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Diodes Incorporated BZT52HC27WFQ-7
- Part No.:
- BZT52HC27WFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC27WFQ-7.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,615
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Product details
Overview
BZT52HC27WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with a nominal zener voltage of 27 V, ±5% tolerance (25.1–28.9 V), 2 mA test current, 40 Ω dynamic impedance at 2 mA, and 50 pF capacitance at 1 MHz. It operates in automotive power supply regulation and voltage reference circuits where stable clamping under transient conditions is required.
For engineers reviewing the BZT52HC27WFQ datasheet, BZT52HC27WFQ pinout, BZT52HC27WFQ application, or BZT52HC27WFQ equivalent, key selection criteria include its 27 V zener voltage tolerance, low 0.05 µA reverse leakage at 18.9 V, SOD123F package thermal resistance (150 °C/W on 1 cm² cathode pad), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode functions as a precision voltage reference and overvoltage clamp in DC bias networks and ESD-protected signal rails. Its 27 V breakdown is specified at IZT = 2 mA with TC = +21.4 mV/°C, indicating positive temperature coefficient behavior above 6.2 V.
The device uses a planar epitaxial junction structure in a flat-lead SOD123F package, enabling high power dissipation (830 mW on optimized PCB) and low profile mounting. Cathode band polarity and matte tin-plated terminals ensure reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V at IZT = 2 mA - defines clamping threshold for 27 V nominal rail protection |
| Zener Impedance (ZZT) | 40 Ω at IZT = 2 mA - determines voltage deviation under load current variation |
| Reverse Leakage (IR) | 0.05 µA max at VR = 18.9 V - ensures minimal standby current in high-impedance bias networks |
| Power Dissipation (PD) | 830 mW on FR-4 with 1 cm² cathode pad - sets maximum continuous clamping energy capability |
| Capacitance (CT) | 50 pF at f = 1 MHz, VR = 0 V - limits high-frequency signal coupling in RF-adjacent bias lines |
| Temperature Coefficient (TC) | +21.4 mV/°C at IZT = 2 mA - quantifies voltage drift with ambient temperature change |
| Package | SOD123F - 1.8 mm × 2.7 mm footprint with 0.35–0.85 mm lead length, optimized for automated placement and thermal relief |
Pinout & Package
Package: SOD123F - flat-lead, surface-mount plastic package with cathode band marking; dimensions: 1.80 mm (D) × 2.70 mm (E) × 0.85 mm (L max); weight ≈ 0.015 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated node; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage clamp input | Marked with band; connects to higher-potential rail requiring stabilization or transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics with PPAP support |
| SOD123F thermal performance | 150 °C/W junction-to-ambient resistance on 1 cm² copper pad enables 830 mW operation without derating |
| Green compound construction | Halogen- and antimony-free molding compound (Br+Cl <1500 ppm, Sb <1000 ppm) meets RoHS 3 and IATF 16949 requirements |
| Cathode band polarity marking | Unambiguous visual identification for automated optical inspection and manual assembly verification |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamping 24 V CAN bus power line against load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator to divert surge current away from downstream LDOs and microcontrollers. Use Value: 27 V breakdown prevents overvoltage damage while maintaining <0.05 µA leakage to preserve battery life in always-on modules. |
Use Scenario: Providing stable 27 V reference for analog front-end amplifiers in pressure transducers. IC Role / Device Role / Timing Role: Precision voltage reference source for excitation circuitry and ADC reference scaling. Use Value: +21.4 mV/°C TC enables predictable compensation in temperature-compensated sensor calibration algorithms. |
| USB-C PD Port Protection | Programmable Logic Supply Monitor |
|
Use Scenario: Overvoltage protection on 20 V USB-C Power Delivery auxiliary rails. IC Role / Device Role / Timing Role: Fast-response clamp limiting voltage spikes during hot-plug events and adapter switching. Use Value: 50 pF capacitance avoids signal integrity degradation on high-speed CC and SBU lines adjacent to protected rail. |
Use Scenario: Monitoring 27 V FPGA auxiliary supply for brown-out detection in industrial PLCs. IC Role / Device Role / Timing Role: Threshold detector element feeding comparator input in supervisor IC circuits. Use Value: Tight 25.1–28.9 V tolerance ensures accurate trip point across production lots and temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5260B-TP (Micro Commercial) | 27 V nominal, ±5%, IZT = 20 mA, ZZT = 35 Ω, no AEC-Q101 qualification | Rated for commercial temperature range only (−65°C to +150°C not validated per AEC-Q101 stress tests) | Select when automotive qualification is unnecessary and higher test current improves regulation stability |
| BZX84-C27 (Nexperia) | 27 V nominal, ±5%, IZT = 5 mA, ZZT = 70 Ω, SOT23 package, AEC-Q101 qualified | Higher dynamic impedance reduces regulation accuracy under varying load; smaller SOT23 limits thermal margin | Choose when board space is constrained and 70 Ω impedance is acceptable for less critical biasing |
Compared with MMSZ5260B-TP and BZX84-C27, BZT52HC27WFQ offers superior thermal performance (830 mW vs. ≤350 mW), lower leakage (0.05 µA vs. ≥0.1 µA), and full AEC-Q101 validation-making it optimal for automotive power rail clamping where reliability and thermal headroom are critical.
Availability
BZT52HC27WFQ is available at Aetrix Electronics and suitable for automotive power rail clamping, industrial sensor biasing, USB-C PD port protection, and FPGA supply monitoring requiring stable component supply and long-term lifecycle assurance.
Supply support for BZT52HC27WFQ 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 North America.
The BZT52HC series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in harsh-environment vehicle subsystems including ADAS, infotainment, and body control modules.
FAQ
What is the maximum power dissipation of BZT52HC27WFQ under standard PCB conditions?
BZT52HC27WFQ delivers 830 mW maximum power dissipation when mounted on FR-4 with a 1 cm² copper pad on the cathode terminal, per Note 7 in DS41143 Rev. 4-2. With minimum recommended pad layout (Note 6), dissipation drops to 375 mW. Derating begins linearly above +25°C ambient, reaching zero at +150°C.
Does BZT52HC27WFQ have a defined temperature coefficient, and how does it affect circuit design?
Yes, BZT52HC27WFQ has a specified temperature coefficient of +21.4 mV/°C at IZT = 2 mA. This positive TC means its zener voltage increases with rising temperature-critical for designs requiring stable references across −40°C to +125°C automotive ranges. Compensation must be applied in precision bias networks.
Is the SOD123F package compatible with standard reflow profiles for lead-free soldering?
Yes, the SOD123F package uses matte tin annealed terminals compliant with MIL-STD-202, Method 208, and supports JEDEC J-STD-020 moisture sensitivity Level 1. It withstands peak reflow temperatures up to 260°C for ≤60 seconds, matching IPC/JEDEC standard lead-free profiles without delamination or solder joint failure.
How is polarity identified on the BZT52HC27WFQ device body?
Polarity is marked by a visible cathode band located at one end of the SOD123F package body. The band corresponds to the cathode terminal, which must be connected to the higher-potential node in zener operation. This marking is verified optically during AOI and aligns with Diodes' standardized SOD123F top-view orientation in DS41143.
BZT52HC27WFQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5.88%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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-123F
BZT52HC27WFQ-7 FAQ
1.How can I place an order for BZT52HC27WFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC27WFQ-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 BZT52HC27WFQ-7 reliable?
The price and inventory of BZT52HC27WFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC27WFQ-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC27WFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC27WFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC27WFQ-7?
BZT52HC27WFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC27WFQ-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 BZT52HC27WFQ-7?
For technical support, including BZT52HC27WFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC27WFQ-7 requirements.
6.How does Aetrix verify that BZT52HC27WFQ-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC27WFQ-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 BZT52HC27WFQ-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC27WFQ-7?
All BZT52HC27WFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC27WFQ-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 BZT52HC27WFQ-7 part is unused and in its original packaging.
Return procedure for BZT52HC27WFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52HC27WFQ-7 Tags
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