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onsemi MMSZ5263BT1
- Part No.:
- MMSZ5263BT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5263BT1.pdf
- Description:
- DIODE ZENER 56V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,083
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Product details
Overview
MMSZ5263BT1 from ON Semiconductor is a 56 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 2.2 mA test current (IZT), 1300 Ω dynamic impedance (ZZT), and 0.1 µA reverse leakage at 43 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power rail regulation circuits.
For engineers reviewing the MMSZ5263BT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode/anode terminal mapping, automotive-grade AEC−Q101 qualification status, and direct alternatives for voltage reference design validation.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable reverse-biased breakdown at nominal 56 V with ±5% tolerance. Its junction-to-ambient thermal resistance is 340 °C/W, and it maintains specified Zener voltage under thermal equilibrium conditions at TL = 30°C ±1°C.
The MMSZ5263BT1 exhibits 150 Ω Zener impedance at IZK = 0.25 mA and supports ESD robustness >16 kV per Human Body Model. Its SOD−123 package enables high-density surface-mount assembly while meeting UL 94 V−0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V @ IZT = 2.2 mA - defines stable clamping threshold for 56 V nominal rail protection |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on standard FR−5 PCB |
| Zener Impedance (ZZT) | 1300 Ω @ IZT = 2.2 mA - indicates voltage regulation sensitivity to load current changes |
| Reverse Leakage (IR) | 0.1 µA @ VR = 43 V - ensures minimal quiescent current in standby voltage reference circuits |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against electrostatic discharge during handling and assembly |
| Package | SOD−123 (Case 425) - surface-mount footprint compatible with automated pick-and-place and reflow processes |
Pinout & Package
SOD−123 plastic surface-mount package with cathode indicated by polarity band; dimensions: 2.84 mm × 1.35 mm × 0.94 mm (L × W × H); lead-free, RoHS-compliant construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-bias voltage applied here relative to anode |
| 2 (Non-banded End) | Anode | Typically grounded or connected to lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current voltage reference and clamp applications without external heatsinking |
| AEC−Q101 Qualified | Validated for automotive electronics including body control modules and sensor interfaces |
| ±5% Zener Tolerance | Provides predictable clamping accuracy suitable for non-critical regulation and overvoltage detection |
| UL 94 V−0 Flammability | Meets safety requirements for enclosed industrial and consumer power supply designs |
| Pb−Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 |
Applications
| Automotive Sensor Reference | Industrial Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive temperature detectors (RTDs) in engine coolant temperature modules. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed bias point for analog front-end signal conditioning. Use Value: Maintains <±1% reference drift across −40°C to +125°C ambient due to low TC and thermal equilibrium characterization. |
Use Scenario: Clamping transient spikes on 48 V auxiliary power bus in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy before downstream DC-DC converters. Use Value: Limits peak voltage to ≤58.8 V with 1300 Ω dynamic impedance, preventing latch-up in 60 V-rated MOSFETs. |
| Medical Instrument Calibration | IoT Edge Node Voltage Monitor |
Use Scenario: Generating stable 56 V reference for calibration of high-voltage analog-to-digital converter inputs in portable ultrasound units. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known voltage for ADC offset correction. Use Value: Delivers 0.1 µA leakage at 43 V, minimizing error contribution in microamp-level bias networks. |
Use Scenario: Monitoring battery pack voltage in smart metering endpoints using Zener-based comparator threshold. IC Role / Device Role / Timing Role: Passive voltage threshold detector enabling low-power wake-up on overvoltage events. Use Value: Operates reliably down to −55°C with no startup delay, supporting cold-climate deployment in utility infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C56LT1G | Same 56 V ±5%, but SOT-23 package (higher RJA = 375 °C/W); 400 mW rating at 25°C | Lower power density; less suitable for sustained 2.2 mA operation above 70°C ambient | Select when board space allows larger footprint and thermal margin exceeds 500 mW requirement |
| MMSZ5263BT1G | Identical electrical specs and SOD−123 package; Pb−Free version with same marking "N3" and 3000/reel tape & reel packaging | No functional difference; fully interchangeable in new designs requiring RoHS compliance | Preferred for new production where Pb−Free compliance is mandatory per customer or regional regulation |
Compared with MMSZ5263BT1, BZX84-C56LT1G offers identical voltage regulation but reduced thermal performance in compact layouts, while MMSZ5263BT1G provides drop-in Pb−Free compliance without electrical or mechanical compromise.
Availability
MMSZ5263BT1 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial power rail clamp, medical instrument calibration, and IoT edge node voltage monitor applications requiring stable component supply, long-term lifecycle support, and AEC−Q101 qualified parts.
Supply support for MMSZ5263BT1 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ52xxxT1G series was designed for general-purpose, medium-current Zener regulation in space-constrained surface-mount applications-emphasizing thermal stability, AEC−Q101 qualification, and high-volume manufacturability.
FAQ
What is the Zener voltage tolerance of the MMSZ5263BT1?
The MMSZ5263BT1 has a ±5% Zener voltage tolerance, meaning its reverse breakdown voltage ranges from 53.2 V to 58.8 V when measured at IZT = 2.2 mA and under thermal equilibrium conditions (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official ON Semiconductor datasheet for the MMSZ52xxxT1G Series.
Is the MMSZ5263BT1 suitable for automotive applications?
Yes, the MMSZ5263BT1 is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as engine control unit (ECU) sensor biasing, infotainment power supervision, and body electronics voltage monitoring. Its guaranteed operation from −55°C to +150°C junction temperature and Class 3 ESD rating further support under-hood and cabin deployment.
What is the maximum power dissipation of the MMSZ5263BT1 at 100°C ambient?
At 100°C ambient, the MMSZ5263BT1 must be derated from its 500 mW rating at 75°C. With a derating factor of 6.7 mW/°C above 75°C, its maximum allowable power dissipation is 500 mW − (6.7 mW/°C × 25°C) = 332.5 mW. This value assumes mounting on FR−5 board with minimum recommended footprint per datasheet Note 1.
Does the MMSZ5263BT1 have a Pb−Free version?
Yes, the MMSZ5263BT1G is the Pb−Free, RoHS-compliant version of the MMSZ5263BT1, sharing identical electrical specifications, SOD−123 package, and marking code "N3". It is supplied in 3,000-unit tape-and-reel format and is functionally interchangeable in new designs requiring lead-free compliance.
How is polarity identified on the MMSZ5263BT1 package?
The MMSZ5263BT1 uses a cathode band to indicate polarity: the banded end is Pin 1 (Cathode), and the non-banded end is Pin 2 (Anode). This marking aligns with the SOD−123 mechanical drawing (Case 425−04) and is visible under standard optical inspection during PCB assembly.
MMSZ5263BT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 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
MMSZ5263BT1 FAQ
1.How can I place an order for MMSZ5263BT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5263BT1 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 MMSZ5263BT1 reliable?
The price and inventory of MMSZ5263BT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5263BT1 is usually 5 days.
3.What payment methods are accepted for MMSZ5263BT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5263BT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5263BT1?
MMSZ5263BT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5263BT1 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 MMSZ5263BT1?
For technical support, including MMSZ5263BT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5263BT1 requirements.
6.How does Aetrix verify that MMSZ5263BT1 is sourced from the original manufacturer or authorized distributors?
All MMSZ5263BT1 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 MMSZ5263BT1 meets industry standards.
7.What is the process for return or replacement of MMSZ5263BT1?
All MMSZ5263BT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5263BT1, 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 MMSZ5263BT1 part is unused and in its original packaging.
Return procedure for MMSZ5263BT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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