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Microchip Technology 1N751C-1E3/TR
- Part No.:
- 1N751C-1E3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751C-1E3/TR.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,147
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Product details
Overview
1N751C-1E3/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-1E3/TR datasheet, 1N751C-1E3/TR pinout, 1N751C-1E3/TR application, or 1N751C-1E3/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 matte-tin plating.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 5.1 V at 49 mA test current (IZT), exhibiting low dynamic impedance (14 Ω) and dual-signature temperature coefficient behavior: negative below +125°C and positive above, enabling stable regulation across –65°C to +175°C operating range.
It features an internal metallurgical bond for enhanced reliability, meets MIL-STD-750 Method 1020 for ESD insensitivity, and delivers minimal capacitance-critical for noise-sensitive analog references and transient suppression in military-grade power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V at IZT = 49 mA - precise reference point for feedback loops and clamping thresholds |
| Zener Tolerance | ±2% - tighter than standard ±5%, reducing calibration margin in precision supplies |
| Dynamic Impedance (ZZT) | 14 Ω @ IZT - low AC impedance ensures stable output under varying load transients |
| Power Dissipation | 500 mW @ TL = +50°C (0.375″ lead length) - defines maximum continuous DC power before thermal derating |
| Temp. Coefficient (αVZ) | –0.030%/°C @ 25°C, +0.030%/°C @ +150°C - enables near-zero net drift over wide temperature span |
| Reverse Leakage (IR) | 5 µA @ VR = 2.0 V - low leakage preserves accuracy in high-impedance bias networks |
| Junction Temp. Range | –65°C to +175°C - supports operation in aerospace, downhole, and extended-temperature industrial systems |
Pinout & Package
Hermetically sealed axial-leaded DO-35 (DO-204AH) glass package with cathode indicated by colored 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; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated node or error amplifier input; polarity must be observed to avoid forward conduction |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/127 Qualified | JANTX-level qualification ensures tested reliability for defense and space applications |
| Metallurgical Bond Construction | Eliminates wire-bond failure modes, improving long-term stability under thermal cycling |
| RoHS-Compliant Plating | Matte-tin termination enables lead-free reflow compatibility without compromising solderability |
| Low Capacitance | Minimizes high-frequency coupling in RF-adjacent or fast-switching power domains |
| ESD Insensitivity | Non-sensitive per MIL-STD-750 Method 1020 - reduces handling risk in uncontrolled environments |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage to comparator or op-amp input. Use Value: ±2% tolerance and low ZZT ensure <±10 mV output variation across line/load/temperature in 5 V rail designs. | Use Scenario: Clamping transient surges on 5 V logic or sensor supply lines in avionics subsystems. IC Role / Device Role / Timing Role: Reverse-biased shunt element that conducts only above 5.1 V threshold. Use Value: 500 mW rating and –65°C to +175°C range enable reliable clamping during cold-start and hot-swap events. |
| Temperature-Stable Bias Network | Military-Grade Voltage Monitor |
Use Scenario: Generating bias currents for precision op-amps or transistor amplifiers in radar front-ends. IC Role / Device Role / Timing Role: Zener sets stable current through series resistor in high-impedance bias leg. Use Value: Dual-signature αVZ minimizes net drift, maintaining bias accuracy within ±0.5% from –55°C to +125°C. | Use Scenario: Monitoring 5 V system rail integrity in JANTX-qualified flight control modules. IC Role / Device Role / Timing Role: Reference element in comparator-based undervoltage/overvoltage detection circuit. Use Value: JANTX qualification and hermetic DO-35 package ensure functional reliability after 1000+ thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N751A-1E3/TR | ±5% tolerance (vs. ±2% for 1N751C-1E3/TR); identical VZ, package, and qualification level | Acceptable where calibration margin >±50 mV; not suitable for tight-reference designs | Select when cost sensitivity outweighs precision requirement and no recalibration is planned |
| BZX55C5V1-TR | Commercial-grade, ±5% tolerance, 500 mW, DO-35, but not MIL-qualified or JANTX-rated | Limited to non-military industrial use; lacks radiation hardness and extended temp validation | Choose for cost-driven commercial designs where MIL-spec compliance is unnecessary |
Compared with 1N751A-1E3/TR and BZX55C5V1-TR, the 1N751C-1E3/TR uniquely delivers ±2% initial accuracy combined with JANTX-level military qualification and verified performance from –65°C to +175°C-making it irreplaceable in calibrated, mission-critical voltage references.
Availability
1N751C-1E3/TR is available at Aetrix Electronics and suitable for aerospace power sequencing, defense-grade sensor signal conditioning, and industrial PLC voltage monitoring requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1N751C-1E3/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 military-qualified analog and mixed-signal components.
The 1N751C-1E3/TR belongs to Microsemi's legacy MIL-PRF-19500/127-qualified Zener diode family, designed specifically for precision voltage regulation in harsh-environment electronics where long-term stability and qualification traceability are mandatory.
FAQ
What is the Zener voltage and tolerance of the 1N751C-1E3/TR?
The 1N751C-1E3/TR has a nominal Zener voltage of 5.1 V at 49 mA test current (IZT) with a tight ±2% tolerance, confirmed in the Electrical Characteristics table on page 3 of Microsemi T4-LDS-0288 Rev. 1. This tolerance is designated by the "C" in the part number and enables high-accuracy voltage referencing without post-manufacture trimming. The 1N751C-1E3/TR achieves this specification under standard 25°C test conditions and maintains stability across its full operating temperature range.
Is the 1N751C-1E3/TR RoHS compliant?
Yes, the 1N751C-1E3/TR is RoHS compliant, indicated by the "e3" suffix in its nomenclature. Per Microsemi documentation, RoHS-compliant matte-tin plating is applied to the leads, and solderability is validated per MIL-STD-750 Method 2026. However, this RoHS compliance applies only to the commercial-grade version; the 1N751C-1E3/TR retains full JANTX qualification while meeting RoHS Directive 2011/65/EU requirements. The 1N751C-1E3/TR is not lead-free in the sense of exemption waivers-it is fully compliant.
What does the "TR" suffix mean in 1N751C-1E3/TR?
The "TR" suffix in 1N751C-1E3/TR denotes tape-and-reel packaging per EIA-296 standard, enabling automated surface-mount or axial insertion assembly. This packaging format includes carrier tape, cover tape, and reel quantities optimized for pick-and-place equipment. The "TR" does not affect electrical or reliability specifications-the 1N751C-1E3/TR performs identically to the bulk or ammo-pack versions. All 1N751C-1E3/TR units retain the same DO-35 package dimensions, JANTX qualification, and ±2% Zener tolerance.
What is the maximum power dissipation for the 1N751C-1E3/TR?
The 1N751C-1E3/TR has an average rated power dissipation of 500 mW when lead temperature (TL) is maintained at +50°C with 0.375 inch (9.53 mm) lead length from the body. At ambient temperature (TA) of +55°C on a PCB, the rating drops to 400 mW, derating linearly to zero at +175°C. These values are specified in the Maximum Ratings table on page 1 of T4-LDS-0288. The 1N751C-1E3/TR must be mounted with appropriate thermal relief to avoid exceeding junction temperature limits.
How is polarity marked on the 1N751C-1E3/TR?
The 1N751C-1E3/TR uses a cathode band-typically a single painted or etched ring near one end of the DO-35 glass body-to indicate the cathode terminal. Per Microsemi mechanical documentation, the banded end must be held at a higher potential than the anode for proper Zener regulation. Forward operation (anode positive) yields ~1.1 V drop at 200 mA, but the 1N751C-1E3/TR is intended exclusively for reverse-bias regulation. Incorrect polarity will prevent regulation and may cause unexpected forward conduction in the circuit.
1N751C-1E3/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-1E3/TR FAQ
1.How can I place an order for 1N751C-1E3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751C-1E3/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-1E3/TR reliable?
The price and inventory of 1N751C-1E3/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-1E3/TR is usually 5 days.
3.What payment methods are accepted for 1N751C-1E3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751C-1E3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751C-1E3/TR?
1N751C-1E3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751C-1E3/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-1E3/TR?
For technical support, including 1N751C-1E3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751C-1E3/TR requirements.
6.How does Aetrix verify that 1N751C-1E3/TR is sourced from the original manufacturer or authorized distributors?
All 1N751C-1E3/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-1E3/TR meets industry standards.
7.What is the process for return or replacement of 1N751C-1E3/TR?
All 1N751C-1E3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N751C-1E3/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-1E3/TR part is unused and in its original packaging.
Return procedure for 1N751C-1E3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751C-1E3/TR Tags
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