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onsemi SZMMSZ5232BT1
- Part No.:
- SZMMSZ5232BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5232BT1.pdf
- Description:
- DIODE ZENER 5.6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:52,930
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Product details
Overview
SZMMSZ5232BT1 from onsemi is a 5.6 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 11 Ω dynamic impedance at 20 mA test current and 0.25 µA leakage at 3 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the SZMMSZ5232BT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC−Q101 qualification status, and direct alternatives for automotive and industrial voltage stabilization designs.
Technical Context
This device operates as a two-terminal silicon Zener regulator with cathode-anode polarity, designed for stable reverse-biased breakdown at nominal 5.6 V under thermal equilibrium (TL = 30°C ±1°C). Its 11 Ω Zener impedance at IZT = 20 mA and 1600 Ω at IZK = 0.25 mA supports tight regulation in feedback paths and reference nodes.
Thermal resistance is 340°C/W junction-to-ambient and 150°C/W junction-to-lead, enabling predictable power derating above 75°C ambient. The SOD−123 package meets UL 94 V−0 flammability rating and supports automated placement with Pb−free reflow compatibility up to 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ IZT = 20 mA - defines stable regulation range for 5 V system references |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous DC power before thermal derating begins |
| Zener Impedance (ZZT) | 11 Ω @ IZT = 20 mA - ensures minimal output voltage variation under load transients |
| Leakage Current (IR) | 0.25 µA @ VR = 3 V - guarantees negligible 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 HBM) - provides robust handling during PCB assembly without external protection |
| Tolerance | ±5% - matches standard 5 V rail tolerance requirements for non-critical reference applications |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free thermosetting material, cathode indicated by band. Dimensions: 2.84 mm × 1.35 mm × 0.97 mm (L × W × H), 0.51–0.71 mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-bias voltage applied here to initiate Zener conduction |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive electronics including engine control modules and body electronics |
| Pb−Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 |
| High ESD Robustness | Withstands >16 kV human-body-model discharge without parameter shift or failure |
| Thermal Equilibrium Spec | Zener voltage measured at TL = 30°C ±1°C, ensuring repeatable calibration across production lots |
| Automated Assembly Optimized | Flat, coplanar leads and standardized marking enable high-yield pick-and-place and reflow |
Applications
| Automotive Sensor Reference | Industrial PLC Input Protection |
|---|---|
Use Scenario: Providing stable 5.6 V reference for analog front-end of temperature and pressure sensors in engine control units. IC Role / Device Role / Timing Role: Voltage reference element establishing precise bias point for ADC input scaling and sensor excitation. Use Value: Maintains <±2% reference accuracy over −40°C to +125°C due to matched TC and low ZZT. |
Use Scenario: Clamping transient overvoltage on 24 V digital input channels of programmable logic controllers. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input voltage to safe levels during inductive switching events. Use Value: Absorbs 100 W non-repetitive surge (per Figure 4) while holding clamped voltage ≤6.2 V. |
| IoT Node Power Monitoring | Medical Diagnostic Equipment Biasing |
Use Scenario: Regulating auxiliary 5 V rail for microcontroller and RF transceiver in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-quiescent-current shunt regulator maintaining stable supply during sleep/wake cycles. Use Value: Draws only 0.25 µA leakage at 3 V, extending coin-cell battery life beyond 5 years. |
Use Scenario: Generating precision bias voltage for op-amp gain-setting networks in portable ultrasound signal conditioning circuits. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing amplifier offset and gain drift over temperature. Use Value: Temperature coefficient of +2.5 mV/°C (Figure 1) enables predictable compensation in closed-loop designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5232BT1G | Same Zener voltage (5.32–5.88 V), identical SOD−123 package, but lacks AEC−Q101 qualification and SZ-prefix automotive traceability | Not approved for automotive PPAP; suitable for commercial-grade consumer or industrial equipment | Select when automotive qualification is not required and cost optimization is prioritized |
| SZMMSZ5232CT1G | ±2% tolerance (5.488–5.712 V), same package and thermal specs, tighter regulation but higher unit cost | Better suited for precision feedback loops where ±5% introduces unacceptable error margin | Choose when reference stability dominates cost considerations, e.g., medical-grade instrumentation |
Compared with SZMMSZ5232BT1, MMSZ5232BT1G offers identical electrical performance without automotive compliance overhead, while SZMMSZ5232CT1G trades wider tolerance for improved accuracy-enabling selection based on end-equipment qualification tier and voltage budget constraints.
Availability
SZMMSZ5232BT1 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC input protection, IoT node power monitoring, and medical diagnostic equipment biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZMMSZ5232BT1 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMMSZ52xxxT1G series is part of onsemi's automotive-qualified Zener portfolio, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units where reliability and AEC−Q101 compliance are mandatory.
FAQ
What is the Zener voltage tolerance for SZMMSZ5232BT1?
The SZMMSZ5232BT1 has a ±5% tolerance on its nominal 5.6 V Zener voltage, resulting in a guaranteed range of 5.32 V to 5.88 V at IZT = 20 mA and thermal equilibrium conditions (TL = 30°C ±1°C). This tolerance aligns with general-purpose regulation needs in automotive and industrial systems where tighter accuracy is not required.
Is SZMMSZ5232BT1 qualified for automotive use?
Yes, SZMMSZ5232BT1 is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-specific site controls, change management, and traceability. It meets all stress tests including temperature cycling, humidity bias, and mechanical shock required for under-hood and chassis-mounted electronics.
What is the maximum power dissipation of SZMMSZ5232BT1 on FR−5 board?
SZMMSZ5232BT1 is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) = 75°C, with linear derating of 6.7 mW/°C above that temperature. This value assumes minimum recommended footprint per datasheet Figure 3 and accounts for thermal resistance of 340°C/W junction-to-ambient.
Does SZMMSZ5232BT1 have Pb−free construction?
Yes, SZMMSZ5232BT1 is Pb−free and complies with RoHS Directive 2011/65/EU. Its SOD−123 package uses lead-free solder terminations compatible with standard reflow profiles, including peak temperatures up to 260°C for 10 seconds as specified in the datasheet.
What is the Zener impedance of SZMMSZ5232BT1 at 20 mA test current?
The dynamic Zener impedance (ZZT) of SZMMSZ5232BT1 is 11 Ω at IZT = 20 mA, measured with 1 kHz AC signal at 0.1× DC current. This low impedance ensures minimal output voltage deviation during load transients in feedback networks and reference circuits.
SZMMSZ5232BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ5232BT1 FAQ
1.How can I place an order for SZMMSZ5232BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5232BT1 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 SZMMSZ5232BT1 reliable?
The price and inventory of SZMMSZ5232BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5232BT1 is usually 5 days.
3.What payment methods are accepted for SZMMSZ5232BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5232BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5232BT1?
SZMMSZ5232BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5232BT1 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 SZMMSZ5232BT1?
For technical support, including SZMMSZ5232BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5232BT1 requirements.
6.How does Aetrix verify that SZMMSZ5232BT1 is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5232BT1 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 SZMMSZ5232BT1 meets industry standards.
7.What is the process for return or replacement of SZMMSZ5232BT1?
All SZMMSZ5232BT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5232BT1, 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 SZMMSZ5232BT1 part is unused and in its original packaging.
Return procedure for SZMMSZ5232BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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