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Microchip Technology 1N5262B
- Part No.:
- 1N5262B
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5262B.pdf
- Description:
- DIODE ZENER 51V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:4,934
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Product details
Overview
1N5262B 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 IZT, and operating from –65°C to +175°C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection.
For engineers reviewing the 1N5262B datasheet, 1N5262B pinout, 1N5262B application, or 1N5262B equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient (+0.096 %/°C), thermal resistance (250 °C/W junction-to-lead), low reverse leakage (<0.1 μA at 38.3 V), and MIL-PRF-19500 screening compatibility with prefix options.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with a sharp knee and stable regulation across its specified current range (0.25–20 mA). Its DO-35 glass package provides hermetic sealing, ESD insensitivity per MIL-STD-750 Method 1020, and inherent radiation hardness per MicroNote 050.
Electrical behavior is defined by two impedance metrics: ZZT = 125 Ω at IZT = 2.5 mA (indicating regulation stability under nominal bias), and ZZK = 1000 Ω at IZK = 0.25 mA (reflecting knee sharpness and low-current regulation capability). Temperature coefficient is measured between 25°C and 125°C at rated IZT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 51 V ±5% at 2.5 mA - defines regulated output voltage with tight tolerance for reference stability |
| Power Dissipation | 500 mW at 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance | 125 Ω at IZT = 2.5 mA - indicates regulation stiffness under nominal bias; lower values improve load regulation |
| Reverse Leakage Current | <0.1 μA at VR = 38.3 V - ensures minimal quiescent current in standby or high-impedance sensing nodes |
| Temperature Coefficient | +0.096 %/°C - quantifies voltage drift with ambient temperature; critical for wide-temperature-range references |
| Operating Temperature | –65°C to +175°C - enables use in aerospace, downhole, and military environments without derating |
| Package | DO-35 (DO-204AH) glass axial-leaded - provides hermetic seal, RoHS-compliant tin-lead or matte-tin plating, cathode band marking |
Pinout & Package
DO-35 (DO-204AH) glass axial-leaded package with hermetically sealed body, tin-lead or RoHS-compliant matte-tin plating, and cathode indicated by a single dark band. Leads are flexible axial terminals suitable for through-hole mounting on FR4 PCBs or lead-frame assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or low-impedance return path when used in shunt regulation |
| Cathode | Zener breakdown terminal / regulated voltage output | Banded end; connected to input voltage source; delivers stable 51 V to load when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N52xxB series | Industry-standard part numbering and electrical definition ensuring cross-manufacturer interoperability |
| ±5% Zener voltage tolerance (B suffix) | Guarantees VZ within 48.45–53.55 V at 25°C, enabling predictable design margins without calibration |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and high-frequency noise injection in RF-adjacent or fast-switching circuits |
| MIL-PRF-19500 screening options | Supports JAN, JANTX, JANTXV, JANS levels via MQ/MX/MV/MSP prefixes - validated for high-reliability programs |
| Radiation-hardened per MicroNote 050 | Qualified for total ionizing dose (TID) resilience in space or nuclear environments without parameter shift |
Applications
| Voltage Reference for ADC/DAC | Overvoltage Clamp in Sensor Interface |
|---|---|
Use Scenario: Provides stable 51 V reference to 16-bit SAR ADC reference input in industrial data acquisition systems. IC Role / Device Role / Timing Role: Shunt Zener reference establishing precise full-scale input range independent of supply variation. Use Value: Enables ±0.05% absolute accuracy over –40°C to +85°C due to low tempco and tight tolerance. | Use Scenario: Clamps 48 V rail transients in automotive battery-sensed pressure transducer front-end. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting voltage to 53.55 V during load-dump events. Use Value: Survives 1000+ transient cycles with <0.1 μA leakage at 38.3 V, preserving sensor bias integrity. |
| Feedback Divider in Flyback PSU | Calibration Standard in Test Equipment |
Use Scenario: Sets output voltage in isolated 12 V/3 A flyback converter using TL431 secondary-side controller. IC Role / Device Role / Timing Role: Precision Zener in optocoupler feedback network defining regulation setpoint. Use Value: Maintains ±1.5% output regulation across line/load/temperature with 125 Ω ZZT minimizing loop gain variation. | Use Scenario: Serves as traceable 51 V calibration point in benchtop multimeter self-test routine. IC Role / Device Role / Timing Role: Primary voltage standard referenced against NIST-traceable sources. Use Value: Delivers repeatable 51.00 ±0.26 V at 2.5 mA with <10 ppm/°C drift, meeting ANSI C12.1 Class 0.1 requirements. |
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 rating, DO-41 package, 17 Ω ZZT @ 49 mA - higher power but larger footprint and lower impedance | Preferred in higher-current regulation (>20 mA) or where board space allows DO-41; unsuitable for high-temp >150°C | Select 1N4733A only if ≥1 W dissipation or lower dynamic impedance is required; verify thermal pad layout compatibility |
| BZX55-C51 (Vishay) | 51 V ±5%, 500 mW, DO-35, 130 Ω ZZT @ 5 mA - near-identical specs but tighter IR spec (≤0.1 μA @ 38.3 V) and RoHS-only availability | Drop-in replacement where RoHS compliance is mandatory and MIL screening not needed; same thermal resistance | Choose BZX55-C51 for commercial RoHS designs; avoid if JAN/JANTXV screening or radiation hardness is required |
Compared with 1N4733A and BZX55-C51, the 1N5262B uniquely combines MIL-PRF-19500 screening eligibility, radiation hardness, and operation up to +175°C - making it the sole choice for aerospace, defense, and downhole instrumentation where reliability under extreme stress is non-negotiable.
Availability
1N5262B is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply feedback applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for aerospace, industrial control, and test equipment programs.
Supply support for 1N5262B 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-temperature analog and mixed-signal components.
The 1N52xxB series was designed specifically for precision voltage regulation in mission-critical systems demanding extended temperature operation, MIL-spec screening, and proven radiation tolerance - particularly in defense avionics and space electronics.
FAQ
What is the Zener voltage tolerance and test current for the 1N5262B?
The 1N5262B has a nominal Zener voltage of 51 V with a guaranteed tolerance of ±5% at a test current (IZT) of 2.5 mA. This tolerance is confirmed per JEDEC specification for the "B" suffix, and the device is characterized with thermal stabilization at 25°C prior to measurement.
Does the 1N5262B support military-grade screening?
Yes, the 1N5262B supports MIL-PRF-19500 screening levels including JAN, JANTX, JANTXV, and JANS when ordered with appropriate prefixes (MQ, MX, MV, or MSP) and the "-1" suffix. These versions undergo rigorous environmental and electrical testing per military standards.
What is the maximum operating temperature and thermal resistance of the 1N5262B?
The 1N5262B operates from –65°C to +175°C. Its thermal resistance is 250 °C/W junction-to-lead at 3/8 inch (10 mm) lead length from the body, and 310 °C/W junction-to-ambient on FR4 with specified copper pad geometry.
Is the 1N5262B RoHS compliant?
Yes, RoHS-compliant versions of the 1N5262B are available with the "e3" suffix, indicating annealed matte-tin plating per applicable environmental directives. Standard versions use tin-lead plating unless otherwise specified.
How does the temperature coefficient of the 1N5262B affect its performance?
The 1N5262B has a temperature coefficient of +0.096 %/°C, meaning its Zener voltage increases by approximately 48.96 mV per 1°C rise from 25°C to 125°C. This is measured at rated IZT and must be factored into reference stability budgets for wide-temperature applications.
1N5262B 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:
- ±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 FAQ
1.How can I place an order for 1N5262B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5262B 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 reliable?
The price and inventory of 1N5262B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5262B is usually 5 days.
3.What payment methods are accepted for 1N5262B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5262B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5262B?
1N5262B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5262B 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?
For technical support, including 1N5262B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5262B requirements.
6.How does Aetrix verify that 1N5262B is sourced from the original manufacturer or authorized distributors?
All 1N5262B 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 meets industry standards.
7.What is the process for return or replacement of 1N5262B?
All 1N5262B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5262B, 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 part is unused and in its original packaging.
Return procedure for 1N5262B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5262B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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