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Nexperia USA Inc. BZT52-C11X
- Part No.:
- BZT52-C11X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C11X.pdf
- Description:
- DIODE ZENER 11V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
BZT52-C11X from Nexperia is a Zener voltage regulator diode in SOD123 surface-mount package, designed for precision low-power voltage reference and clamping in biasing, protection, and regulation circuits. It delivers a nominal 11 V Zener voltage at 5 mA, ±5 % tolerance, with 70 Ω typical differential resistance and 0.1 μA reverse current at 8.5 V, suitable for industrial sensor signal conditioning and power rail stabilization.
For engineers reviewing the BZT52-C11X datasheet, BZT52-C11X pinout, BZT52-C11X application, or BZT52-C11X equivalent, key selection criteria include its 11 V nominal Zener voltage, SOD123 thermal performance (Rth(j-sp) = 210 K/W), low 0.9 V forward voltage at 10 mA, and non-automotive qualification status per Rev. 2 (2025) specification.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations, with temperature coefficient of +5.4 mV/K at 5 mA enabling predictable drift compensation in mid-voltage references. Its low 70 Ω differential resistance ensures minimal output impedance under dynamic current loads up to 250 mA peak.
The device uses planar epitaxial construction for tight parameter distribution and reliability in FR4 PCB mounting, with cathode-anode polarity clearly marked by a band on the SOD123 body. Thermal resistance from junction to solder point (210 K/W) supports sustained operation at ≤150 °C junction temperature when mounted per standard footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 10.4 V to 11.6 V at IZ = 5 mA - defines precise regulation window for 11 V nominal reference applications |
| Differential Resistance rdif | 70 Ω typical - ensures low output impedance and minimal voltage shift under ±1 mA load variation |
| Reverse Current IR | 0.1 μA max at VR = 8.5 V - enables low-leakage bias networks in high-impedance analog stages |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - supports efficient anode-cathode conduction during transient clamping |
| Total Power Dissipation Ptot | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature Tj | 150 °C max - determines upper thermal limit for long-term reliability in enclosed environments |
| Package | SOD123 - 2.8 mm × 1.7 mm surface-mount outline with cathode band marking and 0.7 mm lead pitch |
Pinout & Package
SOD123 plastic surface-mount package: 2-terminal, flat lead, cathode marked by a visible band; dimensions 2.80 mm × 1.70 mm × 1.30 mm (L × W × H), 0.70 mm lead width, 0.25 mm lead thickness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker band aligns with this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective voltage referencing without trimming in non-critical 11 V supply monitoring |
| Low 70 Ω differential resistance | Maintains regulation stability under ±0.5 mA load transients in feedback divider networks |
| 0.1 μA max reverse leakage at 8.5 V | Preserves accuracy in high-impedance voltage dividers used with microcontroller ADC inputs |
| 210 K/W junction-to-solder-point thermal resistance | Allows 350 mW derated power handling on standard FR4 with 1 cm² cathode pad |
| SOD123 footprint compatibility | Supports automated placement and reflow soldering in space-constrained consumer and industrial PCBs |
Applications
| Industrial Sensor Biasing | Microcontroller Reset Clamping |
|---|---|
|
Use Scenario: Providing stable 11 V reference for bridge sensor excitation in temperature- and pressure-transducer modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix excitation voltage independent of supply ripple. Use Value: 70 Ω rdif limits voltage shift to <±35 mV under ±0.5 mA load variation, preserving measurement linearity. |
Use Scenario: Clamping reset line voltage to prevent false triggering during 12 V system power-up sequencing. IC Role / Device Role / Timing Role: Reverse-biased Zener shunting excess voltage above 11 V to protect MCU reset pin. Use Value: 0.1 μA leakage at 8.5 V avoids loading weak pull-up networks while clamping transients >11.6 V. |
| Power Supply Overvoltage Protection | ADC Reference Stabilization |
|
Use Scenario: Safeguarding downstream 12 V logic rails against input surges in automotive accessory modules. IC Role / Device Role / Timing Role: Shunt element absorbing transient energy above 11.6 V before LDO input stage. Use Value: 590 mW Ptot rating allows 100 ms surge absorption at 11.6 V without thermal runaway on standard FR4. |
Use Scenario: Generating clean 11 V reference for external 12-bit SAR ADC in data acquisition systems. IC Role / Device Role / Timing Role: Low-noise voltage source replacing higher-cost IC references where ±5 % tolerance suffices. Use Value: +5.4 mV/K temperature coefficient enables predictable drift compensation in firmware calibration routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-B11 | ±2 % tolerance, 60 Ω rdif, same SOD123 package | Higher precision required in feedback loops where 11 V stability must hold within ±0.22 V | Select when tighter voltage tolerance justifies premium cost and lower production volume |
| MMBZ5240BLT1G | 11 V nominal, ±5 %, SOT-23 package, 100 Ω rdif, 100 mW Ptot | Lower power handling and larger package thermal resistance limit use to sub-100 mW applications | Choose only if SOT-23 footprint is mandatory and power dissipation remains below 80 mW |
Compared with BZT52-C11X, BZT52-B11 offers tighter tolerance for critical references but at higher unit cost, while MMBZ5240BLT1G sacrifices 83 % of power capability and thermal performance for SOT-23 compatibility-neither is drop-in; layout and thermal design must be revalidated.
Availability
BZT52-C11X is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset clamping, and power supply overvoltage protection requiring stable component supply with non-automotive qualification.
Supply support for BZT52-C11X 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, headquartered in Nijmegen, Netherlands.
The BZT52 series targets general-purpose Zener regulation in cost-sensitive industrial and consumer electronics, emphasizing SMD manufacturability, wide voltage coverage (2.4–75 V), and robust thermal performance in compact packages.
FAQ
Is BZT52-C11X qualified for automotive applications?
No. Per Nexperia Rev. 2 (October 2025) documentation, BZT52-C11X is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia recommends the -Q qualified variants such as BZT52-C11X-Q, which undergo extended temperature cycling, humidity testing, and failure analysis per AEC standards.
What is the maximum continuous reverse current IZ for stable regulation?
The datasheet specifies stable Zener operation at IZ = 5 mA for VZ characterization, with absolute maximum limiting value of 250 mA peak non-repetitive reverse current. For continuous operation, Nexperia recommends staying within 100 mA to maintain junction temperature ≤125 °C on standard FR4 with 1 cm² cathode pad, based on Rth(j-sp) = 210 K/W and Ptot = 590 mW derating curves.
How does the temperature coefficient affect regulation accuracy over –40 °C to +85 °C?
At IZ = 5 mA, BZT52-C11X exhibits +5.4 mV/K typical temperature coefficient. Over –40 °C to +85 °C (125 K span), this produces ≈ ±0.675 V total drift from nominal 11 V, or ±6.1 % full-scale change. This drift is linear and predictable, enabling software-based compensation in closed-loop systems using onboard temperature sensors.
Can BZT52-C11X replace a 1N4740A in existing designs?
Yes, with caveats: both are 11 V Zener diodes, but BZT52-C11X (SOD123, 590 mW) replaces 1N4740A (DO-41, 1 W) only if PCB layout accommodates SMD rework and thermal design accounts for lower power rating. The 1N4740A's higher Ptot and through-hole mechanical robustness remain advantageous in high-vibration or high-heat environments where SOD123 solder joints may fatigue.
BZT52-C11X 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):
- 11 V
- Tolerance:
- ±5.5%
- 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-C11X FAQ
1.How can I place an order for BZT52-C11X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C11X 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-C11X reliable?
The price and inventory of BZT52-C11X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C11X is usually 5 days.
3.What payment methods are accepted for BZT52-C11X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C11X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C11X?
BZT52-C11X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C11X 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-C11X?
For technical support, including BZT52-C11X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C11X requirements.
6.How does Aetrix verify that BZT52-C11X is sourced from the original manufacturer or authorized distributors?
All BZT52-C11X 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-C11X meets industry standards.
7.What is the process for return or replacement of BZT52-C11X?
All BZT52-C11X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C11X, 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-C11X part is unused and in its original packaging.
Return procedure for BZT52-C11X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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