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Microchip Technology 1N751C-1/TR
- Part No.:
- 1N751C-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751C-1/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,263
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Product details
Overview
1N751C-1/TR 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 power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N751C-1/TR datasheet, 1N751C-1/TR pinout, 1N751C-1/TR application, or 1N751C-1/TR equivalent, key selection factors include its 5.1 V nominal Zener voltage at 49 mA, 14 Ω dynamic impedance at IZT, ±2% tolerance, -0.030%/°C temperature coefficient at 25 °C, and RoHS-compliant commercial-grade availability with TR tape-and-reel packaging.
Technical Context
This device operates as a reverse-biased voltage reference, maintaining stable 5.1 V regulation across current from 1 mA to 75 mA and temperature from -65 °C to +175 °C. Its metallurgically bonded junction ensures low noise, minimal capacitance, and radiation hardness per MicroNote 050.
The 1N751C-1/TR exhibits a dual-signature temperature coefficient: -0.030%/°C at 25 °C and +0.030%/°C at +150 °C, enabling stable regulation across wide thermal ranges. It delivers 50 mA maximum Zener current (IZM) at rated power and supports non-sensitive ESD handling per MIL-STD-750 method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 5.1 V at 49 mA test current - defines primary regulation setpoint for feedback loops and reference rails. |
| Zener Tolerance | ±2% - tighter than standard ±5%, enabling higher-accuracy analog references without trimming. |
| Dynamic Impedance (ZZT) | 14 Ω at 49 mA - low AC impedance ensures minimal output voltage variation under load transients. |
| Max Power Dissipation | 500 mW at 50 °C lead temperature - supports robust operation in compact, unheatsinked designs. |
| Temp Coefficient (αVZ) | -0.030%/°C @ 25 °C, +0.030%/°C @ +150 °C - near-zero net drift across industrial temperature range. |
| Reverse Leakage (IR) | 5 µA max @ 2.0 V - ensures low quiescent current in standby and battery-backed circuits. |
| Forward Voltage (VF) | 1.1 V @ 200 mA - enables use as clamping diode in bidirectional protection schemes. |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by 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 (unbanded end) | Reference ground node | Connected to circuit common; reverse bias applied between cathode and this terminal for regulation. |
| Cathode (banded end) | Regulated output node | Provides stable 5.1 V relative to anode; polarity must be observed to avoid forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| JANTX qualification per MIL-PRF-19500/127 | Validated reliability for aerospace and defense systems requiring extended temperature and radiation tolerance. |
| Metallurgical bond construction | Eliminates wire bonds, reducing failure modes and improving thermal stability under power cycling. |
| RoHS-compliant commercial grade (e3) | Meets environmental compliance without sacrificing electrical performance or package integrity. |
| Low 14 Ω dynamic impedance | Minimizes output voltage ripple in high-frequency switching environments such as DC-DC converter feedback paths. |
| Non-ESD-sensitive per MIL-STD-750 | Enables handling without special ESD controls during board assembly and repair. |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulators and isolated DC-DC converters. IC Role / Device Role / Timing Role: Precision voltage reference node defining output setpoint accuracy. Use Value: ±2% tolerance and low ZZT ensure <±1% output regulation error across line/load/temperature. | Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs. IC Role / Device Role / Timing Role: Shunt protection element diverting excess energy to ground above 5.1 V. Use Value: Fast response and 500 mW surge capability limit voltage excursions to safe levels without latch-up. |
| Temperature-Stable Biasing | Military-Grade Sensor Conditioning |
Use Scenario: Providing bias voltage for op-amp input stages in instrumentation amplifiers. IC Role / Device Role / Timing Role: Low-drift reference source compensating for amplifier offset drift. Use Value: Dual-signature αVZ yields <±0.1% total voltage shift from -55 °C to +125 °C. | Use Scenario: Voltage regulation in avionics sensor signal chains operating at extreme ambient temperatures. IC Role / Device Role / Timing Role: MIL-qualified reference ensuring functional safety under shock, vibration, and radiation. Use Value: JANTX qualification and radiation hardness per MicroNote 050 support DO-160 and MIL-STD-810 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N751A-1/TR | ±5% tolerance (vs. ±2%); same VZ, package, and qualification level. | Acceptable where reference accuracy <±5% suffices; lower cost. | Select 1N751A-1/TR when budget constraints outweigh precision requirements. |
| BZX55C5V1-TR | Commercial-grade only; ±5% tolerance; 500 mW; DO-35; no MIL qualification. | Limited to industrial/commercial systems without reliability or radiation requirements. | Choose BZX55C5V1-TR for cost-sensitive consumer or embedded applications lacking military specs. |
Compared with 1N751A-1/TR and BZX55C5V1-TR, the 1N751C-1/TR uniquely combines ±2% tolerance, JANTX-level qualification, and radiation hardness-making it irreplaceable in high-reliability analog reference designs where accuracy and assurance are co-dependent.
Availability
1N751C-1/TR is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and military-grade sensor conditioning requiring stable component supply across long-lifecycle programs.
Supply support for 1N751C-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N751C-1/TR belongs to Microsemi's legacy MIL-PRF-19500/127-qualified Zener series, designed specifically for precision voltage regulation in mission-critical systems demanding extended temperature operation and radiation tolerance.
FAQ
What is the nominal Zener voltage and test current for the 1N751C-1/TR?
The 1N751C-1/TR has a nominal Zener voltage of 5.1 V measured at a test current (IZT) of 49 mA. This value is guaranteed within ±2% tolerance at 25 °C and forms the basis for its use as a precision reference in regulated power supplies and feedback networks. The 1N751C-1/TR maintains this voltage with low dynamic impedance (14 Ω), ensuring stability under varying load conditions.
Is the 1N751C-1/TR qualified to military specifications?
Yes, the 1N751C-1/TR is qualified to JANTX level per MIL-PRF-19500/127, confirming its suitability for aerospace and defense applications. This qualification covers environmental testing, reliability screening, and process controls beyond commercial standards. The 1N751C-1/TR also meets MIL-STD-750 ESD sensitivity requirements and demonstrates inherent radiation hardness per Microsemi MicroNote 050.
What does the "C" in 1N751C-1/TR indicate?
The "C" in 1N751C-1/TR denotes ±2% Zener voltage tolerance, per Microsemi's part nomenclature. It distinguishes this variant from the ±5% "A" version (1N751A-1/TR) and the ±1% "D" version. The "TR" suffix indicates tape-and-reel packaging per EIA-296, while the "-1" identifies the metallurgically bonded construction. The 1N751C-1/TR retains full JANTX qualification and DO-35 packaging regardless of tolerance grade.
Can the 1N751C-1/TR be used in surface-mount designs?
No, the 1N751C-1/TR is exclusively packaged 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 part numbers with different markings, qualification levels, and packaging. The 1N751C-1/TR requires through-hole mounting with 0.375 inch lead length for thermal derating compliance.
What is the maximum Zener current (IZM) and how is it determined?
The maximum Zener current (IZM) for the 1N751C-1/TR is 50 mA, derived from its 500 mW power rating and 5.1 V nominal voltage (P = V × I). This value assumes operation at 50 °C lead temperature; power derates linearly to zero at 175 °C. The 1N751C-1/TR datasheet specifies IZM with allowance for junction heating and dynamic impedance effects, ensuring safe continuous operation within defined thermal limits.
1N751C-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):
- 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/TR FAQ
1.How can I place an order for 1N751C-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751C-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 1N751C-1/TR reliable?
The price and inventory of 1N751C-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 1N751C-1/TR is usually 5 days.
3.What payment methods are accepted for 1N751C-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751C-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751C-1/TR?
1N751C-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751C-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 1N751C-1/TR?
For technical support, including 1N751C-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751C-1/TR requirements.
6.How does Aetrix verify that 1N751C-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N751C-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 1N751C-1/TR meets industry standards.
7.What is the process for return or replacement of 1N751C-1/TR?
All 1N751C-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N751C-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 1N751C-1/TR part is unused and in its original packaging.
Return procedure for 1N751C-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751C-1/TR Tags
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