My Inquiry
My Account
Diodes Incorporated BZT52C3V9-7
- Part No.:
- BZT52C3V9-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C3V9-7.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,207
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52C3V9-7 from Diodes Incorporated is a surface-mount 3.9 V Zener diode in SOD123 package, rated for 500 mW peak power dissipation at TL = +75°C and 370 mW at TA = +25°C, with 90 Ω maximum Zener impedance at 5 mA test current and ±3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the BZT52C3V9-7 datasheet, BZT52C3V9-7 pinout, BZT52C3V9-7 application, or BZT52C3V9-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5.1%), reverse leakage (≤3.0 µA at 1.0 V), thermal resistance (RθJA = 338 °C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and supply fluctuations. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (ZZT ≤ 90 Ω) at IZT = 5 mA, supporting accurate regulation in feedback paths of LDOs and voltage monitors.
The device features a cathode band polarity marker and matte tin-plated alloy 42 leadframe for reliable solderability. With moisture sensitivity level 1 per J-STD-020 and UL 94V-0 flammability rating, it supports high-yield automated assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, 3.7–4.1 V range at 5 mA - defines regulated output voltage in shunt regulator circuits |
| Power Dissipation (PD) | 370 mW at +25°C ambient - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | ≤90 Ω at 5 mA - determines regulation accuracy under varying load current |
| Reverse Leakage (IR) | ≤3.0 µA at VR = 1.0 V - ensures minimal quiescent current in standby-mode protection circuits |
| Temperature Coefficient | −3.5 to 0 mV/°C - quantifies voltage drift over −65°C to +150°C operating range |
| Package | SOD123 - 2-pin surface-mount outline with 2.65 mm body width and 3.65 mm length for compact board layout |
Pinout & Package
Package: SOD123 - molded plastic case with cathode band marking; terminals are anode and cathode; weight ≈ 0.010 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lowest potential point in shunt regulation topology |
| Cathode | Reverse-biased Zener terminal / regulated voltage output node | Connected to input rail or feedback node; voltage clamped to 3.9 V when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Lead-free & RoHS compliant | Fully compliant with EU Directive 2011/65/EU; no intentionally added lead or halogens |
| Low Zener impedance | 90 Ω max at 5 mA enables tight voltage regulation in precision analog signal chains |
| Moisture Sensitivity Level 1 | No bake requirement before reflow; compatible with standard SMT assembly lines |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Power Monitoring |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC inputs in temperature/humidity sensors. IC Role / Device Role / Timing Role: Shunt voltage reference providing 3.9 V bias to op-amp buffer stage. Use Value: Maintains <±1% reference stability over −40°C to +85°C ambient, enabling sub-0.5% total measurement error. |
Use Scenario: Overvoltage clamp on 5 V microcontroller supply rail during load dump transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursion to ≤4.1 V. Use Value: Responds within nanoseconds to clamp spikes >5 V while drawing <1 µA at nominal 5 V operation. |
| USB-C Port Protection Circuit | Medical Wearable Low-Power Biasing |
Use Scenario: ESD and overvoltage protection on USB-C CC line interface. IC Role / Device Role / Timing Role: Bidirectional clamping diode referenced to 3.3 V logic rail. Use Value: Limits CC line voltage to 3.9 V ±0.2 V during 8 kV HBM ESD events without latch-up. |
Use Scenario: Generating stable 3.9 V bias for ultra-low-power biosignal amplifier front-end. IC Role / Device Role / Timing Role: Passive voltage reference in zero-bias instrumentation amplifier configuration. Use Value: Draws only 3 µA reverse leakage at 1 V reverse bias, extending battery life in multi-year wearable deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F | Zener voltage 3.6 V (3.4–3.8 V), 200 mW PD, SOT-323 package | Lower power rating and smaller footprint; less thermal margin in sustained clamp duty | Select when board space is constrained and peak power <200 mW |
| BZX384-C3V9,115 | Zener voltage 3.9 V (3.7–4.1 V), 300 mW PD, SOD-323 package | Higher RθJA (450 °C/W); requires tighter thermal layout for same power | Select when existing design uses SOD-323 footprint and derating to 300 mW is acceptable |
Compared with MMBZ5227BS-7-F and BZX384-C3V9,115, BZT52C3V9-7 offers superior thermal performance (338 °C/W vs. ≥450 °C/W), higher power headroom (370 mW vs. ≤300 mW), and AEC-Q101 qualification - making it preferred for automotive and industrial environments requiring long-term reliability under thermal stress.
Availability
BZT52C3V9-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, USB-C port protection, and medical wearable biasing requiring stable component supply across production lifecycles.
Supply support for BZT52C3V9-7 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 BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation and transient suppression in commercial and automotive applications.
FAQ
What is the maximum reverse voltage (VR) this diode can withstand before breakdown?
The BZT52C3V9-7 has a nominal Zener voltage of 3.9 V with a tolerance of ±5.1%, meaning breakdown occurs between 3.7 V and 4.1 V at 5 mA test current. It is not rated for sustained reverse voltage above 4.1 V; operation beyond this range risks thermal runaway if power dissipation exceeds 370 mW at +25°C ambient.
Is this part suitable for use in automotive applications?
Yes - BZT52C3V9-7 is qualified to AEC-Q101 standards, confirming its suitability for automotive applications such as body control modules, infotainment power rails, and sensor signal conditioning where extended temperature operation (−65°C to +150°C) and high reliability are required.
How does the SOD123 package compare to SOD-323 in terms of thermal performance?
The SOD123 package delivers RθJA = 338 °C/W on FR-4 PCB with 1-inch copper pad, significantly better than typical SOD-323 devices (≥450 °C/W). This allows BZT52C3V9-7 to dissipate 370 mW at +25°C ambient versus ~250 mW for comparable SOD-323 Zeners under identical layout conditions.
Can this Zener diode be used in series or parallel configurations?
Series connection is permissible for higher voltage references but requires matched units to avoid current imbalance; parallel use is strongly discouraged due to negative temperature coefficient mismatch, which causes thermal runaway and premature failure. Diodes Incorporated recommends single-device implementation per regulation node.
BZT52C3V9-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 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:
- SOD-123
BZT52C3V9-7 FAQ
1.How can I place an order for BZT52C3V9-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C3V9-7 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 BZT52C3V9-7 reliable?
The price and inventory of BZT52C3V9-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C3V9-7 is usually 5 days.
3.What payment methods are accepted for BZT52C3V9-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C3V9-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C3V9-7?
BZT52C3V9-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C3V9-7 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 BZT52C3V9-7?
For technical support, including BZT52C3V9-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C3V9-7 requirements.
6.How does Aetrix verify that BZT52C3V9-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C3V9-7 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 BZT52C3V9-7 meets industry standards.
7.What is the process for return or replacement of BZT52C3V9-7?
All BZT52C3V9-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C3V9-7, 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 BZT52C3V9-7 part is unused and in its original packaging.
Return procedure for BZT52C3V9-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52C3V9-7 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…
