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onsemi MMSZ5272BT1G
- Part No.:
- MMSZ5272BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5272BT1G.pdf
- Description:
- DIODE ZENER 110V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,499
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Product details
Overview
MMSZ5272BT1G from onsemi is a 5% tolerance, 110 V nominal Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 1.1 mA test current (IZT), 750 Ω maximum dynamic impedance (ZZT), and 0.1 µA reverse leakage at 84 V (VR). It serves as a precision voltage reference or overvoltage clamp in industrial power supply feedback loops and analog sensor signal conditioning circuits.
For engineers reviewing the MMSZ5272BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 110 V ±5% Zener voltage tolerance, thermal equilibrium–specified VZ measurement condition (TL = 30°C ±1°C), 340°C/W junction-to-ambient thermal resistance, and Pb-free SOD−123 package compatibility with automated assembly.
Technical Context
The MMSZ5272BT1G operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias voltage regulation under medium-current conditions. Its Zener voltage is specified with device junction in thermal equilibrium, ensuring repeatable VZ measurement across production lots.
It exhibits a temperature coefficient of +0.115 mV/°C (typical) at 110 V, low capacitance (<1 pF at 50% VZ), and ESD robustness rated Class 3 (>16 kV HBM), making it suitable for environments requiring transient immunity without external protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 104.5 V (min) to 115.5 V (max) @ IZT = 1.1 mA - defines tight 5% tolerance band for stable reference in high-voltage feedback networks |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous operating power before thermal derating begins |
| Zener Impedance (ZZT) | 750 Ω max @ IZT = 1.1 mA - indicates voltage regulation stability under small-signal AC perturbations |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 84 V - ensures minimal standby current in high-impedance bias or sensing paths |
| Thermal Resistance (RJA) | 340°C/W - determines junction temperature rise above ambient under steady-state power load |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into unshielded PCB layouts without added ESD protection |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - supports high-density placement and reflow-compatible automated assembly |
Pinout & Package
SOD−123 surface-mount plastic package with cathode indicated by polarity band; 2-terminal configuration optimized for compact board layout and thermal performance on FR−4/FR−5 substrates.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point in reverse-bias operation | Connected to regulated voltage node; polarity band identifies this terminal for correct orientation during placement |
| 2 (Anode) | Zener cathode connection point in reverse-bias operation | Typically tied to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW rating on FR−5 board | Enables use in space-constrained industrial power supplies without forced cooling or heatsinking |
| Wide Zener voltage range (2.4–110 V) | Supports single-family sourcing across diverse voltage reference needs, reducing BOM complexity |
| ESD rating >16 kV (HBM) | Eliminates need for discrete ESD protection in sensor interface and control signal lines |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements for automotive, industrial, and consumer end equipment |
| AEC−Q101 qualified (SZ prefix variant) | Validates reliability for automotive applications; MMSZ5272BT1G shares same die and process as qualified variants |
Applications
| Industrial Power Supply Feedback | High-Voltage Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback loops where primary-side sensing requires precise high-voltage reference. IC Role / Device Role / Timing Role: Zener diode providing stable 110 V reference to optocoupler input or TL431-like shunt regulator. Use Value: Maintains ±5% output regulation accuracy over temperature and line variations without trimming components. |
Use Scenario: Clamping and scaling analog outputs from high-voltage current sensors (e.g., 0–100 V range) before ADC input. IC Role / Device Role / Timing Role: Two-terminal voltage limiter protecting downstream op-amps and ADC front-ends from overvoltage transients. Use Value: Limits peak voltage to ≤115.5 V while drawing <0.1 µA leakage at 84 V, preserving signal integrity and power budget. |
| Programmable Logic Controller Input Protection | Telecom Line Interface Voltage Reference |
Use Scenario: Protecting digital input channels in PLC modules exposed to 100 V DC field wiring against surge and miswiring events. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between field terminal and input buffer IC. Use Value: Absorbs repetitive surges up to 1 W (per Figure 4) with no degradation, extending system MTBF. |
Use Scenario: Providing stable bias reference for line driver/receiver circuits in legacy telecom central office equipment operating at −48 V with positive supervision rails. IC Role / Device Role / Timing Role: Precision Zener reference generating +110 V supervision threshold for fault detection logic. Use Value: Delivers 110 V ±5% tolerance with <750 Ω dynamic impedance, enabling reliable fault flag assertion within 10 µs. |
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-C110LT1G | Same 110 V nominal Zener voltage, but 300 mW rating and SOT-23 package; higher ZZT (1000 Ω) and lower IZT (5 mA) | Lower power handling limits use in high-current clamping; smaller footprint trades thermal margin for density | Select when board space is critical and peak power remains <300 mW; verify thermal design with RJA = 450°C/W |
| SZMMSZ5272T1G | Identical electrical specs and SOD−123 package, but AEC−Q101 qualified and PPAP-capable with SZ prefix | Required for automotive applications; identical performance in industrial use but with extended traceability and change control | Choose for automotive designs or where long-term supply assurance and controlled manufacturing changes are mandatory |
Compared with MMSZ5272BT1G, BZX84-C110LT1G offers smaller size at reduced power and impedance performance, while SZMMSZ5272T1G delivers identical regulation with automotive-grade qualification-enabling drop-in substitution only where AEC−Q101 compliance is not required.
Availability
MMSZ5272BT1G is available at Aetrix Electronics and suitable for industrial power supplies, high-voltage sensor interfaces, programmable logic controller input protection, and telecom line supervision requiring stable component supply and long-lifecycle support.
Supply support for MMSZ5272BT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxxT1G series is part of onsemi's general-purpose Zener diode portfolio, designed specifically for cost-sensitive, high-volume applications requiring stable voltage regulation across wide temperature ranges and automated assembly compatibility.
FAQ
What is the Zener voltage tolerance of the MMSZ5272BT1G?
The MMSZ5272BT1G has a ±5% tolerance on its nominal 110 V Zener voltage, meaning the actual measured VZ falls between 104.5 V and 115.5 V when tested at IZT = 1.1 mA and with the device junction in thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official onsemi datasheet for MMSZ5272BT1G.
Does the MMSZ5272BT1G require heatsinking in standard PCB layouts?
No, the MMSZ5272BT1G does not require external heatsinking when operated within its 500 mW rating on FR−5 board at TL = 75°C. Its SOD−123 package provides sufficient thermal conduction via copper pads, and its 340°C/W junction-to-ambient thermal resistance allows safe operation up to ~85°C ambient with proper pad design. Derating begins above 75°C per the datasheet's 6.7 mW/°C slope.
Can the MMSZ5272BT1G be used as a replacement for older through-hole Zeners like 1N4764A?
Yes, the MMSZ5272BT1G is a direct surface-mount functional replacement for the 1N4764A (110 V, 1 W, DO-41), though with lower power rating (500 mW vs. 1 W) and tighter tolerance (±5% vs. ±5% for 1N4764A). Its SOD−123 footprint requires PCB redesign, but it offers superior ESD immunity (>16 kV HBM), Pb-free compliance, and automated assembly compatibility not found in legacy through-hole parts.
What is the maximum reverse leakage current for the MMSZ5272BT1G, and at what voltage is it specified?
The MMSZ5272BT1G has a maximum reverse leakage current (IR) of 0.1 µA, specified at VR = 84 V - which is 76% of its nominal 110 V Zener voltage. This value is documented in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the onsemi datasheet and reflects low standby power draw essential for battery-backed or high-impedance bias networks.
Is the MMSZ5272BT1G suitable for automotive applications?
The MMSZ5272BT1G itself is not AEC−Q101 qualified; however, its pin- and electrically identical counterpart SZMMSZ5272T1G is fully qualified for automotive use. Both share the same die, SOD−123 package, and electrical specifications. For automotive designs, engineers should specify SZMMSZ5272T1G to ensure PPAP compliance, controlled change management, and extended temperature validation per AEC−Q101.
MMSZ5272BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 750 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 84 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5272BT1G FAQ
1.How can I place an order for MMSZ5272BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5272BT1G 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 MMSZ5272BT1G reliable?
The price and inventory of MMSZ5272BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5272BT1G is usually 5 days.
3.What payment methods are accepted for MMSZ5272BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5272BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5272BT1G?
MMSZ5272BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5272BT1G 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 MMSZ5272BT1G?
For technical support, including MMSZ5272BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5272BT1G requirements.
6.How does Aetrix verify that MMSZ5272BT1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5272BT1G 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 MMSZ5272BT1G meets industry standards.
7.What is the process for return or replacement of MMSZ5272BT1G?
All MMSZ5272BT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5272BT1G, 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 MMSZ5272BT1G part is unused and in its original packaging.
Return procedure for MMSZ5272BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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