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onsemi 1N5247B_T50R
- Part No.:
- 1N5247B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5247B_T50R.pdf
- Description:
- DIODE ZENER 17V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,388
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Product details
Overview
1N5247B_T50R from ON Semiconductor is a 17 V, ±5% tolerance, 500 mW glass-encapsulated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It exhibits 19 Ω dynamic impedance at 12 mA test current and a temperature coefficient of +0.084 %/°C.
For engineers reviewing the 1N5247B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include its 17 V nominal Zener voltage, 500 mW power rating, DO-35 hermetic glass package, 19 Ω Zener impedance, and +0.084 %/°C temperature coefficient - all critical for stable voltage reference design in industrial and consumer power management systems.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain a stable DC voltage across its terminals when biased above VZ. Its DO-35 glass package ensures hermetic sealing and thermal stability up to +200°C junction temperature.
The 1N5247B_T50R is characterized at IZ = 12 mA with VZ = 16.15–17.85 V (min–max), ZZ = 19 Ω, and IR ≤ 0.1 μA at VR = 13.6 V, supporting low-leakage, high-stability biasing in precision analog signal chains and regulator error amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15–17.85 V at IZ = 12 mA - defines regulated output voltage range under standard test conditions |
| Power Dissipation (PD) | 500 mW at TA = 25°C - maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZ) | 19 Ω at IZ = 12 mA - low dynamic resistance ensures minimal output voltage variation under load changes |
| Temperature Coefficient (TC) | +0.084 %/°C - positive drift rate enables predictable VZ shift over temperature for compensation-aware designs |
| Reverse Leakage (IR) | ≤ 0.1 μA at VR = 13.6 V - ultra-low leakage preserves accuracy in high-impedance reference nodes |
| Package | DO-35 glass axial - hermetically sealed, JEDEC-standard package with cathode band marking and 0.137 g mass |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter body, 4.56 mm length, cathode indicated by color band. Leads are tinned copper-clad steel, suitable for wave or hand soldering at 230°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; forms return path during Zener operation |
| Cathode | Reverse-biased Zener terminal / Regulated output node | Connected to input supply via current-limiting resistor; delivers stable 17 V reference voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Tight initial accuracy enables single-diode reference use without trimming in cost-sensitive applications |
| Hermetic DO-35 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments (e.g., industrial controls) |
| Low 19 Ω Zener impedance | Minimizes output voltage deviation under varying load currents, improving regulation in feedback networks |
| +0.084 %/°C temperature coefficient | Predictable positive drift allows straightforward thermal compensation in precision references |
| 0.1 μA max reverse leakage at 13.6 V | Preserves high-impedance node integrity in battery-powered or low-power sensor interfaces |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Used in the optocoupler feedback loop of isolated AC/DC flyback converters to regulate output voltage. IC Role / Device Role / Timing Role: Provides precise 17 V reference for TL431-type shunt regulators or error amplifier biasing. Use Value: Enables ±1% output regulation accuracy over line/load/temperature with minimal external components. |
Use Scenario: Placed across sensitive IC inputs to clamp transient overvoltages exceeding 17 V. IC Role / Device Role / Timing Role: Acts as passive crowbar element diverting surge current to ground before damage occurs. Use Value: Limits peak voltage to 17.85 V (max VZ) with fast response (<1 ns), protecting 16 V-rated logic inputs. |
| Instrumentation Reference | Current Source Biasing |
Use Scenario: Supplies stable bias to op-amp-based voltage-to-current converters in 4–20 mA transmitter circuits. IC Role / Device Role / Timing Role: Serves as primary voltage reference for DAC output scaling and loop calibration. Use Value: Delivers <0.1% long-term drift due to hermetic packaging, meeting industrial calibration requirements. |
Use Scenario: Sets gate bias for constant-current LED driver MOSFETs in indicator panels. IC Role / Device Role / Timing Role: Establishes fixed 17 V gate drive level independent of supply ripple. Use Value: Maintains LED current stability within ±2% over 0–70°C ambient, leveraging low ZZ and TC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A | 18 V nominal, 1.0 W power rating, DO-41 package, ±5% tolerance, ZZ = 14 Ω at 12 mA | Higher power handling supports higher current reference designs; larger DO-41 footprint requires PCB layout change | Select when >500 mW dissipation or lower ZZ is required; not drop-in due to package and voltage mismatch |
| BZX55-C16 | 16 V nominal, ±5% tolerance, 500 mW, DO-35 package, ZZ = 25 Ω at 5 mA, TC = +0.06 %/°C | Lower nominal voltage and higher ZZ reduce regulation accuracy in high-precision feedback paths | Acceptable where 16 V suffices and tighter TC is less critical; same DO-35 footprint enables mechanical compatibility |
Compared with 1N4746A and BZX55-C16, the 1N5247B_T50R offers optimal balance of 17 V targeting, DO-35 form factor, and 19 Ω impedance for space-constrained, low-power reference designs - making it preferred for legacy board refreshes and compact industrial modules where voltage granularity matters.
Availability
1N5247B_T50R is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and instrumentation reference applications requiring stable component supply, consistent parametric performance, and long-term obsolescence mitigation.
Supply support for 1N5247B_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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio, engineered for reliable voltage regulation and reference functions in cost-sensitive, high-volume analog circuits where DO-35 packaging and tight tolerances are essential.
FAQ
What is the nominal Zener voltage of the 1N5247B_T50R?
The 1N5247B_T50R has a nominal Zener voltage of 17 V, with a guaranteed range of 16.15 V to 17.85 V at a test current of 12 mA. This value is specified per ON Semiconductor's 1N5221B–1N5263B Rev. 3 datasheet and reflects the device's core function as a precision voltage reference diode.
What package type does the 1N5247B_T50R use?
The 1N5247B_T50R uses the DO-35 glass axial package - a hermetically sealed, JEDEC-standard case with cathode band marking, 2.0 mm body diameter, and 4.56 mm length. Its construction ensures long-term stability and moisture resistance, as confirmed in the official ON Semiconductor package drawing DO35AREV03.
What is the maximum power dissipation rating for the 1N5247B_T50R?
The 1N5247B_T50R has a maximum power dissipation of 500 mW at ambient temperature (TA) of 25°C. It derates linearly at 4.0 mW/°C above 50°C, meaning usable power drops to 400 mW at 75°C ambient - a critical constraint for thermal design in enclosed or high-temperature environments.
Does the 1N5247B_T50R have a specified temperature coefficient?
Yes, the 1N5247B_T50R has a temperature coefficient of +0.084 %/°C, indicating its Zener voltage increases predictably with rising junction temperature. This value is measured and documented in the Electrical Characteristics table of the ON Semiconductor datasheet, enabling accurate thermal compensation in precision reference circuits.
What is the Zener impedance (ZZ) of the 1N5247B_T50R at its rated test current?
The Zener impedance (ZZ) of the 1N5247B_T50R is 19 Ω at IZ = 12 mA, as specified in the ON Semiconductor 1N5221B–1N5263B datasheet. This low dynamic impedance directly determines how tightly the device regulates voltage under varying load or current conditions in practical applications.
1N5247B_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):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 13 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
1N5247B_T50R FAQ
1.How can I place an order for 1N5247B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5247B_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 1N5247B_T50R reliable?
The price and inventory of 1N5247B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5247B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5247B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5247B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5247B_T50R?
1N5247B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5247B_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 1N5247B_T50R?
For technical support, including 1N5247B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5247B_T50R requirements.
6.How does Aetrix verify that 1N5247B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5247B_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 1N5247B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5247B_T50R?
All 1N5247B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5247B_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 1N5247B_T50R part is unused and in its original packaging.
Return procedure for 1N5247B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5247B_T50R Tags
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