My Inquiry
My Account
onsemi MMSZ4689T3
- Part No.:
- MMSZ4689T3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4689T3.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,630
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ4689T3 from onsemi is a 5.1 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 10 µA leakage current at 3 V reverse bias, and −55°C to +150°C operating temperature range-used for precision voltage reference and overvoltage protection in low-power sensor interfaces.
For engineers reviewing the MMSZ4689T3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, dynamic impedance at 20 mA, temperature coefficient, ESD robustness (Class 3 HBM >16 kV), and SOD−123 thermal resistance (RJL = 150°C/W).
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener breakdown threshold. It exhibits low dynamic impedance (ZZT ≈ 70 Ω at IZ = 20 mA) and a positive temperature coefficient near 5.1 V (≈ +2.5 mV/°C), enabling predictable drift compensation in reference circuits.
Designed for surface-mount assembly on FR-4/FR-5 PCBs, the MMSZ4689T3 delivers consistent regulation under transient conditions, with non-repetitive surge capability up to 40 W for 1 ms pulses and full compliance with AEC-Q101 when ordered as SZMMSZ4689T3G.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85 V min / 5.1 V nom / 5.36 V max @ IZT = 50 µA - defines tight regulation window for 5 V rail clamping. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous thermal load on standard PCB layout. |
| Leakage Current (IR) | 10 µA @ VR = 3 V - ensures minimal standby current draw in battery-powered circuits. |
| Dynamic Impedance (ZZT) | 70 Ω @ IZ = 20 mA - determines output voltage stability under varying load current. |
| ESD Rating | Class 3 (>16 kV) per HBM - protects against handling-induced electrostatic discharge during assembly. |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments. |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band, UL 94 V−0 flammability rating, and 260°C soldering tolerance for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential reference; completes shunt regulation path. |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT test current | 50 µA enables stable Zener voltage measurement without excessive bias current in ultra-low-power designs. |
| Pb-Free & RoHS compliant | Meets global environmental regulations and reflow compatibility requirements for lead-free assembly processes. |
| Optimized for automated placement | SOD−123 footprint supports high-speed pick-and-place with minimal tombstoning risk on fine-pitch layouts. |
| High-density packaging | Compact 1.60 × 2.69 mm outline allows integration into space-constrained IoT sensor modules and wearables. |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing ADC reference voltage in 4–20 mA loop transmitters exposed to ambient temperature swings from −40°C to +85°C. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.1 V bias for op-amp input stages and analog front-end scaling. Use Value: Tight 5% VZ tolerance and +2.5 mV/°C TC enable <±10 mV total drift over full temperature range without calibration. |
Use Scenario: Overvoltage clamp protecting LIN bus transceiver inputs against load-dump transients up to 40 V in door module ECUs. IC Role / Device Role / Timing Role: Transient voltage suppression element placed between LIN line and ground, triggered above 5.36 V. Use Value: 500 mW rating and 40 W 1 ms surge capability absorb energy without failure during ISO 7637-2 Pulse 1/2a events. |
| Medical Wearable Battery Monitoring | Smart Home Zigbee Node Power Management |
Use Scenario: Monitoring single-cell Li-ion battery voltage (2.8–4.2 V) using microcontroller ADC with internal 1.1 V reference. IC Role / Device Role / Timing Role: Precision voltage divider bias element ensuring accurate scaling of battery voltage into ADC input range. Use Value: 10 µA IR at 3 V minimizes quiescent current drain, extending runtime in always-on health monitoring mode. |
Use Scenario: Regulating 3.3 V supply rail for RF SoC in battery-powered smart plug, where input varies from 3.0–5.5 V via buck converter. IC Role / Device Role / Timing Role: Secondary shunt regulator trimming output voltage and absorbing excess current during light-load conditions. Use Value: 70 Ω ZZT maintains <±15 mV output variation across 0–10 mA load changes, improving RF transmit consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1 | Same 5.1 V nominal Zener, but SOT-23 package (higher RJA = 300°C/W), 350 mW rating, 5 µA IR @ 3 V. | Higher thermal resistance limits use in high-ambient-temp PCB areas; lower leakage benefits ultra-low-power sleep modes. | Select when board space permits SOT-23 and leakage <5 µA is critical; avoid if thermal derating below 75°C is required. |
| MMBZ5221BS | 5.1 V Zener in SOT-23, 225 mW rating, 100 µA IZT, 10 µA IR @ 3 V, higher ZZT (~170 Ω). | Lower power rating restricts use to signal-level clamping only; higher dynamic impedance reduces regulation accuracy under load. | Choose only for cost-sensitive consumer applications where regulation precision and surge immunity are secondary. |
Compared with BZX84-C5V1 and MMBZ5221BS, the MMSZ4689T3 offers superior thermal performance (500 mW @ 75°C vs. ≤350 mW), tighter VZ tolerance (±5% vs. ±5% but wider min/max spread), and lower ZZT-making it preferred for industrial and automotive voltage reference roles requiring long-term stability.
Availability
MMSZ4689T3 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body electronics, and medical wearable power monitoring requiring stable component supply and AEC-Q101 traceability.
Supply support for MMSZ4689T3 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The MMSZ4xxxT3G series was developed to deliver high-reliability, low-leakage Zener regulation in compact SOD−123 packages for space-constrained, thermally demanding applications across automotive and industrial end equipment.
FAQ
What is the Zener voltage tolerance of the MMSZ4689T3?
The MMSZ4689T3 has a Zener voltage specification of 4.85 V minimum, 5.1 V nominal, and 5.36 V maximum at IZT = 50 µA, corresponding to a ±5% tolerance around the nominal value. This tolerance is guaranteed across the full operating temperature range of −55°C to +150°C and is verified per onsemi's production test flow. The MMSZ4689T3 datasheet confirms this range on page 3 under Electrical Characteristics.
Is the MMSZ4689T3 suitable for automotive applications?
Yes-the MMSZ4689T3 is qualified to AEC-Q101 when ordered as the SZMMSZ4689T3G variant, which includes additional process controls, traceability, and PPAP documentation. While the standard MMSZ4689T3 shares identical electrical and thermal specs, only the SZ-prefix version is certified for automotive use. Designers must specify SZMMSZ4689T3G for under-hood or safety-critical modules.
What is the maximum surge power the MMSZ4689T3 can handle?
The MMSZ4689T3 supports up to 40 W of non-repetitive peak surge power for pulse widths of 1 ms at TA = 25°C, as shown in Figure 4 of the onsemi datasheet. This capability enables reliable transient suppression in applications like LIN bus clamping or microcontroller I/O protection, provided pulse repetition is limited to allow junction cooling between events.
Does the MMSZ4689T3 have a specified temperature coefficient?
Yes-the MMSZ4689T3 exhibits a typical temperature coefficient of +2.5 mV/°C near its 5.1 V operating point, as confirmed by Figure 1 and the Typical TC Values table in the onsemi datasheet. This positive coefficient allows predictable voltage drift with temperature, supporting compensation techniques in precision reference designs where absolute stability is less critical than monotonic behavior.
What is the dynamic impedance (ZZT) of the MMSZ4689T3 at 20 mA?
The MMSZ4689T3 has a dynamic impedance (ZZT) of 70 Ω at IZ = 20 mA and TJ = 25°C, per Figure 5 in the onsemi datasheet. This value quantifies how tightly the device regulates voltage under changing load current-lower ZZT indicates better regulation fidelity, making the MMSZ4689T3 suitable for applications requiring <±15 mV output variation across moderate load shifts.
MMSZ4689T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 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:
- SOD-123
MMSZ4689T3 FAQ
1.How can I place an order for MMSZ4689T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4689T3 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 MMSZ4689T3 reliable?
The price and inventory of MMSZ4689T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4689T3 is usually 5 days.
3.What payment methods are accepted for MMSZ4689T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4689T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4689T3?
MMSZ4689T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4689T3 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 MMSZ4689T3?
For technical support, including MMSZ4689T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4689T3 requirements.
6.How does Aetrix verify that MMSZ4689T3 is sourced from the original manufacturer or authorized distributors?
All MMSZ4689T3 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 MMSZ4689T3 meets industry standards.
7.What is the process for return or replacement of MMSZ4689T3?
All MMSZ4689T3 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4689T3, 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 MMSZ4689T3 part is unused and in its original packaging.
Return procedure for MMSZ4689T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ4689T3 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…
