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Microchip Technology 1N751D-1
- Part No.:
- 1N751D-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N751D-1.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,958
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Product details
Overview
1N751D-1 from Microsemi is a 5.1 V, ±1% tolerance, 500 mW axial-leaded silicon Zener diode in DO-35 (DO-204AH) glass package, qualified to JANTXV level per MIL-PRF-19500/127, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N751D-1 datasheet, 1N751D-1 pinout, 1N751D-1 application, or 1N751D-1 equivalent, key selection criteria include its tight 1% Zener voltage tolerance, low 14 Ω dynamic impedance at 49 mA, -0.030%/°C to +0.030%/°C temperature coefficient, and military-grade reliability across -65°C to +175°C operating range.
Technical Context
The 1N751D-1 operates as a reverse-biased voltage reference with nominal Zener voltage of 5.1 V at 49 mA test current (IZT), exhibiting a bipolar temperature coefficient ranging from -0.030%/°C at 25°C to +0.030%/°C at +150°C. Its internal metallurgical bond ensures stable breakdown characteristics under thermal stress.
It delivers regulated output with maximum reverse leakage of 5 µA at 2.0 V (VR), dynamic impedance of 14 Ω at IZT, and maximum Zener current of 75 mA (IZM). Thermal resistance is 250°C/W junction-to-lead (RθJL) and 300°C/W junction-to-ambient on PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V ±1% at 49 mA - enables precise reference generation in analog feedback loops |
| Power Dissipation | 500 mW at TL = 50°C - supports stable operation in compact through-hole designs |
| Dynamic Impedance ZZT | 14 Ω at IZT - ensures low output impedance for effective ripple suppression |
| Temp Coefficient αVZ | -0.030%/°C to +0.030%/°C - minimizes drift in wide-temperature industrial environments |
| Reverse Leakage IR | 5 µA max at VR = 2.0 V - guarantees low standby current in battery-backed circuits |
| Junction Temp Range | -65°C to +175°C - validated for aerospace, defense, and downhole applications |
| Package | DO-35 (DO-204AH) glass axial - hermetically sealed, RoHS-compliant plating available |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by band; banded end is positive during Zener regulation. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to circuit ground or lower potential node in reverse-bias configuration |
| Cathode | Banded lead | Connected to regulated output node; must be held at higher potential than anode for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| 1% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in critical analog subsystems |
| JANTXV qualification | Fully compliant with MIL-PRF-19500/127 for high-reliability defense and space programs |
| Metallurgical bond construction | Eliminates interfacial delamination risk under thermal cycling and mechanical shock |
| Radiation hardness | Inherently radiation-tolerant per Microsemi MicroNote 050 - suitable for low-dose space applications |
| Low capacitance | Minimizes high-frequency coupling in RF-adjacent power rails and signal conditioning stages |
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 diode provides fixed reference voltage to error amplifier input. Use Value: Tight 1% tolerance and low 14 Ω impedance ensure <±10 mV output variation across load and line changes. | Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs exposed to ESD or inductive kickback. IC Role / Device Role / Timing Role: Shunts excess energy to ground when voltage exceeds 5.1 V threshold. Use Value: Fast response and 75 mA IZM rating allow safe dissipation of short-duration transients without degradation. |
| Temperature-Stable Biasing | Military Instrumentation |
Use Scenario: Setting bias points for op-amp input stages or precision current sources in environmental test chambers. IC Role / Device Role / Timing Role: Provides temperature-compensated reference voltage for analog front-end calibration. Use Value: Bipolar tempco (-0.030%/°C to +0.030%/°C) reduces net drift across -55°C to +125°C operating envelope. | Use Scenario: Voltage regulation in avionics control modules, missile guidance subsystems, and hardened communication equipment. IC Role / Device Role / Timing Role: Primary voltage reference in mission-critical analog monitoring circuits. Use Value: JANTXV qualification and -65°C to +175°C operation meet MIL-STD-810G thermal shock and vibration requirements. |
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 | Same 5.1 V nominal, but ±5% tolerance (vs. ±1% for 1N751D-1) | Acceptable where cost-sensitive commercial designs tolerate wider output variation | Select 1N751A-1 only if ±5% regulation accuracy suffices and JANTXV qualification is not required |
| BZX55C5V1 | Commercial-grade, ±5% tolerance, 500 mW, DO-35 - no military qualification or metallurgical bond | Suitable for consumer electronics; lacks radiation hardness and extended temperature validation | Choose BZX55C5V1 for non-critical, cost-driven applications with ambient-only temperature requirements |
Compared with 1N751A-1 and BZX55C5V1, the 1N751D-1 delivers superior accuracy, guaranteed military reliability, and inherent radiation tolerance - making it the only option for JANTXV-certified systems requiring ≤±1% voltage stability across extreme environments.
Availability
1N751D-1 is available at Aetrix Electronics and suitable for aerospace power sequencing, defense-grade instrumentation, and industrial control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N751D-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N751D-1 belongs to Microsemi's legacy MIL-PRF-19500/127 qualified Zener diode family, engineered specifically for precision voltage regulation in mission-critical systems where parameter stability and environmental ruggedness are non-negotiable.
FAQ
What is the Zener voltage tolerance of the 1N751D-1?
The 1N751D-1 has a Zener voltage tolerance of ±1%, specified per its "D" suffix in the part nomenclature. This means its actual breakdown voltage falls within 5.049 V to 5.151 V at 49 mA test current and 25°C, enabling high-accuracy voltage referencing unmatched by standard ±5% variants like the 1N751A-1.
Is the 1N751D-1 qualified to military standards?
Yes, the 1N751D-1 is qualified to JANTXV level per MIL-PRF-19500/127. This certification covers rigorous testing for temperature cycling, mechanical shock, vibration, and long-term reliability - confirming its suitability for flight-critical and defense electronics where failure is not an option.
What is the maximum Zener current (IZM) for the 1N751D-1?
The maximum Zener current (IZM) for the 1N751D-1 is 75 mA, derived from its 500 mW power rating and 5.1 V nominal Zener voltage. This value assumes thermal equilibrium at lead temperature TL = 50°C; derating applies above that temperature per Figure 1 in the datasheet.
Does the 1N751D-1 have radiation hardness?
Yes, the 1N751D-1 is inherently radiation-hardened as documented in Microsemi MicroNote 050. Its metallurgically bonded DO-35 structure exhibits robust performance under total ionizing dose (TID) exposure, making it appropriate for low-dose space applications where single-event effects are not dominant.
What does the "D" in 1N751D-1 signify?
The "D" in 1N751D-1 denotes ±1% Zener voltage tolerance per the Microsemi part nomenclature guide. It is distinct from "A" (±5%) and "C" (±2%). The "-1" suffix indicates the DO-35 package variant, and absence of "UR" confirms it is not the MELF surface-mount version.
1N751D-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:
- ±1%
- 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)
1N751D-1 FAQ
1.How can I place an order for 1N751D-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N751D-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 1N751D-1 reliable?
The price and inventory of 1N751D-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N751D-1 is usually 5 days.
3.What payment methods are accepted for 1N751D-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N751D-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N751D-1?
1N751D-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N751D-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 1N751D-1?
For technical support, including 1N751D-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N751D-1 requirements.
6.How does Aetrix verify that 1N751D-1 is sourced from the original manufacturer or authorized distributors?
All 1N751D-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 1N751D-1 meets industry standards.
7.What is the process for return or replacement of 1N751D-1?
All 1N751D-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N751D-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 1N751D-1 part is unused and in its original packaging.
Return procedure for 1N751D-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N751D-1 Tags
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MMBZ5240B-7-F
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