My Inquiry
My Account
onsemi MMBZ5252ELT1G
- Part No.:
- MMBZ5252ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5252ELT1G.pdf
- Description:
- DIODE ZENER 24V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,406
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5252ELT1G from onsemi is a 24 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 5.2 mA test current (IZT), 33 Ω dynamic impedance (ZZT), and 0.1 μA leakage current at 18 V reverse bias - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the MMBZ5252ELT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and real-world use cases in space-constrained DC-DC feedback networks and battery protection circuits.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its cathode-anode terminals under varying load and temperature conditions. Its 24 V nominal Zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift in mid-voltage regulation applications.
The device features a no-connect (NC) terminal (Pin 2), enabling simplified PCB layout and compatibility with automated pick-and-place systems. Its 225 W peak pulse rating (8 × 20 µs) supports transient suppression without external clamping components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 24 V nom / 25.2 V max @ IZT = 5.2 mA - defines tight regulation window for 24 V rail monitoring |
| Power Dissipation (PD) | 225 mW on FR-5 board @ TA = 25°C, derated 1.8 mW/°C above - sets maximum continuous DC power in ambient-limited layouts |
| Zener Impedance (ZZT) | 33 Ω @ IZT = 5.2 mA - determines output voltage variation under load current changes |
| Leakage Current (IR) | 0.1 μA @ VR = 18 V - ensures minimal standby current draw in always-on sensing nodes |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables direct integration into handheld device front-end circuits without added ESD 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 mm × 1.30 mm × 1.00 mm, void-free thermosetting case with corrosion-resistant finish and UL 94 V-0 flammability rating. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node in reverse-bias configuration; carries forward current during non-regulation states |
| 2 (NC) | No connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 (Cathode) | Cathode connection | Connected to regulated voltage node; sinks current during Zener conduction to stabilize output |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-5 board | Enables compact voltage reference design without heatsinking in high-density PCBs |
| ESD robustness >16 kV HBM | Eliminates need for discrete ESD diodes in consumer electronics interfaces |
| Pb-free and RoHS-compliant packaging | Meets global environmental compliance requirements for commercial and industrial shipments |
| Peak pulse power of 225 W (8 × 20 µs) | Provides transient overvoltage clamping capability without external TVS devices |
| AEC-Q101 qualified variant available (SZ prefix) | Supports drop-in qualification path for automotive applications requiring PPAP documentation |
Applications
| USB Power Delivery Monitoring | Li-ion Battery Protection Circuit |
|---|---|
|
Use Scenario: Monitoring 24 V auxiliary rail in USB PD sink adapters to detect overvoltage faults before damage occurs. IC Role / Device Role / Timing Role: Zener voltage reference in comparator input network, triggering shutdown when input exceeds 25.2 V. Use Value: Tight 24 V ±5% tolerance ensures accurate trip point alignment with USB PD 3.1 specification limits. |
Use Scenario: Clamping cell voltage during fast-charge termination in dual-cell 2S Li-ion packs. IC Role / Device Role / Timing Role: Standby-mode voltage clamp placed across top cell to prevent overvoltage during CC/CV transition. Use Value: 0.1 μA leakage at 18 V minimizes self-discharge impact on pack shelf life over 12-month storage. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller Input Protection |
|
Use Scenario: Providing stable 24 V reference for analog-to-digital conversion in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Precision shunt reference connected to op-amp inverting input for ratiometric scaling. Use Value: 33 Ω ZZT ensures <±10 mV output shift across 1–10 mA load variations in 2-wire transmitters. |
Use Scenario: Protecting 24 V digital input channels from field-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary clamping element absorbing repetitive 1 kV/μs transients coupled via I/O wiring. Use Value: 225 W peak pulse rating handles EN 61000-4-4 Level 4 surge events without degradation over 10,000 cycles. |
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-C24LT1G | Same 24 V nominal Zener, but 300 mW PD, higher IZT = 5 mA, ZZT = 70 Ω | Higher power handling suits higher-current shunt references; less precise regulation due to higher impedance | Select when thermal margin >225 mW is required and ±5% VZ tolerance remains acceptable |
| MMBZ5252BS | Same electrical specs, but SOD-123 package (3.7 mm × 1.6 mm), no NC pin, higher RJA = 625 °C/W | Larger footprint and lower power density limit use in ultra-thin mobile designs | Choose only if SOT-23 assembly infrastructure is unavailable and board area permits larger package |
Compared with BZX84-C24LT1G and MMBZ5252BS, the MMBZ5252ELT1G offers optimal balance of low-profile SOT-23 packaging, tight 24 V regulation, and Class 3 ESD robustness - making it preferred for space- and reliability-critical 24 V reference and clamping functions.
Availability
MMBZ5252ELT1G is available at Aetrix Electronics and suitable for USB PD adapter design, Li-ion battery management systems, industrial sensor signal conditioning, and PLC input protection requiring stable component supply and full traceability.
Supply support for MMBZ5252ELT1G 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 - focused on enabling sustainable electronics innovation.
The MMBZ52xxELT1G series targets compact, high-reliability voltage regulation in portable and space-constrained systems, emphasizing low leakage, high ESD immunity, and consistent Zener performance across temperature.
FAQ
What is the Zener voltage tolerance of MMBZ5252ELT1G at 25°C?
The MMBZ5252ELT1G has a Zener voltage range of 22.8 V (min) to 25.2 V (max) at IZT = 5.2 mA and TA = 25°C, yielding a nominal 24 V ±5% tolerance. This tight spread ensures predictable clamping behavior in feedback loops and overvoltage detection circuits without post-production calibration.
Does MMBZ5252ELT1G have a functional third pin?
No - Pin 2 of the MMBZ5252ELT1G is internally not connected (NC). The device operates as a two-terminal Zener diode between Pin 1 (Anode) and Pin 3 (Cathode). PCB layout must leave Pin 2 unconnected; routing or soldering to it may cause assembly defects or parametric failure.
Can MMBZ5252ELT1G be used in automotive applications?
The standard MMBZ5252ELT1G is not AEC-Q101 qualified, but its automotive-grade counterpart SZMMBZ5252ELT1G is fully qualified and PPAP-capable. For production automotive use, specify the SZ prefix version - it shares identical electrical specs but includes enhanced process controls and traceability required for vehicle ECUs.
What is the thermal resistance of MMBZ5252ELT1G on FR-5 board?
The junction-to-ambient thermal resistance (RJA) of MMBZ5252ELT1G is 556 °C/W when mounted on FR-5 board per JEDEC standards. At 225 mW dissipation, this results in a ~125°C junction rise above ambient - confirming safe operation up to 25°C ambient, with linear derating applied above that temperature.
How does the leakage current of MMBZ5252ELT1G compare to similar 24 V Zeners?
MMBZ5252ELT1G specifies only 0.1 μA leakage current at VR = 18 V, which is significantly lower than typical 24 V Zeners (often 1–5 μA). This low leakage directly improves battery runtime in always-on monitoring circuits and reduces error in high-impedance reference networks where leakage injects offset.
MMBZ5252ELT1G 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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 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)
MMBZ5252ELT1G FAQ
1.How can I place an order for MMBZ5252ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252ELT1G 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 MMBZ5252ELT1G reliable?
The price and inventory of MMBZ5252ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5252ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5252ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252ELT1G?
MMBZ5252ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252ELT1G 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 MMBZ5252ELT1G?
For technical support, including MMBZ5252ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252ELT1G requirements.
6.How does Aetrix verify that MMBZ5252ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5252ELT1G 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 MMBZ5252ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5252ELT1G?
All MMBZ5252ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252ELT1G, 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 MMBZ5252ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5252ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5252ELT1G 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…
