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onsemi 1N5260B_T50R
- Part No.:
- 1N5260B_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5260B_T50R.pdf
- Description:
- DIODE ZENER 43V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,682
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Product details
Overview
1N5260B_T50R from ON Semiconductor is a 43 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C with 93 Ω dynamic impedance at 10 mA test current and 0.25 μA maximum reverse leakage at 33 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the 1N5260B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), temperature coefficient (+0.095 %/°C), junction temperature range (−65 to +200°C), and DO-35 mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates in reverse breakdown mode with a nominal Zener voltage of 43 V at IZ = 10 mA, exhibiting a positive temperature coefficient of +0.095 %/°C - indicating voltage increases with rising temperature. Its 93 Ω Zener impedance (ZZ) ensures stable regulation under small-signal load variations.
The DO-35 hermetically sealed glass package supports operation up to +200°C junction temperature and features a cathode band marking. Derating begins above 50°C at 4.0 mW/°C, limiting usable power to 300 mW at 100°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal at IZ = 10 mA; min 40.85 V / max 45.15 V defines ±5% tolerance band for precision reference use. |
| Power Dissipation (PD) | 500 mW at TA = 25°C; derates linearly to zero at ~175°C ambient, requiring thermal design below 100°C for >300 mW operation. |
| Zener Impedance (ZZ) | 93 Ω at IZ = 10 mA; determines output voltage variation under load changes - e.g., ±0.93 V for ±10 mA current swing. |
| Reverse Leakage (IR) | ≤0.25 μA at VR = 33 V; ensures minimal parasitic current in high-impedance bias networks or standby circuits. |
| Temperature Coefficient | +0.095 %/°C; quantifies VZ drift - e.g., +0.4085 V change per 100°C rise, critical for temperature-stable references. |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA; confirms standard silicon PN junction behavior for bidirectional protection or polarity detection. |
Pinout & Package
DO-35 glass axial package: hermetically sealed, 2.0 mm diameter × 4.56 mm length, cathode indicated by color band on one end. Weight: 0.137 g. JEDEC DO-204AH compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown reference node | Connected to lower-potential side in reverse-bias configuration; used for forward-bias clamping or LED driver return path. |
| Cathode | Zener breakdown anode / voltage reference output | Marked with color band; supplies regulated 43 V when reverse-biased; must be held at higher potential than anode during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables use in applications requiring tighter regulation than generic Zeners (e.g., sensor excitation, ADC reference trimming). |
| +0.095 %/°C tempco | Supports predictable, monotonic VZ drift for compensated reference designs - unlike negative-tempco devices needing external correction. |
| DO-35 hermetic glass package | Provides long-term stability and moisture resistance vs. plastic packages, critical for industrial and automotive under-hood environments. |
| 500 mW power rating | Allows direct regulation of low-current analog rails (e.g., 1–5 mA) without heatsinking in compact PCB footprints. |
| 0.25 μA max reverse leakage @ 33 V | Minimizes error in high-impedance feedback networks - essential for precision op-amp reference dividers or battery-monitoring comparators. |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Voltage Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 43 V reference to op-amp gain stage, enabling ratiometric measurement against stable voltage source. Use Value: ±5% VZ tolerance and +0.095 %/°C tempco allow <±1% total drift over −40 to +85°C, meeting Class A industrial accuracy requirements. |
Use Scenario: Generating a stable reference for internal ADC or comparator in battery-powered IoT edge nodes operating at 3.3 V or 5 V logic. IC Role / Device Role / Timing Role: Shunt regulator establishing precise 43 V rail for external high-voltage monitoring circuitry interfacing with MCU GPIO or analog inputs. Use Value: 0.25 μA reverse leakage prevents loading of high-Z voltage dividers feeding MCU analog pins, preserving measurement resolution. |
| Overvoltage Protection Clamp | Legacy Power Supply Feedback Network |
Use Scenario: Protecting downstream 36 V-rated DC-DC converters from transient surges in 24 V industrial bus systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy when line voltage exceeds 43 V, triggered before MOSFET gate oxide failure. Use Value: 93 Ω Zener impedance limits clamping voltage overshoot to <45 V during 100 ns transients, satisfying IEC 61000-4-5 Level 3 immunity. |
Use Scenario: Setting output voltage in flyback or forward converter feedback loops using TL431-compatible optocoupler interfaces. IC Role / Device Role / Timing Role: Replacing obsolete 43 V Zener references in legacy AC/DC adapter schematics where TL431 isn't available or cost-prohibitive. Use Value: DO-35 footprint matches original design, eliminating PCB rework; 500 mW rating handles typical 1–2 mA feedback current without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A | 47 V nominal, ±5%, 1 W power rating, DO-41 package, 150 Ω ZZ at 13 mA | Higher voltage and power; larger DO-41 footprint requires layout change | Select when >500 mW dissipation or 47 V regulation is required; not drop-in due to package and VZ mismatch. |
| BZX55-C43 | 43 V nominal, ±5%, 500 mW, DO-35 package, 90 Ω ZZ at 5 mA, −0.05 %/°C tempco | Negative tempco improves stability in mixed-temperature zones; identical DO-35 fit | Preferred for temperature-compensated references; same footprint but different thermal drift behavior. |
Compared with 1N5260B_T50R, 1N4752A offers higher power and voltage but requires PCB redesign, while BZX55-C43 matches voltage and package but provides opposite temperature drift - enabling compensation strategies unavailable with the +0.095 %/°C characteristic of 1N5260B_T50R.
Availability
1N5260B_T50R is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-power microcontroller reference generation, overvoltage protection clamps, and legacy power supply feedback networks requiring stable component supply and long-lifecycle support.
Supply support for 1N5260B_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, analog, sensor, and connectivity solutions for automotive, industrial, cloud computing, and consumer markets.
The 1N52xxB series belongs to ON Semiconductor's general-purpose Zener diode product line, designed for precision voltage regulation and reference applications in cost-sensitive, space-constrained, and thermally demanding environments.
FAQ
What is the exact Zener voltage range for 1N5260B_T50R at 25°C?
The 1N5260B_T50R has a guaranteed Zener voltage range of 40.85 V to 45.15 V at IZ = 10 mA and TA = 25°C, corresponding to its ±5% tolerance specification. This range is confirmed in the ON Semiconductor 1N5221B–1N5263B datasheet Rev. 3, Table on page 2. The 1N5260B_T50R is tested and binned to meet this full spread.
Does 1N5260B_T50R have a specified forward voltage?
Yes, the 1N5260B_T50R specifies a maximum forward voltage of 1.2 V at IF = 200 mA, as stated in the "Electrical Characteristics" section of the ON Semiconductor datasheet. This value reflects standard silicon PN junction behavior and supports use in bidirectional protection or polarity-sensing roles alongside its primary Zener function.
Can 1N5260B_T50R be used in surface-mount designs?
No - the 1N5260B_T50R uses a DO-35 axial glass package intended for through-hole mounting only. It lacks solder pads or terminations compatible with reflow or wave soldering processes. For SMT equivalents, consider ON Semiconductor's NZ9F43V (SOD-123) or similar Zener families explicitly rated for surface-mount assembly.
What is the maximum allowable junction temperature for 1N5260B_T50R?
The 1N5260B_T50R has a specified operating junction temperature range of −65°C to +200°C, per the Absolute Maximum Ratings table in the ON Semiconductor datasheet. This wide range enables deployment in harsh environments such as automotive engine compartments or industrial motor drives, provided power dissipation remains within derated limits above 50°C.
Is the cathode of 1N5260B_T50R marked, and how is it identified?
Yes, the cathode of 1N5260B_T50R is marked with a distinct color band on the DO-35 glass body, as shown in the package diagram on page 4 of the ON Semiconductor datasheet. This band aligns with JEDEC DO-204AH standard marking conventions and must be oriented toward the higher-potential node in reverse-bias Zener operation.
1N5260B_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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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
1N5260B_T50R FAQ
1.How can I place an order for 1N5260B_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5260B_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 1N5260B_T50R reliable?
The price and inventory of 1N5260B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5260B_T50R is usually 5 days.
3.What payment methods are accepted for 1N5260B_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5260B_T50R transactions.
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4.How is shipping managed for 1N5260B_T50R?
1N5260B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5260B_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 1N5260B_T50R?
For technical support, including 1N5260B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5260B_T50R requirements.
6.How does Aetrix verify that 1N5260B_T50R is sourced from the original manufacturer or authorized distributors?
All 1N5260B_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 1N5260B_T50R meets industry standards.
7.What is the process for return or replacement of 1N5260B_T50R?
All 1N5260B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5260B_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 1N5260B_T50R part is unused and in its original packaging.
Return procedure for 1N5260B_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5260B_T50R Tags
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