My Inquiry
My Account
onsemi MMBZ5232BLT1
- Part No.:
- MMBZ5232BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5232BLT1.pdf
- Description:
- DIODE ZENER 5.6V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,025
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5232BLT1 from onsemi is a 225 mW, 5.6 V nominal Zener voltage regulator diode in SOT-23 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits such as portable power rails, LDO feedback networks, and ESD-sensitive signal lines.
For engineers reviewing the MMBZ5232BLT1 datasheet, pinout, applications, or equivalent options, this device delivers stable regulation at 5.6 V with 11 Ω dynamic impedance at 20 mA test current, Class 3 ESD robustness (>16 kV HBM), and operation across −65°C to +150°C junction temperature range.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled nominal Zener voltage of 5.6 V (min 5.32 V, max 5.88 V) at 20 mA test current. Its low dynamic impedance (11 Ω at IZT) ensures minimal voltage deviation under load transients, while its 225 mW power rating on FR-5 board supports compact, high-density PCB layouts.
The device features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode), polarity band marking, and Pb-free, RoHS-compliant construction. It exhibits 0.25 μA leakage current at 3 V reverse bias and maintains regulation stability across industrial temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V - precise reference voltage for feedback loops and clamping at typical operating current |
| Zener Voltage Range | 5.32 V to 5.88 V - guaranteed regulation window enabling reliable tolerance budgeting in 5 V system designs |
| Dynamic Impedance | 11 Ω at 20 mA - low AC resistance minimizes output voltage ripple during transient load changes |
| Power Dissipation | 225 mW on FR-5 board - sufficient headroom for continuous operation in handheld and battery-powered applications |
| ESD Rating | Class 3 (>16 kV HBM) - protects downstream circuitry from human-body-model electrostatic discharge events |
| Leakage Current | 0.25 μA at 3 V reverse bias - negligible standby current draw in always-on monitoring circuits |
| Junction Temperature Range | −65°C to +150°C - supports deployment in automotive under-hood, industrial control, and outdoor electronics |
Pinout & Package
SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm pitch, void-free thermosetting plastic case with corrosion-resistant finish and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| Pin 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad should tie to this terminal |
| Pin 3 | Cathode | Connected to higher-potential node; polarity band on package identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables use in ultra-compact 5 V rail protection without thermal derating in standard PCB environments |
| Class 3 ESD Robustness (>16 kV HBM) | Eliminates need for external ESD diodes in USB, audio jack, and button interface protection schemes |
| Pb-Free, Halogen-Free, RoHS-Compliant Construction | Meets global environmental compliance requirements for consumer, medical, and industrial end equipment |
| Small SOT-23 Footprint | Reduces board area by >70% vs. DO-35 through-hole Zeners, supporting high-density portable PCB layouts |
| Stable Zener Voltage Across Temperature | Temperature coefficient optimized near zero crossing for 5.6 V devices, minimizing drift in reference circuits |
Applications
| USB Port Overvoltage Protection | LDO Feedback Voltage Reference |
|---|---|
Use Scenario: Protects USB data and power lines from accidental 12 V connection or surge-induced voltage spikes. IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and GND to shunt excess energy before it reaches USB controller IC. Use Value: Prevents latch-up or permanent damage to USB PHY with <5.88 V clamping threshold and 225 mW dissipation capability. |
Use Scenario: Provides accurate 5.6 V reference for adjustable LDO feedback divider network in battery-powered sensors. IC Role / Device Role / Timing Role: Stable voltage reference source ensuring ±2% output regulation accuracy across temperature and load. Use Value: Enables consistent 3.3 V output despite input variation from 3.6–5.5 V Li-ion battery range. |
| Microcontroller I/O Pin ESD Clamp | Industrial Sensor Signal Conditioning |
Use Scenario: Installed on GPIO lines of MCU-based edge nodes exposed to field handling and connector mating cycles. IC Role / Device Role / Timing Role: Low-leakage (<0.25 μA) Zener shunt that activates only above 5.88 V, preserving signal integrity at normal logic levels. Use Value: Survives >16 kV HBM discharges without parameter shift, maintaining long-term reliability in unattended deployments. |
Use Scenario: Stabilizes excitation voltage for bridge-based pressure transducers operating in factory-floor environments. IC Role / Device Role / Timing Role: Precision Zener reference supplying regulated 5.6 V to Wheatstone bridge, reducing measurement drift. Use Value: Limits total error contribution to <0.1% FS over −40°C to +85°C ambient due to tight VZ tolerance and low TC. |
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 Zener, but 300 mW rating on FR-4 and higher ZZT (20 Ω at 5 mA) | Higher power handling suits higher-current clamping; less suitable for ultra-low-leakage reference use | Select when needing greater surge energy absorption and board layout allows larger SOT-23 variant footprint |
| MMBZ5232BS | Identical electrical specs but in SOD-123 package (larger, 3.7 mm × 1.6 mm), no NC pin | Lower thermal resistance (RJA = 350°C/W) enables higher continuous power in thermally constrained areas | Choose when PCB assembly process favors two-terminal devices or thermal performance outweighs size constraints |
Compared with BZX84-C5V6 and MMBZ5232BS, the MMBZ5232BLT1 offers the smallest footprint and lowest leakage among 5.6 V Zeners in its class, making it optimal for miniaturized, low-power, and ESD-critical applications where pin count and board area are premium resources.
Availability
MMBZ5232BLT1 is available at Aetrix Electronics and suitable for USB port protection, LDO feedback referencing, microcontroller I/O clamping, and industrial sensor excitation requiring stable component supply with full traceability and lifecycle continuity.
Supply support for MMBZ5232BLT1 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G series was engineered specifically for high-density, low-power voltage regulation and protection in portable and space-constrained electronics, emphasizing small size, ESD resilience, and stable parametric performance across temperature.
FAQ
What is the exact Zener voltage tolerance of MMBZ5232BLT1 at 20 mA test current?
The MMBZ5232BLT1 has a guaranteed Zener voltage range of 5.32 V (minimum) to 5.88 V (maximum) at IZT = 20 mA and TA = 25°C, corresponding to a ±5% tolerance around the 5.6 V nominal value. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for MMBZ5232BLT1G/T3G.
Does MMBZ5232BLT1 have a functional third pin, and how should Pin 2 be handled on the PCB?
No, Pin 2 of the MMBZ5232BLT1 is explicitly designated as "No Connection" in the datasheet's pinout diagram (Style 8). It must remain electrically floating-no trace, pad, or copper pour should connect to it. The active terminals are only Pin 1 (Anode) and Pin 3 (Cathode), and incorrect routing to Pin 2 may compromise solder joint integrity or cause assembly defects.
Can MMBZ5232BLT1 be used as a replacement for older MMBZ5232B variants without design changes?
Yes, the MMBZ5232BLT1 is a direct replacement for legacy MMBZ5232B parts in terms of electrical specifications, pinout, and package dimensions. The "LT1" suffix denotes tape-and-reel packaging per JEDEC standard, and all critical parameters-including VZ, IZT, ZZT, and thermal ratings-are identical to those of the original MMBZ5232B series.
What is the maximum reverse leakage current for MMBZ5232BLT1 at 3 V bias and 25°C?
The maximum reverse leakage current for MMBZ5232BLT1 is 0.25 μA at VR = 3 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage supports use in high-impedance reference networks and battery-operated systems where standby current must be minimized.
Is MMBZ5232BLT1 qualified for automotive applications, and what certifications does it hold?
The MMBZ5232BLT1 is not AEC-Q101 qualified; only the SZ-prefix variants (e.g., SZMMBZ5232BLT1G) carry automotive qualification. However, MMBZ5232BLT1 meets industrial-grade reliability standards, is RoHS-compliant, Pb-free, halogen-free, and rated for operation from −65°C to +150°C junction temperature-making it suitable for non-safety-critical automotive subsystems like infotainment and body electronics when validated per customer requirements.
MMBZ5232BLT1 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5232BLT1 FAQ
1.How can I place an order for MMBZ5232BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5232BLT1 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 MMBZ5232BLT1 reliable?
The price and inventory of MMBZ5232BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5232BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5232BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5232BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5232BLT1?
MMBZ5232BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5232BLT1 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 MMBZ5232BLT1?
For technical support, including MMBZ5232BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5232BLT1 requirements.
6.How does Aetrix verify that MMBZ5232BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5232BLT1 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 MMBZ5232BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5232BLT1?
All MMBZ5232BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5232BLT1, 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 MMBZ5232BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5232BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5232BLT1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
