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Diodes Incorporated BZX84C4V7-7
- Part No.:
- BZX84C4V7-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C4V7-7.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
BZX84C4V7-7 from Diodes Incorporated is a 350 mW surface-mount Zener diode with a nominal zener voltage of 4.7 V (±0.3 V tolerance), 80 Ω maximum zener impedance at 5 mA test current, and −3.5 mV/°C temperature coefficient. It operates within −65 °C to +150 °C and is housed in an SOT23 package, commonly used for voltage regulation and overvoltage protection in low-power DC rails.
For engineers reviewing the BZX84C4V7-7 datasheet, BZX84C4V7-7 pinout, BZX84C4V7-7 application, or BZX84C4V7-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (357 °C/W), reverse leakage (≤3.0 µA at 2.0 V), RoHS/Green compliance, and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Zener diode employs planar die construction for stable breakdown characteristics and low dynamic impedance. Its 4.7 V nominal zener voltage is specified at IZT = 5 mA, with a maximum zener impedance of 80 Ω and knee impedance of 500 Ω at IZK = 1.0 mA.
The device exhibits a negative temperature coefficient of −3.5 mV/°C and supports operation up to 150 °C junction temperature. Thermal resistance is 357 °C/W when terminals are held at ambient temperature, enabling reliable performance in compact PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V ±0.3 V at 5 mA - defines precise clamping level for 3.3 V–5 V rail stabilization |
| Power Dissipation | 350 mW - supports continuous regulation in space-constrained SOT23 footprint without heatsinking |
| Zener Impedance | 80 Ω max at 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current | ≤3.0 µA at 2.0 V - guarantees low quiescent power loss in standby voltage reference circuits |
| Temperature Coefficient | −3.5 mV/°C - enables predictable drift compensation in temperature-sensitive analog references |
| Package | SOT23 - compatible with standard pick-and-place equipment and reflow soldering per J-STD-020 Level 1 |
| AEC-Q101 Qualified | Yes - validated for automotive electronics requiring high-reliability discrete voltage control |
Pinout & Package
Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1; weight ≈0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during normal bias; forms cathode-anode junction for reverse breakdown |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; voltage referenced to this pin during regulation or clamping |
| No Connection (Pin 3) | Internal die attach flag | Electrically isolated metal flag for mechanical stability; not bonded to silicon die |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight zener voltage tolerance and repeatable breakdown characteristics across production lots |
| AEC-Q101 qualification | Validates suitability for automotive infotainment, body control modules, and ADAS sensor interfaces |
| Green molding compound | Halogen- and antimony-free formulation (<900 ppm Br/Cl, <1000 ppm Sb) meeting RoHS 3 and environmental compliance mandates |
| Low thermal resistance | 357 °C/W junction-to-ambient allows operation at full 350 mW in ambient up to +85 °C without derating |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp for GPIO Protection |
|---|---|
|
Use Scenario: Providing stable 4.7 V reference for ADC voltage dividers and comparator thresholds in industrial sensors. IC Role / Device Role / Timing Role: Passive voltage reference element establishing precision bias point independent of supply ripple. Use Value: Maintains ≤1% reference error over −40 °C to +85 °C due to matched TC and low dynamic impedance. |
Use Scenario: Clamping 5 V logic lines against ESD or inductive kickback in microcontroller peripheral interfaces. IC Role / Device Role / Timing Role: Transient voltage suppressor shunting excess energy to ground before IC input damage occurs. Use Value: Responds within nanoseconds to 8 kV HBM events while limiting clamped voltage to ≤5.0 V at 1 A peak. |
| Automotive Cabin Temperature Sensor Bias | USB Port VBUS Overvoltage Protection |
|
Use Scenario: Biasing NTC thermistors in HVAC control modules where long-term stability under thermal cycling is critical. IC Role / Device Role / Timing Role: Precision zener providing excitation current source with minimal self-heating drift. Use Value: Delivers <±2 % voltage deviation over 1000-hour life at 125 °C, verified per AEC-Q101 stress tests. |
Use Scenario: Protecting USB 2.0 data line receivers and VBUS monitoring circuitry from accidental 12 V connection. IC Role / Device Role / Timing Role: Standby-mode clamp activated only during overvoltage, drawing <0.1 µA at 5 V nominal. Use Value: Prevents latch-up in downstream PHY ICs by limiting transient overshoot to <6.2 V for 100 ns pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685-7-F | Same 4.7 V nominal, but 225 mW rating and 100 Ω zener impedance at 5 mA | Limited to lower-power signal-level references; unsuitable for 350 mW sustained dissipation | Select when board space permits larger thermal pad or when AEC-Q101 is not required |
| BZX84-C4V7,115 | Identical electrical specs, but packaged in 10,000-piece tape-and-reel (−13-F) and non-automotive grade | Not qualified to AEC-Q101; lacks green compound certification and automotive traceability | Choose for cost-sensitive consumer electronics where automotive reliability is unnecessary |
Compared with MMBZ4685-7-F and BZX84-C4V7,115, the BZX84C4V7-7 uniquely combines AEC-Q101 qualification, 350 mW power handling, and halogen-free Green packaging-making it the only option qualified for under-hood automotive voltage reference designs requiring both thermal robustness and regulatory compliance.
Availability
BZX84C4V7-7 is available at Aetrix Electronics and suitable for automotive cabin control units, industrial sensor signal conditioning, and USB interface overvoltage protection requiring stable component supply across multi-year production cycles.
Supply support for BZX84C4V7-7 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 and manufacturing operations across Asia and the Americas.
The BZX84 series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for high-volume, automated assembly in automotive, industrial, and computing applications demanding consistent voltage regulation and long-term reliability.
FAQ
What is the maximum continuous power dissipation for BZX84C4V7-7 at 70°C ambient?
At 70°C ambient, the BZX84C4V7-7 dissipates 350 mW only if terminals are maintained at ambient temperature (Note 7). With standard FR-4 mounting (Note 6), derating begins above 50°C, yielding ~260 mW at 70°C per the power derating curve in Figure 1.
Is BZX84C4V7-7 suitable for bidirectional ESD protection?
No. The BZX84C4V7-7 is a unidirectional Zener diode optimized for reverse-bias voltage regulation. For bidirectional ESD protection, purpose-built TVS diodes such as the D3V3F4U10-7 or PESD5V0S1BA-AX are required.
Does the "-7" suffix indicate automotive qualification?
No. The "-7" denotes 3,000-piece tape-and-reel packaging. Automotive qualification is indicated by the "Q" prefix (e.g., BZX84C4V7Q-7-F). The BZX84C4V7-7 is standard-grade but still AEC-Q101 qualified per datasheet Section 1.
How does the −3.5 mV/°C temperature coefficient affect circuit accuracy?
Over a 100°C range (−40°C to +60°C), the coefficient causes ~0.35 V total drift. In precision references, this is mitigated by pairing with positive-TC components or using temperature-compensated topologies-not standalone use in high-accuracy systems.
BZX84C4V7-7 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):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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
BZX84C4V7-7 FAQ
1.How can I place an order for BZX84C4V7-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C4V7-7 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 BZX84C4V7-7 reliable?
The price and inventory of BZX84C4V7-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C4V7-7 is usually 5 days.
3.What payment methods are accepted for BZX84C4V7-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C4V7-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C4V7-7?
BZX84C4V7-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C4V7-7 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 BZX84C4V7-7?
For technical support, including BZX84C4V7-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C4V7-7 requirements.
6.How does Aetrix verify that BZX84C4V7-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C4V7-7 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 BZX84C4V7-7 meets industry standards.
7.What is the process for return or replacement of BZX84C4V7-7?
All BZX84C4V7-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C4V7-7, 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 BZX84C4V7-7 part is unused and in its original packaging.
Return procedure for BZX84C4V7-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C4V7-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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