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onsemi 1N5239C
- Part No.:
- 1N5239C
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
1N5239C.pdf
- Description:
- RECTIFIER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:19,600
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Product details
Overview
1N5239C from ON Semiconductor is a 500 mW, ±2% tolerance, 9.1 V zener voltage regulator diode in DO-204AH (DO-35) glass package, designed for precision voltage reference and low-power regulation in analog power supplies, sensor biasing, and overvoltage protection circuits.
For engineers reviewing the 1N5239C datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 9.1 V ±2% zener voltage tolerance at 20 mA test current, 10 Ω dynamic impedance, +0.068 %/°C temperature coefficient, and hermetically sealed double-slug glass construction for stable operation from –65°C to +200°C.
Technical Context
The 1N5239C operates as a reverse-biased silicon zener diode with metallurgically bonded double-slug construction, enabling precise DC voltage regulation via controlled avalanche breakdown. Its 9.1 V nominal zener voltage is specified at IZT = 20 mA with thermal equilibrium at 30°C lead temperature.
It exhibits a positive temperature coefficient (+0.068 %/°C), indicating increasing zener voltage with rising junction temperature - a critical factor in high-accuracy reference designs where thermal drift must be modeled using ∆V = θVZ·∆TJ. Maximum power dissipation is 500 mW at TL ≤ 75°C, derating linearly above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V ±2% at IZT = 20 mA - ensures stable reference within ±0.182 V across production units. |
| Power Dissipation | 500 mW at TL ≤ 75°C - supports continuous regulation in compact PCB layouts with minimal heatsinking. |
| Zener Impedance ZZT | 10 Ω at IZT = 20 mA - minimizes output voltage variation under load current changes. |
| Temperature Coefficient | +0.068 %/°C - enables predictable voltage drift compensation in temperature-critical analog circuits. |
| Reverse Leakage IR | 3 µA at VR = 7 V - guarantees low quiescent current in standby or battery-powered bias networks. |
| Forward Voltage VF | 1.1 V max at IF = 200 mA - allows use as a low-drop rectifier or clamp in dual-role designs. |
Pinout & Package
Package: DO-204AH (DO-35) - hermetically sealed double-slug glass case with axial leads, 3.05 mm diameter × 5.08 mm length, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in zener mode | Connected to system ground or lower-potential rail; reverse current flows into cathode during regulation. |
| Cathode | Regulated output node in zener mode | Positive terminal during zener conduction; provides stable 9.1 V relative to anode when reverse biased ≥ VZ. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% zener voltage tolerance | Reduces need for post-production trimming in precision references and feedback networks. |
| Hermetically sealed glass package | Ensures long-term parameter stability and moisture resistance in industrial and automotive environments. |
| Double-slug construction | Improves thermal coupling between die and leads, lowering junction-to-lead thermal resistance (θJL). |
| Metallurgically bonded die attach | Enhances reliability under thermal cycling and mechanical stress versus epoxy-based alternatives. |
| Wide operating temperature range | Supports deployment in under-hood automotive, downhole, and aerospace applications (–65°C to +200°C). |
Applications
| Industrial Sensor Biasing | Low-Power Voltage Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) and strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source establishing known current through sensing element. Use Value: ±2% VZ tolerance and +0.068 %/°C TC enable <1% total error over –40°C to +85°C without calibration. |
Use Scenario: Generating fixed 9.1 V reference for ADC/DAC biasing and op-amp level-shifting in portable medical devices. IC Role / Device Role / Timing Role: Passive voltage reference replacing higher-cost IC references where 1% accuracy suffices. Use Value: 10 Ω ZZT limits output deviation to <0.2 V under 20 mA load transients, maintaining signal integrity. |
| Overvoltage Clamp Protection | Linear Regulator Feedback Divider |
Use Scenario: Clamping transient spikes on 5 V or 12 V rails in motor drive control boards exposed to inductive kickback. IC Role / Device Role / Timing Role: Shunt protection device limiting rail voltage to safe levels during ESD or surge events. Use Value: 500 mW rating and fast avalanche response protect downstream logic without requiring active circuitry. |
Use Scenario: Setting output voltage of adjustable LDOs (e.g., LM317) via feedback divider with improved accuracy vs. standard resistors. IC Role / Device Role / Timing Role: Precision top resistor replacement in feedback network to tighten output regulation. Use Value: Replaces one resistor in divider to achieve ±2% overall output tolerance, reducing BOM count and calibration steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5239B | ±5% tolerance (vs. ±2% for 1N5239C); otherwise identical VZ, IZT, ZZT, and package. | Suitable for non-critical regulation where cost sensitivity outweighs accuracy requirements. | Select 1N5239B only if ±5% output variation is acceptable in final design margin. |
| BZX55C9V1 | Same 9.1 V ±2%, but TO-92 plastic package; higher leakage (5 µA @ 7.3 V) and wider temp range (–65°C to +175°C). | Better suited for high-volume consumer PCBs where automated assembly favors plastic packages. | Choose BZX55C9V1 when DO-35 glass handling or hermetic sealing is not required and lead-free reflow compatibility is needed. |
Compared with 1N5239B and BZX55C9V1, the 1N5239C delivers tighter voltage tolerance than the former and superior hermetic reliability versus the latter - making it optimal for industrial-grade analog references where long-term drift and environmental robustness are prioritized.
Availability
1N5239C is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power voltage reference, and overvoltage clamp protection requiring stable component supply and traceable sourcing.
Supply support for 1N5239C 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, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The 1N52xx series was developed as a legacy precision zener family targeting cost-sensitive yet reliability-critical analog functions - delivering stable voltage references in hermetically sealed glass packages for harsh-environment applications.
FAQ
What is the zener voltage tolerance of the 1N5239C?
The 1N5239C has a nominal zener voltage of 9.1 V with a tolerance of ±2%, verified per JEDEC specification Note 1. This means the actual measured VZ at IZT = 20 mA falls between 8.918 V and 9.282 V under thermal equilibrium conditions at 30°C lead temperature. This tighter tolerance distinguishes it from the ±5% 1N5239B variant.
What is the maximum power dissipation for the 1N5239C?
The 1N5239C is rated for 500 mW DC power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 4 mW/°C above that threshold. This rating assumes 3/8″ lead length and is based on steady-state thermal equilibrium - pulsed operation requires referencing Figure 7a for non-repetitive surge limits.
How does the temperature coefficient affect the 1N5239C's performance?
The 1N5239C has a positive temperature coefficient of +0.068 %/°C, meaning its zener voltage increases by approximately 6.2 mV per °C rise in junction temperature. Engineers must account for this drift when designing references for wide ambient ranges, using ∆V = θVZ·∆TJ to calculate worst-case deviation from nominal 9.1 V.
What package type is used for the 1N5239C?
The 1N5239C uses the DO-204AH (commonly called DO-35) package: a hermetically sealed glass axial-leaded case with double-slug construction, 3.05 mm diameter, and 5.08 mm length. Polarity is marked by a cathode band, and the package complies with JEDEC Case Outline 299-02.
Can the 1N5239C be used in forward-bias applications?
Yes - the 1N5239C specifies a maximum forward voltage (VF) of 1.1 V at IF = 200 mA, confirming its usability as a low-drop rectifier or clamping diode in forward conduction. However, its primary design intent and characterization are for reverse-bias zener regulation, so forward-mode reliability data is limited to this single DC point.
1N5239C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1N5239C FAQ
1.How can I place an order for 1N5239C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5239C 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 1N5239C reliable?
The price and inventory of 1N5239C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5239C is usually 5 days.
3.What payment methods are accepted for 1N5239C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5239C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5239C?
1N5239C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5239C 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 1N5239C?
For technical support, including 1N5239C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5239C requirements.
6.How does Aetrix verify that 1N5239C is sourced from the original manufacturer or authorized distributors?
All 1N5239C 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 1N5239C meets industry standards.
7.What is the process for return or replacement of 1N5239C?
All 1N5239C units undergo pre-shipment inspection (PSI). If there is an issue with 1N5239C, 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 1N5239C part is unused and in its original packaging.
Return procedure for 1N5239C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5239C Tags
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BZT52C5V6T-7
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MM5Z5V1ST1G
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