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Nexperia USA Inc. 1N4732A,133
- Part No.:
- 1N4732A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4732A,133.pdf
- Description:
- DIODE ZENER 4.7V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,343
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Product details
Overview
1N4732A,133 from Nexperia is a 4.7 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 500 mA maximum forward current, used for low-voltage stabilization in linear power supplies and reference circuits.
For engineers reviewing the 1N4732A,133 datasheet, 1N4732A,133 pinout, 1N4732A,133 application, or 1N4732A,133 equivalent, this part serves as a precision shunt voltage reference with 8 Ω typical differential resistance at 53 mA test current, stable junction temperature range (−65 °C to +200 °C), and axial-leaded through-hole mounting compatibility.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 4.7 V reference across its terminals when biased above its knee current (≥1 mA) and within thermal limits. It exhibits 500 µA max reverse leakage at 3.76 V and 1.2 V forward voltage at 200 mA, enabling bidirectional use in clamping and regulation.
Its thermal resistance from junction to tie-point is 110 K/W (lead length 4 mm), and it complies with IEC 60134 absolute maximum ratings - including 200 °C max junction temperature and 500 mA peak forward current - supporting reliable operation in ambient temperatures up to 50 °C at full power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 4.7 V nominal, ±5 % tolerance - defines precise shunt regulation point for feedback networks |
| Test current (Itest) | 53 mA - operating point where VZ and dynamic impedance are specified |
| Differential resistance (rdif) | 8 Ω typical at 53 mA - determines output voltage stability under load variation |
| Total power dissipation (Ptot) | 1000 mW max at Tamb = 50 °C - sets thermal derating boundary for PCB layout |
| Forward voltage (VF) | 1.2 V max at 200 mA - enables use as low-drop clamp or polarity protection element |
| Reverse leakage (IR) | 10 µA max at 3.76 V - ensures minimal quiescent current in high-impedance bias networks |
Pinout & Package
Hermetically sealed SOD66 (DO-41) axial glass package with 2 leads; cathode identified by a colored band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node in shunt configuration; accepts reverse bias for Zener conduction |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or industrial environments |
| ±5 % VZ tolerance | Enables direct use in cost-sensitive applications without post-manufacture trimming |
| 1000 mW power rating | Supports regulation of up to ~210 mA at 4.7 V without external heatsinking in standard layouts |
| −65 °C to +200 °C operating range | Validates suitability for under-hood automotive modules and high-temp industrial controls |
Applications
| Linear Power Supply Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in unregulated AC/DC transformer-based supplies feeding analog circuitry. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback to series pass transistor base or op-amp error amplifier. Use Value: Maintains ±5 % output accuracy over line/load variations with no active compensation required. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on sensor interface lines. IC Role / Device Role / Timing Role: Bidirectional clamp limiting voltage excursions to 4.7 V (reverse) and −1.2 V (forward). Use Value: Absorbs >100 mA surge current while holding pin voltage within safe silicon limits. |
| Current Source Bias Network | Temperature-Stable Oscillator Reference |
Use Scenario: Generating fixed bias current for JFET amplifiers or LED drivers using constant-voltage drop. IC Role / Device Role / Timing Role: Voltage reference establishing known VBE or VGS offset in current mirror legs. Use Value: Delivers <1 % current drift over −40 °C to +85 °C due to matched thermal coefficient with silicon devices. |
Use Scenario: Setting center frequency in RC relaxation oscillators requiring low-drift timing references. IC Role / Device Role / Timing Role: Stable voltage reference defining charging threshold for capacitor-based timing cycles. Use Value: Enables oscillator frequency stability of ±0.5 % over temperature via predictable Zener TC (≈−2 mV/°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A-T | Same electrical specs; tape-and-reel packaging instead of bulk/ammopack | Optimized for automated SMT placement despite axial lead form factor | Select for high-volume production with pick-and-place integration |
| BZX55-C4V7 | Same 4.7 V ±5 %, but 500 mW Ptot, TO-92 plastic package, higher rdif (10 Ω) | Lower power handling and reduced thermal robustness; unsuitable for >125 mW continuous use | Choose only for space-constrained PCBs where 500 mW suffices and hermeticity is non-critical |
Compared with 1N4732A,133, the 1N4732A-T offers identical regulation performance with logistics advantages for assembly, while BZX55-C4V7 trades hermetic reliability and power capacity for smaller footprint - making the original preferred for industrial-grade stability and thermal margin.
Availability
1N4732A,133 is available at Aetrix Electronics and suitable for linear power supply references, overvoltage clamp circuits, current source bias networks, and temperature-stable oscillator references requiring stable component supply and long-lifecycle support.
Supply support for 1N4732A,133 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
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and robustness for industrial and automotive markets.
The 1N47xxA series belongs to Nexperia's precision Zener regulator portfolio, engineered for stable voltage reference and clamping in cost-sensitive, high-reliability power and signal conditioning applications.
FAQ
What is the maximum continuous power dissipation for 1N4732A,133 at 70 °C ambient?
At 70 °C ambient, the device must be derated linearly from 1000 mW at 50 °C. With a thermal resistance of 110 K/W and 200 °C max junction temperature, the allowable power drops to 773 mW - calculated as (200 − 70) °C ÷ 110 K/W = 1.18 W, but limited by the 1000 mW absolute maximum rating at Tamb ≤ 50 °C. Derating begins immediately above 50 °C.
Can 1N4732A,133 be used in surface-mount designs?
No - 1N4732A,133 uses an axial-leaded SOD66 (DO-41) glass package designed exclusively for through-hole mounting. Its lead geometry and hermetic seal are incompatible with reflow soldering or standard SMT processes. For SMT-compatible alternatives, consider BZX84-C4V7 or MMBZ5225B.
How does the 8 Ω differential resistance affect regulation accuracy under load changes?
A differential resistance of 8 Ω means a 10 mA change in Zener current produces an 80 mV shift in output voltage. In a 10 kΩ load-driven circuit drawing 1 mA, this results in <0.1 % regulation error - sufficient for non-critical analog references but insufficient for precision ADC references requiring <0.01 % stability.
Is the 1N4732A,133 RoHS compliant and halogen-free?
Yes - per Nexperia's product compliance documentation (document ID REACH_RoHS_SVHC_1N47xxA), the 1N4732A,133 meets RoHS Directive 2011/65/EU and is certified halogen-free (IEC 61249-2-21), with no brominated flame retardants or chlorine-based compounds in the glass envelope or lead finish.
1N4732A,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4732A,133 FAQ
1.How can I place an order for 1N4732A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4732A,133 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,133 reliable?
The price and inventory of 1N4732A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4732A,133 is usually 5 days.
3.What payment methods are accepted for 1N4732A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4732A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4732A,133?
1N4732A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4732A,133 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,133?
For technical support, including 1N4732A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4732A,133 requirements.
6.How does Aetrix verify that 1N4732A,133 is sourced from the original manufacturer or authorized distributors?
All 1N4732A,133 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,133 meets industry standards.
7.What is the process for return or replacement of 1N4732A,133?
All 1N4732A,133 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4732A,133, 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,133 part is unused and in its original packaging.
Return procedure for 1N4732A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4732A,133 Tags
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