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Diodes Incorporated MMBZ5256BTS-7-F
- Part No.:
- MMBZ5256BTS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5256BTS-7-F.pdf
- Description:
- DIODE ZENER ARRAY 30V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:6,678
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Product details
Overview
MMBZ5256BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 30 V ±5% Zener elements with 4.2 mA test current, 49 Ω dynamic impedance at 1 kHz, and 0.1 µA reverse leakage at 23 V, used for precision voltage reference and overvoltage protection in compact power management circuits.
For engineers reviewing the MMBZ5256BTS-7-F datasheet, MMBZ5256BTS-7-F pinout, MMBZ5256BTS-7-F application, or MMBZ5256BTS-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), low thermal resistance (625 °C/W), triple-diode isolation in ultra-small footprint, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device integrates three independent Zener diodes in a single SOT363 package, each rated for 200 mW total power dissipation and operating across –65 °C to +150 °C. All diodes share identical electrical specs: 30 V nominal Zener voltage, 4.2 mA test current, and 49 Ω impedance at 1 kHz.
No internal connection exists between the three Zener elements - terminals are fully isolated, enabling independent biasing and referencing. The device uses matte tin-plated Alloy 42 leadframe and meets J-STD-020D Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 30 V nominal, 28.5–31.5 V range at 4.2 mA - ensures stable reference within ±5% tolerance under standard test conditions. |
| Power Dissipation | 200 mW per diode - supports continuous operation in space-constrained PCB layouts without forced cooling. |
| Zener Impedance | 49 Ω at 1 kHz - maintains tight regulation under small-signal AC variations in feedback loops. |
| Reverse Leakage | 0.1 µA at 23 V - minimizes standby current in high-impedance sensing or clamping nodes. |
| Thermal Resistance | 625 °C/W junction-to-ambient - defines derating slope (see Fig. 1) for reliable operation up to +150 °C ambient. |
| Package | SOT363 - 6-pin, 2.1 mm × 1.3 mm footprint with 0.65 mm pin pitch, compatible with automated pick-and-place and reflow. |
Pinout & Package
SOT363 package: 6-terminal surface-mount plastic case with gull-wing leads; dimensions per AP02002 (2.10 × 1.30 × 0.95 mm); moisture sensitivity level 1; RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode of Diode 1 | Input terminal for first Zener element; connects to cathode (C1) to form functional Zener pair. |
| C1 | Cathode of Diode 1 | Reference node for Diode 1; reverse-biased to achieve 30 V breakdown. |
| A2 | Anode of Diode 2 | Independent anode for second Zener; electrically isolated from A1/C1 and A3/C2. |
| C2 | Cathode of Diode 2 | Second reference node; enables dual-rail or redundant voltage clamping. |
| A3 | Anode of Diode 3 | Third isolated anode; allows triple-voltage monitoring or multi-path protection. |
| C3 | Cathode of Diode 3 | Third Zener cathode; supports independent biasing without shared current paths. |
Key Features
| Feature | Design Value |
|---|---|
| Triple isolated Zeners | Three independent 30 V Zener elements in one SOT363 - reduces board area by ~60% vs. discrete SOD-323 equivalents. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics - supports extended temperature and reliability requirements. |
| Lead-free & green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - complies with strict environmental mandates without performance trade-offs. |
| Low-profile SMT package | 0.95 mm max height - enables use in ultra-thin consumer and portable designs where vertical clearance is constrained. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on 5 V and 3.3 V sensor supply rails in harsh under-hood environments. IC Role / Device Role / Timing Role: Zener diode array provides bidirectional overvoltage protection and stable reference for ADC input scaling. Use Value: Triple isolation prevents fault propagation between sensor channels; AEC-Q101 rating ensures 15-year field reliability at 125 °C ambient. |
Use Scenario: Precision reference generation for 16-bit analog front-ends measuring strain, pressure, or temperature. IC Role / Device Role / Timing Role: Provides low-drift, low-noise 30 V reference for DAC output buffering and op-amp biasing. Use Value: 49 Ω impedance and 0.1 µA leakage maintain <0.01% reference error across industrial temperature range. |
| USB-C Power Delivery Monitor | Medical Infusion Pump Power Supervision |
Use Scenario: Overvoltage detection on VBUS lines during dynamic PD negotiation up to 20 V. IC Role / Device Role / Timing Role: Clamps transient spikes above 30 V while allowing normal 5–20 V operation via series resistor. Use Value: SOT363 footprint fits tight layout constraints near USB-C connectors; 200 mW rating handles repetitive 100 ns surges. |
Use Scenario: Redundant voltage supervision for microcontroller reset circuitry in battery-powered infusion systems. IC Role / Device Role / Timing Role: Three independent Zeners monitor main, backup, and reference rails to trigger fail-safe shutdown. Use Value: Isolation prevents single-point failure; 0.006 g weight supports lightweight portable design goals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSZ5256B3T5G | Same 30 V nominal Zener voltage but rated for 150 mW per diode and 70 Ω impedance at 1 kHz. | Limited to lower-power signal-level clamping; not qualified to AEC-Q101. | Select when cost is prioritized over automotive qualification and thermal margin. |
| BZX84-C30LT1G | Single 30 V Zener in SOT-23; no triple-array configuration; 50 Ω impedance, 200 mW rating. | Requires three separate placements and routing; increases BOM count and assembly time. | Choose only if board layout permits discrete placement and triple-device sourcing is acceptable. |
Compared with NSZ5256B3T5G and BZX84-C30LT1G, MMBZ5256BTS-7-F uniquely delivers triple isolation, AEC-Q101 compliance, and superior thermal performance in minimal area - making it optimal for space- and reliability-critical embedded systems.
Availability
MMBZ5256BTS-7-F is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor modules, USB-C power delivery systems, and medical infusion pump development requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5256BTS-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.
This part belongs to the MMBZ52xxBTS series of triple Zener arrays designed specifically for high-reliability, space-constrained voltage reference and protection in automotive and industrial applications.
FAQ
What is the maximum reverse voltage that can be continuously applied to MMBZ5256BTS-7-F without breakdown?
The absolute maximum reverse voltage before breakdown is defined by its Zener voltage specification: 30 V nominal, with a guaranteed range of 28.5 V to 31.5 V at 4.2 mA test current. Applying more than 31.5 V continuously will cause conduction and must be limited by series resistance to stay within the 200 mW power limit per diode.
Can MMBZ5256BTS-7-F be used in forward-bias mode like a standard diode?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, matching typical silicon diode behavior. However, it is optimized for reverse-bias Zener operation; forward conduction is secondary and not characterized for high-current or switching applications.
How does the SOT363 package affect thermal performance compared to SOT-23?
SOT363 has higher thermal resistance (625 °C/W) than single-die SOT-23 packages (~300–400 °C/W) due to three die sharing one thermal path and smaller copper pad area. Derating is required above +70 °C ambient, per Figure 1 in DS30184 Rev. 13-2.
Is MMBZ5256BTS-7-F suitable for use in medical devices certified to IEC 60601-1?
While not explicitly certified to IEC 60601-1, its AEC-Q101 qualification, halogen-free construction, and 150 °C max operating temperature meet foundational safety and reliability prerequisites. Final system-level certification requires validation within the end-equipment's isolation, creepage, and fault-tree analysis.
MMBZ5256BTS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Configuration:
- 3 Independent
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 49 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 23 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-363
MMBZ5256BTS-7-F FAQ
1.How can I place an order for MMBZ5256BTS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5256BTS-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 MMBZ5256BTS-7-F reliable?
The price and inventory of MMBZ5256BTS-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 MMBZ5256BTS-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5256BTS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5256BTS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5256BTS-7-F?
MMBZ5256BTS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5256BTS-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 MMBZ5256BTS-7-F?
For technical support, including MMBZ5256BTS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5256BTS-7-F requirements.
6.How does Aetrix verify that MMBZ5256BTS-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5256BTS-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 MMBZ5256BTS-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5256BTS-7-F?
All MMBZ5256BTS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5256BTS-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 MMBZ5256BTS-7-F part is unused and in its original packaging.
Return procedure for MMBZ5256BTS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5256BTS-7-F Tags
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Diodes Incorporated
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