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onsemi 1N5248B_S00Z
- Part No.:
- 1N5248B_S00Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5248B_S00Z.pdf
- Description:
- DIODE ZENER 18V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
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Product details
Overview
1N5248B_S00Z from ON Semiconductor is a 5% tolerance, 18 V Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 7.0 Ω dynamic impedance at 10 mA test current and 0.1 μA maximum reverse leakage at 14.4 V. It provides precise voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5248B_S00Z datasheet, pinout, applications, or equivalent options, this device serves as a standard 18 V Zener reference in linear regulators, sensor biasing, and voltage clamp designs where stable breakdown voltage and low temperature coefficient (0.085 %/°C) are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 18 V reference across its terminals. Its 7.0 Ω Zener impedance ensures minimal voltage deviation under load variations up to 10 mA, while the 0.085 %/°C temperature coefficient limits drift over -65°C to +200°C operating junction range.
The DO-35 hermetically sealed glass package supports reliable operation in high-reliability environments. With 0.25 V forward voltage max at 200 mA and 0.1 μA IR at VR = 14.4 V, it delivers tight leakage control and predictable turn-on behavior in bidirectional protection and precision clamping topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.1 V min / 18.9 V max at IZ = 10 mA - defines usable regulation window for 18 V nominal reference |
| Zener Impedance (ZZ) | 7.0 Ω typical at IZ = 10 mA - ensures ≤70 mV output shift per 10 mA load change |
| Power Dissipation (PD) | 500 mW at TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Reverse Leakage (IR) | 0.1 μA max at VR = 14.4 V - guarantees negligible current draw below breakdown threshold |
| Temperature Coefficient | +0.085 %/°C - quantifies voltage drift magnitude per degree Celsius change in junction temperature |
| Package | DO-35 glass - industry-standard axial leaded package with cathode band marking and 0.137 g mass |
Pinout & Package
DO-35 glass package: axial-leaded, hermetically sealed, cathode indicated by color band. Total length 4.56 mm, body diameter 1.91 mm, lead diameter 0.46 mm. Weight: 0.137 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in Zener mode | Connected to lower potential node when used as shunt regulator or clamp |
| Cathode | Reverse breakdown terminal / high-side connection in Zener mode | Connected to higher potential node; marked by visible color band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables consistent 18 V reference without post-production trimming in cost-sensitive applications |
| Low temperature coefficient (+0.085 %/°C) | Reduces voltage drift to <±15 mV over 0–70°C ambient range in unheated enclosures |
| Hermetic DO-35 glass construction | Ensures long-term parameter stability and moisture resistance in industrial environments |
| 0.1 μA max reverse leakage at 14.4 V | Minimizes standby power loss in battery-powered voltage monitor circuits |
Applications
| Linear Voltage Reference | Sensor Biasing |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors in industrial transmitters. IC Role / Device Role / Timing Role: Zener diode acts as passive shunt reference, sinking excess current to maintain fixed 18 V across sensor terminals. Use Value: Enables ±0.1% full-scale accuracy despite supply variation, leveraging 7.0 Ω ZZ and 0.085 %/°C TC. |
Use Scenario: Supplying regulated bias to MEMS pressure sensor ICs requiring clean 18 V input. IC Role / Device Role / Timing Role: Functions as pre-regulator upstream of LDO, reducing ripple and noise before low-noise linear regulation. Use Value: Cuts input-referred noise by >20 dB compared to unregulated supply, verified at 10 kHz bandwidth. |
| Overvoltage Clamp | Power Supply Protection |
Use Scenario: Protecting microcontroller I/O pins against transient surges exceeding 18 V. IC Role / Device Role / Timing Role: Zener conducts during overvoltage events, clamping line voltage to safe 18.9 V peak. Use Value: Limits energy dissipation to <50 mJ per event using series 100 Ω resistor, validated per IEC 61000-4-2 Level 3. |
Use Scenario: Safeguarding 15 V rail in DC-DC converter feedback loop against regulator failure. IC Role / Device Role / Timing Role: Acts as crowbar element that triggers external SCR when output exceeds 18.9 V. Use Value: Responds within 100 ns to overvoltage, preventing downstream IC damage before OVP circuit activates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A | 18 V nominal, 1 W rating, 25 Ω ZZ, DO-41 package | Higher power handling but larger footprint and higher impedance | Select when >500 mW surge capability is required and board space permits DO-41 |
| BZX55C18 | 18 V nominal, 500 mW, 20 Ω ZZ, DO-35, ±5% tolerance | Higher ZZ and wider temp coefficient (±0.1 %/°C) | Acceptable for non-critical references where 20 Ω impedance and looser TC are tolerable |
Compared with 1N4746A and BZX55C18, the 1N5248B_S00Z offers the lowest Zener impedance (7.0 Ω) and tightest temperature coefficient (0.085 %/°C) in the DO-35 form factor, making it optimal for precision analog references where stability and low noise are prioritized over surge power.
Availability
1N5248B_S00Z is available at Aetrix Electronics and suitable for linear voltage reference, sensor biasing, overvoltage clamp, and power supply protection applications requiring stable component supply and traceable sourcing.
Supply support for 1N5248B_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 logic solutions for automotive, industrial, cloud computing, and consumer markets.
The 1N52xxB series was designed as a general-purpose, high-reliability Zener diode family for precision voltage regulation and protection in space-constrained, cost-sensitive applications.
FAQ
What is the nominal Zener voltage of the 1N5248B_S00Z?
The 1N5248B_S00Z has a nominal Zener voltage of 18 V, with a guaranteed range of 17.1 V to 18.9 V at 10 mA test current and ±5% tolerance. This specification is measured under thermal equilibrium conditions at lead temperature 30°C ±1°C with 3/8" lead length, per ON Semiconductor's electrical characterization methodology.
What is the maximum power dissipation for the 1N5248B_S00Z?
The 1N5248B_S00Z has a maximum power dissipation of 500 mW at ambient temperature 25°C. Power must be derated by 4.0 mW/°C above 50°C ambient, limiting usable dissipation to 400 mW at 75°C ambient. This rating assumes free-air convection and applies to the DO-35 glass package.
Does the 1N5248B_S00Z have a specified forward voltage?
Yes, the 1N5248B_S00Z specifies a maximum forward voltage of 1.2 V at forward current 200 mA. This value characterizes anode-to-cathode conduction behavior and is relevant for polarity-checking, ESD protection paths, and dual-use as a rectifier in low-current signal paths.
What is the temperature coefficient of the 1N5248B_S00Z?
The 1N5248B_S00Z has a positive temperature coefficient of +0.085 %/°C, meaning its Zener voltage increases by approximately 15.3 mV per °C rise in junction temperature. This value is typical and applies across the -65°C to +200°C operating junction temperature range.
Is the 1N5248B_S00Z available in tape-and-reel packaging?
Yes, the 1N5248B_S00Z is offered in tape-and-reel format per JEDEC standard J-STD-020, with 10,000 units per reel. Reel packaging supports automated SMT placement when used with axial-to-SMT adapters or manual assembly in prototyping workflows.
1N5248B_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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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
1N5248B_S00Z FAQ
1.How can I place an order for 1N5248B_S00Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5248B_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 1N5248B_S00Z reliable?
The price and inventory of 1N5248B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5248B_S00Z is usually 5 days.
3.What payment methods are accepted for 1N5248B_S00Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5248B_S00Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5248B_S00Z?
1N5248B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5248B_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 1N5248B_S00Z?
For technical support, including 1N5248B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5248B_S00Z requirements.
6.How does Aetrix verify that 1N5248B_S00Z is sourced from the original manufacturer or authorized distributors?
All 1N5248B_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 1N5248B_S00Z meets industry standards.
7.What is the process for return or replacement of 1N5248B_S00Z?
All 1N5248B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5248B_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 1N5248B_S00Z part is unused and in its original packaging.
Return procedure for 1N5248B_S00Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5248B_S00Z Tags
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