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Diodes Incorporated BZT52C27Q-7-F
- Part No.:
- BZT52C27Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C27Q-7-F.pdf
- Description:
- DIODE ZENER 27V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,468
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Product details
Overview
BZT52C27Q-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with a nominal zener voltage of 27 V, 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C, used for precision voltage regulation and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZT52C27Q-7-F datasheet, BZT52C27Q-7-F pinout, BZT52C27Q-7-F application, or BZT52C27Q-7-F equivalent, key selection criteria include zener voltage tolerance (±3.3% at 2 mA), low dynamic impedance (80 Ω at 2 mA), temperature coefficient (+0.094 %/°C), and SOD123 automotive-grade packaging with matte tin plating.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent parametric performance across production lots, and its AEC-Q101 qualification confirms suitability for automotive environments with operating junction temperatures from –65°C to +150°C.
The device exhibits a typical zener impedance of 80 Ω at 2 mA test current and 300 Ω at knee current (0.5 mA), enabling reliable clamping in low-current bias networks. Its thermal resistance junction-to-lead is 150 °C/W, supporting efficient heat transfer in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, 25.1–28.9 V range at 2 mA - defines precise clamping threshold for 24 V system protection |
| Power Dissipation | 370 mW at +25°C ambient - sets maximum continuous power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 80 Ω at IZT = 2 mA - determines regulation accuracy under small-signal load variations |
| Reverse Current (IR) | 0.1 µA at VR = 21.4 V - ensures minimal leakage in high-impedance bias networks |
| Temperature Coefficient | +0.094 %/°C - quantifies voltage drift per degree Celsius rise, critical for wide-temperature operation |
| Package | SOD123 - surface-mount outline with 2.65 mm width, 1.55 mm length, and cathode band polarity marking |
Pinout & Package
Package: SOD123 molded plastic case, UL 94V-0 rated, 0.010 g weight, matte tin-plated alloy 42 leadframe, cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reverse-biased reference node | Connected to lower-potential side of regulated node; forms cathode-referenced clamp path |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to higher-potential rail; provides stable 27 V reference when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| Planar die construction | Ensures tight parameter distribution and long-term stability under thermal cycling |
| Lead-free & halogen-free | Complies with RoHS 2 (2011/65/EU) and Diodes Inc.'s "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture sensitivity Level 1 | Enables direct placement without baking, reducing manufacturing overhead |
Applications
| Automotive Power Rail Protection | Industrial Sensor Reference |
|---|---|
Use Scenario: Clamping transients on 24 V battery-supplied ECUs during load dump events. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp. Use Value: Maintains rail integrity below 30 V using 27 V breakdown with ±3.3% tolerance and 80 Ω dynamic impedance. |
Use Scenario: Providing stable 27 V reference for analog front-end amplifiers in pressure sensors. IC Role / Device Role / Timing Role: Precision voltage reference source in ratiometric measurement circuits. Use Value: Delivers low-drift reference (0.094 %/°C TC) with sub-µA leakage at 21.4 V, minimizing sensor offset error. |
| LED Driver Overvoltage Clamp | Microcontroller I/O Protection |
Use Scenario: Preventing damage to constant-current LED drivers during input surge events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across driver input terminals. Use Value: Activates at 27 V with fast response (ns-scale), limiting peak voltage to safe levels without affecting steady-state operation. |
Use Scenario: Protecting 3.3 V or 5 V MCU GPIO pins from external ESD or miswiring. IC Role / Device Role / Timing Role: Bidirectional clamping element (with series resistor) for I/O line protection. Use Value: Leverages low 0.1 µA reverse leakage at 21.4 V to avoid signal distortion while providing robust 27 V standoff capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5254B-TP (Micro Commercial) | Zener voltage 27 V ±5%, 500 mW rating, SOD123 package, no AEC-Q101 qualification | Not suitable for automotive use; acceptable for industrial/commercial power regulation | Select when AEC-Q101 compliance is not required and cost sensitivity outweighs qualification needs |
| BZX84-C27 (Nexperia) | Zener voltage 27 V ±5%, 300 mW rating, SOT23 package, AEC-Q101 qualified | Lower power rating limits use in sustained clamp scenarios; smaller footprint reduces thermal mass | Prefer where board space is constrained and peak transient energy is low (e.g., signal-level protection) |
Compared with MMSZ5254B-TP and BZX84-C27, BZT52C27Q-7-F uniquely combines AEC-Q101 qualification, 370 mW ambient-rated power, and tight 25.1–28.9 V tolerance in SOD123 - making it optimal for automotive power rail stabilization where reliability and thermal margin are critical.
Availability
BZT52C27Q-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, LED driver protection, and microcontroller I/O safeguarding requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZT52C27Q-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations spanning Asia, Europe, and the Americas.
The BZT52C series belongs to Diodes' automotive-qualified Zener diode portfolio, engineered specifically for voltage regulation and transient suppression in harsh-environment vehicle subsystems such as body control modules and ADAS sensor interfaces.
FAQ
What is the maximum reverse voltage (VR) at which leakage remains ≤0.1 µA?
The BZT52C27Q-7-F specifies a maximum reverse current of 0.1 µA at VR = 21.4 V, per the Electrical Characteristics table. This value is measured at TA = +25°C and defines the upper limit of the non-breakdown region before significant conduction begins.
Can this Zener diode be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in breakdown voltage, causing current imbalance when paralleled. Even with matched units, thermal runaway risk remains due to positive temperature coefficient. For higher power, select a single higher-rated device or implement active regulation.
Is the SOD123 package compatible with standard reflow profiles for lead-free soldering?
Yes - the device uses matte tin finish over alloy 42 leadframe and is rated for solderability per MIL-STD-202, Method 208. Its moisture sensitivity level is Level 1, permitting use with JEDEC J-STD-020-compliant lead-free reflow profiles without pre-baking.
How does the temperature coefficient affect regulation accuracy over –40°C to +125°C?
With a nominal TC of +0.094 %/°C, the zener voltage shifts approximately ±1.56 V across a 165°C range (from –40°C to +125°C), assuming linear behavior. Actual deviation is bounded by the min/max VZ limits (25.1–28.9 V) specified at +25°C and validated across temperature in AEC-Q101 testing.
BZT52C27Q-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):
- 27 V
- Tolerance:
- ±7.04%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18.9 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
BZT52C27Q-7-F FAQ
1.How can I place an order for BZT52C27Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C27Q-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 BZT52C27Q-7-F reliable?
The price and inventory of BZT52C27Q-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 BZT52C27Q-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C27Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C27Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C27Q-7-F?
BZT52C27Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C27Q-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 BZT52C27Q-7-F?
For technical support, including BZT52C27Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C27Q-7-F requirements.
6.How does Aetrix verify that BZT52C27Q-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C27Q-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 BZT52C27Q-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C27Q-7-F?
All BZT52C27Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C27Q-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 BZT52C27Q-7-F part is unused and in its original packaging.
Return procedure for BZT52C27Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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