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Microchip Technology 1N5272A
- Part No.:
- 1N5272A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5272A.pdf
- Description:
- DIODE ZENER 110V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,753
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Product details
Overview
1N5272A from Microsemi is a 500 mW glass axial-lead Zener diode with nominal Zener voltage of 110 V, ±10% tolerance (A suffix), 1.1 mA test current, and 750 Ω maximum Zener impedance at IZK = 0.25 mA. It operates from –65°C to +175°C and regulates voltage in low-current reference and protection circuits.
For engineers reviewing the 1N5272A datasheet, 1N5272A pinout, 1N5272A application, or 1N5272A equivalent, this part serves as a precision voltage clamp in power supply feedback paths, overvoltage protection networks, and analog reference shunts where stable high-voltage regulation at low current is required.
Technical Context
The 1N5272A is a single-junction, silicon planar Zener diode operating in reverse breakdown mode. Its regulation relies on controlled avalanche mechanism above ~7 V, confirmed by its positive temperature coefficient (+0.110 %/°C) and high Zener impedance (750 Ω at 0.25 mA).
It is rated for 0.5 W steady-state dissipation at 25°C with 250 °C/W junction-to-lead thermal resistance (3/8" lead length), and exhibits <0.1 μA max reverse leakage at VR = 88 V - consistent with JEDEC 1N52xxA series specifications for ±10% tolerance devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 110 V @ IZT = 1.1 mA - defines primary regulation point under standard test conditions |
| Zener Tolerance | ±10% (A suffix) - guarantees VZ between 99 V and 121 V at 25°C |
| Zener Impedance | 750 Ω max @ IZK = 0.25 mA - indicates dynamic resistance affecting regulation stability under light load |
| Power Dissipation | 500 mW at 25°C - sets absolute maximum continuous power before thermal derating applies |
| Operating Temperature | –65°C to +175°C - enables use in aerospace, downhole, and industrial environments without derating |
| Reverse Leakage | ≤0.1 μA @ VR = 88 V - ensures minimal standby current in high-impedance bias networks |
| Temp. Coefficient | +0.110 %/°C - quantifies VZ drift with temperature; requires compensation in precision references |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode band marking. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground or low-potential node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation output node | Banded end; clamps voltage to 110 V when reverse current ≥1.1 mA flows through it |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxA series | Ensures cross-manufacturer compatibility and standardized electrical limits per JESD370B |
| Radiation-hardened construction | Inherently radiation tolerant per MicroNote 050 - suitable for space-grade and nuclear instrumentation |
| Nonsensitive to ESD | Qualified to MIL-STD-750 Method 1020 - no special handling required during assembly |
| Minimal capacitance | Typical CJ < 2 pF (per Figure 2) - preserves high-frequency response in RF detector and timing circuits |
| Flexible axial-lead mounting | Supports through-hole insertion, chassis mounting, or point-to-point wiring without stress on glass body |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in discrete linear regulators using TL431 alternatives or op-amp-based feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 110 V setpoint for error amplifier comparison. Use Value: Enables accurate regulation without integrated reference ICs; leverages high-temperature capability for industrial SMPS auxiliary supplies. |
Use Scenario: Protecting downstream circuitry from transient surges exceeding 110 V in DC bus monitoring systems. IC Role / Device Role / Timing Role: Passive crowbar element that conducts only when input exceeds 110 V ±10%. Use Value: Low-cost, robust clamping with negligible standby leakage (<0.1 μA) and no active control needed. |
| Analog Reference Source | High-Voltage Bias Network |
Use Scenario: Generating stable bias voltages for photomultiplier tube (PMT) dynode chains or ionization chamber amplifiers. IC Role / Device Role / Timing Role: Precision shunt reference delivering regulated 110 V across high-impedance loads. Use Value: Maintains regulation over –65°C to +175°C range; avoids drift-induced gain errors in scientific instrumentation. |
Use Scenario: Setting fixed bias points in vacuum tube amplifier stages or high-voltage sensor interfaces. IC Role / Device Role / Timing Role: Voltage divider stabilizer ensuring consistent grid or plate voltage despite supply variation. Use Value: Glass DO-35 package withstands high electric field stress; low capacitance prevents signal coupling in sensitive analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5272B | ±5% tolerance (vs. ±10% for 1N5272A); same VZ, IZT, and package | Tighter regulation required in metrology-grade references or calibration equipment | Select 1N5272B when absolute voltage accuracy outweighs cost sensitivity |
| MMBZ5272B (SOT-23) | Surface-mount MELF-equivalent; 110 V, ±5%, 200 mW rating, smaller footprint | Used in space-constrained PCBs where axial leads are impractical | Choose MMBZ5272B for automated assembly and compact designs; verify thermal derating on FR4 |
Compared with 1N5272A, the 1N5272B offers improved voltage accuracy at identical thermal and electrical operating points, while the MMBZ5272B trades power rating and leaded reliability for SMT manufacturability - both require revalidation of layout and thermal management.
Availability
1N5272A is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage monitors, and high-reliability analog instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5272A 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components.
The 1N52xxA series was designed for military, aerospace, and industrial applications demanding wide temperature operation, ESD immunity, and long-term parametric stability in harsh environments.
FAQ
What is the Zener voltage tolerance of the 1N5272A?
The 1N5272A has a nominal Zener voltage of 110 V with ±10% tolerance, meaning its actual breakdown voltage falls between 99 V and 121 V at 25°C and IZT = 1.1 mA. This tolerance is defined by the "A" suffix per JEDEC standards and applies to all units within the 1N5272A lot. The 1N5272A does not guarantee tighter limits unless screened to JAN/JANTX levels.
Can the 1N5272A be used in surface-mount designs?
No - the 1N5272A uses a DO-35 glass axial-leaded package and is not compatible with SMT assembly. For surface-mount equivalents, consider the MLL5272B (DO-213AA MELF) or MMBZ5272B (SOT-23), both offering 110 V regulation but with lower power ratings and different thermal profiles. The 1N5272A requires through-hole mounting with ≥3/8" lead length for rated 500 mW dissipation.
What is the maximum reverse leakage current for the 1N5272A?
The 1N5272A specifies ≤0.1 μA maximum reverse leakage current at VR = 88 V (80% of nominal VZ). This value is measured after device stabilization per Note 1 and reflects low standby loss critical for high-impedance reference networks. Leakage remains below 1 μA up to 100 V, making the 1N5272A suitable for battery-powered or ultra-low-power bias applications.
How does temperature affect the 1N5272A's Zener voltage?
The 1N5272A has a temperature coefficient of +0.110 %/°C, meaning its Zener voltage increases by approximately 0.121 V per 10°C rise above 25°C. This behavior is typical for avalanche-mode Zeners above 7 V and must be accounted for in precision references. The 1N5272A maintains regulation integrity across –65°C to +175°C, but system-level compensation may be needed for sub-0.1% accuracy.
Is the 1N5272A suitable for high-reliability aerospace applications?
Yes - the 1N5272A is JEDEC-registered and available in MIL-PRF-19500 screening levels (e.g., JANTXV-1N5272A) with enhanced testing for vibration, thermal shock, and parametric stability. Its inherent radiation hardness (per MicroNote 050), ESD immunity (MIL-STD-750 Method 1020), and wide operating temperature range make the 1N5272A appropriate for satellite power systems and avionics voltage supervision where failure modes must be rigorously controlled.
1N5272A 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):
- 110 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 750 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 80 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5272A FAQ
1.How can I place an order for 1N5272A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5272A 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 1N5272A reliable?
The price and inventory of 1N5272A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5272A is usually 5 days.
3.What payment methods are accepted for 1N5272A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5272A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5272A?
1N5272A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5272A 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 1N5272A?
For technical support, including 1N5272A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5272A requirements.
6.How does Aetrix verify that 1N5272A is sourced from the original manufacturer or authorized distributors?
All 1N5272A 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 1N5272A meets industry standards.
7.What is the process for return or replacement of 1N5272A?
All 1N5272A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5272A, 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 1N5272A part is unused and in its original packaging.
Return procedure for 1N5272A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5272A Tags
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