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onsemi 1N5231B_T50R
- Part No.:
- 1N5231B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5231B_T50R.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:5,440
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Product details
Overview
1N5231B_T50R from ON Semiconductor is a 5.1 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation, 17 Ω dynamic impedance at 20 mA test current, and 5.0 μA maximum reverse leakage at 3.8 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, power supply feedback paths, and sensor signal conditioning.
For engineers reviewing the 1N5231B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), temperature coefficient (+0.03 %/°C), cathode-band polarity marking, DO-35 mechanical compatibility, and thermal derating above 50°C (4.0 mW/°C).
Technical Context
This device operates in reverse-bias breakdown mode with a nominal zener voltage of 5.1 V measured at IZ = 20 mA and TL = 30°C ±1°C. Its positive temperature coefficient (+0.03 %/°C) ensures stable regulation across industrial temperature ranges (−65°C to +200°C junction).
The DO-35 hermetically sealed glass package provides reliable performance in high-reliability analog signal chains, with a 0.137 g mass and JEDEC DO-204AH compliance. Forward voltage is specified ≤1.2 V at 200 mA, confirming standard silicon PN junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at IZ = 20 mA - defines precise clamping/reference level in feedback or protection circuits |
| Dynamic Impedance (ZZ) | 17 Ω max at IZ = 20 mA - determines regulation stiffness and output voltage ripple under load variation |
| Reverse Leakage (IR) | 5.0 μA max at VR = 3.8 V - ensures minimal quiescent current in standby or battery-powered designs |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous power handling before thermal derating applies |
| Temperature Coefficient (TC) | +0.03 %/°C - enables predictable voltage drift compensation in temperature-sensitive references |
| Package | DO-35 glass - provides hermetic sealing, axial lead form factor, and JEDEC-compliant footprint for through-hole assembly |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - confirms standard silicon diode conduction for forward-bias use cases |
Pinout & Package
DO-35 glass axial-leaded package with cathode identified by a color band on the body. Leads are tinned copper-clad steel, 0.533 mm diameter, with 25.40 mm minimum length (T50). Total package length is 4.56 mm, body diameter 1.91 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias cathode reference | Connected to lower-potential node in zener regulation; used for forward conduction if required |
| Cathode | Reverse breakdown terminal / Reference output | Marked with color band; connected to higher-potential node to enable controlled breakdown at 5.1 V |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without external trimming in cost-sensitive voltage reference designs |
| +0.03 %/°C temperature coefficient | Minimizes drift-induced error in ambient-temperature-varying applications such as automotive cabin sensors |
| Hermetically sealed DO-35 glass package | Ensures long-term stability and moisture resistance in harsh environments including industrial control enclosures |
| 500 mW power rating with linear derating | Supports robust transient suppression in 5 V rail protection without requiring heatsinking below 50°C ambient |
| Low 5.0 μA reverse leakage at 3.8 V | Reduces standby power loss in always-on monitoring circuits like battery-backed real-time clocks |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in 5 V Power Rails |
|---|---|
Use Scenario: Providing stable 5.1 V bias to instrumentation amplifier input stages in data acquisition systems. IC Role / Device Role / Timing Role: Precision DC reference source replacing higher-cost IC references where ±5% accuracy suffices. Use Value: Eliminates need for external voltage dividers or trimming resistors while maintaining <1% total error over −40°C to +85°C. | Use Scenario: Protecting microcontroller I/O pins from ESD or supply transients on 5 V logic rails. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursions above 5.1 V during surge events. Use Value: Absorbs up to 500 mW transient energy without latch-up, preserving system uptime in industrial PLC modules. |
| Sensor Excitation Supply | Feedback Element in Linear Regulators |
Use Scenario: Biasing resistive temperature detectors (RTDs) or strain gauges in analog front-end modules. IC Role / Device Role / Timing Role: Constant-current source driver via series resistor, leveraging stable VZ for excitation accuracy. Use Value: Delivers <0.1% excitation drift over temperature, improving measurement resolution in HVAC thermostats. | Use Scenario: Setting output voltage in adjustable linear regulators (e.g., LM317-based supplies). IC Role / Device Role / Timing Role: Zener-based feedback divider top element, defining regulated output via resistor ratio. Use Value: Enables compact, low-noise 5.1 V output with <20 mV line/load regulation in point-of-load converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V ±5%, 1.0 W power rating, DO-41 package, 17 Ω ZZ, −0.05 %/°C TC | Higher power handling but larger footprint; negative TC requires different thermal design | Select when >500 mW surge absorption is needed and board space allows DO-41 |
| BZX55C5V1 | 5.1 V ±5%, 500 mW, DO-35, 60 Ω ZZ, +0.06 %/°C TC | Same package but higher impedance and less stable TC; lower cost in high-volume consumer designs | Select for non-critical references where 60 Ω ZZ does not degrade loop stability |
Compared with 1N4733A and BZX55C5V1, the 1N5231B_T50R offers optimal balance of low dynamic impedance (17 Ω), favorable +0.03 %/°C TC, and DO-35 compatibility-making it preferred for precision analog feedback and compact industrial PCB layouts where thermal stability and size are jointly constrained.
Availability
1N5231B_T50R is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and sensor excitation applications requiring stable component supply and consistent DO-35 packaging.
Supply support for 1N5231B_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 power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio designed for general-purpose voltage regulation and protection in cost-sensitive, high-reliability analog circuits.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5231B_T50R?
The 1N5231B_T50R has a zener voltage tolerance of ±5%, specified as 4.845 V (min) to 5.355 V (max) at IZ = 20 mA, with device junction at thermal equilibrium and lead temperature maintained at 30°C ±1°C. This tolerance is guaranteed across the full operating temperature range and reflects manufacturing process control-not statistical distribution.
Does 1N5231B_T50R have a defined forward voltage specification?
Yes, the 1N5231B_T50R specifies a maximum forward voltage of 1.2 V at IF = 200 mA. This value confirms standard silicon PN junction behavior and supports dual-use scenarios such as reverse-bias regulation and forward-bias rectification or LED driving in low-current auxiliary paths.
How does the temperature coefficient of 1N5231B_T50R affect its performance in wide-temperature applications?
The 1N5231B_T50R exhibits a +0.03 %/°C temperature coefficient, meaning its zener voltage increases by approximately 1.53 mV per °C rise across the 5.1 V nominal. Over −40°C to +125°C, this results in a total shift of ~5.0 V to 5.21 V-enabling predictable compensation in analog sensor interfaces without external circuitry.
Can 1N5231B_T50R be used in place of other 5.1 V Zener diodes like 1N4733A?
No-while both are 5.1 V Zeners, the 1N5231B_T50R uses a DO-35 package with 500 mW rating and +0.03 %/°C TC, whereas 1N4733A uses DO-41 with 1.0 W rating and −0.05 %/°C TC. Direct substitution requires verification of thermal margin, PCB footprint, and TC-driven drift requirements in the target application.
What is the maximum reverse leakage current for 1N5231B_T50R and at what voltage is it measured?
The 1N5231B_T50R specifies a maximum reverse leakage current of 5.0 μA, measured at VR = 3.8 V (i.e., 75% of nominal VZ). This low leakage supports ultra-low-power operation in battery-backed systems and ensures minimal loading on high-impedance reference nodes in precision ADC front-ends.
1N5231B_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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
1N5231B_T50R FAQ
1.How can I place an order for 1N5231B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5231B_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 1N5231B_T50R reliable?
The price and inventory of 1N5231B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5231B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5231B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5231B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5231B_T50R?
1N5231B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5231B_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 1N5231B_T50R?
For technical support, including 1N5231B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5231B_T50R requirements.
6.How does Aetrix verify that 1N5231B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5231B_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 1N5231B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5231B_T50R?
All 1N5231B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5231B_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 1N5231B_T50R part is unused and in its original packaging.
Return procedure for 1N5231B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5231B_T50R Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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