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onsemi MMBZ5261BLT1G
- Part No.:
- MMBZ5261BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5261BLT1G.pdf
- Description:
- DIODE ZENER 47V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:20,840
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Product details
Overview
MMBZ5261BLT1G from onsemi is a 47 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 1000 Ω dynamic impedance at 2.7 mA test current and 0.1 μA leakage at 36 V reverse bias. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MMBZ5261BLT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and direct alternative part comparisons for reliable circuit protection and reference design.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring reverse-bias connection to regulate voltage. Its 47 V nominal Zener voltage is specified at 2.7 mA test current (IZT), with temperature coefficient optimized for stability across −65°C to +150°C junction range.
The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), enabling automated placement while maintaining low thermal resistance (556°C/W on FR-5). It complies with AEC-Q101 when ordered as SZ prefix variant and meets RoHS, Pb-free, and halogen-free requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65 V min / 47 V nom / 49.35 V max @ IZT = 2.7 mA - defines regulated output tolerance band for reference circuits |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 1000 Ω max @ IZT = 2.7 mA - determines output voltage variation under load transients |
| Leakage Current (IR) | 0.1 μA max @ VR = 36 V - ensures minimal standby current in undervoltage protection schemes |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables direct integration into handheld device front-end without external ESD clamps |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient environments |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting plastic case with corrosion-resistant finish and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be routed to ground or return path |
| 2 | No Connection | Internally unconnected; PCB pad may be omitted or left floating-no routing required |
| 3 | Cathode | Connected to regulated voltage node; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOT-23 footprint | Enables placement on high-density PCBs where height clearance <1.0 mm is mandatory |
| 225 mW FR-5 power rating | Supports stable regulation in battery-powered devices without heatsinking |
| 1000 Ω Zener impedance at 2.7 mA | Maintains <±0.5 V output deviation under 1 mA load step changes |
| Class 3 ESD immunity | Eliminates need for discrete TVS diodes in consumer portables handling frequent user contact |
| Pb-free, halogen-free, RoHS-compliant | Fulfills environmental compliance for global OEM shipments without material declaration overhead |
Applications
| Battery Overvoltage Protection | USB Port ESD Clamp |
|---|---|
Use Scenario: Monitoring lithium-ion battery pack voltage to prevent charging beyond 4.2 V/cell in multi-cell configurations. IC Role / Device Role / Timing Role: Zener diode used as precision shunt reference in comparator feedback network. Use Value: Tight 47 V tolerance ensures accurate trip point for 12S battery packs (564 V max), minimizing false shutdowns. | Use Scenario: Protecting USB 2.0 data lines from electrostatic discharge events during cable insertion. IC Role / Device Role / Timing Role: Passive clamp placed between D+ and ground to divert transient energy. Use Value: 16 kV HBM rating absorbs ESD pulses without degradation, preserving signal integrity over 10,000 insertions. |
| Industrial Sensor Reference | Automotive LIN Bus Voltage Clamp |
Use Scenario: Providing stable 47 V reference for analog-to-digital conversion of high-voltage sensor outputs (e.g., motor phase voltage). IC Role / Device Role / Timing Role: Shunt regulator establishing known bias point for op-amp input stage. Use Value: Low 0.1 μA leakage prevents loading of high-impedance sensor bridges, preserving measurement accuracy. | Use Scenario: Clamping LIN bus line voltage during load dump transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Transient voltage suppressor connected between LIN line and chassis ground. Use Value: 150°C max junction temperature allows operation near engine control units without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C47LT1G | Same 47 V nominal Zener, but 350 mW rating on FR-4 and higher 1500 Ω ZZT at 5 mA | Higher power handling suits higher-current regulation; less precise regulation due to higher impedance | Select when >225 mW dissipation is needed and tighter voltage regulation is not critical |
| SZMMBZ5261BLT1G | Identical electrical specs, but AEC-Q101 qualified and PPAP-capable with automotive traceability | Required for automotive ECUs; same SOT-23 footprint and pinout | Choose for automotive designs needing certified reliability and change-controlled manufacturing |
Compared with MMBZ5261BLT1G, BZX84-C47LT1G offers greater power margin but looser regulation, while SZMMBZ5261BLT1G provides identical performance with automotive qualification-enabling drop-in use in non-automotive systems or mandatory substitution in Tier 1 supply chains.
Availability
MMBZ5261BLT1G is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, industrial sensor signal conditioning, and automotive LIN bus clamping requiring stable component supply and long-term manufacturability.
Supply support for MMBZ5261BLT1G 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.
The MMBZ52xxBLT1G series is designed for compact, high-reliability voltage regulation in portable and space-constrained electronics, emphasizing low-profile packaging, ESD resilience, and broad Zener voltage coverage.
FAQ
What is the Zener voltage tolerance of MMBZ5261BLT1G?
The MMBZ5261BLT1G has a Zener voltage specification of 44.65 V minimum, 47 V nominal, and 49.35 V maximum at 2.7 mA test current (IZT), representing a ±5% tolerance band around the nominal value. This tolerance is guaranteed across operating temperatures from −65°C to +150°C and is measured using pulse testing to avoid self-heating effects. The MMBZ5261BLT1G datasheet confirms this range in the Electrical Characteristics table on page 3.
Does MMBZ5261BLT1G have a no-connect pin, and how should it be handled on PCB?
Yes, MMBZ5261BLT1G has pin 2 designated as "No Connection" per the mechanical outline and marking diagram in the datasheet. This terminal is internally unconnected and must not be soldered to any net. PCB layout should either omit the pad entirely or leave it un-routed and un-connected-no grounding or floating tie is required. Doing so avoids unintended parasitic coupling or assembly defects during reflow.
What is the maximum allowable junction temperature for MMBZ5261BLT1G?
The MMBZ5261BLT1G has a specified junction and storage temperature range of −65°C to +150°C, as stated in the Maximum Ratings table on page 1 of the datasheet. Operation beyond +150°C risks permanent parametric shift or catastrophic failure. Thermal design must ensure junction temperature remains within this limit under worst-case power dissipation and ambient conditions, using the 556°C/W RJA value for FR-5 boards.
How does the ESD rating of MMBZ5261BLT1G impact system-level protection design?
The MMBZ5261BLT1G carries Class 3 ESD rating (>16 kV per Human Body Model), meaning it can withstand repeated 16 kV discharges without parameter degradation. This eliminates the need for additional upstream TVS diodes in handheld or user-accessible interfaces, simplifying BOM and layout. However, it does not replace system-level IEC 61000-4-2 compliance testing-designers must still validate full subsystem robustness per application standards.
Is MMBZ5261BLT1G compatible with lead-free reflow processes?
Yes, MMBZ5261BLT1G is explicitly labeled "Pb-Free" and qualified for lead-free reflow. The datasheet specifies a maximum soldering temperature of 260°C for 10 seconds, matching standard JEDEC J-STD-020 profiles for Pb-free assembly. Its thermosetting plastic case and corrosion-resistant finish ensure reliability under these thermal cycles, and the "G" suffix in the part number denotes RoHS and halogen-free compliance.
MMBZ5261BLT1G 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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 105 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 36 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:
- SOT-23-3 (TO-236)
MMBZ5261BLT1G FAQ
1.How can I place an order for MMBZ5261BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5261BLT1G 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 MMBZ5261BLT1G reliable?
The price and inventory of MMBZ5261BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5261BLT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5261BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5261BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5261BLT1G?
MMBZ5261BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5261BLT1G 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 MMBZ5261BLT1G?
For technical support, including MMBZ5261BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5261BLT1G requirements.
6.How does Aetrix verify that MMBZ5261BLT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5261BLT1G 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 MMBZ5261BLT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5261BLT1G?
All MMBZ5261BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5261BLT1G, 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 MMBZ5261BLT1G part is unused and in its original packaging.
Return procedure for MMBZ5261BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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