My Inquiry
My Account
Diodes Incorporated BZT52HC18WF-7
- Part No.:
- BZT52HC18WF-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52HC18WF-7.pdf
- Description:
- DIODE ZENER 18V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT52HC18WF-7 from Diodes Incorporated is a surface-mount 18 V Zener diode in SOD123F package, rated for 5 mA test current, 20 Ω dynamic impedance at 5 mA, ±12.6 mV/°C temperature coefficient, and 70 pF capacitance at 1 MHz with 0 V reverse bias. It provides precision voltage regulation in low-power analog sensing and power rail clamping circuits.
For engineers reviewing the BZT52HC18WF-7 datasheet, BZT52HC18WF-7 pinout, BZT52HC18WF-7 application, or BZT52HC18WF-7 equivalent, key selection criteria include Zener voltage tolerance (16.8–19.1 V), thermal resistance (150 °C/W on 1 cm² cathode pad), AEC-Q101 qualification, RoHS/Green compliance, and SOD123F footprint compatibility.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its −3.5 to +16.0 mV/°C temperature coefficient range ensures predictable drift behavior across −65 °C to +150 °C operating temperature.
The device delivers 375 mW power dissipation on standard FR-4 PCBs and up to 830 mW when mounted with a 1 cm² cathode thermal pad. Its 0.9 V forward voltage at 10 mA supports low-loss polarity verification during functional testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 16.8–19.1 V at 5 mA - defines regulated output range for voltage reference or overvoltage clamp |
| Zener Impedance | 20 Ω at 5 mA - determines regulation stiffness under load transients |
| Power Dissipation | 830 mW with 1 cm² cathode pad - enables higher continuous current in thermally optimized layouts |
| Temperature Coefficient | +12.4 to +16.0 mV/°C - quantifies positive drift slope above ~6 V, critical for temp-compensated references |
| Capacitance | 70 pF at 1 MHz, 0 V - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| Reverse Leakage | 0.05 µA at 12.6 V - ensures minimal quiescent current in battery-powered voltage monitor circuits |
Pinout & Package
Package: SOD123F (Type B), flat-lead surface-mount package with cathode band marking; dimensions: 3.50 mm length × 1.80 mm width × 1.15 mm height; 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 circuit; used for forward-bias verification |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; connects to regulated rail; primary thermal path via cathode pad |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified reliability | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meeting JEDEC J-STD-020 Level 1 |
| Low-profile SOD123F footprint | 1.15 mm max height enables use in space-constrained portable and wearables designs |
| Matte tin annealed terminals | Solderable per MIL-STD-202 Method 208; compatible with lead-free reflow profiles and wave soldering |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC reference in BCM subassemblies. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 18 V rail for analog front-end ICs. Use Value: AEC-Q101 qualification ensures operation across −40 °C to +125 °C ambient without calibration drift beyond ±12.6 mV/°C. |
Use Scenario: Clamping transient spikes on 24 V industrial I/O lines connected to analog sensor interfaces. IC Role / Device Role / Timing Role: Overvoltage protection element limiting input to downstream op-amps and ADC drivers. Use Value: 70 pF capacitance minimizes signal distortion on 10 kHz–1 MHz sensor outputs while absorbing >1 kV ESD events. |
| Medical Patient Monitor Power Rails | Consumer IoT Battery Management |
Use Scenario: Stabilizing auxiliary 18 V supply for isolated gate drivers in defibrillator charging circuits. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent gate drive timing despite battery aging. Use Value: 20 Ω Zener impedance maintains <±0.1 V regulation error under 1–5 mA load variation across 10-year service life. |
Use Scenario: Providing low-quiescent reference for fuel gauge ICs monitoring Li-ion cell stacks in smart home devices. IC Role / Device Role / Timing Role: Low-leakage voltage reference enabling accurate state-of-charge estimation. Use Value: 0.05 µA reverse leakage at 12.6 V extends shelf life and reduces standby current by >50 nA vs. legacy Zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5245B-7-F | 16.7–18.3 V range, 20 Ω Zz, SOD-123 package, no AEC-Q101 rating | Lacks automotive qualification; suitable only for commercial-grade consumer electronics | Select when cost sensitivity outweighs automotive reliability requirements |
| BZX84-C18LT1G | 17.1–18.9 V range, 30 Ω Zz, SOT-23 package, AEC-Q101 qualified | Higher impedance degrades regulation under load; larger footprint than SOD123F | Prefer when existing SOT-23 layout reuse is prioritized over thermal performance |
Compared with MMSZ5245B-7-F and BZX84-C18LT1G, BZT52HC18WF-7 offers tighter voltage tolerance, lower thermal resistance (150 °C/W), and verified AEC-Q101 compliance-making it optimal for thermally demanding automotive and industrial applications where long-term stability is critical.
Availability
BZT52HC18WF-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, medical patient monitors, and consumer IoT battery management systems requiring stable component supply and AEC-Q101 assurance.
Supply support for BZT52HC18WF-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, manufacturing, and sales operations across Asia, Europe, and North America.
The BZT52HC series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, green packaging, and tight parametric consistency across temperature.
FAQ
What is the maximum power dissipation of BZT52HC18WF-7 under standard PCB conditions?
BZT52HC18WF-7 dissipates up to 375 mW when mounted on an FR-4 PCB using Diodes Incorporated's minimum recommended pad layout. This rating assumes natural convection cooling and accounts for thermal resistance of 330 °C/W junction-to-ambient. Derating begins linearly above +25 °C ambient.
How does the temperature coefficient affect voltage regulation accuracy over temperature?
With a specified +12.4 to +16.0 mV/°C coefficient, BZT52HC18WF-7 exhibits predictable positive drift: at +100 °C ambient, its Zener voltage increases by approximately +1.24–1.60 V relative to 25 °C. This must be factored into reference design margins for precision analog circuits.
Is BZT52HC18WF-7 compatible with lead-free reflow soldering processes?
Yes. Its matte tin-annealed copper alloy terminals meet MIL-STD-202 Method 208 solderability requirements and are qualified for peak reflow temperatures up to 260 °C, supporting standard Pb-free SAC305 profiles without dewetting or intermetallic degradation.
Can BZT52HC18WF-7 be used as a bidirectional ESD protector?
No. As a unidirectional Zener diode, it conducts only in reverse breakdown and forward conduction modes. For bidirectional ESD protection, TVS diodes such as D28V0L4U2P or PUSB3FR4 are required; BZT52HC18WF-7 serves strictly as a voltage reference or unidirectional clamp.
BZT52HC18WF-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):
- 18 V
- Tolerance:
- ±6.39%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 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
BZT52HC18WF-7 FAQ
1.How can I place an order for BZT52HC18WF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52HC18WF-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 BZT52HC18WF-7 reliable?
The price and inventory of BZT52HC18WF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52HC18WF-7 is usually 5 days.
3.What payment methods are accepted for BZT52HC18WF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52HC18WF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52HC18WF-7?
BZT52HC18WF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52HC18WF-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 BZT52HC18WF-7?
For technical support, including BZT52HC18WF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52HC18WF-7 requirements.
6.How does Aetrix verify that BZT52HC18WF-7 is sourced from the original manufacturer or authorized distributors?
All BZT52HC18WF-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 BZT52HC18WF-7 meets industry standards.
7.What is the process for return or replacement of BZT52HC18WF-7?
All BZT52HC18WF-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52HC18WF-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 BZT52HC18WF-7 part is unused and in its original packaging.
Return procedure for BZT52HC18WF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52HC18WF-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…
