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Diodes Incorporated MMBZ5246BT-7-F
- Part No.:
- MMBZ5246BT-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOT-523
- Datasheet:
-
MMBZ5246BT-7-F.pdf
- Description:
- DIODE ZENER 16V 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:6,749
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Product details
Overview
MMBZ5246BT-7-F from Diodes Incorporated is a 16 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 7.8 mA test current, 17 Ω dynamic impedance at 1 kHz, and 0.1 μA reverse leakage at 12 V, used for precision voltage regulation and overvoltage protection in space-constrained power management circuits.
For engineers reviewing the MMBZ5246BT-7-F datasheet, MMBZ5246BT-7-F pinout, MMBZ5246BT-7-F application, or MMBZ5246BT-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (833 °C/W), low capacitance (~15 pF), RoHS-compliant matte tin plating, and suitability for automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode employs planar die construction for stable breakdown characteristics and low temperature coefficient. It operates within -65 °C to +150 °C and delivers regulated voltage reference with 15.2 V minimum and 16.8 V maximum Zener voltage at 7.8 mA test current.
Its 150 mW power dissipation is derated linearly above 25 °C ambient per Fig. 1, and it exhibits typical total capacitance of ~15 pF at 16 V, making it suitable for low-noise analog reference and ESD-clamped signal line protection where parasitic capacitance must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, 15.2–16.8 V range at 7.8 mA - defines precise clamping threshold for voltage-sensitive circuits |
| Power Dissipation (PD) | 150 mW at TA = 25 °C - limits continuous regulation current to ~9.4 mA at 16 V |
| Zener Impedance (ZZT) | 17 Ω at 1 kHz, 7.8 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 μA at VR = 12 V - enables ultra-low quiescent current in battery-backed reference paths |
| Thermal Resistance (RθJA) | 833 °C/W - requires careful PCB copper area design to maintain junction temperature below 150 °C |
| Package | SOT-523 - 1.6 mm × 0.8 mm footprint ideal for high-density portable electronics |
| RoHS Compliance | Lead-free, halogen-free molding compound (Date Code UO+) - meets IPC-J-STD-020D Level 1 moisture sensitivity |
Pinout & Package
SOT-523 is a 3-terminal ultra-small plastic package with anode-cathode-anode configuration; polarity is marked by cathode band on top view. Device uses alloy 42 leadframe with matte tin plating for solderability and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current entry terminal in forward bias | Connected to lower-potential node during regulation; forms return path for Zener current |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; voltage referenced to this pin during clamping operation |
| Anode (Pin 3) | Second anode connection | Internally tied to Pin 1; provides mechanical stability and thermal path in SOT-523 dual-anode layout |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT-523 footprint | 1.6 mm × 0.8 mm area - saves >60% board space vs. SOT-23 in portable power rails |
| Low Zener impedance (17 Ω) | Minimizes output voltage deviation under ±2 mA load change - critical for ADC reference stability |
| 0.1 μA reverse leakage @ 12 V | Enables <1 nW standby power loss - suitable for energy-harvesting and coin-cell applications |
| Planar die construction | Ensures tight VZ distribution (±5%) and repeatable breakdown behavior across production lots |
| Lead-free & green compound | Meets JEDEC J-STD-020D Level 1 and RoHS Directive 2011/65/EU - supports global environmental compliance |
Applications
| Portable USB Power Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 5 V USB supply rail in handheld diagnostic tools with microcontroller ADC input. IC Role / Device Role / Timing Role: Zener reference diode providing stable 16 V clamp to protect ADC input from transient overvoltage. Use Value: Prevents ADC saturation during hot-plug events while adding only 15 pF loading to the sensing node. | Use Scenario: Biasing and protecting bridge amplifier inputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing clean 16 V local supply for op-amp biasing and overvoltage clamping. Use Value: Maintains 0.1 μA leakage to preserve loop current accuracy while enabling fast transient suppression via 17 Ω ZZT. |
| Automotive Body Control Module | Medical Wearable Battery Management |
Use Scenario: Clamping LIN bus transceiver I/O pins against load-dump spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Low-capacitance Zener diode placed directly at transceiver pin for ESD and surge protection. Use Value: 15 pF capacitance avoids signal integrity degradation on 20 kbps LIN signals; 150 mW rating handles ISO 7637-2 Pulse 1/2a surges. | Use Scenario: Regulating reference voltage for fuel gauge IC in lithium coin-cell–powered glucose monitors. IC Role / Device Role / Timing Role: Ultra-low-leakage shunt regulator supplying stable 16 V to analog front-end circuitry. Use Value: 0.1 μA leakage extends 10-year shelf life by minimizing self-discharge; SOT-523 fits within 3 mm × 3 mm PCB area budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C16L-7-F | Same 16 V nominal, but SOD-523 package (slightly larger); 20 Ω ZZT, 0.5 μA IR @ 12 V | Higher leakage reduces suitability for ultra-low-power medical sensors | Select when board layout allows 1.8 mm × 1.2 mm footprint and tighter ZZT tolerance not required |
| MMBZ5246BS-7-F | Identical electrical specs, but SOT-23 package (3.0 mm × 1.4 mm); same 17 Ω ZZT, 0.1 μA IR | Larger size eases hand-soldering but increases parasitic inductance in RF-sensitive designs | Select when manual rework is needed or thermal mass requirements exceed SOT-523 capability |
Compared with BZX584C16L-7-F and MMBZ5246BS-7-F, MMBZ5246BT-7-F offers the smallest footprint and lowest leakage, making it optimal for miniaturized, battery-critical systems-though its 833 °C/W RθJA demands careful thermal pad design versus the SOT-23 variant's lower thermal resistance.
Availability
MMBZ5246BT-7-F is available at Aetrix Electronics and suitable for portable USB power monitoring, industrial sensor signal conditioning, and automotive body control modules requiring stable component supply with full traceability and lifecycle support.
Supply support for MMBZ5246BT-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 and manufacturing operations across Asia and the Americas.
This device belongs to the MMBZ52xxBT series of ultra-small Zener diodes designed specifically for space-constrained, high-reliability voltage reference and protection applications in portable, industrial, and automotive electronics.
FAQ
What is the maximum reverse voltage before breakdown for MMBZ5246BT-7-F?
The nominal Zener voltage is 16 V, with a guaranteed range of 15.2 V to 16.8 V at 7.8 mA test current. Breakdown begins gradually below this range; the device is specified to maintain ≤0.1 μA leakage up to 12 V, and full regulation occurs only above the minimum VZ threshold under defined test conditions.
Can MMBZ5246BT-7-F be used in place of a 15 V Zener diode?
No - MMBZ5246BT-7-F is strictly a 16 V device (15.2–16.8 V range). Substituting it for a 15 V Zener would raise the clamping voltage by ≥0.2 V, potentially exceeding downstream component ratings. For 15 V regulation, use MMBZ5245BT-7-F (14.25–15.75 V range) instead.
Is the SOT-523 package compatible with standard reflow profiles?
Yes - the device is qualified for lead-free reflow per JEDEC J-STD-020D Level 1, with peak temperature up to 260 °C. Its moisture sensitivity level (MSL) 1 means floor life is unlimited at ≤30 °C/60% RH, eliminating bake requirements prior to assembly.
How does the dual-anode SOT-523 configuration affect circuit layout?
The SOT-523 has two anode terminals (Pins 1 and 3) internally shorted; both must be routed to the same net. This configuration improves thermal conduction and mechanical anchoring but requires symmetric pad design - asymmetric traces may induce thermal stress or solder joint voiding during reflow.
MMBZ5246BT-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 150 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
MMBZ5246BT-7-F FAQ
1.How can I place an order for MMBZ5246BT-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5246BT-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 MMBZ5246BT-7-F reliable?
The price and inventory of MMBZ5246BT-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 MMBZ5246BT-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5246BT-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5246BT-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5246BT-7-F?
MMBZ5246BT-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5246BT-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 MMBZ5246BT-7-F?
For technical support, including MMBZ5246BT-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5246BT-7-F requirements.
6.How does Aetrix verify that MMBZ5246BT-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5246BT-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 MMBZ5246BT-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5246BT-7-F?
All MMBZ5246BT-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5246BT-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 MMBZ5246BT-7-F part is unused and in its original packaging.
Return procedure for MMBZ5246BT-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5246BT-7-F Tags
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