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onsemi 1N5244B_T26A
- Part No.:
- 1N5244B_T26A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5244B_T26A.pdf
- Description:
- DIODE ZENER 14V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,493
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Product details
Overview
1N5244B_T26A from ON Semiconductor is a 14 V, ±5% tolerance, 500 mW silicon Zener diode in DO-35 glass package, designed for precision voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers 14.7 V nominal Zener voltage at 5 mA test current, with 15 Ω dynamic impedance and 0.1 μA reverse leakage at 11.2 V.
For engineers reviewing the 1N5244B_T26A datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, thermal derating behavior, cathode identification, and direct alternatives for voltage reference design, BOM replacement, and legacy Fairchild-to-ON transition support.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 14 V nominal rating targets mid-range reference needs where higher-voltage Zeners (e.g., >15 V) exhibit rising temperature coefficients and lower-voltage types (<10 V) suffer from higher dynamic impedance.
The device uses a planar-diffused junction in hermetically sealed DO-35 glass packaging, enabling reliable operation from −65 °C to +200 °C junction temperature. Thermal derating begins at 50 °C ambient, reducing power dissipation by 4.0 mW/°C to ensure safe junction temperature limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3 V min / 14 V typ / 14.7 V max @ IZ = 5 mA - defines tight 5% tolerance band for stable reference accuracy |
| Dynamic Impedance (ZZ) | 15 Ω max @ IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 μA max @ VR = 11.2 V - guarantees low quiescent current in high-impedance bias networks |
| Power Dissipation (PD) | 500 mW @ TA ≤ 50 °C - supports continuous operation in compact PCB layouts without forced cooling |
| Temperature Coefficient (TC) | +0.080 %/°C typ - enables predictable drift compensation in temperature-sensitive references |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms standard silicon PN junction behavior for bidirectional testing |
| Package | DO-35 glass case with cathode band - industry-standard through-hole footprint compatible with JEDEC DO-204AH |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter × 4.56 mm length, 0.137 g weight, cathode identified by color band on body. Lead spacing T26A denotes 14.00 mm minimum lead length per JEDEC specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; output voltage appears between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables single-bin selection without post-assembly trimming in cost-sensitive consumer power supplies |
| Low 15 Ω dynamic impedance | Maintains <±10 mV regulation error across 1–10 mA load current changes in feedback networks |
| Hermetic DO-35 glass package | Ensures long-term parameter stability in humid or high-reliability industrial environments |
| −65 °C to +200 °C operating range | Supports deployment in under-hood automotive modules and downhole sensing electronics |
| 0.1 μA max reverse leakage | Permits use in ultra-low-power battery-backed voltage monitors with >10-year shelf life |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using TL431-based optocoupler feedback. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 14 V threshold for error amplifier biasing. Use Value: Tight 5% tolerance and low ZZ minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced voltage spikes on 12 V automotive sensor lines. IC Role / Device Role / Timing Role: Passive clamping element diverting transient energy above 14.7 V to ground. Use Value: Fast response and low leakage preserve signal integrity while absorbing up to 500 mW of surge energy. |
| Low-Power Analog Sensor Biasing | Legacy Equipment Voltage Calibration |
Use Scenario: Providing stable excitation voltage for resistive bridge sensors in portable medical devices. IC Role / Device Role / Timing Role: Precision DC reference source for ratiometric ADC measurement systems. Use Value: +0.080 %/°C TC allows predictable drift modeling and software compensation in firmware. |
Use Scenario: Replacing obsolete Fairchild FZ14B in field-service calibration of industrial panel meters. IC Role / Device Role / Timing Role: Drop-in functional replacement maintaining identical electrical interface and footprint. Use Value: Same DO-35 package, 14 V rating, and 5% tolerance ensures zero rework during repair or upgrade. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 Ω higher ZZ, same DO-41 package but 2.5 mm larger diameter | Lower voltage rating requires circuit redesign; DO-41 footprint incompatible with DO-35 pads | Select only if board layout allows mechanical adaptation and system tolerates 12 V reference |
| BZX55C15 | 15 V nominal, ±5% tolerance, 30 Ω ZZ, same DO-35 package and cathode marking | 1 V higher Zener voltage shifts regulation point; higher impedance increases load regulation error | Acceptable for non-critical 15 V references where 14 V precision is not required |
Compared with 1N5244B_T26A, 1N4742A requires PCB pad revision due to DO-41 vs. DO-35 mechanical mismatch, while BZX55C15 offers identical packaging but trades 1 V higher voltage and reduced regulation accuracy for broader availability in European distribution channels.
Availability
1N5244B_T26A is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power analog sensor biasing requiring stable component supply and long-lifecycle support.
Supply support for 1N5244B_T26A 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 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, engineered for general-purpose voltage regulation and reference applications where reliability, tight tolerance, and wide temperature operation are essential.
FAQ
What is the Zener voltage tolerance of the 1N5244B_T26A?
The 1N5244B_T26A has a guaranteed ±5% Zener voltage tolerance, meaning its nominal 14 V rating falls between 13.3 V and 14.7 V at 5 mA test current. This tolerance is confirmed in the ON Semiconductor datasheet Rev. 3 (December 2018), Table "Electrical Characteristics", row for 1N5244B. The 1N5244B_T26A maintains this specification across its full operating temperature range.
Does the 1N5244B_T26A have the same package as the original Fairchild part?
Yes, the 1N5244B_T26A retains the DO-35 glass axial package with cathode band marking and 14.00 mm minimum lead length (T26A designation), fully matching the mechanical form factor of the legacy Fairchild FZ14B. No PCB layout changes are needed when migrating from Fairchild to ON Semiconductor's 1N5244B_T26A.
What is the maximum power dissipation for the 1N5244B_T26A at 75°C ambient?
At 75°C ambient, the 1N5244B_T26A must be derated from its 500 mW maximum: derating starts at 50°C at 4.0 mW/°C, so 25°C above 50°C yields a 100 mW reduction. Therefore, maximum allowable power dissipation is 400 mW. This value ensures junction temperature remains within the −65 °C to +200 °C operating limit.
How does the temperature coefficient of the 1N5244B_T26A affect long-term reference stability?
The 1N5244B_T26A has a typical temperature coefficient of +0.080 %/°C, meaning its Zener voltage increases by ~11.2 mV per °C rise above 25°C. In a 50°C ambient shift, this results in ~560 mV total drift - a key consideration for high-accuracy references. System-level compensation or selection of tighter TC variants may be required for sub-0.5% total error budgets.
Can the 1N5244B_T26A be used as a substitute for the 1N5245B in a circuit?
No - the 1N5245B is rated for 15 V nominal (14.25–15.75 V), while the 1N5244B_T26A is rated for 14 V nominal (13.3–14.7 V). Substituting them alters the regulation point by 1 V, potentially causing overvoltage or undervoltage in sensitive circuits. Their dynamic impedances (16 Ω vs. 15 Ω) and leakage currents (0.1 μA vs. 0.1 μA) are similar, but voltage mismatch prohibits direct interchange.
1N5244B_T26A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Box (TB)
- 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_T26A FAQ
1.How can I place an order for 1N5244B_T26A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5244B_T26A 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_T26A reliable?
The price and inventory of 1N5244B_T26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5244B_T26A is usually 5 days.
3.What payment methods are accepted for 1N5244B_T26A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5244B_T26A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5244B_T26A?
1N5244B_T26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5244B_T26A 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_T26A?
For technical support, including 1N5244B_T26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5244B_T26A requirements.
6.How does Aetrix verify that 1N5244B_T26A is sourced from the original manufacturer or authorized distributors?
All 1N5244B_T26A 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_T26A meets industry standards.
7.What is the process for return or replacement of 1N5244B_T26A?
All 1N5244B_T26A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5244B_T26A, 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_T26A part is unused and in its original packaging.
Return procedure for 1N5244B_T26A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5244B_T26A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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