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onsemi 1N5263B_T50A
- Part No.:
- 1N5263B_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5263B_T50A.pdf
- Description:
- DIODE ZENER 56V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
1N5263B_T50A from ON Semiconductor is a 56 V, ±5% tolerance, 500 mW glass-passivated 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 2.2 Ω dynamic impedance at 10 mA test current and operates across –65 °C to +200 °C junction temperature range.
For engineers reviewing the 1N5263B_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy (56 V ±5%), low dynamic impedance (150 Ω max at IZK = 1 mA), thermal coefficient (+0.096 %/°C), and DO-35 hermetic glass package suitability for high-reliability industrial and automotive environments.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its Zener voltage is specified at 56 V nominal with 5% tolerance, measured under thermal equilibrium at lead temperature of 30 °C ±1 °C with 3/8″ lead length. The 1N5263B_T50A exhibits a positive temperature coefficient of +0.096 %/°C, indicating increasing VZ with rising temperature - critical for stability analysis in temperature-varying designs.
It supports 500 mW steady-state power dissipation at 25 °C, derating linearly by 4.0 mW/°C above 50 °C. Reverse leakage current is limited to 0.1 μA maximum at VR = 43 V, ensuring minimal quiescent current draw in high-impedance bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% - defines stable regulation point for feedback or reference circuits |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous power handling before thermal derating |
| Dynamic Impedance (ZZ) | 150 Ω max @ IZK = 1 mA - determines output voltage variation under small-signal load changes |
| Reverse Leakage (IR) | 0.1 μA max @ VR = 43 V - ensures negligible current draw in high-Z sensing or bias paths |
| Temperature Coefficient (TC) | +0.096 %/°C - quantifies VZ drift per degree Celsius for thermal stability modeling |
| Junction Temp Range | –65 °C to +200 °C - enables operation in extreme industrial, under-hood, or aerospace environments |
| Package | DO-35 glass - hermetically sealed, axial-leaded, RoHS-compliant, JEDEC-standard outline |
Pinout & Package
DO-35 glass package: axial-leaded, hermetically sealed, cathode indicated by color band. Overall length 4.56 mm, body diameter 1.91 mm, lead diameter 0.46 mm, weight 0.137 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in Zener configuration | Connected to lower potential node; carries full reverse current during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Marked with color band; provides stable 56 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without post-manufacturing trimming in cost-sensitive designs |
| Hermetic DO-35 glass package | Provides long-term reliability and moisture resistance in harsh ambient conditions |
| Low IR (0.1 μA @ 43 V) | Minimizes error in high-impedance voltage divider or reference buffer circuits |
| Positive TC (+0.096 %/°C) | Allows predictable compensation when paired with negative-TC components (e.g., transistors) |
| JEDEC DO-204AH compliance | Ensures mechanical interchangeability and automated assembly compatibility |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise feedback threshold for TL431 or similar shunt regulator ICs. Use Value: 56 V rating allows direct use in 48 V system auxiliary rails; ±5% tolerance avoids need for external calibration. | Use Scenario: Protecting microcontroller I/O pins or sensor inputs from transient overvoltage events exceeding 43 V. IC Role / Device Role / Timing Role: Passive clamping device shunting excess energy to ground when input exceeds 56 V breakdown. Use Value: Low 0.1 μA leakage preserves signal integrity in high-Z sensor interfaces; DO-35 form factor fits compact PCB layouts. |
| Voltage Reference | Current Source Bias |
Use Scenario: Providing stable reference for analog-to-digital converter (ADC) reference buffers or precision op-amp bias networks. IC Role / Device Role / Timing Role: Two-terminal passive reference source delivering fixed 56 V potential for scaling or offsetting analog signals. Use Value: +0.096 %/°C TC enables predictable drift modeling; hermetic DO-35 ensures long-term VZ stability in uncontrolled environments. | Use Scenario: Establishing constant current through LEDs or phototransistors using a simple Zener-resistor circuit. IC Role / Device Role / Timing Role: Voltage-setting element defining current magnitude via series resistor (I ≈ (VCC − 56 V)/R). Use Value: 500 mW rating supports up to ~9 mA continuous current at 56 V; DO-35 leads accommodate manual prototyping and rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4764A | 56 V ±5%, 1 W power rating, DO-41 package, 150 Ω ZZ @ IZ = 10 mA | Higher power handling but larger footprint; less suitable for space-constrained PCBs | Select when >500 mW dissipation or higher surge robustness is required |
| BZX55-C56 | 56 V ±5%, 500 mW, DO-35, 150 Ω ZZ @ IZ = 5 mA, 0.1 μA IR @ 45.6 V | Nearly identical electrical specs; different marking convention and minor TC variation (+0.09 %/°C) | Drop-in alternative where ON Semiconductor sourcing is constrained |
Compared with 1N5263B_T50A, 1N4764A offers higher power margin but requires layout change due to DO-41 size, while BZX55-C56 matches DO-35 form and function closely - making it the preferred alternative for footprint-consistent redesigns requiring same thermal and electrical behavior.
Availability
1N5263B_T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical instrumentation requiring stable component supply and long-lifecycle support.
Supply support for 1N5263B_T50A 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N52xxB series was developed for general-purpose precision voltage regulation in cost-sensitive, high-reliability applications - emphasizing tight tolerance, hermetic packaging, and wide temperature operation.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5263B_T50A?
The 1N5263B_T50A has a nominal Zener voltage of 56 V with a tolerance of ±5%, measured under thermal equilibrium at 30 °C ±1 °C lead temperature. This specification ensures predictable regulation performance in feedback and reference circuits without requiring post-production adjustment. The 1N5263B_T50A maintains this tolerance across its rated operating temperature range.
What package type does the 1N5263B_T50A use, and what are its key mechanical features?
The 1N5263B_T50A uses the DO-35 glass package: a hermetically sealed, axial-leaded, JEDEC DO-204AH-compliant outline. Key features include a cathode color band, 4.56 mm overall length, 1.91 mm body diameter, 0.46 mm lead diameter, and 0.137 g weight. The 1N5263B_T50A's glass construction provides superior moisture resistance and long-term parameter stability versus plastic-packaged alternatives.
How does the temperature coefficient of the 1N5263B_T50A affect its voltage regulation performance?
The 1N5263B_T50A has a positive temperature coefficient of +0.096 %/°C, meaning its Zener voltage increases predictably with rising junction temperature. This allows designers to model and compensate for thermal drift in precision references - for example, by pairing the 1N5263B_T50A with negative-TC components. The 1N5263B_T50A's TC is confirmed in the ON Semiconductor datasheet Rev. 3 (December 2018) under Electrical Characteristics.
What is the maximum reverse leakage current for the 1N5263B_T50A, and at what voltage is it specified?
The maximum reverse leakage current for the 1N5263B_T50A is 0.1 μA, specified at VR = 43 V - 77% of its nominal Zener voltage. This ultra-low leakage ensures minimal loading in high-impedance applications such as sensor bias networks or ADC reference dividers. The 1N5263B_T50A maintains this spec across its full operating temperature range, supporting stable performance in precision analog systems.
Can the 1N5263B_T50A be used in place of the 1N4764A, and what are the main differences?
No - the 1N5263B_T50A is not a direct replacement for the 1N4764A due to differing power ratings (500 mW vs. 1 W) and packages (DO-35 vs. DO-41). While both offer 56 V ±5% Zener voltage, the 1N5263B_T50A's lower power rating and smaller footprint make it unsuitable for applications requiring higher surge capability or thermal mass. The 1N5263B_T50A is optimized for space-constrained, low-power regulation; the 1N4764A serves higher-power roles.
1N5263B_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 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
1N5263B_T50A FAQ
1.How can I place an order for 1N5263B_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5263B_T50A 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 1N5263B_T50A reliable?
The price and inventory of 1N5263B_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5263B_T50A is usually 5 days.
3.What payment methods are accepted for 1N5263B_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5263B_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5263B_T50A?
1N5263B_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5263B_T50A 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 1N5263B_T50A?
For technical support, including 1N5263B_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5263B_T50A requirements.
6.How does Aetrix verify that 1N5263B_T50A is sourced from the original manufacturer or authorized distributors?
All 1N5263B_T50A 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 1N5263B_T50A meets industry standards.
7.What is the process for return or replacement of 1N5263B_T50A?
All 1N5263B_T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5263B_T50A, 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 1N5263B_T50A part is unused and in its original packaging.
Return procedure for 1N5263B_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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