My Inquiry
My Account
onsemi MM3Z43VB
- Part No.:
- MM3Z43VB
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
MM3Z43VB.pdf
- Description:
- DIODE ZENER 43V 200MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:9,781
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MM3Z43VB from onsemi is a 43 V, ±2% tolerance Zener diode in SOD−323FL package, rated for 200 mW power dissipation and 141 Ω dynamic impedance at 2 mA test current, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MM3Z43VB datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy (42.14–43.86 V), low leakage current (≤45 nA at 30.1 V), thermal resistance (595 °C/W), and SOD−323FL footprint compatibility with space-constrained PCB layouts.
Technical Context
The MM3Z43VB operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable output voltage under varying load and temperature conditions. Its 43 V nominal Zener voltage is specified at 2 mA test current (IZT) with tight ±2% tolerance and 141 Ω dynamic impedance (ZZT).
Designed for surface-mount use in SOD−323FL package, it features matte tin (Pb−free) finish and supports operation across −65 °C to +150 °C storage range and up to 150 °C junction temperature. Reverse leakage current remains ≤45 nA at VR = 30.1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.14–43.86 V at IZT = 2 mA - ensures precise clamping within ±2% of 43 V nominal |
| Power Dissipation (PD) | 200 mW - limits continuous thermal stress in compact SOD−323FL layout |
| Zener Impedance (ZZT) | 141 Ω at IZT = 2 mA - defines voltage regulation stiffness under small-signal variations |
| Reverse Leakage (IR) | ≤45 nA at VR = 30.1 V - guarantees minimal standby current in battery-powered sensing nodes |
| Junction Temperature (TJ) | 150 °C maximum - enables reliable operation in industrial ambient environments |
| Thermal Resistance (RJA) | 595 °C/W - requires careful copper area allocation for thermal management in high-density boards |
Pinout & Package
SOD−323FL package: ultra-compact surface-mount outline (1.7 mm × 1.25 mm × 0.95 mm height), matte tin (Pb−free) terminations, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail during Zener operation |
| 2 (Cathode) | Reverse-biased Zener terminal / Regulated output node | Provides stable 43 V reference when biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct replacement in 43 V reference designs without recalibration |
| SOD−323FL ultra-small footprint | Reduces PCB area by >50% vs. DO-35 or SOD-123 packages in wearables and IoT sensors |
| Pb−free matte tin finish | Meets RoHS/REACH requirements and eliminates lead-based solder compatibility concerns |
| Low 45 nA leakage at 30.1 V | Preserves battery life in always-on monitoring circuits with multi-year runtime targets |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 16-bit ADC front-end in temperature transmitters operating at 85 °C ambient. IC Role / Device Role / Timing Role: Zener diode providing 43 V shunt regulation to protect op-amp input stage from transient overvoltage. Use Value: Maintains <±0.5% reference drift over temperature due to tight 43 V ±2% tolerance and low ZZT. | Use Scenario: Overvoltage clamp on VBUS line during USB-C PD negotiation bursts reaching 30 V+. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting VBUS to safe margin below 43 V breakdown threshold. Use Value: Limits peak excursion to ≤43.86 V with 141 Ω dynamic impedance, preventing damage to downstream buck controller. |
| Medical Pulse Oximeter Bias Supply | Automotive Body Control Module Reset Circuit |
Use Scenario: Generating stable bias for red/IR LED drivers in portable pulse oximeters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage (≤45 nA) Zener reference enabling microamp-level standby current compliance. Use Value: Extends battery life beyond 12 months while maintaining 43 V regulation accuracy for LED current control. | Use Scenario: Supervisory reset threshold element in 12 V automotive BCMs exposed to load-dump transients. IC Role / Device Role / Timing Role: Clamping transient spikes above 30.1 V to prevent false MCU resets during alternator switching events. Use Value: Withstands 150 °C junction temperature and delivers predictable 43 V clamping across −40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B43,115 (Nexperia) | Same 43 V ±2%, SOD-323 package, but 300 mW rating and 150 Ω ZZT at 5 mA | Higher power handling suits higher-current clamping; slightly higher impedance affects regulation precision | Select for designs needing >200 mW margin or where 5 mA test current aligns with system bias point |
| MMBZ5257B (onsemi) | 43 V ±5%, SOT-23 package, 350 mW rating, 23 Ω ZZT at 20 mA | Larger footprint and looser tolerance; lower impedance benefits high-current regulation | Choose when board space allows SOT-23 and system tolerates ±5% VZ variation |
Compared with BZX384-B43,115 and MMBZ5257B, the MM3Z43VB offers tighter ±2% tolerance in the smallest SOD−323FL footprint, making it optimal for miniaturized, precision-referenced applications where leakage (<45 nA) and thermal resistance (595 °C/W) are critical constraints.
Availability
MM3Z43VB is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery clamp, and medical pulse oximeter bias supply requiring stable component supply and long-term lifecycle assurance.
Supply support for MM3Z43VB 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3Z series is part of onsemi's precision Zener diode portfolio designed specifically for space-constrained, low-power voltage regulation and overvoltage protection in portable and embedded systems.
FAQ
What is the Zener voltage tolerance of MM3Z43VB?
The MM3Z43VB has a guaranteed Zener voltage tolerance of ±2% at 25 °C, with a specified range of 42.14 V to 43.86 V at IZT = 2 mA. This tight tolerance enables use in precision reference applications without post-manufacturing calibration. The MM3Z43VB maintains this specification across its qualified operating temperature range and is tested per onsemi's Rev. 3 datasheet dated August 2023.
What package type does MM3Z43VB use?
MM3Z43VB uses the SOD−323FL package (Case 477AB), measuring 1.7 mm × 1.25 mm × 0.95 mm with matte tin (Pb−free) terminations. It features a cathode band marking on terminal 2 and is optimized for high-density PCB assembly. The MM3Z43VB's SOD−323FL footprint is standardized across the MM3Z2V4B–MM3Z75VB family and supported by industry reflow profiles.
What is the maximum power dissipation rating for MM3Z43VB?
The MM3Z43VB is rated for 200 mW maximum power dissipation at 25 °C ambient temperature. Derating is required above 25 °C per the thermal resistance RJA = 595 °C/W. At 85 °C ambient, usable power drops to approximately 120 mW. This rating applies to the MM3Z43VB in its standard SOD−323FL package with typical PCB copper area; actual dissipation depends on board layout and airflow.
How does MM3Z43VB perform at elevated temperatures?
The MM3Z43VB is characterized for operation up to 150 °C junction temperature and supports storage from −65 °C to +150 °C. Its Zener voltage exhibits predictable positive temperature coefficient behavior, with typical drift of +0.06%/°C near 43 V. The MM3Z43VB maintains ≤45 nA leakage at 30.1 V up to 125 °C, ensuring reliability in automotive and industrial environments.
Is MM3Z43VB RoHS compliant and lead-free?
Yes, MM3Z43VB is RoHS compliant and features matte tin (Sn) finish with no lead content. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and is qualified for Pb−free reflow soldering per IPC/JEDEC J-STD-020. The MM3Z43VB's Pb−free construction is documented in onsemi's official datasheet revision 3 (August 2023) and verified through certified material declarations.
MM3Z43VB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 141 Ohms
- Current - Reverse Leakage @ Vr:
- 45 nA @ 30.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
MM3Z43VB FAQ
1.How can I place an order for MM3Z43VB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z43VB 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 MM3Z43VB reliable?
The price and inventory of MM3Z43VB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z43VB is usually 5 days.
3.What payment methods are accepted for MM3Z43VB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z43VB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z43VB?
MM3Z43VB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z43VB 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 MM3Z43VB?
For technical support, including MM3Z43VB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z43VB requirements.
6.How does Aetrix verify that MM3Z43VB is sourced from the original manufacturer or authorized distributors?
All MM3Z43VB 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 MM3Z43VB meets industry standards.
7.What is the process for return or replacement of MM3Z43VB?
All MM3Z43VB units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z43VB, 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 MM3Z43VB part is unused and in its original packaging.
Return procedure for MM3Z43VB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z43VB Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
