My Inquiry
My Account
Diodes Incorporated MMSZ5246BQ-7-F
- Part No.:
- MMSZ5246BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5246BQ-7-F.pdf
- Description:
- DIODE ZENER 16V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ5246BQ-7-F from Diodes Incorporated is an AEC-Q101-qualified 16V, ±5% tolerance Zener diode in SOD123 package, rated for 500mW power dissipation at TL=+75°C and 370mW at TA=+25°C, with 17Ω zener impedance at 7.8mA test current and 0.1µA reverse leakage at 12V. It serves as a precision voltage reference or overvoltage clamp in automotive power rail monitoring circuits.
For engineers reviewing the MMSZ5246BQ-7-F datasheet, MMSZ5246BQ-7-F pinout, MMSZ5246BQ-7-F application, or MMSZ5246BQ-7-F equivalent, key selection criteria include its automotive qualification, tight 15.2–16.8V zener voltage range, low 0.1µA IR at VR=12V, and SOD123 thermal performance under reflow and board-level derating conditions.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its 17Ω dynamic impedance at IZT = 7.8mA ensures minimal output voltage deviation under transient current changes, while the 0.1µA reverse leakage at VR = 12V supports low-power standby circuit integrity.
The device uses a planar epitaxial construction with matte tin-plated alloy 42 leadframe and green molding compound (UL 94V-0), enabling compatibility with lead-free reflow profiles and meeting AEC-Q101 stress test requirements for temperature cycling, HTRB, and ESD (HBM ≥ 2kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.0V nominal, 15.2–16.8V range at 7.8mA - defines regulated voltage tolerance band for reference stability |
| Power Dissipation (PD) | 370mW @ TA=+25°C - maximum continuous power on FR-4 PCB with 1-inch copper pad |
| Zener Impedance (ZZT) | 17Ω @ IZT=7.8mA - low dynamic resistance enables tight regulation under load transients |
| Reverse Leakage (IR) | 0.1µA @ VR=12V - ensures negligible standby current in undervoltage detection circuits |
| Thermal Resistance (RθJA) | 338°C/W - determines junction temperature rise under ambient-constrained PCB layouts |
| Operating Temperature | −65°C to +150°C - supports under-hood automotive environments without derating loss |
Pinout & Package
Package: SOD123 surface-mount plastic case with cathode band marking; dimensions: 2.65mm × 1.55mm × 1.05mm (L × D × A); weight ≈ 0.01g; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated node; forms reference ground return path |
| Cathode | Reverse-biased breakdown terminal / Zener voltage output | Connected to higher-potential rail; delivers stabilized 16V output when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| Green molding compound | Halogen- and antimony-free UL 94V-0 material supporting RoHS 2 and ELV compliance |
| SOD123 footprint | Standardized 2.65×1.55mm outline compatible with high-speed pick-and-place and reflow assembly |
| Low leakage at 12V | 0.1µA IR enables use in battery-backed voltage supervisors without drain penalty |
Applications
| Automotive Power Rail Monitoring | Industrial Sensor Reference Supply |
|---|---|
Use Scenario: Monitoring 12V battery-derived rails in ADAS camera modules for brown-out detection. IC Role / Device Role / Timing Role: Zener clamping element providing stable 16V reference to comparator input. Use Value: Tight 15.2–16.8V tolerance ensures accurate trip point across −40°C to +125°C operating range. | Use Scenario: Generating precision bias voltage for analog front-end amplifiers in factory-floor pressure sensors. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed reference against which sensor output is measured. Use Value: 17Ω ZZT minimizes reference shift during amplifier supply current surges up to 10mA. |
| USB-C PD Overvoltage Protection | Smart Meter Voltage Supervisor |
Use Scenario: Clamping transient spikes on 20V USB-C power delivery lines before DC-DC converter input. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration >16V excursions. Use Value: 500mW peak power rating handles 100ns/10A surge events without degradation per IEC 61000-4-5 Level 3. | Use Scenario: Validating main supply integrity in utility smart meters during grid switching events. IC Role / Device Role / Timing Role: Low-leakage voltage threshold detector feeding microcontroller reset logic. Use Value: 0.1µA IR at 12V prevents measurable battery drain in 10-year meter deployments. |
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-C16-Q-7-F | Same 16V nominal, but SOT-23 package; 400mW PD @ TA=25°C; 40Ω ZZT @ 5mA | Higher thermal resistance limits sustained current in compact layouts; less suitable for high-reliability automotive | Select only if SOT-23 footprint required and derating to 250mW is acceptable |
| 1N4744A | Through-hole DO-41; 14V nominal; 1W PD; 20Ω ZZT @ 25mA; no AEC-Q101 qualification | Not suitable for automated SMT production or under-hood temperature cycling | Use only in legacy through-hole designs where board space and reliability requirements are relaxed |
Compared with BZX84-C16-Q-7-F and 1N4744A, MMSZ5246BQ-7-F offers superior thermal performance in SMT layouts, tighter voltage tolerance, and automotive-grade reliability-making it optimal for new automotive and industrial designs requiring long-term stability and zero-defect assembly.
Availability
MMSZ5246BQ-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and USB-C PD protection requiring stable component supply across extended temperature ranges and high-volume manufacturing cycles.
Supply support for MMSZ5246BQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The MMSZ52xxB series belongs to Diodes' automotive-qualified Zener portfolio, engineered specifically for robust voltage reference and overvoltage protection in harsh-environment electronic control units.
FAQ
What is the maximum steady-state power dissipation for MMSZ5246BQ-7-F on a standard FR-4 PCB?
The device dissipates up to 370mW continuously at TA = +25°C when mounted on FR-4 with a 1-inch copper pad layout. Derating begins linearly above +25°C at 3.0mW/°C, reaching 0mW at +150°C ambient per the power derating curve in DS18010 Rev. 28.
Does MMSZ5246BQ-7-F have a defined temperature coefficient for its zener voltage?
Yes - Figure 6 in the datasheet shows a typical temperature coefficient of approximately +0.06%/°C for 16V Zeners in the MMSZ524x series. This positive TC means VZ increases by ~9.6mV per °C rise, critical for precision reference designs operating across −40°C to +125°C.
Can MMSZ5246BQ-7-F be used in place of a 15V Zener in a voltage supervisor circuit?
No - its nominal 16V rating and 15.2–16.8V range exceed typical 15V supervisor thresholds. Substituting would raise trip voltage by ≥0.2V, potentially causing late or missed resets. Use MMSZ5245B (15V) instead for exact 15V applications.
Is the SOD123 package of MMSZ5246BQ-7-F compatible with IPC-7351B standard land patterns?
Yes - the recommended pad layout (X = 0.900mm, X1 = 4.050mm, Y = 0.950mm) aligns with IPC-7351B Class B for SOD-123, ensuring reliable solder joint formation and mechanical stability during thermal cycling and board flexure testing.
MMSZ5246BQ-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 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
MMSZ5246BQ-7-F FAQ
1.How can I place an order for MMSZ5246BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5246BQ-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 MMSZ5246BQ-7-F reliable?
The price and inventory of MMSZ5246BQ-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 MMSZ5246BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5246BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5246BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5246BQ-7-F?
MMSZ5246BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5246BQ-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 MMSZ5246BQ-7-F?
For technical support, including MMSZ5246BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5246BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5246BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5246BQ-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 MMSZ5246BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5246BQ-7-F?
All MMSZ5246BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5246BQ-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 MMSZ5246BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5246BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5246BQ-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…
