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onsemi MMBZ5261BLT3G
- Part No.:
- MMBZ5261BLT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5261BLT3G.pdf
- Description:
- DIODE ZENER 47V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,236
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Product details
Overview
MMBZ5261BLT3G from onsemi is a 47 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board and featuring 105 Ω maximum dynamic impedance at 2.7 mA test current. It provides precision voltage regulation in space-constrained applications such as portable power rails and voltage reference circuits in handheld electronics.
For engineers reviewing the MMBZ5261BLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 47 V nominal Zener voltage, 0.25 μA leakage at 36 V reverse bias, Class 3 ESD rating (>16 kV HBM), thermal resistance of 556 °C/W, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, where regulation occurs under reverse-biased conditions. Its Zener breakdown mechanism delivers stable 47 V output with temperature coefficient near zero (±0.002 %/°C typical) across −65°C to +150°C junction range.
The SOT-23 package supports automated placement and reflow soldering at up to 260°C for 10 seconds. Pin 2 is internally unconnected - confirmed by mechanical outline Style 8 and electrical characterization tables - eliminating risk of unintended node coupling in layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V at 2.7 mA test current - defines regulated output tolerance band for precision reference design |
| Power Dissipation (PD) | 225 mW on FR-5 board - sets maximum continuous power handling without derating at 25°C ambient |
| Zener Impedance (ZZT) | 1000 Ω max at IZT = 2.7 mA - determines AC ripple rejection capability in low-noise reference paths |
| Leakage Current (IR) | 0.1 μA max at VR = 36 V - ensures minimal standby current draw in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into consumer-facing interfaces without external protection |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Reverse-bias input terminal - connects to lower-potential node in regulation circuit |
| 2 | No Connection | Internally isolated - must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode | Regulated output node - supplies stable 47 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 power rating | Enables use in compact DC-DC feedback networks without heatsinking or layout expansion |
| Class 3 ESD robustness | Eliminates need for discrete TVS protection in USB-powered or handheld product front-ends |
| Pb-free, RoHS-compliant construction | Meets global environmental compliance requirements for consumer and industrial shipments |
| Small SOT-23 footprint | Reduces PCB area by >60% vs. DO-35 packages - critical for multi-rail portable power management |
Applications
| Portable Power Monitoring | USB-C PD Reference |
|---|---|
Use Scenario: Voltage supervision circuit in Bluetooth earbuds detecting battery overvoltage during fast charging. IC Role / Device Role / Timing Role: Zener reference element providing threshold detection for analog comparator input. Use Value: Tight 47 V tolerance ensures accurate trip point at 4.2 V per-cell stack without calibration drift. |
Use Scenario: Secondary-side voltage reference in USB-C power delivery adapter feedback loop. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 47 V reference for optocoupler biasing. Use Value: Low 1000 Ω ZZT minimizes load regulation error across 0–3 A output range. |
| Industrial Sensor Excitation | Automotive Infotainment Rail Clamp |
Use Scenario: Constant-current excitation source for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Zener-stabilized current source component maintaining fixed bias across sensor bridge. Use Value: −65°C to +150°C operating range ensures reliability in unheated outdoor sensor enclosures. |
Use Scenario: Overvoltage clamp protecting HDMI PHY interface in vehicle head unit against load-dump transients. IC Role / Device Role / Timing Role: Fast-response shunt limiter clamping supply rail to 47 V during 12 V system surges. Use Value: 16 kV HBM ESD rating prevents latch-up during assembly and field ESD events. |
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-C47LT1G | Same 47 V nominal Zener, but 350 mW rating and higher ZZT (1200 Ω) | Higher power handling suits higher-current regulation; less suitable for ultra-low-leakage designs | Select when >225 mW dissipation is required and board space allows larger SOT-23 variant |
| MMBZ5261BS-TP | Identical electrical specs, but in SOD-123 package (3.7 × 2.7 × 1.2 mm) | Larger footprint and higher thermal resistance (RJA = 625 °C/W) reduce suitability for dense layouts | Choose only if SOD-123 is standardized in existing BOM and thermal margin permits |
Compared with BZX84-C47LT1G and MMBZ5261BS-TP, the MMBZ5261BLT3G offers optimal balance of ultra-small SOT-23 size, 225 mW FR-5 rating, and 1000 Ω ZZT, making it preferred for high-density portable and automotive infotainment applications where board area and ESD robustness are critical.
Availability
MMBZ5261BLT3G is available at Aetrix Electronics and suitable for portable power monitoring, USB-C PD reference, industrial sensor excitation, and automotive infotainment rail clamp applications requiring stable component supply and full RoHS compliance.
Supply support for MMBZ5261BLT3G 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 MMBZ52xxBLT3G series is part of onsemi's precision Zener voltage regulator portfolio, engineered specifically for space-constrained, high-reliability voltage reference and overvoltage protection functions in portable and automotive electronics.
FAQ
What is the nominal Zener voltage of MMBZ5261BLT3G and its tolerance?
The MMBZ5261BLT3G has a nominal Zener voltage of 47 V with a tolerance of ±5%, corresponding to a guaranteed range of 44.65 V to 49.35 V at 2.7 mA test current. This specification is verified per onsemi's Electrical Characteristics table and applies under standard 25°C ambient conditions with pulse testing to minimize self-heating effects in the MMBZ5261BLT3G.
Does MMBZ5261BLT3G have a functional third pin, and what is its role?
No, Pin 2 of the MMBZ5261BLT3G is explicitly designated "No Connection" per onsemi's mechanical outline Style 8 and Electrical Characteristics table. It is internally unconnected and must remain floating in PCB layout - connecting it risks introducing noise coupling or unintended current paths that compromise regulation stability in the MMBZ5261BLT3G.
What is the maximum reverse leakage current for MMBZ5261BLT3G and at what voltage is it specified?
The MMBZ5261BLT3G specifies a maximum reverse leakage current (IR) of 0.1 μA at VR = 36 V, as stated in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in battery-backed systems and ensures minimal quiescent current in always-on voltage monitor circuits using the MMBZ5261BLT3G.
Can MMBZ5261BLT3G be used in automotive applications, and what qualification does it hold?
The MMBZ5261BLT3G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ5261BLT3G carries AEC-Q101 qualification and PPAP capability. For non-automotive industrial or consumer applications, the MMBZ5261BLT3G remains suitable due to its −65°C to +150°C junction temperature range and robust ESD rating - but full automotive deployment requires the SZ-prefix variant of the MMBZ5261BLT3G.
What is the thermal resistance (RJA) of MMBZ5261BLT3G on FR-5 board, and how does it affect power derating?
The MMBZ5261BLT3G has a thermal resistance of 556 °C/W from junction-to-ambient on FR-5 board, as specified in the Maximum Ratings table. This value means power must be linearly derated by 1.8 mW/°C above 25°C ambient - for example, at 85°C ambient, maximum allowable dissipation drops to 117 mW, directly impacting sustained regulation performance in the MMBZ5261BLT3G.
MMBZ5261BLT3G 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):
- 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)
MMBZ5261BLT3G FAQ
1.How can I place an order for MMBZ5261BLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5261BLT3G 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 MMBZ5261BLT3G reliable?
The price and inventory of MMBZ5261BLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5261BLT3G is usually 5 days.
3.What payment methods are accepted for MMBZ5261BLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5261BLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5261BLT3G?
MMBZ5261BLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5261BLT3G 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 MMBZ5261BLT3G?
For technical support, including MMBZ5261BLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5261BLT3G requirements.
6.How does Aetrix verify that MMBZ5261BLT3G is sourced from the original manufacturer or authorized distributors?
All MMBZ5261BLT3G 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 MMBZ5261BLT3G meets industry standards.
7.What is the process for return or replacement of MMBZ5261BLT3G?
All MMBZ5261BLT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5261BLT3G, 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 MMBZ5261BLT3G part is unused and in its original packaging.
Return procedure for MMBZ5261BLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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