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onsemi 1N5228B_T50R
- Part No.:
- 1N5228B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5228B_T50R.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,326
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Product details
Overview
1N5228B_T50R from ON Semiconductor is a 3.9 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation and 20 mA test current, with 23 Ω dynamic impedance and -0.06 %/°C temperature coefficient-used for precision voltage reference and low-power regulation in analog sensor signal conditioning circuits.
For engineers reviewing the 1N5228B_T50R datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode identification, and direct-fit alternatives for legacy through-hole Zener reference design.
Technical Context
The 1N5228B_T50R operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 3.9 V, designed for stable DC voltage clamping and reference generation in low-current (<20 mA) linear circuits. Its DO-35 hermetically sealed glass package ensures long-term stability and low leakage under ambient conditions.
It exhibits a negative temperature coefficient (-0.06 %/°C), meaning its Zener voltage decreases slightly with rising junction temperature-critical for biasing accuracy in temperature-sensitive analog front-ends. The device supports pulsed operation up to 8.3 ms at 50°C ambient, with 1.2 V forward voltage max at 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.705 V min to 4.095 V max @ IZ = 20 mA - defines usable reference range for ±5% tolerance designs |
| Dynamic Impedance (ZZ) | 23 Ω @ IZ = 20 mA - determines output voltage variation under load current changes |
| Power Dissipation (PD) | 500 mW @ TA = 25°C - sets maximum continuous DC power before thermal derating begins |
| Temperature Coefficient | -0.06 %/°C - quantifies VZ drift per degree Celsius rise in junction temperature |
| Reverse Leakage (IR) | 10 μA max @ VR = 1.0 V - limits error current in high-impedance reference nodes |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - constrains conduction loss when used bidirectionally or in series protection |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; no polarity-sensitive terminals beyond anode/cathode-no active control pins or multi-terminal functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-bias reference configuration |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential side to enable regulated voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable reference accuracy without post-calibration in cost-sensitive consumer electronics |
| Hermetically sealed DO-35 glass case | Provides long-term parameter stability and moisture resistance for industrial control modules |
| Low 23 Ω dynamic impedance | Maintains <10 mV output variation across ±2 mA load shifts in feedback networks |
| Negative temperature coefficient | Compensates for positive TC components (e.g., op-amp input offset) in mixed-signal IC references |
Applications
| ADC Reference Voltage | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.9 V reference to 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Precision voltage reference source for analog-to-digital conversion accuracy. Use Value: Maintains ±0.5 LSB integral nonlinearity error over -40°C to +85°C due to tight VZ tolerance and low ZZ. | Use Scenario: Protecting microcontroller GPIO pins from transient surges in automotive body control modules. IC Role / Device Role / Timing Role: Reverse-biased shunt clamp limiting input voltage to safe levels. Use Value: Activates within 10 ns at 4.2 V, diverting >100 mA surge current while holding node below 4.5 V. |
| Linear Regulator Feedback | Current Source Bias |
Use Scenario: Setting output voltage of adjustable LDOs like LM317 in programmable lab power supplies. IC Role / Device Role / Timing Role: Fixed-voltage reference in resistor-divider feedback network. Use Value: Enables 3.9 V ±0.2 V output setting with <0.1% line regulation error across 5–15 V input range. | Use Scenario: Establishing constant base current for PNP transistor current sources in LED driver bias networks. IC Role / Device Role / Timing Role: Stable voltage reference defining emitter-base voltage drop. Use Value: Delivers 1.0% current stability over 10–50°C ambient via matched TC compensation with transistor VBE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A | 3.9 V nominal, 1 W rating, DO-41 package, 9 Ω ZZ, +0.07 %/°C TC | Higher power handling but larger footprint and opposite TC sign | Select when board space allows DO-41 and thermal margin exceeds 500 mW |
| BZX55-C3V9 | 3.9 V nominal, ±5%, DO-35, 500 mW, 25 Ω ZZ, -0.06 %/°C TC | Same package and TC, but tighter IR spec (5 μA @ 1 V) | Prefer for ultra-low-leakage analog sensor interfaces where sub-10 μA error current is critical |
Compared with 1N4730A and BZX55-C3V9, the 1N5228B_T50R offers identical DO-35 form factor and matching TC for thermal compensation schemes, while delivering optimal balance of impedance, leakage, and legacy compatibility for repair and second-source procurement.
Availability
1N5228B_T50R is available at Aetrix Electronics and suitable for analog sensor interfaces, embedded voltage monitoring, and legacy repair requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N5228B_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, and cloud infrastructure markets.
The 1N52xxB series was developed as a standardized family of general-purpose Zener diodes for cost-effective voltage regulation and reference in legacy and new-design through-hole applications.
FAQ
What is the exact Zener voltage range for 1N5228B_T50R at 20 mA test current?
The 1N5228B_T50R has a guaranteed Zener voltage range of 3.705 V (minimum) to 4.095 V (maximum) when measured at IZ = 20 mA and TA = 25°C, reflecting its ±5% tolerance specification. This range is validated per ON Semiconductor's Rev. 3 datasheet and applies directly to the 1N5228B_T50R part number under standard test conditions.
Does 1N5228B_T50R have a specified forward voltage rating?
Yes, the 1N5228B_T50R specifies a maximum forward voltage of 1.2 V at IF = 200 mA, as documented in the Absolute Maximum Ratings table of the ON Semiconductor datasheet. This value is critical when using the 1N5228B_T50R in bidirectional protection or series-conduction configurations.
How does the temperature coefficient of 1N5228B_T50R affect circuit performance?
The 1N5228B_T50R has a temperature coefficient of -0.06 %/°C, meaning its Zener voltage decreases by approximately 2.34 mV per °C rise in junction temperature. This behavior must be accounted for in precision reference designs; however, it enables passive compensation when paired with positive-TC elements like op-amp input offsets in the 1N5228B_T50R-based circuit.
Is the 1N5228B_T50R compatible with lead-free soldering processes?
Yes, the 1N5228B_T50R's DO-35 glass package supports lead-free reflow and wave soldering per JEDEC J-STD-020 guidelines, with a maximum lead temperature of +230°C for 10 seconds at 1/16 inch from case. This makes the 1N5228B_T50R suitable for modern RoHS-compliant assembly lines without derating concerns.
What is the maximum allowable reverse leakage current for 1N5228B_T50R?
The 1N5228B_T50R specifies a maximum reverse leakage current (IR) of 10 μA at VR = 1.0 V and TA = 25°C. This parameter is critical for high-impedance reference nodes, and the 1N5228B_T50R meets this spec consistently across production lots per ON Semiconductor's published Electrical Characteristics table.
1N5228B_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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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
1N5228B_T50R FAQ
1.How can I place an order for 1N5228B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5228B_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 1N5228B_T50R reliable?
The price and inventory of 1N5228B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5228B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5228B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5228B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5228B_T50R?
1N5228B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5228B_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 1N5228B_T50R?
For technical support, including 1N5228B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5228B_T50R requirements.
6.How does Aetrix verify that 1N5228B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5228B_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 1N5228B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5228B_T50R?
All 1N5228B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5228B_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 1N5228B_T50R part is unused and in its original packaging.
Return procedure for 1N5228B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5228B_T50R Tags
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