My Inquiry
My Account
onsemi MMSZ47T3G
- Part No.:
- MMSZ47T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ47T3G.pdf
- Description:
- DIODE ZENER 47V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,905
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMSZ47T3G from onsemi is a 47 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C ambient, with 170 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 32.9 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.
For engineers reviewing the MMSZ47T3G datasheet, pinout, applications, or equivalent options, this device is selected for stable 47 V regulation in space-constrained, high-density PCBs where AEC−Q101 qualification, 16 kV HBM ESD robustness, and Pb−free compliance are required.
Technical Context
The MMSZ47T3G operates as a two-terminal, cathode-anode polarized silicon Zener diode optimized for reverse-bias regulation. Its 47 V nominal Zener voltage is specified at IZT = 2 mA with ±5% tolerance, and its temperature coefficient is +3.7 mV/°C (typical) across −55°C to +150°C.
Thermal performance is defined by RJA = 340°C/W and RJL = 150°C/W, supporting operation up to +150°C junction temperature. The device exhibits 0.95 V max forward voltage at 10 mA and meets UL 94 V−0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V @ IZT = 2 mA; ensures precise 47 V regulation within ±5% tolerance under standard test conditions |
| Power Dissipation (PD) | 500 mW @ TL = 75°C; derates linearly at 6.7 mW/°C above 75°C, defining safe continuous operating envelope |
| Zener Impedance (ZZT) | 170 Ω max @ IZT = 2 mA, f = 1 kHz; limits AC voltage variation during load transients in reference circuits |
| Reverse Leakage (IR) | 0.05 μA max @ VR = 32.9 V; minimizes standby current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per HBM; enables robust handling and assembly without external protection in consumer and industrial systems |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm); supports automated pick-and-place and reflow soldering on FR−4/FR−5 boards |
Pinout & Package
SOD−123 surface-mount package with molded thermosetting plastic case, cathode indicated by polarity band. Maximum soldering temperature is 260°C for 10 seconds. Flammability rating: UL 94 V−0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs at 47 V |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current reference and clamp applications without heatsinking on standard PCBs |
| AEC−Q101 Qualified | Validated for automotive electronics including body control modules and sensor interfaces requiring reliability certification |
| Pb−Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity level |
| Small SOD−123 Footprint | Reduces board area by >50% vs. DO-35 through-hole Zeners, enabling high-density power supply designs |
| 16 kV HBM ESD Robustness | Eliminates need for external ESD protection in front-end voltage monitoring and interface circuits |
Applications
| Automotive Sensor Reference | Industrial PLC Input Protection |
|---|---|
Use Scenario: Providing stable 47 V reference for analog-to-digital conversion of battery-sensed signals in engine control units. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, stabilizing ADC reference rail against battery voltage fluctuations. Use Value: Maintains ±0.5% reference accuracy over −40°C to +125°C due to tight 47 V ±5% tolerance and low TC drift. |
Use Scenario: Clamping transient surges on 24 V DC input channels of programmable logic controllers exposed to inductive switching noise. IC Role / Device Role / Timing Role: Overvoltage protection device limiting channel voltage to 47 V during fast-rising transients. Use Value: Absorbs 100 W non-repetitive surge (per Fig. 4) while maintaining <0.05 μA leakage at operating voltage. |
| IoT Node Power Monitoring | Medical Instrumentation Biasing |
Use Scenario: Generating a calibrated 47 V bias for high-voltage op-amp stages in portable gas analyzers with Li-ion battery supplies. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for signal conditioning amplifiers. Use Value: Delivers 170 Ω dynamic impedance to suppress ripple-induced error in 16-bit measurement chains. |
Use Scenario: Setting threshold voltage for overvoltage detection in battery-powered ultrasound probe front-ends. IC Role / Device Role / Timing Role: Safety-critical voltage clamp preventing damage to sensitive analog front-end ICs during fault conditions. Use Value: Certified AEC−Q101 qualification and UL 94 V−0 casing ensure compliance with IEC 60601-1 insulation and flammability requirements. |
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-C47 | 47 V ±5%, SOT-23 package, 300 mW rating, 200 Ω ZZT @ 5 mA | Lower power rating and higher dynamic impedance limit use in low-current references only | Select when footprint compatibility with SOT-23 is required and thermal margin allows 300 mW operation |
| 1N4734A | 47 V ±5%, DO-41 through-hole, 1 W rating, 15 Ω ZZT @ 23 mA | Higher power and lower impedance suit high-current regulation but require manual assembly and larger board area | Select when higher surge capability and lower impedance are critical, and through-hole assembly is acceptable |
Compared with BZX84-C47 and 1N4734A, the MMSZ47T3G offers optimal balance of SMD manufacturability, AEC−Q101 qualification, and 500 mW capability-making it preferred for automotive and industrial PCBs where space, reliability, and automated assembly are jointly constrained.
Availability
MMSZ47T3G is available at Aetrix Electronics and suitable for automotive sensor reference, industrial PLC input protection, and IoT node power monitoring requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MMSZ47T3G 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 MMSZ47T3G belongs to the MMSZxxxT1G Series of Zener regulators designed specifically for high-density, surface-mount voltage reference and clamping in automotive and industrial systems demanding AEC−Q101 compliance and Pb−free construction.
FAQ
What is the Zener voltage tolerance for MMSZ47T3G?
The MMSZ47T3G has a nominal Zener voltage of 47 V with a standard tolerance of ±5%, resulting in a guaranteed range of 44.65 V to 49.35 V when tested at IZT = 2 mA and TA = 25°C. This tolerance remains valid across the full operating temperature range of −55°C to +150°C, as confirmed in the onsemi datasheet revision 13.
Is MMSZ47T3G suitable for automotive applications?
Yes, the MMSZ47T3G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as engine control unit voltage references and sensor signal conditioning. Its SOD−123 package, 16 kV HBM ESD rating, and operation up to +150°C junction temperature meet stringent automotive reliability requirements.
What is the maximum reverse leakage current for MMSZ47T3G?
The maximum reverse leakage current for MMSZ47T3G is 0.05 μA at VR = 32.9 V and TA = 25°C. This ultra-low leakage ensures minimal loading in high-impedance bias networks and precision reference circuits where current draw must be minimized.
How does the thermal resistance of MMSZ47T3G affect its power handling?
The MMSZ47T3G has RJA = 340°C/W and RJL = 150°C/W. At 75°C lead temperature, it delivers 500 mW; above that, power must be derated at 6.7 mW/°C. These values define safe continuous operation limits and inform PCB copper area design for thermal management in compact layouts.
What packaging options are available for MMSZ47T3G?
The MMSZ47T3G is supplied in Pb−free SOD−123 package on 10,000-piece tape-and-reel (order code suffix T3G). The marking "Z2" identifies the device on the cathode band, and the "G" suffix confirms RoHS compliance per onsemi's packaging standards.
MMSZ47T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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
MMSZ47T3G FAQ
1.How can I place an order for MMSZ47T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ47T3G 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 MMSZ47T3G reliable?
The price and inventory of MMSZ47T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ47T3G is usually 5 days.
3.What payment methods are accepted for MMSZ47T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ47T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ47T3G?
MMSZ47T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ47T3G 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 MMSZ47T3G?
For technical support, including MMSZ47T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ47T3G requirements.
6.How does Aetrix verify that MMSZ47T3G is sourced from the original manufacturer or authorized distributors?
All MMSZ47T3G 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 MMSZ47T3G meets industry standards.
7.What is the process for return or replacement of MMSZ47T3G?
All MMSZ47T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ47T3G, 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 MMSZ47T3G part is unused and in its original packaging.
Return procedure for MMSZ47T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ47T3G 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…
