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onsemi 1N5231B_S00Z
- Part No.:
- 1N5231B_S00Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5231B_S00Z.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,827
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Product details
Overview
1N5231B_S00Z from ON Semiconductor is a 5.1 V, ±5% tolerance, 500 mW DO-35 glass-encapsulated Zener diode optimized for voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers 17 Ω dynamic impedance at 20 mA, -0.03%/°C temperature coefficient, and 5.0 μA reverse leakage at 3.8 V.
For engineers reviewing the 1N5231B_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal stability, low leakage at sub-breakdown bias, and DO-35 package compatibility with through-hole PCB assembly and manual rework workflows.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode with sharp reverse breakdown characteristics. Its 5.1 V nominal Zener voltage is specified at 20 mA test current (IZ), with guaranteed min/max limits of 4.845 V and 5.355 V under 5% tolerance. The junction is hermetically sealed in a DO-35 glass package rated for -65°C to +200°C operating and storage temperature ranges.
Thermal derating begins at 50°C ambient, reducing power dissipation by 4.0 mW/°C above that point. Forward voltage is ≤1.2 V at 200 mA, confirming standard PN-junction behavior in forward conduction-critical for bidirectional clamping or polarity-sensitive protection schemes where forward conduction may occur during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal, 4.845–5.355 V range at IZ = 20 mA - ensures stable reference within ±5% across production lots and temperature. |
| Dynamic Impedance (ZZ) | 17 Ω max at IZ = 20 mA - maintains tight regulation under load variation; lower than 1N5230B (19 Ω) and higher than 1N5232B (11 Ω). |
| Temperature Coefficient (TC) | ±0.03 %/°C - near-zero drift enables precision references in industrial environments without active compensation. |
| Reverse Leakage (IR) | 5.0 μA max at VR = 3.8 V - minimizes quiescent current in battery-powered voltage monitors and high-impedance bias networks. |
| Power Dissipation (PD) | 500 mW at TA = 50°C - supports continuous operation in compact enclosures with moderate airflow or heatsinking. |
| Package | DO-35 glass axial - industry-standard through-hole footprint compatible with legacy PCB tooling and hand-soldering. |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter body, 5.33 mm overall length, cathode indicated by color band. Leads are tinned copper-clad steel, suitable for wave or hand soldering per JEDEC DO-204AH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node; conducts when forward-biased ≥0.7 V (≤1.2 V @ 200 mA). |
| Cathode | Zener breakdown terminal / high-side connection | Marked with color band; connected to regulated voltage node; maintains 5.1 V reference when reverse-biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Guarantees 4.845–5.355 V output at 20 mA, enabling direct replacement in legacy designs requiring ±5% regulation accuracy. |
| -65°C to +200°C operating range | Supports deployment in automotive engine compartments, industrial motor drives, and aerospace subsystems without derating below -40°C or above +125°C. |
| Hermetic glass encapsulation | Prevents moisture ingress and long-term parameter drift, critical for 10+ year field reliability in unsealed outdoor electronics. |
| Low 5.0 μA leakage at 3.8 V | Reduces standby current in always-on voltage supervisors and extends battery life in portable instrumentation. |
Applications
| Voltage Reference for Op-Amp Circuits | Overvoltage Clamp in Microcontroller I/O Protection |
|---|---|
Use Scenario: Providing stable 5.1 V reference to non-inverting input of rail-to-rail op-amp in precision sensor signal conditioning stage. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing DC bias point independent of supply ripple or load current variation. Use Value: Enables <10 ppm/°C offset drift in amplifier gain stage due to ±0.03 %/°C TC and 17 Ω ZZ, eliminating need for trimming potentiometers. | Use Scenario: Clamping 3.3 V GPIO line against ESD transients exceeding 8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor-conducts in reverse breakdown at 5.1 V and forward at ~1.2 V to limit excursion to ±1.2 V. Use Value: Limits peak voltage to safe margin below MCU absolute maximum rating (typically ±0.3 V beyond supply), preventing latch-up without adding series resistance. |
| Feedback Divider in Isolated Flyback Regulator | Low-Power Brown-Out Detection Threshold |
Use Scenario: Setting output voltage via optocoupler feedback network in 5 V/1 A isolated AC-DC adapter. IC Role / Device Role / Timing Role: Precision Zener element in secondary-side error amplifier reference leg, directly sensing regulated output. Use Value: Maintains ±2% output regulation across line/load/temperature due to tight VZ tolerance and low ZZ, reducing need for post-production calibration. | Use Scenario: Triggering reset signal when 3.3 V system rail drops below 2.9 V during power interruption. IC Role / Device Role / Timing Role: Threshold detector using resistor divider and comparator; 1N5231B_S00Z sets hysteresis-free trip point via Zener clamp. Use Value: Achieves <50 ms response time with <1 μA quiescent current draw, extending hold-up time in battery-backed systems. |
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, 1 W, DO-41 package, 17 Ω ZZ, ±5% tolerance, -0.05%/°C TC | Higher power rating supports 2× current handling but requires larger PCB footprint and thermal relief. | Select when >500 mW dissipation or >20 mA Zener current is required; not drop-in due to DO-41 vs. DO-35 lead spacing. |
| BZX55-C5V1 | 5.1 V, 500 mW, DO-35, ±5% tolerance, 600 Ω ZZ at 5 mA, -0.05%/°C TC | Higher dynamic impedance degrades regulation under varying load; specified at lower test current (5 mA). | Acceptable for low-precision biasing where cost is primary driver; avoid in feedback loops requiring <20 mV load regulation. |
Compared with 1N4733A and BZX55-C5V1, the 1N5231B_S00Z offers optimal balance of DO-35 footprint compatibility, 20 mA-rated low-impedance regulation, and superior temperature stability-making it preferred for space-constrained, precision analog designs where thermal drift must be minimized.
Availability
1N5231B_S00Z is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply feedback applications requiring stable component supply, long-term obsolescence management, and traceable sourcing for industrial control, medical instrumentation, and automotive subsystems.
Supply support for 1N5231B_S00Z 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, sensors, and logic ICs for automotive, industrial, cloud computing, and consumer markets.
The 1N52xxB series is part of ON Semiconductor's legacy discrete Zener diode portfolio, designed specifically for general-purpose voltage regulation, reference, and protection in cost-sensitive, high-reliability through-hole applications.
FAQ
What is the Zener voltage tolerance and test condition for the 1N5231B_S00Z?
The 1N5231B_S00Z has a ±5% Zener voltage tolerance, specified as 4.845 V minimum to 5.355 V maximum at a test current of 20 mA and ambient temperature of 25°C. This tolerance is guaranteed across production lots and validated per ON Semiconductor's Rev. 3 datasheet for the 1N5221B–1N5263B family. The 1N5231B_S00Z achieves this performance in its DO-35 glass package with hermetic sealing.
Does the 1N5231B_S00Z have a specified forward voltage, and how is it relevant in circuit design?
Yes, the 1N5231B_S00Z has a maximum forward voltage of 1.2 V at 200 mA forward current. This specification confirms standard silicon PN-junction behavior and is critical when the device is used bidirectionally-for example, as an ESD clamp on microcontroller I/O lines-where forward conduction limits negative excursions to safe levels below the MCU's absolute minimum rating.
How does the temperature coefficient of the 1N5231B_S00Z impact its use as a voltage reference?
The 1N5231B_S00Z has a temperature coefficient of ±0.03 %/°C, meaning its Zener voltage drifts less than ±1.53 mV/°C around 5.1 V. This near-zero drift enables stable reference performance across industrial temperature ranges (-40°C to +125°C) without external compensation, making the 1N5231B_S00Z suitable for precision analog front-ends and sensor biasing where thermal stability is essential.
Can the 1N5231B_S00Z be used in place of the 1N5231B without modification?
Yes-the 1N5231B_S00Z is a direct variant of the 1N5231B, with identical electrical specifications, DO-35 package, and marking configuration (LOGO / 23 / 1B). The "_S00Z" suffix reflects Fairchild/ON Semiconductor internal manufacturing and traceability coding and does not indicate functional or parametric deviation from the base 1N5231B part number.
What is the maximum power dissipation and thermal derating behavior of the 1N5231B_S00Z?
The 1N5231B_S00Z has a maximum power dissipation of 500 mW at ambient temperatures up to 50°C. Above 50°C, it derates linearly at 4.0 mW/°C-so at 75°C ambient, maximum allowable dissipation drops to 400 mW. This derating curve is defined in the Absolute Maximum Ratings table and applies to the DO-35 package's thermal resistance to ambient under still-air conditions.
1N5231B_S00Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5231B_S00Z FAQ
1.How can I place an order for 1N5231B_S00Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5231B_S00Z 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_S00Z reliable?
The price and inventory of 1N5231B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5231B_S00Z is usually 5 days.
3.What payment methods are accepted for 1N5231B_S00Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5231B_S00Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5231B_S00Z?
1N5231B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5231B_S00Z 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_S00Z?
For technical support, including 1N5231B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5231B_S00Z requirements.
6.How does Aetrix verify that 1N5231B_S00Z is sourced from the original manufacturer or authorized distributors?
All 1N5231B_S00Z 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_S00Z meets industry standards.
7.What is the process for return or replacement of 1N5231B_S00Z?
All 1N5231B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5231B_S00Z, 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_S00Z part is unused and in its original packaging.
Return procedure for 1N5231B_S00Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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