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onsemi MMBZ5267BLT1G
- Part No.:
- MMBZ5267BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5267BLT1G.pdf
- Description:
- DIODE ZENER 75V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,930
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Product details
Overview
MMBZ5267BLT1G from onsemi is a 75 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 nominal Zener voltage of 75 V at 1.7 mA test current, with dynamic impedance of 1700 Ω at IZT, and operates across −65 °C to +150 °C junction temperature range. It is used in portable power rails, ESD-sensitive analog front-ends, and voltage reference clamping in handheld electronics.
For engineers reviewing the MMBZ5267BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 75 V nominal Zener voltage, 1700 Ω dynamic impedance at 1.7 mA, SOT-23 anode–cathode pinout, Class 3 (≥16 kV HBM) ESD rating, and FR-5 board power derating profile.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its Zener voltage is specified at IZT = 1.7 mA with ±5% tolerance (71.25–78.75 V), and exhibits a positive temperature coefficient above ~5 V, typical for higher-voltage Zeners. The no-connect (NC) pin (Pin 2) isolates internal construction from external circuitry.
Thermal performance is defined for both FR-5 board (RJA = 556 °C/W, 225 mW @ 25 °C) and alumina substrate (RJA = 417 °C/W, 300 mW @ 25 °C). Reverse leakage remains ≤0.1 µA at VR = 56 V, supporting low-power standby regulation integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 75 V at IZT = 1.7 mA - stable regulation point for high-voltage rail clamping |
| Zener Voltage Range | 71.25 V to 78.75 V - ensures design margin for 5% tolerance in production |
| Dynamic Impedance | 1700 Ω at IZT - defines output impedance under regulation, critical for ripple rejection |
| Power Dissipation | 225 mW on FR-5 board - sets maximum continuous DC power before thermal derating |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct placement on I/O lines without external ESD protection |
| Junction Temp Range | −65 °C to +150 °C - supports operation in automotive under-hood and industrial ambient environments |
| Reverse Leakage | ≤0.1 µA at VR = 56 V - guarantees minimal quiescent current in battery-powered standby modes |
Pinout & Package
SOT-23 (TO-236) package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish. Cathode indicated by polarity band. Compatible with standard reflow profiles (260 °C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| Pin 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| Pin 3 | Cathode | Connected to regulated voltage node; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free, RoHS Compliant | Fulfills global environmental compliance without compromising solderability or reliability |
| 225 mW FR-5 Power Rating | Enables compact voltage clamping in high-density PCBs without heatsinking |
| Class 3 ESD Protection | Eliminates need for discrete TVS in many I/O protection schemes |
| Small SOT-23 Footprint | Reduces board area by >50% vs. DO-35, easing layout in portable designs |
| Wide Operating Temperature | Supports deployment in extended-temperature industrial and automotive modules |
Applications
| Cellular Baseband Power Rail Clamping | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 75 V bias supply in RF power amplifier stages from transient overvoltage events. IC Role / Device Role / Timing Role: Zener clamp limiting voltage excursions to prevent gate oxide damage in GaN FET drivers. Use Value: 75 V nominal Zener voltage matches system rail tolerance; 1700 Ω impedance ensures predictable clamping knee without oscillation. | Use Scenario: Stabilizing reference voltage for 24-bit delta-sigma ADCs in precision weigh scales. IC Role / Device Role / Timing Role: Low-leakage (≤0.1 µA) voltage reference shunt maintaining accuracy during microamp-level sleep modes. Use Value: Sub-µA leakage preserves measurement integrity; wide temp range ensures calibration stability across factory floor conditions. |
| Automotive Infotainment Display Backlight Control | Medical Portable Ultrasound Front-End Biasing |
Use Scenario: Regulating LED driver IC supply in AEC-Q101-compliant infotainment head units. IC Role / Device Role / Timing Role: Voltage reference for current-sense feedback loop in constant-current LED drivers. Use Value: AEC-Q101 qualification and −65 °C to +150 °C operation ensure reliability in vehicle cabin thermal cycling. | Use Scenario: Providing stable bias to high-gain transimpedance amplifiers in ultrasound probe signal chains. IC Role / Device Role / Timing Role: Low-noise voltage clamp preventing saturation during high-slew-rate echo bursts. Use Value: 1700 Ω dynamic impedance minimizes noise injection into sensitive analog paths; Class 3 ESD protects against handling-induced discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C75LT1G | Same 75 V nominal Zener, but 300 mW rating on FR-4 and higher leakage (≤5 µA @ 60 V) | Higher power dissipation suits higher-current regulation; less suitable for ultra-low-leakage standby | Select when board thermal mass supports 300 mW and leakage budget allows ≥5 µA |
| SZMMBZ5267BLT1G | Identical electrical specs, but AEC-Q101 qualified with PPAP capability and unique site control | Required for automotive production programs needing full automotive traceability and change control | Select for Tier 1 automotive BOMs where PPAP documentation and controlled manufacturing sites are mandatory |
Compared with MMBZ5267BLT1G, BZX84-C75LT1G offers higher power handling but looser leakage control, while SZMMBZ5267BLT1G provides identical regulation performance with automotive-grade process controls and documentation-neither is pin-compatible due to differing marking and qualification scope, though all share SOT-23 footprint and Pin 1/3 anode/cathode assignment.
Availability
MMBZ5267BLT1G is available at Aetrix Electronics and suitable for cellular phone power management, industrial sensor signal conditioning, and medical portable device biasing requiring stable component supply across long product lifecycles.
Supply support for MMBZ5267BLT1G 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 supplier of energy-efficient semiconductor solutions, serving automotive, industrial, cloud, medical, and IoT markets with focus on reliability and sustainability.
The MMBZ52xxBLT1G series is part of onsemi's precision Zener regulator portfolio, engineered for space-constrained, high-reliability voltage reference and overvoltage protection in portable and harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of MMBZ5267BLT1G?
The MMBZ5267BLT1G has a nominal Zener voltage of 75 V with a tolerance of ±5%, resulting in a guaranteed range of 71.25 V to 78.75 V at IZT = 1.7 mA and TA = 25 °C. This tolerance is verified per onsemi's production testing and applies across the full rated junction temperature range when derated per thermal specifications. MMBZ5267BLT1G maintains this specification without requiring external trimming or calibration.
Does MMBZ5267BLT1G have a built-in ESD protection rating?
Yes, MMBZ5267BLT1G is rated Class 3 per Human Body Model (HBM) with ESD withstand capability exceeding 16 kV. This rating is validated per JEDEC JS-001 and is intrinsic to the device structure-not dependent on PCB layout or external components. The ESD robustness makes MMBZ5267BLT1G suitable for direct integration on exposed I/O lines in handheld devices, reducing system-level protection component count. MMBZ5267BLT1G retains this rating across its full operating temperature range.
What is the function of Pin 2 on MMBZ5267BLT1G?
Pin 2 of MMBZ5267BLT1G is a no-connection (NC) terminal-internally unconnected and electrically isolated from the Zener junction. It must remain unconnected on the PCB; routing traces or placing solder pads to Pin 2 may cause mechanical stress or unintended coupling. This NC configuration is consistent across the MMBZ52xxBLT1G series and is documented in onsemi's mechanical outline (Style 8). MMBZ5267BLT1G relies solely on Pin 1 (anode) and Pin 3 (cathode) for operation.
Can MMBZ5267BLT1G be used on FR-4 boards?
MMBZ5267BLT1G is characterized and rated for use on FR-5 boards (1.0 × 0.75 × 0.62 in), delivering 225 mW at 25 °C. While commonly mounted on FR-4 in practice, its published thermal resistance (RJA = 556 °C/W) and power derating curve apply specifically to FR-5. For FR-4, thermal performance may vary based on copper area and layer stack-up; users should validate temperature rise empirically. MMBZ5267BLT1G remains functional on FR-4 but requires thermal validation for each specific layout. Derating guidelines from the datasheet assume FR-5 mounting.
Is MMBZ5267BLT1G suitable for automotive applications?
Standard MMBZ5267BLT1G is not AEC-Q101 qualified. For automotive use, the SZMMBZ5267BLT1G variant must be selected-it shares identical electrical specs but includes AEC-Q101 qualification, PPAP capability, and controlled manufacturing site requirements. MMBZ5267BLT1G is intended for commercial and industrial applications; substituting it in automotive systems without qualification may violate OEM compliance requirements. Always verify part number suffix and qualification status before release into automotive BOMs. MMBZ5267BLT1G itself does not carry automotive certification.
MMBZ5267BLT1G 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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 270 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 56 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)
MMBZ5267BLT1G FAQ
1.How can I place an order for MMBZ5267BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5267BLT1G 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 MMBZ5267BLT1G reliable?
The price and inventory of MMBZ5267BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5267BLT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5267BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5267BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5267BLT1G?
MMBZ5267BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5267BLT1G 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 MMBZ5267BLT1G?
For technical support, including MMBZ5267BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5267BLT1G requirements.
6.How does Aetrix verify that MMBZ5267BLT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5267BLT1G 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 MMBZ5267BLT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5267BLT1G?
All MMBZ5267BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5267BLT1G, 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 MMBZ5267BLT1G part is unused and in its original packaging.
Return procedure for MMBZ5267BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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