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onsemi MMSZ5232B
- Part No.:
- MMSZ5232B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5232B.pdf
- Description:
- DIODE ZENER 5.6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
MMSZ5232B from ON Semiconductor (formerly Fairchild) is a 5.6 V, 5% tolerance surface-mount Zener diode in SOD-123 package, rated for 500 mW power dissipation at 25°C, with 11 Ω dynamic impedance at 20 mA test current and 3.0 µA reverse leakage at 5.0 V, widely used for voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5232B datasheet, pinout, applications, or equivalent options, key selection considerations include its precise 5.6 V nominal Zener voltage, low 11 Ω impedance, 500 mW thermal rating, SOD-123 footprint compatibility, and stable temperature coefficient across industrial operating ranges.
Technical Context
The MMSZ5232B operates as a silicon planar Zener diode optimized for stable voltage reference and overvoltage clamping in space-constrained PCB layouts. It exhibits a nominal Zener voltage of 5.6 V with ±5% tolerance, 11 Ω dynamic impedance (ZZ) measured at IZ = 20 mA, and maintains ≤3.0 µA reverse leakage (IR) at VR = 5.0 V.
Its thermal performance is defined by a junction-to-ambient thermal resistance of 340°C/W on FR-4 board, enabling reliable operation up to +150°C junction temperature. The device features a forward voltage ≤0.9 V at IF = 10 mA and is specified across –55°C to +150°C storage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V (min–max at IZ = 20 mA); provides tight 5.6 V nominal reference for precision biasing |
| Zener Impedance (ZZ) | 11 Ω max at IZ = 20 mA; ensures minimal output voltage variation under load changes |
| Power Dissipation (PD) | 500 mW at TA = 25°C; supports continuous regulation in compact SOD-123 layout without forced cooling |
| Reverse Leakage (IR) | ≤3.0 µA at VR = 5.0 V; guarantees low quiescent current in battery-powered sensing nodes |
| Package | SOD-123; industry-standard 2-pin surface-mount outline with 3.5 × 1.5 inch thermal pad recommendation |
| Operating Temp | –55°C to +150°C junction; suitable for automotive under-hood and industrial control environments |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; enables use as low-drop rectifier or ESD clamp in dual-role designs |
Pinout & Package
Package: SOD-123 - 2-terminal surface-mount plastic package with cathode band marking; dimensions 3.7 mm × 1.6 mm × 1.2 mm (L × W × H), compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node; enables forward conduction ≤0.9 V drop at 10 mA |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal in reverse bias | Marked with band; connected to regulated voltage rail; conducts when reverse voltage ≥5.32 V |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in 5.6 V reference designs without recalibration or resistor trimming |
| Low 11 Ω dynamic impedance | Minimizes output voltage drift under varying load currents in feedback loops and sensor excitation |
| 500 mW power rating in SOD-123 | Delivers higher regulation headroom than smaller packages (e.g., SOD-323) without increasing board area |
| –55°C to +150°C operating range | Supports deployment in extended-temperature applications including motor control and outdoor IoT nodes |
| 0.9 V forward voltage max | Allows bidirectional use as both Zener clamp and low-VF protection diode in shared signal paths |
Applications
| Power Supply Regulation | Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5.6 V bias for op-amp rails or ADC reference in isolated DC/DC converter outputs. IC Role / Device Role / Timing Role: Precision shunt voltage reference providing stable excitation voltage independent of input ripple. Use Value: Maintains <±1% output stability over 10–100 mA load range due to low 11 Ω ZZ and tight 5% VZ tolerance. | Use Scenario: Providing calibrated excitation to resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition modules. IC Role / Device Role / Timing Role: Low-drift voltage reference source with minimal self-heating impact on measurement accuracy. Use Value: Enables 12-bit+ resolution by limiting reference error contribution to <0.5% over –40°C to +85°C ambient. |
| Overvoltage Protection | Microcontroller I/O Clamping |
Use Scenario: Protecting downstream 5 V logic inputs from transient surges in industrial fieldbus interfaces (e.g., RS-485 stubs). IC Role / Device Role / Timing Role: Fast-acting shunt clamp activated above 5.88 V to divert surge energy before IC damage. Use Value: Responds within nanoseconds with <3.0 µA leakage below trip point, preserving signal integrity during normal operation. | Use Scenario: Safeguarding GPIO pins of ARM Cortex-M microcontrollers against ESD and bus contention in handheld devices. IC Role / Device Role / Timing Role: Bidirectional clamp using forward conduction (≤0.9 V) and reverse Zener action (5.6 V) to limit pin voltage swing. Use Value: Prevents latch-up and gate oxide stress while adding <0.1 mm² footprint overhead in SOD-123. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C5V6 | 5.6 V, ±5%, 300 mW, SOD-523 package, 30 Ω ZZ @ 5 mA | Lower power rating and higher impedance limit use to ultra-low-current references (<5 mA) | Select when board space is critical and load current ≤2 mA; verify thermal margin at full ambient temp |
| MM3Z5V6 | 5.6 V, ±5%, 200 mW, SOD-323 package, 60 Ω ZZ @ 5 mA | Reduced power handling and higher impedance restrict use to signal-level clamping only | Prefer for cost-sensitive consumer designs where 200 mW suffices and SOD-323 placement is already standardized |
Compared with BZX584C5V6 and MM3Z5V6, the MMSZ5232B delivers 2.5× higher power capability and ~5× lower dynamic impedance at rated current, making it the preferred choice for active regulation and moderate-load reference applications where thermal headroom and voltage stability are prioritized.
Availability
MMSZ5232B is available at Aetrix Electronics and suitable for power supply regulation, sensor excitation, overvoltage protection, and microcontroller I/O clamping requiring stable component supply and long-term manufacturability.
Supply support for MMSZ5232B 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ5232B belongs to the MMSZ52xxB Zener diode family designed specifically for high-reliability, low-profile voltage reference and clamping in space-constrained, thermally demanding PCB environments.
FAQ
What is the nominal Zener voltage of the MMSZ5232B?
The MMSZ5232B has a nominal Zener voltage of 5.6 V, with a guaranteed range of 5.32 V (min) to 5.88 V (max) at a test current of 20 mA. This value is specified at 25°C ambient and reflects the device's primary function as a precision shunt voltage reference. The MMSZ5232B achieves this regulation via controlled avalanche breakdown in its silicon junction.
What is the maximum power dissipation rating for the MMSZ5232B?
The MMSZ5232B is rated for 500 mW maximum power dissipation at an ambient temperature of 25°C. Its thermal resistance is 340°C/W, meaning junction temperature rises approximately 170°C above ambient at full rated power. Derating is required above 25°C per the datasheet curve, and the MMSZ5232B must be mounted on recommended land pads to maintain reliability.
Does the MMSZ5232B have a specified forward voltage?
Yes, the MMSZ5232B has a maximum forward voltage of 0.9 V at a forward current of 10 mA. This parameter confirms its usability in bidirectional roles - as a Zener clamp in reverse bias and as a low-drop rectifier or ESD path in forward bias. The MMSZ5232B's VF specification supports design reuse in dual-function protection circuits.
What is the reverse leakage current of the MMSZ5232B at 5.0 V?
The MMSZ5232B exhibits a maximum reverse leakage current of 3.0 µA when biased at 5.0 V, well below its 5.32 V minimum Zener knee voltage. This low IR ensures minimal parasitic loading on sensitive analog nodes and preserves battery life in always-on sensor circuits. The MMSZ5232B maintains this spec across its full operating temperature range.
Which package type does the MMSZ5232B use?
The MMSZ5232B uses the SOD-123 surface-mount package - a 2-terminal, plastic-molded outline measuring 3.7 mm × 1.6 mm × 1.2 mm. It features a cathode band marking and is optimized for automated placement and reflow soldering. The MMSZ5232B's SOD-123 footprint aligns with IPC-7351B standards and supports thermal relief via recommended 3.5 × 1.5 inch copper land pads.
MMSZ5232B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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:
- SOD-123
MMSZ5232B FAQ
1.How can I place an order for MMSZ5232B through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5232B 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 MMSZ5232B reliable?
The price and inventory of MMSZ5232B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5232B is usually 5 days.
3.What payment methods are accepted for MMSZ5232B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5232B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5232B?
MMSZ5232B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5232B 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 MMSZ5232B?
For technical support, including MMSZ5232B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5232B requirements.
6.How does Aetrix verify that MMSZ5232B is sourced from the original manufacturer or authorized distributors?
All MMSZ5232B 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 MMSZ5232B meets industry standards.
7.What is the process for return or replacement of MMSZ5232B?
All MMSZ5232B units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5232B, 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 MMSZ5232B part is unused and in its original packaging.
Return procedure for MMSZ5232B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5232B Tags
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MM5Z5V1ST1G
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