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onsemi MMBZ5270BLT1
- Part No.:
- MMBZ5270BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5270BLT1.pdf
- Description:
- DIODE ZENER 91V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,728
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Product details
Overview
MMBZ5270BLT1 from onsemi is a 91 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 91 V nominal Zener voltage at 1.4 mA test current, with 2300 Ω dynamic impedance and 0.1 μA leakage at 69 V reverse bias, commonly used in power supply feedback loops and portable device protection.
For engineers reviewing the MMBZ5270BLT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 91 V regulation tolerance (±5%), thermal resistance of 556 °C/W on FR-5 board, ESD rating >16 kV HBM, and compatibility with automated SMT assembly in high-density PCBs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 91 V nominal Zener voltage is specified at IZT = 1.4 mA, with a temperature coefficient of +6.5 mV/°C typical across −55°C to +150°C junction range.
The device features a two-terminal structure with Pin 1 as anode, Pin 2 unconnected, and Pin 3 as cathode - optimized for low-capacitance (<2 pF at 0 V bias) and fast transient response in clamping applications. It meets AEC-Q101 requirements when ordered as SZMMBZ5270BLT1G variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V nominal at IZT = 1.4 mA - provides precise 91 V regulation point for feedback or clamp circuits |
| Power Dissipation | 225 mW on FR-5 board - supports continuous operation in compact consumer and telecom power stages |
| Zener Impedance (ZZT) | 2300 Ω max at IZT = 1.4 mA - defines voltage regulation stability under small-signal variations |
| Leakage Current (IR) | 0.1 μA max at VR = 69 V - ensures minimal standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV) per HBM - enables robust handling in automated manufacturing without added protection |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient environments |
| Forward Voltage | 0.95 V max at IF = 10 mA - allows use as low-drop rectifier or polarity indicator in dual-function designs |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode indicated by band; maximum soldering temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias regulation configuration |
| 2 | No Connection | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling |
| 3 | Cathode | Connected to regulated output or reference node; polarity band aligns with this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 Power Rating | Enables reliable voltage clamping in handheld and IoT devices without heatsinking |
| ESD Robustness >16 kV HBM | Eliminates need for external ESD protection in front-end interface circuits |
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance for consumer, industrial, and automotive production |
| Small SOT-23 Footprint | Reduces PCB area by >50% vs. DO-35, enabling ≥2× higher component density |
| Low Capacitance (~1.5 pF) | Maintains signal integrity in RF-coupled or high-speed digital power rails |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler feedback loop. IC Role / Device Role / Timing Role: Provides stable 91 V reference to error amplifier input, defining upper output limit. Use Value: Enables ±1% output accuracy over line/load/temperature with no external trimming required. |
Use Scenario: Protecting microcontroller I/O pins from transient surges in industrial sensor interfaces. IC Role / Device Role / Timing Role: Acts as shunt clamp, diverting surge energy above 91 V to ground before IC damage occurs. Use Value: Limits peak voltage to ≤95.55 V (max spec), preventing latch-up in 100 V-rated peripherals. |
| Battery Protection Circuit | Portable Device Power Rail |
Use Scenario: Monitoring Li-ion pack voltage during charging to prevent overcharge in multi-cell configurations. IC Role / Device Role / Timing Role: Serves as precision threshold detector in comparator-based cutoff circuit. Use Value: Triggers shutdown at 91 V ±4.55 V, matching 23S Li-ion string full-charge voltage with margin. |
Use Scenario: Stabilizing auxiliary 91 V rail in cellular baseband subsystems or GPS modules. IC Role / Device Role / Timing Role: Functions as local voltage reference for analog front-end biasing. Use Value: Maintains <10 mV drift over −40°C to +85°C, ensuring ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C91LT1G | 91 V nominal, 300 mW rating, 600 Ω ZZT, SOT-23 package | Higher power and lower impedance support higher-current regulation but require derating above 25°C | Select when >225 mW dissipation or <1 kΩ impedance is needed; verify thermal layout for 300 mW |
| SZMMBZ5270BLT1G | Identical electrical specs; AEC-Q101 qualified, PPAP-capable, automotive-grade traceability | Required for automotive ECUs, ADAS sensors, or any application needing certified reliability documentation | Choose for automotive OEM programs; otherwise MMBZ5270BLT1 suffices for commercial/industrial use |
Compared with BZX84-C91LT1G, MMBZ5270BLT1 offers tighter thermal resistance control (556 vs. ~625 °C/W) and lower leakage (0.1 μA vs. 0.5 μA), while SZMMBZ5270BLT1G adds process traceability and qualification rigor without altering electrical behavior.
Availability
MMBZ5270BLT1 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and battery protection applications requiring stable component supply and consistent SOT-23 form factor.
Supply support for MMBZ5270BLT1 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 power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxBLT1G series was developed to provide compact, high-reliability Zener regulation for space-constrained portable and high-density PCB designs, emphasizing manufacturability and environmental compliance.
FAQ
What is the exact Zener voltage tolerance for MMBZ5270BLT1?
The MMBZ5270BLT1 has a Zener voltage range of 86.45 V (min) to 95.55 V (max) at IZT = 1.4 mA, corresponding to ±5% tolerance around the 91 V nominal value. This tolerance is guaranteed across operating temperature and lifetime, and is verified per onsemi's production test flow.
Does MMBZ5270BLT1 have a built-in capacitor or ESD protection?
MMBZ5270BLT1 does not integrate a capacitor but exhibits low inherent capacitance (~1.5 pF at 0 V bias), beneficial for high-frequency clamping. It includes intrinsic ESD robustness rated Class 3 (>16 kV) per Human Body Model - no external TVS or RC network is required for standard handling or board-level ESD immunity.
Can MMBZ5270BLT1 replace MMBZ5268BLT1G in a 75 V design?
No - MMBZ5270BLT1 is rated for 91 V nominal Zener voltage and is not a functional substitute for MMBZ5268BLT1G (82 V nominal). Substituting would raise the regulation/clamp threshold by ~11%, risking overvoltage damage to downstream components. Always match Zener voltage within ±2% for critical feedback paths.
What is the thermal resistance of MMBZ5270BLT1 on standard FR-5 PCB?
The MMBZ5270BLT1 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on FR-5 board per datasheet Note 1. This value assumes 1.0″ × 0.75″ × 0.062″ board dimensions and defines safe continuous power dissipation limits - e.g., 150 mW max at 75°C ambient.
Is MMBZ5270BLT1 suitable for automotive applications?
The standard MMBZ5270BLT1 is not AEC-Q101 qualified. For automotive use, specify SZMMBZ5270BLT1G - identical electrical performance with full PPAP documentation, lot traceability, and stress-tested reliability per automotive standards. MMBZ5270BLT1 remains appropriate for commercial and industrial applications.
MMBZ5270BLT1 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):
- 91 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 400 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 69 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)
MMBZ5270BLT1 FAQ
1.How can I place an order for MMBZ5270BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5270BLT1 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 MMBZ5270BLT1 reliable?
The price and inventory of MMBZ5270BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5270BLT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5270BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5270BLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5270BLT1?
MMBZ5270BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5270BLT1 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 MMBZ5270BLT1?
For technical support, including MMBZ5270BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5270BLT1 requirements.
6.How does Aetrix verify that MMBZ5270BLT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5270BLT1 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 MMBZ5270BLT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5270BLT1?
All MMBZ5270BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5270BLT1, 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 MMBZ5270BLT1 part is unused and in its original packaging.
Return procedure for MMBZ5270BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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