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Microchip Technology 1N4103-1/TR
- Part No.:
- 1N4103-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4103-1/TR.pdf
- Description:
- DIODE ZENER 9.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:8,730
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Product details
Overview
1N4103-1/TR from Microsemi is a 500 mW, 9.1 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 0.5 µA reverse leakage at 7.0 V. It serves as a precision voltage reference in military-grade power regulation circuits.
For engineers reviewing the 1N4103-1/TR datasheet, 1N4103-1/TR pinout, 1N4103-1/TR application, or 1N4103-1/TR equivalent, key selection criteria include Zener voltage stability over temperature (+0.080 %/°C), low noise density (1 µV/√Hz), hermetic glass packaging, and compliance with MIL-PRF-19500/435 reliability levels.
Technical Context
This device operates in reverse breakdown to maintain stable 9.1 V output across 250 mA test current and up to 40 mA maximum Zener current. Its metallurgically bonded junction ensures low thermal resistance (RθJL = 250 °C/W) and radiation hardness per MicroNote 050.
The 1N4103-1/TR exhibits minimal capacitance (typical <2 pF at 0 V), low forward voltage (1.1 V @ 200 mA), and is non-sensitive to ESD per MIL-STD-750 Method 1020 - enabling use in high-reliability analog reference and biasing circuits where signal integrity and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V ±5% at 250 mA - defines precise regulation point for reference design |
| Power Dissipation | 500 mW @ TL = 25 °C - supports continuous operation in compact axial-leaded layouts |
| Dynamic Impedance ZZT | 200 Ω @ 250 mA - ensures tight voltage regulation under varying load conditions |
| Reverse Leakage IR | 0.5 µA @ 7.0 V - guarantees low standby current in battery-backed or low-power systems |
| Temp. Coefficient αVZ | +0.080 %/°C - enables predictable drift compensation in wide-temperature environments |
| Noise Density ND | 1 µV/√Hz - critical for low-noise analog references and precision instrumentation |
| Junction Temp. Range | –65 to +175 °C - validated for aerospace, defense, and downhole industrial applications |
Pinout & Package
DO-35 (DO-204AH) axial-leaded glass package with cathode indicated by band; operated with banded end positive for Zener regulation. Hermetically sealed, tin-lead or RoHS-compliant matte-tin plating, ~0.2 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; establishes return path for Zener current |
| Cathode | Regulated output node | Banded end supplies stable 9.1 V when reverse-biased; must be held at higher potential than anode |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bond construction | Enables radiation hardness and long-term parameter stability under thermal cycling |
| MIL-PRF-19500/435 qualification | Validated reliability for JAN/JANTX-level deployment in mission-critical hardware |
| Low noise density (1 µV/√Hz) | Supports high-resolution ADC references and low-drift op-amp bias networks |
| Hermetic glass DO-35 package | Prevents moisture ingress and parametric shift in humid or corrosive environments |
| Non-ESD-sensitive design | Eliminates need for external protection in handling and assembly per MIL-STD-750 |
Applications
| Avionics Power Reference | Military Radio Biasing |
|---|---|
Use Scenario: Providing stable 9.1 V reference for analog-to-digital converters in flight control computers. IC Role / Device Role / Timing Role: Precision voltage reference for ADC voltage scaling and sensor signal conditioning. Use Value: Maintains ±0.455 V regulation tolerance over –55 to +125 °C, ensuring consistent conversion accuracy without recalibration. | Use Scenario: Setting bias points for RF amplifier stages in tactical HF/VHF transceivers. IC Role / Device Role / Timing Role: Stable DC bias source for transistor collector/drain nodes requiring low-noise, temperature-stable voltage. Use Value: 1 µV/√Hz noise density prevents AM sideband degradation; +0.080 %/°C TC allows predictable gain tracking across operating range. |
| Satellite Payload Regulation | Downhole Sensor Conditioning |
Use Scenario: Regulating supply rails for radiation-tolerant microcontrollers in LEO satellite subsystems. IC Role / Device Role / Timing Role: Radiation-hardened Zener regulator maintaining reference integrity during proton exposure. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in space-grade designs. | Use Scenario: Supplying calibrated excitation voltage to strain gauges and RTDs in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-temperature-stable voltage source for bridge excitation in >150 °C environments. Use Value: Operates continuously at +175 °C junction temperature with no parameter drift beyond spec limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4103US-1 | Same electrical specs; DO-213AA surface-mount package instead of DO-35 axial | Requires PCB re-layout; suited for automated SMT assembly and space-constrained boards | Select when transitioning from through-hole to high-density SMT production |
| 1N4739A | 9.1 V ±5%, 1 W rating, TO-204AE (DO-41) package, no MIL qualification | Lacks JANTX reliability screening and radiation hardness; suitable only for commercial-grade systems | Choose for cost-sensitive industrial controls where MIL-spec is not mandated |
Compared with 1N4103US-1 and 1N4739A, the 1N4103-1/TR uniquely delivers military-grade reliability in an axial-glass form factor - making it irreplaceable in legacy-maintained avionics and field-deployed defense electronics where leaded mounting and qualification traceability are mandatory.
Availability
1N4103-1/TR is available at Aetrix Electronics and suitable for avionics power reference, military radio biasing, and downhole sensor conditioning requiring stable component supply, full traceability, and long-term obsolescence management.
Supply support for 1N4103-1/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, radiation-hardened, and aerospace-grade components.
The 1N4103-1/TR belongs to Microsemi's legacy MIL-qualified Zener diode family, designed specifically for voltage regulation in defense, space, and critical infrastructure systems where parameter stability and long-term reliability outweigh cost sensitivity.
FAQ
What is the Zener voltage tolerance for the 1N4103-1/TR?
The 1N4103-1/TR has a nominal Zener voltage of 9.1 V with a standard tolerance of ±5%, as defined in the JEDEC specification and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2 Rev. 1. This tolerance applies at 25 °C with 250 mA test current and thermal equilibrium conditions.
Is the 1N4103-1/TR RoHS compliant?
Yes - the "e3" suffix denotes RoHS compliance, and the 1N4103-1/TR is offered in RoHS-compliant versions with annealed matte-tin plating, but only for commercial-grade units. The TR suffix indicates tape-and-reel packaging; RoHS status is independent and confirmed per Microsemi documentation.
What is the maximum Zener current (IZM) for the 1N4103-1/TR?
The maximum Zener current for the 1N4103-1/TR is 40 mA, as specified in the Electrical Characteristics table (page 3). This value corresponds to the current at which the device reaches its rated 500 mW power dissipation at 9.1 V, assuming ideal thermal conditions.
Does the 1N4103-1/TR require external ESD protection?
No - the 1N4103-1/TR is non-sensitive to ESD per MIL-STD-750 Method 1020, as stated in the Applications/Benefits section. Its construction and packaging eliminate the need for additional ESD protection circuitry during handling or in-system operation.
What is the thermal resistance from junction to lead (RθJL) for the 1N4103-1/TR?
The thermal resistance from junction to lead for the 1N4103-1/TR is 250 °C/W, measured with 3/8 inch (10 mm) lead length from the body, as listed in the Maximum Ratings table on page 1. This value supports thermal modeling for lead-mounted heatsinking in high-reliability assemblies.
1N4103-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- 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/TR FAQ
1.How can I place an order for 1N4103-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4103-1/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 1N4103-1/TR reliable?
The price and inventory of 1N4103-1/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4103-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4103-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4103-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4103-1/TR?
1N4103-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4103-1/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 1N4103-1/TR?
For technical support, including 1N4103-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4103-1/TR requirements.
6.How does Aetrix verify that 1N4103-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4103-1/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 1N4103-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4103-1/TR?
All 1N4103-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4103-1/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 1N4103-1/TR part is unused and in its original packaging.
Return procedure for 1N4103-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4103-1/TR Tags
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