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Diodes Incorporated MMSZ5230B-7
- Part No.:
- MMSZ5230B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5230B-7.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,808
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Product details
Overview
MMSZ5230B-7 from Diodes Incorporated is a 4.7 V, 500 mW surface-mount Zener diode in SOD123 package, rated for 20 mA test current, 19 Ω dynamic impedance at 1 kHz, and 5.0 µA reverse leakage at 2.0 V, widely used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5230B-7 datasheet, MMSZ5230B-7 pinout, MMSZ5230B-7 application, or MMSZ5230B-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (338 °C/W), power derating above +25°C, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and supply fluctuations. It exhibits a temperature coefficient of approximately +0.03 %/°C near 4.7 V and supports pulse operation with minimal self-heating under short-duration 20 mA test conditions.
Designed for general-purpose voltage clamping and reference functions, it delivers consistent regulation from 0.25 mA to 20 mA, with maximum reverse leakage of 5.0 µA at VR = 2.0 V and typical capacitance below 30 pF - enabling use in noise-sensitive signal conditioning paths.
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 - ensures ±5% regulation tolerance in precision biasing. |
| Power Dissipation | 370 mW at TA = +25°C - defines maximum continuous DC power on standard FR-4 PCB with 1-inch copper pad. |
| Zener Impedance (ZZT) | 19 Ω at f = 1 kHz and IZT = 20 mA - determines output voltage stability under dynamic load changes. |
| Reverse Leakage (IR) | 5.0 µA max at VR = 2.0 V - critical for low-current standby circuits where quiescent power must be minimized. |
| Thermal Resistance (RθJA) | 338 °C/W - indicates junction-to-ambient heat transfer efficiency; requires thermal pad layout per Diodes' SOD123 recommendation. |
| Operating Temperature | −65°C to +150°C - enables deployment in extended industrial and automotive under-hood environments. |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking, 0.01 g weight, UL 94V-0 flammability rating, and matte tin-plated alloy 42 leadframe for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential. |
| Cathode | Zener breakdown terminal / voltage regulation output | Marked with band; supplies regulated 4.7 V when reverse-biased above breakdown threshold with current-limiting resistor. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power dissipation at TL = +75°C | Enables sustained operation in thermally constrained PCB layouts with localized heating up to 75°C board temperature. |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor interfaces requiring high-reliability stress testing. |
| Halogen- and antimony-free "Green" compound | Meets strict environmental compliance: <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - suitable for RoHS 2 and ELV-compliant designs. |
| SOD123 footprint compatibility | Standardized 2.65 mm × 1.55 mm outline with 0.57 mm lead pitch - supports automated pick-and-place and reflow assembly. |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Control Panel |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADCs in temperature/humidity transmitters operating from 3.3 V rails. 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: Tight 4.47–4.94 V tolerance and low 5.0 µA leakage ensure <0.1% full-scale error drift over −40°C to +85°C ambient. |
Use Scenario: Overvoltage clamp protecting microcontroller GPIO pins from 12 V battery transients in HVAC control units. IC Role / Device Role / Timing Role: Reverse-biased transient suppressor limiting input voltage to safe logic levels during load-dump events. Use Value: 370 mW steady-state dissipation and AEC-Q101 qualification enable robust protection without external TVS diode. |
| Low-Power IoT Node Power Management | Medical Wearable Battery Monitoring |
Use Scenario: Generating stable 4.7 V reference for lithium coin-cell voltage monitoring in BLE-enabled asset trackers. IC Role / Device Role / Timing Role: Precision shunt regulator feeding comparator input to detect end-of-life battery drop below 2.8 V. Use Value: Sub-µA leakage at standby and 19 Ω ZZT ensure accurate threshold detection across 10-year shelf life. |
Use Scenario: Biasing photodiode amplifier in pulse oximeter front-end with ultra-low noise requirements. IC Role / Device Role / Timing Role: Low-capacitance (<30 pF) voltage reference minimizing phase shift in transimpedance feedback loop. Use Value: Typical 25 pF capacitance at 4.7 V avoids gain peaking and preserves bandwidth >100 kHz in analog signal chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V7 | Same 4.7 V nominal, but ±5% tolerance and 300 mW PD at TA = +25°C; SOD323 package (smaller, higher RθJA). | Higher thermal resistance (450 °C/W) limits use in high-ambient or high-duty-cycle applications. | Select when board space is critical and power dissipation remains below 150 mW. |
| MMBZ5230BS | Same electrical specs, but dual-anode SOT-323 package with common cathode - enables dual-Zener redundancy or rail-to-rail clamping. | Requires different PCB layout and supports fault-tolerant designs where single-point failure must be avoided. | Select for safety-critical medical or industrial systems needing redundant voltage references. |
Compared with BZX584-C4V7 and MMBZ5230BS, MMSZ5230B-7 offers superior thermal performance on standard FR-4 and proven AEC-Q101 qualification - making it preferred for automotive and industrial applications demanding long-term stability under thermal stress.
Availability
MMSZ5230B-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control panels, and low-power IoT node power management requiring stable component supply with full traceability and lifecycle support.
Supply support for MMSZ5230B-7 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 automotive, industrial, and consumer markets with broad distribution and design-in support.
MMSZ5230B-7 belongs to the MMSZ52xxB series of 500 mW Zener diodes engineered for cost-effective, high-volume voltage regulation in space-constrained surface-mount applications with AEC-Q101 compliance.
FAQ
What is the maximum continuous reverse current the MMSZ5230B-7 can handle without exceeding its power rating?
At +25°C ambient, the MMSZ5230B-7 supports up to 78.7 mA continuous reverse current (370 mW ÷ 4.7 V) before exceeding its 370 mW power dissipation limit. Derating applies above +25°C per Figure 1 - e.g., only 500 mW at +75°C board temperature (TL), corresponding to ~106 mA.
Is the MMSZ5230B-7 suitable for use in automotive engine control units (ECUs)?
Yes - it is AEC-Q101 qualified and rated for −65°C to +150°C operation. Its SOD123 package withstands mechanical shock and thermal cycling per automotive standards, and its 5.0 µA leakage at 2.0 V ensures low standby current in ECU power management circuits.
How does the Zener impedance of 19 Ω affect regulation accuracy under varying load conditions?
A 19 Ω Zener impedance means a 1 mA change in reverse current causes ~19 mV output variation - critical for precision references. For example, a 5 mA load step induces ~95 mV deviation, requiring careful current-source design or post-regulation filtering in sensitive analog stages.
Can the MMSZ5230B-7 replace the older MMSZ5230 in existing designs?
Yes - MMSZ5230B-7 supersedes MMSZ5230 with identical electrical specs, tighter Zener voltage tolerance (±5% vs. ±6%), improved RoHS compliance, and updated "Green" molding compound. The SOD123 footprint and marking remain unchanged, enabling drop-in replacement.
MMSZ5230B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- SOD-123
MMSZ5230B-7 FAQ
1.How can I place an order for MMSZ5230B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5230B-7 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 MMSZ5230B-7 reliable?
The price and inventory of MMSZ5230B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5230B-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5230B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5230B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5230B-7?
MMSZ5230B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5230B-7 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 MMSZ5230B-7?
For technical support, including MMSZ5230B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5230B-7 requirements.
6.How does Aetrix verify that MMSZ5230B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5230B-7 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 MMSZ5230B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5230B-7?
All MMSZ5230B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5230B-7, 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 MMSZ5230B-7 part is unused and in its original packaging.
Return procedure for MMSZ5230B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5230B-7 Tags
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