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onsemi MM5Z33VT1
- Part No.:
- MM5Z33VT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z33VT1.pdf
- Description:
- DIODE ZENER 33V 100MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
MM5Z33VT1 from onsemi is a 33 V, 100 mW Zener diode in SOD−523 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 33 V at 2 mA test current, with ±6% tolerance (31–35 V), 80 Ω dynamic impedance at IZT, and <0.05 µA leakage at 23.2 V reverse bias.
For engineers reviewing the MM5Z33VT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its low-profile 1.20 mm × 0.80 mm footprint, Class 3 ESD rating (>16 kV HBM), −65 °C to +150 °C operating range, and suitability for portable power rail clamping and reference stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and supply fluctuations. Its 2 mA Zener test current and 80 Ω impedance at IZT ensure predictable regulation under light-load conditions typical in bias networks and feedback paths.
The device exhibits a positive temperature coefficient of +27.4 mV/°C and maximum capacitance of 70 pF at 0 V, making it suitable for DC and low-frequency stabilization-not RF bypassing. Its 0.7 mm body height and matte Sn lead finish support automated reflow assembly per MSL 1 and 260 °C peak profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal (31–35 V min/max) at 2 mA - defines clamping threshold for 3.3 V–5 V system rails. |
| Power Rating (PD) | 100 mW at TA = 25 °C - limits continuous dissipation; derates linearly above 25 °C ambient. |
| Zener Impedance (ZZT) | 80 Ω at IZT = 2 mA - determines regulation stiffness; lower values improve line/load regulation. |
| Leakage Current (IR) | <0.05 µA at VR = 23.2 V - ensures minimal standby current in battery-powered sensing nodes. |
| Capacitance (C) | 70 pF at VR = 0 V, f = 1 MHz - acceptable for DC/low-speed references; not for high-frequency filtering. |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld interfaces without external ESD protection. |
| Package | SOD−523 (Case 502) - 1.20 mm × 0.80 mm × 0.70 mm footprint ideal for ultra-dense PCB layouts. |
Pinout & Package
SOD−523 surface-mount package with cathode marked by polarity band; anode and cathode terminals occupy opposing ends of the rectangular body. Mounting position is unrestricted; qualified for 260 °C reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher-potential node; reverse-biased to conduct and clamp voltage at VZ. |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common or regulated rail return; completes Zener conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOD−523 footprint | 1.20 mm × 0.80 mm area saves >60% board space vs. SOD-123; enables placement adjacent to IC pins. |
| Low-profile 0.7 mm height | Enables stacking under shields or in thin-profile enclosures; compatible with automated optical inspection (AOI). |
| High ESD robustness | Class 3 (>16 kV HBM) eliminates need for discrete TVS in many consumer interface lines. |
| Precision Zener voltage tolerance | ±6% (31–35 V) supports accurate 3.3 V LDO feedback or 5 V rail monitoring without trimming. |
| Stable temperature coefficient | +27.4 mV/°C enables predictable drift compensation in temperature-critical references. |
Applications
| Smartphone Power Management | USB-C Port Protection |
|---|---|
|
Use Scenario: Clamping transient surges on PMIC input rails during hot-plug events in compact mobile designs. IC Role / Device Role / Timing Role: Voltage clamp protecting buck converter inputs from >30 V spikes. Use Value: Prevents PMIC latch-up using only 1.2 mm² area-no additional TVS required due to Class 3 ESD rating. |
Use Scenario: Overvoltage protection on CC logic lines and VCONN supply in USB-C receptacles. IC Role / Device Role / Timing Role: Precision shunt regulator limiting CC line voltage to safe 3.3 V logic levels. Use Value: 33 V Zener threshold avoids false triggering during normal 5 V VBUS operation while clamping fault transients. |
| Industrial Sensor Signal Conditioning | IoT Node Battery Monitoring |
|
Use Scenario: Providing stable 33 V reference for analog front-end gain calibration in 4–20 mA transmitters. IC Role / Device Role / Timing Role: Shunt reference source for op-amp bias networks and ADC reference dividers. Use Value: 80 Ω ZZT ensures <10 mV error across 10–100 µA load current variation in sensor excitation circuits. |
Use Scenario: Monitoring Li-ion cell stack voltage in 8S BMS modules where 33 V represents full-charge threshold. IC Role / Device Role / Timing Role: Threshold detector enabling charge termination via microcontroller GPIO interrupt. Use Value: Sub-0.05 µA leakage preserves battery shelf life >10 years in always-on monitoring applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C33 | Same 33 V nominal, but SOD-323 package (1.7 mm × 1.3 mm); 200 mW rating; 90 Ω ZZT. | Larger footprint and higher power suit industrial boards with thermal margin; less space-efficient than MM5Z33VT1. | Select when higher surge energy handling is needed and PCB area permits larger package. |
| MMSZ5256ET1G | 33 V nominal in SOD-123; 500 mW rating; 35 Ω ZZT; 1000 pF capacitance. | Higher power and lower impedance benefit high-current references, but 10× higher capacitance limits speed. | Prefer for high-stability analog references where size is secondary and low ZZT outweighs capacitance penalty. |
Compared with BZX584-C33 and MMSZ5256ET1G, the MM5Z33VT1 offers the smallest PCB footprint and lowest leakage for battery-sensitive, space-constrained applications-while trading off absolute power handling and ultra-low impedance for miniaturization.
Availability
MM5Z33VT1 is available at Aetrix Electronics and suitable for smartphone power management, USB-C port protection, and industrial sensor signal conditioning requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MM5Z33VT1 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MM5Z33VT1 belongs to the MM5Z2V4T1 series of miniature Zener regulators, engineered specifically for voltage clamping and reference generation in ultra-compact portable and wearable electronics.
FAQ
What is the Zener voltage tolerance of MM5Z33VT1?
The MM5Z33VT1 has a specified Zener voltage range of 31 V to 35 V at 2 mA test current, representing ±6% tolerance around the nominal 33 V value. This tolerance is verified per the onsemi datasheet revision 2 (July 2004) and applies under standard 25 °C ambient conditions. The MM5Z33VT1 maintains this specification across its qualified temperature range of −65 °C to +150 °C, with voltage drift compensated by its +27.4 mV/°C temperature coefficient.
Can MM5Z33VT1 be used in place of a 3.3 V Zener diode?
No, the MM5Z33VT1 is a 33 V Zener diode-not a 3.3 V device-and must not be substituted for 3.3 V regulation. Its minimum rated Zener voltage is 31 V, far exceeding typical 3.3 V logic or supply rails. Using MM5Z33VT1 in a 3.3 V circuit would prevent breakdown conduction entirely. For 3.3 V applications, consider MM5Z3V3T1 or equivalent 3.3 V Zener variants from the same series.
What is the maximum reverse leakage current for MM5Z33VT1?
The MM5Z33VT1 exhibits a maximum reverse leakage current of 0.05 µA at a reverse voltage of 23.2 V, as specified in the onsemi electrical characteristics table. This ultra-low leakage supports multi-year battery life in always-on IoT sensors and portable devices. Leakage remains well below 1 µA up to 30 V reverse bias, confirming suitability for precision biasing where quiescent current is critical.
Is MM5Z33VT1 RoHS compliant and lead-free?
Yes, the MM5Z33VT1 features 100% matte tin (Sn) lead finish and complies with RoHS Directive 2011/65/EU. Its thermosetting plastic epoxy meets UL 94 V−0 flammability rating, and the device is qualified for lead-free reflow soldering up to 260 °C peak temperature per JEDEC J-STD-020. The MM5Z33VT1 is MSL 1 rated, requiring no dry-pack storage prior to assembly.
Does MM5Z33VT1 support automated optical inspection (AOI)?
Yes, the MM5Z33VT1's SOD−523 package includes a visible cathode marking band and consistent 1.20 mm × 0.80 mm body dimensions, enabling reliable detection by standard AOI systems. Its 0.7 mm uniform height and matte Sn finish provide high contrast against solder paste and PCB silkscreen, supporting 100% post-reflow verification in high-volume manufacturing lines using the MM5Z33VT1.
MM5Z33VT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6%
- Power - Max:
- 100 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z33VT1 FAQ
1.How can I place an order for MM5Z33VT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z33VT1 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 MM5Z33VT1 reliable?
The price and inventory of MM5Z33VT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z33VT1 is usually 5 days.
3.What payment methods are accepted for MM5Z33VT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z33VT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z33VT1?
MM5Z33VT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z33VT1 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 MM5Z33VT1?
For technical support, including MM5Z33VT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z33VT1 requirements.
6.How does Aetrix verify that MM5Z33VT1 is sourced from the original manufacturer or authorized distributors?
All MM5Z33VT1 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 MM5Z33VT1 meets industry standards.
7.What is the process for return or replacement of MM5Z33VT1?
All MM5Z33VT1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z33VT1, 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 MM5Z33VT1 part is unused and in its original packaging.
Return procedure for MM5Z33VT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM5Z33VT1 Tags
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