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Nexperia USA Inc. BZT52-C18J
- Part No.:
- BZT52-C18J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C18J.pdf
- Description:
- DIODE ZENER 17.95V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,990
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Product details
Overview
BZT52-C18J from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 18 V nominal Zener voltage at 5 mA, 170 Ω maximum differential resistance, and 590 mW total power dissipation at Tamb ≤ 25 °C; used for precision voltage reference and low-power regulation in sensor biasing and power supply feedback loops.
For engineers reviewing the BZT52-C18J datasheet, BZT52-C18J pinout, BZT52-C18J application, or BZT52-C18J equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (210 K/W junction-to-solder-point), reverse current at 16.2 V (≤0.05 μA), temperature coefficient (12.6 mV/K), and SOD123 footprint compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. Its 18 V nominal Zener voltage is specified at IZ = 5 mA with ±5 % tolerance, and exhibits a positive temperature coefficient of +12.6 mV/K over 25–150 °C.
The device features low differential resistance (≤170 Ω) ensuring minimal voltage deviation with current changes, and supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses - critical for transient suppression in low-energy circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 16.8 V to 19.1 V at IZ = 5 mA - defines stable regulation range for feedback networks |
| Differential Resistance rdif | ≤170 Ω - limits output voltage variation under ±1 mA load current shift |
| Reverse Current IR | ≤0.05 μA at VR = 16.2 V - ensures negligible leakage in high-impedance biasing |
| Power Dissipation Ptot | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power in standard FR4 PCB layout |
| Thermal Resistance Rth(j-sp) | 210 K/W - quantifies junction-to-solder-point heat transfer efficiency on 1 cm² cathode pad |
| Forward Voltage VF | ≤0.9 V at IF = 10 mA - enables use as polarity protection diode in dual-role designs |
| Temperature Coefficient SZ | +12.6 mV/K - indicates predictable voltage drift per degree rise, usable for temp-compensated references |
Pinout & Package
SOD123 surface-mount plastic package: 2.80 mm × 1.70 mm body, 0.70 mm lead pitch, cathode marked by band; optimized for reflow soldering with defined 0.81 mm × 2.36 mm copper pad footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking band identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective voltage referencing without trimming in non-critical analog stages |
| Low 170 Ω differential resistance | Maintains <±180 mV output shift across ±1 mA Zener current variation |
| 210 K/W junction-to-solder-point thermal resistance | Supports 270 mW derated power at 85 °C ambient when mounted per spec |
| 0.05 μA max reverse leakage at 90 % VZ | Permits use in microamp-level sensor excitation circuits without loading error |
| SOD123 footprint compatibility | Aligns with IPC-7351B standard for automated placement and reflow yield >99.9 % |
Applications
| Industrial Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 18 V bias to MEMS pressure sensor bridge in factory automation transmitters. IC Role / Device Role / Timing Role: Zener voltage reference establishing excitation potential; no timing function. Use Value: ±5 % tolerance and 170 Ω rdif limit bridge voltage drift to <±0.9 V across 0–1 mA load variation. |
Use Scenario: Clamping USB VBUS line against 20 V surges in embedded host controllers. IC Role / Device Role / Timing Role: Reverse-biased transient voltage suppressor; no timing function. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs/20 V spikes without failure. |
| SMPS Feedback Divider Reference | Microcontroller Reset Circuit |
|
Use Scenario: Setting precise 18 V threshold in optocoupler-based feedback network of 24 V input DC-DC converter. IC Role / Device Role / Timing Role: Precision voltage reference for error amplifier input; no timing function. Use Value: +12.6 mV/K temperature coefficient allows predictable compensation of TL431 drift in wide-temp designs. |
Use Scenario: Generating clean 18 V reset threshold for ARM Cortex-M0+ MCU in battery-powered IoT node. IC Role / Device Role / Timing Role: Voltage monitor enabling POR and brown-out detection; no timing function. Use Value: 0.05 μA reverse leakage avoids measurable drain on 10 μF hold-up capacitor during 10 s sleep cycles. |
Availability
BZT52-C18J is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port protection, SMPS feedback referencing, and microcontroller reset circuitry requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52-C18J 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
Nexperia is a global semiconductor expert focused on essential system functionality, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer applications.
BZT52-C18J belongs to the BZT52 series of general-purpose Zener diodes designed for cost-sensitive, space-constrained voltage regulation and reference tasks in surface-mounted power and signal conditioning circuits.
FAQ
What is the Zener test current for BZT52-C18J?
The nominal Zener voltage of 18 V is specified at a test current of 5 mA, as confirmed in Table 8 of the Nexperia datasheet. This current level balances measurement stability and self-heating effects, and is the standard condition for verifying voltage tolerance and differential resistance.
Can BZT52-C18J be used in place of a BZT52-B18?
No - BZT52-C18J has ±5 % voltage tolerance while BZT52-B18 has ±2 %. Their Zener voltage ranges differ: C18J is 16.8–19.1 V vs. B18's 17.6–18.4 V. Substitution requires verification of circuit margin for the wider tolerance and higher rdif (170 Ω vs. 110 Ω).
What is the maximum continuous reverse voltage before breakdown?
The maximum recommended reverse voltage prior to entering regulation is 16.2 V - defined as 90 % of the minimum specified VZ (16.8 V). At this voltage, reverse current is guaranteed ≤0.05 μA, ensuring minimal leakage in standby operation.
Does BZT52-C18J meet automotive qualification standards?
No - per Nexperia's revision history (Table 11), the C-series devices are explicitly designated as non-automotive qualified. For automotive applications, Nexperia offers separate -Q qualified variants; BZT52-C18J is intended for industrial, consumer, and commercial use only.
BZT52-C18J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 17.95 V
- Tolerance:
- ±6.4%
- Power - Max:
- 350 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:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52-C18J FAQ
1.How can I place an order for BZT52-C18J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C18J 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 BZT52-C18J reliable?
The price and inventory of BZT52-C18J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C18J is usually 5 days.
3.What payment methods are accepted for BZT52-C18J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C18J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C18J?
BZT52-C18J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C18J 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 BZT52-C18J?
For technical support, including BZT52-C18J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C18J requirements.
6.How does Aetrix verify that BZT52-C18J is sourced from the original manufacturer or authorized distributors?
All BZT52-C18J 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 BZT52-C18J meets industry standards.
7.What is the process for return or replacement of BZT52-C18J?
All BZT52-C18J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C18J, 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 BZT52-C18J part is unused and in its original packaging.
Return procedure for BZT52-C18J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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