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ZY12
Diotec Semiconductor
ZENERDIODE,DO-41,12V,2W,5%
99620 Pcs New Original In Stock
Zener Diode 12 V 2 W ±5% Through Hole DO-41/DO-204AC
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5.0 / 5.0
- (449 Ratings)
ZY12
Product Overview
12944222
DiGi Electronics Part Number
ZY12-DGManufacturer
Diotec Semiconductor
ZY12
Description
ZENERDIODE,DO-41,12V,2W,5%Inventory
99620 Pcs New Original In Stock
Zener Diode 12 V 2 W ±5% Through Hole DO-41/DO-204AC
Quantity
Minimum 1
Minimum 1
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ZY12 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Strip
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
12 V
Tolerance
±5%
Power - Max
2 W
Impedance (Max) (Zzt)
4 Ohms
Current - Reverse Leakage @ Vr
1 µA @ 7 V
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Through Hole
Package / Case
DO-204AC, DO-41, Axial
Supplier Device Package
DO-41/DO-204AC
Datasheet & Documents
Datasheets
Download ZY12 Product Specification (PDF)
HTML Datasheet
ZY12-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Additional Information
Other Names
2721-ZY12
Standard Package
30
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
迪基電子的配送服務值得讚賞，準時且包裝完整，真是值得推薦。
Dec 02, 2025
Je suis entièrement satisfait de leur respect des délais et de la qualité de l'emballage.
Dec 02, 2025
スタッフの対応が親切で、困ったときもすぐに解決策を提示してくれる点が気に入っています。
Dec 02, 2025
The value I get for my money with DiGi Electronics is unmatched.
Dec 02, 2025
The product feels premium, and the delivery was impressively quick.
Dec 02, 2025
Quick shipment, and their after-sales team resolved my issue within minutes. Very satisfied.
Dec 02, 2025
Their customer service team is truly top-notch—friendly, patient, and always willing to help find the perfect solution for any tech needs.
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Frequently Asked Questions (FAQ)
Can the ZY12 Zener diode from Diotec Semiconductor handle transient overvoltage events in automotive applications without failing prematurely?
Yes, the ZY12 Zener diode can be used in automotive overvoltage protection circuits, but with careful design considerations. While the ZY12 is rated for 12 V ±5% and 2 W maximum power, transient events may exceed this rating momentarily. To avoid premature failure, always pair the ZY12 with a series current-limiting resistor sized to clamp peak power dissipation below 2 W during expected transients. Additionally, ensure PCB layout includes adequate thermal relief to improve heat dissipation during repeated pulse events. For high-energy transients (e.g., load dump), consider using a TVS diode upstream to limit stress on the ZY12.
How does the dynamic impedance of the ZY12 compare to the BZX85C12 in feedback regulation circuits, and is it suitable for precision voltage references?
The ZY12 has a maximum Zzt (impedance) of 4 Ohms, which is comparable to the BZX85C12, making both suitable for moderate-precision regulation. However, in precision voltage feedback loops (e.g., SMPS controllers), the ZY12’s ±5% tolerance and impedance variation with current can introduce regulation errors under light or variable loads. For stable performance, operate the ZY12 at 5–10 mA (not near the knee current), and consider using it in buffered configurations with an op-amp if tighter regulation is needed. For higher precision, consider alternatives like the LM4040, but the ZY12 remains a cost-effective solution for non-critical feedback sensing.
Is the ZY12 an acceptable drop-in replacement for the 1N4742A in 12V regulation circuits, and are there any reliability risks?
The ZY12 can serve as a functional replacement for the 1N4742A in 12V applications since both are DO-41 packaged 12V ±5% 1W–2W Zener diodes. However, note that the ZY12 is rated for 2W while the 1N4742A is typically 1W, so ensure power dissipation is derated appropriately with temperature—the ZY12 must be operated below 2W, especially above 50°C ambient. Also verify the ZY12’s lower Zzt (4Ω max) doesn’t cause instability in older designs tuned for higher impedance. For long-term reliability, ensure sufficient heatsinking or PCB copper area to manage thermal stress, particularly in enclosed environments.
What are the risks of using the ZY12 in parallel to increase power handling, and how can thermal runaway be prevented?
Connecting ZY12 diodes in parallel to increase power capability is generally not recommended due to mismatched Zener voltages and temperature coefficients. Even within the ±5% tolerance (11.4V to 12.6V), one ZY12 may conduct earlier and hog current, leading to thermal runaway. If higher power is required, use a single higher-wattage Zener (e.g., 5W devices in DO-15 or stud mount) or design an active shunt regulator with a transistor. If parallel use is unavoidable, include small ballast resistors (e.g., 0.5–1Ω) in series with each ZY12 to balance current and monitor temperature in situ during validation.
Can the ZY12 be used effectively for ESD protection in industrial I/O modules, and how does it compare to dedicated TVS diodes like the SMAJ12A?
The ZY12 can absorb limited ESD energy but is not optimized for high-speed ESD or EFT protection like dedicated TVS diodes. While it has a fast response compared to thermal fuses, its 2W rating limits its ability to handle repetitive or high-peak ESD events (e.g., IEC 61000-4-2). The SMAJ12A, rated for 400W peak pulse, offers superior clamping and lower clamping voltage under surge. Use the ZY12 only in low-risk, low-frequency ESD scenarios with current limiting. For robust industrial I/O, always prefer TVS diodes like the SMAJ12A, and reserve the ZY12 for steady-state voltage regulation or as a secondary safeguard.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ZY12 CAD Models
Diotec Semiconductor ZY12 PCB symbols & footprints
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