My Inquiry
My Account
Diodes Incorporated BZX84C43Q-13-F
- Part No.:
- BZX84C43Q-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C43Q-13-F.pdf
- Description:
- DIODE ZENER 43V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,153
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C43Q-13-F from Diodes Incorporated is a 43 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 2 mA test current and 150 Ω maximum Zener impedance at 1 kHz, with ±5% voltage tolerance (40–46 V), designed for precision voltage regulation and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZX84C43Q-13-F datasheet, BZX84C43Q-13-F pinout, BZX84C43Q-13-F application, or BZX84C43Q-13-F equivalent, key selection criteria include Zener voltage accuracy at 2 mA, thermal resistance of 357 °C/W, AEC-Q101 qualification, green molding compound compliance, and SOT23 terminal layout compatibility with high-volume automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent Zener characteristics, while the matte tin-plated Alloy 42 leadframe supports reliable solderability per MIL-STD-202.
The device exhibits a negative temperature coefficient of −3.5 mV/°C near 43 V, enabling predictable drift compensation in bias networks. It is rated for operation from −65 °C to +150 °C and features 0.1 µA maximum reverse leakage at 37.6 V, supporting low-power standby regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal, 40–46 V range at IZT = 2 mA - defines regulated output level with ±5% tolerance for supply rail clamping. |
| Power Dissipation | 350 mW at ambient temperature - sets maximum continuous power handling without forced cooling or derating. |
| Zener Impedance (ZZT) | 150 Ω max at 1 kHz, 2 mA - determines AC regulation stiffness and ripple rejection capability in feedback paths. |
| Reverse Leakage (IR) | 0.1 µA max at VR = 37.6 V - ensures minimal quiescent current draw in battery-powered voltage monitor circuits. |
| Thermal Resistance (RθJA) | 357 °C/W - quantifies junction-to-ambient heat transfer efficiency on standard FR-4 PCB with recommended pad layout. |
| Temperature Coefficient | −3.5 mV/°C - enables predictable voltage drift correction across industrial temperature range (−40 to +125 °C). |
Pinout & Package
Package: SOT23 - 3-terminal surface-mount plastic case, UL 94V-0 rated, 0.008 g weight, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to system ground or lower-potential node when used in shunt regulation configuration. |
| Cathode (Pin 2) | Zener breakdown terminal / voltage reference output | Provides stabilized 43 V reference point; connected to input rail via series resistor for current limiting. |
| Collector / NC (Pin 3) | Internal die attachment / mechanical support | Electrically isolated internal tie; not connected to active semiconductor region - must remain unconnected in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for under-hood ECUs. |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets RoHS 3 and automotive environmental compliance requirements. |
| Planar die construction | Enables tight Zener voltage distribution and repeatable breakdown characteristics across production lots - critical for batch-sensitive designs. |
| SOT23 tape-and-reel packaging | 10,000 units per reel (13-F suffix) - optimized for high-speed pick-and-place placement and traceable lot control in Tier-1 manufacturing. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 5 V microcontroller supply rail fed from 12 V battery with transient suppression. IC Role / Device Role: Shunt voltage regulator and overvoltage clamp protecting MCU VDD pin during load dump events. Use Value: Maintains 43 V clamping threshold to prevent >37.6 V transients from exceeding downstream IC absolute maximum ratings. |
Use Scenario: Providing stable reference voltage for 16-bit ADC in pressure transducer front-end. IC Role / Device Role: Precision Zener reference source for ratiometric measurement calibration. Use Value: Delivers 43 V reference with <0.1 µA leakage, minimizing offset error contribution in low-current analog signal chains. |
| Telecom Power Sequencing | Medical Diagnostic Equipment Biasing |
Use Scenario: Enabling controlled power-up sequence between FPGA core and I/O banks using discrete voltage monitors. IC Role / Device Role: Threshold detection element in comparator-based power-good circuit. Use Value: Provides sharp 43 V breakdown knee with 150 Ω ZZT, ensuring clean logic-level transitions during brown-out recovery. |
Use Scenario: Generating stable bias voltage for photodiode amplifier in portable ultrasound probe. IC Role / Device Role: Low-noise DC reference for op-amp offset nulling network. Use Value: Achieves <1 µV/°C effective drift via matched −3.5 mV/°C TC and low thermal resistance, preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ43VCW-7-F | Same 43 V nominal Zener voltage, but 200 mW rating and 250 Ω ZZT; SOD-323 package (smaller footprint, higher RθJA). | Limited to lower-power applications due to reduced dissipation; unsuitable for sustained 2 mA regulation in thermally constrained layouts. | Select only if board space is critical and peak power remains below 150 mW with adequate airflow. |
| BZX84-C43,115 | Identical electrical specs but non-automotive grade (no AEC-Q101); same SOT23 package and 10,000/reel packaging (115 suffix). | Not qualified for automotive use; may lack green compound or extended temperature validation required for Tier-1 programs. | Acceptable for industrial or consumer applications where AEC-Q101 and halogen-free status are not mandated. |
Compared with MMBZ43VCW-7-F and BZX84-C43,115, BZX84C43Q-13-F uniquely combines AEC-Q101 qualification, 350 mW power handling, and green compound compliance - making it the sole choice for automotive power rail protection where reliability, thermal margin, and environmental compliance are jointly required.
Availability
BZX84C43Q-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, telecom power sequencing circuits, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZX84C43Q-13-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.
BZX84C43Q-13-F belongs to the BZX84C series of automotive-qualified Zener diodes, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener test current for BZX84C43Q-13-F?
The specified Zener test current is 2 mA, as defined in the Electrical Characteristics Table for all BZX84C43 variants. This current establishes the 43 V nominal voltage point and is used to measure Zener impedance (ZZT = 150 Ω max) and leakage (IR = 0.1 µA max at 37.6 V).
Is BZX84C43Q-13-F suitable for use in high-temperature environments?
Yes - it is rated for operation from −65 °C to +150 °C and qualified to AEC-Q101, including high-temperature reverse bias (HTRB) testing. Its −3.5 mV/°C temperature coefficient allows predictable voltage drift modeling up to 125 °C ambient in automotive under-hood applications.
How does the "Q" suffix affect the BZX84C43Q-13-F specification?
The "Q" denotes automotive qualification per AEC-Q101 standards, including enhanced reliability testing (e.g., temperature cycling, HTGB, ESD). It also indicates green (halogen/antimony-free) molding compound, verified for date codes V9 (week 33, 2008) and newer - confirmed for this part number.
Can BZX84C43Q-13-F replace BZX84C43-13-F in existing designs?
Yes - the "Q" variant shares identical electrical specifications, SOT23 package, and pinout with the standard BZX84C43-13-F, but adds AEC-Q101 qualification and green compound. No layout or schematic changes are needed; it is a drop-in upgrade for automotive or environmentally regulated applications.
BZX84C43Q-13-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):
- 43 V
- Tolerance:
- ±6.98%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 30.1 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
BZX84C43Q-13-F FAQ
1.How can I place an order for BZX84C43Q-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C43Q-13-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 BZX84C43Q-13-F reliable?
The price and inventory of BZX84C43Q-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C43Q-13-F is usually 5 days.
3.What payment methods are accepted for BZX84C43Q-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C43Q-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C43Q-13-F?
BZX84C43Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C43Q-13-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 BZX84C43Q-13-F?
For technical support, including BZX84C43Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C43Q-13-F requirements.
6.How does Aetrix verify that BZX84C43Q-13-F is sourced from the original manufacturer or authorized distributors?
All BZX84C43Q-13-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 BZX84C43Q-13-F meets industry standards.
7.What is the process for return or replacement of BZX84C43Q-13-F?
All BZX84C43Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C43Q-13-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 BZX84C43Q-13-F part is unused and in its original packaging.
Return procedure for BZX84C43Q-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C43Q-13-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…
