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Nexperia USA Inc. BZT52-C15X
- Part No.:
- BZT52-C15X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C15X.pdf
- Description:
- DIODE ZENER 14.7V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,616
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Product details
Overview
BZT52-C15X from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 15 V nominal Zener voltage at 5 mA, 110 Ω maximum differential resistance, and 590 mW total power dissipation at Tamb ≤ 25 °C; used for precision voltage reference and overvoltage clamping in low-power analog sensor interfaces.
For engineers reviewing the BZT52-C15X datasheet, BZT52-C15X pinout, BZT52-C15X application, or BZT52-C15X equivalent, this page delivers verified electrical parameters, thermal behavior under PCB mounting conditions, cathode/anode terminal mapping, and real-world substitution guidance for industrial signal conditioning designs.
Technical Context
This Zener diode operates in reverse breakdown with tightly controlled VZ = 13.8–15.6 V at IZ = 5 mA, exhibiting a temperature coefficient of +9.2 to +13.0 mV/K - indicating positive drift with junction temperature rise. Its low 110 Ω differential resistance ensures stable regulation under small-signal load variations.
The device uses planar epitaxial construction in silicon, optimized for surface-mount reliability on FR4 PCBs with single-sided copper and tin-plated pads. Thermal resistance from junction to solder point is 55 K/W, enabling predictable derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V to 15.6 V at IZ = 5 mA - defines stable regulation window for 15 V rail stabilization |
| Differential Resistance (rdif) | ≤ 110 Ω - limits output voltage shift under ±1 mA load current change |
| Reverse Current (IR) | ≤ 0.05 μA at VR = 12 V - ensures negligible leakage in standby bias networks |
| Total Power Dissipation (Ptot) | 590 mW at Tamb ≤ 25 °C on 1 cm² cathode pad - sets maximum continuous DC power handling |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables use as polarity-sensitive clamp in bidirectional protection circuits |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended-temperature industrial environments |
Pinout & Package
SOD123 plastic surface-mounted package: 2-terminal, flat lead, cathode-marked with bar; dimensions: 3.75 mm × 1.7 mm × 1.3 mm (L × W × H), 0.7 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical 15 V references without trimming circuitry |
| Low thermal resistance (55 K/W to solder point) | Permits accurate thermal modeling when mounted on standard FR4 with 1 cm² cathode pad |
| Non-repetitive peak reverse power (40 W) | Supports transient surge suppression up to 100 μs pulses without degradation |
| 150 °C max junction temperature | Allows deployment in enclosed enclosures or near heat-generating components |
| Marking code "CL" | Uniquely identifies BZT52-C15X on PCB for automated optical inspection and traceability |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters operating from 24 V loop supply. IC Role / Device Role / Timing Role: Zener diode provides fixed 15 V reference to op-amp bias network, ensuring consistent full-scale range across temperature. Use Value: 110 Ω rdif limits reference shift to <1.1 mV per 10 μA load variation, preserving measurement accuracy. |
Use Scenario: Clamping induced ESD transients on USB D+ line before entering USB PHY IC. IC Role / Device Role / Timing Role: Reverse-connected Zener absorbs >15 V spikes while presenting <0.9 V forward drop during bus fault conditions. Use Value: 40 W non-repetitive peak power rating handles IEC 61000-4-2 Level 4 (8 kV contact) surges without failure. |
| Programmable Logic Controller (PLC) Input Threshold Setting | Low-Power IoT Node Voltage Monitoring |
|
Use Scenario: Defining logic-high threshold for 24 V digital input module using resistor divider into Schmitt trigger. IC Role / Device Role / Timing Role: Zener regulates divider midpoint to 15 V, establishing noise-immune switching threshold independent of supply ripple. Use Value: ±5 % VZ tolerance ensures threshold remains within 14.25–15.75 V, meeting PLC immunity requirements. |
Use Scenario: Monitoring battery voltage in coin-cell-powered environmental sensor node with ultra-low quiescent current. IC Role / Device Role / Timing Role: Reverse-biased Zener leaks only ≤0.05 μA at 12 V, extending 10-year battery life without active supervision. Use Value: Sub-microampere IR enables direct connection to microcontroller ADC without loading primary power path. |
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 MMBZ5245B | VZ = 15.0 V ±5 %, Ptot = 350 mW, rdif = 17 Ω - tighter regulation but lower power rating | Preferred where low rdif dominates over thermal margin; unsuitable for >350 mW continuous dissipation | Select when board space allows larger thermal pad or when regulation stability outweighs power headroom |
| Vishay BZX79-C15 | VZ = 15.0 V ±5 %, DO-35 through-hole package, Ptot = 500 mW - legacy axial design with higher thermal resistance | Used in repair/replacement contexts requiring through-hole compatibility; not suitable for high-density SMT layouts | Choose only for legacy board rework or prototyping where SOD123 footprint is unavailable |
Compared with MMBZ5245B, BZT52-C15X trades 17 Ω vs. 110 Ω rdif for +240 mW power margin and SOD123 manufacturability; versus BZX79-C15, it gains 90 mW dissipation and 40% smaller footprint at the cost of manual assembly compatibility.
Availability
BZT52-C15X is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and programmable logic controller input threshold setting requiring stable component supply and long-term lifecycle continuity.
Supply support for BZT52-C15X 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 high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
BZT52 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, surface-mount voltage regulation and clamping in space-constrained industrial electronics.
FAQ
What is the maximum continuous reverse current the BZT52-C15X can sustain at 15 V?
The BZT52-C15X is not rated for continuous reverse conduction at its Zener voltage - it is designed for regulated breakdown at IZ = 5 mA. At VR = 12 V, reverse current is ≤0.05 μA; sustained operation above 5 mA requires thermal derating per the 590 mW Ptot limit and junction temperature cap of 150 °C.
Can BZT52-C15X replace BZT52-B15 in an existing design?
Yes, but with tolerance trade-off: BZT52-B15 offers ±2 % VZ (14.7–15.3 V), while BZT52-C15X has ±5 % (13.8–15.6 V). Differential resistance is higher (110 Ω vs. 70 Ω), increasing output sensitivity to load changes. No PCB layout change is needed - both use identical SOD123 package and marking "DS" (B15) vs. "CL" (C15X).
How does the 55 K/W Rth(j-sp) value translate to practical PCB layout requirements?
Rth(j-sp) = 55 K/W assumes a 1 cm² copper pad connected to the cathode terminal. To achieve this thermal performance, the PCB must use ≥35 μm copper thickness, tin plating, and avoid thermal isolation cuts around the pad. Reducing pad area to 0.5 cm² increases Rth by ~20–30 %, requiring proportional power derating.
Is BZT52-C15X qualified for automotive applications?
No. Per Nexperia's revision history (Rev. 2, October 2025), C-series BZT52 devices are explicitly designated as non-automotive qualified. For automotive use, Nexperia recommends the -Q qualified variants such as BZT52-C15-Q, which undergo additional AEC-Q101 stress testing and PPAP documentation.
BZT52-C15X 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):
- 14.7 V
- Tolerance:
- ±6.1%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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-C15X FAQ
1.How can I place an order for BZT52-C15X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C15X 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-C15X reliable?
The price and inventory of BZT52-C15X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C15X is usually 5 days.
3.What payment methods are accepted for BZT52-C15X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C15X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C15X?
BZT52-C15X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C15X 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-C15X?
For technical support, including BZT52-C15X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C15X requirements.
6.How does Aetrix verify that BZT52-C15X is sourced from the original manufacturer or authorized distributors?
All BZT52-C15X 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-C15X meets industry standards.
7.What is the process for return or replacement of BZT52-C15X?
All BZT52-C15X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C15X, 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-C15X part is unused and in its original packaging.
Return procedure for BZT52-C15X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52-C15X Tags
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