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onsemi 1N5244B_T50R
- Part No.:
- 1N5244B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5244B_T50R.pdf
- Description:
- DIODE ZENER 14V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,980
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Product details
Overview
1N5244B_T50R from ON Semiconductor is a 14 V, ±5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, optimized for voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It exhibits 15 Ω dynamic impedance at 5 mA test current, -0.080 %/°C temperature coefficient, and 0.25 μA reverse leakage at 11.2 V.
For engineers reviewing the 1N5244B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal stability in compact PCB layouts, low-leakage behavior under partial bias, and compatibility with wave-soldered DO-35 assembly processes.
Technical Context
This device operates as a two-terminal voltage reference where reverse-biased junction breakdown provides stable DC voltage clamping. Its DO-35 hermetically sealed glass package ensures long-term parameter stability and moisture resistance critical for industrial and automotive auxiliary circuits.
The 1N5244B_T50R is specified with a nominal Zener voltage of 14 V (min 13.3 V, typ 14 V, max 14.7 V) at IZ = 5 mA, 15 Ω Zener impedance (ZZ) at that current, and a negative temperature coefficient (-0.080 %/°C) confirming predictable drift behavior across -65°C to +200°C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14 V nominal, 13.3–14.7 V range at 5 mA - defines precise clamping threshold for feedback or protection circuits |
| Power Dissipation (PD) | 500 mW at 25°C, derated 4.0 mW/°C above 50°C - sets maximum continuous power handling in linear regulator or shunt reference use |
| Zener Impedance (ZZ) | 15 Ω at IZ = 5 mA - determines output voltage variation under load transients in reference applications |
| Temperature Coefficient (TC) | -0.080 %/°C - enables predictable, monotonic VZ drift for temperature-compensated designs |
| Reverse Leakage (IR) | 0.1 μA max at VR = 11.2 V - ensures minimal quiescent current in high-impedance bias networks |
| Package | DO-35 glass case with cathode band - supports automated placement and IR-reflow/wave soldering per JEDEC DO-204AH |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 0.533 mm diameter body, 4.56 mm length, cathode identified by color band. Weight: 0.137 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt configuration | Connected to ground or lower-potential node when used as voltage reference or clamp |
| Cathode | Zener breakdown terminal / high-side connection in shunt configuration | Connected to regulated rail or input node; marked by visible color band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables single-bin selection without post-manufacture trimming in cost-sensitive consumer power supplies |
| Hermetic glass DO-35 package | Guarantees parameter stability over 10+ years in humid or thermally cycled environments (e.g., outdoor sensors) |
| Low 0.1 μA leakage at 80% VZ | Minimizes error in high-resistance divider networks used with op-amp references or microcontroller ADC inputs |
| Negative TC of -0.080 %/°C | Allows pairing with positive-TC components (e.g., silicon diodes) to achieve near-zero net drift in precision references |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt reference element in optocoupler feedback loop, setting precise secondary-side voltage threshold. Use Value: 14 V nominal Zener voltage matches common TL431 replacement requirements while offering tighter TC and lower leakage than older alternatives. | Use Scenario: Protecting microcontroller I/O pins or analog front-end inputs from ESD or surge events. IC Role / Device Role / Timing Role: Passive clamping device placed between signal line and ground, conducting only above safe voltage threshold. Use Value: 15 Ω Zener impedance ensures rapid voltage limiting during fast transients, minimizing stress on downstream CMOS inputs. |
| Reference Voltage Source | Current Source Bias |
Use Scenario: Providing stable bias for op-amp comparators or sensor excitation circuits in battery-powered instrumentation. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed potential for precision analog circuitry. Use Value: -0.080 %/°C TC and 0.1 μA leakage enable sub-10 ppm/°C drift performance in unbuffered configurations with proper thermal layout. | Use Scenario: Setting constant current for LED drivers or transistor bias networks via series resistor + Zener drop. IC Role / Device Role / Timing Role: Voltage-setting element defining emitter/base bias point in discrete current mirror or constant-current sink. Use Value: 500 mW power rating supports up to ~35 mA continuous current (at 14 V), sufficient for medium-brightness indicator LEDs or small-signal transistor stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 Ω higher ZZ (16 Ω), same DO-41 package but larger footprint and 1 W rating | Higher power dissipation margin; less suitable for space-constrained DO-35 layouts | Select when board area allows larger package and >500 mW headroom is required |
| BZX55C14 | Same 14 V rating and ±5% tolerance, but plastic DO-35 package with higher leakage (0.5 μA @ 11.2 V) and wider TC range (-0.05 to +0.05 %/°C) | Lower reliability in high-humidity or high-temperature environments due to non-hermetic construction | Select for cost-sensitive commercial applications where hermeticity is not mandated |
Compared with 1N4742A and BZX55C14, the 1N5244B_T50R delivers superior thermal stability and lower leakage in a compact, hermetically sealed glass package-making it preferred for industrial control, automotive sub-systems, and precision analog designs where long-term parameter drift must be minimized.
Availability
1N5244B_T50R is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, precision voltage reference, and current source bias applications requiring stable component supply and consistent DO-35 form factor compliance.
Supply support for 1N5244B_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 is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio designed for general-purpose voltage regulation and reference functions in cost-sensitive, high-reliability applications demanding stable parameters and proven DO-35 manufacturability.
FAQ
What is the nominal Zener voltage of the 1N5244B_T50R?
The 1N5244B_T50R has a nominal Zener voltage of 14 V, with a guaranteed range of 13.3 V to 14.7 V at a test current of 5 mA. This value is measured under thermal equilibrium conditions at lead temperature of 30°C ± 1°C, per ON Semiconductor's characterization methodology documented in Rev. 3 of the 1N5221B–1N5263B datasheet.
Does the 1N5244B_T50R have a hermetic package?
Yes, the 1N5244B_T50R uses a hermetically sealed DO-35 glass package compliant with JEDEC DO-204AH. This construction prevents moisture ingress and ensures long-term parameter stability-critical for applications exposed to humidity, thermal cycling, or extended service life requirements. The package weight is 0.137 g.
What is the Zener impedance of the 1N5244B_T50R and why does it matter?
The 1N5244B_T50R exhibits a Zener impedance (ZZ) of 15 Ω at 5 mA test current. This low dynamic impedance means the device maintains tight voltage regulation under varying load conditions-essential for minimizing output ripple in shunt reference circuits and ensuring accurate clamping during transient overvoltage events.
Can the 1N5244B_T50R be used in surface-mount assemblies?
No, the 1N5244B_T50R is an axial-lead DO-35 through-hole device and is not suitable for standard SMT reflow processes. It is designed for wave soldering or hand-soldering in through-hole PCB layouts. For surface-mount equivalents, consider ON Semiconductor's NSZ series or other SOD-123 packaged Zeners-not direct replacements for 1N5244B_T50R.
What is the maximum reverse leakage current for the 1N5244B_T50R?
The maximum reverse leakage current (IR) for the 1N5244B_T50R is 0.1 μA at VR = 11.2 V (80% of nominal VZ). This ultra-low leakage supports high-impedance bias networks and precision reference applications where parasitic current paths could otherwise introduce measurable error into analog signal chains.
1N5244B_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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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
1N5244B_T50R FAQ
1.How can I place an order for 1N5244B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5244B_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 1N5244B_T50R reliable?
The price and inventory of 1N5244B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5244B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5244B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5244B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5244B_T50R?
1N5244B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5244B_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 1N5244B_T50R?
For technical support, including 1N5244B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5244B_T50R requirements.
6.How does Aetrix verify that 1N5244B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5244B_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 1N5244B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5244B_T50R?
All 1N5244B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5244B_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 1N5244B_T50R part is unused and in its original packaging.
Return procedure for 1N5244B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5244B_T50R Tags
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