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Diodes Incorporated MMBZ5246BS-7
- Part No.:
- MMBZ5246BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- -
- Datasheet:
-
MMBZ5246BS-7.pdf
- Description:
- DIODE ZENER ARRAY 16V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:18
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Product details
Overview
MMBZ5246BS-7 from Diodes Incorporated is a dual isolated 16 V Zener diode in SOT-363 package, rated for 200 mW power dissipation, 7.8 mA test current, and 17 Ω dynamic impedance at 1 kHz; used for precision voltage reference and overvoltage protection in compact DC power rails.
For engineers reviewing the MMBZ5246BS-7 datasheet, MMBZ5246BS-7 pinout, MMBZ5246BS-7 application, or MMBZ5246BS-7 equivalent, key selection criteria include nominal Zener voltage (16 V ±5%), low leakage (<0.1 μA at 12 V), thermal resistance (625 °C/W), and dual-diode isolation in ultra-small surface-mount format.
Technical Context
This dual-Zener device integrates two electrically isolated 16 V Zener junctions in a single SOT-363 package, enabling independent clamping or reference functions without cross-coupling. Each diode exhibits tight voltage tolerance (15.2–16.8 V), low dynamic impedance (17 Ω at 7.8 mA), and minimal reverse leakage (≤0.1 μA at VR = 12 V).
Designed for operation across –65 °C to +150 °C, it maintains stable regulation under transient conditions with peak surge power handling up to 1 W (1 ms pulse) and derates linearly above 25 °C ambient per the published curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, 15.2–16.8 V range at 7.8 mA - ensures ±5% regulation accuracy in feedback or clamp circuits |
| Power Dissipation (PD) | 200 mW at 25 °C - defines maximum continuous DC power before thermal shutdown in FR4 layouts |
| Zener Impedance (ZZT) | 17 Ω at 1 kHz, 7.8 mA - determines AC ripple rejection and regulation stability under load variation |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 12 V - critical for low-power standby circuits and high-impedance sensing nodes |
| Thermal Resistance (RθJA) | 625 °C/W - requires careful PCB copper area design to sustain full power at elevated ambient temperatures |
| Package | SOT-363 - enables dual-Zener functionality in <2.2 mm × 1.35 mm footprint, compatible with automated pick-and-place |
Pinout & Package
SOT-363 package with six terminals: two anodes (A1, A2), two cathodes (C1, C2), and two no-connect (NC) pins. Dual diodes share no internal connection; each operates independently.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Cathode of Diode 1 | Connected to regulated node or clamp return path; reverse-biased during Zener operation |
| A1 | Anode of Diode 1 | Common reference or ground tie point for first Zener; polarity must match schematic symbol |
| C2 | Cathode of Diode 2 | Independent clamp/reference output; electrically isolated from C1/A1 pair |
| A2 | Anode of Diode 2 | Second independent reference node; supports dual-rail or redundancy schemes |
| NC | No Connect | Unbonded terminal; must remain unconnected and unstubbed on PCB |
| NC | No Connect | Unbonded terminal; no routing or thermal pad required |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated Zener junctions | Enables independent voltage reference and protection paths in one footprint, reducing board space by ~40% vs. discrete dual-SOD-323 solution |
| 200 mW total power rating | Supports sustained 16 V regulation at ≤12.5 mA DC current, sufficient for op-amp biasing and microcontroller reset supervision |
| Lead-free/RoHS-compliant construction | Matte tin-plated Alloy 42 leadframe meets IPC-J-STD-020D Level 1 moisture sensitivity, eliminating reflow concerns |
| Tight Zener voltage tolerance | ±5% (15.2–16.8 V) at 7.8 mA ensures predictable trip points in overvoltage detection without calibration |
| Low 0.1 μA leakage at 12 V | Preserves battery life in always-on monitoring circuits and avoids false triggers in high-impedance comparator inputs |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Protecting 16-bit ADC input stages from ESD-induced transients in factory-floor pressure/temperature transmitters. IC Role / Device Role / Timing Role: Dual-Zener provides bidirectional clamping (C1-A1 for positive swing, C2-A2 for negative swing) while maintaining signal integrity below 16 V. Use Value: Prevents ADC saturation and latch-up without adding series resistance that degrades SNR, leveraging matched 16 V breakdown across both diodes. | Use Scenario: Clamping CC1/CC2 lines in USB-C receptacles against 20 V fault events during hot-plug insertion. IC Role / Device Role / Timing Role: One diode clamps CC1-to-GND, the other clamps CC2-to-GND; NC pins allow clean layout separation between data and power domains. Use Value: Meets USB-IF ESD immunity requirements (±15 kV air, ±8 kV contact) with sub-1 ns response and no parasitic coupling between channels. |
| Microcontroller Reset Supervision | Low-Power IoT Node Reference |
Use Scenario: Generating a stable 16 V reference for external brown-out detector ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Zener operates in reverse-biased steady state, sourcing <10 μA to detector's sense input while rejecting ripple. Use Value: Eliminates need for external voltage divider and improves reset threshold accuracy to ±0.8 V over temperature (–40 to +85 °C). | Use Scenario: Providing precise 16 V bias for RF front-end LNA biasing in NB-IoT cellular modules operating on coin-cell batteries. IC Role / Device Role / Timing Role: Second Zener supplies regulated gate voltage; ultra-low 0.1 μA leakage extends shelf life beyond 10 years. Use Value: Enables consistent gain and noise figure across battery discharge cycle without active regulation overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16LT1G | Single 16 V Zener in SOT-23; no dual-diode integration; 30 Ω ZZT, 100 nA IR at 12 V | Requires two devices for dual-channel use; higher impedance reduces regulation fidelity under load | Select when board area allows separate placement and lower leakage is prioritized over integration |
| MMBZ5246B-7 | Same Zener specs but in SOT-23-3L (single diode); no second isolated junction; identical VZ, IZT, ZZT | Lacks dual-channel capability; unsuitable for differential clamping or redundant references | Choose only when single-Zener function suffices and SOT-23 footprint is preferred for legacy layout compatibility |
Compared with BZX84-C16LT1G and MMBZ5246B-7, MMBZ5246BS-7 uniquely delivers two isolated 16 V Zeners in one SOT-363, reducing component count by one device and PCB area by 35%, while maintaining matching voltage characteristics essential for balanced clamping.
Availability
MMBZ5246BS-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery systems, microcontroller reset supervision, and low-power IoT node reference designs requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMBZ5246BS-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 centers across Asia and manufacturing in China, Taiwan, and the US.
The MMBZ52xxBS series targets space-constrained, high-reliability applications requiring dual-voltage-reference or dual-clamp functionality in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current the MMBZ5246BS-7 can handle without degradation?
The device is rated for 200 mW total power dissipation at 25 °C ambient. At its nominal 16 V Zener voltage, this corresponds to a maximum continuous reverse current of 12.5 mA. Derating is required above 25 °C per the published 625 °C/W thermal resistance curve; at 70 °C ambient, max current drops to ~8.3 mA.
Can both Zener diodes in the MMBZ5246BS-7 be used simultaneously in the same circuit?
Yes - the two Zener diodes are fully electrically isolated, allowing simultaneous use in independent signal paths. For example, C1/A1 can clamp a 16 V rail while C2/A2 regulates a separate 16 V bias, provided total power dissipation remains within 200 mW and thermal design accommodates combined heating.
Is the SOT-363 package of MMBZ5246BS-7 compatible with standard reflow profiles for lead-free assembly?
Yes - the device is rated for Moisture Sensitivity Level 1 per J-STD-020D and uses matte tin plating over Alloy 42. It supports standard IPC/JEDEC J-STD-020 Class 3 reflow profiles (peak 260 °C, 60-second duration above 217 °C) without preconditioning or baking.
How does the 17 Ω Zener impedance affect performance in a voltage reference application?
A 17 Ω dynamic impedance means the output voltage varies by ~17 mV per 1 mA change in reverse current. In a reference application with 1 mA load variation, this introduces ±17 mV error - acceptable for 12-bit systems (LSB ≈ 24 mV at 50 V full scale) but may require buffering for higher-precision 16-bit ADC references.
MMBZ5246BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Configuration:
- -
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ5246BS-7 FAQ
1.How can I place an order for MMBZ5246BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5246BS-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 MMBZ5246BS-7 reliable?
The price and inventory of MMBZ5246BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5246BS-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5246BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5246BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5246BS-7?
MMBZ5246BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5246BS-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 MMBZ5246BS-7?
For technical support, including MMBZ5246BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5246BS-7 requirements.
6.How does Aetrix verify that MMBZ5246BS-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5246BS-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 MMBZ5246BS-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5246BS-7?
All MMBZ5246BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5246BS-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 MMBZ5246BS-7 part is unused and in its original packaging.
Return procedure for MMBZ5246BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5246BS-7 Tags
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Diodes Incorporated
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