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Diodes Incorporated BZT52C47Q-7-F
- Part No.:
- BZT52C47Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C47Q-7-F.pdf
- Description:
- DIODE ZENER 47V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
BZT52C47Q-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with a nominal zener voltage of 47 V, ±5% tolerance (44.0–50.0 V), 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C. It features SOD123 package, matte tin-plated alloy 42 leadframe, and is used for precision voltage regulation and overvoltage protection in automotive control modules.
For engineers reviewing the BZT52C47Q-7-F datasheet, BZT52C47Q-7-F pinout, BZT52C47Q-7-F application, or BZT52C47Q-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (RθJA = 338 °C/W), reverse current at VR = 35 V (≤0.1 µA), maximum zener impedance (750 Ω at 5 mA), and automotive qualification status.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD123 package supports automated assembly and meets UL 94V-0 flammability requirements.
Thermal performance is defined by RθJL = 150 °C/W and RθJA = 338 °C/W (on FR-4 with 1-inch copper pad). The device exhibits a positive temperature coefficient of +35.0 mV/°C at IZTC = 5 mA, enabling predictable drift compensation in voltage-reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal, 44.0–50.0 V range at 5 mA - defines regulated output voltage tolerance in feedback or clamp circuits |
| Power Dissipation (PD) | 370 mW at TA = +25°C - sets maximum continuous power handling on standard PCB layout |
| Zener Impedance (ZZT) | 750 Ω at 5 mA - indicates voltage regulation stability under small-signal AC variations |
| Reverse Current (IR) | ≤0.1 µA at VR = 35 V - ensures low leakage in high-impedance bias or sensing nodes |
| Temperature Coefficient | +35.0 mV/°C at IZTC = 5 mA - enables predictable voltage drift correction across -65°C to +150°C operating range |
| Package | SOD123 - 2-pin surface-mount outline with cathode band marking, 0.010 g mass, RoHS/Green compliant |
Pinout & Package
SOD123 package: 2-terminal surface-mount device with molded plastic case (UL 94V-0), cathode band marking, matte tin finish on alloy 42 leadframe, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in regulation or clamping configuration; forms reference ground path |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; maintains stable 47 V relative to anode under reverse bias ≥44 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring high-reliability stress testing |
| Planar die construction | Ensures tight VZ distribution and repeatable Zener impedance across production lots for consistent voltage reference design |
| Lead-free & Green compliance | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meeting automotive environmental standards |
| Low thermal resistance junction-to-lead | RθJL = 150 °C/W enables higher power operation when soldered to thermally enhanced pads or heatsinks |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converter (ADC) inputs monitoring throttle position and manifold pressure. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 47 V rail for precision op-amp biasing and ADC reference scaling. Use Value: Maintains ±0.5% reference accuracy over -40°C to +125°C ambient, supporting ASIL-B functional safety compliance. |
Use Scenario: Clamping transient overvoltage on 24 V industrial sensor bus lines exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Reverse-biased overvoltage protector limiting bus voltage to ≤50 V during 1 kV EFT events. Use Value: Limits peak clamped voltage within sensor IC absolute maximum rating (52 V), preventing latch-up or damage. |
| Telecom Power Supply Monitoring | Medical Diagnostic Equipment Biasing |
Use Scenario: Providing stable reference for supervisor ICs monitoring 48 V telecom rectifier outputs. IC Role / Device Role / Timing Role: Precision voltage threshold detector ensuring system reset activation only when supply drops below 44 V. Use Value: Enables accurate brown-out detection with 1.5 V hysteresis margin, avoiding false resets during line transients. |
Use Scenario: Generating calibrated bias voltage for photodiode amplifier stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference source for transimpedance amplifier offset setting. Use Value: Delivers <10 nV/√Hz noise contribution and <5 ppm/°C drift, preserving signal-to-noise ratio in µV-level signals. |
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 |
|---|---|---|---|
| MMSZ47ET1G | Zener voltage 47 V ±5%, 500 mW PD, SOD-123 package, but rated only to AEC-Q200 (not Q101); RθJA = 350 °C/W | Lacks automotive-grade reliability validation; suitable for industrial/commercial systems without AEC-Q101 mandate | Select when cost sensitivity outweighs automotive qualification requirement and thermal margin permits higher RθJA |
| BZX84-C47 | Zener voltage 47 V ±5%, 300 mW PD, SOT-23 package; no AEC-Q101 qualification; higher ZZT (1000 Ω) | Lower power rating limits use in sustained clamp applications; smaller footprint trades thermal performance for board space | Prefer for space-constrained consumer designs where 370 mW derating is acceptable and automotive qualification is unnecessary |
Compared with MMSZ47ET1G and BZX84-C47, BZT52C47Q-7-F delivers superior thermal performance (RθJA = 338 °C/W), automotive qualification (AEC-Q101), and tighter leakage control (0.1 µA at 35 V), making it optimal for safety-critical automotive voltage reference and clamp functions.
Availability
BZT52C47Q-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, telecom power supervisors, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52C47Q-7-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.
The BZT52C series is part of Diodes' AEC-Q101-qualified Zener diode portfolio, designed specifically for precision voltage regulation and transient suppression in harsh-environment automotive electronics.
FAQ
What is the maximum reverse voltage (VR) at which BZT52C47Q-7-F guarantees IR ≤ 0.1 µA?
The datasheet specifies IR ≤ 0.1 µA at VR = 35 V. This is the maximum reverse voltage at which leakage remains within that limit; operation above 35 V increases leakage exponentially and may exceed specification. For reliable clamping, ensure circuit design keeps steady-state reverse bias below 35 V unless transient energy is limited by series impedance.
Can BZT52C47Q-7-F be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. To increase power handling, use a single higher-rated Zener or implement active regulation with a transistor-based shunt circuit instead of direct parallel connection.
Is the SOD123 package of BZT52C47Q-7-F compatible with reflow profiles for lead-free soldering?
Yes - the device is fully RoHS-compliant and qualified for lead-free reflow per J-STD-020. Its moisture sensitivity level is 1, allowing unlimited floor life before reflow. Recommended peak temperature is 260°C, with time above 217°C limited to 60–150 seconds, matching standard Pb-free profile requirements.
How does the +35.0 mV/°C temperature coefficient affect voltage reference stability?
The positive coefficient means VZ increases ~35 mV per °C rise in junction temperature. At 100°C junction temperature (vs. 25°C test condition), VZ rises ~2.6 V - from 47.0 V to ~49.6 V. For high-stability references, this drift must be compensated via circuit topology (e.g., complementary Zener-temperature networks) or operating within narrow thermal margins.
BZT52C47Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6.38%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 35 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:
- SOD-123
BZT52C47Q-7-F FAQ
1.How can I place an order for BZT52C47Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C47Q-7-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 BZT52C47Q-7-F reliable?
The price and inventory of BZT52C47Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C47Q-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C47Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C47Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C47Q-7-F?
BZT52C47Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C47Q-7-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 BZT52C47Q-7-F?
For technical support, including BZT52C47Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C47Q-7-F requirements.
6.How does Aetrix verify that BZT52C47Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C47Q-7-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 BZT52C47Q-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C47Q-7-F?
All BZT52C47Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C47Q-7-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 BZT52C47Q-7-F part is unused and in its original packaging.
Return procedure for BZT52C47Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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