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ZM4744A-GS18
Vishay General Semiconductor - Diodes Division
DIODE ZENER 15V 1W DO213AB
10398 Pcs New Original In Stock
Zener Diode 15 V 1 W ±5% Surface Mount DO-213AB
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5.0 / 5.0
- (377 Ratings)
ZM4744A-GS18
Product Overview
12786905
DiGi Electronics Part Number
ZM4744A-GS18-DGManufacturer
Vishay General Semiconductor - Diodes Division
ZM4744A-GS18
Description
DIODE ZENER 15V 1W DO213ABInventory
10398 Pcs New Original In Stock
Zener Diode 15 V 1 W ±5% Surface Mount DO-213AB
Quantity
Minimum 1
Minimum 1
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ZM4744A-GS18 Technical Specifications
Category
Diodes, Zener, Single Zener Diodes
Packaging
Cut Tape (CT)
Series
-
Product Status
Active
Voltage - Zener (Nom) (Vz)
15 V
Tolerance
±5%
Power - Max
1 W
Impedance (Max) (Zzt)
14 Ohms
Current - Reverse Leakage @ Vr
5 µA @ 11.4 V
Operating Temperature
175°C
Grade
Automotive
Qualification
AEC-Q101
Mounting Type
Surface Mount
Package / Case
DO-213AB, MELF (Glass)
Supplier Device Package
DO-213AB
Base Product Number
ZM4744
Datasheet & Documents
HTML Datasheet
ZM4744A-GS18-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0050
Additional Information
Other Names
ZM4744A-GS18-DG
112-ZM4744A-GS18DKRINACTIVE
112-ZM4744A-GS18DKR
ZM4744AGS18
ZM4744A-GS18GICT
112-ZM4744A-GS18DKR-DG
ZM4744A-GS18GITR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Das Engagement für Kundenzufriedenheit bei DiGi Electronics ist deutlich sichtbar.
Dec 02, 2025
Der Support ist immer hilfsbereit, egal wann ich eine Frage habe.
Dec 02, 2025
Tracking my shipments has never been easier thanks to their system.
Dec 02, 2025
Shipping was faster than I anticipated, which was a pleasant surprise!
Dec 02, 2025
The consistency in product quality keeps me coming back for more.
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Frequently Asked Questions (FAQ)
Can the ZM4744A-GS18 be used as a direct replacement for the BZX84C15L in a 12V automotive power supply clamping circuit, and what are the key risks to evaluate during substitution?
While both the ZM4744A-GS18 (15V, 1W, DO-213AB) and BZX84C15L (15V, 0.3W, SOT-23) share the same nominal Zener voltage, they are not drop-in replacements due to significant differences in power rating, package thermal performance, and leakage current. The ZM4744A-GS18’s 1W capability and DO-213AB MELF package provide superior surge handling and thermal dissipation—critical in automotive environments—but require more PCB area and careful layout for heat spreading. Additionally, the ZM4744A-GS18 has a higher reverse leakage current (5 µA @ 11.4V vs. typically <1 µA for BZX84C15L), which may affect low-power standby modes. Always verify transient energy absorption requirements and ensure the PCB copper pour can support the MELF package’s thermal demands to avoid premature failure under load dumps or load spikes.
What design considerations should I account for when using the ZM4744A-GS18 in a high-vibration automotive environment, given its DO-213AB MELF package?
The DO-213AB MELF package used by the ZM4744A-GS18 offers excellent moisture resistance and thermal cycling performance, but its cylindrical shape increases susceptibility to mechanical stress in high-vibration settings like engine compartments. To mitigate risk, avoid placing the component near board edges or overhanging areas, and ensure adequate solder fillet formation on both terminations. Use conformal coating to reduce micro-crack propagation from thermal-mechanical fatigue, and consider anchoring with underfill if subjected to sustained shock >50G. Unlike flat-pack SMD diodes, MELF devices benefit from slightly larger pad geometries to improve mechanical retention—follow Vishay’s recommended land pattern precisely to prevent tombstoning or lift-off during thermal cycling.
How does the ZM4744A-GS18 compare to the ON Semiconductor MMSZ5244B (15V, 0.5W, SOD-123) for overvoltage protection in a 48V mild-hybrid system, and when would one be preferred over the other?
The ZM4744A-GS18 is better suited for high-energy transient suppression in 48V systems due to its 1W power rating and AEC-Q101 automotive qualification, whereas the MMSZ5244B (0.5W, SOD-123) lacks sufficient surge capability for ISO 7637-2 load dump pulses. The ZM4744A-GS18 can handle repeated 100ms transients up to ~60V with proper derating, while the MMSZ5244B would likely fail under similar conditions. However, if space is extremely constrained and transient energy is managed externally (e.g., with a TVS upstream), the MMSZ5244B may suffice for low-power signal clamping. For primary protection in power rails, always prefer the ZM4744A-GS18—its lower dynamic impedance (14Ω max) also ensures tighter voltage regulation during fast transients.
Is it safe to parallel two ZM4744A-GS18 diodes to increase current handling in a voltage reference application, and what derating rules apply?
Paralleling ZM4744A-GS18 diodes is strongly discouraged due to inherent parameter mismatch in Zener voltage (±5% tolerance) and negative temperature coefficient near 15V, which promotes current hogging and thermal runaway. Even with matched bins, uneven PCB thermal coupling can cause one diode to carry disproportionately more current, leading to localized overheating and premature failure. Instead of paralleling, select a single higher-power Zener such as the Vishay ZM4750A (20V, 5W) or use an active regulator. If you must parallel, include individual series resistors (e.g., 10–22Ω, 1W) to force current sharing—but this reduces regulation accuracy and increases dropout voltage, negating the benefits in precision applications.
What are the long-term reliability implications of operating the ZM4744A-GS18 near its maximum junction temperature of 175°C in an under-hood automotive module?
Operating the ZM4744A-GS18 continuously near 175°C drastically accelerates degradation mechanisms such as dopant diffusion and glass seal fatigue in the DO-213AB package, potentially leading to increased leakage current or open-circuit failure over time. While AEC-Q101 qualification ensures robustness, best practice is to keep the junction temperature below 125°C for >15-year field life. Use a thermal via array beneath the cathode pad and connect to an internal ground plane to improve heat sinking. Monitor ambient temperature at the component location—not just the module inlet—and apply a 20–30% power derating above 105°C ambient. Consider adding a small heatsink or relocating the diode away from hot components like MOSFETs or inductors to extend service life in harsh environments.
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.
ZM4744A-GS18 CAD Models
Vishay General Semiconductor - Diodes Division ZM4744A-GS18 PCB symbols & footprints
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