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Nexperia USA Inc. 1N4733A,133
- Part No.:
- 1N4733A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733A,133.pdf
- Description:
- DIODE ZENER 5.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:11,805
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Product details
Overview
1N4733A,133 from Nexperia is a 5.1 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 49 mA test current, used for low-voltage stabilization in linear power supply feedback paths and reference voltage generation.
For engineers reviewing the 1N4733A,133 datasheet, 1N4733A,133 pinout, 1N4733A,133 application, or 1N4733A,133 equivalent, this part serves as a precision shunt reference with 7 Ω differential resistance, 10 µA reverse leakage at 1 V, and thermal stability up to +200 °C junction temperature - critical for analog sensing, voltage clamping, and overvoltage protection circuits.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 5.1 V reference across load variations, with nominal test current of 49 mA and differential resistance of 7 Ω ensuring tight regulation under dynamic conditions.
Its hermetically sealed SOD66 glass package provides reliable long-term stability and low leakage, while the 110 K/W junction-to-tie-point thermal resistance enables predictable thermal performance in ambient temperatures up to +50 °C with proper lead length management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal, ±5 % tolerance - defines precise clamping/reference level in feedback loops |
| Test Current (Itest) | 49 mA - operating point where VZ and rdif are specified; sets minimum bias requirement |
| Differential Resistance (rdif) | 7 Ω - low impedance in breakdown ensures minimal output voltage shift with load current changes |
| Reverse Leakage (IR) | 10 µA max at 1 V - guarantees negligible standby current in high-impedance reference nodes |
| Total Power Dissipation (Ptot) | 1000 mW - supports robust operation in discrete regulator stages without forced cooling |
| Junction Temperature Range | −65 °C to +200 °C - enables use in automotive under-hood and industrial environments |
Pinout & Package
Hermetically sealed SOD66 (DO-41) axial glass package with cathode indicated by a colored band; leads are tinned copper, suitable for through-hole mounting and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (non-banded end) | Anode | Connected to ground or lower potential; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage tolerance | ±5 % - ensures predictable reference accuracy without post-manufacture trimming |
| Low differential resistance | 7 Ω - minimizes output voltage deviation under varying load currents |
| Hermetic glass sealing | SOD66 package - prevents moisture ingress and long-term parameter drift in humid environments |
| High junction temperature rating | +200 °C - supports operation in thermally constrained PCB layouts and high-ambient applications |
Applications
| Linear Power Supply Feedback | Microcontroller Reference Voltage |
|---|---|
Use Scenario: Stabilizing output voltage in 78xx-style linear regulators via external feedback divider. IC Role / Device Role / Timing Role: Shunt reference providing precise 5.1 V setpoint for error amplifier comparison. Use Value: Enables ±1 % output regulation accuracy with standard resistor tolerances and eliminates need for integrated reference ICs. |
Use Scenario: Supplying stable reference to ADC input or internal bandgap comparator in MCU-based sensor nodes. IC Role / Device Role / Timing Role: Low-drift voltage source for analog measurement calibration and threshold detection. Use Value: Maintains <10 µA leakage at 1 V, preserving battery life in always-on monitoring systems. |
| Voltage Clamping Protection | Overvoltage Detection Circuit |
Use Scenario: Protecting I/O pins of logic devices against transient surges exceeding 5.5 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy to ground before damage occurs. Use Value: Responds within nanoseconds due to low junction capacitance and handles 890 mA non-repetitive peak current. |
Use Scenario: Triggering shutdown logic when input rail exceeds safe operating range in DC-DC converter supervision. IC Role / Device Role / Timing Role: Precision threshold detector enabling deterministic fault response at 5.1 V ±0.255 V. Use Value: Delivers repeatable trip point with <7 Ω dynamic impedance, reducing hysteresis design complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A-T | Same electrical specs; tape-and-reel packaging (not bulk), RoHS-compliant plating | Designed for automated SMT placement; requires compatible pick-and-place setup | Select when using high-volume assembly lines requiring reel-fed feeders |
| BZX55-C5V1 | 5.1 V ±5 %, but 500 mW Ptot, higher rdif (10 Ω), different DO-35 package | Limited to lower-power reference roles; not suitable for >500 mW dissipation scenarios | Choose only if board space constraints favor smaller DO-35 footprint and thermal load is ≤400 mW |
Compared with 1N4733A-T and BZX55-C5V1, the 1N4733A,133 offers full 1000 mW capability in a proven DO-41 form factor, making it optimal for legacy designs, manual prototyping, and applications demanding maximum power margin without package redesign.
Availability
1N4733A,133 is available at Aetrix Electronics and suitable for linear power supplies, microcontroller reference circuits, voltage clamping protection, and overvoltage detection requiring stable component supply and long-lifecycle support.
Supply support for 1N4733A,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 solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
The 1N47xxA series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for stable voltage reference and clamping in cost-sensitive, high-reliability analog subsystems.
FAQ
What is the maximum continuous reverse current the 1N4733A,133 can handle at 5.1 V?
The device is rated for a working current (IZ) of 49 mA at its nominal Zener voltage. While it can sustain brief pulses up to 890 mA (IZSM), continuous operation above 49 mA risks exceeding its 1000 mW power limit and thermal derating curve - sustained bias must remain within the 49 mA test condition for guaranteed regulation performance and reliability.
Can the 1N4733A,133 be used in surface-mount designs?
No - the 1N4733A,133 uses an axial-leaded SOD66 (DO-41) glass package designed exclusively for through-hole mounting. It lacks solder pads or terminations compatible with reflow or wave soldering of SMT footprints. For surface-mount equivalents, consider Nexperia's BZX84-C5V1 or MMBZ5222B in SOT-23.
How does the 7 Ω differential resistance affect regulation accuracy under load variation?
A 7 Ω rdif means that for every 10 mA change in Zener current, output voltage shifts by ~70 mV. In practical feedback networks with 1 mA–100 mA bias ranges, this contributes ≤±0.35 % additional error beyond the ±5 % VZ tolerance - acceptable for general-purpose regulation but insufficient for metrology-grade references.
Is the 1N4733A,133 suitable for automotive under-hood applications?
Yes - its −65 °C to +200 °C junction temperature range, hermetic glass seal, and stable Zener characteristics after thermal cycling meet requirements for engine control unit (ECU) auxiliary rails and sensor reference supplies, provided PCB layout maintains adequate thermal relief and voltage derating per AEC-Q200 guidelines.
1N4733A,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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 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
1N4733A,133 FAQ
1.How can I place an order for 1N4733A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733A,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 1N4733A,133 reliable?
The price and inventory of 1N4733A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733A,133 is usually 5 days.
3.What payment methods are accepted for 1N4733A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733A,133?
1N4733A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733A,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 1N4733A,133?
For technical support, including 1N4733A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733A,133 requirements.
6.How does Aetrix verify that 1N4733A,133 is sourced from the original manufacturer or authorized distributors?
All 1N4733A,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 1N4733A,133 meets industry standards.
7.What is the process for return or replacement of 1N4733A,133?
All 1N4733A,133 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733A,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 1N4733A,133 part is unused and in its original packaging.
Return procedure for 1N4733A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733A,133 Tags
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