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Microchip Technology 1N4103-1
- Part No.:
- 1N4103-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4103-1.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,919
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Product details
Overview
1N4103-1 from Microsemi is a 500 mW, 9.1 V Zener diode in DO-35 glass package, qualified to JANTXV level per MIL-PRF-19500/435. It delivers ±5% voltage tolerance, 200 Ω dynamic impedance at 250 mA test current, and operates across –65 °C to +175 °C for precision voltage regulation in high-reliability analog power supplies.
For engineers reviewing the 1N4103-1 datasheet, 1N4103-1 pinout, 1N4103-1 application, or 1N4103-1 equivalent, key selection criteria include its 9.1 V nominal Zener voltage, 7.0 mA maximum Zener current at rated power, low noise density (1 µV/√Hz), hermetic glass construction, and military-grade thermal stability.
Technical Context
The 1N4103-1 functions as a two-terminal shunt voltage regulator with cathode-banded polarity. Its metallurgically bonded junction ensures stable breakdown behavior under thermal cycling and radiation exposure, supporting operation up to 175 °C junction temperature.
It exhibits a positive temperature coefficient of +0.080 %/°C, enabling predictable voltage drift over temperature, and maintains ≤0.5 µA reverse leakage at 7.0 V, ensuring minimal quiescent current draw in standby regulation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V at 250 mA - precise reference point for regulated output in feedback loops |
| Power Dissipation | 500 mW - supports continuous regulation without heatsinking below 50 °C ambient |
| Dynamic Impedance ZZT | 200 Ω - limits output voltage variation under load transients |
| Reverse Leakage IR | 0.5 µA @ 7.0 V - enables ultra-low-power biasing in sensor interfaces |
| Temp Coefficient αVZ | +0.080 %/°C - allows accurate thermal drift compensation in precision references |
| Noise Density | 1 µV/√Hz - suitable for low-noise analog signal conditioning and ADC reference buffers |
| Junction Temp Range | –65 °C to +175 °C - certified for aerospace, downhole, and defense electronics |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation node | Banded end; supplies stable 9.1 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Prevents moisture ingress and parameter drift over decades in harsh environments |
| MIL-PRF-19500/435 qualification | Validated reliability for JANTXV-level applications including avionics and satellite subsystems |
| Metallurgical bond construction | Eliminates interfacial delamination during thermal shock and mechanical vibration |
| Low capacitance (typ. <1.5 pF) | Minimizes high-frequency loading in RF bias networks and fast-switching regulators |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per Microsemi MicroNote 050 |
Applications
| Avionics Power Conditioning | Downhole Sensor Reference |
|---|---|
Use Scenario: Regulating auxiliary 9 V rail in flight control interface modules exposed to wide thermal excursions. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and comparators. Use Value: Maintains ±0.7% output accuracy over –55 °C to +125 °C due to +0.080 %/°C tempco and hermetic sealing. | Use Scenario: Establishing precision reference voltage for pressure transducer signal conditioning in oil/gas well logging tools. IC Role / Device Role / Timing Role: Primary Zener reference in isolated analog front-end with >10-year field life requirement. Use Value: Delivers <0.5 µA leakage at 7 V and survives 175 °C downhole temperatures without parameter shift. |
| Military Radio Bias Supply | Satellite Payload Voltage Clamp |
Use Scenario: Clamping RF amplifier supply rails against transient overvoltage in manpack radios operating in ESD-prone environments. IC Role / Device Role / Timing Role: Transient suppression element leveraging low dynamic impedance and fast response. Use Value: Limits voltage excursions to ≤9.3 V during 1 kV ESD events while maintaining <1 µV/√Hz noise floor. | Use Scenario: Protecting CMOS ADC inputs from latch-up in low-earth-orbit satellite telemetry systems. IC Role / Device Role / Timing Role: Radiation-hardened clamp diode referenced to spacecraft ground. Use Value: Withstands >100 krad(Si) TID and provides stable 9.1 V clamping without degradation after proton irradiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4737A | 10 V nominal, 1% tolerance, 1 W rating, DO-41 package | Higher power and tighter tolerance but larger footprint and non-military qualified | Select when commercial-grade 10 V regulation with higher surge capability is acceptable |
| CMHZ5239B | 9.1 V nominal, ±5%, 500 mW, SOD-123 surface-mount package | Same electrical specs but not MIL-qualified; lacks radiation hardness and hermetic seal | Select only for cost-sensitive commercial PCBs where space constraints prohibit axial leads |
Compared with 1N4103-1, the 1N4737A offers higher power and tighter tolerance but no military qualification or radiation tolerance, while the CMHZ5239B matches voltage and power but sacrifices hermeticity, temperature range, and reliability certification required for mission-critical systems.
Availability
1N4103-1 is available at Aetrix Electronics and suitable for avionics power conditioning, downhole sensor reference, and military radio bias supply requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4103-1 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, emphasizing radiation tolerance, extended temperature operation, and military qualification.
The 1N4103-1 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, engineered specifically for voltage regulation in safety-critical analog subsystems where parameter stability under extreme environmental stress is mandatory.
FAQ
What is the Zener voltage tolerance for the 1N4103-1?
The 1N4103-1 has a nominal Zener voltage of 9.1 V with a standard tolerance of ±5%, as defined in the JEDEC specification and confirmed in Microsemi's T4-LDS-0245-2 datasheet. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current, and is consistent across JAN, JANTX, JANTXV, and JANS reliability levels.
Is the 1N4103-1 suitable for high-temperature operation?
Yes, the 1N4103-1 is rated for junction and storage temperatures from –65 °C to +175 °C and is qualified to JANTXV level per MIL-PRF-19500/435. Its metallurgically bonded construction and hermetic glass package ensure stable 1N4103-1 performance in downhole, avionics, and engine-control environments where sustained high-temperature operation is required.
Does the 1N4103-1 have radiation hardness?
Yes, the 1N4103-1 is inherently radiation hard as documented in Microsemi MicroNote 050. Its construction and process yield tolerance to total ionizing dose (TID) relevant for space and nuclear applications. This radiation hardness is a verified characteristic of the 1N4103-1 family and is independent of RoHS compliance status.
What is the maximum Zener current for the 1N4103-1 at 25 °C?
The maximum Zener current IZM for the 1N4103-1 is 40 mA at 25 °C, derived from its 500 mW power rating and 9.1 V nominal Zener voltage. The datasheet specifies 7.0 mA as the maximum current at rated power under linear derating conditions, confirming safe continuous operation at that level without exceeding thermal limits.
How is polarity marked on the 1N4103-1?
The 1N4103-1 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode for Zener regulation. This marking complies with industry-standard DO-35 conventions and is visible on the glass body; the 1N4103-1 must be installed with the band oriented toward the positive rail in shunt regulator configurations.
1N4103-1 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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 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)
1N4103-1 FAQ
1.How can I place an order for 1N4103-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4103-1 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 1N4103-1 reliable?
The price and inventory of 1N4103-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4103-1 is usually 5 days.
3.What payment methods are accepted for 1N4103-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4103-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4103-1?
1N4103-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4103-1 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 1N4103-1?
For technical support, including 1N4103-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4103-1 requirements.
6.How does Aetrix verify that 1N4103-1 is sourced from the original manufacturer or authorized distributors?
All 1N4103-1 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 1N4103-1 meets industry standards.
7.What is the process for return or replacement of 1N4103-1?
All 1N4103-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4103-1, 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 1N4103-1 part is unused and in its original packaging.
Return procedure for 1N4103-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4103-1 Tags
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