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Microchip Technology 1N5262A
- Part No.:
- 1N5262A
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5262A.pdf
- Description:
- DIODE ZENER 51V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,383
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Product details
Overview
1N5262A from Microsemi is a 51 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 2.5 mA test current, 125 Ω dynamic impedance at IZK = 0.25 mA, and operating across –65°C to +175°C - used for precision voltage reference and low-power regulation in analog sensor signal conditioning circuits.
For engineers reviewing the 1N5262A datasheet, 1N5262A pinout, 1N5262A application, or 1N5262A equivalent, key selection criteria include Zener voltage tolerance, temperature coefficient (+0.096 %/°C), thermal resistance (250 °C/W junction-to-lead), reverse leakage (<0.1 μA at 38.3 V), and DO-35 mechanical compatibility with through-hole PCB layouts.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 51 V nominal Zener voltage is specified at 2.5 mA test current (IZT), with dynamic impedance measured at both IZT and IZK = 0.25 mA to ensure sharp knee characteristics and unit stability.
The device features a hermetically sealed glass DO-35 package with tin-lead or RoHS-compliant matte-tin plating, cathode band marking, and JEDEC-registered construction. It exhibits minimal capacitance (typ. <2 pF), ESD insensitivity per MIL-STD-750 Method 1020, and inherent radiation hardness per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 51 V @ IZT = 2.5 mA - defines regulated output voltage under standard test condition |
| Zener Tolerance | ±10% (A suffix) - sets absolute voltage deviation bounds for design margining |
| Power Dissipation | 0.5 W at 25°C, derated linearly above 50°C lead temperature - limits continuous thermal stress |
| Zener Impedance (ZZK) | 125 Ω @ IZK = 0.25 mA - determines regulation stiffness near knee region |
| Reverse Leakage (IR) | <0.1 μA @ VR = 38.3 V - ensures minimal standby current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.096 %/°C - quantifies voltage drift over temperature for accuracy-critical references |
| Operating Temperature | –65°C to +175°C - supports aerospace, downhole, and industrial environments |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package: hermetically sealed, cathode indicated by single black band; leads are tinned copper alloy, solderable per MIL-STD-750 Method 2026; weight 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; forward voltage ≤1.5 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulation polarity |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered construction | Ensures mechanical and electrical interchangeability across qualified suppliers |
| Minimal capacitance | Typ. <2 pF - preserves high-frequency signal integrity in RF bias and timing circuits |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for space-qualified designs |
| ESD insensitivity | Qualified per MIL-STD-750 Method 1020 - eliminates need for external ESD protection |
| Tight thermal resistance | 250 °C/W junction-to-lead at 10 mm lead length - enables reliable power handling without heatsinking |
Applications
| Industrial Sensor Reference | Low-Power Voltage Clamp |
|---|---|
Use Scenario: Providing stable 51 V reference for 4–20 mA transmitter loop-powered sensors in oil & gas field instruments. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and overvoltage clamp on analog front-end supply rail. Use Value: Maintains reference accuracy within ±10% over –40°C to +85°C ambient while dissipating <0.3 W under normal operation. |
Use Scenario: Clamping transient spikes on 48 V telecom power rails to protect downstream DC-DC converters. IC Role / Device Role / Timing Role: Shunt regulator limiting rail voltage to 51 V during surge events. Use Value: Withstands 0.5 W peak dissipation and <0.1 μA leakage at 38.3 V, minimizing standby loss and enabling fast recovery. |
| High-Temperature Downhole Electronics | Aerospace Power Monitoring |
Use Scenario: Voltage reference in borehole pressure transducers operating continuously at +150°C ambient. IC Role / Device Role / Timing Role: Primary Zener reference for ADC biasing and excitation current regulation. Use Value: Guaranteed operation to +175°C junction temperature with +0.096 %/°C tempco - reduces calibration drift vs. silicon alternatives. |
Use Scenario: Overvoltage detection in satellite power distribution units monitoring 28 V bus health. IC Role / Device Role / Timing Role: Zener-based comparator threshold element in fault-detection circuitry. Use Value: Radiation-hardened construction and MIL-PRF-19500 screening options (e.g., JANTXV-1N5262A) support mission-critical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | 51 V, ±5%, 1 W, DO-41 package; 17 Ω ZZT @ 49 mA; higher power but larger footprint | Preferred where higher surge energy absorption or tighter tolerance required; not drop-in due to DO-41 size | Select when board layout allows larger axial package and >0.5 W transient dissipation is needed |
| BZX55C51 (Vishay) | 51 V, ±5%, 500 mW, DO-35; 100 Ω ZZK @ 0.25 mA; tighter tolerance but different tempco (+0.08 %/°C) | Better voltage stability over temperature range; RoHS-compliant standard offering | Choose for commercial-grade designs requiring ±5% tolerance and verified RoHS compliance without military screening |
Compared with 1N5262A, the 1N4733A offers higher power and lower impedance but requires PCB rework for DO-41 mounting, while BZX55C51 delivers tighter tolerance and lower ZZK at identical power and package - making it preferable for cost-sensitive, non-military applications demanding improved regulation precision.
Availability
1N5262A is available at Aetrix Electronics and suitable for industrial sensor reference, low-power voltage clamp, and high-temperature downhole electronics requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for 1N5262A 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 analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxA series belongs to Microsemi's legacy DO-35 Zener diode product line, engineered for precision voltage regulation in harsh-environment applications where wide temperature range, radiation tolerance, and long-term stability are critical.
FAQ
What is the Zener voltage tolerance of the 1N5262A?
The 1N5262A has a nominal Zener voltage of 51 V with a guaranteed tolerance of ±10%, as indicated by the "A" suffix per Microsemi's datasheet. This tolerance applies across the full operating temperature range and is verified at 2.5 mA test current (IZT). The 1N5262A is not rated for tighter tolerances - those require C (±2%) or D (±1%) suffix variants.
Does the 1N5262A have a specified Zener impedance at IZT?
No - the 1N5262A datasheet specifies Zener impedance only at IZK = 0.25 mA (ZZK = 125 Ω), not at IZT. Dynamic impedance at IZT is not published for this variant. Designers should use the 125 Ω value for knee-region regulation analysis and verify stability under actual operating currents using the provided derating curves and thermal resistance data.
Can the 1N5262A be used in surface-mount designs?
No - the 1N5262A is exclusively offered in the axial-leaded DO-35 (DO-204AH) glass package and is not compatible with SMT assembly. For surface-mount equivalents, Microsemi offers the MLL5262A in DO-213AA (MELF) package; however, that part requires separate qualification for thermal and mechanical performance in reflow profiles.
What is the maximum reverse leakage current for the 1N5262A?
The 1N5262A has a maximum reverse leakage current (IR) of 0.1 μA when tested at VR = 38.3 V (75% of nominal VZ), per the Microsemi datasheet. This value is confirmed for all A-suffix parts in the 1N52xx series and reflects worst-case leakage under specified test conditions - critical for ultra-low-power bias networks.
Is the 1N5262A suitable for aerospace applications?
Yes - the base 1N5262A can be screened to JAN, JANTX, JANTXV, or JANS levels per MIL-PRF-19500 by adding MQ, MX, MV, or MSP prefixes respectively (e.g., MV1N5262A). These versions include extended testing for temperature cycling, burn-in, and parameter verification - fulfilling requirements for flight-critical and satellite power systems.
1N5262A 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):
- 51 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 39 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)
1N5262A FAQ
1.How can I place an order for 1N5262A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5262A 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 1N5262A reliable?
The price and inventory of 1N5262A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5262A is usually 5 days.
3.What payment methods are accepted for 1N5262A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5262A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5262A?
1N5262A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5262A 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 1N5262A?
For technical support, including 1N5262A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5262A requirements.
6.How does Aetrix verify that 1N5262A is sourced from the original manufacturer or authorized distributors?
All 1N5262A 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 1N5262A meets industry standards.
7.What is the process for return or replacement of 1N5262A?
All 1N5262A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5262A, 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 1N5262A part is unused and in its original packaging.
Return procedure for 1N5262A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5262A Tags
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