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onsemi 1N5253BTR
- Part No.:
- 1N5253BTR
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5253BTR.pdf
- Description:
- DIODE ZENER 25V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:155,000
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Product details
Overview
1N5253BTR from Fairchild Semiconductor is a 25 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation, with 35 Ω dynamic impedance at 10 mA test current and 0.25 μA reverse leakage at 19 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5253BTR datasheet, pinout, applications, or equivalent options, this device serves as a stable, temperature-compensated shunt regulator in power supply feedback loops, sensor biasing networks, and voltage clamp stages where tight tolerance and low leakage are required.
Technical Context
The 1N5253BTR operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 25 V, characterized by a typical temperature coefficient of +0.088 %/°C - indicating positive drift with rising junction temperature. Its 35 Ω Zener impedance (ZZ) at IZ = 10 mA ensures minimal output voltage variation under load changes.
Designed for operation within -65°C to +200°C junction temperature range and rated for 500 mW at 25°C (derating linearly above 50°C), the device uses hermetically sealed DO-35 glass packaging with cathode band marking and 0.137 g mass per JEDEC DO-204AH standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25 V nominal, 23.75–26.25 V min/max at IZ = 10 mA - defines precise clamping threshold for reference or protection |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous thermal load without derating |
| Zener Impedance (ZZ) | 35 Ω at IZ = 10 mA - determines output voltage stability under varying current draw |
| Reverse Leakage (IR) | 0.25 μA max at VR = 19 V - ensures minimal quiescent current in standby regulation |
| Temperature Coefficient | +0.088 %/°C - quantifies VZ drift magnitude per degree rise in junction temperature |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - specifies conduction drop when used in forward-biased paths |
| Package | DO-35 glass case - provides hermetic sealing, axial leads, and JEDEC-compliant mechanical footprint |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Completes conduction path during forward operation; ties to ground or common return in shunt regulator topology |
| Cathode | Current exit terminal in forward bias; higher-potential connection in Zener regulation | Connected to regulated voltage node; reverse-biased to maintain fixed VZ across load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable clamping without post-production trimming in cost-sensitive consumer and industrial supplies |
| Low 0.25 μA leakage at 19 V | Minimizes error current in high-impedance reference dividers and battery-backed circuits |
| +0.088 %/°C tempco | Supports stable regulation across wide ambient ranges without external compensation components |
| 500 mW power rating | Allows direct use in 5–12 V supply rails with series resistor sizing for ≤20 mA Zener current |
| DO-35 glass hermetic seal | Ensures long-term reliability in humid or chemically aggressive environments versus plastic-packaged alternatives |
Applications
| Industrial Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 25 V bias to precision RTD or strain gauge bridge amplifiers in factory automation modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing excitation potential independent of input rail fluctuations. Use Value: Maintains measurement accuracy within ±0.1% full scale by limiting bias drift to <±0.2 V over -40°C to +85°C ambient. |
Use Scenario: Protecting USB 2.0 data line ESD protection diodes from transient overvoltage exceeding 20 V during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting crowbar element that clamps surge energy before it reaches downstream TVS or transceiver ICs. Use Value: Limits peak clamped voltage to 26.25 V (max VZ) while absorbing up to 500 mW for 8.3 ms pulses per JEDEC spec. |
| Programmable Power Supply Feedback | Legacy Microcontroller Reset Circuit |
Use Scenario: Setting adjustable output voltage in lab-grade bench supplies using TL431-based feedback with coarse Zener pre-regulation. IC Role / Device Role / Timing Role: Pre-regulator stage stabilizing reference input to error amplifier, reducing ripple sensitivity. Use Value: Reduces TL431 reference noise contribution by >15 dB through 35 Ω ZZ, improving output voltage settling time by 22%. |
Use Scenario: Generating clean 25 V reset threshold for vintage 8-bit microcontrollers requiring non-standard brown-out detection. IC Role / Device Role / Timing Role: Threshold comparator element in RC-based reset generator with hysteresis via resistor divider. Use Value: Enables reliable reset assertion at 25.0 V ±1.25 V across temperature, eliminating false triggers from 12 V rail ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V nominal, ±5%, 1 W rating, DO-41 package, 20 Ω ZZ at 10.5 mA | Higher power handling but larger footprint; requires PCB layout change | Select when ≥1 W dissipation or lower impedance is needed; not drop-in due to package and voltage mismatch |
| BZX55C24 | 24 V nominal, ±5%, 500 mW, DO-35, 30 Ω ZZ at 5 mA, -0.07 %/°C tempco | Slightly lower VZ, tighter tempco, same package - compatible for 24 V systems | Use where 24 V regulation suffices and negative tempco improves stability near room temperature |
Compared with 1N5253BTR, 1N4749A offers higher power and lower impedance but demands DO-41 layout revision, while BZX55C24 provides matched DO-35 form factor and improved tempco at 24 V - making it suitable only where 1 V lower clamping is acceptable.
Availability
1N5253BTR is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port overvoltage clamp, and programmable power supply feedback requiring stable component supply with traceable lot control and consistent parametric performance.
Supply support for 1N5253BTR 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 belongs to Fairchild's legacy Zener diode product line engineered for general-purpose voltage regulation and protection in commercial-grade power and analog circuits.
FAQ
What is the Zener voltage tolerance of the 1N5253BTR?
The 1N5253BTR has a Zener voltage tolerance of ±5% around its nominal 25 V rating, meaning the actual measured VZ falls between 23.75 V and 26.25 V when tested at IZ = 10 mA and TA = 25°C. This tolerance is guaranteed per Fairchild's Rev. 4.10 datasheet and applies to all units shipped as 1N5253BTR.
Can the 1N5253BTR be used in surface-mount designs?
No, the 1N5253BTR is packaged exclusively in the axial-leaded DO-35 glass case and is not a surface-mount device. It requires through-hole mounting with 0.46 mm diameter leads and 4.56 mm body length. For SMT equivalents, consider the MMBZ5253B or similar SOD-123 packages - but those are not functionally identical replacements for 1N5253BTR.
What is the maximum reverse leakage current for the 1N5253BTR?
The maximum reverse leakage current (IR) for the 1N5253BTR is 0.25 μA when measured at VR = 19 V and TA = 25°C. This value is specified in the "Electrical Characteristics" table of the Fairchild 1N5221B–1N5263B datasheet Rev. 4.10 and reflects worst-case leakage under sub-breakdown conditions.
Does the 1N5253BTR have a specified forward voltage?
Yes, the 1N5253BTR has a maximum forward voltage (VF) of 1.2 V at IF = 200 mA, as stated in the "Absolute Maximum Ratings" section of the Fairchild datasheet. This parameter defines conduction behavior when the diode is forward-biased - relevant for polarity protection or OR-ing configurations involving the 1N5253BTR.
Is the 1N5253BTR suitable for automotive applications?
No, the 1N5253BTR is not qualified for automotive use. Per Fairchild's Authorized Use policy in the datasheet, this device is a commercial-grade part and explicitly excluded from automotive, aerospace, or safety-critical applications unless approved in writing by a Fairchild officer. Its qualification level does not meet AEC-Q101 or similar automotive reliability standards.
1N5253BTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5253BTR FAQ
1.How can I place an order for 1N5253BTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5253BTR 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 1N5253BTR reliable?
The price and inventory of 1N5253BTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5253BTR is usually 5 days.
3.What payment methods are accepted for 1N5253BTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5253BTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5253BTR?
1N5253BTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5253BTR 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 1N5253BTR?
For technical support, including 1N5253BTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5253BTR requirements.
6.How does Aetrix verify that 1N5253BTR is sourced from the original manufacturer or authorized distributors?
All 1N5253BTR 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 1N5253BTR meets industry standards.
7.What is the process for return or replacement of 1N5253BTR?
All 1N5253BTR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5253BTR, 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 1N5253BTR part is unused and in its original packaging.
Return procedure for 1N5253BTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5253BTR Tags
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