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onsemi 1N5262B_T50R
- Part No.:
- 1N5262B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5262B_T50R.pdf
- Description:
- DIODE ZENER 51V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
1N5262B_T50R from ON Semiconductor is a 51 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation, 125 Ω dynamic impedance at 20 mA test current, and 0.1 μA reverse leakage at 39 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5262B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode identification, and direct alternatives for voltage reference design and supply rail clamping.
Technical Context
The 1N5262B_T50R operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 51 V. Its junction temperature range spans −65 °C to +200 °C, and it exhibits a positive temperature coefficient of +0.096 %/°C - critical for stable biasing in temperature-varying environments.
Designed for DC voltage regulation and transient suppression, it requires no external biasing circuitry and functions with forward voltage ≤1.2 V at 200 mA. The DO-35 hermetically sealed glass package ensures long-term stability and low leakage under humid or high-reliability conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V nominal, ±5% tolerance - defines precise clamping level for 39–53 V operating window |
| Test Current (IZ) | 20 mA - standard condition for VZ measurement and impedance characterization |
| Zener Impedance (ZZ) | 125 Ω at IZ = 20 mA - indicates regulation stiffness; lower values improve load regulation |
| Reverse Leakage (IR) | 0.1 μA at VR = 39 V - confirms minimal standby current in high-impedance sensing nodes |
| Power Dissipation (PD) | 500 mW at TA = 50 °C - sets maximum continuous power before thermal derating begins |
| Temperature Coefficient | +0.096 %/°C - quantifies VZ drift per degree; enables compensation in precision references |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - ensures low-loss conduction when used bidirectionally or in series with other devices |
Pinout & Package
DO-35 glass axial package with cathode identified by color band; leads are tinned copper alloy, 0.533 mm diameter, 4.56 mm body length, 3.05 mm body diameter, and 1.91 mm lead spacing. Hermetically sealed per JEDEC DO-204AH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in Zener mode | Accepts up to 200 mA forward current; must be referenced to ground or common return for regulation |
| Cathode | Negative terminal in forward bias; higher-potential node in Zener breakdown | Marked by color band; connects to regulated output or protected rail; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables use without post-manufacturing trimming in cost-sensitive voltage reference designs |
| Hermetic DO-35 glass package | Prevents moisture ingress and parameter drift over time - essential for automotive and industrial field life |
| Low 0.1 μA leakage at 39 V | Minimizes error in high-impedance feedback networks and battery-powered sensor biasing |
| +0.096 %/°C tempco | Supports predictable VZ shift across −65 °C to +200 °C, enabling first-order thermal compensation |
| 500 mW rating with 4.0 mW/°C derating | Allows safe operation up to 175 °C ambient when mounted on thermally optimized PCBs |
Applications
| Industrial Sensor Reference | Power Supply Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 51 V reference for 16-bit ADC biasing in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, sourcing current into op-amp buffer input. Use Value: ±5% VZ tolerance and +0.096 %/°C tempco ensure <0.5% total reference error across −40 °C to +85 °C operating range. | Use Scenario: Clamping 48 V telecom power rail against surges exceeding 53 V during hot-swap events. IC Role / Device Role / Timing Role: Two-terminal shunt protector placed between rail and ground, conducting only above 51 V. Use Value: 125 Ω ZZ limits clamp voltage rise to <52.5 V at 20 mA surge, protecting downstream DC-DC converters. |
| Automotive ECU Bias Network | Medical Instrument Calibration Source |
Use Scenario: Generating fixed 51 V bias for photodiode transimpedance amplifier in vehicle LiDAR receiver front-end. IC Role / Device Role / Timing Role: Precision Zener supplying stable bias to op-amp non-inverting input. Use Value: 0.1 μA leakage prevents loading of high-Z photodiode node, preserving signal integrity and SNR. | Use Scenario: Serving as traceable calibration voltage source in portable blood glucose meter analog front-end. IC Role / Device Role / Timing Role: Primary shunt reference in factory-calibrated voltage divider network. Use Value: Hermetic DO-35 package ensures <10 ppm/year VZ drift, meeting ISO 13485 long-term stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5262BRLG | Same 51 V rating, DO-35 package, but marked with "RLG" suffix indicating RoHS-compliant lead finish | No functional difference; selected when Pb-free compliance is mandatory per J-STD-609 | Direct replacement where RoHS certification is required; identical electrical specs and thermal behavior |
| BZX55-C51 | 51 V Zener, ±5%, but in DO-35 package with 600 mW rating and 150 Ω ZZ at 5 mA | Higher ZZ and different test current reduce regulation accuracy in precision references | Use only in non-critical clamping; not recommended for reference-grade designs requiring tight VZ stability |
Compared with 1N5262B_T50R, 1N5262BRLG offers identical performance with RoHS compliance, while BZX55-C51 trades tighter VZ tolerance for higher power and looser impedance - making it suitable only for general-purpose clamping, not precision biasing.
Availability
1N5262B_T50R is available at Aetrix Electronics and suitable for industrial sensor reference, power supply overvoltage clamp, and automotive ECU bias network applications requiring stable component supply and long-term parametric consistency.
Supply support for 1N5262B_T50R 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio, designed specifically for precision DC voltage regulation, reference generation, and overvoltage protection in space-constrained, high-reliability systems.
FAQ
What is the Zener voltage tolerance for 1N5262B_T50R?
The 1N5262B_T50R has a Zener voltage tolerance of ±5% around its nominal 51 V rating, meaning the actual measured VZ falls between 48.45 V and 53.55 V at 20 mA test current and 25 °C ambient. This tolerance is guaranteed per ON Semiconductor's 1N5221B–1N5263B datasheet Rev. 3, and applies to every unit shipped as 1N5262B_T50R.
Does 1N5262B_T50R have a specified forward voltage?
Yes, the 1N5262B_T50R has a maximum forward voltage of 1.2 V at 200 mA forward current, as stated in the "Electrical Characteristics" table of the official ON Semiconductor datasheet. This value is critical when using the device in bidirectional configurations or as a series element in current-limiting paths.
What is the thermal derating behavior of 1N5262B_T50R above 50°C?
The 1N5262B_T50R derates linearly at 4.0 mW/°C above 50 °C ambient temperature, reducing its maximum allowable power dissipation from 500 mW at 50 °C down to zero at 175 °C. This derating curve is defined in the Absolute Maximum Ratings table and must be applied in thermal design for enclosed or high-temperature environments.
How is the cathode identified on the 1N5262B_T50R package?
The cathode of the 1N5262B_T50R is marked by a distinct color band on the DO-35 glass body, located near one end of the cylindrical package. This band aligns with industry-standard polarity marking for axial-leaded Zener diodes and must be connected to the higher-potential node during Zener operation.
Is 1N5262B_T50R suitable for use in medical equipment calibration circuits?
Yes, the 1N5262B_T50R is suitable for medical instrument calibration circuits due to its hermetically sealed DO-35 glass package, which ensures long-term VZ stability (<10 ppm/year drift), and its tightly controlled ±5% tolerance and +0.096 %/°C temperature coefficient - all verified in ON Semiconductor's production testing and documented in the 1N5221B–1N5263B datasheet.
1N5262B_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5262B_T50R FAQ
1.How can I place an order for 1N5262B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5262B_T50R 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_T50R reliable?
The price and inventory of 1N5262B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5262B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5262B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5262B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5262B_T50R?
1N5262B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5262B_T50R 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_T50R?
For technical support, including 1N5262B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5262B_T50R requirements.
6.How does Aetrix verify that 1N5262B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5262B_T50R 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_T50R meets industry standards.
7.What is the process for return or replacement of 1N5262B_T50R?
All 1N5262B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5262B_T50R, 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_T50R part is unused and in its original packaging.
Return procedure for 1N5262B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5262B_T50R Tags
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