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onsemi 1N5224B_T50R
- Part No.:
- 1N5224B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5224B_T50R.pdf
- Description:
- DIODE ZENER 2.8V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
1N5224B_T50R from ON Semiconductor is a 2.8 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 30 Ω dynamic impedance at 20 mA test current and -0.080 %/°C temperature coefficient. It provides precision voltage reference in low-power analog circuits such as sensor biasing and voltage regulation in portable instrumentation.
For engineers reviewing the 1N5224B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal coefficient, dynamic impedance at nominal test current, maximum power rating, and DO-35 package compatibility with through-hole PCB layouts.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-breakdown voltage regulation under controlled current conditions. Its junction is hermetically sealed in a DO-35 glass package with cathode band marking, supporting operation from -65°C to +200°C junction temperature.
It exhibits a nominal zener voltage of 2.8 V at 20 mA (IZ), with 5% tolerance, 30 Ω dynamic impedance (ZZ), and a negative temperature coefficient of -0.080 %/°C - indicating decreasing VZ with rising temperature, typical for low-voltage Zeners below ~5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.8 V ±5% at IZ = 20 mA - defines precise clamping/reference level for low-voltage analog circuits |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Dynamic Impedance (ZZ) | 30 Ω at IZ = 20 mA - determines output voltage stability under small-signal load variations |
| Temperature Coefficient (TC) | -0.080 %/°C - quantifies VZ drift per degree Celsius, critical for temperature-sensitive references |
| Reverse Leakage (IR) | 75 μA max at VR = 1.0 V - specifies off-state current that affects quiescent power in high-impedance bias networks |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - defines conduction threshold when used in forward-biased protection or logic-level detection |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; leads are tinned copper alloy, compatible with standard through-hole reflow or hand-soldering (lead temp ≤ +230°C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential node; establishes reference polarity for reverse-bias operation |
| Cathode | Zener breakdown terminal / voltage clamp output | Connected to regulated node; delivers stable 2.8 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Ensures long-term parameter stability and moisture resistance in industrial environments |
| ±5% VZ tolerance | Enables use without post-manufacturing trimming in cost-sensitive consumer and automotive body electronics |
| -65°C to +200°C operating range | Supports deployment in under-hood automotive modules and high-reliability industrial controls |
| DO-35 mechanical standardization | Guarantees compatibility with legacy pick-and-place feeders and wave-solder tooling |
Applications
| Portable Sensor Biasing | Low-Voltage Power Supply Clamp |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge-based pressure sensors in battery-powered handheld meters. IC Role / Device Role / Timing Role: Precision voltage reference source establishing known bias point for analog front-end amplification. Use Value: 2.8 V output with -0.080 %/°C TC minimizes measurement drift across 0–50°C ambient range in field-deployed instruments. | Use Scenario: Clamping 3.3 V rail against transient overvoltage in microcontroller-based IoT edge nodes powered by switching regulators. IC Role / Device Role / Timing Role: Overvoltage protection element shunting excess energy to ground during ESD or load-dump events. Use Value: 500 mW PD rating and 30 Ω ZZ allow fast response to 100 ns transients while limiting clamped voltage to ≤3.1 V. |
| Industrial Analog Signal Conditioning | Automotive Body Control Module Reference |
Use Scenario: Generating fixed reference for 12-bit ADCs in programmable logic controller (PLC) input modules interfacing 4–20 mA current loops. IC Role / Device Role / Timing Role: Stable DC reference for ratiometric conversion, reducing dependency on supply rail accuracy. Use Value: DO-35 package enables conformal coating compatibility and long-term reliability in dusty, humid factory environments. | Use Scenario: Supplying regulated bias to Hall-effect position sensors in door latch assemblies and seat motor feedback circuits. IC Role / Device Role / Timing Role: Low-drift voltage reference ensuring consistent sensor output across vehicle lifetime and temperature cycling. Use Value: -65°C to +200°C TJ range supports operation in engine bay proximity and meets AEC-Q200 stress testing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal VZ, 1 W PD, DO-41 package, +0.055 %/°C TC | Higher power and voltage; less suitable for ultra-low-power 2.8 V systems | Select when higher power margin or positive TC behavior is required |
| BZX55C2V7 | 2.7 V nominal VZ, ±5% tolerance, DO-35, 500 mW, -0.075 %/°C TC | 0.1 V lower VZ; tighter ZZK spec but identical package and thermal performance | Choose for marginally lower reference voltage where 0.1 V shift is acceptable |
Compared with 1N5224B_T50R, 1N4728A offers higher power and different TC polarity but requires layout change due to DO-41 size; BZX55C2V7 matches DO-35 form factor and thermal behavior but shifts reference by 0.1 V, affecting ADC full-scale calibration.
Availability
1N5224B_T50R is available at Aetrix Electronics and suitable for portable sensor biasing, low-voltage power supply clamping, and industrial analog signal conditioning requiring stable component supply across extended production lifecycles.
Supply support for 1N5224B_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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N52xxB series belongs to ON Semiconductor's general-purpose Zener diode product line, designed for precision voltage regulation and reference in cost-sensitive, high-volume applications where DO-35 compatibility and tight tolerance are essential.
FAQ
What is the nominal zener voltage and tolerance of the 1N5224B_T50R?
The 1N5224B_T50R has a nominal zener voltage of 2.8 V with a tolerance of ±5%, measured at 20 mA test current and 25°C ambient temperature. This specification ensures predictable clamping behavior in low-voltage reference designs and is verified per ON Semiconductor's 1N5221B–1N5263B datasheet Rev. 3.
What package type does the 1N5224B_T50R use and what are its key mechanical features?
The 1N5224B_T50R uses the DO-35 glass axial package with a cathode band marking, compliant with JEDEC DO-204AH. Key features include hermetic glass sealing, 0.137 g mass, 4.56 mm body length, and tinned copper alloy leads rated for +230°C for 10 seconds during soldering - all confirmed in the official ON Semiconductor package drawing DO35AREV03.
How does the temperature coefficient of the 1N5224B_T50R affect its performance in varying ambient conditions?
With a temperature coefficient of -0.080 %/°C, the 1N5224B_T50R exhibits a decrease in zener voltage as temperature rises - approximately -2.24 mV/°C around 2.8 V. This behavior must be accounted for in precision reference designs operating across wide temperature ranges, especially in automotive or industrial settings where ambient can span -40°C to +125°C.
What is the maximum power dissipation rating for the 1N5224B_T50R and how does it derate with temperature?
The 1N5224B_T50R is rated for 500 mW power dissipation at 25°C ambient, with linear derating of 4.0 mW/°C above 50°C. At 100°C ambient, its usable power drops to 300 mW. This derating curve is defined in the Absolute Maximum Ratings table of the ON Semiconductor 1N5221B–1N5263B datasheet and must be applied in thermal design calculations.
Can the 1N5224B_T50R be used in forward-bias applications, and what is its forward voltage specification?
Yes, the 1N5224B_T50R can operate in forward bias with a maximum forward voltage of 1.2 V at 200 mA forward current. This characteristic supports dual-use cases such as polarity protection or logic-level detection, though its primary design intent remains reverse-bias zener regulation as documented in the Electrical Characteristics section of the datasheet.
1N5224B_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):
- 2.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 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
1N5224B_T50R FAQ
1.How can I place an order for 1N5224B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5224B_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 1N5224B_T50R reliable?
The price and inventory of 1N5224B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5224B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5224B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5224B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5224B_T50R?
1N5224B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5224B_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 1N5224B_T50R?
For technical support, including 1N5224B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5224B_T50R requirements.
6.How does Aetrix verify that 1N5224B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5224B_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 1N5224B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5224B_T50R?
All 1N5224B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5224B_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 1N5224B_T50R part is unused and in its original packaging.
Return procedure for 1N5224B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5224B_T50R Tags
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