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onsemi 1N4751A_T50R
- Part No.:
- 1N4751A_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751A_T50R.pdf
- Description:
- DIODE ZENER 30V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
1N4751A_T50R from ON Semiconductor is a 30 V, 1 W Zener diode in DO-41 glass package with ±5% tolerance, 8.5 Ω dynamic impedance at 30 mA test current, and 5 µA leakage current at 22.8 V reverse voltage. It provides precise voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4751A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility for through-hole PCB layouts.
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain stable DC voltage across its terminals under varying load and line conditions. Its 30 V nominal Zener voltage (min 28.5 V, max 31.5 V) is specified at 30 mA test current with 8.5 Ω impedance, ensuring low regulation error in feedback networks.
The device supports non-repetitive peak reverse surge currents up to 150 mA (8.3 ms square wave) and exhibits 0.25 mA knee current at 25.1 V, enabling reliable clamping in transient suppression applications while maintaining low leakage (5 µA) below rated voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal (28.5–31.5 V range); defines regulated output voltage in shunt regulator designs |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C; sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZ) | 8.5 Ω @ IZ = 30 mA; determines regulation stiffness-lower value means tighter voltage control under load variation |
| Leakage Current (IR) | 5 µA @ VR = 22.8 V; ensures minimal standby current draw in high-impedance bias networks |
| Operating Temperature | –65°C to +200°C; enables use in automotive under-hood, industrial motor drives, and aerospace environments |
| Knee Current (IZK) | 0.25 mA @ VZK = 25.1 V; specifies minimum current needed to enter useful regulation region |
| Surge Current (IZSM) | 150 mA (8.3 ms); defines single-event transient energy absorption capability without failure |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; leads are unmarked terminals requiring external polarity identification during PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt regulator | Connected to circuit ground or lowest potential point; carries full load current when regulating |
| Cathode | Reverse-biased Zener terminal / Regulated output node | Connected to input rail or voltage source; maintains fixed voltage relative to anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive consumer power supplies |
| DO-41 glass package | Provides hermetic sealing and thermal stability for long-term reliability in high-temperature environments |
| 1 W power rating with linear derating | Supports robust operation in 12–48 V industrial power rails with 6.67 mW/°C margin above 50°C ambient |
| Low 5 µA leakage at 76% VZ | Minimizes quiescent current in battery-backed systems and precision sensor biasing networks |
| 150 mA non-repetitive surge rating | Allows direct integration into input-stage transient protection without series resistors or TVS co-location |
Applications
| Industrial Power Supply Reference | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt reference element providing precise 30 V reference to optocoupler input or TL431 comparator. Use Value: Maintains ±1% output regulation across –40°C to +105°C ambient using 30 V Zener voltage and 8.5 Ω impedance. |
Use Scenario: Clamping 12 V battery rail transients in engine control unit power input stage. IC Role / Device Role / Timing Role: Overvoltage protector absorbing load-dump spikes up to 150 mA for 8.3 ms. Use Value: Prevents downstream LDO or MCU damage with 22.8 V reverse standoff and 150 mA surge rating. |
| Programmable Logic Controller I/O Protection | Test Equipment Calibration Reference |
Use Scenario: Protecting 24 V digital input channels against field-wiring induced surges. IC Role / Device Role / Timing Role: Passive clamp limiting channel voltage to 31.5 V maximum during fault events. Use Value: Ensures EN 61000-4-4 compliance with 0.25 mA knee current enabling fast turn-on below 25.1 V. |
Use Scenario: Providing traceable 30 V reference in benchtop multimeter calibration circuitry. IC Role / Device Role / Timing Role: Precision shunt voltage standard with ±5% initial tolerance and <100 ppm/°C TC. Use Value: Delivers stable 30 V reference with 5 µA leakage ensuring minimal loading on op-amp buffer stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A (ON Semiconductor) | Same electrical specs and DO-41 package; differs only in marking format (no "_T50R" suffix) | No functional difference; identical thermal, electrical, and mechanical behavior | Select 1N4751A_T50R when traceability to specific tape-and-reel packaging (T50R) is required for SMT-compatible reel handling. |
| BZX55C30 (Vishay) | 30 V ±5%, 500 mW rating, DO-35 package; lower power and smaller footprint than 1N4751A_T50R | Suitable for low-power signal-level regulation but not for 1 W continuous dissipation | Choose BZX55C30 only for space-constrained PCBs where 500 mW rating suffices and thermal mass is managed externally. |
Compared with 1N4751A_T50R, the base 1N4751A offers identical performance with standard packaging, while BZX55C30 trades 50% power capacity for miniaturization-making 1N4751A_T50R optimal for industrial 1 W reference and clamp roles requiring proven thermal robustness.
Availability
1N4751A_T50R is available at Aetrix Electronics and suitable for industrial power supply reference, automotive ECU voltage clamp, and programmable logic controller I/O protection requiring stable component supply and long-lifecycle support.
Supply support for 1N4751A_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, and cloud power applications.
The 1N47xxA series was designed specifically for general-purpose Zener regulation and voltage clamping in cost-sensitive, high-reliability through-hole applications-emphasizing wide temperature range, tight tolerance, and surge resilience.
FAQ
What is the Zener voltage tolerance of the 1N4751A_T50R?
The 1N4751A_T50R has a ±5% Zener voltage tolerance, meaning its nominal 30 V rating spans 28.5 V to 31.5 V at 30 mA test current and 25°C. This tolerance is guaranteed per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, and applies directly to the 1N4751A_T50R as a marked variant of the 1N4751A family.
Does the 1N4751A_T50R have the same power rating as the standard 1N4751A?
Yes, the 1N4751A_T50R maintains the full 1.0 W power dissipation rating at lead temperature ≤50°C, with identical 6.67 mW/°C derating above that threshold. The "_T50R" suffix denotes tape-and-reel packaging only-the silicon die, DO-41 package, and all electrical specifications match the base 1N4751A part.
What is the maximum reverse leakage current for the 1N4751A_T50R?
The 1N4751A_T50R exhibits a maximum reverse leakage current of 5 µA at 22.8 V (76% of nominal VZ), as specified in the ON Semiconductor 1N4728A–1N4758A datasheet. This value ensures minimal parasitic loading in high-impedance reference circuits and battery-powered monitoring systems.
Can the 1N4751A_T50R be used in surface-mount designs?
No-the 1N4751A_T50R uses a DO-41 glass axial package intended for through-hole mounting only. It lacks solder pads or gull-wing leads required for SMT assembly. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like MMSZ5248B, but note their lower power ratings and different thermal profiles compared to the 1N4751A_T50R.
What is the non-repetitive peak reverse current rating for the 1N4751A_T50R?
The 1N4751A_T50R supports a non-repetitive peak reverse current (IZSM) of 150 mA for an 8.3 ms square-wave pulse, per the ON Semiconductor datasheet. This rating enables the 1N4751A_T50R to absorb common automotive load-dump and inductive switching transients without degradation when properly heatsinked or pulsed within duty-cycle limits.
1N4751A_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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 22.8 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4751A_T50R FAQ
1.How can I place an order for 1N4751A_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751A_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 1N4751A_T50R reliable?
The price and inventory of 1N4751A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751A_T50R is usually 5 days.
3.What payment methods are accepted for 1N4751A_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751A_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751A_T50R?
1N4751A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751A_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 1N4751A_T50R?
For technical support, including 1N4751A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751A_T50R requirements.
6.How does Aetrix verify that 1N4751A_T50R is sourced from the original manufacturer or authorized distributors?
All 1N4751A_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 1N4751A_T50R meets industry standards.
7.What is the process for return or replacement of 1N4751A_T50R?
All 1N4751A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751A_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 1N4751A_T50R part is unused and in its original packaging.
Return procedure for 1N4751A_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751A_T50R 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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