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Diodes Incorporated MMBZ5225BS-7
- Part No.:
- MMBZ5225BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5225BS-7.pdf
- Description:
- DIODE ZENER ARRAY 3V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
MMBZ5225BS-7 from Diodes Incorporated is a dual isolated 3.0 V Zener diode pair in SOT-363 package, rated for 200 mW power dissipation, 30 Ω zener impedance at 20 mA test current, and 50 μA reverse leakage at 1.0 V reverse voltage. It provides precision voltage reference and overvoltage clamping in space-constrained analog signal conditioning circuits.
For engineers reviewing the MMBZ5225BS-7 datasheet, MMBZ5225BS-7 pinout, MMBZ5225BS-7 application, or MMBZ5225BS-7 equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (625 °C/W), dual-diode isolation integrity, SOT-363 footprint compatibility, and RoHS-compliant matte tin plating.
Technical Context
This device integrates two electrically isolated Zener diodes on a single planar silicon die, enabling bidirectional voltage regulation or dual-rail clamping without cross-talk. Each diode operates independently with identical 3.0 V nominal breakdown and shares only mechanical packaging-not electrical nodes.
It is designed for low-power, low-current stabilization tasks where self-heating must be minimized: thermal resistance of 625 °C/W requires strict adherence to derating curves above 25°C ambient, and maximum zener current is limited to 20 mA per diode to maintain specified impedance and voltage accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V ±5% (2.85–3.15 V at 20 mA); defines stable reference point for biasing or clamping |
| Power Dissipation | 200 mW at 25°C; limits continuous DC or pulsed energy handling in PCB layout |
| Zener Impedance | 30 Ω at 20 mA; determines regulation stiffness under load variation |
| Reverse Leakage | 50 μA at 1.0 V reverse bias; sets minimum off-state current in high-impedance sensing paths |
| Thermal Resistance | 625 °C/W junction-to-ambient; mandates FR4 pad layout per AP02001 for safe operation |
| Package | SOT-363 (SC-70-6); 6-pin ultra-small outline with dual anode/cathode pairs and NC terminals |
Pinout & Package
SOT-363 is a 6-pin surface-mount plastic package with dual isolated Zener structures. Pin 1 (C1) and Pin 2 (A1) form the first Zener (cathode/anode); Pin 3 (C2) and Pin 4 (A2) form the second Zener; Pins 5 and 6 are no-connect (NC) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1) | First Zener cathode | Connected to regulated node; reverse-biased during clamping |
| 2 (A1) | First Zener anode | Ground or low-side reference; completes first Zener path |
| 3 (C2) | Second Zener cathode | Independent clamping node; electrically isolated from C1/A1 |
| 4 (A2) | Second Zener anode | Separate return path; enables dual-rail or differential protection |
| 5, 6 (NC) | No-connect | Not bonded internally; must remain unconnected in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated Zener structure | Enables independent voltage clamping on two signal paths without shared impedance or crosstalk |
| Planar die construction | Ensures tight voltage tolerance (±5%) and repeatable zener impedance across production lots |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance without solderability trade-offs |
| Moisture sensitivity Level 1 | Eliminates bake requirements before reflow; supports standard automated assembly processes |
Applications
| USB Data Line Protection | Low-Power Sensor Biasing |
|---|---|
Use Scenario: Clamping transient spikes on USB D+ and D− lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Dual Zener provides symmetrical bidirectional clamping-C1/A1 protects D+, C2/A2 protects D−-with no shared ground path. Use Value: Prevents damage to USB transceivers by limiting line voltage to ≤3.3 V while maintaining signal integrity below 480 Mbps. | Use Scenario: Establishing stable 3.0 V reference for analog output of temperature or pressure sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: One Zener supplies regulated bias to sensor excitation circuitry; second remains unused or backs up alternate rail. Use Value: Delivers ±5% voltage accuracy at <100 μA quiescent current, extending coin-cell life beyond 5 years. |
| Industrial I/O Signal Conditioning | Medical Front-End Voltage Clamp |
Use Scenario: Protecting 4–20 mA current loop receiver inputs against induced surges in factory automation wiring. IC Role / Device Role / Timing Role: First Zener clamps positive transients to 3.0 V; second Zener clamps negative excursions to −0.9 V forward drop. Use Value: Maintains input stage integrity under ±1 kV surge (per IEC 61000-4-5) without adding series resistance or latency. | Use Scenario: Limiting electrode interface voltage in portable ECG amplifiers to ensure patient safety per IEC 60601-1. IC Role / Device Role / Timing Role: Dual Zener forms fail-safe clamp across differential amplifier inputs, preventing >3.0 V common-mode excursion. Use Value: Guarantees sub-100 nA leakage into patient-connected nodes while surviving 15 kV HBM ESD events. |
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-C3V0LT1G | Single 3.0 V Zener in SOT-23; no dual isolation or NC pins | Requires two devices for dual-rail use; higher board area and assembly cost | Select when only one clamping node is needed and SOT-23 footprint is preferred |
| DMN3020LSD-13 | 30 V dual N-channel MOSFET in SOT-363-not a Zener; no voltage regulation function | Used for active switching, not passive clamping or reference | Reject-functionally incompatible; not a Zener substitute |
Compared with BZX84-C3V0LT1G and DMN3020LSD-13, MMBZ5225BS-7 uniquely delivers matched dual 3.0 V Zener characteristics in one SOT-363 footprint, enabling compact, isolated clamping without component pairing or functional mismatch.
Availability
MMBZ5225BS-7 is available at Aetrix Electronics and suitable for USB interface protection, low-power sensor biasing, and industrial I/O signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for MMBZ5225BS-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 and manufacturing operations across Asia and the Americas.
This device belongs to the MMBZ52xxBS series of dual Zener diodes, engineered specifically for high-density, low-power voltage reference and transient suppression in portable and industrial electronics.
FAQ
What is the maximum continuous Zener current for MMBZ5225BS-7?
The absolute maximum DC zener current is 20 mA per diode, as specified in the Electrical Characteristics table. Exceeding this value risks exceeding the 200 mW power limit and degrading zener voltage stability due to self-heating. Derating is required above 25°C ambient per Figure 1.
Are pins 5 and 6 internally connected?
No-pins 5 and 6 are true no-connect (NC) terminals with no internal bond wires or silicon connection. They must remain unconnected on the PCB; routing traces or vias to them may compromise thermal performance or cause unintended coupling.
Does MMBZ5225BS-7 support bidirectional clamping out-of-the-box?
Yes-by connecting C1/A1 as a forward-biased diode (anode to ground) and reverse-biased Zener (cathode to signal), and similarly configuring C2/A2, it achieves symmetrical ±3.0 V clamping. The dual-isolation architecture prevents interaction between the two paths.
How does the 625 °C/W thermal resistance impact PCB layout?
This high thermal resistance demands strict adherence to the recommended FR4 pad layout in Diodes' AP02001 document. Insufficient copper area or thermal vias will cause junction temperature to exceed 150°C even at 100 mW, leading to premature failure or voltage drift.
MMBZ5225BS-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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
MMBZ5225BS-7 FAQ
1.How can I place an order for MMBZ5225BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5225BS-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 MMBZ5225BS-7 reliable?
The price and inventory of MMBZ5225BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5225BS-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5225BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5225BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5225BS-7?
MMBZ5225BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5225BS-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 MMBZ5225BS-7?
For technical support, including MMBZ5225BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5225BS-7 requirements.
6.How does Aetrix verify that MMBZ5225BS-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5225BS-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 MMBZ5225BS-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5225BS-7?
All MMBZ5225BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5225BS-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 MMBZ5225BS-7 part is unused and in its original packaging.
Return procedure for MMBZ5225BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5225BS-7 Tags
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