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BZT52B15
Diotec Semiconductor
ZENERDIODE,SOD-123,15V,0.5W,2%
137217 Pcs New Original In Stock
Zener Diode 15 V 500 mW ±2% Surface Mount SOD-123F
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5.0 / 5.0
- (404 Ratings)
BZT52B15
Product Overview
12944843
DiGi Electronics Part Number
BZT52B15-DGManufacturer
Diotec Semiconductor
BZT52B15
Description
ZENERDIODE,SOD-123,15V,0.5W,2%Inventory
137217 Pcs New Original In Stock
Zener Diode 15 V 500 mW ±2% Surface Mount SOD-123F
Quantity
Minimum 1
Minimum 1
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BZT52B15 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Strip
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
15 V
Tolerance
±2%
Power - Max
500 mW
Impedance (Max) (Zzt)
42 Ohms
Current - Reverse Leakage @ Vr
100 nA @ 10 V
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
SOD-123F
Supplier Device Package
SOD-123F
Datasheet & Documents
HTML Datasheet
BZT52B15-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Additional Information
Other Names
2721-BZT52B15
Standard Package
30
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
在庫状況も安定しており、必要なときにすぐに対応してもらえる点が非常に良いです。
грудня 02, 2025
Fast shipping process, my order arrived ahead of schedule.
грудня 02, 2025
The team at DiGi Electronics is always ready to assist after purchase, ensuring smooth operation.
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Frequently Asked Questions (FAQ)
When designing a 15V voltage reference circuit for a low-power sensor interface, can the BZT52B15 Zener diode be reliably used instead of a precision shunt reference like the TL431, and what are the key trade-offs in stability and noise performance?
The BZT52B15 can serve as a cost-effective 15V reference in non-critical applications, but it lacks the tight regulation and low dynamic impedance of a TL431. Unlike the TL431, which offers ±0.5% initial accuracy and active feedback, the BZT52B15’s ±2% tolerance and 42Ω Zzt make it sensitive to load and line variations. For sensor interfaces requiring stable biasing, this may introduce measurable offset drift—especially over temperature (-50°C to 150°C). Use the BZT52B15 only when absolute accuracy isn’t critical and power budget is tight; otherwise, prefer a dedicated reference IC for better long-term stability and lower noise.
Can the BZT52B15 safely replace a BZX84C15L in an existing SOD-123 footprint design without requiring PCB or thermal management changes?
Yes, the BZT52B15 is a direct functional and mechanical replacement for the BZX84C15L in most 15V, 500mW applications. Both share the SOD-123F package, similar Zener voltage (15V ±2%), and comparable power ratings. However, verify reverse leakage current: the BZT52B15 specifies 100nA @ 10V, while the BZX84C15L typically shows lower leakage (~50nA). In high-impedance circuits (e.g., analog front-ends), this difference could affect baseline current draw. Thermal performance is nearly identical due to matching package and power rating, so no heatsinking or layout changes are needed—but always validate under worst-case ambient temperatures.
What are the risks of using the BZT52B15 in a 12V automotive rail protection circuit where load dump transients may exceed 40V for hundreds of milliseconds?
Using the BZT52B15 alone for load dump protection on a 12V automotive rail is risky. While its 15V Zener voltage seems suitable for clamping, the 500mW power rating is insufficient to absorb the energy from ISO 7637-2 load dump pulses (which can deliver >100J). Without a series current-limiting resistor or TVS diode upstream, the BZT52B15 will likely fail short-circuit during transient events. For reliable protection, pair it with a high-energy TVS (e.g., SMAJ15A) or use a dedicated automotive Zener array rated for pulse power >5W. The BZT52B15 may survive brief overvoltage if properly current-limited, but it’s not designed for standalone surge suppression.
In a battery-powered IoT node operating from 3.3V to 18V input, how does the BZT52B15’s reverse leakage current impact overall system quiescent current, and is it suitable for always-on voltage monitoring?
At 100nA @ 10V reverse voltage, the BZT52B15 contributes minimally to quiescent current—less than 0.1µA when biased below its 15V threshold—making it acceptable for low-power IoT designs. However, above 10V, leakage increases exponentially; near the 15V knee, it can rise to several microamps, potentially affecting ultra-low-power sleep modes. If your monitoring circuit draws nanoamp-level standby current, consider whether this leakage accumulates across multiple protection diodes. For always-on clamping or regulation above 12V, the BZT52B15 is viable, but avoid stacking multiple units in parallel without leakage matching, as imbalance can cause thermal runaway in high-temperature environments.
How does the BZT52B15 perform under repeated thermal cycling between -40°C and +125°C in an industrial motor drive application, and what derating practices should be applied to ensure long-term reliability?
The BZT52B15 is rated for -50°C to +150°C junction temperature, but repeated thermal cycling in motor drives induces mechanical stress due to CTE mismatch between the die and SOD-123F package. To ensure reliability, derate power dissipation to ≤60% of 500mW (i.e., ≤300mW) when operating above 100°C ambient. Also, avoid placing the BZT52B15 near high-heat sources like MOSFETs or inductors without adequate copper pour for heat spreading. Solder joint fatigue is a known failure mode in such environments—consider conformal coating and avoid sharp thermal gradients. For mission-critical systems, monitor long-term drift in Zener voltage, as repeated stress can shift the knee characteristic by 1–2%, degrading regulation accuracy over time.
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BZT52B15 CAD Models
Diotec Semiconductor BZT52B15 PCB symbols & footprints
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