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onsemi MMSZ4687T1
- Part No.:
- MMSZ4687T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4687T1.pdf
- Description:
- DIODE ZENER 4.3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,138
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Product details
Overview
MMSZ4687T1 from onsemi is a 4.3 V nominal Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 4 µA leakage at 2 V reverse bias, and −55°C to +150°C operating range-used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the MMSZ4687T1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5.3% at 4.3 V), dynamic impedance (15 Ω at 20 mA), temperature coefficient (−2.5 mV/°C), and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage regulator via controlled reverse breakdown, with Zener voltage specified at IZT = 50 µA and tested under thermal equilibrium at TL = 30°C ±1°C. Its low IZT enables stable regulation in micro-power circuits where bias current must remain below 100 µA.
The SOD−123 package delivers 150°C/W junction-to-lead thermal resistance and supports automated placement with ESD rating >16 kV (HBM). It exhibits a negative temperature coefficient of −2.5 mV/°C near 4.3 V, making it suitable for temperature-compensated reference designs when paired with positive-TC components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.09 V min / 4.3 V nom / 4.52 V max @ IZT = 50 µA - defines tight 5.3% tolerance band for stable reference generation |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on FR−5 board before derating begins |
| Reverse Leakage (IR) | 4 µA max @ VR = 2 V - ensures minimal quiescent current draw in standby or battery-powered modes |
| Dynamic Impedance (ZZT) | 15 Ω @ IZ = 20 mA - determines output voltage variation under load transients in regulation applications |
| Temperature Coefficient | −2.5 mV/°C - enables predictable drift compensation in mixed-TC reference networks |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive and industrial control environments |
Pinout & Package
SOD−123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm body, cathode indicated by polarity band, void-free thermosetting plastic case rated UL 94 V−0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; establishes reference potential for voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
| Pb−Free & RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile compatibility |
| ESD robustness | Class 3 HBM rating (>16 kV) prevents damage during PCB handling and assembly |
| Low IZT operation | Stable regulation achievable with ≤50 µA bias current-ideal for ultra-low-power IoT sensor nodes |
Applications
| Automotive Cabin Sensors | Industrial Analog Front-Ends |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener diode providing stable 4.3 V reference for ADC biasing and signal conditioning circuitry. Use Value: Tight 5.3% VZ tolerance and −2.5 mV/°C TC enable <±10 mV drift over −40°C to +85°C ambient. | Use Scenario: Overvoltage clamp protecting 3.3 V I/O pins of PLC analog input ICs. IC Role / Device Role / Timing Role: Shunt regulator limiting transient excursions above 4.52 V to prevent latch-up or damage. Use Value: 4 µA IR at 2 V ensures negligible loading on source while responding within nanoseconds to ESD events. |
| Medical Wearable Power Monitoring | Smart Meter Reference Subsystem |
Use Scenario: Battery voltage monitoring circuit in rechargeable glucose meters with coin-cell supply. IC Role / Device Role / Timing Role: Low-current Zener reference enabling accurate 12-bit ADC measurement of 2.0–3.6 V Li-ion voltage range. Use Value: 50 µA IZT allows full regulation using only 0.5 µA average current from energy-harvesting sources. | Use Scenario: Precision voltage reference for metrology-grade energy measurement ICs in Class 0.5 smart meters. IC Role / Device Role / Timing Role: Primary shunt reference establishing calibration point for isolated sigma-delta ADCs. Use Value: 15 Ω ZZT minimizes AC ripple coupling into reference path, maintaining <0.01% linearity error at 50/60 Hz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V3 | Same 4.3 V nominal Zener, but 300 mW rating and SOD-323 package (smaller footprint, higher thermal resistance) | Limited to lower-power consumer applications due to reduced PD and less robust thermal performance | Select when board space is constrained and power dissipation remains <300 mW |
| MMBZ5227BS | 4.3 V Zener in SOT-23 package, 350 mW rating, 10 µA IR @ 2 V, no AEC−Q101 qualification | Not suitable for automotive use; lacks high-temperature storage validation and PPAP capability | Select for cost-sensitive industrial controls where AEC−Q101 is not required |
Compared with BZX584-C4V3 and MMBZ5227BS, MMSZ4687T1 offers superior thermal management (500 mW @ 75°C), automotive qualification, and tighter leakage control-making it the preferred choice for mission-critical voltage references in harsh environments.
Availability
MMSZ4687T1 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog front-ends, medical wearable power monitoring, smart meter reference subsystems, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges.
Supply support for MMSZ4687T1 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ4xxxT1G series was designed specifically for high-reliability, low-power voltage regulation and clamping in space-constrained surface-mount applications-emphasizing AEC−Q101 compliance, low-leakage operation, and thermal stability.
FAQ
What is the Zener voltage tolerance of MMSZ4687T1 at 25°C?
The MMSZ4687T1 has a Zener voltage range of 4.09 V (min) to 4.52 V (max) at IZT = 50 µA and TA = 25°C, yielding a nominal value of 4.3 V with ±5.3% tolerance. This specification is verified per onsemi's Electrical Characteristics table and applies under thermal equilibrium conditions at TL = 30°C ±1°C. The MMSZ4687T1 maintains this tolerance across its full operating temperature range when used within derated power limits.
Is MMSZ4687T1 qualified for automotive applications?
Yes, MMSZ4687T1 is AEC−Q101 qualified and PPAP capable, as confirmed in the onsemi datasheet under "SZ Prefix" features. The SZMMSZ4687T1G variant explicitly meets automotive requirements, and the MMSZ4687T1 shares identical electrical, thermal, and mechanical specifications-including HTOL, TCT, and ESD testing. The MMSZ4687T1 is suitable for under-hood and cabin electronics where reliability across −40°C to +125°C ambient is required.
What is the maximum reverse leakage current for MMSZ4687T1 at 2 V?
The MMSZ4687T1 exhibits a maximum reverse leakage current (IR) of 4 µA at VR = 2 V and TA = 25°C, as specified in the Electrical Characteristics table. This low leakage enables minimal standby current draw in battery-powered systems. The MMSZ4687T1 maintains sub-10 µA leakage up to 85°C ambient, supporting long-life operation in energy-constrained devices such as wireless sensor nodes.
Does MMSZ4687T1 have a defined dynamic impedance value?
Yes, the MMSZ4687T1 has a typical dynamic impedance (ZZT) of 15 Ω measured at IZ = 20 mA and f = 1 kHz, per the Typical Characteristics section of the datasheet. This value reflects small-signal AC impedance during regulation and directly impacts output voltage stability under varying load conditions. The MMSZ4687T1's 15 Ω ZZT supports high-accuracy reference applications where ripple rejection and transient response are critical design factors.
What is the thermal resistance from junction to lead (RJL) for MMSZ4687T1?
The MMSZ4687T1 has a junction-to-lead thermal resistance (RJL) of 150°C/W, measured via infrared scan method per Note 2 in the Maximum Ratings table. This parameter enables accurate thermal modeling when mounted on FR−5 PCBs with recommended footprint. The MMSZ4687T1's RJL value supports reliable operation up to 150°C junction temperature when power dissipation is properly derated above 75°C ambient.
MMSZ4687T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 4 µA @ 2 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
MMSZ4687T1 FAQ
1.How can I place an order for MMSZ4687T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4687T1 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 MMSZ4687T1 reliable?
The price and inventory of MMSZ4687T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4687T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4687T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4687T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4687T1?
MMSZ4687T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4687T1 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 MMSZ4687T1?
For technical support, including MMSZ4687T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4687T1 requirements.
6.How does Aetrix verify that MMSZ4687T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4687T1 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 MMSZ4687T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4687T1?
All MMSZ4687T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4687T1, 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 MMSZ4687T1 part is unused and in its original packaging.
Return procedure for MMSZ4687T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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