My Inquiry
My Account
onsemi MZP4737ARL
- Part No.:
- MZP4737ARL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
MZP4737ARL.pdf
- Description:
- DIODE ZENER 10V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MZP4737ARL from onsemi is a 3 W axial-leaded Zener diode with nominal zener voltage of 7.5 V (±5%), maximum zener impedance of 34 Ω at 4 mA test current, and reverse leakage current ≤0.5 μA at 5 V. It operates across −65°C to +200°C and delivers stable voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the MZP4737ARL datasheet, pinout, applications, or equivalent options, this device serves as a robust, high-surge-capable (98 W @ 1 ms) silicon-oxide passivated Zener regulator in DO−41 (Case 59) packaging - critical for industrial power rail stabilization and ESD-hardened feedback networks.
Technical Context
This device implements a silicon-oxide passivated PN junction in an axial-leaded plastic package (DO−41, Case 59), enabling stable reverse-biased breakdown operation with guaranteed limits on six electrical parameters including VZ, IR, ZZT, and surge capability. Its thermal design relies on lead-to-ambient conduction, with maximum steady-state power dissipation rated at 3 W at TL = 75°C (lead length = 3/8″).
The MZP4737ARL exhibits a temperature coefficient of approximately +2.5 mV/°C near its 7.5 V nominal zener voltage, confirmed by Figure 5 of the datasheet. It supports non-repetitive surge pulses up to 98 W for 1 ms per JEDEC standards, with cathode polarity marked by a band and soldering tolerance up to 230°C for 10 seconds at 1/16″ from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.13–7.88 V at IZT = 4 mA; ensures precise 7.5 V ±5% regulation under stable DC bias |
| Zener Impedance (ZZT) | 34 Ω max at IZT = 4 mA; maintains low dynamic resistance for tight output voltage control |
| Reverse Leakage (IR) | ≤0.5 μA at VR = 5 V; minimizes standby current in low-power reference paths |
| Surge Rating | 98 W @ 1 ms pulse; withstands transient overvoltage events without degradation |
| ESD Rating | Class 3 (>16 kV HBM); survives handling and board-level electrostatic discharge |
| Power Dissipation | 3 W at TL = 75°C (lead length = 3/8″); enables compact heatsinking via PCB traces or clips |
| Operating Temp Range | −65°C to +200°C; supports deployment in automotive engine compartments and industrial enclosures |
Pinout & Package
Package: DO−41 (Case 59), axial-leaded plastic, void-free thermosetting body with corrosion-resistant leads and cathode polarity band. Lead temperature limit: 230°C for 10 s at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in reverse-bias configuration | Connected to circuit ground or lower potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-side connection in reverse-bias configuration | Connected to regulated voltage rail; polarity band identifies this terminal physically |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables stable long-term VZ drift performance and high reliability in humid or contaminated environments |
| Surmetic 30 construction | Delivers 98 W non-repetitive surge capability - 3× higher than standard 1 W Zeners - without derating |
| Pb-free compatible packaging | Meets RoHS requirements while maintaining identical electrical and thermal specs as standard variants |
| Compact DO−41 footprint | Same physical size as conventional 1 W Zeners, enabling drop-in replacement in legacy designs |
| Guaranteed six-parameter limits | Ensures production consistency across VZ, ZZT, IR, IZK, ZZK, and surge current - critical for safety-critical references |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Precision 7.5 V reference in isolated DC-DC converter feedback loop with wide ambient temperature range. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias point for optocoupler-based error amplifier. Use Value: Low ZZT (34 Ω) and tight VZ tolerance (±5%) minimize output voltage drift across line/load/temperature. |
Use Scenario: Clamping transient spikes on 5 V logic rail caused by relay switching or inductive load kickback. IC Role / Device Role / Timing Role: Passive overvoltage clamp diverting surge current away from sensitive microcontroller I/O pins. Use Value: 98 W @ 1 ms surge rating absorbs energy without failure, exceeding IEC 61000-4-5 Level 3 requirements. |
| Automotive Body Control Module | ESD-Hardened Sensor Interface |
Use Scenario: Regulating auxiliary 7.5 V rail for LIN transceiver and window motor driver ICs in under-hood modules. IC Role / Device Role / Timing Role: Primary shunt regulator establishing stable local supply independent of battery fluctuations. Use Value: −65°C to +200°C operating range accommodates engine bay thermal extremes without parameter shift. |
Use Scenario: Protecting analog front-end inputs of pressure sensors exposed to human-body ESD events during assembly or service. IC Role / Device Role / Timing Role: First-line ESD suppression element placed directly at connector entry point. Use Value: Class 3 (>16 kV HBM) rating eliminates need for supplemental TVS devices in cost-sensitive sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4737A | Same nominal VZ (7.5 V), but 1 W power rating and higher ZZT (35 Ω); no guaranteed six-parameter limits | Limited to low-power references where surge immunity and long-term stability are not required | Select only if board space allows larger thermal margin and surge events are absent |
| BZX85C7V5 | 7.5 V Zener in DO-41, 1.3 W rating, ZZT = 10 Ω typical (not guaranteed), no Class 3 ESD rating | Suitable for consumer-grade signal-level clamping, not industrial or automotive power rails | Prefer for cost-sensitive, non-safety-critical applications with benign ESD environment |
Compared with MZP4737ARL, the 1N4737A lacks surge robustness and parameter guarantees, while BZX85C7V5 trades guaranteed specifications for lower impedance but forfeits ESD hardening and high-temperature operation - making MZP4737ARL the sole choice for mission-critical 3 W regulation with full environmental resilience.
Availability
MZP4737ARL is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and automotive body control module applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for MZP4737ARL 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, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MZP4737ARL belongs to the MZP47xxA Series - a family of 3 W Surmetic 30 Zener regulators engineered for high-reliability voltage reference and transient suppression in harsh thermal and electrical environments.
FAQ
What is the zener voltage tolerance for MZP4737ARL?
The MZP4737ARL has a standard zener voltage tolerance of ±5% around its nominal 7.5 V rating, meaning the actual measured VZ falls between 7.13 V and 7.88 V when tested at IZT = 4 mA and TL = 30°C. This tolerance is guaranteed across production lots and is explicitly defined in the "TOLERANCE AND TYPE NUMBER DESIGNATION" section of the datasheet.
Does MZP4737ARL support Pb-free assembly processes?
Yes, MZP4737ARL is available in Pb-free packaging and complies with RoHS Directive 2011/65/EU. The datasheet confirms that all electrical and thermal specifications apply identically to both standard and Pb-free versions, and the device supports standard reflow and wave soldering profiles with peak temperatures up to 230°C for 10 seconds at 1/16″ from the case.
What is the maximum non-repetitive surge power rating for MZP4737ARL?
The MZP4737ARL is rated for 98 W non-repetitive surge power at a pulse width of 1 ms, as specified in the "Specification Features" and verified in Figure 3 of the datasheet. This rating applies to a single rectangular or sine-wave-equivalent pulse and exceeds JEDEC-standard surge testing requirements for industrial-grade Zener diodes.
How is polarity identified on the MZP4737ARL package?
The MZP4737ARL uses a cathode band to indicate polarity - a visible marking band on the plastic body adjacent to the cathode lead. As shown in the "MARKING DIAGRAM" and "Mechanical Characteristics" sections, the cathode lead is oriented off-first when the band is up, and the anode is the unmarked lead. This matches standard DO−41 polarity conventions.
What thermal derating applies to MZP4737ARL at elevated ambient temperatures?
MZP4737ARL's steady-state power dissipation must be derated above 50°C ambient: it delivers 1 W at TA = 50°C, then decreases linearly at 6.67 mW/°C. At TA = 75°C, the rating drops to zero unless mounted with controlled lead temperature - where it sustains 3 W at TL = 75°C with 3/8″ lead length, derating at 24 mW/°C beyond that point.
MZP4737ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7.6 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
MZP4737ARL FAQ
1.How can I place an order for MZP4737ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for MZP4737ARL 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 MZP4737ARL reliable?
The price and inventory of MZP4737ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MZP4737ARL is usually 5 days.
3.What payment methods are accepted for MZP4737ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MZP4737ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MZP4737ARL?
MZP4737ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MZP4737ARL 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 MZP4737ARL?
For technical support, including MZP4737ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MZP4737ARL requirements.
6.How does Aetrix verify that MZP4737ARL is sourced from the original manufacturer or authorized distributors?
All MZP4737ARL 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 MZP4737ARL meets industry standards.
7.What is the process for return or replacement of MZP4737ARL?
All MZP4737ARL units undergo pre-shipment inspection (PSI). If there is an issue with MZP4737ARL, 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 MZP4737ARL part is unused and in its original packaging.
Return procedure for MZP4737ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MZP4737ARL 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…
