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onsemi 1N5245B_T50R
- Part No.:
- 1N5245B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5245B_T50R.pdf
- Description:
- DIODE ZENER 15V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,928
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Product details
Overview
1N5245B_T50R from ON Semiconductor is a 15 V ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 16 Ω dynamic impedance at 20 mA test current and 0.1 μA reverse leakage at 11.4 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5245B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy (14.25–15.75 V), thermal coefficient (+0.082 %/°C), junction temperature range (−65 to +200°C), and DO-35 mechanical compatibility with axial through-hole PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its Zener voltage is specified at IZ = 20 mA with thermal equilibrium maintained at lead temperature of 30°C ±1°C and 3/8″ lead length. The −65°C to +200°C operating junction temperature range supports industrial and automotive under-hood environments.
It exhibits a positive temperature coefficient of +0.082 %/°C above ~5 V, enabling stable regulation across temperature without external compensation. Reverse leakage remains ≤0.1 μA at VR = 11.4 V, ensuring minimal quiescent current draw in battery-powered sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, 14.25–15.75 V min/max at IZ = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 500 mW at TA = 25°C, derates 4.0 mW/°C above 50°C - sets maximum continuous power handling in free-air |
| Zener Impedance (ZZ) | 16 Ω max at IZ = 20 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 11.4 V - ensures negligible standby current in undervoltage lockout or bias networks |
| Temp Coefficient (TC) | +0.082 %/°C - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Junction Temp Range | −65°C to +200°C - enables use in extended-temperature industrial, aerospace, and under-hood automotive systems |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - supports bidirectional clamping or dual-purpose protection when forward-biased |
Pinout & Package
DO-35 hermetically sealed glass axial package (JEDEC DO-204AH), 2.0 mm diameter × 4.56 mm body length, 0.137 g weight. Cathode identified by single color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference ground node in reverse-bias regulation | Connected to system ground or lower-potential rail when used as shunt regulator |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Connected to input supply via series resistor; delivers stable 15 V to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±5% (14.25–15.75 V) - reduces need for post-regulation trimming in precision analog supplies |
| Low dynamic impedance | 16 Ω max at 20 mA - maintains <160 mV output shift per 10 mA load change, improving regulation stability |
| Hermetic glass package | DO-35 with moisture-resistant seal - ensures long-term reliability in humid or high-reliability environments |
| High-temperature operation | Junction rating up to +200°C - supports deployment in engine control units and industrial motor drives |
| Controlled temp coefficient | +0.082 %/°C - enables predictable, linear drift for compensated reference designs |
Applications
| Industrial Sensor Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 15 V reference for 4–20 mA transmitter signal conditioning circuitry in factory automation sensors. IC Role / Device Role / Timing Role: Shunt voltage reference connected across op-amp feedback network to set precise gain and offset. Use Value: ±5% initial tolerance and +0.082 %/°C TC enable <±2% total error over −40°C to +85°C without calibration. | Use Scenario: Protecting microcontroller I/O pins from transient surges on 12 V automotive CAN bus lines. IC Role / Device Role / Timing Role: Bidirectional clamp: cathode tied to 12 V rail, anode to ground; conducts during positive transients above 15 V. Use Value: 500 mW power rating absorbs 100 ns/1 kV spikes per ISO 7637-2; 0.1 μA leakage avoids loading sensitive inputs. |
| Low-Power Bias Supply | Linear Regulator Pre-Regulator |
Use Scenario: Generating clean 15 V bias for RF front-end LNA stages in battery-powered IoT gateways. IC Role / Device Role / Timing Role: Shunt regulator feeding low-noise LDO input; filters ripple from switching DC-DC converter output. Use Value: 16 Ω ZZ attenuates >60 dB of 1 MHz switching noise before LDO stage, reducing EMI susceptibility. | Use Scenario: Reducing dropout voltage stress on 12 V linear regulators powering FPGA core rails in test equipment. IC Role / Device Role / Timing Role: Pre-regulator dropping 24 V supply to 15 V, lowering power dissipation in downstream pass transistor. Use Value: 500 mW rating allows continuous 33 mA shunt current, cutting LDO thermal load by 40% vs. direct 24 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 15 V nominal, ±5%, 1 W rating, DO-41 package, ZZ = 14 Ω @ 25 mA | Higher power handling but larger footprint; requires PCB layout change | Select when >500 mW surge capability or higher continuous current is required |
| BZX55-C15 | 15 V nominal, ±5%, 500 mW, DO-35, ZZ = 20 Ω @ 5 mA, TC = +0.075 %/°C | Lower test current (5 mA) and slightly lower temp coefficient | Prefer for ultra-low-current bias networks where 5 mA test condition better matches operating point |
Compared with 1N4744A and BZX55-C15, the 1N5245B_T50R offers identical voltage spec and power rating as BZX55-C15 but tighter ZZ at 20 mA, while providing smaller DO-35 footprint than 1N4744A's DO-41-making it optimal for space-constrained, medium-current regulation.
Availability
1N5245B_T50R is available at Aetrix Electronics and suitable for industrial sensor reference, overvoltage clamp, and low-power bias supply applications requiring stable component supply and long-lifecycle support.
Supply support for 1N5245B_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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.
The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio designed for general-purpose voltage regulation, reference, and protection in cost-sensitive, high-reliability through-hole designs.
FAQ
What is the Zener voltage tolerance of the 1N5245B_T50R?
The 1N5245B_T50R has a Zener voltage tolerance of ±5%, specifying a minimum of 14.25 V and maximum of 15.75 V at IZ = 20 mA and thermal equilibrium at 30°C ±1°C. This tolerance is guaranteed per ON Semiconductor's 1N5221B–1N5263B datasheet Rev. 3, December 2018, and applies to all units marked "1N5245B" in the DO-35 package.
Does the 1N5245B_T50R have a specified forward voltage?
Yes, the 1N5245B_T50R has a maximum forward voltage of 1.2 V at forward current IF = 200 mA, as documented in the Absolute Maximum Ratings table of the official ON Semiconductor datasheet. This parameter supports bidirectional clamping applications where the device may conduct in forward bias during negative transients.
What is the thermal resistance junction-to-ambient for the 1N5245B_T50R?
The 1N5245B_T50R does not specify a numerical junction-to-ambient thermal resistance (θJA) in its datasheet. Instead, ON Semiconductor provides a linear derating curve: 4.0 mW/°C above 50°C ambient, based on 500 mW maximum power at 25°C. This implies an effective θJA ≈ 250°C/W under natural convection in standard JEDEC test conditions.
Can the 1N5245B_T50R be used in surface-mount designs?
No, the 1N5245B_T50R is exclusively offered in the axial DO-35 glass package and is not available in surface-mount variants. Its leads require through-hole mounting with 3/8″ lead length for thermal testing compliance. For SMT alternatives, consider ON Semiconductor's NZ9F15V or similar SOD-123 Zeners-but these are not drop-in replacements due to different package, thermal, and electrical characteristics.
What does the "T50R" suffix mean in 1N5245B_T50R?
The "T50R" suffix in 1N5245B_T50R denotes tape-and-reel packaging per ON Semiconductor's internal ordering nomenclature: "T50" indicates 50 mm tape width, and "R" signifies reel packaging. This is a packaging variant of the base 1N5245B device and does not alter electrical or thermal specifications; all performance parameters match the standard 1N5245B in DO-35.
1N5245B_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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 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
1N5245B_T50R FAQ
1.How can I place an order for 1N5245B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5245B_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 1N5245B_T50R reliable?
The price and inventory of 1N5245B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5245B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5245B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5245B_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5245B_T50R?
1N5245B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5245B_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 1N5245B_T50R?
For technical support, including 1N5245B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5245B_T50R requirements.
6.How does Aetrix verify that 1N5245B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5245B_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 1N5245B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5245B_T50R?
All 1N5245B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5245B_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 1N5245B_T50R part is unused and in its original packaging.
Return procedure for 1N5245B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5245B_T50R Tags
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