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Diodes Incorporated BZT52C4V7T-7
- Part No.:
- BZT52C4V7T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C4V7T-7.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:21,996
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Product details
Overview
BZT52C4V7T-7 from Diodes Incorporated is a surface-mount 4.7 V Zener diode in SOD523 package, rated for 300 mW power dissipation, 80 Ω dynamic impedance at 5 mA test current, and ±0.2 V reverse leakage at 2.0 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52C4V7T-7 datasheet, BZT52C4V7T-7 pinout, BZT52C4V7T-7 application, or BZT52C4V7T-7 equivalent, key selection criteria include zener voltage tolerance (±0.3 V), thermal resistance (417 °C/W), cathode-band polarity marking, and JEDEC-qualified reliability for industrial and consumer-grade PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 4.7 V at 5 mA test current, exhibiting a temperature coefficient of –3.5 mV/°C and maximum reverse leakage of 3.0 µA at VR = 2.0 V. Its low-profile SOD523 package enables high-density placement on space-constrained boards.
The device features a flat-lead design optimized for thermal performance on FR-4 substrates, with junction-to-ambient thermal resistance of 417 °C/W under standard mounting conditions and a moisture sensitivity level of 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.4–5.0 V range at 5 mA - defines stable clamping/reference point in low-current bias networks |
| Power Dissipation (PD) | 300 mW - limits continuous reverse-bias energy handling without derating on standard 2 oz copper pads |
| Zener Impedance (ZZT) | 80 Ω at 1 kHz, 5 mA - determines voltage regulation stability under small-signal load variations |
| Reverse Leakage (IR) | 3.0 µA max at VR = 2.0 V - ensures minimal parasitic current draw in standby or high-impedance sensing nodes |
| Thermal Resistance (RθJA) | 417 °C/W - quantifies self-heating impact on voltage drift during sustained operation |
| Operating Temperature | –55 to +150 °C - supports deployment in extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
Package: SOD523 - ultra-compact surface-mount plastic package (1.25 mm × 0.85 mm footprint) with cathode band marking on top surface; terminals are matte tin annealed over Alloy 42 leadframe, solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage clamp output | Marked by visible band; delivers regulated 4.7 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD523 package | Enables <0.8 mm height clearance and >1000 pcs/in² board density for portable and wearable designs |
| JEDEC-qualified reliability | Meets AEC-Q200 stress requirements for high-reliability industrial use without automotive qualification overhead |
| Halogen- and antimony-free "Green" compound | Complies with RoHS 3 (2015/863/EU); Br+Cl <1500 ppm, Sb <1000 ppm - supports eco-compliant manufacturing |
| Cathode band polarity marking | Ensures unambiguous orientation during automated placement and visual inspection on fine-pitch PCBs |
Applications
| USB Port ESD Protection Clamp | Microcontroller Reset Circuit Reference |
|---|---|
Use Scenario: Clamping transient voltages on USB D+/D− lines during hot-plug events or ESD strikes. IC Role / Device Role / Timing Role: Zener diode acts as bidirectional shunt clamp, limiting line voltage to ≤5.0 V while sinking surge current. Use Value: Leverages 4.7 V nominal zener voltage and 300 mW PD to absorb IEC 61000-4-2 Level 4 (15 kV air) surges without latch-up or parametric shift. |
Use Scenario: Providing stable reset threshold for 3.3 V microcontrollers with brown-out detection. IC Role / Device Role / Timing Role: Functions as precision voltage reference in RC-based reset timing network. Use Value: Tight 4.4–5.0 V zener range and low 3.0 µA IR at 2 V ensure predictable reset assertion across –40 to +85 °C ambient. |
| Industrial Sensor Signal Conditioning | Low-Power Battery Monitoring Divider |
Use Scenario: Biasing op-amp input stages in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Supplies stable 4.7 V reference for current-loop DAC calibration and offset trimming. Use Value: 80 Ω ZZT and –3.5 mV/°C TC enable <±10 mV drift over 0–70 °C, meeting Class A sensor accuracy. |
Use Scenario: Scaling lithium-ion battery voltage (2.5–4.2 V) into ADC input range of ultra-low-power IoT node. IC Role / Device Role / Timing Role: Forms upper leg of resistive divider with known ratio, referenced to 4.7 V zener instead of supply rail. Use Value: Low 3.0 µA IR minimizes divider current error; SOD523 footprint saves space in coin-cell–powered designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BS-7-F | Same 4.7 V nominal, but 200 mW PD and 100 Ω ZZT at 20 mA; SOT-323 package (larger footprint) | Higher power rating unsuitable for ultra-dense layouts; requires larger pad area and higher thermal mass | Select when board layout allows SOT-323 and higher surge current handling is needed |
| BZX84-C4V7 | 4.7 V nominal, 350 mW PD, 90 Ω ZZT at 5 mA; SOT-23 package with different pinout (cathode on pin 3) | SOT-23 requires rework of pick-and-place program and stencil; not drop-in compatible with SOD523 land pattern | Choose only if existing SOT-23 infrastructure exists and thermal margin >300 mW is required |
Compared with MMBZ5225BS-7-F and BZX84-C4V7, BZT52C4V7T-7 offers optimal balance of ultra-small SOD523 footprint, 300 mW capability, and tight 4.4–5.0 V tolerance-making it preferred for space-constrained, low-leakage, and thermally managed designs where SOT-23/SOT-323 real estate is prohibitive.
Availability
BZT52C4V7T-7 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset circuits, industrial sensor signal conditioning, and low-power battery monitoring requiring stable component supply and JEDEC-qualified reliability.
Supply support for BZT52C4V7T-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 the Americas.
The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in cost-sensitive, high-volume consumer and industrial applications.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C4V7T-7?
The BZT52C4V7T-7 exhibits a nominal zener voltage of 4.7 V at 5 mA test current, with guaranteed breakdown occurring between 4.4 V and 5.0 V. Below 4.4 V, reverse leakage remains ≤3.0 µA at 2.0 V; no hard "maximum reverse voltage" is specified outside this range since operation is defined within the zener region.
Can BZT52C4V7T-7 be used in automotive applications?
BZT52C4V7T-7 is not AEC-Q200 qualified; Diodes offers automotive-grade variants with Q-suffix (e.g., BZT52C4V7TQ-7-F) manufactured in IATF 16949 facilities and PPAP-capable. This part meets JEDEC reliability standards but lacks automotive change control and qualification documentation.
How does the SOD523 package affect thermal performance?
In the SOD523 package, BZT52C4V7T-7 achieves 417 °C/W junction-to-ambient thermal resistance when mounted on a standard FR-4 board with 2 oz copper and 1.92 mm² pad area. This limits continuous power dissipation to 300 mW at 25 °C ambient; derating is required above 25 °C per the published power derating curve.
Is the cathode band orientation standardized for SOD523?
Yes-the cathode band on BZT52C4V7T-7 is located on the top surface adjacent to the cathode terminal, consistent with JEDEC MO-213AA and Diodes' SOD523 package outline. The anode is the unmarked end; polarity must be verified using optical inspection or continuity testing prior to reflow.
BZT52C4V7T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SOD-523
BZT52C4V7T-7 FAQ
1.How can I place an order for BZT52C4V7T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C4V7T-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 BZT52C4V7T-7 reliable?
The price and inventory of BZT52C4V7T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C4V7T-7 is usually 5 days.
3.What payment methods are accepted for BZT52C4V7T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C4V7T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C4V7T-7?
BZT52C4V7T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C4V7T-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 BZT52C4V7T-7?
For technical support, including BZT52C4V7T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C4V7T-7 requirements.
6.How does Aetrix verify that BZT52C4V7T-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C4V7T-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 BZT52C4V7T-7 meets industry standards.
7.What is the process for return or replacement of BZT52C4V7T-7?
All BZT52C4V7T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C4V7T-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 BZT52C4V7T-7 part is unused and in its original packaging.
Return procedure for BZT52C4V7T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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