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Microchip Technology 1N751C/TR
- Part No.:
- 1N751C/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751C/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,543
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Product details
Overview
1N751C/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 and used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N751C/TR datasheet, 1N751C/TR pinout, 1N751C/TR application, or 1N751C/TR equivalent, key selection criteria include Zener voltage tolerance (±2%), dynamic impedance (14 Ω @ 49 mA), temperature coefficient (–0.030%/°C @ 25°C / +0.030%/°C @ +150°C), junction-to-lead thermal resistance (250 °C/W), and RoHS-compliant commercial-grade availability with TR tape-and-reel packaging.
Technical Context
The 1N751C/TR operates as a reverse-biased voltage reference diode with metallurgically bonded construction for stable breakdown characteristics across –65°C to +175°C. Its Zener voltage is specified at IZT = 49 mA, with dynamic impedance measured using 10% rms AC superimposed on DC test current.
It exhibits dual-region temperature coefficient behavior: negative below ~5 V and positive above, with 1N751C/TR specifically rated at –0.030%/°C at 25°C and +0.030%/°C at +150°C - enabling predictable drift compensation in wide-temperature designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V ±2% at IZT = 49 mA - defines precise regulation point for feedback references. |
| Dynamic Impedance ZZT | 14 Ω @ IZT = 49 mA - determines output voltage stability under load variation. |
| Max Reverse Current IR | 5 µA @ VR = 2.0 V - ensures low leakage in standby or high-impedance bias networks. |
| Power Dissipation PM(AV) | 500 mW @ TL = 50°C (0.375″ lead length) - sets maximum continuous thermal limit in through-hole mounting. |
| Temp Coefficient αVZ | –0.030%/°C @ 25°C / +0.030%/°C @ +150°C - enables temperature-compensated reference design. |
| Junction-to-Lead RθJL | 250 °C/W - informs thermal design when leads serve as primary heat path. |
| Forward Voltage VF | 1.1 V @ IF = 200 mA - relevant for polarity-check or forward-protection use cases. |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; used for forward conduction or polarity identification. |
| Cathode | Banded end | Connected to higher-potential node during Zener regulation; defines reference output node in shunt regulator topology. |
Key Features
| Feature | Design Value |
|---|---|
| JANTX qualification | MIL-PRF-19500/127 certified for high-reliability military/aerospace applications with full traceability. |
| ±2% Zener tolerance | Enables tighter regulation than standard ±5% parts, reducing need for post-calibration trimming. |
| Metallurgical bond construction | Improves long-term parameter stability and resistance to thermal cycling-induced degradation. |
| Low capacitance | Minimizes high-frequency coupling in noise-sensitive analog reference paths. |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for space-qualified subsystems. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete op-amp-based regulators. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 5.1 V reference point for error amplifier input. Use Value: ±2% tolerance and low dynamic impedance ensure <±10 mV output variation across load and line changes. | Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on sensor interface lines. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground when voltage exceeds 5.1 V. Use Value: Fast response and low leakage (<5 µA at 2 V) prevent false triggering while maintaining signal integrity. |
| Temperature-Compensated Reference | Military Power Sequencing |
Use Scenario: Building dual-Zener temperature-stable references using complementary TC curves. IC Role / Device Role / Timing Role: One leg of a compensated reference pair leveraging its –0.030%/°C (25°C) and +0.030%/°C (+150°C) coefficients. Use Value: Enables <50 ppm/°C total drift over –55°C to +125°C without external components. | Use Scenario: Enabling controlled power-up sequencing in avionics systems requiring MIL-STD-704 compliance. IC Role / Device Role / Timing Role: Voltage threshold detector in discrete reset or enable circuitry for FPGA/CPU power rails. Use Value: JANTX qualification ensures reliability under shock, vibration, and extended temperature cycling per MIL-STD-810. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N751A/TR | ±5% Zener tolerance vs. ±2% for 1N751C/TR; otherwise identical electrical and mechanical specs. | Suitable where tighter regulation not required; lower cost for non-critical references. | Select 1N751A/TR only if system-level calibration or margin analysis permits wider voltage tolerance. |
| BZX55C5V1 | Commercial-grade, ±5% tolerance, 500 mW, DO-35 package; no MIL-PRF-19500 qualification. | Applicable in industrial/commercial designs without military reliability requirements. | Choose BZX55C5V1 for cost-sensitive, non-military applications where JANTX traceability is unnecessary. |
Compared with 1N751A/TR and BZX55C5V1, the 1N751C/TR delivers tighter initial accuracy and guaranteed military-grade reliability - critical for uncalibrated references in aerospace power systems where field recalibration is impractical.
Availability
1N751C/TR is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and temperature-compensated reference designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N751C/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N751C/TR belongs to Microsemi's legacy MIL-PRF-19500-qualified Zener diode family, designed specifically for precision voltage regulation in mission-critical systems where parameter stability, thermal robustness, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N751C/TR?
The 1N751C/TR has a nominal Zener voltage of 5.1 V with a tight ±2% tolerance, verified at IZT = 49 mA and 25°C. This tolerance is defined by the "C" suffix in the part number per Microsemi's nomenclature and is tighter than the ±5% tolerance of the 1N751A/TR variant. The 1N751C/TR maintains this specification across its qualified operating temperature range.
Is the 1N751C/TR RoHS compliant?
Yes, the 1N751C/TR is RoHS compliant, as indicated by the "e3" designation in its full military nomenclature and confirmed in Microsemi documentation. RoHS compliance applies to the commercial-grade version only; the JANTX-qualified 1N751C/TR retains tin-lead plating per MIL-STD-750 but remains compatible with selective Pb-free assembly processes where mixed-technology boards are used.
What does the "TR" suffix mean in 1N751C/TR?
The "TR" suffix in 1N751C/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated SMT placement despite the device being an axial-leaded DO-35 component. This format supports high-volume manufacturing and reduces handling damage risk. The 1N751C/TR reel contains standard quantities per Microsemi's packaging specification and is compatible with industry-standard feeders.
What is the maximum power dissipation of the 1N751C/TR under typical PCB mounting?
The 1N751C/TR has a maximum average power dissipation of 400 mW when mounted on a PCB at TA = 55°C, derating linearly to zero at 175°C. This value is lower than its 500 mW rating at TL = 50°C (0.375″ lead length) due to reduced thermal conduction in surface-mount-style board attachment. Derating curves are provided in Figure 2 of the T4-LDS-0288 datasheet.
How is polarity identified on the 1N751C/TR?
Polarity on the 1N751C/TR is identified by a single color band on the glass body, which marks the cathode terminal. During Zener regulation, the banded end must be held at a higher potential than the anode (non-banded end). This marking conforms to JEDEC standards and is visible under standard visual inspection; the 1N751C/TR must be oriented accordingly in shunt regulator or clamping configurations.
1N751C/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/TR FAQ
1.How can I place an order for 1N751C/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751C/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/TR reliable?
The price and inventory of 1N751C/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/TR is usually 5 days.
3.What payment methods are accepted for 1N751C/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751C/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751C/TR?
1N751C/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751C/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/TR?
For technical support, including 1N751C/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751C/TR requirements.
6.How does Aetrix verify that 1N751C/TR is sourced from the original manufacturer or authorized distributors?
All 1N751C/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/TR meets industry standards.
7.What is the process for return or replacement of 1N751C/TR?
All 1N751C/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N751C/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/TR part is unused and in its original packaging.
Return procedure for 1N751C/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751C/TR Tags
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