My Inquiry
My Account
onsemi 1N4732A-T50A
- Part No.:
- 1N4732A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4732A-T50A.pdf
- Description:
- DIODE ZENER 4.7V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,476
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4732A-T50A from ON Semiconductor is a 4.7 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, 53 Ω dynamic impedance at 20 mA test current, and 1 μA leakage current at 3.76 V reverse voltage. It provides precise voltage regulation in low-power reference and protection circuits.
For engineers reviewing the 1N4732A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal derating behavior, junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility in space-constrained PCB layouts.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage reference and overvoltage clamping. Its 4.7 V nominal breakdown voltage is specified at 20 mA test current (IZ), with typical Zener impedance of 53 Ω and knee impedance of 8 Ω at 0.25 mA (IZK).
The 1N4732A-T50A exhibits 1 μA maximum leakage current at VR = 3.76 V and supports non-repetitive peak reverse surge current up to 970 mA (8.3 ms square wave). It is designed for operation within –65°C to +200°C junction/storage temperature range and requires 3/8″ lead length for full 1.0 W rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V ±5% at IZ = 20 mA - defines regulated output voltage with tight tolerance for reference stability |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous power handling under standard lead-mount conditions |
| Zener Impedance (ZZ) | 53 Ω @ IZ = 20 mA - indicates AC voltage regulation quality; lower values improve ripple rejection |
| Leakage Current (IR) | 1 μA @ VR = 3.76 V - ensures minimal standby current in high-impedance bias networks |
| Junction Temp Range | –65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments |
| Package | DO-41 glass axial - standardized through-hole footprint with cathode band marking and 2.0 mm diameter body |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band on the case. Leads are unmarked; polarity is determined solely by band position. Standard lead length is 3/8″ for full power rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode bias reference | Connected to lower potential side in reverse-bias regulation; determines forward drop (~0.7 V) if used in forward mode |
| Cathode | Zener breakdown terminal / voltage reference node | Marked with color band; connected to higher potential side during regulation; defines 4.7 V reference point relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive designs |
| 1.0 W power rating with defined derating | Supports robust transient suppression and stable DC reference in 5–12 V rail monitoring |
| Low 1 μA leakage at 80% VZ | Minimizes error in high-resistance divider networks and battery-powered sensor references |
| DO-41 mechanical standardization | Ensures compatibility with legacy automated insertion equipment and hand-soldering workflows |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 4.7 V reference for linear regulator feedback or ADC reference divider. IC Role / Device Role / Timing Role: Voltage reference element establishing precision bias point for analog circuitry. Use Value: Tight ±5% VZ tolerance and low 53 Ω impedance ensure <±10 mV drift across load and temperature in low-current (<5 mA) applications. |
Use Scenario: Clamping transient spikes on 5 V logic rails or microcontroller I/O lines. IC Role / Device Role / Timing Role: Reverse-biased shunt protector diverting excess energy to ground during ESD or inductive kick events. Use Value: 970 mA non-repetitive peak surge rating allows absorption of common 8.3 ms transients without degradation. |
| Sensor Bias Network | Industrial Signal Conditioning |
Use Scenario: Generating stable excitation voltage for resistive sensors (e.g., RTDs, strain gauges) in 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Low-leakage voltage source maintaining accuracy in high-impedance bias paths. Use Value: 1 μA leakage at 3.76 V prevents measurable offset error in >1 MΩ sensor bridges. |
Use Scenario: Level-shifting and rail stabilization in PLC input modules operating from 24 V DC supplies. IC Role / Device Role / Timing Role: Zener-based local regulation for isolated analog front-end ICs requiring clean 4.7 V supply. Use Value: –65°C to +200°C operating range supports deployment in uncontrolled industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A-TP (Micro Commercial Co.) | Same 4.7 V ±5%, DO-41, but 500 mW rating and 60 Ω ZZ @ 20 mA | Limited to lower-power biasing; not suitable for 1 W clamping duty cycles | Select when board-level power dissipation is constrained and thermal margin is limited |
| BZX55C4V7 (Vishay) | Same 4.7 V ±5%, DO-35, 500 mW, 60 Ω ZZ @ 5 mA, 100 nA IR @ 3.8 V | Smaller DO-35 package; lower leakage enables ultra-low-power sensor references | Choose for miniaturized designs where DO-41 footprint is prohibitive and leakage <100 nA is critical |
Compared with 1N4732A-T50A, the 1N4732A-TP offers identical voltage spec but reduced power handling, while BZX55C4V7 trades package size and leakage performance for lower power rating-neither is pin-compatible due to differing DO-41 vs. DO-35 footprints.
Availability
1N4732A-T50A is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and sensor bias network applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from ON Semiconductor's qualified production line.
Supply support for 1N4732A-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 power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud power applications.
The 1N47xxA series was developed as a general-purpose Zener diode family targeting cost-effective, reliable voltage regulation and transient suppression in high-volume consumer and industrial electronics.
FAQ
What is the Zener voltage tolerance of the 1N4732A-T50A?
The 1N4732A-T50A has a nominal Zener voltage of 4.7 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 4.465 V and 4.935 V at 20 mA test current and 25°C ambient. This tolerance is guaranteed across the full operating temperature range and is verified per ON Semiconductor's production test flow.
Can the 1N4732A-T50A be used in surface-mount designs?
No-the 1N4732A-T50A is packaged exclusively in the DO-41 axial leaded glass case and is not compatible with SMT reflow or pick-and-place processes. For surface-mount equivalents, consider ON Semiconductor's NSZ series or Vishay's MM3Z4V7, which offer similar 4.7 V regulation in SOD-323 packages.
What is the maximum allowable junction temperature for the 1N4732A-T50A?
The 1N4732A-T50A has a maximum junction temperature (TJ) rating of +200°C and a minimum of –65°C. This wide range allows operation in harsh environments such as automotive engine compartments or industrial motor control cabinets, provided thermal design maintains TJ within limits using appropriate PCB copper area or heatsinking.
How does the 1N4732A-T50A perform under transient surge conditions?
The 1N4732A-T50A supports a non-repetitive peak reverse current (IZSM) of 970 mA for an 8.3 ms square wave pulse, enabling effective clamping of common ESD and inductive switching transients. Its 53 Ω dynamic impedance helps limit voltage overshoot during fast-rising events when properly decoupled.
Is the 1N4732A-T50A RoHS compliant and halogen-free?
Yes-the 1N4732A-T50A meets RoHS Directive 2011/65/EU requirements and is manufactured as a halogen-free device per ON Semiconductor's environmental compliance documentation. The DO-41 glass package contains no lead in solderable terminations and conforms to JEDEC J-STD-609A Class 1 moisture sensitivity level.
1N4732A-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4732A-T50A FAQ
1.How can I place an order for 1N4732A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4732A-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 1N4732A-T50A reliable?
The price and inventory of 1N4732A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4732A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4732A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4732A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4732A-T50A?
1N4732A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4732A-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 1N4732A-T50A?
For technical support, including 1N4732A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4732A-T50A requirements.
6.How does Aetrix verify that 1N4732A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4732A-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 1N4732A-T50A meets industry standards.
7.What is the process for return or replacement of 1N4732A-T50A?
All 1N4732A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4732A-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 1N4732A-T50A part is unused and in its original packaging.
Return procedure for 1N4732A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4732A-T50A Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
