: Zener reference element providing stable 5.6 V for op-amp feedback networks and ADC reference dividers. Use Value: Maintains <±1% voltage deviation over full temperature range due to low αVZ and hermetic packaging. | Use Scenario: Precision voltage reference in field-deployable radar receiver front-ends. IC Role / Device Role / Timing Role: Low-noise shunt regulator supplying reference to RF mixer LO buffers and IF gain stages. Use Value: 4 µV/√Hz noise density prevents SNR degradation in sub-100 kHz baseband signal paths. |
| Downhole Sensor Excitation | Avionics Fault Monitoring |
Use Scenario: Exciting resistive bridge sensors in oil/gas well logging tools exposed to 175°C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener source for Wheatstone bridge excitation current. Use Value: Validated operation up to +175°C junction temperature ensures accuracy retention without active thermal control. | Use Scenario: Voltage supervision circuit detecting undervoltage conditions on aircraft avionics 28 V DC bus. IC Role / Device Role / Timing Role: Shunt-based threshold detector triggering fault latching logic at 5.6 V ±5%. Use Value: 5% tolerance and JANTXV qualification guarantee deterministic trip points across mission lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4626US | Same electrical specs but in surface-mount DO-213AA package; no axial leads. | Requires PCB rework for SMT assembly; unsuitable for through-hole prototyping or legacy board repair. | Select when automated assembly and board space reduction are prioritized over manual serviceability. |
| 1N4626UR-1 | Identical Zener parameters but in tabbed DO-216 package; RoHS-compliant only. | Limited to commercial-grade use; lacks MIL-qualified screening (JAN/JANTXV/JANS levels). | Choose for cost-sensitive industrial controls where military reliability is not mandated. |
Compared with 1N4626-1/TR, the 1N4626US offers identical regulation performance in a smaller footprint but sacrifices mechanical robustness and hand-soldering compatibility, while the 1N4626UR-1 reduces cost and meets RoHS but forfeits extended temperature validation and radiation hardness.
Availability
1N4626-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, military analog reference design, and downhole sensor excitation requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for 1N4626-1/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, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4626-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, engineered specifically for precision voltage regulation in mission-critical systems where parametric stability under extreme thermal, radiation, and vibration stress is non-negotiable.
FAQ
What is the Zener voltage tolerance for the 1N4626-1/TR?
The 1N4626-1/TR has a nominal Zener voltage of 5.6 V with a standard tolerance of ±5%, as defined by its JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under standard test conditions at 25°C with 250 mA Zener test current (IZT). The 1N4626-1/TR does not carry tighter tolerance suffixes (e.g., 'C' for 2% or 'D' for 1%) in its nomenclature.
Is the 1N4626-1/TR RoHS compliant?
Yes, the 1N4626-1/TR is RoHS compliant, indicated by the "e3" suffix in its full part number variant (e.g., 1N4626-1e3/TR). Per the datasheet, RoHS compliance applies to commercial-grade versions only; MIL-qualified variants (JAN/JANTX/JANTXV/JANS) retain leaded terminations. The 1N4626-1/TR supplied by Aetrix Electronics carries the e3 designation unless otherwise specified.
What is the maximum Zener test current (IZT) for the 1N4626-1/TR?
The maximum Zener test current (IZT) for the 1N4626-1/TR is 250 mA, as specified in the Electrical Characteristics table on page 3 of the datasheet. This current defines the operating point at which VZ = 5.6 V, ZZT = 1400 Ω max, and ND = 4 µV/√Hz are measured. Operation beyond 250 mA requires adherence to the 500 mW power derating curve shown in Figure 2.
Does the 1N4626-1/TR have radiation hardness certification?
Yes, the 1N4626-1/TR is inherently radiation hard, as documented in Microsemi MicroNote 050. Its metallurgically bonded glass construction and JANTXV qualification per MIL-PRF-19500/435 provide proven total ionizing dose (TID) tolerance suitable for low-earth orbit and avionics applications. Radiation test data is available upon request from Microchip's legacy Microsemi product support.
What is the thermal resistance junction-to-lead (RθJL) for the 1N4626-1/TR?
The thermal resistance junction-to-lead (RθJL) for the 1N4626-1/TR is 250°C/W, measured with 3/8 inch (10 mm) lead length from the package body, as stated in the Maximum Ratings table on page 1 of T4-LDS-0245-2 Rev. 1. This value assumes standard mounting on FR4 with 4 mm² copper pads and is critical for calculating safe operating current at elevated ambient temperatures.
1N4626-1/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):
- 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/TR FAQ
1.How can I place an order for 1N4626-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4626-1/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 1N4626-1/TR reliable?
The price and inventory of 1N4626-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4626-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4626-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4626-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4626-1/TR?
1N4626-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4626-1/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 1N4626-1/TR?
For technical support, including 1N4626-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4626-1/TR requirements.
6.How does Aetrix verify that 1N4626-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4626-1/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 1N4626-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4626-1/TR?
All 1N4626-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4626-1/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 1N4626-1/TR part is unused and in its original packaging.
Return procedure for 1N4626-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4626-1/TR Tags
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