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onsemi SZMMBZ5260BLT1G
- Part No.:
- SZMMBZ5260BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5260BLT1G.pdf
- Description:
- DIODE ZENER 43V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,410
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Product details
Overview
SZMMBZ5260BLT1G from onsemi is a 43 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 93 Ω dynamic impedance at 3 mA test current and 0.1 μA leakage at 33 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable power rails.
For engineers reviewing the SZMMBZ5260BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), AEC-Q101 qualification, ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse breakdown to maintain stable voltage across its cathode-anode terminals under varying load currents. Its 43 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing - typical for mid-voltage Zeners - enabling predictable drift behavior over −65°C to +150°C junction range.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports automated placement. With 0.1 μA leakage at VR = 33 V and 93 Ω impedance at IZT = 3 mA, it delivers tight regulation for signal-level reference and protection functions in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40.85 V (min) to 45.15 V (max) at 3 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 93 Ω at IZT = 3 mA - indicates AC voltage variation per mA change in Zener current; critical for noise-sensitive references |
| Leakage Current (IR) | 0.1 μA at VR = 33 V - ensures minimal parasitic current draw in standby or high-impedance sensing nodes |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - guarantees robustness against handling and board-level electrostatic discharge events |
| Junction Temp Range | −65°C to +150°C - enables operation in automotive under-hood, industrial control, and outdoor embedded environments |
Pinout & Package
SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch. Void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during regulation; must be routed with low-inductance path for transient response |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to higher-potential node; carries full Zener current; polarity band aligns with this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and ADAS power supervisors |
| Pb-Free / RoHS Compliant | Meets global environmental compliance requirements without compromising solderability or reliability |
| 225 mW FR-5 Power Rating | Enables use in compact battery-powered devices where thermal mass is limited and airflow absent |
| ESD >16 kV HBM | Eliminates need for external ESD protection in handheld and wearable product interfaces |
| Zener Voltage Range Support | Part of 2.4 V–91 V family - allows design reuse across multiple rail voltages using identical footprint |
Applications
| USB-C Port Protection | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamp transient overvoltage on USB-C CC lines during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener clamping diode placed between CC line and ground to limit voltage excursion to safe levels. Use Value: Prevents damage to USB PD controller ICs by limiting CC line voltage to ≤45.15 V during 8 kV contact discharge. |
Use Scenario: Provide stable 43 V reference for analog front-end conditioning of exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and sensor excitation circuitry. Use Value: Enables <±1% measurement accuracy over −40°C to +125°C ambient due to tight VZ tolerance and low TC drift. |
| Portable Medical Monitor Battery Rail | Industrial PLC Input Protection |
Use Scenario: Regulate auxiliary 43 V bias rail derived from Li-ion stack in portable ECG monitor. IC Role / Device Role / Timing Role: Low-power Zener shunt regulator maintaining stable supply for op-amp biasing. Use Value: Delivers 225 mW regulation within 1.3 mm × 2.9 mm footprint - critical for ultra-thin form factor designs. |
Use Scenario: Protect 24 V digital input channels from surges up to 45 V in factory automation controllers. IC Role / Device Role / Timing Role: Overvoltage clamp on optocoupler input side to prevent false triggering. Use Value: Withstands repeated 1 kV/μs transients while maintaining <0.1 μA leakage - preserves input impedance integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43LT1G | Same 43 V nominal Zener, but 350 mW rating on FR-4 and 70 Ω ZZT; not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial-grade consumer electronics only | Select when higher power margin is needed and automotive compliance is unnecessary |
| SZBZX84C43LT1G | 43 V Zener, AEC-Q101 qualified, 350 mW rating, 70 Ω ZZT, SOT-23 package | Higher power and lower impedance than SZMMBZ5260BLT1G, but larger thermal footprint impact | Choose when system requires tighter regulation (<2% VZ tolerance) and higher surge energy absorption |
Compared with BZX84-C43LT1G and SZBZX84C43LT1G, SZMMBZ5260BLT1G offers tighter integration into space-limited automotive modules via its 225 mW/93 Ω balance and native AEC-Q101 validation - making it optimal for cost- and size-sensitive ECUs where 43 V clamping is required without over-engineering.
Availability
SZMMBZ5260BLT1G is available at Aetrix Electronics and suitable for automotive infotainment power supervision, portable medical device voltage clamping, and industrial sensor interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SZMMBZ5260BLT1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMMBZ5260BLT1G belongs to the SZMMBZ52xxBLT1G automotive Zener series, engineered specifically for AEC-Q101-compliant voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener voltage tolerance of SZMMBZ5260BLT1G?
The SZMMBZ5260BLT1G has a Zener voltage range of 40.85 V (minimum) to 45.15 V (maximum) at 3 mA test current, corresponding to a ±5% tolerance around the nominal 43 V rating. This tolerance is guaranteed across the full operating temperature range and is verified per onsemi's production testing protocol. The SZMMBZ5260BLT1G datasheet specifies this range in the Electrical Characteristics table on page 3.
Is SZMMBZ5260BLT1G suitable for automotive applications?
Yes, SZMMBZ5260BLT1G is AEC-Q101 qualified and PPAP capable, with manufacturing traceability and process controls aligned to automotive quality standards. Its −65°C to +150°C junction temperature range, >16 kV HBM ESD rating, and Pb-free RoHS compliance make it appropriate for under-hood and cabin ECUs. The "SZ" prefix explicitly denotes automotive-grade variants of the MMBZ52xxBLT1G series.
What is the thermal resistance of SZMMBZ5260BLT1G on FR-5 board?
The junction-to-ambient thermal resistance (RJA) of SZMMBZ5260BLT1G is 556 °C/W when mounted on an FR-5 board at 25°C ambient. This value determines the temperature rise per watt dissipated and is used to calculate maximum allowable power at elevated ambient temperatures. Derating begins at 1.8 mW/°C above 25°C, as specified in the Maximum Ratings table.
Does SZMMBZ5260BLT1G have a no-connect pin, and how should it be handled on PCB?
Yes, SZMMBZ5260BLT1G has Pin 2 designated as "No Connection" per the mechanical outline and marking diagram in the datasheet. This terminal is internally unconnected and must remain electrically floating on the PCB - no trace, pad, or thermal relief should be attached. Incorrect routing of Pin 2 may cause assembly defects or unintended parasitic coupling.
How does the leakage current of SZMMBZ5260BLT1G compare to similar 43 V Zeners?
SZMMBZ5260BLT1G specifies 0.1 μA maximum reverse leakage current at 33 V (77% of nominal VZ), which is consistent with other onsemi 43 V Zeners in the same family. This low leakage supports high-impedance sensing nodes and battery-critical applications where standby current must be minimized. Measured values are validated per JEDEC JESD22-A115 test conditions.
SZMMBZ5260BLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 93 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 33 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)
SZMMBZ5260BLT1G FAQ
1.How can I place an order for SZMMBZ5260BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5260BLT1G 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 SZMMBZ5260BLT1G reliable?
The price and inventory of SZMMBZ5260BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5260BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5260BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5260BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5260BLT1G?
SZMMBZ5260BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5260BLT1G 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 SZMMBZ5260BLT1G?
For technical support, including SZMMBZ5260BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5260BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5260BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5260BLT1G 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 SZMMBZ5260BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5260BLT1G?
All SZMMBZ5260BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5260BLT1G, 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 SZMMBZ5260BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5260BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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