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onsemi SZMMBZ5232BLT3
- Part No.:
- SZMMBZ5232BLT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5232BLT3.pdf
- Description:
- DIODE ZENER 5.6V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:110,000
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Product details
Overview
SZMMBZ5232BLT3 from onsemi is a 5.6 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board and featuring 11 Ω dynamic impedance at 20 mA test current. It provides precision voltage regulation in space-constrained applications such as portable battery monitors, USB port overvoltage protection, and low-power microcontroller reset circuits.
For engineers reviewing the SZMMBZ5232BLT3 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification status, and Pb-free packaging compliance.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, where terminal 2 is unconnected. Its regulation performance is specified at 25°C ambient with 20 mA Zener test current (IZT) and validated across −65°C to +150°C junction temperature range.
The SZMMBZ5232BLT3 exhibits a nominal temperature coefficient near 0 mV/°C (per typical curve for ~5.6 V devices), enabling stable reference behavior over temperature. Its 0.25 μA leakage current at 3 V reverse bias supports low-quiescent-current designs in always-on monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V at 20 mA - ensures ±5% regulation window for 5.6 V nominal reference |
| Power Dissipation (PD) | 225 mW on FR-5 board - defines maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 11 Ω at IZT = 20 mA - determines output voltage stability under load transients |
| Leakage Current (IR) | 0.25 μA at VR = 3 V - enables use in ultra-low-power standby circuits |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated assembly and end-use environments |
| Junction Temp Range | −65°C to +150°C - qualifies for automotive under-hood and industrial control applications |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronics per stress-test standard |
Pinout & Package
SOT-23 surface-mount plastic package (Case 318, Style 8), void-free thermosetting construction with corrosion-resistant finish; polarity band indicates cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; forward-biased during conduction |
| 2 | No Connection | Internally unconnected; must remain floating in PCB layout |
| 3 | Cathode | Connected to higher-potential node; Zener breakdown occurs between pins 1 and 3 |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Packaging | SZ prefix and "G" suffix indicate RoHS-compliant, lead-free termination suitable for modern reflow processes |
| Automated Assembly Optimized | Small SOT-23 footprint (2.9 mm × 1.3 mm) enables high-density placement on compact PCBs |
| High ESD Robustness | Class 3 Human Body Model rating (>16 kV) reduces risk of field failure in handheld and portable systems |
| Automotive Qualification | AEC-Q101 qualification confirms suitability for automotive infotainment, body control, and sensor interface modules |
| Thermal Performance | 556 °C/W junction-to-ambient thermal resistance allows predictable thermal design on standard FR-5 substrates |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearables to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Zener reference providing stable 5.6 V threshold for comparator input. Use Value: Tight ±5% VZ tolerance ensures consistent trip point across production units and temperature. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Shunt regulator diverting excess energy to ground when VBUS exceeds 5.88 V. Use Value: 225 mW power rating sustains short-duration 100 ns surges without degradation. |
| Microcontroller Reset Circuit | Industrial Sensor Signal Conditioning |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during power-up sequencing. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator setting precise 5.6 V threshold. Use Value: Low 0.25 μA leakage at 3 V ensures minimal current draw in deep-sleep modes. | Use Scenario: Providing stable bias voltage for analog front-end op-amps in 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing gain-setting resistors and ADC reference dividers. Use Value: Near-zero temperature coefficient (~0 mV/°C) minimizes drift over −40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V6 | Same 5.6 V nominal, 5% tolerance; 300 mW rating on FR-4; no AEC-Q101 qualification | Not qualified for automotive use; higher power margin suits non-space-constrained industrial boards | Select when higher power headroom is needed and automotive qualification is unnecessary |
| MMSZ5232BT1G | Identical electrical specs and SOT-23 package; same 225 mW rating; AEC-Q101 qualified | Same automotive-grade reliability; differs only in marking and tape/reel packaging (3,000 vs. 10,000 units) | Select when smaller reel size or legacy marking compatibility is required |
Compared with BZX84-C5V6 and MMSZ5232BT1G, the SZMMBZ5232BLT3 offers identical regulation performance and automotive qualification but ships in 10,000-unit reels-optimizing cost and logistics for high-volume automotive ECUs and consumer electronics production.
Availability
SZMMBZ5232BLT3 is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, and microcontroller reset circuits requiring stable component supply with automotive-grade reliability and Pb-free compliance.
Supply support for SZMMBZ5232BLT3 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xx/SZMMBZ52xx series targets compact, high-reliability voltage regulation in portable and automotive electronics, emphasizing small form factor, AEC-Q101 qualification, and robust ESD performance.
FAQ
What is the Zener voltage tolerance of the SZMMBZ5232BLT3?
The SZMMBZ5232BLT3 has a Zener voltage tolerance of ±5%, with a specified range of 5.32 V to 5.88 V at 20 mA test current (IZT). This tolerance is guaranteed across the full operating temperature range and is critical for precision reference applications where consistent trip points are required. The SZMMBZ5232BLT3 achieves this via tight process control during wafer fabrication and final test screening.
Is the SZMMBZ5232BLT3 suitable for automotive applications?
Yes, the SZMMBZ5232BLT3 is AEC-Q101 qualified and PPAP capable, confirming its reliability for automotive use cases including body control modules, infotainment power rails, and sensor biasing. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls and change management. The SZMMBZ5232BLT3 also meets stringent ESD requirements (>16 kV HBM) essential for vehicle assembly and field operation.
What is the function of pin 2 on the SZMMBZ5232BLT3?
Pin 2 of the SZMMBZ5232BLT3 is internally not connected (NC) and must remain unattached in the PCB layout. It serves no electrical function and is a structural artifact of the SOT-23 leadframe design. Connecting pin 2 may cause mechanical stress or unintended parasitic coupling; the SZMMBZ5232BLT3 operates correctly using only pins 1 (anode) and 3 (cathode).
How does the thermal resistance of the SZMMBZ5232BLT3 affect PCB layout?
The SZMMBZ5232BLT3 has a junction-to-ambient thermal resistance of 556 °C/W on FR-5 board, meaning each 1 mW of dissipated power raises junction temperature by 0.556 °C above ambient. To maintain reliability, keep power dissipation below 225 mW and avoid enclosing the SZMMBZ5232BLT3 in thermally isolated areas-use adjacent copper pour and minimize nearby heat sources.
Does the SZMMBZ5232BLT3 have a specified temperature coefficient?
Yes, the SZMMBZ5232BLT3 exhibits a near-zero temperature coefficient (~0 mV/°C) typical for 5.6 V Zener diodes, as confirmed by Figure 1 in the onsemi datasheet. This characteristic minimizes voltage drift over temperature, making the SZMMBZ5232BLT3 especially valuable in precision analog circuits where reference stability across −40°C to +125°C is required.
SZMMBZ5232BLT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5232BLT3 FAQ
1.How can I place an order for SZMMBZ5232BLT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5232BLT3 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 SZMMBZ5232BLT3 reliable?
The price and inventory of SZMMBZ5232BLT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5232BLT3 is usually 5 days.
3.What payment methods are accepted for SZMMBZ5232BLT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5232BLT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5232BLT3?
SZMMBZ5232BLT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5232BLT3 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 SZMMBZ5232BLT3?
For technical support, including SZMMBZ5232BLT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5232BLT3 requirements.
6.How does Aetrix verify that SZMMBZ5232BLT3 is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5232BLT3 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 SZMMBZ5232BLT3 meets industry standards.
7.What is the process for return or replacement of SZMMBZ5232BLT3?
All SZMMBZ5232BLT3 units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5232BLT3, 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 SZMMBZ5232BLT3 part is unused and in its original packaging.
Return procedure for SZMMBZ5232BLT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMBZ5232BLT3 Tags
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