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Nexperia USA Inc. BZT52H-C68-QX
- Part No.:
- BZT52H-C68-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C68-QX.pdf
- Description:
- DIODE ZENER 68V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
BZT52H-C68-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 68 V nominal breakdown voltage at IZ = 2 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation.
For engineers reviewing the BZT52H-C68-QX datasheet, BZT52H-C68-QX pinout, BZT52H-C68-QX application, or BZT52H-C68-QX equivalent, this part supports precision biasing, overvoltage clamping, and reference stabilization in space-constrained automotive ECUs, ADAS sensor interfaces, and body control modules where thermal robustness and production-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its differential resistance of 400 Ω at IZ = 2 mA and temperature coefficient of +0.05 mV/K (typical) ensure low dynamic impedance and minimal drift over temperature.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it delivers 830 mW power handling at Tamb ≤ 25 °C and withstands non-repetitive peak reverse currents up to 0.25 A (tp = 100 μs), making it suitable for transient suppression in 12 V/24 V automotive supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 64.0 V to 72.0 V at IZ = 2 mA - defines clamping threshold for overvoltage protection circuits |
| Tolerance | ±5 % - enables cost-optimized selection for non-critical reference applications without trimming |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC or average pulsed power in PCB-mounted configuration |
| Differential Resistance rdif | 400 Ω max at IZ = 2 mA - determines output impedance and regulation error under load variation |
| Reverse Current IR | 160 μA max at VR = 54.4 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Junction Temperature Tj | −65 °C to +150 °C - supports operation in under-hood automotive environments with high thermal cycling stress |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD HBM ≥ 2 kV |
Pinout & Package
SOD123F plastic surface-mount package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.4–3.6 mm × 2.5–2.7 mm × 1.0–1.2 mm; optimized for reflow soldering on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; reverse-bias anode-to-cathode voltage triggers Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per stress test requirements including temperature cycling, humidity bias, and ESD |
| Three tolerance grades | ±1 %, ±2 %, and ±5 % options - allows trade-off between precision and cost across design tiers |
| Wide voltage range | 2.4 V to 75 V (E24 series) - covers most automotive and industrial supply rail monitoring needs |
| Low thermal resistance | Rth(j-sp) = 70 K/W - enables efficient heat transfer from junction to cathode solder point on PCB |
| Small footprint | SOD123F package - occupies < 10 mm² board area, compatible with high-density layout constraints |
Applications
| Engine Control Unit (ECU) Voltage Reference | ADAS Camera Module Bias Supply |
|---|---|
Use Scenario: Provides stable 68 V reference for analog front-end comparators monitoring battery voltage surges in 24 V diesel engine ECUs. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to clamp and stabilize comparator input thresholds. Use Value: Maintains ±5 % regulation accuracy across −40 °C to +125 °C ambient, enabling reliable overvoltage detection without external trimming. |
Use Scenario: Supplies bias voltage to image sensor analog circuitry in rear-view camera modules exposed to vehicle electrical noise. IC Role / Device Role / Timing Role: Low-leakage voltage regulator maintaining clean 68 V rail for CCD/CMOS sensor analog blocks. Use Value: Limits reverse current to ≤160 μA at 54.4 V, minimizing standby power draw while rejecting transients via 0.25 A surge rating. |
| Body Control Module (BCM) Clamping Diode | Automotive Infotainment Power Sequencing |
Use Scenario: Protects LIN bus transceiver inputs from load-dump spikes in door module BCMs using 12 V supply rails. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced surges above 68 V before they reach sensitive IC inputs. Use Value: Withstands 40 W non-repetitive peak power (tp = 100 μs), absorbing energy without failure during ISO 7637-2 pulse 5a events. |
Use Scenario: Enables controlled power-up sequencing of display backlight drivers and audio amplifiers in head unit designs. IC Role / Device Role / Timing Role: Precision Zener element in RC-based delay network setting turn-on timing thresholds. Use Value: Temperature coefficient of +0.05 mV/K ensures < 0.5 % drift over full operating range, preserving sequence timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B68-Q | ±2 % tolerance, 66.6 V–69.4 V VZ range, 80 Ω rdif | Higher precision needed for feedback loops in switching regulators | Select when tighter voltage stability outweighs cost sensitivity |
| BZX84-C68 | SOT23 package, 64.6 V–71.4 V VZ, 500 mW Ptot, no AEC-Q101 | Consumer-grade portable electronics with lower reliability requirements | Choose only for non-automotive designs where smaller size compensates for reduced power and qualification |
Compared with BZT52H-C68-QX, the BZT52H-B68-Q offers improved regulation accuracy at higher cost and lower surge margin, while BZX84-C68 sacrifices automotive qualification and thermal performance for footprint reduction-making the C-grade part optimal for cost-sensitive, AEC-compliant 68 V clamping.
Availability
BZT52H-C68-QX is available at Aetrix Electronics and suitable for automotive electronic control units, ADAS camera modules, and body control modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for BZT52H-C68-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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions with strong automotive and industrial market presence.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, clamping, and reference applications demanding robust thermal performance and long-term supply stability.
FAQ
What is the maximum continuous reverse current this diode can handle at 25 °C ambient?
The BZT52H-C68-QX has a maximum total power dissipation of 830 mW at Tamb ≤ 25 °C. At its 68 V breakdown voltage, this corresponds to a maximum continuous reverse current of approximately 12.2 mA (830 mW ÷ 68 V). Exceeding this value risks thermal runaway unless derated per ambient temperature curve.
How does the ±5 % tolerance affect circuit design compared to tighter-tolerance variants?
The ±5 % tolerance means the actual VZ falls between 64.0 V and 72.0 V at IZ = 2 mA. Designers must ensure downstream circuitry (e.g., comparator thresholds or regulator feedback dividers) accommodates this 8 V window, typically by adding margin to trip points or selecting components with wider input ranges.
Can this diode be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients at higher voltages and mismatched characteristics; paralleling BZT52H-C68-QX units causes current hogging and thermal instability. For higher power, use a single higher-rated device or implement active current-sharing circuitry.
Is the SOD123F package compatible with standard reflow profiles for lead-free assembly?
Yes-the SOD123F package is qualified for lead-free reflow soldering per J-STD-020. The recommended profile includes peak temperature ≤ 260 °C, time above liquidus 60–150 s, and ramp rates within 3 °C/s, matching IPC-A-610 Class 2/3 requirements for automotive production.
BZT52H-C68-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):
- 68 V
- Tolerance:
- ±5.88%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 160 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-C68-QX FAQ
1.How can I place an order for BZT52H-C68-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C68-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-C68-QX reliable?
The price and inventory of BZT52H-C68-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-C68-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C68-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C68-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C68-QX?
BZT52H-C68-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C68-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-C68-QX?
For technical support, including BZT52H-C68-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C68-QX requirements.
6.How does Aetrix verify that BZT52H-C68-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C68-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-C68-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C68-QX?
All BZT52H-C68-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C68-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-C68-QX part is unused and in its original packaging.
Return procedure for BZT52H-C68-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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