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onsemi 1N5262B
- Part No.:
- 1N5262B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5262B.pdf
- Description:
- DIODE ZENER 51V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
1N5262B from Fairchild Semiconductor is a 5.1 V ±5% tolerance, 500 mW glass-encapsulated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers 51 V nominal Zener voltage at 2.5 mA test current with 125 Ω dynamic impedance and exhibits a temperature coefficient of +0.096 %/°C.
For engineers reviewing the 1N5262B datasheet, pinout, applications, or equivalent options, this device is selected for stable low-current voltage clamping, IC biasing, and calibration references where tight tolerance, hermetic glass packaging, and predictable TC behavior are required.
Technical Context
The 1N5262B operates as a two-terminal silicon Zener diode with avalanche breakdown mechanism, optimized for operation at IZ = 2.5 mA. Its DO-35 glass package ensures hermetic sealing and thermal stability across -65°C to +200°C junction temperature range.
It features a forward voltage ≤1.2 V at 200 mA, reverse leakage ≤0.1 μA at 39 V, and a maximum power dissipation of 500 mW derated linearly above 50°C at 4.0 mW/°C - enabling reliable use in compact, non-heatsinked designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.45 V (min) to 53.55 V (max) at IZ = 2.5 mA - defines precise clamping threshold for 51 V nominal regulation |
| Zener Impedance (ZZ) | 125 Ω (max) at IZ = 2.5 mA - determines output voltage variation under load changes |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous DC power handling without heatsinking |
| Temperature Coefficient (TC) | +0.096 %/°C - quantifies positive drift of VZ per degree rise, critical for temperature-stable references |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 39 V - ensures minimal error current in high-impedance bias networks |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - supports bidirectional protection or dual-use in clamp-and-rectify topologies |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter × 4.56 mm length, cathode indicated by color band. Total weight: 0.137 g. JEDEC DO-204AH compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Enables standard diode conduction or serves as reference ground return path in shunt regulator |
| Cathode | Current exit terminal in forward bias; connected to higher-potential node in Zener mode | Provides regulated output node; marked by visible color band for polarity identification |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures predictable clamping within 2.55 V window around 51 V, reducing need for post-calibration trimming |
| Hermetic glass DO-35 package | Guarantees long-term parameter stability and moisture resistance in industrial environments |
| Low reverse leakage (≤0.1 μA) | Minimizes loading error in high-impedance voltage divider or op-amp reference circuits |
| Controlled positive temperature coefficient (+0.096 %/°C) | Allows predictable compensation when paired with negative-TC components in precision references |
| Rated for -65°C to +200°C operation | Supports deployment in extended-temperature automotive or downhole instrumentation without derating |
Applications
| Industrial Power Supply Feedback | Microcontroller Voltage Reference |
|---|---|
Use Scenario: Shunt regulator in isolated flyback auxiliary winding feedback network. IC Role / Device Role / Timing Role: Zener reference providing stable 51 V threshold to optocoupler LED drive circuit. Use Value: Maintains ±1% output regulation across line/load variations due to tight VZ tolerance and low ZZ. |
Use Scenario: External reference for 12-bit ADC in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Precision voltage source replacing internal bandgap to improve measurement accuracy. Use Value: Delivers <0.01% drift over 0–70°C via matched TC pairing with op-amp compensation network. |
| Overvoltage Clamp for Sensor Interface | Calibration Standard in Test Equipment |
Use Scenario: Protection element on 4–20 mA current loop transmitter output against transient surges. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 53.55 V during ESD or inductive kick events. Use Value: Prevents damage to downstream DAC or isolation amplifier with sub-10 ns response and no latch-up risk. |
Use Scenario: Factory-trimmed reference in handheld multimeter's DC voltage measurement range. IC Role / Device Role / Timing Role: Primary voltage standard traceable to NIST via calibrated Zener stack configuration. Use Value: Enables 0.1% full-scale accuracy over 2-year calibration interval using hermetic DO-35 stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | 5.1 V nominal, ±5%, 1 W rating, DO-41 package, ZZ = 17 Ω @ 45 mA | Higher power and lower ZZ, but larger footprint and different thermal mass | Select when >500 mW dissipation or lower dynamic impedance is required; not drop-in due to DO-41 vs. DO-35 |
| BZX55-C51 (Vishay) | 51 V nominal, ±5%, 500 mW, DO-35, ZZ = 130 Ω @ 2.5 mA, TC = +0.09 %/°C | Nearly identical electrical specs and package; minor TC variance (0.09 vs. 0.096 %/°C) | Valid alternative for board-level replacement where Vishay sourcing is preferred; same pinout and layout |
Compared with 1N5262B, the 1N4733A offers higher power and lower impedance but requires PCB redesign, while BZX55-C51 provides functionally identical performance in the same DO-35 package with negligible TC deviation - making it the most seamless alternative for continuity-driven designs.
Availability
1N5262B is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface protection, microcontroller reference circuits, and calibration equipment requiring stable component supply with full traceability and lifecycle support.
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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, signal conditioning, and discrete components before its acquisition by ON Semiconductor in 2016.
The 1N52xxB series was developed as a precision, hermetically sealed Zener family for analog reference and regulation in commercial and industrial systems demanding long-term stability and tight tolerances.
FAQ
What is the nominal Zener voltage of the 1N5262B?
The 1N5262B has a nominal Zener voltage of 51 V, with a guaranteed range of 48.45 V (minimum) to 53.55 V (maximum) at a test current of 2.5 mA. This value is specified under thermal equilibrium conditions at lead temperature of 30°C ±1°C, per Fairchild's characterization methodology. The 1N5262B maintains this specification across its qualified operating temperature range.
Is the 1N5262B suitable for surface-mount assembly?
No, the 1N5262B uses a through-hole DO-35 glass axial package with 0.46 mm diameter leads and 2.0 mm body diameter, requiring axial insertion and wave or hand soldering. It is not compatible with reflow or pick-and-place SMT processes. For SMT alternatives, consider SOD-123 or SOD-323 packaged Zeners with equivalent voltage ratings.
What is the maximum reverse leakage current for the 1N5262B?
The 1N5262B specifies a maximum reverse leakage current (IR) of 0.1 μA at VR = 39 V, measured at TA = 25°C. This ultra-low leakage supports high-impedance reference networks and minimizes error in precision analog circuits. Leakage remains below 1 μA up to rated VZ max under normal operating conditions.
Does the 1N5262B have a specified forward voltage?
Yes, the 1N5262B has a maximum forward voltage (VF) of 1.2 V at IF = 200 mA, as stated in the Absolute Maximum Ratings section. This parameter confirms usability in bidirectional clamp configurations or as a standard rectifier in low-current paths, though its primary design intent remains Zener regulation in reverse bias.
How does temperature affect the Zener voltage of the 1N5262B?
The 1N5262B exhibits a positive temperature coefficient of +0.096 %/°C, meaning its Zener voltage increases by approximately 48.96 mV per °C rise above 25°C. This behavior is fully characterized and repeatable, enabling accurate thermal compensation in reference designs. The 1N5262B remains functional from -65°C to +200°C junction temperature.
1N5262B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 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
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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