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Diodes Incorporated BZT52HC27WF-7
- Part No.:
- BZT52HC27WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC27WF-7.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,421
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Product details
Overview
BZT52HC27WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 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 provides precision voltage regulation in low-power analog monitoring circuits, such as overvoltage protection for microcontroller I/O rails and reference voltage generation in sensor signal conditioning stages.
For engineers reviewing the BZT52HC27WF-7 datasheet, BZT52HC27WF-7 pinout, BZT52HC27WF-7 application, or BZT52HC27WF-7 equivalent, key selection criteria include zener voltage stability across temperature (TC = +21.4 mV/°C), low leakage (<0.05 µA at 18.9 V), SOD123F package thermal performance (RθJA = 150 °C/W with 1 cm² cathode pad), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp or regulate voltage at its specified VZ. Its positive temperature coefficient (+21.4 mV/°C) ensures predictable drift in high-temperature environments, enabling stable reference design without external compensation. The device uses a planar epitaxial construction optimized for low noise and repeatable breakdown characteristics.
Designed for surface-mount assembly on FR-4 PCBs, it delivers 830 mW power dissipation when mounted with a 1 cm² copper pad-nearly 2.2× higher than standard SOD123F derating-supporting robust transient suppression in space-constrained automotive and industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V at IZ = 2 mA - defines clamping threshold for 24 V system overvoltage protection |
| Zener Impedance (ZZT) | 40 Ω at IZ = 2 mA - determines regulation stiffness under load variation |
| Reverse Leakage (IR) | <0.05 µA at VR = 18.9 V - ensures minimal quiescent current in battery-powered sensing nodes |
| Capacitance (CT) | 50 pF at f = 1 MHz, VR = 0 V - limits high-frequency noise coupling in precision analog front-ends |
| Power Dissipation (PD) | 830 mW with 1 cm² cathode pad - enables sustained clamping during repetitive transients without thermal runaway |
| Temperature Coefficient (TC) | +21.4 mV/°C at IZ = 2 mA - allows accurate prediction of VZ shift from −40°C to +125°C |
| Package | SOD123F (Type B) - 1.8 mm × 2.7 mm footprint with flat lead design for low profile and enhanced thermal conduction |
Pinout & Package
SOD123F (Type B) is a surface-mount plastic package with two terminals: anode and cathode marked by a band. The flat lead design improves heat transfer to PCB copper and reduces profile height to 1.15 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in shunt regulator configuration | Connected to system ground or lowest potential point; establishes return path for zener current |
| Cathode (banded end) | Voltage sensing and clamping node | Connected to protected rail; conducts when voltage exceeds VZ, diverting excess current to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring high-reliability voltage references |
| Halogen- and antimony-free "Green" compound | Meets JESD22-A112 for material content; <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports RoHS 2 and ELV compliance |
| Low-profile SOD123F package | Height ≤1.15 mm - enables use in ultra-thin consumer wearables and compact automotive sensors |
| Moisture Sensitivity Level 1 | No floor life limitation before reflow - eliminates baking requirements and simplifies SMT line logistics |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 24 V supply rail for LIN bus transceivers and door lock actuators. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp protecting 5 V LDO input stage. Use Value: Maintains stable 24 V reference despite battery fluctuations; TC tracking enables accurate fault detection across −40°C to +125°C. |
Use Scenario: Providing stable bias voltage for bridge amplifier inputs in pressure transducers. IC Role / Device Role / Timing Role: Precision DC reference source for ratiometric ADC excitation. Use Value: Low 50 pF capacitance prevents phase shift in 10 kHz sensor bandwidth; <0.05 µA leakage preserves µA-level sleep current. |
| Smart Meter Power Supply Monitoring | Medical Portable Diagnostic Device |
Use Scenario: Detecting brownout conditions on 24 V auxiliary power in electricity meters. IC Role / Device Role / Timing Role: Threshold detector feeding comparator input in power-fail interrupt circuit. Use Value: Tight 5% VZ tolerance ensures consistent trip point across production lots; AEC-Q101 grade assures 15-year field reliability. |
Use Scenario: Clamping ESD transients on USB-C VBUS line in handheld ultrasound probes. IC Role / Device Role / Timing Role: Secondary overvoltage protector downstream of TVS array. Use Value: 40 Ω ZZT ensures fast response to 1 kV/µs surges; SOD123F footprint fits tight 2-layer PCB layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5262BT1G | Zener voltage 27 V ±5%, but rated at IZ = 20 mA; ZZT = 35 Ω - lower impedance but higher test current shifts operating point | Requires higher bias current; less suitable for µA-level sleep-mode circuits | Select when higher power handling (500 mW) and tighter VZ distribution are prioritized over low-leakage operation |
| BZX84-C27 | SOT-23 package; VZ = 27 V ±5% at IZ = 5 mA; ZZT = 80 Ω - larger impedance and different thermal resistance (RθJA = 300 °C/W) | Higher self-heating risk under sustained clamp; unsuitable for high-ambient automotive under-hood use | Prefer for cost-sensitive consumer applications where AEC-Q101 is not required and board space permits SOT-23 |
Compared with MMSZ5262BT1G and BZX84-C27, BZT52HC27WF-7 offers superior thermal performance (RθJA = 150 °C/W), lower leakage (<0.05 µA), and AEC-Q101 qualification-making it the optimal choice for automotive and industrial systems demanding long-term stability and low-power operation.
Availability
BZT52HC27WF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, smart meter power monitoring, and portable medical diagnostics requiring stable component supply and AEC-Q101-compliant reliability.
Supply support for BZT52HC27WF-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The BZT52HC series targets precision voltage reference and overvoltage protection in space-constrained, thermally demanding applications-designed specifically for AEC-Q101 compliance and green manufacturing standards.
FAQ
What is the maximum continuous power dissipation for BZT52HC27WF-7 on a standard FR-4 PCB?
The device dissipates up to 830 mW when mounted with a 1 cm² copper pad on FR-4, per Note 7 in DS36891 Rev. 4-2. Without the extended pad, power rating drops to 375 mW (Note 6). Derating begins linearly above +25°C ambient, reaching zero at +150°C.
Does BZT52HC27WF-7 have polarity marking, and how is it identified?
Yes-the cathode is marked by a visible band on the SOD123F package body. Per mechanical data, this band aligns with the cathode terminal, which must connect to the higher-potential node in shunt regulation configurations. The anode is unmarked and connects to ground or reference potential.
Is BZT52HC27WF-7 suitable for use in high-frequency signal paths?
Its 50 pF junction capacitance at 0 V reverse bias limits use above ~3 MHz in AC-coupled applications. However, it remains effective for DC biasing, voltage reference, and transient suppression below 100 kHz. For RF bypass, a dedicated low-CJ diode like BAS16 is recommended.
How does the +21.4 mV/°C temperature coefficient affect circuit design?
This positive TC means VZ increases predictably with temperature-enabling compensation of negative-drift components (e.g., op-amp input offset) in precision references. Designers can calculate VZ at any TJ using ΔVZ = +21.4 mV/°C × (TJ − 25°C), critical for automotive under-hood applications spanning −40°C to +125°C.
BZT52HC27WF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±7.04%
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52HC27WF-7 FAQ
1.How can I place an order for BZT52HC27WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC27WF-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 BZT52HC27WF-7 reliable?
The price and inventory of BZT52HC27WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC27WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC27WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC27WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC27WF-7?
BZT52HC27WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC27WF-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 BZT52HC27WF-7?
For technical support, including BZT52HC27WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC27WF-7 requirements.
6.How does Aetrix verify that BZT52HC27WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC27WF-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 BZT52HC27WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC27WF-7?
All BZT52HC27WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC27WF-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 BZT52HC27WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC27WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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