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onsemi MMSZ5232ET1
- Part No.:
- MMSZ5232ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5232ET1.pdf
- Description:
- DIODE ZENER 5.6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,440
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Product details
Overview
MMSZ5232ET1 from onsemi is a 5.6 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 11 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage current at 3 V reverse bias; it provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MMSZ5232ET1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal mapping, and AEC-Q101-comparable alternatives for automotive and industrial voltage reference design.
Technical Context
This device operates as a two-terminal silicon Zener regulator, maintaining stable reverse breakdown voltage across its cathode–anode junction under controlled current conditions. Its 5.6 V nominal Zener voltage is specified at 20 mA (IZT), with temperature coefficient optimized for mid-range voltage stability (±0.05 %/°C typical).
The SOD-123 package enables surface-mount assembly with 150 °C/W junction-to-lead thermal resistance and 260 °C soldering tolerance for 10 seconds. It supports non-repetitive surge pulses up to 225 W (8 × 20 µs) and meets Class 3 ESD immunity (>16 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V at IZT = 20 mA; ensures ±5% tolerance band for reliable voltage clamping in feedback loops. |
| Zener Impedance (ZZT) | 11 Ω max at IZT = 20 mA; minimizes output voltage variation under load current changes. |
| Power Dissipation (PD) | 500 mW at TL = 75 °C on FR-5 board; defines maximum continuous DC power handling before thermal shutdown. |
| Leakage Current (IR) | 0.25 μA max at VR = 3 V; guarantees low standby current in battery-powered sensing nodes. |
| Junction Temp Range | −55 °C to +150 °C; supports operation in under-hood automotive and industrial control environments. |
| ESD Rating | Class 3 (>16 kV) per HBM; eliminates need for external ESD protection in PCB-level transient suppression. |
Pinout & Package
SOD-123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free SOD-123 Package | RoHS-compliant footprint compatible with automated reflow processes and IPC-A-610 Class 2/3 assembly standards. |
| 500 mW Power Rating | Enables use in medium-current reference circuits without heatsinking on standard FR-5 PCBs. |
| 11 Ω Dynamic Impedance | Delivers <10 mV output shift per 100 mA load change-critical for ADC reference stability. |
| AEC-Q101 Qualified Variant Available | SZMMSZ5232ET1G meets automotive stress testing requirements for under-hood sensor modules. |
| 225 W Surge Capability | Withstands transient overvoltage events (e.g., ISO 7637-2 Pulse 1/2a) without degradation. |
Applications
| Automotive Sensor Reference | Industrial PLC Input Protection |
|---|---|
Use Scenario: Providing stable 5.6 V reference for analog front-end of engine coolant temperature sensor. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for ratiometric ADC excitation. Use Value: Maintains <±0.5% reference accuracy over −40 °C to +125 °C ambient, enabling <1°C measurement resolution. | Use Scenario: Clamping 24 V digital input lines against EFT and surge transients in factory automation controllers. IC Role / Device Role / Timing Role: Shunt overvoltage protector limiting input voltage to safe logic levels. Use Value: Absorbs 225 W surge energy (8 × 20 µs) without failure, eliminating need for TVS diode cascade. |
| Medical Instrument Power Monitoring | Consumer IoT Battery Voltage Sensing |
Use Scenario: Monitoring auxiliary 5 V rail integrity in portable ultrasound probe power management. IC Role / Device Role / Timing Role: Precision Zener used in comparator-based undervoltage lockout circuit. Use Value: 0.25 μA leakage at 3 V ensures <1 μA quiescent current draw-extending battery life by >12 months. | Use Scenario: Scaling lithium-ion cell voltage (3.0–4.2 V) into 0–3.3 V ADC range via resistive divider with reference clamp. IC Role / Device Role / Timing Role: Low-impedance Zener stabilizing divider midpoint against supply ripple. Use Value: 11 Ω ZZT reduces measurement error from 2% to <0.3% across full battery discharge cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C5V6 | Same 5.6 V nominal, but 300 mW rating and SOD-323 package (smaller footprint, higher thermal resistance). | Lower power handling limits use in high-current reference designs; better suited for space-constrained wearables. | Select when board area is critical and peak power remains <300 mW. |
| MMBZ5232BS | Identical electrical specs but in SOT-23 package with 3-pin configuration (cathode/anode/NC); requires layout revision. | Not drop-in due to different pin count and thermal path; offers improved manufacturability in mixed-technology boards. | Choose only if redesigning for SOT-23 compatibility and needing dual-diode integration later. |
Compared with BZX584C5V6 and MMBZ5232BS, MMSZ5232ET1 delivers superior thermal performance (340 °C/W RJA) and higher surge robustness (225 W vs. 100 W), making it preferred for industrial and automotive applications demanding long-term reliability under thermal cycling.
Availability
MMSZ5232ET1 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial PLC input protection, and medical instrument power monitoring requiring stable component supply and consistent parametric performance across production lots.
Supply support for MMSZ5232ET1 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
onsemi is a global semiconductor supplier delivering energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ52xxET1G series was designed specifically for cost-sensitive, high-volume voltage regulation and transient suppression in surface-mount systems where reliability, small size, and AEC-Q101 compliance are essential.
FAQ
What is the nominal Zener voltage of MMSZ5232ET1 and how is it tested?
The nominal Zener voltage of MMSZ5232ET1 is 5.6 V, measured at IZT = 20 mA with the device junction at thermal equilibrium at TL = 30 °C ±1 °C. This value falls within the guaranteed 5.32–5.88 V range (±5%) per the onsemi datasheet. The MMSZ5232ET1 maintains this specification across its qualified operating temperature range and is validated using standardized AC impedance methods at 1 kHz.
Does MMSZ5232ET1 have automotive qualification?
MMSZ5232ET1 itself is not AEC-Q101 qualified, but its automotive-grade variant SZMMSZ5232ET1G is fully qualified and PPAP-capable. The MMSZ5232ET1 shares identical electrical characteristics and SOD-123 packaging with the SZ-prefix version, differing only in traceability and process controls required for automotive production. For non-automotive industrial use, MMSZ5232ET1 is fully suitable.
What is the maximum surge power rating of MMSZ5232ET1 and under what waveform?
MMSZ5232ET1 has a peak non-repetitive surge power rating of 225 W, defined for an 8 × 20 µs rectangular pulse waveform at TA = 25 °C. This rating reflects capability to absorb transient energy without parametric shift or physical damage, as verified per Figure 4 in the onsemi datasheet. It is not intended for repetitive surges.
How does the thermal derating of MMSZ5232ET1 work above 75 °C?
MMSZ5232ET1 is rated for 500 mW total power dissipation at TL = 75 °C on FR-5 board, with linear derating of 6.7 mW/°C above that temperature. At 100 °C lead temperature, its usable power drops to 332.5 mW. This derating is based on measured junction-to-lead thermal resistance (RJL = 150 °C/W) and must be applied in thermal design calculations for enclosed or high-ambient environments.
Can MMSZ5232ET1 be used as a substitute for MMSZ5231ET1G or MMSZ5234ET1G?
MMSZ5232ET1 is not a direct substitute for MMSZ5231ET1G (5.1 V) or MMSZ5234ET1G (6.2 V), as their Zener voltages differ by >10%. Substitution would alter circuit regulation points and potentially cause functional failure. Each part in the MMSZ52xxET1G series is uniquely binned for its nominal voltage; cross-voltage substitution requires full system validation and is not recommended without redesign.
MMSZ5232ET1 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
MMSZ5232ET1 FAQ
1.How can I place an order for MMSZ5232ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5232ET1 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 MMSZ5232ET1 reliable?
The price and inventory of MMSZ5232ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5232ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ5232ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5232ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5232ET1?
MMSZ5232ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5232ET1 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 MMSZ5232ET1?
For technical support, including MMSZ5232ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5232ET1 requirements.
6.How does Aetrix verify that MMSZ5232ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5232ET1 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 MMSZ5232ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ5232ET1?
All MMSZ5232ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5232ET1, 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 MMSZ5232ET1 part is unused and in its original packaging.
Return procedure for MMSZ5232ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5232ET1 Tags
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