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Microchip Technology 1N751C-1
- Part No.:
- 1N751C-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751C-1.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,053
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Product details
Overview
1N751C-1 from Microsemi is a 5.1 V, ±2% tolerance, 500 mW axial-leaded silicon Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTX level per MIL-PRF-19500/127, used for precision voltage regulation in military and industrial power supply reference circuits.
For engineers reviewing the 1N751C-1 datasheet, 1N751C-1 pinout, 1N751C-1 application, or 1N751C-1 equivalent, key selection factors include its 5.1 V nominal Zener voltage at 45 mA, 14 Ω dynamic impedance at IZT, -0.030%/°C temperature coefficient at 25 °C, RoHS-compliant commercial option, and hermetically sealed glass construction with cathode band polarity marking.
Technical Context
The 1N751C-1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable output voltage across varying load current and temperature. Its metallurgical bond construction ensures reliability under thermal cycling and radiation exposure per MicroNote 050.
It delivers regulated voltage over -65 °C to +175 °C operating range with 250 °C/W junction-to-lead thermal resistance and 300 °C/W junction-to-ambient rating on PCB mount. Reverse leakage is limited to 5 µA at 2.0 V, and forward voltage is 1.1 V at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at 45 mA test current - defines primary regulation point for feedback references |
| Zener Tolerance | ±2% - tighter than standard ±5% variants, enabling higher-accuracy voltage references |
| Dynamic Impedance | 14 Ω at 45 mA - low impedance improves regulation stability against load transients |
| Power Dissipation | 500 mW at 50 °C lead temperature - supports robust operation in high-reliability linear regulators |
| Temp Coefficient αVZ | -0.030 %/°C at 25 °C, +0.030 %/°C at +150 °C - enables predictable drift compensation in wide-temp designs |
| Reverse Leakage IR | 5 µA at 2.0 V - ensures minimal quiescent current in standby or low-power bias networks |
| Package | DO-35 (DO-204AH) glass axial - hermetic seal meets MIL-PRF-19500/127 JANTX qualification requirements |
Pinout & Package
DO-35 (DO-204AH) glass axial 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 | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-biased regulation |
| Cathode | Zener breakdown terminal / regulation output node | Banded end; connected to regulated voltage rail; must be held positive relative to anode for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| JANTX qualification per MIL-PRF-19500/127 | Validated screening and testing for military-grade reliability and extended temperature operation |
| Metallurgical bond construction | Enhanced mechanical integrity and thermal cycling endurance vs. alloyed junctions |
| Hermetically sealed glass case | Prevents moisture ingress and long-term parameter drift in harsh environments |
| Radiation hardness per MicroNote 050 | Supports use in space-qualified and nuclear instrumentation applications without derating |
| Non-ESD-sensitive per MIL-STD-750 method 1020 | Eliminates need for ESD handling protocols during assembly and test |
Applications
| Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stable 5.1 V reference in discrete linear regulator feedback loop for analog sensor signal conditioning. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing precise setpoint for error amplifier comparison. Use Value: ±2% tolerance and low 14 Ω dynamic impedance ensure <±10 mV output variation across 10–100 mA load changes. | Use Scenario: Clamping transient spikes on 5 V logic rail during hot-swap or ESD events in avionics backplanes. IC Role / Device Role / Timing Role: Passive shunt clamp limiting voltage excursion above 5.1 V threshold. Use Value: Fast response to transients and 5 µA leakage at 2.0 V minimize standby power loss while maintaining protection margin. |
| Temperature-Stable Bias Network | Military Instrumentation Calibration |
Use Scenario: Generating temperature-compensated bias current for op-amp input stages in field-deployed test equipment. IC Role / Device Role / Timing Role: Precision voltage source feeding resistor network to define bias current magnitude. Use Value: Dual-coefficient spec (-0.030%/°C at 25°C, +0.030%/°C at 150°C) enables near-zero net drift over full operational range. | Use Scenario: Calibration reference in portable multimeters and handheld analyzers requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary shunt reference in self-calibration circuitry during factory and field recalibration cycles. Use Value: JANTX qualification and hermetic DO-35 packaging ensure long-term parametric stability and measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N751A-1 | ±5% Zener tolerance vs. ±2% for 1N751C-1; otherwise identical electrical and mechanical specs | Suitable where cost sensitivity outweighs precision requirement; less suitable for tight-tolerance feedback loops | Select 1N751A-1 only if ±5% regulation accuracy is acceptable in final design validation |
| BZX85C5V1 | 500 mW plastic DO-41 package; ±5% tolerance; no MIL-spec qualification; higher ZZT (~20 Ω) | Commercial-only use; not rated for extended temperature or radiation environments | Choose BZX85C5V1 only for non-military, non-critical consumer or industrial applications with relaxed reliability demands |
Compared with 1N751A-1 and BZX85C5V1, the 1N751C-1 provides superior voltage accuracy and military-grade reliability-critical for aerospace power references-while requiring no PCB layout change but demanding JANTX-level procurement controls.
Availability
1N751C-1 is available at Aetrix Electronics and suitable for military-grade power supply references, avionics overvoltage clamps, and calibration instrument design requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N751C-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 defense-qualified components.
The 1N751C-1 belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, designed specifically for precision voltage regulation in aerospace, defense, and critical infrastructure systems where long-term stability and environmental resilience are mandatory.
FAQ
What is the nominal Zener voltage and test current for the 1N751C-1?
The 1N751C-1 has a nominal Zener voltage of 5.1 V measured at a test current (IZT) of 45 mA. This value is specified at 25 °C ambient and confirmed per Microsemi T4-LDS-0288 Rev. 1. The ±2% tolerance ensures the actual regulation voltage falls between 4.998 V and 5.202 V under defined conditions, making it suitable for precision reference applications where tighter regulation is required than standard ±5% Zeners.
Is the 1N751C-1 qualified to military specifications?
Yes, the 1N751C-1 is qualified to JANTX level per MIL-PRF-19500/127. This includes rigorous screening for temperature cycling, burn-in, and parameter verification across -65 °C to +175 °C. The "C" suffix denotes ±2% Zener tolerance, and the "-1" suffix indicates the DO-35 glass package. It is not offered in JAN or JANTXV levels under this specific part number.
What is the maximum power dissipation rating for the 1N751C-1?
The 1N751C-1 has an average rated power dissipation of 500 mW at a lead temperature (TL) of +50 °C with 0.375 inch lead length from body. Power derates linearly to zero at +175 °C. When mounted on a PCB, it is rated for 400 mW at +55 °C ambient, derating to zero at +175 °C. These ratings are documented in the Maximum Ratings table of T4-LDS-0288 Rev. 1.
Does the 1N751C-1 have RoHS compliance options?
Yes, RoHS-compliant versions of the 1N751C-1 are available for commercial-grade use only, marked with the "e3" suffix (e.g., 1N751C-1e3). These feature annealed matte-tin plating and meet JEDEC J-STD-609A Class 3 requirements. MIL-spec versions (JANTX) retain traditional tin-lead plating and are not RoHS compliant per exemption 7a.
What is the Zener impedance and temperature coefficient of the 1N751C-1?
The 1N751C-1 has a maximum Zener impedance (ZZT) of 14 Ω at 45 mA test current and 25 °C. Its temperature coefficient is -0.030 %/°C at 25 °C and +0.030 %/°C at +150 °C, indicating a crossover point near mid-range temperatures. This dual-coefficient behavior supports stable regulation across wide thermal excursions in unheated enclosures or high-altitude deployments.
1N751C-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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1 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-204AH (DO-35)
1N751C-1 FAQ
1.How can I place an order for 1N751C-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751C-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 1N751C-1 reliable?
The price and inventory of 1N751C-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N751C-1 is usually 5 days.
3.What payment methods are accepted for 1N751C-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751C-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751C-1?
1N751C-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751C-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 1N751C-1?
For technical support, including 1N751C-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751C-1 requirements.
6.How does Aetrix verify that 1N751C-1 is sourced from the original manufacturer or authorized distributors?
All 1N751C-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 1N751C-1 meets industry standards.
7.What is the process for return or replacement of 1N751C-1?
All 1N751C-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N751C-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 1N751C-1 part is unused and in its original packaging.
Return procedure for 1N751C-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751C-1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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BZT52C15S-7-F
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SMAJ4744A-TP
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SMAZ12-13-F
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