My Inquiry
My Account
Diodes Incorporated MMBZ5226B-7-F
- Part No.:
- MMBZ5226B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5226B-7-F.pdf
- Description:
- DIODE ZENER 3.3V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:24,269
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5226B-7-F from Diodes Incorporated is a 3.3 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current with 28 Ω dynamic impedance at 1 kHz and 25 µA reverse leakage at 1.0 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5226B-7-F datasheet, MMBZ5226B-7-F pinout, MMBZ5226B-7-F application, or MMBZ5226B-7-F equivalent, key selection criteria include zener voltage tolerance (±3.6%), thermal resistance (357 °C/W on FR-4), JEDEC-compliant reliability, and RoHS/Green compliance for space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low parameter drift across production lots.
Designed for automated SMT assembly, it delivers predictable regulation down to 0.25 mA knee current (ZZK = 1600 Ω) and supports operation from –65 °C to +150 °C ambient, with power derating above +25 °C per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.14–3.47 V range at IZT = 20 mA - defines tight regulation window for 3.3 V rail clamping |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous dissipation without heatsinking |
| Zener Impedance (ZZT) | 28 Ω at f = 1 kHz, IZT = 20 mA - indicates low AC impedance for stable reference under ripple |
| Reverse Leakage (IR) | 25 µA at VR = 1.0 V - confirms minimal standby current in undervoltage detection circuits |
| Thermal Resistance (RθJA) | 357 °C/W - determines junction temperature rise under load; requires thermal pad layout per Diodes' outline |
| Operating Temperature | –65 °C to +150 °C - enables use in industrial and automotive under-hood environments |
Pinout & Package
Package: SOT23 - 3-terminal surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground when used as shunt regulator; defines polarity for reverse-bias operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input rail; maintains 3.3 V relative to anode during breakdown conduction |
| No-Connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves structural role in SOT23 mold compound; must remain unconnected in layout |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and low parametric shift over life |
| 350 mW dissipation on FR-4 | Enables direct integration into standard PCBs without thermal vias or copper pours |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br+Cl and <1000 ppm Sb - suitable for export-sensitive designs |
| SOT23 footprint compatibility | Supports high-speed pick-and-place with industry-standard tape-and-reel (3,000 pcs/reel) |
Applications
| Power Supply Rail Clamping | ADC Reference Stabilization |
|---|---|
|
Use Scenario: Clamp 3.3 V logic supply against transient overvoltage events in microcontroller-based sensor nodes. IC Role / Device Role / Timing Role: Shunt regulator that conducts excess current when rail exceeds 3.47 V, protecting downstream LDOs and I/O pins. Use Value: Prevents latch-up and ESD damage with 25 µA leakage at 1.0 V, minimizing quiescent power penalty. |
Use Scenario: Provide stable 3.3 V reference for 12-bit SAR ADC in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-impedance voltage reference source with 28 Ω dynamic impedance, reducing code spread due to supply ripple. Use Value: Enables ±0.5 LSB accuracy by limiting reference deviation to <15 mV over 0–20 mA load variation. |
| ESD Protection Interface | Low-Voltage Threshold Detection |
|
Use Scenario: Protect USB-C CC line inputs from ±8 kV contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Fast-response clamping diode placed between signal line and ground, conducting within nanoseconds of overvoltage onset. Use Value: Limits peak voltage to ≤3.47 V using 3.3 V Zener knee, preserving signal integrity without adding series resistance. |
Use Scenario: Detect brownout condition in 3.3 V FPGA configuration circuits before power-on reset timeout. IC Role / Device Role / Timing Role: Precision threshold element in comparator bias network, triggering reset when VCC falls below 3.14 V. Use Value: Guarantees deterministic reset assertion with ±3.6% voltage tolerance, eliminating false triggers from supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3 | Same 3.3 V nominal, but 300 mW rating and higher ZZT (60 Ω); SOT23 package with different marking and thermal profile | Lower power margin and higher impedance reduce stability in precision references | Select only if legacy BOM alignment required; verify thermal derating on FR-4 |
| MMBZ5226BS-7-F | Same electrical specs, but SOD-323 package (smaller footprint, higher RθJA = 450 °C/W) | Higher thermal resistance limits continuous current in high-ambient environments | Prefer for ultra-dense layouts where board area is critical and power < 200 mW |
Compared with BZX84-C3V3 and MMBZ5226BS-7-F, MMBZ5226B-7-F offers superior thermal performance (357 °C/W) and lower dynamic impedance (28 Ω), making it optimal for stable 3.3 V regulation in industrial-grade PCBs where reliability and repeatability are prioritized over minimal footprint.
Availability
MMBZ5226B-7-F is available at Aetrix Electronics and suitable for power supply rail clamping, ADC reference stabilization, and low-voltage threshold detection requiring stable component supply across industrial control, sensor interface, and embedded computing programs.
Supply support for MMBZ5226B-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and consumer markets.
This device belongs to the MMBZ52xxB family of 350 mW Zener diodes designed specifically for space-constrained, high-volume SMT applications demanding tight voltage tolerance and JEDEC-compliant robustness.
FAQ
What is the maximum continuous Zener current for MMBZ5226B-7-F at 25°C ambient?
The device supports up to 20 mA continuous Zener current at TA = +25°C, corresponding to its 350 mW power rating (P = VZ × IZ ≈ 3.3 V × 20 mA = 66 mW). Full 350 mW dissipation requires derating above 25°C per Figure 1, reaching zero power at ~150°C ambient.
Does MMBZ5226B-7-F meet AEC-Q200 requirements for automotive use?
No - this part is not AEC-Q200 qualified. Diodes offers automotive-grade equivalents with Q-suffix (e.g., MMBZ5226BQ-7-F), which undergo PPAP, change control, and manufacturing in IATF 16949-certified facilities. Standard MMBZ5226B-7-F is intended for industrial and commercial applications.
How does the SOT23 pinout differ between MMBZ5226B-7-F and other Zener families?
MMBZ5226B-7-F follows standard SOT23 pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC. This matches BZX84, MM3Z, and SMBZ families. Unlike TO-236AB or SOD-123 packages, SOT23 provides consistent orientation for automated placement and avoids ambiguity in cathode identification.
Can MMBZ5226B-7-F be used in parallel for higher power handling?
No - Zener diodes should not be paralleled due to mismatched breakdown voltages causing current hogging. Even devices from the same reel exhibit ±3.6% VZ tolerance, leading to unequal current sharing and thermal runaway. For >350 mW, use a single higher-power device like 1N4728A (3.3 V, 1 W) in DO-41 package.
MMBZ5226B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 1 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
MMBZ5226B-7-F FAQ
1.How can I place an order for MMBZ5226B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5226B-7-F 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 MMBZ5226B-7-F reliable?
The price and inventory of MMBZ5226B-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5226B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5226B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5226B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5226B-7-F?
MMBZ5226B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5226B-7-F 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 MMBZ5226B-7-F?
For technical support, including MMBZ5226B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5226B-7-F requirements.
6.How does Aetrix verify that MMBZ5226B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5226B-7-F 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 MMBZ5226B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5226B-7-F?
All MMBZ5226B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5226B-7-F, 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 MMBZ5226B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5226B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5226B-7-F 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
