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Microchip Technology 1N4100-1
- Part No.:
- 1N4100-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4100-1.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,913
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Product details
Overview
1N4100-1 from Microsemi is a 500 mW, 7.5 V Zener diode in DO-35 glass package, qualified to JANTX level per MIL-PRF-19500/435, with ±5% voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and max noise density of 1 µV/√Hz - used for precision voltage reference and regulation in aerospace power conditioning circuits.
For engineers reviewing the 1N4100-1 datasheet, 1N4100-1 pinout, 1N4100-1 application, or 1N4100-1 equivalent, this page delivers verified electrical specs, military-grade reliability context, thermal derating behavior, Zener knee characteristics, and direct alternatives for high-reliability analog design.
Technical Context
The 1N4100-1 operates as a reverse-biased voltage regulator with a nominal Zener voltage of 7.5 V at 250 mA test current (IZT), exhibiting +0.065 %/°C temperature coefficient and 200 Ω dynamic impedance (ZZT). It maintains regulation across 5.7–7.0 mA Zener current range (IZM = 40 mA) and supports stable operation from –65 °C to +175 °C junction temperature.
Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per Microsemi MicroNote 050, while low 1 µV/√Hz noise density and minimal capacitance (<5 pF typical) enable use in low-noise reference and timing-critical analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V at 250 mA - defines precise regulation point for feedback loops and reference generation |
| Power Dissipation | 500 mW at 25 °C - sets maximum continuous DC power handling before thermal derating begins at 50 °C |
| Dynamic Impedance (ZZT) | 200 Ω at IZT - determines output voltage stability under load transients and ripple rejection capability |
| Reverse Leakage (IR) | 1.0 µA at VR = 5.7 V - ensures minimal quiescent current draw in standby or low-power bias networks |
| Noise Density (ND) | 1 µV/√Hz - enables use in ultra-low-noise analog references where spectral purity affects ADC accuracy |
| Temp Coefficient (αVZ) | +0.065 %/°C - quantifies voltage drift over temperature; critical for wide-range environmental operation |
| Junction Temp Range | –65 °C to +175 °C - supports deployment in extreme environments including space-grade and downhole systems |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package: hermetically sealed, cathode indicated by band; banded end is anode when used as forward diode, but functions as cathode (positive terminal) during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or lowest potential node in shunt regulator topology |
| Cathode (banded end) | Zener regulation terminal | Connected to unregulated input; clamps voltage to 7.5 V relative to anode during reverse breakdown |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/435 qualification | JANTX level certified - guarantees screening, lot traceability, and failure rate compliance for defense/aerospace BOMs |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling - essential for long-term reliability in mission-critical hardware |
| Low noise density | 1 µV/√Hz at 7.5 V - reduces contribution to system-level noise floor in precision instrumentation front-ends |
| Hermetic glass package | Prevents moisture ingress and parametric shift over time - validated for >20-year shelf life in controlled storage |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for low-dose space applications without shielding |
Applications
| Avionics Power Reference | Satellite Sensor Biasing |
|---|---|
Use Scenario: Providing stable 7.5 V reference for ADC drivers and op-amp bias networks in flight control computers. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail against load and temperature variation. Use Value: Maintains <±0.5% output stability over –55 °C to +125 °C ambient due to +0.065 %/°C αVZ and 200 Ω ZZT. |
Use Scenario: Biasing photodiode preamplifiers and radiation-hardened sensor interfaces in LEO satellite payloads. IC Role / Device Role / Timing Role: Low-noise Zener reference establishing DC operating point for analog signal chains. Use Value: 1 µV/√Hz noise density prevents degradation of SNR in sub-16-bit sensor digitization paths. |
| Downhole Telemetry Regulator | Military Radio RF Stage Bias |
Use Scenario: Regulating bias voltage for pressure/temperature transducer signal conditioners in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-temperature shunt regulator maintaining reference integrity at 175 °C junction limit. Use Value: Guaranteed operation up to +175 °C TJ enables direct mounting on heated sensor PCBs without heatsinking. |
Use Scenario: Setting gate bias for GaAs FET amplifiers in secure HF/VHF tactical radios. IC Role / Device Role / Timing Role: Stable DC reference source for Class-A amplifier bias networks requiring low-drift performance. Use Value: JANTX qualification ensures zero latent defects and full lot traceability required for DoD field-deployable equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4100UR-1 | Same 7.5 V Zener spec, but in DO-213AA surface-mount package - no axial leads, 2.5 mm × 1.3 mm footprint | Used where board space is constrained and reflow assembly is required; lacks axial mechanical strain relief | Select 1N4100UR-1 only when transitioning from through-hole to SMT layout and thermal mass constraints permit |
| 1N4734A | 7.5 V, 1 W rating, ±5% tolerance, TO-92 package - higher power, larger thermal resistance (500 °C/W), no MIL qualification | Applicable in commercial industrial controls but not qualified for aerospace or defense programs requiring JANTX screening | Choose 1N4734A only for cost-sensitive non-military designs where 1 W dissipation and RoHS compliance are priorities |
Compared with 1N4100-1, the 1N4100UR-1 offers identical regulation performance in compact SMT form but forfeits axial-mount ruggedness, while the 1N4734A trades military reliability and low-noise operation for higher power and lower cost in commercial applications.
Availability
1N4100-1 is available at Aetrix Electronics and suitable for avionics power reference, satellite sensor biasing, and downhole telemetry requiring stable component supply with full MIL-PRF-19500/435 traceability and long-lifecycle support.
Supply support for 1N4100-1 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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N4100-1 belongs to Microsemi's legacy MIL-qualified Zener diode family designed specifically for precision voltage regulation in mission-critical systems where parametric stability, hermeticity, and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4100-1?
The 1N4100-1 has a nominal Zener voltage of 7.5 V with a standard tolerance of ±5%, as defined in JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current.
Is 1N4100-1 suitable for high-temperature operation?
Yes, the 1N4100-1 is rated for junction temperatures from –65 °C to +175 °C and features linear power derating from 500 mW at 25 °C to zero at 175 °C. Its metallurgically bonded glass DO-35 package sustains performance in downhole and avionics environments where sustained high-temperature operation is required.
Does 1N4100-1 meet RoHS requirements?
No - the 1N4100-1 is a JANTX-qualified military-grade part and is not RoHS compliant. RoHS-compliant versions (e.g., 1N4100-1e3) are available only for commercial-grade variants, as noted in the nomenclature section of the datasheet; JANTX-level parts retain tin-lead plating per MIL-STD-750.
What is the maximum Zener current (IZM) for 1N4100-1?
The maximum Zener current (IZM) for 1N4100-1 is 40 mA, specified at 25 °C ambient and defined as the peak DC current that maintains regulation within rated power limits. Exceeding this value risks thermal runaway unless active cooling or derating is applied per Figure 2 power curve.
How does the noise performance of 1N4100-1 compare to lower-voltage Zeners?
The 1N4100-1 exhibits 1 µV/√Hz noise density at 7.5 V, consistent with the trend described in the FEATURES section: noise falls rapidly below 6.8 V, reaching 1 µV/√Hz at 7.5 V and lower. This makes it among the quietest options in its voltage class for precision analog reference use.
1N4100-1 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4100-1 FAQ
1.How can I place an order for 1N4100-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4100-1 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 1N4100-1 reliable?
The price and inventory of 1N4100-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4100-1 is usually 5 days.
3.What payment methods are accepted for 1N4100-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4100-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4100-1?
1N4100-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4100-1 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 1N4100-1?
For technical support, including 1N4100-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4100-1 requirements.
6.How does Aetrix verify that 1N4100-1 is sourced from the original manufacturer or authorized distributors?
All 1N4100-1 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 1N4100-1 meets industry standards.
7.What is the process for return or replacement of 1N4100-1?
All 1N4100-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4100-1, 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 1N4100-1 part is unused and in its original packaging.
Return procedure for 1N4100-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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