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onsemi MMBZ5263ELT1
- Part No.:
- MMBZ5263ELT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5263ELT1.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
MMBZ5263ELT1 from onsemi is a 56 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 150 mA test current (IZT), 1300 Ω dynamic impedance (ZZT), and 0.1 μA reverse leakage at 43 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the MMBZ5263ELT1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), peak pulse power (225 W), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-biased Zener breakdown mode, delivering stable regulation across ambient temperatures from −65°C to +150°C. Its 56 V nominal Zener voltage falls within the 2.4–91 V family range, with temperature coefficient optimized for mid-voltage Zeners (≈+3.5 mV/°C typical per Figure 1).
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), polarity band marking, and Pb-free construction compliant with RoHS. Thermal performance is specified for FR-5 board (RJA = 556 °C/W) and alumina substrate (RJA = 417 °C/W), supporting both standard and thermally enhanced mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V @ IZT = 2.2 mA - defines clamping threshold with ±5% tolerance at nominal 56 V |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets continuous DC power limit before thermal derating begins |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 2.2 mA - indicates regulation stiffness; higher value implies greater output voltage variation under load change |
| Reverse Leakage (IR) | 0.1 μA @ VR = 43 V - confirms low standby current in pre-breakdown region, critical for battery-powered systems |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - ensures robustness against handling-induced electrostatic discharge |
| Peak Pulse Power | 225 W @ 8 × 20 μs waveform - supports transient overvoltage suppression without failure |
| Junction Temperature Range | −65°C to +150°C - enables operation in automotive under-hood or industrial environments |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting case, corrosion-resistant finish, UL 94 V-0 flammability rating, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be held at voltage ≤ VZ relative to cathode for regulation |
| Pin 2 | No Connection | Internally unconnected; no PCB trace or pad required; electrically isolated |
| Pin 3 | Cathode | Connected to higher-potential node; polarity band on package identifies this terminal for correct orientation during assembly |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-4/FR-5 board | Enables use in space-constrained consumer portables without forced cooling or heatsinking |
| ESD rating >16 kV (HBM) | Eliminates need for external ESD protection in handheld device front-end circuits |
| Pb-free and RoHS-compliant packaging | Meets global environmental compliance requirements for commercial and industrial end equipment |
| Small SOT-23 footprint | Supports ≥2× higher component density vs. DO-35 or SOD-123 packages in compact PCB designs |
| 150°C maximum junction temperature | Allows reliable operation in sealed enclosures or near heat-generating ICs without thermal throttling |
Applications
| Battery Voltage Monitoring | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Monitoring Li-ion battery pack voltage in smart wearables to trigger low-battery alerts or shutdown before deep discharge. IC Role / Device Role / Timing Role: Zener reference element in comparator input divider network, providing stable 56 V threshold scaled via resistive divider. Use Value: Tight 5% VZ tolerance ensures consistent trip point across production units; low IR minimizes quiescent current drain from battery. |
Use Scenario: Clamping transient surges on USB VBUS line caused by hot-plug inductive kick or ESD events. IC Role / Device Role / Timing Role: Shunt overvoltage protector placed between VBUS and GND, conducting only above 56 V to divert surge energy. Use Value: 225 W peak pulse rating absorbs 8×20 μs transients per IEC 61000-4-5; >16 kV HBM rating prevents field failure during handling. |
| Industrial Sensor Signal Conditioning | Automotive Infotainment Power Rail Clamp |
|
Use Scenario: Protecting analog front-end inputs of 24 V industrial pressure sensors from supply rail transients during PLC switching. IC Role / Device Role / Timing Role: Precision clamp referenced to local ground, limiting sensor output swing to safe levels for downstream ADC input. Use Value: 1300 Ω ZZT ensures minimal loading on sensor output; −65°C to +150°C operating range matches industrial ambient specs. |
Use Scenario: Suppressing load-dump spikes on 12 V infotainment head-unit power rail in vehicles meeting ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Secondary clamp staged after primary TVS, fine-tuning clamping level to protect 56 V-rated DC-DC converter inputs. Use Value: AEC-Q101 qualification (via SZ-prefix variants) validates reliability for automotive use; SOT-23 allows placement near sensitive ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5262ELT1/T3G | 51–53.55 V nominal Zener range (51 V typ), 125 mA IZT, 1100 Ω ZZT | Lower clamping voltage; better suited for 48 V system rails or tighter-tolerance 51 V references | Select when 51 V regulation is required and 56 V overshoot is unacceptable |
| MMBZ5265ELT1G | 58.9–65.1 V nominal Zener range (62 V typ), 2.0 mA IZT, 1400 Ω ZZT | Higher clamping voltage; appropriate for 60 V bus protection or higher-threshold monitoring | Choose for applications needing >56 V standoff, such as 60 V PoE++ or telecom backup supplies |
Compared with MMBZ5262ELT1/T3G and MMBZ5265ELT1G, the MMBZ5263ELT1 provides the precise 56 V nominal regulation point required for 48 VDC industrial systems and 56 V telecom interfaces, balancing clamping margin and conduction loss better than adjacent family members.
Availability
MMBZ5263ELT1 is available at Aetrix Electronics and suitable for battery management systems, USB-C power delivery protection, industrial sensor signal conditioning, and automotive infotainment power rail clamping requiring stable component supply and long-term obsolescence support.
Supply support for MMBZ5263ELT1 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 focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
The MMBZ52xxELT1G series is designed for compact, high-reliability voltage regulation in space-constrained portable and automotive electronics, emphasizing low-profile SOT-23 integration and robust transient handling.
FAQ
What is the nominal Zener voltage and tolerance of MMBZ5263ELT1?
The MMBZ5263ELT1 has a nominal Zener voltage of 56 V with a tolerance of ±5%, corresponding to a guaranteed range of 53.2 V to 58.8 V at IZT = 2.2 mA and TA = 25°C. This specification is verified per onsemi's Electrical Characteristics table on page 3 of the August 2024 datasheet revision. The MMBZ5263ELT1 achieves this regulation using silicon Zener breakdown physics, not avalanche mechanisms.
Is MMBZ5263ELT1 suitable for automotive applications?
The MMBZ5263ELT1 itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ5263ELT1G is explicitly listed as AEC-Q101 qualified and PPAP capable in the same datasheet. For automotive use, engineers should specify the SZ-prefix variant. The MMBZ5263ELT1 remains suitable for industrial and consumer applications where AEC-Q101 is not mandated.
What is the thermal resistance and maximum junction temperature of MMBZ5263ELT1?
The MMBZ5263ELT1 has a thermal resistance of 556 °C/W (junction-to-ambient) when mounted on FR-5 board, and its junction temperature range is −65°C to +150°C. These values are specified in the Maximum Ratings table on page 1 of the datasheet. Derating begins above 25°C at 1.8 mW/°C, meaning usable power drops to 135 mW at 80°C ambient.
Does MMBZ5263ELT1 have a no-connect pin, and how is it identified?
Yes, MMBZ5263ELT1 has a no-connect terminal at Pin 2, as confirmed in the Pinout section on pages 2 and 5 of the datasheet and the SOT-23 Style 8 mechanical outline. Pin 1 is Anode, Pin 2 is NC, and Pin 3 is Cathode, with the cathode identified by a polarity band on the package body. This three-terminal configuration is standard across the MMBZ52xxELT1G series.
What is the peak pulse power rating and test condition for MMBZ5263ELT1?
The MMBZ5263ELT1 is rated for 225 W peak pulse power under an 8 × 20 μs current waveform, as stated in the Maximum Ratings table. This rating applies to non-repetitive surges and is validated per Figure 9 in the datasheet. The device uses this capability to absorb transient energy without failure, making it suitable for IEC 61000-4-5 Level 3 surge protection when properly applied.
MMBZ5263ELT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5263ELT1 FAQ
1.How can I place an order for MMBZ5263ELT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5263ELT1 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 MMBZ5263ELT1 reliable?
The price and inventory of MMBZ5263ELT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5263ELT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5263ELT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5263ELT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5263ELT1?
MMBZ5263ELT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5263ELT1 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 MMBZ5263ELT1?
For technical support, including MMBZ5263ELT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5263ELT1 requirements.
6.How does Aetrix verify that MMBZ5263ELT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5263ELT1 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 MMBZ5263ELT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5263ELT1?
All MMBZ5263ELT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5263ELT1, 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 MMBZ5263ELT1 part is unused and in its original packaging.
Return procedure for MMBZ5263ELT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5263ELT1 Tags
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