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onsemi 1N4750A_T50R
- Part No.:
- 1N4750A_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4750A_T50R.pdf
- Description:
- DIODE ZENER 27V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,682
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Product details
Overview
1N4750A_T50R from onsemi is a 27 V ±5% Zener diode in DO-41 glass package, rated for 1.0 W power dissipation at TL ≤ 50°C with 6.67 mW/°C derating, 9.5 Ω max Zener impedance at 14 mA test current, and 0.25 μA max leakage current at 20.6 V reverse voltage. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the 1N4750A_T50R datasheet, pinout, applications, or equivalent options, key selection factors include its 27 V nominal Zener voltage, DO-41 through-hole package, 1.0 W thermal rating, 9.5 Ω dynamic impedance, and compliance with ON Semiconductor's 1N47xxA series specifications.
Technical Context
The 1N4750A_T50R operates as a silicon planar Zener diode optimized for stable voltage reference and overvoltage clamping. Its 27 V breakdown is specified at 14 mA test current (IZ), with 9.5 Ω dynamic impedance (ZZ) measured under those conditions and 35 Ω knee impedance (ZZK) at 0.25 mA (IZK).
It supports operation across –65°C to +200°C junction/storage temperature range, with 5% tolerance on VZ and 5 μA max leakage current at VR = 20.6 V. Non-repetitive peak reverse surge current is rated at 170 mA for 8.3 ms square wave pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65–28.35 V @ IZ = 14 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZ) | 9.5 Ω max @ IZ = 14 mA - indicates voltage regulation stability under load variation |
| Knee Impedance (ZZK) | 35 Ω max @ IZK = 0.25 mA - reflects regulation quality near turn-on threshold |
| Leakage Current (IR) | 0.25 μA max @ VR = 20.6 V - ensures minimal standby current in high-impedance bias networks |
| Operating Temp Range | –65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments |
| Surge Current (IZSM) | 170 mA non-repetitive @ 8.3 ms - supports transient overvoltage suppression without failure |
Pinout & Package
DO-41 glass axial package with cathode band marking; leads are unmarked anode/cathode terminals suitable for through-hole PCB mounting. Lead length = 3/8″ for thermal rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during Zener operation; carries reverse current when cathode is biased positive |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node to enable reverse-biased regulation at 27 V |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Ensures predictable regulation without post-production trimming in cost-sensitive designs |
| 1.0 W power rating | Supports robust voltage reference generation in analog sensor interfaces and power supply feedback loops |
| Low ZZ (9.5 Ω) | Maintains tight output voltage stability across varying load currents in precision references |
| DO-41 glass package | Provides reliable hermetic sealing and proven thermal performance for long-term field reliability |
| –65°C to +200°C operation | Enables deployment in extreme environments including engine control units and downhole instrumentation |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or forward converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode providing fixed reference voltage for optocoupler-based error amplification. Use Value: Delivers 27 V reference with <9.5 Ω impedance to minimize loop gain variation across line/load conditions. |
Use Scenario: Biasing and calibrating pressure or temperature sensors in engine management systems. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric ADC excitation in harsh ambient conditions. Use Value: Maintains ±5% accuracy from –40°C to +150°C, supporting AEC-Q200-compliant sensor signal chains. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Clamping transient spikes on 24 V DC bus lines in factory automation equipment. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus exceeds 27 V. Use Value: Absorbs 170 mA non-repetitive surges (8.3 ms) without degradation, meeting IEC 61000-4-5 Level 3. |
Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) in battery-powered devices. IC Role / Device Role / Timing Role: Stable 27 V reference input to comparator hysteresis network. Use Value: Low 0.25 μA leakage at 20.6 V ensures minimal quiescent current drain in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | Same electrical specs and DO-41 package; T50R suffix denotes tape-and-reel packaging variant | No functional difference; identical circuit behavior and thermal profile | Select 1N4750A_T50R for automated SMT placement; choose bulk 1N4750A for manual prototyping or low-volume assembly |
| BZX55C27 | 27 V ±5%, 500 mW rating, DO-35 package; higher ZZ (30 Ω) and narrower temp range (–65°C to +175°C) | Lower power handling limits use in >500 mW clamp/reference roles; smaller DO-35 footprint | Choose BZX55C27 only if board space is constrained and power demand stays below 0.5 W; otherwise 1N4750A_T50R offers superior thermal margin |
Compared with 1N4750A_T50R, the 1N4750A offers identical performance in bulk form but lacks tape-and-reel convenience, while BZX55C27 trades 1.0 W capability and extended temperature resilience for compactness-making 1N4750A_T50R optimal for high-reliability, thermally demanding applications.
Availability
1N4750A_T50R is available at Aetrix Electronics and suitable for industrial power supply feedback, automotive sensor reference, and overvoltage protection requiring stable component supply and full traceability.
Supply support for 1N4750A_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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power and sensing solutions for automotive, industrial, cloud, and medical markets.
The 1N47xxA series was designed specifically for general-purpose Zener regulation and voltage clamping in cost-sensitive, high-volume applications where reliability and specification consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4750A_T50R?
The 1N4750A_T50R has a Zener voltage tolerance of ±5%, meaning its breakdown voltage is guaranteed between 25.65 V and 28.35 V when tested at 14 mA. This tolerance is verified per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8 and applies to all units shipped as 1N4750A_T50R. The tolerance remains stable across its full operating temperature range.
Does the 1N4750A_T50R require heatsinking in standard operation?
No, the 1N4750A_T50R does not require external heatsinking when operated within its 1.0 W rating at lead temperature ≤ 50°C and with 3/8″ lead length. Its DO-41 glass package dissipates heat effectively through leads into the PCB. Derating begins at 6.67 mW/°C above 50°C, so heatsinking becomes relevant only in high-ambient or high-power-density layouts exceeding thermal limits.
How does the 1N4750A_T50R differ from the standard 1N4750A?
The 1N4750A_T50R is functionally identical to the 1N4750A in electrical and thermal specifications, differing only in packaging format: T50R denotes tape-and-reel delivery (500 units per reel) optimized for automated pick-and-place assembly. The underlying die, Zener characteristics, DO-41 package, and marking remain unchanged-ensuring full interchangeability in circuit design.
What is the maximum reverse leakage current for the 1N4750A_T50R?
The maximum reverse leakage current for the 1N4750A_T50R is 0.25 μA at VR = 20.6 V and Ta = 25°C, as specified in the ON Semiconductor 1N4728A–1N4758A datasheet. This low leakage supports high-impedance bias networks and minimizes standby power loss in battery-critical applications where the 1N4750A_T50R serves as a reference element.
Can the 1N4750A_T50R be used in automotive-grade designs?
Yes, the 1N4750A_T50R is suitable for automotive applications due to its –65°C to +200°C operating and storage temperature range, AEC-Q200 alignment via process qualification, and robust DO-41 glass construction. It is commonly deployed in engine control modules and body electronics for voltage reference and transient suppression-provided layout adheres to thermal derating guidelines per the 1N4750A_T50R datasheet.
1N4750A_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 20.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4750A_T50R FAQ
1.How can I place an order for 1N4750A_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4750A_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 1N4750A_T50R reliable?
The price and inventory of 1N4750A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4750A_T50R is usually 5 days.
3.What payment methods are accepted for 1N4750A_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4750A_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4750A_T50R?
1N4750A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4750A_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 1N4750A_T50R?
For technical support, including 1N4750A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4750A_T50R requirements.
6.How does Aetrix verify that 1N4750A_T50R is sourced from the original manufacturer or authorized distributors?
All 1N4750A_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 1N4750A_T50R meets industry standards.
7.What is the process for return or replacement of 1N4750A_T50R?
All 1N4750A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4750A_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 1N4750A_T50R part is unused and in its original packaging.
Return procedure for 1N4750A_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4750A_T50R Tags
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