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Diodes Incorporated MMSZ5225B-7-F
- Part No.:
- MMSZ5225B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5225B-7-F.pdf
- Description:
- DIODE ZENER 3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:23,017
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Product details
Overview
MMSZ5225B-7-F from Diodes Incorporated is a 3.0 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 20 mA test current with 1.6 kΩ dynamic impedance at 1 kHz and 50 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail regulation circuits.
For engineers reviewing the MMSZ5225B-7-F datasheet, MMSZ5225B-7-F pinout, MMSZ5225B-7-F application, or MMSZ5225B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification status, and SOD-123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 3.0 V nominal Zener voltage exhibits a positive temperature coefficient of approximately +0.04 %/°C, and it delivers regulated output within ±0.15 V over the 2.85–3.15 V range at 20 mA test current.
The device is optimized for medium-current, general-purpose regulation with 500 mW maximum power dissipation at lead temperature (TL = +75°C) and 370 mW at ambient (TA = +25°C). Its SOD-123 package supports reflow soldering and meets J-STD-020 moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal, 2.85–3.15 V range at 20 mA - ensures tight voltage reference for 3.3 V rail monitoring or biasing. |
| Power Dissipation (PD) | 370 mW @ TA = +25°C - defines maximum continuous power in standard PCB layout without forced cooling. |
| Zener Impedance (ZZT) | 1.6 kΩ @ 1 kHz, 20 mA - indicates voltage stability under small-signal AC ripple conditions. |
| Reverse Leakage (IR) | 50 µA @ VR = 1.0 V - confirms low standby current in clamping or reference applications. |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction temperature rise per watt in FR-4 board with 1-inch copper pad. |
| Operating Temperature | −65°C to +150°C - supports industrial and automotive under-hood environments. |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking, 0.01 g weight, UL 94V-0 flammability rating, and matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation. |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Provides regulated 3.0 V output relative to anode; marked by visible band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables robust voltage clamping in transient suppression and feedback loop references without derating below 75°C lead temperature. |
| AEC-Q101 Qualified | Validated for automotive electronics use including infotainment power supplies and sensor interface circuits. |
| SOD-123 Footprint | Standardized 2.65 mm × 1.55 mm outline compatible with high-speed pick-and-place equipment and IPC-7351B land patterns. |
| Halogen & Antimony Free | Meets strict environmental compliance (Br+Cl <1500 ppm, Sb <1000 ppm) for green manufacturing and RoHS 2 (2011/65/EU). |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Reference |
|---|---|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA transmitter modules operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Zener diode provides fixed 3.0 V reference for current-loop DAC output scaling and ADC input protection. Use Value: Tight 5% voltage tolerance and low 50 µA leakage ensure <0.1% full-scale error drift over temperature and supply variation. |
Use Scenario: Generating precise 3.0 V reference for USB PD controller VREF pin in portable chargers with dual-role power negotiation. IC Role / Device Role / Timing Role: Acts as passive voltage reference for PD policy engine analog comparators during source/sink role detection. Use Value: SOD-123 footprint allows placement near PD IC with minimal trace inductance, preserving noise immunity during 3 A/20 V power switching events. |
| Automotive Body Control Module Clamping | IoT Node Battery Monitoring |
Use Scenario: Protecting LIN bus transceiver inputs from load-dump transients in door module ECUs exposed to 12 V battery fluctuations. IC Role / Device Role / Timing Role: Zener diode clamps induced spikes above 3.3 V to prevent latch-up in 3.3 V logic-level receivers. Use Value: 500 mW rating sustains 100 ms pulses up to 100 V without degradation, validated per ISO 7637-2 Pulse 5a. |
Use Scenario: Scaling lithium-ion cell voltage (2.5–4.2 V) to 0–3.0 V range for 12-bit ADC input in BLE-enabled asset trackers. IC Role / Device Role / Timing Role: Forms resistive divider top leg with matched resistor to deliver ratiometric reference to ADC reference pin. Use Value: Stable 3.0 V output with ±0.15 V tolerance enables ±10 mV cell voltage resolution across full battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V0 | 3.0 V, 300 mW, SOD-323 package, 100 Ω ZZT @ 5 mA | Lower power rating and smaller footprint; higher impedance limits AC regulation performance. | Select for space-constrained designs where 300 mW suffices and tighter Zener impedance is not required. |
| MM3Z3V0T1G | 3.0 V, 200 mW, SOD-323, 90 Ω ZZT @ 5 mA, ±5% tolerance | Reduced power handling and different thermal profile; optimized for ultra-low-cost consumer PCBs. | Prefer for cost-sensitive, non-automotive applications where 200 mW derating aligns with system thermal budget. |
Compared with BZX584C3V0 and MM3Z3V0T1G, MMSZ5225B-7-F offers superior power handling (370 mW @ 25°C), AEC-Q101 qualification, and SOD-123 mechanical robustness-making it the preferred choice for industrial and automotive voltage reference nodes requiring long-term stability and thermal resilience.
Availability
MMSZ5225B-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery reference, automotive body control module clamping, and IoT node battery monitoring requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for MMSZ5225B-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 automotive, industrial, and computing markets with over 50 years of power management expertise.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in space-constrained, high-volume surface-mount applications.
FAQ
What is the maximum reverse voltage (VR) before significant leakage occurs?
The datasheet specifies 50 µA maximum reverse leakage current at VR = 1.0 V. At 2.5 V, leakage remains below 5 µA; beyond 2.85 V, the device enters nominal Zener breakdown. Exceeding 3.15 V continuously risks thermal runaway unless power dissipation is strictly limited to ≤370 mW at +25°C ambient.
Is MMSZ5225B-7-F suitable for use in automotive applications?
Yes-MMSZ5225B-7-F is explicitly qualified to AEC-Q101 standards for high-reliability automotive use. Its −65°C to +150°C operating range, halogen-free construction, and SOD-123 mechanical robustness meet requirements for under-hood and cabin modules, including body control units and sensor interfaces.
How does the SOD-123 package affect thermal performance compared to DO-35?
The SOD-123 package has RθJA = 338 °C/W on FR-4 with 1-inch copper pad, versus ~200 °C/W for axial DO-35. While less efficient than through-hole alternatives, SOD-123 enables automated assembly and achieves adequate thermal performance for ≤370 mW operation in compact layouts with proper copper pour design.
Can this Zener diode be used in series to achieve higher reference voltages?
Yes-multiple MMSZ5225B-7-F devices may be stacked in series to generate composite reference voltages (e.g., two in series yield ~6.0 V). However, voltage matching tolerance accumulates (±10% total), and thermal coupling must be managed to avoid imbalance; dedicated higher-voltage Zeners like MMSZ5233B are preferred for >5 V references.
MMSZ5225B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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:
- SOD-123
MMSZ5225B-7-F FAQ
1.How can I place an order for MMSZ5225B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5225B-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 MMSZ5225B-7-F reliable?
The price and inventory of MMSZ5225B-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 MMSZ5225B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5225B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5225B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5225B-7-F?
MMSZ5225B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5225B-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 MMSZ5225B-7-F?
For technical support, including MMSZ5225B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5225B-7-F requirements.
6.How does Aetrix verify that MMSZ5225B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5225B-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 MMSZ5225B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5225B-7-F?
All MMSZ5225B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5225B-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 MMSZ5225B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5225B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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