My Inquiry
My Account
Diodes Incorporated MMSZ5248BQ-7-F
- Part No.:
- MMSZ5248BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5248BQ-7-F.pdf
- Description:
- DIODE ZENER 18V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5248BQ-7-F from Diodes Incorporated is an AEC-Q101 qualified 18 V, 500 mW surface-mount Zener diode in SOD123 package, with nominal Zener voltage 17.1–18.9 V at 7.0 mA test current, 21 Ω dynamic impedance at IZT, and maximum reverse leakage of 0.1 µA at 14 V. It serves as a precision voltage reference or overvoltage clamp in automotive power rail monitoring circuits.
For engineers reviewing the MMSZ5248BQ-7-F datasheet, MMSZ5248BQ-7-F pinout, MMSZ5248BQ-7-F application, or MMSZ5248BQ-7-F equivalent, key selection criteria include Zener voltage tolerance (±5%), low leakage (<0.1 µA), automotive qualification, thermal resistance (338 °C/W), and SOD123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation under controlled current conditions. Its 18 V nominal Zener voltage exhibits a positive temperature coefficient (~0.07 %/°C per Figure 6), and it delivers stable regulation across -65 °C to +150 °C operating range.
The device is rated for 500 mW power dissipation at lead temperature (TL = +75 °C) and 370 mW at ambient (TA = +25 °C) on FR-4 PCB with 1-inch copper pad. Its 21 Ω Zener impedance at 7.0 mA ensures minimal voltage deviation under load variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.1–18.9 V at 7.0 mA - defines tight regulation window for 18 V reference designs |
| Power Dissipation (PD) | 370 mW @ TA = +25 °C - sets max continuous DC power on standard PCB layout |
| Zener Impedance (ZZT) | 21 Ω @ IZT = 7.0 mA - determines output voltage stability under current step changes |
| Reverse Leakage (IR) | 0.1 µA @ VR = 14 V - enables ultra-low standby current in battery-backed circuits |
| Thermal Resistance (RθJA) | 338 °C/W - informs derating requirements above +25 °C ambient |
| Operating Temperature | -65 °C to +150 °C - supports under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics reliability per stress test standards |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 1.55 mm width × 2.65 mm length × 1.05 mm height; matte tin-plated alloy 42 leadframe; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower potential side in shunt regulation; forms return path for Zener current |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connected to regulated voltage node; sinks current to maintain VZ |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - ensures reliability for engine control, body electronics, and ADAS modules |
| Green construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) - meets global environmental mandates |
| Lead-free plating | Matte tin annealed over Alloy 42 - RoHS-compliant, solderable per MIL-STD-202 Method 208 |
| Automated assembly ready | SOD123 footprint with defined pad layout (X=0.9 mm, Y=0.95 mm) - optimized for pick-and-place accuracy |
Applications
| Automotive Power Rail Monitoring | Industrial Sensor Reference Supply |
|---|---|
Use Scenario: Monitoring 12 V battery-derived rails in engine control units for undervoltage/overvoltage detection. IC Role / Device Role: Shunt voltage reference providing stable 18 V threshold for comparator input. Use Value: Tight ±5% VZ tolerance and 0.1 µA leakage ensure accurate trip points without loading sensitive analog inputs. |
Use Scenario: Providing stable bias voltage for precision analog front-ends in factory automation pressure sensors. IC Role / Device Role: Low-drift Zener reference for ADC reference buffer circuitry. Use Value: 21 Ω ZZT minimizes output impedance variation across temperature, improving measurement repeatability. |
| LED Driver Overvoltage Clamp | Low-Power IoT Node Voltage Supervisor |
Use Scenario: Protecting constant-current LED driver ICs from transient surges on 24 V supply lines. IC Role / Device Role: Transient voltage clamp absorbing energy during load dump events. Use Value: 500 mW peak power rating and 18 V clamping level prevent driver IC damage while maintaining fast response. |
Use Scenario: Enabling wake-up-on-voltage-threshold in battery-powered smart meters and asset trackers. IC Role / Device Role: Ultra-low-leakage voltage reference for comparator-based brown-out detection. Use Value: 0.1 µA reverse leakage extends shelf life and operational runtime in multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | 18 V ±5%, 300 mW PD, SOT-23 package, 40 Ω ZZT @ 5 mA | Lower power rating and higher impedance limit use in high-accuracy or high-current regulation | Select when board space is constrained and 300 mW suffices; verify thermal margin on small pads |
| MMSZ5248BS-7-F | Identical electrical specs but commercial-grade (non-AEC-Q101), same SOD123 package | Not qualified for automotive use; suitable only for industrial or consumer applications | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with BZX84-C18LT1G and MMSZ5248BS-7-F, MMSZ5248BQ-7-F uniquely combines automotive qualification, 500 mW power handling, and 21 Ω low-impedance regulation-making it optimal for safety-critical voltage supervision where reliability and thermal robustness are mandatory.
Availability
MMSZ5248BQ-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and IoT node voltage supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MMSZ5248BQ-7-F 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, specializing in high-reliability components for automotive, industrial, and computing markets.
MMSZ5248BQ-7-F belongs to the MMSZ52xxB automotive Zener diode family, engineered for precision voltage reference and overvoltage protection in harsh-environment electronics where AEC-Q101 compliance and low leakage are essential.
FAQ
What is the maximum reverse voltage before breakdown for MMSZ5248BQ-7-F?
The nominal Zener voltage is 18 V with a tolerance of ±5%, meaning breakdown occurs between 17.1 V and 18.9 V at the specified 7.0 mA test current. Below 14 V, reverse leakage remains ≤0.1 µA; no hard "maximum reverse voltage" is defined outside this regulation band.
Can MMSZ5248BQ-7-F be used in place of a 15 V Zener diode?
No - MMSZ5248BQ-7-F is specifically rated for 18 V nominal Zener voltage. Substituting it for a 15 V part (e.g., MMSZ5245BQ-7-F) would raise the regulation threshold by 3 V, potentially causing system malfunction in voltage-sensitive circuits like reset generators or overvoltage detectors.
Is the SOD123 package compatible with reflow soldering per J-STD-020?
Yes - the device is rated for moisture sensitivity level 1 and features matte tin plating qualified per MIL-STD-202, Method 208. Its SOD123 package supports standard Pb-free reflow profiles (peak 260 °C) without degradation, provided the 1-inch copper pad layout per datasheet is followed.
How does temperature affect the Zener voltage of MMSZ5248BQ-7-F?
Per Figure 6 in DS18010 Rev. 28, the MMSZ5248B (18 V type) exhibits a positive temperature coefficient of approximately +0.07 %/°C. This means VZ increases by ~12.6 mV/°C near room temperature - critical for high-precision references where drift must be compensated in firmware or hardware.
MMSZ5248BQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5248BQ-7-F FAQ
1.How can I place an order for MMSZ5248BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5248BQ-7-F 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 MMSZ5248BQ-7-F reliable?
The price and inventory of MMSZ5248BQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5248BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5248BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5248BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5248BQ-7-F?
MMSZ5248BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5248BQ-7-F 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 MMSZ5248BQ-7-F?
For technical support, including MMSZ5248BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5248BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5248BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5248BQ-7-F 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 MMSZ5248BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5248BQ-7-F?
All MMSZ5248BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5248BQ-7-F, 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 MMSZ5248BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5248BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5248BQ-7-F 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…
