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onsemi MMSZ5258CT1G
- Part No.:
- MMSZ5258CT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5258CT1G.pdf
- Description:
- DIODE ZENER 36V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,923
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Product details
Overview
MMSZ5258CT1G from onsemi is a 36 V ±2% tolerance Zener diode in SOD−123 package, rated for 500 mW power dissipation on FR−5 board at 75°C, with 3.4 mA test current (IZT), 70 Ω dynamic impedance (ZZT), and 0.1 μA reverse leakage at 27 V (VR). It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.
For engineers reviewing the MMSZ5258CT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 2% Zener voltage tolerance, thermal equilibrium–specified VZ, low leakage at rated VR, SOD−123 footprint compatibility, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
The MMSZ5258CT1G operates as a two-terminal silicon Zener diode, conducting in reverse breakdown to maintain stable voltage across its terminals when biased above its nominal 36 V Zener voltage. Its junction temperature range spans −55°C to +150°C, and it achieves thermal equilibrium–calibrated VZ measurement at TL = 30°C ±1°C.
It exhibits a typical temperature coefficient of +30 mV/°C near 36 V, requires 3.4 mA IZT for specification compliance, and delivers 700 Ω maximum Zener impedance at knee current (ZZK) with 0.25 mA IZK - confirming stable regulation under light-load and transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.28 V min / 36 V nom / 36.72 V max @ IZT = 3.4 mA - ensures precise 36 V regulation with ±2% tolerance for reference stability. |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - defines maximum continuous power handling before thermal derating begins. |
| Zener Impedance (ZZT) | 70 Ω max @ IZT = 3.4 mA - indicates low AC impedance for minimal output voltage variation under dynamic load changes. |
| Reverse Leakage (IR) | 0.1 μA max @ VR = 27 V - confirms minimal standby current in clamping or reference applications below breakdown. |
| Junction Temp Range | −55°C to +150°C - supports operation in extended industrial and automotive under-hood environments. |
| ESD Rating | Class 3 (>16 kV) HBM - enables robust handling during automated assembly without special ESD controls. |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - surface-mount, Pb−free, void-free thermoset plastic case compatible with standard reflow profiles. |
Pinout & Package
SOD−123 package: 2-lead surface-mount device with cathode indicated by polarity band; lead-free, UL 94 V−0 rated, maximum soldering temperature 260°C for 10 seconds.
| 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 bias path for reverse conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener Voltage Tolerance | Enables high-accuracy voltage references without post-production trimming in sensor signal conditioning or ADC bias networks. |
| 500 mW Power Rating | Supports sustained clamping in 3.3 V/5 V/12 V rail protection circuits without thermal runaway on standard PCBs. |
| Low 0.1 μA Leakage @ 27 V | Minimizes quiescent current draw in battery-powered voltage monitors and always-on supervisor circuits. |
| AEC−Q101 Qualified | Validated for automotive applications including body control modules and infotainment power rails requiring long-term reliability. |
| ESD Class 3 (HBM >16 kV) | Reduces risk of field failure due to handling-induced damage during SMT assembly or end-equipment service. |
Applications
| Industrial Sensor Reference | Automotive Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 36 V reference for 4–20 mA transmitter loop-powered sensors operating in harsh factory environments. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference replacing higher-cost IC references where ultra-low drift is not required. Use Value: Delivers ±2% accuracy over −40°C to +125°C without external compensation, reducing BOM count and layout area. |
Use Scenario: Clamps transients on 24 V CAN bus power lines in vehicle ECUs exposed to load dump events up to ISO 7637–2 Pulse 5a. IC Role / Device Role / Timing Role: Standalone overvoltage protection element placed directly across supply rail input. Use Value: Absorbs 100 W+ surge pulses (per Figure 4) while maintaining <37 V clamping voltage, protecting downstream PMICs and microcontrollers. |
| Portable Medical Device Bias | Programmable Logic Supply Monitor |
Use Scenario: Sets bias point for op-amp front-end amplifiers in handheld ultrasound probe analog chains requiring low-noise, stable DC offsets. IC Role / Device Role / Timing Role: Precision DC voltage source for amplifier common-mode level setting and ADC reference scaling. Use Value: 70 Ω ZZT ensures <2.5 mV ripple under 100 μA load variation, preserving SNR in sub-mV signal paths. |
Use Scenario: Monitors 3.3 V FPGA I/O bank supply using resistor divider + comparator; MMSZ5258CT1G provides accurate 36 V threshold reference. IC Role / Device Role / Timing Role: Stable voltage reference for undervoltage lockout (UVLO) and overvoltage detection comparators. Use Value: ±2% tolerance eliminates need for calibration trimmers, enabling single-BOM production across global manufacturing sites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36LT1G | Same 36 V nominal, ±5% tolerance, SOT−23 package (larger footprint, higher RJA = 350°C/W). | Higher thermal resistance limits continuous power to ~350 mW on FR−4; less suitable for sustained 3.4 mA IZT operation. | Select when SOT−23 is already standardized in design and ±5% tolerance is acceptable. |
| MMSZ5258BT1G | Identical 36 V nominal, but ±5% tolerance (34.2–37.8 V), same SOD−123 package and electrical specs otherwise. | Wider VZ spread increases uncertainty in precision reference use cases; identical thermal and leakage performance. | Choose only for cost-sensitive non-critical clamping where tighter tolerance is unnecessary. |
Compared with MMSZ5258CT1G, BZX84-C36LT1G offers SOT−23 compatibility but sacrifices power handling and tolerance; MMSZ5258BT1G matches form-factor and thermal behavior but trades ±2% accuracy for lower unit cost in non-precision roles.
Availability
MMSZ5258CT1G is available at Aetrix Electronics and suitable for industrial sensor reference, automotive power rail clamp, portable medical device bias, and programmable logic supply monitor applications requiring stable component supply, AEC−Q101 compliance, and Pb−free RoHS conformance.
Supply support for MMSZ5258CT1G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications, with core expertise in discrete devices, power management, and sensing technologies.
The MMSZ52xxxT1G series was designed to deliver high-reliability, surface-mount Zener regulation for space-constrained, thermally demanding applications - particularly where AEC−Q101 qualification, tight voltage tolerance, and robust ESD immunity are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of MMSZ5258CT1G?
The MMSZ5258CT1G has a nominal Zener voltage of 36 V with a tight ±2% tolerance, meaning its specified range is 35.28 V to 36.72 V when measured at IZT = 3.4 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "2% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 4 of the official onsemi datasheet for MMSZ5258CT1G.
What package type and dimensions does MMSZ5258CT1G use?
MMSZ5258CT1G uses the SOD−123 surface-mount package (case 425, style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. It features a cathode band marking, Pb−free construction, UL 94 V−0 flammability rating, and is qualified for reflow soldering at 260°C for 10 seconds - all verified in the Mechanical Characteristics section of the onsemi MMSZ5258CT1G datasheet.
How much power can MMSZ5258CT1G dissipate continuously?
MMSZ5258CT1G is rated for 500 mW total power dissipation on an FR−5 board at a lead temperature (TL) of 75°C. Above 75°C, it derates linearly at 6.7 mW/°C, reaching zero dissipation at approximately 148°C. This rating is defined in the Maximum Ratings table (page 2) and validated via infrared scan method per onsemi's MMSZ5258CT1G datasheet.
What is the Zener impedance and test condition for MMSZ5258CT1G?
The MMSZ5258CT1G has a maximum Zener impedance (ZZT) of 70 Ω, measured at IZT = 3.4 mA with an AC test signal of IZ(AC) = 0.1 × IZ(DC) at 1 kHz frequency. This low dynamic impedance ensures minimal voltage variation under changing load currents - a key parameter documented in the "2% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table (page 4) of the official MMSZ5258CT1G datasheet.
Is MMSZ5258CT1G qualified for automotive applications?
Yes, MMSZ5258CT1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. It meets automotive reliability requirements for temperature cycling, humidity testing, and mechanical shock - making it suitable for use in body control modules, infotainment systems, and other automotive subsystems where certified component qualification is mandatory.
MMSZ5258CT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- MMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 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
MMSZ5258CT1G FAQ
1.How can I place an order for MMSZ5258CT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5258CT1G 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 MMSZ5258CT1G reliable?
The price and inventory of MMSZ5258CT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5258CT1G is usually 5 days.
3.What payment methods are accepted for MMSZ5258CT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5258CT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5258CT1G?
MMSZ5258CT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5258CT1G 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 MMSZ5258CT1G?
For technical support, including MMSZ5258CT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5258CT1G requirements.
6.How does Aetrix verify that MMSZ5258CT1G is sourced from the original manufacturer or authorized distributors?
All MMSZ5258CT1G 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 MMSZ5258CT1G meets industry standards.
7.What is the process for return or replacement of MMSZ5258CT1G?
All MMSZ5258CT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5258CT1G, 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 MMSZ5258CT1G part is unused and in its original packaging.
Return procedure for MMSZ5258CT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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