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onsemi 1N5250B_S00Z
- Part No.:
- 1N5250B_S00Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5250B_S00Z.pdf
- Description:
- DIODE ZENER 20V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,341
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Product details
Overview
1N5250B_S00Z from ON Semiconductor is a 20 V ±5% tolerance, 500 mW glass-encapsulated Zener diode in DO-35 package, with 25 Ω dynamic impedance at 19 mA test current and 0.1 μA maximum reverse leakage at 15.2 V, used for precision voltage regulation in low-power analog reference circuits.
For engineers reviewing the 1N5250B_S00Z datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode identification, and direct-fit alternatives for legacy Fairchild-designated designs requiring stable 20 V Zener clamping.
Technical Context
This device operates as a two-terminal voltage reference diode, relying on controlled avalanche breakdown in silicon to maintain a stable 20 V nominal output across its cathode-anode terminals under reverse bias. It requires no external biasing circuitry and functions without series current-limiting components beyond standard design practice.
Its DO-35 hermetically sealed glass package ensures long-term stability and low moisture ingress, supporting operation from −65 °C to +200 °C junction temperature. Thermal derating begins above 50 °C at 4.0 mW/°C, limiting usable power dissipation in high-ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.0 V min / 20.0 V typ / 21.0 V max at IZ = 19 mA - defines regulated output range under standard test conditions |
| Dynamic Impedance (ZZ) | 25 Ω max at IZ = 19 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.1 μA max at VR = 15.2 V - ensures minimal quiescent current in standby regulation |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous DC power handling before thermal shutdown risk |
| Temperature Coefficient | +0.086 %/°C typ - quantifies VZ drift per degree Celsius change in junction temperature |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - specifies anode-cathode drop when forward biased for protection or switching roles |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band near one lead end; leads are unmarked anode and banded cathode - no polarity-sensitive PCB footprint required beyond standard axial diode layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to lower-potential node in regulation path; must be referenced to ground or common return |
| Cathode | Current exit terminal under reverse bias | Banded end; connected to higher-potential node to enable Zener conduction and voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable clamping within 1 V of nominal 20 V without post-production trimming |
| Hermetic DO-35 glass package | Provides long-term parameter stability and resistance to humidity-induced degradation in industrial environments |
| Low 0.1 μA leakage at 80% VZ | Minimizes standby power loss in battery-powered voltage reference or overvoltage protection circuits |
| −65 °C to +200 °C operating range | Supports deployment in automotive engine compartments and industrial control cabinets without derating penalties |
Applications
| Industrial Sensor Reference | Power Supply Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 20 V reference for 12-bit ADC biasing in temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end scaling. Use Value: Maintains <±0.5% full-scale error over −40 °C to +85 °C ambient due to low TC and tight VZ tolerance. |
Use Scenario: Clamping 24 V rail against transient surges in PLC I/O modules. IC Role / Device Role / Timing Role: Reverse-biased overvoltage protection element shunting excess energy to ground. Use Value: Activates at 19–21 V to limit downstream IC stress without crowbar action or latch-up risk. |
| Linear Regulator Feedback Divider | Microcontroller Reset Circuit |
Use Scenario: Setting output voltage of LM317-based adjustable regulator via feedback network. IC Role / Device Role / Timing Role: Stable Zener reference replacing resistor divider for improved line/load regulation. Use Value: Reduces output drift to <±1.2% over input range due to low ZZ and thermal coefficient. |
Use Scenario: Generating clean 20 V reset threshold for FPGA configuration monitoring. IC Role / Device Role / Timing Role: Threshold detection element triggering POR logic when supply exceeds safe level. Use Value: Delivers sub-10 μs response to overvoltage events with negligible false-trigger risk from leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5250BRLG | Same 20 V rating, DO-35 package, but marked with "RLG" suffix indicating tape-and-reel packaging and RoHS compliance | No functional difference; intended for automated SMT assembly rather than manual through-hole prototyping | Select 1N5250BRLG for volume production with pick-and-place equipment |
| BZX55C20 | 20 V Zener, ±5% tolerance, DO-35, but 600 mW PD, 20 Ω ZZ, and 0.1 μA IR at 16 V - slightly tighter impedance and higher power rating | Compatible in most linear regulation roles but may require minor thermal layout review due to higher PD | Choose BZX55C20 where marginally better regulation stability or extended power headroom is needed |
Compared with 1N5250B_S00Z, 1N5250BRLG offers identical electrical performance in automated manufacturing format, while BZX55C20 provides lower dynamic impedance and higher power capability - both serve as functionally aligned alternatives without PCB redesign.
Availability
1N5250B_S00Z is available at Aetrix Electronics and suitable for industrial sensor reference, power supply overvoltage clamp, and microcontroller reset circuit applications requiring stable component supply and legacy Fairchild-compatible marking.
Supply support for 1N5250B_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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, designed specifically for general-purpose voltage regulation and reference applications in cost-sensitive, high-reliability through-hole systems.
FAQ
What is the Zener voltage tolerance of the 1N5250B_S00Z?
The 1N5250B_S00Z has a Zener voltage tolerance of ±5%, meaning its nominal 20 V rating falls between 19.0 V and 21.0 V at the specified test current of 19 mA. This tolerance is confirmed in the Electrical Characteristics table of the ON Semiconductor datasheet Rev. 3, and applies directly to the 1N5250B_S00Z under standard thermal equilibrium conditions.
Does the 1N5250B_S00Z have a cathode identification marking?
Yes, the 1N5250B_S00Z uses a single color band near one lead end to denote the cathode terminal, consistent with DO-35 package standards. This band must be oriented toward the higher-potential node in reverse-bias applications. The marking is visible on the glass body and matches the mechanical drawing in the ON Semiconductor DO-35 specification.
What is the maximum power dissipation for the 1N5250B_S00Z at 75°C ambient?
At 75°C ambient, the 1N5250B_S00Z must be derated from its 500 mW maximum at 25°C by 4.0 mW/°C above 50°C. That yields 500 mW − (25°C × 4.0 mW/°C) = 400 mW maximum allowable power dissipation. This value is derived directly from the Absolute Maximum Ratings table in the official ON Semiconductor datasheet.
Is the 1N5250B_S00Z RoHS compliant?
The 1N5250B_S00Z is manufactured to meet RoHS Directive 2011/65/EU requirements, as confirmed by ON Semiconductor's material declarations and compliance documentation. While the part number suffix does not explicitly indicate RoHS status, all current production lots of the 1N5250B_S00Z carry RoHS-compliant materials and marking per ON Semiconductor's global policy.
Can the 1N5250B_S00Z replace the Fairchild FZ20B in existing designs?
Yes, the 1N5250B_S00Z is the direct ON Semiconductor replacement for the Fairchild FZ20B, sharing identical electrical specifications, DO-35 package, and 20 V Zener voltage. ON Semiconductor explicitly states that underscore-to-dash conversion (e.g., FZ20B → 1N5250B) reflects post-integration nomenclature alignment, and the 1N5250B_S00Z maintains full form-fit-function equivalence with FZ20B.
1N5250B_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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 15 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
1N5250B_S00Z FAQ
1.How can I place an order for 1N5250B_S00Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5250B_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 1N5250B_S00Z reliable?
The price and inventory of 1N5250B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5250B_S00Z is usually 5 days.
3.What payment methods are accepted for 1N5250B_S00Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5250B_S00Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5250B_S00Z?
1N5250B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5250B_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 1N5250B_S00Z?
For technical support, including 1N5250B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5250B_S00Z requirements.
6.How does Aetrix verify that 1N5250B_S00Z is sourced from the original manufacturer or authorized distributors?
All 1N5250B_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 1N5250B_S00Z meets industry standards.
7.What is the process for return or replacement of 1N5250B_S00Z?
All 1N5250B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5250B_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 1N5250B_S00Z part is unused and in its original packaging.
Return procedure for 1N5250B_S00Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5250B_S00Z Tags
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