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Microchip Technology 1N5262B/TR
- Part No.:
- 1N5262B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5262B/TR.pdf
- Description:
- DIODE ZENER 51V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,776
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Product details
Overview
1N5262B/TR from Microsemi is a 51 V, ±5% 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, and operating across –65°C to +175°C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback loops, and overvoltage protection.
For engineers reviewing the 1N5262B/TR datasheet, 1N5262B/TR pinout, 1N5262B/TR application, or 1N5262B/TR equivalent, key selection factors include its 51 V nominal Zener voltage, 5% tolerance, 125 Ω Zener impedance at 0.25 mA, temperature coefficient of +0.096 %/°C, and DO-35 mechanical compatibility with axial-leaded PCB layouts.
Technical Context
This device operates in reverse-bias breakdown mode with a sharp knee at 2.5 mA test current (IZT), delivering stable regulation across wide current (0.25–20 mA) and temperature (–65°C to +175°C) ranges. Its hermetically sealed glass DO-35 package ensures long-term reliability in harsh environments.
Designed for shunt regulation, the 1N5262B/TR exhibits minimal capacitance (<2 pF typical at 0 V), low forward voltage (≤1.5 V @ 200 mA), and inherent radiation hardness per MicroNote 050 - making it suitable for aerospace, industrial, and military-grade analog subsystems where stability and ESD insensitivity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 51 V @ 2.5 mA - defines regulated output voltage under standard test conditions |
| Zener Tolerance | ±5% (B suffix) - guarantees VZ between 48.45 V and 53.55 V at 25°C |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous thermal load before derating begins |
| Zener Impedance (ZZT) | 125 Ω @ IZK = 0.25 mA - indicates voltage regulation stiffness at low current |
| Temperature Coefficient (αVZ) | +0.096 %/°C - quantifies VZ drift with temperature; positive slope above ~5 V |
| Max Reverse Current (IR) | 0.1 μA @ VR = 38.3 V - confirms low leakage below breakdown threshold |
| Operating Temperature | –65°C to +175°C - enables use in extended industrial, automotive, and aerospace environments |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by a single black 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 (unbanded end) | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode (banded end) | Zener regulation terminal | Applied to regulated voltage node; absorbs excess current to clamp voltage at 51 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and electrical interchangeability with legacy 1N52xx designs |
| RoHS-compliant option (e3 suffix) | Meets environmental compliance without performance trade-offs in regulation accuracy |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly |
| Inherently radiation-hardened | Validated per MicroNote 050 for use in space-qualified and high-reliability systems |
| Tape-and-reel packaging (TR suffix) | Enables automated SMT-compatible placement despite axial-leaded form factor |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback networks. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 51 V setpoint to error amplifier input. Use Value: Maintains ±5% regulation accuracy over –65°C to +175°C and 0.25–20 mA operating range. |
Use Scenario: Limiting transient voltage spikes on DC rails in industrial control modules. IC Role / Device Role / Timing Role: Passive clamping element diverting surge current when rail exceeds 51 V. Use Value: Responds within nanoseconds with <2 pF junction capacitance and 0.1 μA leakage at 38.3 V. |
| Low-Power Analog Reference | Military Screening Support |
|
Use Scenario: Generating stable bias voltages for op-amp comparators or sensor signal conditioning. IC Role / Device Role / Timing Role: Precision Zener reference replacing active references where ultra-low noise is not required. Use Value: Delivers 51 V ±5% with +0.096 %/°C TC and 125 Ω dynamic impedance at 0.25 mA. |
Use Scenario: Meeting MIL-PRF-19500 requirements for JAN/JANTXV-level screening in defense electronics. IC Role / Device Role / Timing Role: Qualified Zener component available with MQ/MV prefixes and "-1" internal bond option. Use Value: Supports full military qualification path while retaining identical 51 V regulation and DO-35 footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5262B | No TR suffix; bulk packaging only; identical electrical specs and DO-35 package | Not optimized for automated pick-and-place; requires manual or tube-based assembly | Select 1N5262B/TR when tape-and-reel delivery and SMT-line compatibility are required |
| MMBZ5262B | SOT-23 surface-mount package; same 51 V/±5%/500 mW rating but lower thermal resistance (350°C/W) | Better suited for space-constrained PCBs; requires reflow profile adjustment vs. axial-leaded hand-soldering | Choose MMBZ5262B for high-density layouts where DO-35 lead spacing is prohibitive |
Compared with 1N5262B/TR, the 1N5262B lacks tape-and-reel support but offers identical regulation performance, while MMBZ5262B trades axial-mount simplicity for SMT scalability and slightly different thermal behavior - both require layout and assembly process validation.
Availability
1N5262B/TR is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power analog reference applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5262B/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 (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 1N52xxB series belongs to Microsemi's legacy Zener diode product line, engineered for precision voltage regulation in mission-critical systems where long-term stability, wide temperature operation, and ESD immunity are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5262B/TR?
The 1N5262B/TR has a nominal Zener voltage of 51 V with a ±5% tolerance, as designated by the "B" suffix per JEDEC standards. This means its actual breakdown voltage falls between 48.45 V and 53.55 V at 25°C and 2.5 mA test current, verified per Microsemi's published electrical characteristics table.
What package type and marking does the 1N5262B/TR use?
The 1N5262B/TR uses the DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode identified by a single black band. It is marked with the full part number "1N5262B" and supplied in tape-and-reel format per EIA-296, as indicated by the "TR" suffix.
How does the temperature coefficient affect the 1N5262B/TR's regulation accuracy?
The 1N5262B/TR has a temperature coefficient of +0.096 %/°C, meaning its Zener voltage increases by approximately 48.96 mV per °C rise above 25°C. Over the full –65°C to +175°C range, this results in a total VZ shift of roughly ±15.2 V, which must be accounted for in high-precision reference designs.
Can the 1N5262B/TR be used in military-grade applications?
Yes - the 1N5262B/TR can be ordered with military screening prefixes (e.g., MV1N5262B/TR for JANTXV level) per MIL-PRF-19500, and supports optional internal bonds ("-1" suffix). Its inherent radiation hardness (per MicroNote 050) and ESD insensitivity (MIL-STD-750 Method 1020) further validate its suitability for defense systems.
What is the maximum power dissipation and derating behavior of the 1N5262B/TR?
The 1N5262B/TR is rated for 500 mW at 25°C, with linear derating to zero at 175°C ambient. Its thermal resistance is 250°C/W junction-to-lead (at 3/8″ lead length) or 310°C/W junction-to-ambient on FR4 board - requiring heatsinking or current limiting above 70°C to maintain safe junction temperatures.
1N5262B/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):
- 51 V
- Tolerance:
- ±5%
- 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)
1N5262B/TR FAQ
1.How can I place an order for 1N5262B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5262B/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 1N5262B/TR reliable?
The price and inventory of 1N5262B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5262B/TR is usually 5 days.
3.What payment methods are accepted for 1N5262B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5262B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5262B/TR?
1N5262B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5262B/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 1N5262B/TR?
For technical support, including 1N5262B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5262B/TR requirements.
6.How does Aetrix verify that 1N5262B/TR is sourced from the original manufacturer or authorized distributors?
All 1N5262B/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 1N5262B/TR meets industry standards.
7.What is the process for return or replacement of 1N5262B/TR?
All 1N5262B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5262B/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 1N5262B/TR part is unused and in its original packaging.
Return procedure for 1N5262B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5262B/TR Tags
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