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Microchip Technology 1N751C-1E3
- Part No.:
- 1N751C-1E3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751C-1E3.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
1N751C-1E3 from Microsemi is a 5.1 V, ±2% tolerance, 500 mW silicon Zener diode in DO-35 (DO-204AH) glass axial-leaded package, qualified to JANTX level per MIL-PRF-19500/127, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N751C-1E3 datasheet, 1N751C-1E3 pinout, 1N751C-1E3 application, or 1N751C-1E3 equivalent, key selection factors include its 5.1 V nominal Zener voltage at 49 mA test current, 14 Ω dynamic impedance, -0.030%/°C temperature coefficient at 25 °C, RoHS-compliant matte-tin plating, and military-grade reliability with -65 °C to +175 °C operating range.
Technical Context
The 1N751C-1E3 operates as a reverse-biased voltage reference diode with metallurgically bonded junction, delivering stable 5.1 V regulation across load currents from 1 mA to 75 mA. Its Zener impedance of 14 Ω at IZT = 49 mA ensures low output variation under dynamic load conditions.
Designed for high-reliability environments, it features a hermetically sealed glass DO-35 package, cathode band polarity marking, and thermal resistance of 250 °C/W (junction-to-lead) and 300 °C/W (junction-to-ambient on PCB), enabling robust thermal performance in constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZT = 49 mA - defines precise regulation point for feedback loops and reference rails |
| Zener Tolerance | ±2% - tighter than standard ±5%, enabling higher accuracy in analog sensing and calibration |
| Dynamic Impedance | 14 Ω at IZT - limits output voltage deviation under varying load current, critical for stable biasing |
| Max Power Dissipation | 500 mW at TL = 50 °C - supports continuous operation in compact, non-ventilated enclosures |
| Temp Coefficient αVZ | -0.030 %/°C at 25 °C - enables predictable drift compensation in wide-temperature industrial systems |
| Reverse Leakage IR | 5 µA at VR = 2.0 V - ensures minimal quiescent current draw in battery-powered standby circuits |
| Operating Temp Range | -65 °C to +175 °C - certified for aerospace, downhole, and military electronics without derating |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by a single black 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; establishes reference return path for regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; delivers stable 5.1 V to load when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| JANTX qualification per MIL-PRF-19500/127 | Validated reliability for defense and space applications, including burn-in, life test, and radiation hardness per MicroNote 050 |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling, ensuring long-term parameter stability |
| RoHS-compliant matte-tin plating (e3) | Enables lead-free reflow assembly while maintaining solderability and corrosion resistance per MIL-STD-750 |
| Low capacitance & ESD immunity | Minimal parasitic capacitance (<2 pF typical) and non-sensitive to ESD per MIL-STD-750 method 1020 |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 5.1 V threshold for error amplifier comparison. Use Value: ±2% tolerance and -0.030%/°C TC ensure <±3% total output variation across -55 °C to +125 °C ambient. | Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs in avionics control units. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when voltage exceeds 5.1 V. Use Value: 500 mW rating and 14 Ω Zz enable reliable clamping of 100 ms transients up to 150 mA without thermal runaway. |
| Calibration Standard | Temperature-Stable Biasing |
Use Scenario: Providing traceable voltage reference in portable multimeters and handheld test equipment. IC Role / Device Role / Timing Role: Primary voltage standard against which ADC references and DAC outputs are calibrated. Use Value: JANTX qualification guarantees parameter consistency across production lots, supporting metrology-grade repeatability. | Use Scenario: Biasing op-amp input stages in high-precision instrumentation amplifiers operating from -40 °C to +85 °C. IC Role / Device Role / Timing Role: Stable DC offset generator compensating for amplifier input offset drift. Use Value: Low TC and metallurgical bond minimize bias shift to <100 µV/°C over full industrial temperature range. |
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-1E3; same DO-35 package and JANTX qualification | Lower accuracy suitable for non-critical biasing but insufficient for precision reference designs | Select 1N751A-1 only when cost sensitivity outweighs voltage accuracy requirements |
| BZX55C5V1 | Commercial-grade, ±5% tolerance, 500 mW, DO-35, no MIL-spec qualification or metallurgical bond | Limited to commercial temperature range (-65 °C to +175 °C not guaranteed); no radiation hardness or extended life testing | Choose BZX55C5V1 for consumer-grade products where military reliability is unnecessary |
Compared with 1N751A-1 and BZX55C5V1, the 1N751C-1E3 delivers superior accuracy and assured reliability for mission-critical systems-its ±2% tolerance and JANTX qualification directly enable tighter system-level voltage margins and longer field lifetime without derating.
Availability
1N751C-1E3 is available at Aetrix Electronics and suitable for aerospace power conditioning, industrial sensor signal conditioning, and defense-grade voltage reference applications requiring stable component supply across extended product lifecycles.
Supply support for 1N751C-1E3 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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N751C-1E3 belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, engineered specifically for voltage regulation in harsh-environment electronics where parameter stability, radiation tolerance, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N751C-1E3?
The 1N751C-1E3 has a nominal Zener voltage of 5.1 V with a ±2% tolerance, meaning its actual regulation voltage falls between 4.998 V and 5.202 V at IZT = 49 mA and 25 °C. This tighter tolerance is specified by the "C" suffix in the part number and distinguishes it from the ±5% "A" variant (1N751A-1).
Is the 1N751C-1E3 RoHS compliant?
Yes, the 1N751C-1E3 is RoHS compliant, as indicated by the "e3" suffix. It uses annealed matte-tin plating on its leads and meets Directive 2011/65/EU. Note that RoHS compliance applies only to the commercial-grade version; JANTX-qualified units may retain tin-lead plating unless explicitly ordered with e3.
What does the "-1" suffix mean in 1N751C-1E3?
The "-1" suffix in 1N751C-1E3 denotes compliance with Microsemi's standard screening and test flow per MIL-PRF-19500/127, including electrical testing at temperature extremes, visual inspection, and lot traceability. It confirms the part meets baseline military quality requirements for the JANTX reliability level.
Can the 1N751C-1E3 be used in surface-mount designs?
No, the 1N751C-1E3 is packaged exclusively in the axial-leaded DO-35 (DO-204AH) glass case and is not a surface-mount device. For MELF-style SMT equivalents, Microsemi offers the 1N751CUR-1 series in DO-213AA package-but those are distinct orderables with different nomenclature and screening.
What is the maximum Zener current (IZM) for the 1N751C-1E3?
The maximum Zener current IZM for the 1N751C-1E3 is 75 mA, derived from its 500 mW power rating and 5.1 V nominal voltage (P = V × I → I = 0.5 W / 5.1 V ≈ 98 mA, derated to 75 mA per datasheet Table on Page 3). Operation beyond this risks thermal instability and parametric shift.
1N751C-1E3 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):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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)
1N751C-1E3 FAQ
1.How can I place an order for 1N751C-1E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751C-1E3 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-1E3 reliable?
The price and inventory of 1N751C-1E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N751C-1E3 is usually 5 days.
3.What payment methods are accepted for 1N751C-1E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751C-1E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751C-1E3?
1N751C-1E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751C-1E3 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-1E3?
For technical support, including 1N751C-1E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751C-1E3 requirements.
6.How does Aetrix verify that 1N751C-1E3 is sourced from the original manufacturer or authorized distributors?
All 1N751C-1E3 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-1E3 meets industry standards.
7.What is the process for return or replacement of 1N751C-1E3?
All 1N751C-1E3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N751C-1E3, 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-1E3 part is unused and in its original packaging.
Return procedure for 1N751C-1E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751C-1E3 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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