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onsemi MMBZ5244ELT1G
- Part No.:
- MMBZ5244ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5244ELT1G.pdf
- Description:
- DIODE ZENER 14V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,024
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Product details
Overview
MMBZ5244ELT1G from onsemi is a 14 V, 225 mW surface-mount Zener diode in SOT-23 package, with 9 Ω dynamic impedance at 9 mA test current, 0.1 µA leakage at 10 V reverse bias, and ±5% voltage tolerance. It regulates voltage in low-power analog rails, ESD protection clamps, and reference circuits for portable battery-powered systems.
For engineers reviewing the MMBZ5244ELT1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, SOT-23 terminal mapping, and validated alternative parts for voltage reference and overvoltage clamp designs.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. Its nominal 14 V Zener voltage is specified at IZT = 9 mA with temperature coefficient of +3.5 mV/°C (typical), enabling stable regulation across −65°C to +150°C junction range.
It features Class 3 HBM ESD rating (>16 kV), 225 W peak pulse power handling (8 × 20 µs), and 556 °C/W thermal resistance on FR-5 board - confirming suitability for space-constrained, high-density PCB layouts where transient suppression and precision biasing coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3–14.7 V @ IZT = 9 mA; ensures ±5% regulation accuracy for 14 V reference rails |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5; supports continuous operation in handheld thermal envelopes |
| Zener Impedance (ZZT) | 15 Ω @ IZT = 9 mA; maintains low output impedance for stable voltage under load variation |
| Leakage Current (IR) | 0.1 µA @ VR = 10 V; minimizes quiescent current draw in battery-backed circuits |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board; defines maximum ambient rise before reaching 150°C junction limit |
| ESD Rating | Class 3 (>16 kV) per HBM; provides robust input-stage ESD immunity without external protection |
| Package | SOT-23 (TO-236); enables automated placement and 2.9 mm × 1.3 mm footprint for high-density routing |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting body, Pb-free, UL 94 V-0 rated, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; reverse-biased during regulation mode |
| 2 (No Connection) | Unused internal terminal | Electrically isolated; no PCB trace or solder pad required |
| 3 (Cathode) | Zener breakdown terminal / regulated output node | Connected to supply rail needing stabilization; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW power rating on FR-4/FR-5 | Enables use in compact consumer PCBs without heatsinking or layout derating |
| ESD rating >16 kV (HBM Class 3) | Eliminates need for discrete ESD diodes in front-end protection stages |
| Peak pulse power: 225 W (8 × 20 µs) | Clamps fast transients (e.g., IEC 61000-4-5 surges) without failure |
| Pb-free and RoHS-compliant | Meets global environmental compliance requirements for commercial and industrial shipments |
| −65°C to +150°C operating range | Supports deployment in automotive cabin modules and industrial edge sensors |
Applications
| Portable Power Rail Regulation | ESD Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing 14 V bias voltage for op-amp input stages in battery-powered medical monitors. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining precise reference despite Li-ion battery discharge curve (3.0–4.2 V per cell × 3). Use Value: Delivers <±5% regulation accuracy with only 0.1 µA leakage, extending runtime in ultra-low-power modes. |
Use Scenario: Protecting USB data lines against human-body ESD events in smartphone docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<2 pF) clamping diode placed between D+ and ground to divert >15 kV HBM strikes. Use Value: Achieves sub-10 ns response with no signal integrity degradation due to SOT-23 parasitic inductance. |
| Low-Power Sensor Reference | Industrial Signal Conditioning |
|
Use Scenario: Providing excitation voltage for 4–20 mA loop-powered pressure transducers in HVAC controllers. IC Role / Device Role / Timing Role: Precision Zener reference sourcing stable 14 V to bridge amplifier circuitry under varying loop supply (12–36 V DC). Use Value: Maintains <15 Ω dynamic impedance across 5–15 mA load range, minimizing gain drift in analog front ends. |
Use Scenario: Biasing gate drivers in 24 V PLC output modules exposed to inductive kickback. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping gate-source voltage to prevent MOSFET overvoltage failure. Use Value: Withstands 225 W pulses without parametric shift, ensuring long-term reliability in factory automation environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15LT1G | 15 V nominal, ±6% tolerance, 300 mW PD, 30 Ω ZZT @ 5 mA | Higher power but looser voltage tolerance and higher impedance; less stable under variable load | Select when wider voltage margin is acceptable and higher surge energy must be absorbed |
| MMBZ5243ELT1G | 13 V nominal, ±5% tolerance, 9.5 mA IZT, 13 Ω ZZT | Lower regulation voltage with tighter impedance spec; better for 12 V system references | Choose for 12–13 V rail stabilization where lower forward drop and reduced thermal stress are prioritized |
Compared with MMBZ5244ELT1G, BZX84-C15LT1G trades regulation precision for higher pulse robustness, while MMBZ5243ELT1G offers improved low-current impedance at 13 V - making each suitable for distinct voltage-tier and stability-critical design points.
Availability
MMBZ5244ELT1G is available at Aetrix Electronics and suitable for portable electronics, industrial sensor interfaces, and automotive infotainment subsystems requiring stable component supply and full traceability.
Supply support for MMBZ5244ELT1G 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxELT1G series is part of onsemi's precision Zener regulator portfolio, engineered for space-constrained, high-reliability voltage reference and transient suppression in portable and harsh-environment electronics.
FAQ
What is the exact Zener voltage tolerance for MMBZ5244ELT1G?
The MMBZ5244ELT1G has a guaranteed Zener voltage range of 13.3 V to 14.7 V at IZT = 9 mA and TA = 25°C, corresponding to ±5% tolerance around the nominal 14 V rating. This tolerance remains valid across the full −65°C to +150°C junction temperature range per datasheet specifications.
Can MMBZ5244ELT1G replace MMBZ5243ELT1G in a 13 V reference circuit?
No - MMBZ5244ELT1G is not a direct replacement for MMBZ5243ELT1G in a 13 V reference circuit because its nominal Zener voltage is 14 V (min 13.3 V, max 14.7 V), whereas MMBZ5243ELT1G is rated at 13 V (min 12.35 V, max 13.65 V). Using MMBZ5244ELT1G would raise the regulated voltage by ~1 V, potentially exceeding downstream IC absolute maximum ratings.
What is the maximum continuous reverse current MMBZ5244ELT1G can handle at 25°C ambient?
At TA = 25°C on an FR-5 board, MMBZ5244ELT1G supports up to 15.9 mA continuous reverse current, calculated from PD = 225 mW and VZ ≈ 14 V (225 mW ÷ 14 V ≈ 16.1 mA), with derating applied above 25°C at 1.8 mW/°C per the datasheet's thermal specification.
Does MMBZ5244ELT1G have a built-in capacitor or require external filtering?
MMBZ5244ELT1G is a discrete Zener diode with no integrated capacitance; its typical junction capacitance is <2 pF at 0 V bias. External RC filtering is optional and application-dependent - used only when high-frequency noise rejection is needed beyond the inherent bandwidth limitation imposed by its 15 Ω dynamic impedance and package parasitics.
Is MMBZ5244ELT1G qualified for automotive applications?
MMBZ5244ELT1G is not AEC-Q101 qualified; only the SZMMBZ5244ELT1G variant (with SZ prefix) meets AEC-Q101 requirements and PPAP capability for automotive use. The standard MMBZ5244ELT1G is intended for commercial and industrial applications per its datasheet classification and qualification scope.
MMBZ5244ELT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5244ELT1G FAQ
1.How can I place an order for MMBZ5244ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5244ELT1G 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 MMBZ5244ELT1G reliable?
The price and inventory of MMBZ5244ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5244ELT1G is usually 5 days.
3.What payment methods are accepted for MMBZ5244ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5244ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5244ELT1G?
MMBZ5244ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5244ELT1G 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 MMBZ5244ELT1G?
For technical support, including MMBZ5244ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5244ELT1G requirements.
6.How does Aetrix verify that MMBZ5244ELT1G is sourced from the original manufacturer or authorized distributors?
All MMBZ5244ELT1G 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 MMBZ5244ELT1G meets industry standards.
7.What is the process for return or replacement of MMBZ5244ELT1G?
All MMBZ5244ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5244ELT1G, 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 MMBZ5244ELT1G part is unused and in its original packaging.
Return procedure for MMBZ5244ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5244ELT1G Tags
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