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Nexperia USA Inc. BZT52H-C12-QX
- Part No.:
- BZT52H-C12-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C12-QX.pdf
- Description:
- DIODE ZENER 12.05V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,404
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Product details
Overview
BZT52H-C12-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 12 V nominal breakdown voltage at IZ = 5 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-C12-QX datasheet, BZT52H-C12-QX pinout, BZT52H-C12-QX application, or BZT52H-C12-QX equivalent, this part delivers stable 12 V regulation under reverse bias with low differential resistance (90 Ω), tight thermal coefficient control (±0.1 mV/K), and robust surge capability (2.5 A non-repetitive peak reverse current).
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 12 V reference across load variations, with specified test conditions of Tj = 25 °C and IZ = 5 mA. Its differential resistance of 90 Ω ensures minimal output voltage deviation under dynamic current changes.
The device exhibits a temperature coefficient of +6.0 mV/K at IZ = 5 mA, enabling predictable drift compensation in temperature-sensitive circuits. It supports continuous operation up to 150 °C junction temperature and meets AEC-Q101 stress requirements for automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 11.4 V to 12.7 V at IZ = 5 mA - defines regulated output range under standard test conditions |
| Differential Resistance rdif | 90 Ω max - determines output impedance and voltage stability under load transients |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - sets maximum steady-state thermal limit on PCB with 1 cm² cathode pad |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection paths |
| Non-repetitive Peak Reverse Current IZSM | 2.5 A - specifies surge handling capability for transient overvoltage clamping |
| Reverse Current IR | 10 μA max at VR = 9.4 V - quantifies leakage before breakdown onset |
| Junction Temperature Range | −65 °C to +150 °C - enables operation in extended-temperature automotive and industrial environments |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; cathode marked by bar on top surface.
| 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-bias polarity required for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling per discrete semiconductor stress test standard |
| ±5 % voltage tolerance | Enables cost-effective selection where tighter regulation is not required, reducing BOM complexity vs. ±1 % variants |
| 830 mW power rating | Supports higher-current regulation tasks than standard 500 mW Zeners without requiring heatsinking on standard FR4 PCB |
| SOD123F footprint | Compatible with automated SMT assembly and reflow soldering; occupies 2.8 × 4.4 mm PCB area with 1.2 mm pad spacing |
| Low thermal resistance | Rth(j-sp) = 70 K/W to cathode solder point - improves thermal response during short-duration surges |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 12 V reference for microcontroller ADC inputs monitoring battery voltage and lamp status. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to clamp and regulate analog input rail. Use Value: Maintains <±1 % reference accuracy across −40 °C to +125 °C ambient, meeting ASIL-B functional safety signal integrity requirements. |
Use Scenario: Biasing precision op-amp stages in 4–20 mA transmitter circuits for pressure and temperature sensors. IC Role / Device Role / Timing Role: Low-noise voltage reference source establishing fixed gain-setting node for instrumentation amplifier feedback network. Use Value: Delivers 12 V reference with <90 Ω dynamic impedance, minimizing gain error drift due to supply variation in loop-powered designs. |
| Consumer Power Adapter Feedback | Telecom Line Card Overvoltage Protection |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback path, regulating TL431 reference input voltage. Use Value: Enables accurate 12 V output regulation with ±5 % tolerance compatible with typical adapter output spec of 12 V ±5 %. |
Use Scenario: Clamping transient surges on 12 V bias rails in DSL line interface cards exposed to lightning-induced EFT. IC Role / Device Role / Timing Role: Fast-response overvoltage protector absorbing 2.5 A non-repetitive surges without degradation. Use Value: Limits rail excursion to <15 V during 100 μs surges, protecting downstream PHY ICs rated for 13.2 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B12-Q | ±2 % tolerance (11.8–12.2 V), lower rdif (70 Ω), same SOD123F package | Better regulation stability for precision feedback loops; higher cost | Select when <±25 mV output variation is required at IZ = 5 mA |
| MMBZ5242B-7-F | ±5 % tolerance (11.4–12.6 V), 350 mW Ptot, SOT-23 package | Lower power handling; smaller footprint but reduced thermal margin | Choose for space-constrained consumer boards where 350 mW suffices and AEC-Q101 is not mandated |
Compared with BZT52H-C12-QX, the BZT52H-B12-Q offers tighter regulation at higher cost, while MMBZ5242B-7-F trades AEC-Q101 compliance and 830 mW thermal capacity for compactness-making the C12-QX optimal for automotive and industrial 12 V rail stabilization where reliability and power margin are critical.
Availability
BZT52H-C12-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and telecom line card protection requiring stable component supply with AEC-Q101 assurance and long-term production continuity.
Supply support for BZT52H-C12-QX 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, reliable components for automotive, industrial, and consumer markets, with leadership in logic, discretes, and MOSFETs.
The BZT52H-Q series targets automotive voltage regulation and reference needs, designed specifically to meet AEC-Q101 requirements while offering wide voltage coverage (2.4–75 V) and multiple tolerance grades in compact SMD packages.
FAQ
What is the maximum continuous reverse current this Zener can handle at 12 V regulation?
The BZT52H-C12-QX is rated for continuous operation at IZ = 5 mA under standard conditions, with maximum steady-state current limited by thermal design. At Tamb = 25 °C on a 1 cm² cathode pad, it supports up to ~65 mA before reaching 830 mW dissipation limit, assuming VZ ≈ 12 V. Derating is required above 25 °C ambient per Rth(j-a) = 150 K/W.
Does this part support reflow soldering, and what profile is recommended?
Yes-BZT52H-C12-QX is qualified for lead-free reflow soldering only, per Nexperia's SOD123F footprint guidelines. The recommended profile uses peak temperature of 260 °C for ≤ 30 seconds, with ramp-up rate ≤ 3 °C/s and cooling rate ≥ 1 °C/s. Reflow must follow JEDEC J-STD-020 moisture sensitivity level 1 requirements.
How does the +6.0 mV/K temperature coefficient affect circuit performance?
The +6.0 mV/K coefficient means output voltage increases by ~0.72 V over a 120 °C junction range (25 °C to 145 °C). In automotive BCM applications, this drift is compensated via system-level calibration or paired with negative-TC components. It is significantly lower than older Zener families, improving mid-range thermal stability.
Can this Zener be used in parallel for higher power dissipation?
No-parallel connection is not recommended due to mismatched VZ tolerances (±5 %) causing current hogging and thermal runaway. For >830 mW needs, use a single higher-rated Zener (e.g., BZX84-C12) or implement active regulation. Derating individual devices below 50 % of rated power is advised for long-term reliability.
BZT52H-C12-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12.05 V
- Tolerance:
- ±5.39%
- Power - Max:
- 375 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-C12-QX FAQ
1.How can I place an order for BZT52H-C12-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C12-QX 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 BZT52H-C12-QX reliable?
The price and inventory of BZT52H-C12-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-C12-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C12-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C12-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C12-QX?
BZT52H-C12-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C12-QX 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 BZT52H-C12-QX?
For technical support, including BZT52H-C12-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C12-QX requirements.
6.How does Aetrix verify that BZT52H-C12-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C12-QX 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 BZT52H-C12-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C12-QX?
All BZT52H-C12-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C12-QX, 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 BZT52H-C12-QX part is unused and in its original packaging.
Return procedure for BZT52H-C12-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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