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onsemi 1N4751A-T50A
- Part No.:
- 1N4751A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751A-T50A.pdf
- Description:
- DIODE ZENER 30V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,921
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Product details
Overview
1N4751A-T50A 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 feedback loops, overvoltage protection circuits, and reference voltage generation for analog signal conditioning.
For engineers reviewing the 1N4751A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating capability (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and peak non-repetitive reverse surge current (150 mA).
Technical Context
The 1N4751A-T50A operates as a silicon planar Zener diode optimized for stable voltage regulation under DC and low-frequency transient conditions. Its 30 V nominal Zener voltage is specified at 30 mA test current, with typical dynamic impedance of 8.5 Ω and maximum 12.5 Ω, ensuring predictable clamping behavior in shunt regulator topologies.
Designed for through-hole mounting in DO-41 packages, it features a cathode band marking, 1.0 W power dissipation at lead temperature ≤50°C, and thermal derating to zero at 200°C junction temperature - supporting reliable operation in industrial power supplies and automotive body electronics where ambient temperatures exceed 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal, min 28.5 V / max 31.5 V at IZ = 30 mA - defines regulated output voltage in shunt reference applications |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling before thermal shutdown |
| Zener Impedance (ZZ) | 8.5 Ω typical / 12.5 Ω max @ 30 mA - determines regulation stiffness and AC ripple rejection |
| Leakage Current (IR) | 5 µA max @ VR = 22.8 V - ensures minimal quiescent current in standby mode |
| Operating Temperature | –65°C to +200°C - enables use in under-hood automotive and high-temp industrial environments |
| Surge Current (IZSM) | 150 mA non-repetitive @ 8.3 ms - supports transient overvoltage suppression without failure |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band on the case. Leads are tinned copper-clad steel, suitable for wave or hand soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node in reverse-biased Zener configuration; carries full load current during regulation |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential node; establishes regulated voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without post-manufacturing trimming in cost-sensitive power supplies |
| 1.0 W power rating with linear derating | Supports robust 12–24 V rail stabilization in industrial PLC I/O modules without heatsinking |
| Low 5 µA leakage at 76% VZ | Minimizes standby power loss in battery-backed sensor nodes and energy-harvesting systems |
| DO-41 mechanical standardization | Ensures compatibility with legacy PCB footprints and automated insertion equipment |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing 30 V auxiliary rail in DIN-rail mounted AC/DC converters for factory automation. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback to TL431-based error amplifier. Use Value: Maintains ±1.5% output accuracy across –25°C to +70°C ambient with no active compensation required. | Use Scenario: Generating stable 30 V reference for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Precision voltage clamp protecting CAN/LIN interface ICs from load-dump transients. Use Value: Withstands 150 mA surge pulses per ISO 7637-2 Pulse 5a while holding voltage below 34.7 V. |
| Test Equipment Voltage Calibration | LED Driver Overvoltage Protection |
Use Scenario: Serving as traceable 30 V reference in handheld multimeter calibration fixtures. IC Role / Device Role / Timing Role: Primary voltage standard against which DMM ADC references are adjusted. Use Value: 8.5 Ω ZZ ensures <10 ppm/V line regulation error during calibration current sweeps. | Use Scenario: Clamping boost converter output in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Fail-safe shunt limiter preventing LED string overvoltage during open-circuit faults. Use Value: Activates at 31.5 V (max VZ) to divert >200 mA fault current, protecting driver MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A-TP (Micro Commercial) | Same 30 V VZ, ±5%, DO-41, but 1.5 W PD rating and 10 Ω ZZ max | Higher surge margin suits infrequent load-dump events; less precise regulation | Select when thermal headroom >50% is needed and tighter ZZ not critical |
| BZX55-C30 (Vishay) | 30 V VZ, ±5%, DO-35, 500 mW PD, 30 Ω ZZ max, 100 nA IR | Lower power and higher impedance limit use to low-current references only | Choose for space-constrained PCBs where 500 mW suffices and ultra-low leakage is prioritized |
Compared with 1N4751A-T50A, the 1N4751A-TP offers greater surge resilience at the cost of regulation precision, while BZX55-C30 trades power handling and impedance for smaller footprint and nanoamp leakage - making each suitable for distinct thermal, accuracy, and layout constraints.
Availability
1N4751A-T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4751A-T50A 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N47xxA series was designed specifically for general-purpose Zener regulation in cost-sensitive, high-reliability DC power systems - emphasizing wide temperature operation, mechanical robustness, and consistent parametric distribution.
FAQ
What is the exact Zener voltage tolerance for 1N4751A-T50A?
The 1N4751A-T50A has a guaranteed Zener voltage tolerance of ±5% around its nominal 30 V rating, meaning measured VZ falls between 28.5 V and 31.5 V when tested at 30 mA and 25°C. This tolerance is maintained across the full operating temperature range and is verified per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8.
Does 1N4751A-T50A support automotive-grade temperature requirements?
Yes, the 1N4751A-T50A is rated for junction temperatures from –65°C to +200°C, exceeding AEC-Q200 Grade 2 (–40°C to +105°C) and supporting under-hood applications such as engine control unit voltage references. Its DO-41 glass package and silicon construction ensure stability under thermal cycling and humidity exposure per MIL-STD-750 Test Method 1082.
How does thermal derating work for 1N4751A-T50A?
The 1N4751A-T50A dissipates 1.0 W up to 50°C lead temperature, then derates linearly at 6.67 mW/°C until reaching zero power at 200°C. For example, at 100°C lead temperature, allowable power drops to 667 mW. This derating curve is defined in the Absolute Maximum Ratings table and must be applied using measured lead temperature, not ambient.
Can 1N4751A-T50A replace 1N4751A in existing designs?
Yes, 1N4751A-T50A is a direct form-fit-function replacement for standard 1N4751A devices. The "-T50A" suffix denotes ON Semiconductor's tape-and-reel packaging variant with same electrical specs, DO-41 package dimensions, and cathode band marking - requiring no PCB or schematic changes when migrating from bulk or ammo-pack versions.
What is the peak non-repetitive reverse current rating for 1N4751A-T50A?
The 1N4751A-T50A supports a non-repetitive peak reverse current (IZSM) of 150 mA for an 8.3 ms pulse duration, as specified in Note 2 of the Electrical Characteristics table. This rating enables transient overvoltage suppression in 12 V and 24 V systems subjected to ISO 7637-2 Pulse 1 and Pulse 5a waveforms without degradation.
1N4751A-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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-T50A FAQ
1.How can I place an order for 1N4751A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751A-T50A 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-T50A reliable?
The price and inventory of 1N4751A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4751A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751A-T50A?
1N4751A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751A-T50A 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-T50A?
For technical support, including 1N4751A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751A-T50A requirements.
6.How does Aetrix verify that 1N4751A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4751A-T50A 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-T50A meets industry standards.
7.What is the process for return or replacement of 1N4751A-T50A?
All 1N4751A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751A-T50A, 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-T50A part is unused and in its original packaging.
Return procedure for 1N4751A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751A-T50A Tags
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