My Inquiry
My Account
Diodes Incorporated BZX84C47Q-7-F
- Part No.:
- BZX84C47Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C47Q-7-F.pdf
- Description:
- DIODE ZENER 47V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C47Q-7-F from Diodes Incorporated is an automotive-grade 47 V, 350 mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power analog circuits. It delivers a nominal Zener voltage of 47 V at 2 mA test current, with ±6.4% tolerance (44–50 V), 170 Ω dynamic impedance at 2 mA, and <0.1 µA reverse leakage at 32.9 V, commonly used in power supply feedback loops and sensor biasing networks.
For engineers reviewing the BZX84C47Q-7-F datasheet, BZX84C47Q-7-F pinout, BZX84C47Q-7-F application, or BZX84C47Q-7-F equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (357 °C/W), AEC-Q101 qualification, SOT23 footprint compatibility, and low reverse leakage under partial bias conditions.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across varying load and temperature conditions. Its planar die construction ensures consistent voltage regulation, while the SOT23 package enables high-density PCB layouts and compatibility with automated pick-and-place assembly.
The device is rated for 350 mW power dissipation at ambient temperature, with thermal resistance of 357 °C/W when terminals are held at ambient - critical for derating calculations in enclosed or thermally constrained environments. Temperature coefficient is -3.5 mV/°C, indicating predictable negative drift with rising junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal at 2 mA; range 44–50 V ensures reliable clamping in 48 V rail monitoring. |
| Power Dissipation | 350 mW maximum - defines safe continuous operating limit under ambient cooling conditions. |
| Zener Impedance (ZZT) | 170 Ω at 2 mA - determines regulation stiffness and output voltage variation under load changes. |
| Reverse Leakage (IR) | <0.1 µA at 32.9 V - enables ultra-low standby current in battery-backed circuits. |
| Thermal Resistance (RθJA) | 357 °C/W - requires thermal pad design consideration for sustained power operation. |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift per degree rise, essential for temperature-critical references. |
| AEC-Q101 Qualified | Yes - validated for automotive electronics including engine control modules and body controllers. |
Pinout & Package
Package: SOT23 - surface-mount, 3-terminal plastic case with matte tin-plated Alloy 42 leadframe; UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to circuit ground or lower potential node during Zener operation. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Provides stable 47 V reference when reverse-biased; connects to feedback or clamp point. |
| No Connect (Pin 3) | Internal die attach flag / mechanical support | Not electrically connected; serves structural role in SOT23 mold compound anchoring. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including under-hood ECUs and infotainment power rails. |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets automotive environmental compliance. |
| Planar die construction | Ensures tight Zener voltage distribution and long-term stability under thermal cycling. |
| SOT23 footprint | Enables drop-in replacement in legacy designs and supports high-volume automated assembly. |
| Low reverse leakage | <0.1 µA at 32.9 V - preserves battery life in always-on vehicle subsystems. |
Applications
| Automotive Power Supply Monitoring | Industrial Sensor Biasing |
|---|---|
|
Use Scenario: Monitoring 48 V battery rail in ADAS camera modules to detect overvoltage events before system reset. IC Role / Device Role / Timing Role: Zener clamp protecting LDO input and microcontroller ADC reference. Use Value: Prevents damage from load dump transients up to 60 V by shunting excess current above 47 V threshold. |
Use Scenario: Providing stable bias voltage for MEMS pressure sensor signal conditioning in HVAC control units. IC Role / Device Role / Timing Role: Precision voltage reference for op-amp gain-setting network. Use Value: Maintains sensor linearity within ±0.5% error over −40°C to +125°C due to low tempco and stable Zener impedance. |
| Consumer USB-C PD Protection | Medical Wearable Battery Management |
|
Use Scenario: Overvoltage clamp on USB-C power delivery negotiation lines to protect CC logic ICs. IC Role / Device Role / Timing Role: Transient voltage suppressor for 20 V negotiation bus. Use Value: Limits voltage excursions to ≤47 V during ESD events without adding capacitance that disrupts PD communication timing. |
Use Scenario: Reference voltage source for lithium-ion cell voltage monitoring in portable ECG devices. IC Role / Device Role / Timing Role: Low-leakage Zener reference for 12-bit ADC front-end. Use Value: Enables >10-year shelf life by drawing <0.1 µA standby current, preserving coin-cell energy budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ47ET1G | Same 47 V nominal, but 500 mW rating and higher ZZT (250 Ω); no AEC-Q101 qualification. | Preferred for industrial non-automotive use where higher power margin is needed but automotive reliability not required. | Select when thermal headroom >350 mW is critical and AEC-Q101 is unnecessary. |
| BZX84-C47,115 | Identical electrical specs but standard (non-automotive) grade; RoHS-compliant but not AEC-Q101 tested. | Suitable for consumer electronics where cost sensitivity outweighs automotive qualification requirements. | Choose for cost-sensitive commercial designs lacking automotive environmental stress testing needs. |
Compared with MMSZ47ET1G and BZX84-C47,115, the BZX84C47Q-7-F uniquely combines AEC-Q101 qualification, green compound compliance, and SOT23 footprint - making it the only option qualified for safety-critical automotive voltage reference functions without redesign.
Availability
BZX84C47Q-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and medical wearable battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84C47Q-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
This part belongs to the BZX84C automotive Zener diode family, engineered specifically for AEC-Q101-compliant voltage regulation in harsh-environment electronic control units and power systems.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The BZX84C47Q-7-F has a nominal Zener voltage of 47 V at 2 mA test current, with a guaranteed breakdown range of 44–50 V. It begins regulating at approximately 44 V and maintains stable clamping up to its 350 mW power limit - exceeding 50 V risks thermal runaway unless current is strictly limited by external series resistance.
Is this part suitable for use in a 48 V automotive system?
Yes - the 47 V Zener voltage provides appropriate headroom for 48 V nominal systems, especially during cold-crank or load-dump conditions. Its AEC-Q101 qualification, −40°C to +150°C operating range, and 357 °C/W thermal resistance make it suitable for under-hood applications when mounted on adequate copper area.
How does the "Q" suffix affect packaging and reliability?
The "Q" denotes automotive qualification per AEC-Q101, including enhanced process controls, lot traceability, and extended reliability testing (HTOL, TC, UHAST). Packaging remains SOT23 with 3,000-unit tape-and-reel - identical form factor to standard versions but with full automotive documentation and screening.
Can this Zener replace a 5.1 V version in the same footprint?
No - while both share the SOT23 package, the BZX84C47Q-7-F is electrically incompatible with 5.1 V Zeners due to vastly different breakdown characteristics, impedance, and thermal behavior. Substitution requires full circuit revalidation, including power dissipation, regulation error, and transient response analysis.
BZX84C47Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6.38%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C47Q-7-F FAQ
1.How can I place an order for BZX84C47Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C47Q-7-F 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 BZX84C47Q-7-F reliable?
The price and inventory of BZX84C47Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C47Q-7-F is usually 5 days.
3.What payment methods are accepted for BZX84C47Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C47Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C47Q-7-F?
BZX84C47Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C47Q-7-F 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 BZX84C47Q-7-F?
For technical support, including BZX84C47Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C47Q-7-F requirements.
6.How does Aetrix verify that BZX84C47Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZX84C47Q-7-F 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 BZX84C47Q-7-F meets industry standards.
7.What is the process for return or replacement of BZX84C47Q-7-F?
All BZX84C47Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C47Q-7-F, 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 BZX84C47Q-7-F part is unused and in its original packaging.
Return procedure for BZX84C47Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C47Q-7-F 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
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
