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onsemi SZMM5Z33VT5G
- Part No.:
- SZMM5Z33VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z33VT5G.pdf
- Description:
- DIODE ZENER 33V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
SZMM5Z33VT5G from onsemi is a 33 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 80 Ω maximum Zener impedance at 5 mA test current and <0.05 μA reverse leakage at 26.4 V, used for precision voltage clamping and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z33VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (250 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 33 V regulation under controlled current conditions. Its design targets low-profile, high-reliability clamping in battery-powered systems where thermal management and board area are critical constraints.
The SOD-523 package enables surface-mount assembly with MSL 1 rating and 260 °C reflow compatibility. It features 100% matte tin lead finish, UL 94 V-0 epoxy molding, and automotive-grade process control via the SZ prefix and PPAP capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, 31–35 V range at IZT = 5 mA - defines precise clamping threshold for overvoltage events |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous energy handling before thermal derating begins |
| Zener Impedance (ZZT) | ≤80 Ω at IZT = 5 mA - ensures minimal voltage shift under dynamic load transients |
| Reverse Leakage (IR) | <0.05 μA at VR = 26.4 V - guarantees negligible standby current in battery-critical circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust electrostatic immunity without external protection |
| Temperature Coefficient | +23.2 mV/°C at IZT - quantifies voltage drift across operating temperature range |
| Capacitance | 70 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity |
Pinout & Package
SOD-523 package: 1.20 mm × 0.80 mm body, 0.60 mm height, void-free thermosetting plastic case with UL 94 V-0 rating, matte tin leads, and MSL 1 reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 | Anode | Connected to ground or lower-potential rail; completes conduction path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without compromising solderability or reliability |
| Low Profile (0.60 mm height) | Enables stacking under shields or placement in ultra-thin handheld enclosures |
| High ESD Robustness (>16 kV HBM) | Eliminates need for discrete ESD protection in front-end I/O and USB interface circuits |
| Stable Zener Voltage Tolerance (±5%) | Reduces margining overhead in precision voltage monitoring and ADC reference circuits |
Applications
| Smartphone Power Management | Automotive Body Control Module |
|---|---|
Use Scenario: Clamping transient spikes on 3.3 V or 5 V supply rails during hot-plug events or load dump. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing passive overvoltage protection for PMIC inputs and microcontroller I/Os. Use Value: Prevents latch-up or damage to downstream logic with sub-100 ns response and no active control required. | Use Scenario: Protecting LIN bus transceiver supply pins against load dump surges up to 40 V. IC Role / Device Role / Timing Role: Standalone voltage clamp placed directly at transceiver VCC input. Use Value: Maintains functional safety by limiting rail excursion to ≤35 V, within transceiver absolute maximum rating. |
| Wearable Sensor Node | Industrial IoT Gateway |
Use Scenario: Stabilizing reference voltage for analog sensor signal conditioning in coin-cell powered devices. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) Zener reference source for op-amp bias networks. Use Value: Extends battery life beyond 2 years while maintaining ±1% reference accuracy over temperature. | Use Scenario: Overvoltage protection on 24 V auxiliary power input of edge computing module. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage protection scheme upstream of DC-DC converter. Use Value: Absorbs 500 mW surge energy without degradation, enabling compact 2-layer PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C33LT1G | Same 33 V nominal, ±5% tolerance, but SOD-323 package (1.7 × 1.3 mm); 350 mW PD; 90 Ω ZZT | Larger footprint and lower power rating limit use in ultra-dense layouts or higher-energy transients | Select when legacy SOD-323 land pattern exists and thermal load is ≤350 mW |
| MMSZ5258ET1G | 33 V nominal, ±5%, SOD-123 package (3.7 × 1.6 mm); 500 mW PD; 30 Ω ZZT; no AEC-Q101 qualification | Higher Zener conductance improves regulation but lacks automotive process controls and PPAP support | Select for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with BZX584C33LT1G and MMSZ5258ET1G, SZMM5Z33VT5G uniquely combines AEC-Q101 qualification, SOD-523 miniaturization, and 500 mW power handling-making it optimal for next-gen automotive and portable electronics requiring both size and reliability assurance.
Availability
SZMM5Z33VT5G is available at Aetrix Electronics and suitable for smartphone power management, automotive body control modules, and wearable sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMM5Z33VT5G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM5Z33VT5G belongs to the MM5ZxxxT1G/SZMM5ZxxxT1G series-engineered specifically for space-constrained voltage regulation and ESD-hardened clamping in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z33VT5G?
SZMM5Z33VT5G has a standard tolerance of ±5%, meaning its reverse breakdown voltage is guaranteed between 31.0 V and 35.0 V at 5 mA test current and 25 °C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025), and applies across the full operating temperature range when derated per thermal characteristics.
Is SZMM5Z33VT5G qualified for automotive applications?
Yes, SZMM5Z33VT5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes automotive-grade process control, unique site qualification, and enhanced change management-making SZMM5Z33VT5G suitable for under-hood and cabin electronics where reliability and audit readiness are mandatory.
What is the maximum power dissipation of SZMM5Z33VT5G at 85 °C ambient?
At 85 °C ambient, SZMM5Z33VT5G's maximum power dissipation is 260 mW. This is calculated using the 4.0 mW/°C derating factor from the Maximum Ratings table: 500 mW − (85 − 25) × 4.0 mW = 260 mW. This value assumes mounting on an FR-4 board with a 1 cm² copper pad, per Note 1 in the datasheet.
Does SZMM5Z33VT5G have a polarity marking, and how is it identified?
Yes, SZMM5Z33VT5G uses Style 1 marking with a cathode band on Pin 1. As shown in the "MARKING DIAGRAM" and "MECHANICAL CASE OUTLINE" sections of the datasheet, the banded end corresponds to the cathode terminal, and the unmarked end is the anode. This polarity must be observed during PCB layout to ensure correct reverse-bias operation in Zener regulation mode.
What is the reverse leakage current specification for SZMM5Z33VT5G at 26.4 V?
The reverse leakage current for SZMM5Z33VT5G is specified as ≤0.05 μA at VR = 26.4 V (80% of nominal Zener voltage), per the Electrical Characteristics table on page 3 of the onsemi datasheet. This ultra-low leakage supports extended battery life in always-on sensor and real-time clock backup circuits.
SZMM5Z33VT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±6.06%
- Power - Max:
- 500 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z33VT5G FAQ
1.How can I place an order for SZMM5Z33VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z33VT5G 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 SZMM5Z33VT5G reliable?
The price and inventory of SZMM5Z33VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z33VT5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z33VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z33VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z33VT5G?
SZMM5Z33VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z33VT5G 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 SZMM5Z33VT5G?
For technical support, including SZMM5Z33VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z33VT5G requirements.
6.How does Aetrix verify that SZMM5Z33VT5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z33VT5G 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 SZMM5Z33VT5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z33VT5G?
All SZMM5Z33VT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z33VT5G, 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 SZMM5Z33VT5G part is unused and in its original packaging.
Return procedure for SZMM5Z33VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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