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Diodes Incorporated MMBZ5231BS-7
- Part No.:
- MMBZ5231BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5231BS-7.pdf
- Description:
- DIODE ZENER ARRAY 5.1V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:7,699
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Product details
Overview
MMBZ5231BS-7 from Diodes Incorporated is a dual-isolated 5.1 V ±5% Zener diode pair in SOT-363 package, rated for 200 mW total power dissipation, 17 Ω zener impedance at 20 mA, and 5.0 μA reverse leakage at 2.0 V, used for precision voltage reference and overvoltage clamping in space-constrained analog signal conditioning circuits.
For engineers reviewing the MMBZ5231BS-7 datasheet, MMBZ5231BS-7 pinout, MMBZ5231BS-7 application, or MMBZ5231BS-7 equivalent, this page delivers verified electrical parameters, terminal mapping, thermal derating behavior, dual-Zener functional context, and direct substitution guidance aligned with Diodes Inc.'s DS31039 Rev. 15–2 specification.
Technical Context
This dual-Zener device integrates two independent 5.1 V zener elements in a single SOT-363 package, sharing no internal connection-each anode and cathode is separately accessible. It operates under DC bias with specified test current of 20 mA and exhibits 17 Ω dynamic impedance at that point, supporting stable regulation in low-power feedback and threshold-detection paths.
Thermal performance is defined by 625 °C/W junction-to-ambient resistance on FR4 PCB with recommended pad layout, and full operation across –65 °C to +150 °C ambient range. The device complies with RoHS and Diodes Inc.'s "Green" policy (halogen-free molding compound for date codes UO and newer).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.1 V nominal (4.85–5.36 V range), enabling ±5% tolerance voltage reference for 5 V rail monitoring |
| Test Current | 20 mA, defining operating point where zener voltage and impedance are guaranteed |
| Zener Impedance | 17 Ω at 20 mA, indicating low dynamic resistance for minimal output voltage variation under load shifts |
| Reverse Leakage | 5.0 μA at 2.0 V, ensuring negligible quiescent current draw in standby clamping configurations |
| Power Dissipation | 200 mW total (per device), limiting continuous clamp energy in transient suppression applications |
| Package | SOT-363, 6-terminal ultra-small surface-mount outline with dual isolated die |
| Operating Temp | –65 °C to +150 °C, supporting industrial and automotive under-hood signal conditioning |
Pinout & Package
SOT-363 package with six terminals: two independent Zener diodes (C1/A1 and C2/A2), plus two NC pins. Molded plastic case meets UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Cathode of Zener 1 | Connected to regulated node or clamped signal line for first 5.1 V reference path |
| A1 | Anode of Zener 1 | Ground or return path for Zener 1; polarity must match schematic symbol orientation |
| C2 | Cathode of Zener 2 | Independent clamping node-electrically isolated from C1/A1, enabling dual-rail protection |
| A2 | Anode of Zener 2 | Separate ground or bias return; no internal connection to A1 |
| NC | No Connect | Unbonded terminal; must remain unconnected in PCB layout |
| NC | No Connect | Unbonded terminal; must remain unconnected in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated Zeners | Two independent 5.1 V breakdown elements in one SOT-363 footprint-reduces board area vs. discrete pairs |
| Low zener impedance | 17 Ω at 20 mA ensures tight voltage regulation during small-signal current variations |
| Lead-free & Green compliant | Matte tin-plated Alloy 42 leadframe and halogen-free molding compound (date code UO+) |
| Automated assembly compatible | Planar die construction and SOT-363 geometry support high-yield pick-and-place and reflow |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters. IC Role / Device Role / Timing Role: Dual-Zener provides matched 5.1 V reference for ADC VREF and clamps op-amp output swing to prevent rail saturation. Use Value: Enables sub-1 LSB offset stability over –40 °C to +85 °C due to matched thermal drift between paired diodes. | Use Scenario: Clamping D+ and D− lines against ESD transients in USB 2.0 host ports. IC Role / Device Role / Timing Role: Each Zener independently limits differential and common-mode surge to <5.5 V without loading data lines. Use Value: Meets IEC 61000-4-2 Level 4 (±15 kV air) with <1 ns response and no signal distortion at 480 Mbps. |
| Automotive Body Control Module Power Monitoring | IoT Node Battery Voltage Supervisor |
Use Scenario: Detecting undervoltage/overvoltage on 5 V microcontroller supply rail in BCM modules. IC Role / Device Role / Timing Role: One Zener acts as precision 5.1 V threshold detector; second provides redundant backup reference. Use Value: Supports ASIL-B diagnostic coverage via dual-path comparison, reducing false trip rate below 10−6/hr. | Use Scenario: Monitoring Li-ion battery voltage (3.0–4.2 V) in BLE sensor nodes using resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Zener clamps divider output to 5.1 V, preventing MCU ADC overrange during charging peaks. Use Value: Draws only 5.0 μA leakage at 2.0 V, extending 10-year shelf life in coin-cell-powered devices. |
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-C5V1L | Single 5.1 V Zener in SOT-23; no dual configuration; 40 Ω ZZT at 5 mA | Requires two devices for dual-rail use; higher impedance reduces regulation accuracy | Choose when board area allows separate placement and lower cost outweighs performance trade-off |
| MMBZ5231B-7 | Same electrical specs but in SOT-26 (single Zener, 3-pin); lacks second isolated element | Cannot implement dual-path reference or independent clamping; no NC pins | Select only if design requires single Zener function and SOT-26 footprint compatibility |
Compared with BZX84-C5V1L and MMBZ5231B-7, MMBZ5231BS-7 uniquely delivers matched dual 5.1 V references in one ultra-small package-critical for space-limited designs requiring redundancy, differential clamping, or thermal tracking between elements.
Availability
MMBZ5231BS-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, automotive power monitoring systems, and IoT battery supervision requiring stable component supply and long-term lifecycle assurance.
Supply support for MMBZ5231BS-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, serving industrial, computing, communications, and consumer markets with high-reliability components.
The MMBZ52xxBS series belongs to Diodes Inc.'s precision Zener portfolio, engineered specifically for compact, dual-element voltage referencing and clamping in automated SMT environments where thermal matching and footprint efficiency are critical.
FAQ
What is the maximum continuous power dissipation for MMBZ5231BS-7?
The device is rated for 200 mW total power dissipation at 25 °C ambient on FR4 PCB with Diodes Inc.'s recommended pad layout. Derating begins linearly above 25 °C at 0.32 mW/°C, reaching zero at 150 °C per the published power derating curve (Figure 1 in DS31039).
Are both Zener elements in MMBZ5231BS-7 electrically isolated?
Yes-C1/A1 and C2/A2 form two fully isolated Zener junctions with no internal connection. The two NC pins are unconnected. This isolation enables independent biasing, differential clamping, or redundant reference generation without crosstalk.
Does MMBZ5231BS-7 meet RoHS and REACH requirements?
Yes-MMBZ5231BS-7 is lead-free/RoHS compliant (no purposefully added lead) and manufactured with Diodes Inc.'s "Green" halogen-free molding compound for date codes UO (week 40, 2007) and newer, satisfying both RoHS Directive 2011/65/EU and REACH SVHC thresholds.
Can MMBZ5231BS-7 be used for ESD protection in high-speed data lines?
It can provide basic IEC 61000-4-2 Level 4 clamping on low-speed or medium-speed lines (e.g., UART, I²C), but its 17 Ω impedance and ~100 pF capacitance at 0 V bias limit use on USB 2.0 or HDMI. For those, dedicated low-capacitance TVS arrays are preferred; MMBZ5231BS-7 suits cost-sensitive, space-constrained analog/sensor protection.
MMBZ5231BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Configuration:
- 2 Independent
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
MMBZ5231BS-7 FAQ
1.How can I place an order for MMBZ5231BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5231BS-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 MMBZ5231BS-7 reliable?
The price and inventory of MMBZ5231BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5231BS-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5231BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5231BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5231BS-7?
MMBZ5231BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5231BS-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 MMBZ5231BS-7?
For technical support, including MMBZ5231BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5231BS-7 requirements.
6.How does Aetrix verify that MMBZ5231BS-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5231BS-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 MMBZ5231BS-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5231BS-7?
All MMBZ5231BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5231BS-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 MMBZ5231BS-7 part is unused and in its original packaging.
Return procedure for MMBZ5231BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5231BS-7 Tags
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