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Nexperia USA Inc. BZT52-C12J
- Part No.:
- BZT52-C12J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C12J.pdf
- Description:
- DIODE ZENER 12.05V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:19,655
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Product details
Overview
BZT52-C12J from Nexperia is a Zener voltage regulator diode in SOD123 surface-mount package, rated for 12 V nominal Zener voltage at 5 mA test current, ±5 % tolerance, 590 mW total power dissipation, and low differential resistance (90 Ω max), used for precision voltage reference and overvoltage protection in low-power analog signal conditioning circuits.
For engineers reviewing the BZT52-C12J datasheet, BZT52-C12J pinout, BZT52-C12J application, or BZT52-C12J equivalent, this page delivers verified Zener parameters including VZ = 11.4–12.7 V, IR ≤ 0.1 μA at 9.4 V, rdif ≤ 90 Ω, TC = +6.0 mV/K, and thermal resistance Rth(j-sp) = 55 K/W - all critical for stable biasing and clamping in space-constrained PCB designs.
Technical Context
The BZT52-C12J operates as a reverse-biased silicon Zener diode with sharp breakdown knee and low dynamic impedance, enabling accurate voltage regulation under varying load conditions. Its temperature coefficient of +6.0 mV/K ensures predictable drift behavior across –55 °C to +150 °C ambient range.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it relies on defined thermal pad layout (1 cm² cathode mounting area) to sustain 590 mW continuous dissipation. The device exhibits < 0.1 μA reverse leakage at VR = 9.4 V and forward voltage ≤ 0.9 V at IF = 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V to 12.7 V at IZ = 5 mA - defines precise clamping threshold for 12 V rail stabilization |
| Tolerance | ±5 % - supports cost-optimized designs where tight regulation is balanced against BOM flexibility |
| Differential Resistance (rdif) | ≤ 90 Ω - ensures minimal output voltage shift under load current variation |
| Reverse Leakage (IR) | ≤ 0.1 μA at VR = 9.4 V - guarantees negligible standby current in high-impedance reference nodes |
| Power Dissipation (Ptot) | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Thermal Resistance (Rth(j-sp)) | 55 K/W - quantifies junction-to-solder-point heat transfer efficiency for thermal design margining |
| Temperature Coefficient (SZ) | +6.0 mV/K - enables predictable VZ drift compensation in temperature-sensitive analog circuits |
Pinout & Package
Package: SOD123 - small-outline diode with 2.80 mm × 1.70 mm footprint, 1.3 mm height, and cathode-marked band; optimized for automated reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked Band) | Cathode (K) | Connected to regulated output node; polarity indicator for correct PCB orientation and reverse-bias operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 90 Ω max ensures < 0.45 V output shift across 5 mA ±2 mA load variation |
| Stable temperature coefficient | +6.0 mV/K enables predictable VZ drift up to +150 °C junction temperature |
| High surge robustness | Non-repetitive peak reverse power of 40 W (100 μs pulse) protects against transient overvoltage |
| Low leakage performance | 0.1 μA max at 9.4 V allows use in nanoampere-level bias networks without loading error |
| SMD-optimized thermal design | 55 K/W junction-to-solder-point resistance supports reliable operation with minimal copper pour |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 16-bit ADC front-end in temperature transmitters operating from 12 V supply. IC Role / Device Role / Timing Role: Zener diode provides fixed 12 V reference point for op-amp biasing and ADC VREF buffer. Use Value: ±5 % VZ tolerance and +6.0 mV/K TC allow calibrated offset correction across –40 °C to +85 °C industrial range. |
Use Scenario: Protecting USB 2.0 data lines (D+/D−) from ESD-induced voltage spikes exceeding 3.6 V. IC Role / Device Role / Timing Role: Low-capacitance Zener clamps transient energy to ground before reaching PHY IC input pins. Use Value: 90 Ω rdif and 0.1 μA IR ensure minimal signal distortion during normal operation while triggering fast at >3.6 V. |
| Programmable Logic Controller (PLC) Input Protection | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Safeguarding 24 V digital input channels against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Zener shunts excess voltage to common rail, limiting input to safe levels for optocoupler LED drive circuitry. Use Value: 590 mW Ptot and 40 W non-repetitive surge rating absorb repetitive 100 ms overvoltage events without degradation. |
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCU powered by 3.3 V LDO. IC Role / Device Role / Timing Role: Zener-based resistor divider sets Brown-Out Detection (BOD) trip point at 2.85 V. Use Value: +6.0 mV/K TC aligns VZ drift with MCU's internal BOD hysteresis, maintaining functional reset window across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5242B | VZ = 12 V ±5 %, Ptot = 350 mW, rdif = 30 Ω max - lower power, tighter impedance | Lower thermal mass limits sustained clamp duty cycle in high-energy surge environments | Select when board space is constrained and average power < 350 mW; verify thermal pad layout compatibility |
| Vishay NZ9F12V | VZ = 12 V ±5 %, Ptot = 200 mW, rdif = 100 Ω max - smaller SOD-123 variant with reduced surge capability | Non-repetitive peak power limited to 10 W - unsuitable for repeated 24 V field fault events | Prefer for ultra-low-cost consumer applications where worst-case surge exposure is absent |
Compared with MMBZ5242B and NZ9F12V, BZT52-C12J offers superior thermal robustness (590 mW vs. ≤350 mW), higher surge immunity (40 W vs. ≤10 W), and lower temperature-induced VZ drift uncertainty - making it optimal for industrial-grade voltage reference and protection where long-term stability under thermal stress is required.
Availability
BZT52-C12J is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage clamp, and PLC input protection requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for BZT52-C12J 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on reliability, efficiency, and miniaturization for automotive, industrial, and consumer markets.
BZT52-C12J belongs to the BZT52 series of general-purpose Zener diodes designed specifically for cost-effective, space-efficient voltage regulation and transient suppression in surface-mounted power management and signal integrity applications.
FAQ
What is the maximum continuous reverse current the BZT52-C12J can handle at 25 °C ambient?
The BZT52-C12J is not rated for continuous reverse current; it operates in Zener breakdown mode with specified test current IZ = 5 mA. Its absolute maximum reverse current is limited by power dissipation: IZ(max) = Ptot/VZ ≈ 590 mW / 12 V ≈ 49 mA at Tamb = 25 °C with proper thermal pad layout. Exceeding this risks thermal runaway.
Does the BZT52-C12J meet automotive qualification standards?
No. Per Nexperia's revision history (Rev. 2, October 2025), the C-series BZT52 devices are explicitly designated as non-automotive qualified. They lack AEC-Q101 testing and are not warranted for automotive safety-critical systems. Automotive alternatives must be selected from Nexperia's dedicated -Q qualified portfolio.
How does the marking code 'CJ' correspond to the BZT52-C12J part number?
Per Table 4 of the datasheet, 'CJ' is the standardized marking code laser-etched on the SOD123 package body to identify the BZT52-C12J device. The 'C' denotes ±5 % tolerance, and 'J' maps to the 12 V nominal Zener voltage within the E24 series - confirmed by the row listing BZT52-C12 → CJ in the marking table.
Can the BZT52-C12J be used in parallel for higher power dissipation?
No. Zener diodes exhibit manufacturing spread in VZ, causing unequal current sharing when paralleled. Even with matched units, thermal coupling differences lead to thermal runaway in one device. For higher power, use a single higher-rated Zener or implement active regulation with a transistor-based shunt circuit.
BZT52-C12J 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):
- 12.05 V
- Tolerance:
- ±5.4%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-C12J FAQ
1.How can I place an order for BZT52-C12J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C12J 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-C12J reliable?
The price and inventory of BZT52-C12J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C12J is usually 5 days.
3.What payment methods are accepted for BZT52-C12J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C12J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C12J?
BZT52-C12J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C12J 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-C12J?
For technical support, including BZT52-C12J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C12J requirements.
6.How does Aetrix verify that BZT52-C12J is sourced from the original manufacturer or authorized distributors?
All BZT52-C12J 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-C12J meets industry standards.
7.What is the process for return or replacement of BZT52-C12J?
All BZT52-C12J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C12J, 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-C12J part is unused and in its original packaging.
Return procedure for BZT52-C12J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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