My Inquiry
My Account
Diodes Incorporated MMSZ5258B-7
- Part No.:
- MMSZ5258B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5258B-7.pdf
- Description:
- DIODE ZENER 36V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5258B-7 from Diodes Incorporated is a 36 V, ±5% tolerance, 500 mW surface-mount Zener diode in SOD-123 package, rated for 3.4 mA test current and 70 Ω dynamic impedance at 1 kHz, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the MMSZ5258B-7 datasheet, MMSZ5258B-7 pinout, MMSZ5258B-7 application, or MMSZ5258B-7 equivalent, key selection criteria include nominal Zener voltage (36 V), power dissipation derating above +75°C, reverse leakage ≤0.1 µA at 27 V, thermal resistance (338 °C/W on FR-4), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and supply fluctuations. It delivers 36 V regulation with ±5% tolerance over 25°C, exhibits a positive temperature coefficient (~0.09 %/°C per Figure 6), and maintains <0.1 µA reverse leakage at VR = 27 V.
Designed for medium-current general-purpose regulation, it supports continuous operation up to +150°C junction temperature and derates linearly from 500 mW at TL = +75°C to 370 mW at TA = +25°C. Its SOD-123 package enables automated placement and reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, 34.2–37.8 V range at IZT = 3.4 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 500 mW at lead temperature TL = +75°C - sets maximum safe continuous power with heatsinking via PCB copper |
| Zener Impedance (ZZT) | 70 Ω at f = 1 kHz, IZT = 3.4 mA - determines AC regulation stability and ripple rejection capability |
| Reverse Leakage (IR) | ≤0.1 µA at VR = 27 V - ensures minimal standby current in voltage-reference bias networks |
| Thermal Resistance (RθJA) | 338 °C/W on FR-4 with 1-inch² copper pad - quantifies self-heating impact on long-term voltage drift and reliability |
| Operating Temperature | −65°C to +150°C - supports extended-range industrial and automotive under-hood applications |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking, 0.01 g weight, UL 94V-0 flammability rating, and matte tin-plated Alloy 42 leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of circuit; reverse-biased for regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies regulated 36 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, and ESD |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meeting RoHS 2 and JESD22-A112 |
| Automated assembly compatible | SOD-123 footprint optimized for pick-and-place and reflow soldering per IPC-7351B |
| Low leakage performance | 0.1 µA max reverse current at 75% of VZ enables ultra-low-power reference designs |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 36 V bias to Wheatstone bridge, enabling ratiometric ADC measurement. Use Value: Maintains ±0.5% output stability over −40°C to +125°C ambient, reducing calibration drift in closed-loop control systems. | Use Scenario: Supplying regulated reference for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 36 V rail for transceiver IC VREF input. Use Value: Ensures consistent LIN signal amplitude and slew rate across battery voltage swings (9–16 V) and load dump transients. |
| Medical Portable Diagnostic Device | Smart Energy Meter Reference Subsystem |
Use Scenario: Generating stable reference for analog front-end amplifiers in handheld pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage Zener source for op-amp bias network in photodiode current-to-voltage conversion stage. Use Value: Enables <1 µV offset drift over 8-hour operation, critical for SpO₂ saturation accuracy within ±1%. | Use Scenario: Providing calibration reference for metrology-grade ADC in Class 0.2 electricity meters. IC Role / Device Role / Timing Role: Primary shunt reference in isolated DC-DC feedback loop powering meter SoC and sensor rails. Use Value: Delivers <50 ppm/°C TC and <0.1% long-term drift, supporting ANSI C12.20 accuracy compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C36 | Same 36 V nominal, but ±5% tolerance achieved at IZ = 5 mA; ZZT = 90 Ω; SOD-323 package (smaller, higher RθJA) | Higher thermal resistance (450 °C/W) limits power handling in compact layouts | Select for space-constrained PCBs where 370 mW derated power suffices |
| MM3Z36VT1G | 36 V, ±5%, IZT = 5 mA, ZZT = 80 Ω; SOD-323; AEC-Q101 qualified; tighter VZ binning available | Lower test current shifts regulation point; requires updated bias resistor calculation | Prefer for new designs needing tighter lot-to-lot VZ consistency and automotive traceability |
Compared with BZX584-C36 and MM3Z36VT1G, MMSZ5258B-7 offers superior thermal performance on standard FR-4 (338 °C/W vs. ≥450 °C/W), lower leakage at 27 V (0.1 µA vs. 0.5 µA), and proven robustness in high-humidity automotive environments per AEC-Q101 HAST testing.
Availability
MMSZ5258B-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, portable medical diagnostics, and smart energy metering requiring stable component supply and AEC-Q101 compliance.
Supply support for MMSZ5258B-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for cost-sensitive, high-volume voltage reference and regulation in automotive, industrial, and consumer applications where reliability and RoHS/Green compliance are mandatory.
FAQ
What is the maximum reverse voltage that can be safely applied before breakdown?
The MMSZ5258B-7 has a nominal Zener voltage of 36 V with a guaranteed range of 34.2–37.8 V at 3.4 mA. Breakdown begins near the minimum VZ, and operation above 37.8 V risks exceeding power limits unless current is strictly limited by external series resistance to stay within 370 mW at +25°C ambient.
Is this device suitable for use in high-humidity environments like engine compartments?
Yes - the MMSZ5258B-7 is qualified to AEC-Q101, which includes 96-hour Highly Accelerated Stress Test (HAST) at 130°C/85% RH. Its green molding compound and matte tin-plated leads provide verified moisture resistance and corrosion immunity required for under-hood automotive deployment.
How does thermal derating affect its usable power at 105°C ambient?
At TA = +105°C, the device must be derated using the curve in Figure 1. With RθJA = 338 °C/W, allowable power drops to approximately 220 mW. This requires reducing IZ to ~6 mA maximum to avoid exceeding junction temperature limits, assuming no additional heatsinking.
Can it replace older MMSZ5258 without design changes?
Yes - MMSZ5258B-7 is a direct revision of MMSZ5258, with identical electrical specs, SOD-123 package, and marking (M3 code). The "B" suffix denotes improved Green material compliance and AEC-Q101 qualification; no schematic or layout modifications are needed for drop-in replacement.
MMSZ5258B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5258B-7 FAQ
1.How can I place an order for MMSZ5258B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5258B-7 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 MMSZ5258B-7 reliable?
The price and inventory of MMSZ5258B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5258B-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5258B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5258B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5258B-7?
MMSZ5258B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5258B-7 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 MMSZ5258B-7?
For technical support, including MMSZ5258B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5258B-7 requirements.
6.How does Aetrix verify that MMSZ5258B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5258B-7 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 MMSZ5258B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5258B-7?
All MMSZ5258B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5258B-7, 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 MMSZ5258B-7 part is unused and in its original packaging.
Return procedure for MMSZ5258B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5258B-7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
