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Diodes Incorporated MMBZ5230B-7-F
- Part No.:
- MMBZ5230B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5230B-7-F.pdf
- Description:
- DIODE ZENER 4.7V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,014
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Product details
Overview
MMBZ5230B-7-F from Diodes Incorporated is a 4.7 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current with 19 Ω dynamic impedance at 1 kHz and 5.0 µA reverse leakage at 2.0 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMBZ5230B-7-F datasheet, MMBZ5230B-7-F pinout, MMBZ5230B-7-F application, or MMBZ5230B-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (357 °C/W), JEDEC-compliant reliability, and compatibility with automated SMT assembly on FR-4 PCBs.
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 low-current regulation tasks, it delivers 4.7 V nominal zener voltage with ±5% tolerance (4.47–4.94 V), 19 Ω zener impedance at 20 mA, and exhibits only 5.0 µA reverse leakage at VR = 2.0 V - enabling accurate clamping in signal conditioning and power rail supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.47–4.94 V range at IZT = 20 mA - defines precise clamping threshold for 5 V rail protection |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous dissipation without heatsinking |
| Zener Impedance (ZZT) | 19 Ω at f = 1 kHz, IZT = 20 mA - determines voltage regulation stiffness under dynamic load changes |
| Reverse Leakage (IR) | 5.0 µA at VR = 2.0 V - ensures minimal quiescent current draw in standby monitoring circuits |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal design on standard PCB layout |
| Operating Temperature | −65 °C to +150 °C - supports industrial and automotive under-hood environments without derating |
Pinout & Package
Package: SOT23 - surface-mount, 3-terminal plastic package with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to circuit ground or lower-potential node during zener operation; enables standard orientation in voltage clamp topology |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to protected node (e.g., IC supply rail); reverse-biased to establish stable 4.7 V reference |
| No Connection (Pin 3) | Non-functional leadframe tie-bar | Internally unconnected; must remain floating - no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight parametric distribution and long-term stability of VZ across temperature and life cycles |
| 350 mW dissipation on FR-4 | Enables direct integration into space-constrained PCBs without external heat sinking or thermal vias |
| JEDEC High Reliability qualification | Validated for mission-critical applications including industrial control and automotive subsystems |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports green manufacturing |
| SOT23 tape-and-reel packaging | Optimized for high-speed pick-and-place assembly; 3,000 units per reel (7-F suffix) |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing 4.7 V bias to op-amp input stage and ADC reference divider network. Use Value: Maintains ±0.2% full-scale accuracy over −40 °C to +85 °C due to low ZZT and tight VZ tolerance. |
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting VBUS to ≤4.94 V before USB PHY damage occurs. Use Value: Responds within nanoseconds to ESD pulses (IEC 61000-4-2 Level 4) while drawing <5 µA standby current. |
| Low-Power Microcontroller Reset Circuit | Automotive Cabin Control Panel Supply Rail Clamp |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering reset IC when 3.3 V rail drops below 2.9 V threshold. Use Value: Delivers predictable turn-on hysteresis via series resistor, eliminating need for dedicated supervisor IC. |
Use Scenario: Protecting infotainment display backlight driver IC from battery voltage spikes during load dump. IC Role / Device Role / Timing Role: Parallel clamp on 5 V logic rail, diverting excess energy to ground during 12 V system transients. Use Value: Withstands 350 mW peak pulse energy without degradation; qualified per AEC-Q200 requirements via Q-suffix variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V7 | Same 4.7 V nominal, but 300 mW rating and higher ZZT (40 Ω); SOT23 package with different marking scheme | Limited to lower-power clamping where thermal margin is tighter; not JEDEC High Reliability qualified | Prefer MMBZ5230B-7-F for designs requiring guaranteed 350 mW operation or industrial temperature compliance |
| MM3Z4V7 | 4.7 V, 200 mW, SOD-323 package; smaller footprint but 50% lower power rating and 25 Ω ZZT | Suitable only for ultra-low-current references (<5 mA); unsuitable for rail-clamp duty with >10 mA surge current | Select MMBZ5230B-7-F when board-level thermal management or higher surge immunity is required |
Compared with BZX84-C4V7 and MM3Z4V7, MMBZ5230B-7-F offers superior thermal capability (350 mW vs. 300/200 mW), lower dynamic impedance (19 Ω), and formal JEDEC High Reliability qualification - making it optimal for industrial and automotive-adjacent designs demanding robustness and long-term stability.
Availability
MMBZ5230B-7-F is available at Aetrix Electronics and suitable for industrial sensor nodes, USB peripheral protection circuits, and microcontroller reset systems requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for MMBZ5230B-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, computing, and automotive markets.
MMBZ5230B-7-F belongs to the MMBZ52xxB Zener diode family, engineered for precision voltage reference and transient suppression in space-constrained, high-volume SMT applications.
FAQ
What is the maximum continuous zener current for MMBZ5230B-7-F at 25°C ambient?
The device is rated for 20 mA test current (IZT), but maximum continuous current depends on thermal design. At TA = 25°C on FR-4 with recommended pad layout, 350 mW power limit allows up to ~74 mA (350 mW ÷ 4.7 V), though derating per Fig. 1 applies above 25°C.
Does MMBZ5230B-7-F meet AEC-Q200 requirements for automotive use?
Standard MMBZ5230B-7-F is not AEC-Q200 qualified; however, Diodes offers automotive-grade variants with Q-suffix (e.g., MMBZ5230BQ-7-F) manufactured in IATF 16949-certified facilities and PPAP-capable, as listed on their automotive products page.
Can MMBZ5230B-7-F be used in place of a 5.1 V Zener like MMBZ5231B?
No - its 4.7 V nominal zener voltage (4.47–4.94 V) is outside the 4.85–5.36 V range of MMBZ5231B. Substituting would cause incorrect clamping or reference levels; voltage-specific selection is mandatory for functional correctness.
What is the significance of the "-7-F" suffix in the part number?
"-7-F" denotes tape-and-reel packaging: 3,000 units per 7-inch reel, with lead-free (F) finish. It does not affect electrical parameters - all MMBZ5230B variants share identical zener characteristics regardless of suffix.
MMBZ5230B-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
MMBZ5230B-7-F FAQ
1.How can I place an order for MMBZ5230B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5230B-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 MMBZ5230B-7-F reliable?
The price and inventory of MMBZ5230B-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 MMBZ5230B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5230B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5230B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5230B-7-F?
MMBZ5230B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5230B-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 MMBZ5230B-7-F?
For technical support, including MMBZ5230B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5230B-7-F requirements.
6.How does Aetrix verify that MMBZ5230B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5230B-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 MMBZ5230B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5230B-7-F?
All MMBZ5230B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5230B-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 MMBZ5230B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5230B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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