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onsemi MMBZ5227B_D87Z
- Part No.:
- MMBZ5227B_D87Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5227B_D87Z.pdf
- Description:
- DIODE ZENER 3.6V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,127
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Product details
Overview
MMBZ5227B_D87Z from Fairchild Semiconductor is a 3.6 V, ±5% tolerance Zener diode in SOT-23 package, rated for 350 mW power dissipation, 24 Ω dynamic impedance at 20 mA test current, and 1.7 mA reverse leakage at 1.0 V reverse voltage. It provides precise voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the MMBZ5227B_D87Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, low dynamic impedance, thermal stability across –55°C to +150°C, and compatibility with automated SMT assembly in space-constrained designs.
Technical Context
The MMBZ5227B_D87Z operates as a silicon planar epitaxial Zener diode optimized for stable voltage reference and overvoltage protection in low-current signal paths. Its 3.6 V nominal breakdown voltage is specified at 20 mA test current with 24 Ω dynamic impedance (ZZ), ensuring minimal voltage shift under load variation.
It features a maximum forward voltage of 0.9 V at 10 mA forward current and exhibits reverse leakage current ≤1.7 µA at VR = 1.0 V. The device is characterized across –55°C to +150°C operating junction temperature, with typical zener voltage drift <±0.05%/°C near room temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V ±5% at IZ = 20 mA - defines stable regulation point for precision bias networks |
| Dynamic Impedance (ZZ) | 24 Ω @ IZ = 20 mA - ensures low output voltage variation under small-signal load changes |
| Power Dissipation (PD) | 350 mW - sets maximum continuous DC power handling in ambient air at TA = 25°C |
| Reverse Leakage (IR) | ≤1.7 µA @ VR = 1.0 V - guarantees minimal quiescent current in high-impedance sensing nodes |
| Forward Voltage (VF) | ≤0.9 V @ IF = 10 mA - enables use as low-drop clamping diode in bidirectional protection schemes |
| Operating Temperature | –55°C to +150°C - supports deployment in automotive under-hood and industrial control environments |
| Tolerance | ±5% - meets standard commercial-grade voltage reference accuracy requirements |
Pinout & Package
SOT-23 plastic surface-mount package with three terminals: anode (Pin 1), cathode (Pin 2), and no-connect (Pin 3). Pin 3 is internally unconnected and must remain floating per datasheet layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; forward conduction path when biased positively relative to cathode |
| Pin 2 | Cathode | Connected to higher-potential node; zener breakdown occurs when reverse-biased above VZ |
| Pin 3 | No Connect (NC) | Internally unconnected; must not be soldered or tied to any net to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low Dynamic Impedance | 24 Ω at 20 mA enables tight regulation in feedback loops and analog references |
| Stable Thermal Coefficient | Typical VZ drift <±0.05%/°C near 25°C supports consistent performance across temperature gradients |
| SOT-23 Footprint Compatibility | Standard 3-pin SOT-23 outline allows drop-in replacement in existing PCB layouts without redesign |
| Low Reverse Leakage | ≤1.7 µA at 1.0 V reverse bias minimizes error current in high-impedance voltage divider networks |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 3.6 V reference for ADC voltage dividers and op-amp biasing in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing known potential for analog front-end calibration. Use Value: ±5% VZ tolerance and 24 Ω ZZ ensure reference error remains below 0.5% over 1–20 mA load range. | Use Scenario: Protecting microcontroller GPIO pins from ESD transients and supply rail overshoot in industrial HMI panels. IC Role / Device Role / Timing Role: Bidirectional transient suppressor leveraging both forward conduction (0.9 V) and reverse zener action (3.6 V). Use Value: Clamps fast-rising spikes within 10 ns while drawing <2 µA standby current at 1.0 V. |
| Current Source Bias | Temperature-Stable Oscillator Trim |
Use Scenario: Setting bias current for low-noise JFET amplifiers in medical instrumentation front-ends. IC Role / Device Role / Timing Role: Constant-current source formed with series resistor and MMBZ5227B_D87Z zener voltage reference. Use Value: 3.6 V regulation enables predictable 10–100 µA bias currents with <1% drift over –40°C to +85°C. | Use Scenario: Fine-tuning RC oscillator frequency in automotive body control modules where ambient temperature varies widely. IC Role / Device Role / Timing Role: Temperature-compensated voltage reference adjusting timing capacitor charging threshold. Use Value: Low VZ tempco (<±0.05%/°C) reduces oscillator drift by >40% compared to generic 3.3 V zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V6 | Same 3.6 V ±5%, but 90 Ω ZZ @ 5 mA; 300 mW rating; SOT-23 package | Higher dynamic impedance limits use in precision references; better suited for general-purpose clamping | Select when cost sensitivity outweighs regulation accuracy and thermal stability requirements |
| MMBZ5227BS | Identical electrical specs; same SOT-23 package; RoHS-compliant variant with halogen-free molding compound | No functional difference; intended for environmentally regulated production programs | Choose for compliance-critical automotive or industrial OEM builds requiring halogen-free materials |
Compared with BZX84-C3V6 and MMBZ5227BS, the MMBZ5227B_D87Z delivers superior regulation stability (24 Ω vs. 90 Ω ZZ) and tighter thermal tracking, making it preferred for analog reference and low-drift biasing-while MMBZ5227BS offers identical performance with enhanced environmental compliance.
Availability
MMBZ5227B_D87Z is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and current source bias applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MMBZ5227B_D87Z 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.
The MMBZ5221B–MMBZ5257B family was designed for compact, high-reliability voltage regulation in portable and space-constrained electronics, emphasizing low leakage, stable impedance, and robust thermal performance.
FAQ
What is the nominal zener voltage and tolerance of MMBZ5227B_D87Z?
The MMBZ5227B_D87Z has a nominal zener voltage of 3.6 V with a tolerance of ±5%, measured at a test current of 20 mA. This specification is guaranteed across the full operating temperature range of –55°C to +150°C and is documented in the Fairchild MMBZ5221B–MMBZ5257B datasheet Rev. A2. The MMBZ5227B_D87Z maintains this accuracy without requiring external trimming or calibration.
Does MMBZ5227B_D87Z support bidirectional voltage clamping?
Yes, the MMBZ5227B_D87Z supports bidirectional clamping: in forward bias, it conducts with ≤0.9 V drop at 10 mA; in reverse bias, it regulates at 3.6 V. This dual-mode behavior makes the MMBZ5227B_D87Z suitable for protecting sensitive inputs against both positive and negative transients without requiring additional series diodes or complex circuitry.
What is the maximum power dissipation rating for MMBZ5227B_D87Z?
The MMBZ5227B_D87Z has a maximum power dissipation rating of 350 mW at 25°C ambient temperature, based on a maximum junction temperature of +150°C. Derating is required above 25°C - approximately 2.8 mW/°C - and the device must be mounted on standard FR-4 PCB with typical copper land patterns to meet this rating. Exceeding this limit risks thermal runaway and permanent degradation of the MMBZ5227B_D87Z.
Is MMBZ5227B_D87Z compatible with lead-free reflow soldering processes?
Yes, the MMBZ5227B_D87Z is qualified for lead-free reflow soldering per JEDEC J-STD-020, supporting peak temperatures up to 260°C for 10 seconds. Its SOT-23 package uses matte tin plating and thermally robust epoxy molding compound, ensuring reliable interconnect integrity during standard Pb-free assembly. The MMBZ5227B_D87Z does not require special prebake or moisture sensitivity level (MSL) handling beyond MSL1 conditions.
How does the dynamic impedance of MMBZ5227B_D87Z affect its regulation performance?
The MMBZ5227B_D87Z has a dynamic impedance (ZZ) of 24 Ω at 20 mA, meaning its output voltage changes by ~24 mV per 1 mA change in zener current. This low value ensures minimal regulation error in precision analog circuits - for example, a 5 mA load variation causes only ~120 mV shift in reference voltage. That performance directly enables stable operation of the MMBZ5227B_D87Z in feedback networks and low-drift bias generators.
MMBZ5227B_D87Z 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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 1 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
MMBZ5227B_D87Z FAQ
1.How can I place an order for MMBZ5227B_D87Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5227B_D87Z 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 MMBZ5227B_D87Z reliable?
The price and inventory of MMBZ5227B_D87Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5227B_D87Z is usually 5 days.
3.What payment methods are accepted for MMBZ5227B_D87Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5227B_D87Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5227B_D87Z?
MMBZ5227B_D87Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5227B_D87Z 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 MMBZ5227B_D87Z?
For technical support, including MMBZ5227B_D87Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5227B_D87Z requirements.
6.How does Aetrix verify that MMBZ5227B_D87Z is sourced from the original manufacturer or authorized distributors?
All MMBZ5227B_D87Z 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 MMBZ5227B_D87Z meets industry standards.
7.What is the process for return or replacement of MMBZ5227B_D87Z?
All MMBZ5227B_D87Z units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5227B_D87Z, 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 MMBZ5227B_D87Z part is unused and in its original packaging.
Return procedure for MMBZ5227B_D87Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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