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onsemi MZP4729ARL
- Part No.:
- MZP4729ARL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
MZP4729ARL.pdf
- Description:
- DIODE ZENER 3.6V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:90,000
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Product details
Overview
MZP4729ARL from onsemi is a 3.6 V ±5% axial-lead Zener diode in DO−41 (Case 59) package, rated for 3 W steady-state power dissipation at TL = 75°C, with 98 W non-repetitive surge capability and 1 μA max reverse leakage at VR = 1 V. It serves as a precision voltage reference or overvoltage clamp in low-power linear regulators and protection circuits.
For engineers reviewing the MZP4729ARL datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, polarity marking convention, and direct alternatives for voltage regulation design-in.
Technical Context
The MZP4729ARL uses a silicon-oxide passivated junction to achieve stable Zener breakdown with low dynamic impedance (69 Ω max at IZT = 10 mA) and high ESD robustness (Class 3, >16 kV HBM). Its axial-leaded Surmetic 30 construction ensures environmental resilience and solderability under standard reflow or hand-soldering conditions.
Thermal performance is defined by lead-to-ambient resistance (θLA ≈ 30–40°C/W depending on mounting), with junction temperature rise calculated via ΔTJL = θJL × PD. The device operates across −65°C to +200°C and exhibits a negative temperature coefficient typical of low-voltage Zeners (~−2 mV/°C near 3.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal, ±5% tolerance (3.42–3.78 V); defines precise clamping threshold at 10 mA test current |
| Power Dissipation | 3 W max at TL = 75°C; derates linearly to 1 W at TA = 50°C - requires thermal management on PCB leads |
| Zener Impedance | 69 Ω max at IZT = 10 mA; determines regulation accuracy under load variation |
| Reverse Leakage | 1 μA max at VR = 1 V; ensures minimal standby current in bias networks |
| Surge Rating | 98 W @ 1 ms pulse; supports transient overvoltage suppression without failure |
| ESD Rating | Class 3 (>16 kV) per HBM; enables handling without special ESD controls in assembly |
| Operating Temp | −65°C to +200°C; suitable for under-hood automotive or industrial environments |
Pinout & Package
DO−41 (Case 59) axial-leaded plastic package with cathode indicated by a single black band. Leads are tinned and solderable; maximum soldering temperature is 230°C at 1/16″ from case for 10 seconds. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage clamp output | Connected to regulated rail; polarity band identifies this terminal for correct orientation on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables stable long-term Zener voltage drift <0.1%/1000 hrs and low noise operation |
| Surmetic 30 construction | Provides hermetic-grade moisture resistance and mechanical durability in humid or dusty environments |
| 3 W rating in DO−41 footprint | Delivers 3× the power of standard 1 W Zeners without increasing board space or changing layout |
| Class 3 ESD immunity | Eliminates need for external ESD protection during board handling and functional testing |
Applications
| Low-Voltage Reference Supply | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Providing stable 3.6 V bias for op-amp comparators or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Zener voltage reference element establishing fixed DC potential independent of supply variation. Use Value: Maintains reference accuracy within ±5% across temperature and aging, enabling sub-1% measurement repeatability. | Use Scenario: Protecting 3.3 V GPIO pins from ESD events or accidental 5 V misconnection in embedded control modules. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor operating in reverse breakdown during overvoltage. Use Value: Clamps excursions above 3.78 V before damage occurs, leveraging 98 W surge rating to absorb single-event pulses. |
| Linear Regulator Shunt Element | Power Supply Undervoltage Lockout Threshold |
Use Scenario: Acting as shunt regulator in low-current 3.6 V LDO pre-regulator stage for RF front-end ICs. IC Role / Device Role / Timing Role: Dynamic current sink that adjusts conduction to maintain constant output voltage. Use Value: Delivers 3 W continuous dissipation margin while maintaining <69 Ω dynamic impedance for ripple rejection. | Use Scenario: Setting precise brown-out detection threshold for microcontrollers powered from 5 V rails with variable load. IC Role / Device Role / Timing Role: Voltage threshold detector feeding comparator input to trigger system reset below safe operating level. Use Value: Enables accurate 3.42–3.78 V trip point with negligible temperature-induced hysteresis due to known TC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4729A | Same 3.6 V ±5%, DO−41 package, but rated for 1 W only; no Class 3 ESD rating | Limited to low-power biasing where surge immunity and thermal headroom are not required | Select when cost sensitivity outweighs surge robustness and thermal margin needs |
| BZX55C3V6 | 3.6 V ±5%, DO−35 package, 500 mW rating; higher ZZK (1000 Ω) and lower surge capability (40 W) | Suitable only for signal-level referencing, not power-shunt or clamping roles | Choose for space-constrained layouts where 3 W dissipation is unnecessary |
Compared with MZP4729ARL, the 1N4729A offers identical voltage spec but lacks surge and ESD robustness, while BZX55C3V6 trades power handling and thermal stability for smaller footprint - making MZP4729ARL optimal for ruggedized 3 W regulation where reliability under transients is critical.
Availability
MZP4729ARL is available at Aetrix Electronics and suitable for low-voltage reference supplies, overvoltage clamping circuits, and linear regulator shunt elements requiring stable component supply and traceable sourcing.
Supply support for MZP4729ARL 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MZP4729ARL belongs to the MZP47xxA Series of 3 W Zener regulators designed for high-reliability voltage reference and transient suppression in harsh-environment applications where thermal stability and surge immunity are essential.
FAQ
What is the Zener voltage tolerance of the MZP4729ARL?
The MZP4729ARL has a nominal Zener voltage of 3.6 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 3.42 V and 3.78 V when measured at IZT = 10 mA and TL = 30°C ±1°C. This tolerance is guaranteed across the full operating temperature range and applies to all units in the MZP4729ARL production lot.
How does the MZP4729ARL handle surge conditions?
The MZP4729ARL supports a non-repetitive peak surge power of 98 W for 1 ms duration, per JEDEC standards. This capability allows it to absorb transient overvoltages without degradation, provided pulses are isolated and do not exceed the specified waveform (1/2 sine or equivalent). Its Surmetic 30 construction enhances thermal response during such events.
Is the MZP4729ARL RoHS-compliant and Pb-free?
Yes, the MZP4729ARL is available in Pb-free packaging, and all specifications apply identically to both standard and Pb-free versions. onsemi confirms compliance with RoHS Directive 2011/65/EU, and Pb-free orderable part numbers are published on their official website at www.onsemi.com.
What is the maximum allowable lead temperature during soldering for the MZP4729ARL?
The MZP4729ARL permits a maximum lead temperature of 230°C at a distance of 1/16″ from the case for up to 10 seconds during soldering. This specification ensures bond integrity and avoids thermal damage to the internal junction while remaining compatible with standard wave and reflow profiles.
How is polarity identified on the MZP4729ARL package?
Polarity on the MZP4729ARL is indicated by a single black cathode band located near one end of the DO−41 axial package. When mounted with the band facing upward, the cathode lead exits first; when the band faces downward, the cathode lead exits last - consistent with industry-standard DO−41 orientation conventions.
MZP4729ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
MZP4729ARL FAQ
1.How can I place an order for MZP4729ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for MZP4729ARL 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 MZP4729ARL reliable?
The price and inventory of MZP4729ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MZP4729ARL is usually 5 days.
3.What payment methods are accepted for MZP4729ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MZP4729ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MZP4729ARL?
MZP4729ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MZP4729ARL 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 MZP4729ARL?
For technical support, including MZP4729ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MZP4729ARL requirements.
6.How does Aetrix verify that MZP4729ARL is sourced from the original manufacturer or authorized distributors?
All MZP4729ARL 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 MZP4729ARL meets industry standards.
7.What is the process for return or replacement of MZP4729ARL?
All MZP4729ARL units undergo pre-shipment inspection (PSI). If there is an issue with MZP4729ARL, 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 MZP4729ARL part is unused and in its original packaging.
Return procedure for MZP4729ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MZP4729ARL Tags
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