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Diodes Incorporated MMBZ5251BTS-7-F
- Part No.:
- MMBZ5251BTS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5251BTS-7-F.pdf
- Description:
- DIODE ZENER ARRAY 22V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
MMBZ5251BTS-7-F from Diodes Incorporated is a triple-surface-mount Zener diode array in SOT363 package, providing three isolated 22 V ±5% Zener references with 5.6 mA test current, 29 Ω dynamic impedance at 20 mA, and 0.1 µA reverse leakage at 17 V. It delivers precision voltage clamping for power rail protection in compact DC-DC converter feedback loops.
For engineers reviewing the MMBZ5251BTS-7-F datasheet, MMBZ5251BTS-7-F pinout, MMBZ5251BTS-7-F application, or MMBZ5251BTS-7-F equivalent, key selection criteria include zener voltage tolerance (±5%), low dynamic impedance (29 Ω), ultra-small SOT363 footprint, AEC-Q101 qualification, and triple-diode integration for space-constrained automotive and industrial control boards.
Technical Context
This device integrates three electrically isolated Zener diodes in a single 6-pin SOT363 package, each rated for 200 mW total power dissipation and operating across –65°C to +150°C. Its thermal resistance (625°C/W) and derating curve support stable regulation under ambient temperature variations up to 125°C.
The diodes are characterized at 5.6 mA test current (IZT), with nominal Zener voltage of 22 V (20.9–23.1 V range), 29 Ω impedance at IZT, and 0.1 µA reverse leakage at VR = 17 V - enabling accurate voltage reference and overvoltage clamp functions without external biasing networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 20.9–23.1 V range at 5.6 mA - ensures tight regulation for 24 V system monitoring and fault detection |
| Power Dissipation (PD) | 200 mW - supports continuous operation in low-power sensor interfaces and microcontroller I/O protection |
| Zener Impedance (ZZT) | 29 Ω at 5.6 mA - minimizes output voltage variation under load transients in feedback paths |
| Reverse Leakage (IR) | 0.1 µA at 17 V - enables high-impedance voltage sensing without loading reference nodes |
| Package | SOT363 - 2.1 mm × 1.3 mm footprint with 0.65 mm pin pitch, compatible with fine-pitch automated assembly |
| AEC-Q101 Qualified | Yes - validated for automotive electronics including body control modules and infotainment power supplies |
Pinout & Package
Package: SOT363 - ultra-small plastic surface-mount case with six terminals, UL 94V-0 rated, moisture sensitivity level 1, and matte tin-plated Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | First Zener diode anode - connects to ground or low-side reference node in clamp configuration |
| A2 | Anode 2 | Second Zener diode anode - independent terminal for dual-rail voltage supervision |
| A3 | Anode 3 | Third Zener diode anode - enables triple-threshold detection in safety-critical monitoring circuits |
| C1 | Cathode 1 | First Zener diode cathode - ties to 22 V rail or feedback point requiring precise clamping |
| C2 | Cathode 2 | Second Zener diode cathode - isolated path for redundant voltage reference generation |
| C3 | Cathode 3 | Third Zener diode cathode - supports multi-channel overvoltage protection in motor driver PCBs |
Key Features
| Feature | Design Value |
|---|---|
| Triple isolated Zeners | Three independent 22 V Zener elements in one SOT363 - reduces board area by >60% vs. discrete solutions |
| AEC-Q101 qualification | Validated for automotive under-hood applications - supports 15-year reliability in engine control units |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC J-STD-020D Level 1 - eliminates reflow soldering concerns and environmental compliance risk |
| Low Zener impedance | 29 Ω at 5.6 mA - maintains <±25 mV regulation shift across 1–10 mA load changes in feedback networks |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Monitoring 24 V battery rail for undervoltage/overvoltage faults in BCM power management. IC Role / Device Role / Timing Role: Triple Zener array provides independent thresholds for brown-out detection (20.9 V), nominal regulation (22 V), and overvoltage clamp (23.1 V). Use Value: Eliminates need for three separate SOD-323 diodes and associated routing, reducing BOM count and layout complexity by 70%. | Use Scenario: Protecting 24 V digital input channels from ESD and transient surges in factory automation I/O modules. IC Role / Device Role / Timing Role: Each Zener clamps fast transients on separate input lines while sharing common ground return. Use Value: Achieves <1 ns response time with 0.1 µA leakage - preserves signal integrity without adding RC filtering delay. |
| Medical Infusion Pump Power Supervision | Telecom Remote Radio Unit Biasing |
Use Scenario: Ensuring safe shutdown when main 24 V supply exceeds tolerance during battery-switchover events. IC Role / Device Role / Timing Role: Acts as precision voltage comparator element in discrete window detector circuit with hysteresis. Use Value: ±5% VZ tolerance and 29 Ω ZZT enable reliable trip points within ±0.5 V margin - critical for FDA Class II compliance. | Use Scenario: Stabilizing bias voltage for GaN FET gate drivers in 5G RRH power amplifiers. IC Role / Device Role / Timing Role: Provides low-noise 22 V reference for current-sense amplifier offset calibration. Use Value: 0.1 µA IR at 17 V prevents drift in high-impedance bias networks - maintains <0.1% gain error over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF5.0AT1G | Single 5.0 V Zener in SOD-123, 200 mW rating, 10 Ω impedance | Not triple-isolated; requires three devices and extra PCB area for same function | Select only if single-rail 5 V clamping suffices and board space is not constrained |
| BZX84-C22LT1G | Single 22 V Zener in SOT-23, 350 mW rating, 55 Ω impedance | Lacks integrated triple-diode topology; higher impedance degrades regulation accuracy | Preferable only when higher power handling (>200 mW per diode) is required and isolation between channels is unnecessary |
Compared with SMF5.0AT1G and BZX84-C22LT1G, MMBZ5251BTS-7-F uniquely delivers three matched 22 V Zeners in one AEC-Q101-qualified SOT363 package - enabling compact, thermally coupled, and production-tested voltage supervision where channel correlation and footprint reduction are design priorities.
Availability
MMBZ5251BTS-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, medical infusion pump power supervisors, and telecom remote radio unit biasing requiring stable component supply and long-term lifecycle assurance.
Supply support for MMBZ5251BTS-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.
The MMBZ52xxBTS series belongs to Diodes' precision Zener diode portfolio, engineered specifically for high-reliability voltage reference and transient suppression in automotive and industrial environments where miniaturization and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum reverse voltage (VR) this device can withstand before breakdown?
The MMBZ5251BTS-7-F has a nominal Zener voltage of 22 V with a guaranteed range of 20.9–23.1 V at 5.6 mA test current. Its reverse breakdown is specified at 23.1 V maximum, and it exhibits only 0.1 µA leakage at 17 V - confirming stable operation below nominal VZ. Operation above 23.1 V risks irreversible avalanche conduction unless current-limited.
Can this part replace three individual MMBZ5251BS diodes in a design?
Yes - the MMBZ5251BTS-7-F integrates three electrically isolated 22 V Zener diodes in one SOT363 package, matching the electrical specs of the single-diode MMBZ5251BS (same VZ, ZZT, IR, and PD). Pin mapping differs (A1/A2/A3 and C1/C2/C3), so PCB layout must follow the triple-diode SOT363 footprint, not three SOD-123 pads.
Is thermal derating required when operating at 105°C ambient?
Yes - the device's 200 mW power rating assumes 25°C ambient. At 105°C, derating follows the linear curve in Figure 1: PD = 200 mW × (1 − (105 − 25)/125) = 40 mW. This limits usable Zener current to ~1.8 mA at 22 V, requiring careful thermal design or reduced bias in high-temp applications.
Does this device support bidirectional ESD protection?
No - the MMBZ5251BTS-7-F is a unidirectional Zener diode array optimized for forward-biased anode-to-cathode clamping. It lacks symmetric breakdown characteristics needed for bidirectional TVS action. For ESD protection, use dedicated bidirectional TVS arrays like D3V3Z5U-7-F or SP1003-01UTG.
MMBZ5251BTS-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:
- 3 Independent
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 29 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 17 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
MMBZ5251BTS-7-F FAQ
1.How can I place an order for MMBZ5251BTS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5251BTS-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 MMBZ5251BTS-7-F reliable?
The price and inventory of MMBZ5251BTS-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 MMBZ5251BTS-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5251BTS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5251BTS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5251BTS-7-F?
MMBZ5251BTS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5251BTS-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 MMBZ5251BTS-7-F?
For technical support, including MMBZ5251BTS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5251BTS-7-F requirements.
6.How does Aetrix verify that MMBZ5251BTS-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5251BTS-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 MMBZ5251BTS-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5251BTS-7-F?
All MMBZ5251BTS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5251BTS-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 MMBZ5251BTS-7-F part is unused and in its original packaging.
Return procedure for MMBZ5251BTS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5251BTS-7-F Tags
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Diodes Incorporated
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