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onsemi 1N5253B_T50R
- Part No.:
- 1N5253B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5253B_T50R.pdf
- Description:
- DIODE ZENER 25V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,126
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Product details
Overview
1N5253B_T50R from ON Semiconductor is a 25 V ±5% tolerance, 500 mW glass-encapsulated Zener diode in DO-35 package, with 35 Ω dynamic impedance at 20 mA test current and 0.25 μA maximum reverse leakage at 19 V, used for precision voltage regulation in low-power analog reference circuits.
For engineers reviewing the 1N5253B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode identification, and direct alternatives for voltage reference design, power rail clamping, and overvoltage protection.
Technical Context
The 1N5253B_T50R operates as a two-terminal silicon Zener diode optimized for stable breakdown conduction in reverse bias. Its 25 V nominal Zener voltage is specified at IZ = 20 mA with ±5% tolerance, and its temperature coefficient of +0.088 %/°C indicates positive drift above 25 °C.
It features a hermetically sealed DO-35 glass package with axial leads, cathode identified by a color band, and absolute maximum ratings including 500 mW power dissipation at 25 °C, derating linearly at 4.0 mW/°C above 50 °C, and junction temperature range from –65 °C to +200 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.75 V min / 25 V typ / 26.25 V max at IZ = 20 mA - defines regulated output voltage window under standard test conditions |
| Zener Impedance (ZZ) | 35 Ω max at IZ = 20 mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | 0.25 μA max at VR = 19 V - ensures minimal quiescent current in standby regulation |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous DC power handling before thermal derating applies |
| Temp. Coefficient (TC) | +0.088 %/°C - quantifies voltage drift per degree Celsius rise above 25 °C |
| Package | DO-35 glass axial - provides hermetic sealing, visual cathode band, and industry-standard footprint for through-hole mounting |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band near one lead end; no polarity-sensitive terminals beyond anode/cathode distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation; carries forward current up to 200 mA (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node during regulation; sinks Zener current to maintain stable VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive reference designs |
| Hermetically sealed DO-35 glass case | Provides long-term parameter stability and moisture resistance for industrial ambient operation |
| Low reverse leakage (≤0.25 μA @ 19 V) | Minimizes error contribution in high-impedance voltage divider or sensor bias networks |
| Positive temperature coefficient (+0.088 %/°C) | Allows predictable compensation when paired with negative-TC components in reference circuits |
Applications
| Industrial Sensor Reference | Microcontroller Power Rail Clamp |
|---|---|
Use Scenario: Providing stable 25 V reference for analog-to-digital converter (ADC) input scaling in temperature transmitters. IC Role / Device Role / Timing Role: Voltage reference element establishing precise full-scale input threshold. Use Value: Tight 5% VZ tolerance and low leakage ensure <1 LSB error contribution across 0–70 °C operating range. | Use Scenario: Clamping 3.3 V or 5 V logic supply against transient overvoltage events on embedded control boards. IC Role / Device Role / Timing Role: Overvoltage protection device shunting excess energy to ground during ESD or inductive kickback. Use Value: 25 V breakdown threshold prevents damage to downstream logic while allowing normal operation below clamp level. |
| Linear Regulator Error Amplifier Bias | LED Constant-Current Setpoint |
Use Scenario: Supplying fixed bias voltage to error amplifier input in discrete 12 V linear regulator designs. IC Role / Device Role / Timing Role: Precision voltage source setting feedback reference point for output regulation loop. Use Value: Stable 25 V Zener with +0.088 %/°C TC enables predictable loop gain adjustment across thermal gradients. | Use Scenario: Setting reference voltage for op-amp-based constant-current driver controlling high-brightness white LEDs. IC Role / Device Role / Timing Role: Voltage reference defining current-sense threshold in feedback path. Use Value: Low 35 Ω ZZ ensures minimal current-setpoint drift under varying LED forward voltage drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V nominal, ±5%, 1 W power rating, DO-41 package | Higher power handling but larger footprint; requires PCB layout change | Select when >500 mW dissipation or board space permits DO-41 |
| BZX55C24 | 24 V nominal, ±5%, 500 mW, DO-35 package, 30 Ω ZZ | Same package and power, tighter ZZ, but 1 V lower VZ | Select when 24 V regulation suffices and lower impedance is prioritized |
Compared with 1N4749A and BZX55C24, the 1N5253B_T50R offers exact 25 V regulation in compact DO-35 form with verified thermal derating and leakage performance-ideal where voltage accuracy, size, and legacy compatibility are jointly critical.
Availability
1N5253B_T50R is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller I/O protection, and analog reference design requiring stable component supply and consistent DO-35 mechanical fit.
Supply support for 1N5253B_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 edge applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio designed for general-purpose voltage regulation, reference, and clamping in cost-sensitive, low-power analog circuits.
FAQ
What is the nominal Zener voltage of the 1N5253B_T50R?
The 1N5253B_T50R has a nominal Zener voltage of 25 V, with a guaranteed range of 23.75 V to 26.25 V at test current IZ = 20 mA and TA = 25 °C. This value is defined in the ON Semiconductor 1N5221B–1N5263B datasheet Rev. 3 and confirmed by electrical characterization tables.
What package type does the 1N5253B_T50R use?
The 1N5253B_T50R uses the DO-35 glass axial package, as documented in the ON Semiconductor datasheet. It features hermetic glass sealing, a visible cathode color band, and JEDEC DO-204AH compliance, with dimensions matching standard DO-35 footprints for through-hole assembly.
What is the maximum power dissipation for the 1N5253B_T50R?
The 1N5253B_T50R has a maximum power dissipation of 500 mW at ambient temperature TA = 25 °C. Above 50 °C, it must be derated linearly at 4.0 mW/°C, per the Absolute Maximum Ratings table in the official ON Semiconductor datasheet.
Does the 1N5253B_T50R have a specified temperature coefficient?
Yes, the 1N5253B_T50R has a temperature coefficient of +0.088 %/°C, indicating that its Zener voltage increases by approximately 22 mV per °C rise above 25 °C. This value is explicitly listed in the Electrical Characteristics table for the 1N5253B variant.
How is cathode polarity identified on the 1N5253B_T50R?
The cathode of the 1N5253B_T50R is identified by a single color band located near one lead end of the DO-35 glass body, as shown in the package diagram and top-marking section of the ON Semiconductor datasheet. This band must be oriented toward the higher-potential node during circuit implementation.
1N5253B_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):
- 25 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 19 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
1N5253B_T50R FAQ
1.How can I place an order for 1N5253B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5253B_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 1N5253B_T50R reliable?
The price and inventory of 1N5253B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5253B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5253B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5253B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5253B_T50R?
1N5253B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5253B_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 1N5253B_T50R?
For technical support, including 1N5253B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5253B_T50R requirements.
6.How does Aetrix verify that 1N5253B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5253B_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 1N5253B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5253B_T50R?
All 1N5253B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5253B_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 1N5253B_T50R part is unused and in its original packaging.
Return procedure for 1N5253B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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