My Inquiry
My Account
Diodes Incorporated BZX84C3V3-7
- Part No.:
- BZX84C3V3-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C3V3-7.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,960
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84C3V3-7 from Diodes Incorporated is a 3.3 V, 5 mA nominal Zener voltage regulator diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 95 Ω maximum Zener impedance at test current and ±0.5 V tolerance band (3.1–3.5 V), used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the BZX84C3V3-7 datasheet, BZX84C3V3-7 pinout, BZX84C3V3-7 application, or BZX84C3V3-7 equivalent, key selection criteria include Zener voltage accuracy at 5 mA, thermal resistance (357 °C/W), reverse leakage (<5.0 µA at 1.0 V), temperature coefficient (−3.5 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load circuits under varying current conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (95 Ω @ 5 mA).
Designed for surface-mount automated assembly, it features matte tin-plated Alloy 42 leads, UL 94V-0 molded plastic case, and moisture sensitivity level 1 - enabling reflow compatibility without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.1–3.5 V range at 5 mA - defines regulation setpoint for low-voltage biasing |
| Power Dissipation (PD) | 350 mW at TA = 25°C - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 95 Ω max @ 5 mA - determines output voltage stability under load current variation |
| Reverse Leakage (IR) | 5.0 µA max @ 1.0 V - limits standby current in voltage-sense or clamping paths |
| Temperature Coefficient | −3.5 mV/°C - quantifies voltage drift with ambient temperature change |
| Thermal Resistance (RθJA) | 357 °C/W - defines junction-to-ambient temperature rise per watt dissipated |
Pinout & Package
Package: SOT23 - 3-terminal surface-mount plastic package with 0.915 mm lead pitch, 2.40 mm body length, and 1.30 mm width; compliant with JEDEC TO-236AB outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode (Pin 2) | Zener breakdown terminal / voltage regulation node | Provides stable 3.3 V reference when reverse-biased above breakdown threshold |
| Collector / Heat Sink (Pin 3) | Common emitter / thermal path | Shared with cathode in SOT23 diode layout; serves as primary heat conduction path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight Zener voltage distribution (±0.2 V) and repeatable breakdown behavior across production lots |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics requiring high-reliability discrete components |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports green manufacturing requirements |
| Moisture Sensitivity Level 1 | No bake required prior to reflow; compatible with standard J-STD-020 profile for high-yield SMT assembly |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Control Panel |
|---|---|
Use Scenario: Stabilizing reference voltage for 3.3 V ADC input stages in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed bias point for op-amp buffer and ADC reference divider network. Use Value: Maintains ±1% reference accuracy over −40°C to +85°C due to predictable −3.5 mV/°C TC and low 95 Ω dynamic impedance. |
Use Scenario: Overvoltage clamp protecting microcontroller I/O pins from load-dump transients in HVAC control modules. IC Role / Device Role / Timing Role: Reverse-biased transient suppressor limiting voltage excursions to ≤3.5 V during 12 V system surges. Use Value: Limits peak clamping voltage to 3.5 V while dissipating up to 350 mW - sufficient for short-duration 100 ms pulses per ISO 7637-2. |
| USB-C Power Negotiation Circuitry | Medical Wearable Battery Monitor |
Use Scenario: Providing precise 3.3 V reference for CC line voltage detection in USB PD sink implementations. IC Role / Device Role / Timing Role: Low-current Zener reference enabling accurate CC pin state interpretation during PD communication handshake. Use Value: Delivers stable 3.3 V with <5 µA leakage at 1 V - avoids false detection during idle states and minimizes quiescent current draw. |
Use Scenario: Regulating bias voltage for fuel gauge IC and low-power analog front-end in rechargeable Li-ion wearable monitors. IC Role / Device Role / Timing Role: Low-power voltage shunt regulator maintaining 3.3 V supply rail integrity during battery voltage sag. Use Value: Operates reliably down to 2.8 V input with <10 µA total system overhead - extends usable battery life in compact form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | Zener voltage 3.3 V, but 200 mW rating and 150 Ω ZZT - higher impedance and lower power headroom | Suitable for ultra-low-power logic-level clamping only; not recommended for sustained 5 mA regulation loads | Select when board space allows larger footprint (SOT323) and thermal budget is constrained below 250 mW |
| BZX84-C3V3,115 | Identical electrical specs but Nexperia packaging (SOT23, 10,000/reel); no AEC-Q101 qualification | Lacks automotive reliability validation - limited to commercial-grade consumer or industrial applications | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated and tape-and-reel volume matches 10k units |
Compared with MMBZ5226BS-7-F and BZX84-C3V3,115, the BZX84C3V3-7 delivers superior thermal robustness (350 mW vs. 200 mW), tighter impedance control (95 Ω vs. 150 Ω), and automotive-grade qualification - making it the preferred choice for safety-critical or thermally demanding voltage reference roles.
Availability
BZX84C3V3-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control panels, and USB-C power negotiation circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84C3V3-7 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in space-constrained, high-reliability applications including automotive electronics and industrial automation.
FAQ
What is the maximum reverse current specification for BZX84C3V3-7 at 1.0 V?
The maximum reverse current (IR) is 5.0 µA at VR = 1.0 V, measured at 25°C ambient. This low leakage ensures minimal parasitic loading in high-impedance reference networks and preserves accuracy in battery-powered systems where standby current must remain below 10 µA.
Is BZX84C3V3-7 qualified for automotive use?
Yes - BZX84C3V3-7 is fully qualified to AEC-Q101 standards for high-reliability automotive applications. It undergoes stress testing including HTGB, HTRB, and temperature cycling to ensure performance stability across −40°C to +150°C junction temperature range in engine control, body electronics, and infotainment subsystems.
How does the −3.5 mV/°C temperature coefficient affect circuit design?
The negative temperature coefficient means the Zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. For applications requiring stable reference over wide temperature ranges, designers must account for this drift - e.g., using compensation resistors or selecting complementary TC components in voltage-divider configurations.
Can BZX84C3V3-7 be used in place of a 3.3 V LDO regulator?
No - it functions only as a shunt regulator and cannot source current like an LDO. It requires a series current-limiting resistor and is suitable only for low-current (<5 mA) reference or clamping tasks. For active regulation delivering >1 mA load current, a dedicated LDO such as AP2112K-3.3 or MCP1700-3302E is required.
BZX84C3V3-7 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C3V3-7 FAQ
1.How can I place an order for BZX84C3V3-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C3V3-7 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 BZX84C3V3-7 reliable?
The price and inventory of BZX84C3V3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C3V3-7 is usually 5 days.
3.What payment methods are accepted for BZX84C3V3-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C3V3-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C3V3-7?
BZX84C3V3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C3V3-7 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 BZX84C3V3-7?
For technical support, including BZX84C3V3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C3V3-7 requirements.
6.How does Aetrix verify that BZX84C3V3-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C3V3-7 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 BZX84C3V3-7 meets industry standards.
7.What is the process for return or replacement of BZX84C3V3-7?
All BZX84C3V3-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C3V3-7, 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 BZX84C3V3-7 part is unused and in its original packaging.
Return procedure for BZX84C3V3-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C3V3-7 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…
