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Diodes Incorporated MMBZ5229BS-7
- Part No.:
- MMBZ5229BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5229BS-7.pdf
- Description:
- DIODE ZENER ARRAY 4.3V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:5,838
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Product details
Overview
MMBZ5229BS-7 from Diodes Incorporated is a dual-isolated 4.3 V, 200 mW surface-mount Zener diode in SOT-363 package, rated for 20 mA test current with 22 Ω dynamic impedance at 1 kHz and 5.0 μA reverse leakage at 1.0 V, used for precision voltage reference and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the MMBZ5229BS-7 datasheet, MMBZ5229BS-7 pinout, MMBZ5229BS-7 application, or MMBZ5229BS-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (625 °C/W), dual-diode isolation integrity, RoHS-compliant matte tin plating, and SOT-363 footprint compatibility with automated PCB assembly.
Technical Context
This dual-Zener device integrates two electrically isolated 4.3 V Zener junctions in a single SOT-363 package, enabling independent voltage clamping or reference functions on separate signal paths without cross-coupling. Each diode exhibits tightly controlled 4.09–4.52 V breakdown range at 20 mA and maintains stable regulation down to 0.25 mA knee current.
Its planar die construction ensures repeatable Zener characteristics across temperature (−65 to +150 °C), while the 625 °C/W junction-to-ambient thermal resistance requires careful PCB copper area allocation per Diodes Inc.'s AP02001 layout guidelines to sustain full 200 mW dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V nominal, 4.09–4.52 V min/max at 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - maximum continuous power before thermal derating begins |
| Zener Impedance (ZZT) | 22 Ω at IZT = 20 mA, f = 1 kHz - indicates regulation stiffness against load current variation |
| Reverse Leakage (IR) | 5.0 μA at VR = 1.0 V - quantifies off-state conduction loss in clamping applications |
| Thermal Resistance (RθJA) | 625 °C/W - determines required PCB copper area to limit junction temperature rise |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood environments without derating |
Pinout & Package
SOT-363 (SC-88) plastic surface-mount package with six terminals: two anodes (A1, A2), two cathodes (C1, C2), and two no-connect (NC) pins. Molded UL 94V-0 plastic case weighs 0.006 g and supports lead-free reflow soldering per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Cathode of Zener 1 | Connected to regulated node; reverse-biased during clamping or reference operation |
| A1 | Anode of Zener 1 | Reference ground or return path for first Zener element |
| C2 | Cathode of Zener 2 | Independent regulated node; electrically isolated from C1/A1 pair |
| A2 | Anode of Zener 2 | Separate return path enabling dual-rail or differential reference use |
| NC | No Connect | Unbonded internal terminal; must remain unconnected on PCB |
| NC | No Connect | Unbonded internal terminal; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated Zener elements | Enables independent voltage regulation or clamping on two signal paths without shared thermal or electrical coupling |
| Planar die construction | Delivers tight ±5% Zener voltage tolerance and stable long-term parameter drift under thermal cycling |
| Lead-free / RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets global environmental compliance without solderability compromise |
| Ultra-small SOT-363 footprint | Reduces board space by >40% versus SOIC-8 dual Zeners while maintaining full 200 mW per element rating |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing bias voltage for 4–20 mA transmitter front-end op-amps in harsh factory environments. IC Role / Device Role / Timing Role: Dual Zener provides independent 4.3 V references for excitation and feedback paths. Use Value: Eliminates need for two discrete SOT-23 Zeners, reducing BOM count and layout area while ensuring matched thermal drift. |
Use Scenario: Clamping transient surges on USB D+ and D− lines during hot-plug events. IC Role / Device Role / Timing Role: Each Zener clamps its respective data line to 4.3 V relative to GND. Use Value: Prevents ESD damage to USB transceivers with <5.0 μA leakage at 1.0 V, minimizing standby current impact. |
| Automotive Body Control Module | Medical Wearable Battery Monitoring |
|
Use Scenario: Regulating supply to microcontroller I/O buffers exposed to 12 V battery transients. IC Role / Device Role / Timing Role: One Zener regulates 4.3 V rail; second serves as overvoltage detector via comparator input. Use Value: Dual functionality in one package improves system-level fault coverage without adding component count. |
Use Scenario: Providing stable reference for ADC measurement of lithium-ion cell voltage in compact patches. IC Role / Device Role / Timing Role: Zener establishes precise 4.3 V reference for ratiometric ADC conversion. Use Value: 22 Ω impedance ensures <1 LSB error contribution across 0–20 mA sensor current range. |
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-C4V3LT1G | Single 4.3 V Zener in SOT-23; no dual isolation; 30 Ω ZZT; 100 nA IR at 1 V | Requires two devices for dual-path use; lower leakage but higher impedance degrades regulation accuracy | Select when only one reference rail is needed and ultra-low leakage dominates design priority |
| MMBZ5229B-7-F | Same electrical specs but in SOT-23 package; single Zener; no dual-element capability | Cannot support independent dual-rail clamping or referencing; occupies larger PCB area than SOT-363 | Choose only if legacy SOT-23 footprint compatibility is mandatory and dual functionality is unnecessary |
Compared with BZX84-C4V3LT1G and MMBZ5229B-7-F, the MMBZ5229BS-7 uniquely delivers two thermally coupled yet electrically isolated 4.3 V Zeners in the smallest possible footprint-critical for space-constrained dual-reference or differential clamping designs where matched characteristics matter.
Availability
MMBZ5229BS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and automotive body control modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for MMBZ5229BS-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.
The MMBZ52xxBS series targets high-density, low-power voltage regulation and protection in portable and automotive electronics, emphasizing miniaturization, thermal stability, and RoHS compliance without sacrificing Zener parameter consistency.
FAQ
What is the maximum continuous power dissipation for MMBZ5229BS-7 at 70°C ambient?
At 70°C ambient, the device's power dissipation must be derated linearly from 200 mW at 25°C using the 625 °C/W thermal resistance. The allowable power is 200 mW × (1 − (70 − 25)/625) = 140 mW. This assumes adherence to Diodes Inc.'s recommended FR4 pad layout per AP02001.
Are both Zener elements in MMBZ5229BS-7 electrically isolated from each other?
Yes - the SOT-363 package contains two fully isolated PN junctions with separate anode and cathode terminals (A1/C1 and A2/C2). No internal connection exists between the two Zener structures, enabling independent biasing and true dual-channel operation.
Does MMBZ5229BS-7 meet JEDEC moisture sensitivity level requirements?
Yes - it is rated Moisture Sensitivity Level 1 per J-STD-020D, meaning it may be stored indefinitely at ≤30°C/85% RH without baking prior to reflow. This eliminates pre-assembly moisture mitigation steps in standard SMT processes.
Can MMBZ5229BS-7 be used for bidirectional ESD protection?
No - it is a unidirectional Zener diode configured for reverse-bias clamping only. For bidirectional ESD protection, a dedicated TVS array like the D3V3Z5U2SOT-7 is required; this part lacks symmetrical breakdown in forward conduction mode.
MMBZ5229BS-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):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
MMBZ5229BS-7 FAQ
1.How can I place an order for MMBZ5229BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5229BS-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 MMBZ5229BS-7 reliable?
The price and inventory of MMBZ5229BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5229BS-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5229BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5229BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5229BS-7?
MMBZ5229BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5229BS-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 MMBZ5229BS-7?
For technical support, including MMBZ5229BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5229BS-7 requirements.
6.How does Aetrix verify that MMBZ5229BS-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5229BS-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 MMBZ5229BS-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5229BS-7?
All MMBZ5229BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5229BS-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 MMBZ5229BS-7 part is unused and in its original packaging.
Return procedure for MMBZ5229BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5229BS-7 Tags
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