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Diodes Incorporated MMBZ5236B-7
- Part No.:
- MMBZ5236B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5236B-7.pdf
- Description:
- DIODE ZENER 7.5V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:69
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Product details
Overview
MMBZ5236B-7 from Diodes Incorporated is a 7.5V ±4% surface-mount Zener diode in SOT23 package, rated for 350mW power dissipation at 25°C, with 6Ω typical Zener impedance at 20mA test current and 3µA maximum reverse leakage at 6.0V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the MMBZ5236B-7 datasheet, MMBZ5236B-7 pinout, MMBZ5236B-7 application, or MMBZ5236B-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±4%), thermal resistance (357°C/W), JEDEC-compliant reliability, RoHS/Green compliance, and SOT23 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (6Ω @ 20mA) for tight regulation in feedback loops.
Designed for operation on FR-4 PCBs with recommended pad layout, it delivers specified 350mW dissipation only when mounted per JEDEC-standard thermal guidelines. The device exhibits 3µA max reverse leakage at VR = 6.0V and maintains stable VZ across -65°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 7.5V - precise reference voltage for analog sensing or regulator feedback |
| Zener Voltage Range | 7.13V to 7.88V - ±4% tolerance ensures predictable clamping level |
| Test Current (IZT) | 20mA - standard bias point for guaranteed VZ and ZZT specification |
| Zener Impedance (ZZT) | 6Ω @ 20mA - low dynamic resistance enables stable regulation under load transients |
| Power Dissipation | 350mW @ TA = 25°C - defines maximum continuous DC power on FR-4 board |
| Reverse Leakage (IR) | 3.0µA @ VR = 6.0V - minimal off-state current preserves low-power system integrity |
| Thermal Resistance (RθJA) | 357°C/W - quantifies junction-to-ambient heat transfer limitation on standard PCB |
Pinout & Package
Package: SOT23 - 3-pin surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher potential side; defines regulated output node in shunt regulator |
| No Connection (Pin 3) | Internal die attach flag | Electrically isolated; serves mechanical anchoring function only |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling |
| 350mW power rating on FR-4 | Enables use in space-constrained consumer and industrial PCBs without heatsinking |
| Lead-free & RoHS 3 compliant | Meets global environmental regulations including EU Directive 2015/863/EU |
| Halogen- and antimony-free "Green" compound | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - supports eco-friendly manufacturing |
| JEDEC High Reliability qualification | Validated per AEC-Q standards for extended lifetime in non-automotive high-reliability systems |
Applications
| USB Port Overvoltage Protection | Microcontroller I/O Clamp Circuit |
|---|---|
|
Use Scenario: Protecting USB data lines from ESD-induced voltage spikes exceeding 5.5V. IC Role / Device Role / Timing Role: Shunt clamp element that conducts above 7.5V to divert transient energy to ground. Use Value: Prevents damage to 3.3V/5V USB PHY ICs by limiting line voltage to ≤7.88V during 8kV HBM events. |
Use Scenario: Safeguarding GPIO pins of ARM Cortex-M microcontrollers against external signal overvoltage. IC Role / Device Role / Timing Role: Bidirectional voltage limiter placed between I/O pin and VDD/GND rails. Use Value: Enables robust interfacing with 5V sensors while maintaining 3.3V logic compatibility and sub-µA leakage. |
| Low-Power Sensor Reference | DC-DC Converter Feedback Divider |
|
Use Scenario: Providing stable 7.5V reference for analog front-end circuitry in battery-powered gas sensors. IC Role / Device Role / Timing Role: Precision voltage source for ADC reference or op-amp bias network. Use Value: Delivers ±4% accuracy and 6Ω impedance to minimize reference error under 100µA load variations. |
Use Scenario: Setting output voltage of adjustable buck converter via resistive divider with integrated Zener. IC Role / Device Role / Timing Role: Secondary reference node replacing one resistor in feedback network to improve temperature stability. Use Value: Reduces output drift by compensating for resistor TCR with Zener's negative tempco near 7.5V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5 (Nexperia) | Same 7.5V nominal, but 10Ω Zener impedance @ 5mA; 250mW rating on FR-4 | Higher impedance limits regulation accuracy in precision references; lower power rating restricts continuous use | Select when cost sensitivity outweighs regulation precision and thermal margin requirements |
| 1N4733A (ON Semiconductor) | Dual-anode DO-35 through-hole package; 7.5V ±5%, 10Ω @ 20mA, 1W rating | Through-hole mounting incompatible with SMT production; larger footprint unsuitable for dense layouts | Choose only for prototyping or legacy through-hole designs where rework tolerance is prioritized over size |
Compared with BZX84-C7V5 and 1N4733A, MMBZ5236B-7 offers superior thermal performance (350mW vs. 250mW/1W), tighter voltage tolerance (±4% vs. ±5%), and SMT compatibility-making it optimal for high-density, automated production of regulated power and protection circuits.
Availability
MMBZ5236B-7 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O clamping, and low-power sensor reference applications requiring stable component supply, JEDEC reliability, and RoHS/Green compliance.
Supply support for MMBZ5236B-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, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBZ52xxB series belongs to Diodes' precision Zener diode product line, engineered specifically for surface-mount voltage regulation and overvoltage protection in space-constrained, high-volume consumer and industrial electronics.
FAQ
What is the maximum continuous power dissipation for MMBZ5236B-7 on a standard FR-4 PCB?
The MMBZ5236B-7 is rated for 350mW continuous power dissipation when mounted on FR-4 PCB using Diodes Incorporated's recommended pad layout. This rating assumes ambient temperature of +25°C and drops linearly per the derating curve (357°C/W) above that temperature.
Does MMBZ5236B-7 meet automotive qualification standards?
MMBZ5236B-7 is not AEC-Q200 qualified. For automotive applications, Diodes offers Q-suffix variants (e.g., MMBZ5236BQ-7-F) manufactured in IATF 16949-certified facilities and qualified to AEC-Q200. These carry additional change control and PPAP documentation.
How does the Zener impedance of MMBZ5236B-7 affect voltage regulation accuracy?
With 6Ω typical Zener impedance at 20mA, the MMBZ5236B-7 introduces ≤0.12V deviation for ±20mA load current variation. This low impedance ensures stable regulation in feedback networks and reference circuits where load current changes dynamically.
Can MMBZ5236B-7 be used in bidirectional ESD protection configurations?
No - MMBZ5236B-7 is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, Diodes recommends dedicated TVS arrays like D24Z5.1L or AP7155 series, which provide symmetrical clamping in both polarities.
MMBZ5236B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6 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-23-3
MMBZ5236B-7 FAQ
1.How can I place an order for MMBZ5236B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5236B-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 MMBZ5236B-7 reliable?
The price and inventory of MMBZ5236B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5236B-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5236B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5236B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5236B-7?
MMBZ5236B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5236B-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 MMBZ5236B-7?
For technical support, including MMBZ5236B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5236B-7 requirements.
6.How does Aetrix verify that MMBZ5236B-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5236B-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 MMBZ5236B-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5236B-7?
All MMBZ5236B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5236B-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 MMBZ5236B-7 part is unused and in its original packaging.
Return procedure for MMBZ5236B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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