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onsemi MZP4744ARLG
- Part No.:
- MZP4744ARLG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
MZP4744ARLG.pdf
- Description:
- DIODE ZENER 15V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,764
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Product details
Overview
MZP4744ARLG from onsemi is a 3 W axial-lead Zener diode with nominal zener voltage of 15 V (±5%), maximum zener impedance of 17 Ω at 14 mA test current, and surge rating of 98 W for 1 ms. It operates across −65 °C to +200 °C and delivers stable voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the MZP4744ARLG datasheet, pinout, applications, or equivalent options, this part serves as a high-surge-capable, DO−41 packaged Zener regulator suitable for industrial power rails, automotive subsystems, and embedded voltage clamping where ESD robustness (>16 kV HBM) and thermal stability are critical.
Technical Context
This device belongs to the MZP47xxA series of silicon-oxide passivated Zener regulators housed in a void-free, transfer-molded plastic DO−41 package (Case 59). Its junction construction enables low leakage (≤0.25 μA at 11.4 V), tight voltage tolerance (±5%), and guaranteed limits on six electrical parameters including VZ, IZT, ZZT, ZZK, IR, and VR.
The MZP4744ARLG is rated for 3 W steady-state dissipation at 75 °C lead temperature with 24 mW/°C derating above that point, and supports non-repetitive 98 W surge pulses per JEDEC standards. Its cathode band polarity marking and axial-leaded form factor enable through-hole mounting in space-constrained PCB layouts without thermal pad requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.25–15.75 V @ 14 mA - defines regulated output range for precision clamping or reference use |
| Zener Impedance (ZZT) | 17 Ω max @ IZT = 14 mA - ensures minimal voltage deviation under load transients |
| Surge Power Rating | 98 W @ 1 ms - withstands short-duration line surges without degradation |
| ESD Rating | Class 3 (>16 kV) HBM - survives handling and board-level electrostatic discharge events |
| Max Steady-State Power | 3 W @ TL = 75 °C - supports continuous operation in ambient temperatures up to 50 °C with standard lead length |
| Operating Temperature | −65 °C to +200 °C - qualified for under-hood automotive, industrial control, and high-temp environments |
| Leakage Current | ≤0.25 μA @ 11.4 V - maintains low quiescent current in standby or battery-backed circuits |
Pinout & Package
Package: DO−41 (Case 59), axial-leaded plastic, cathode indicated by band. Lead length 3/8″ standard; max soldering temperature 230 °C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reverse-bias reference node | Connected to lower-potential rail; forms reference path when cathode is biased above anode |
| Cathode | Zener breakdown terminal / regulated output node | Marked with polarity band; supplies stable voltage when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Surge-rated construction | 98 W non-repetitive pulse capability enables robust overvoltage protection without external TVS stacking |
| Silicon-oxide passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and time |
| ±5% VZ tolerance | Reduces need for post-assembly trimming in voltage reference designs |
| Pb-free compliant packaging | Meets RoHS and ELV directives without performance trade-offs in thermal or electrical behavior |
| DO−41 footprint compatibility | Direct replacement for legacy 1 W Zeners in existing through-hole layouts with no PCB redesign |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener reference element providing precise 15 V threshold to TL431 or similar shunt regulator IC. Use Value: Tight ±5% VZ tolerance and low ZZT minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Protecting microcontroller I/O pins or analog front-end inputs against transient overvoltage events exceeding 12 V. IC Role / Device Role / Timing Role: Passive clamping device limiting voltage to ≤15.75 V during ESD or inductive kick events. Use Value: 98 W surge rating absorbs single-event energy without failure, eliminating need for additional TVS stages. |
| Voltage Reference Source | Automotive Subsystem Protection |
|
Use Scenario: Generating stable 15 V reference for ADC biasing, sensor excitation, or DAC output scaling in industrial data acquisition modules. IC Role / Device Role / Timing Role: Precision DC reference node with low temperature coefficient and <0.25 μA leakage at 11.4 V. Use Value: Enables sub-0.1% full-scale accuracy in 12-bit+ measurement systems without active compensation. |
Use Scenario: Clamping LIN bus or 12 V power rail transients in body control modules exposed to load dump or jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage suppression element placed directly at connector entry points. Use Value: −65 °C to +200 °C operating range ensures functionality in engine bay or under-dash locations without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | Same nominal VZ (15 V), but rated for 1 W only; ZZT = 16 Ω @ 14 mA; no specified surge rating | Limited to low-power reference or signal-level clamping; unsuitable for 3 W continuous or 98 W surge scenarios | Select MZP4744ARLG when >1 W steady-state dissipation or JEDEC-compliant surge immunity is required. |
| BZX85C15 | 1.3 W rating; VZ = 15 V ±5%; ZZT = 20 Ω @ 5 mA; ESD rated to 8 kV HBM only | Designed for general-purpose PCB-level protection; lacks thermal margin for high-ambient deployments | Choose MZP4744ARLG for automotive-grade reliability, extended temperature range, and higher surge endurance. |
Compared with 1N4744A and BZX85C15, the MZP4744ARLG provides triple the power rating, verified 98 W surge capability, and full −65 °C to +200 °C qualification-making it the only option among the three suitable for under-hood automotive or industrial power rail stabilization.
Availability
MZP4744ARLG is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and embedded voltage reference designs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MZP4744ARLG 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MZP4744ARLG belongs to the Surmetic 30 Zener regulator family, engineered for high-reliability voltage reference and clamping in harsh-environment applications demanding robust surge immunity and wide temperature operation.
FAQ
What is the exact zener voltage tolerance for MZP4744ARLG?
The MZP4744ARLG has a guaranteed zener voltage tolerance of ±5% around its nominal value of 15 V, resulting in a specified range of 14.25 V to 15.75 V at 14 mA test current (IZT). This tolerance is standardized across the MZP47xxA series and confirmed in the Electrical Characteristics table of the official onsemi datasheet Rev. 3.
Does MZP4744ARLG support Pb-free assembly processes?
Yes, MZP4744ARLG is available in Pb-free packaging and complies with RoHS and ELV directives. The device uses lead-free terminations and thermosetting plastic encapsulation, and all specifications-including thermal derating, surge rating, and electrical parameters-apply identically to both standard and Pb-free versions per onsemi documentation.
What is the maximum non-repetitive surge power rating for MZP4744ARLG?
The MZP4744ARLG is rated for 98 W non-repetitive surge power at 1 ms pulse width, per JEDEC standards. This rating is validated in Figure 3 of the official datasheet and reflects the device's ability to absorb transient energy without degradation-distinct from its 3 W steady-state power limit.
How is polarity identified on the MZP4744ARLG package?
Polarity on the MZP4744ARLG is indicated by a cathode band marked on the plastic body. When installed, the banded end is the cathode terminal and must be connected to the higher-potential side of the circuit to achieve reverse-bias zener operation. The anode lead is unmarked and connects to the lower-potential rail.
What thermal derating applies to MZP4744ARLG above 75°C lead temperature?
MZP4744ARLG must be derated at 24 mW/°C above a lead temperature (TL) of 75°C. At TL = 100°C, its maximum steady-state power dissipation drops to 2.4 W. Derating assumes 3/8″ lead length; shorter leads increase thermal resistance and require further reduction per Figure 1 in the datasheet.
MZP4744ARLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 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
MZP4744ARLG FAQ
1.How can I place an order for MZP4744ARLG through Aetrix?
Please submit a Request for Quotation (RFQ) for MZP4744ARLG 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 MZP4744ARLG reliable?
The price and inventory of MZP4744ARLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MZP4744ARLG is usually 5 days.
3.What payment methods are accepted for MZP4744ARLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MZP4744ARLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MZP4744ARLG?
MZP4744ARLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MZP4744ARLG 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 MZP4744ARLG?
For technical support, including MZP4744ARLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MZP4744ARLG requirements.
6.How does Aetrix verify that MZP4744ARLG is sourced from the original manufacturer or authorized distributors?
All MZP4744ARLG 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 MZP4744ARLG meets industry standards.
7.What is the process for return or replacement of MZP4744ARLG?
All MZP4744ARLG units undergo pre-shipment inspection (PSI). If there is an issue with MZP4744ARLG, 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 MZP4744ARLG part is unused and in its original packaging.
Return procedure for MZP4744ARLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MZP4744ARLG Tags
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