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Diodes Incorporated MMBZ5239BS-7-F
- Part No.:
- MMBZ5239BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5239BS-7-F.pdf
- Description:
- DIODE ZENER ARRAY 9.1V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
MMBZ5239BS-7-F from Diodes Incorporated is a dual isolated 9.1 V, 200 mW surface-mount Zener diode in SOT-363 package, with nominal zener voltage 9.1 V (min 8.65 V, max 9.56 V), test current 20 mA, and zener impedance 10 Ω at 20 mA. It provides precision voltage regulation and overvoltage protection in compact power management circuits for portable electronics and sensor signal conditioning.
For engineers reviewing the MMBZ5239BS-7-F datasheet, MMBZ5239BS-7-F pinout, MMBZ5239BS-7-F application, or MMBZ5239BS-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at rated test current, reverse leakage at 7.0 V, thermal resistance (625 °C/W), and dual-diode isolation in ultra-small SOT-363.
Technical Context
This dual-Zener device integrates two electrically isolated 9.1 V zener junctions in a single SOT-363 package, enabling independent voltage reference or clamping paths without cross-coupling. Each diode operates with 20 mA test current, 10 Ω dynamic impedance at 20 mA, and ≤3.0 μA reverse leakage at VR = 7.0 V.
Its planar die construction ensures stable breakdown characteristics across -65 °C to +150 °C operating range, and its 200 mW power rating is derated linearly above 25 °C ambient per the published curve (625 °C/W RθJA on FR4 board).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.65–9.56 V range at 20 mA - defines regulated output voltage tolerance under standard bias |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - sets maximum continuous DC power handling before thermal derating applies |
| Zener Impedance (ZZT) | 10 Ω at IZT = 20 mA - determines AC regulation stiffness and ripple rejection capability |
| Reverse Leakage (IR) | ≤3.0 μA at VR = 7.0 V - ensures low standby current in clamp/reference configurations |
| Thermal Resistance (RθJA) | 625 °C/W on FR4 board - quantifies junction-to-ambient temperature rise per watt dissipated |
| Operating Temperature | -65 °C to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOT-363 (SC-70-6), molded plastic case with UL 94V-0 flammability rating, moisture sensitivity level 1, and matte tin-plated Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Anode of Zener 1 | Forward-biased terminal for Zener 1; connects to cathode of external series resistor in shunt regulator |
| A1 | Cathode of Zener 1 | Regulated output node for Zener 1; voltage referenced to C1 when reverse-biased |
| C2 | Anode of Zener 2 | Independent anode for second isolated zener path; enables dual-rail or redundancy schemes |
| A2 | Cathode of Zener 2 | Second regulated output node; fully isolated from Zener 1's terminals |
| NC | No Connect | Internally unconnected pin; must remain floating per datasheet |
| NC | No Connect | Second internally unconnected pin; no PCB trace or solder connection required |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated zener junctions | Enables independent voltage references or redundant clamping in one footprint, reducing board area vs. discrete dual diodes |
| 200 mW power rating | Supports stable regulation in low-power sensor interfaces and microcontroller I/O protection without heatsinking |
| SOT-363 package | 0.006 g weight and 2.2 × 1.35 mm footprint allow high-density placement in space-constrained portable designs |
| Lead-free/RoHS-compliant | Meets global environmental compliance requirements without sacrificing electrical performance or reliability |
Applications
| Portable Power Monitoring | Microcontroller I/O Protection |
|---|---|
Use Scenario: Monitoring battery voltage in Bluetooth earbuds using a 3.3 V ADC input with internal 1.2 V reference. IC Role / Device Role: Zener 1 acts as precision 9.1 V reference divider leg; Zener 2 unused or reserved for future calibration path. Use Value: Tight 5% VZ tolerance and 10 Ω ZZT ensure <±10 mV reference drift over temperature and load. | Use Scenario: Clamping ESD transients on UART TX/RX lines in a wearable health sensor node. IC Role / Device Role: Dual zeners provide bidirectional clamping: Zener 1 (A1–C1) for positive surge, Zener 2 (A2–C2) for negative surge. Use Value: Isolation between clamping paths prevents coupling noise into adjacent signal lines during multi-event ESD events. |
| Industrial Sensor Signal Conditioning | Low-Power Reference Buffering |
Use Scenario: Stabilizing excitation voltage for a 4–20 mA pressure transmitter powered from 24 V loop supply. IC Role / Device Role: Zener 1 regulates 9.1 V for op-amp bias; Zener 2 provides backup reference if primary fails. Use Value: Dual isolation allows fault containment-failure of one zener does not compromise the other's regulation path. | Use Scenario: Providing stable 9.1 V reference to a low-noise LDO that supplies analog front-end circuitry. IC Role / Device Role: Zener 1 establishes reference; Zener 2 buffers reference via emitter-follower to reduce source impedance. Use Value: 10 Ω ZZT and 625 °C/W RθJA enable <0.5 mV/V line regulation and <20 ppm/°C thermal drift in buffered configuration. |
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-C9V1LT1G | Single 9.1 V Zener in SOT-23; no dual isolation; 15 Ω ZZT at 5 mA | Requires two devices for dual-path use; higher dynamic impedance reduces regulation accuracy | Select when only one reference path is needed and board space permits separate placement |
| MMBZ5239B-7-F | Same electrical specs but in SOT-26 (6-pin) instead of SOT-363; identical marking KF4 | Same function but larger footprint (2.9 × 1.3 mm vs. 2.2 × 1.35 mm); different pad layout | Select when legacy SOT-26 assembly lines are in use or thermal margin requires larger package |
Compared with BZX84-C9V1LT1G and MMBZ5239B-7-F, MMBZ5239BS-7-F uniquely delivers dual isolated 9.1 V regulation in the smallest footprint (SOT-363), enabling space-constrained dual-rail designs without performance trade-offs in zener impedance or leakage.
Availability
MMBZ5239BS-7-F is available at Aetrix Electronics and suitable for portable power monitoring, microcontroller I/O protection, and industrial sensor signal conditioning requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMBZ5239BS-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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.
This device belongs to the MMBZ52xxBS dual-Zener series designed specifically for space-constrained voltage reference and transient suppression applications where dual isolated junctions in ultra-small packages deliver functional density and design flexibility.
FAQ
What is the maximum reverse voltage this device can withstand before breakdown?
The nominal zener voltage is 9.1 V with a guaranteed range of 8.65 V to 9.56 V at 20 mA test current. Breakdown occurs within this range under specified conditions; operation above 9.56 V at 20 mA exceeds the maximum rated specification and may cause parametric shift or failure.
Can both zener diodes be used simultaneously in the same circuit?
Yes - the two zeners are electrically isolated, allowing simultaneous use for independent functions such as dual-rail referencing, redundant clamping, or split-voltage generation. The NC pins must remain unconnected, and each zener's anode/cathode pair must be biased separately per the top-view schematic.
Is thermal derating required for operation above 25°C ambient?
Yes - the 200 mW power rating applies only at 25 °C ambient. Derating follows a linear slope of 0.32 mW/°C above 25 °C, based on the 625 °C/W thermal resistance. At 85 °C ambient, maximum allowable power drops to 12.8 mW.
Does this part meet JEDEC moisture sensitivity level requirements?
Yes - MMBZ5239BS-7-F is rated at Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30 °C/85 % RH without baking prior to reflow soldering.
MMBZ5239BS-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:
- 2 Independent
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 7 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
MMBZ5239BS-7-F FAQ
1.How can I place an order for MMBZ5239BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5239BS-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 MMBZ5239BS-7-F reliable?
The price and inventory of MMBZ5239BS-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 MMBZ5239BS-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5239BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5239BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5239BS-7-F?
MMBZ5239BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5239BS-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 MMBZ5239BS-7-F?
For technical support, including MMBZ5239BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5239BS-7-F requirements.
6.How does Aetrix verify that MMBZ5239BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5239BS-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 MMBZ5239BS-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5239BS-7-F?
All MMBZ5239BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5239BS-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 MMBZ5239BS-7-F part is unused and in its original packaging.
Return procedure for MMBZ5239BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5239BS-7-F Tags
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