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P4SMA91CA
NextGen Components
TVS Diode 400W 91V BI SMA
22741 Pcs New Original In Stock
125V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (407 Ratings)
P4SMA91CA
Product Overview
2053374
DiGi Electronics Part Number
P4SMA91CA-DGManufacturer
NextGen Components
P4SMA91CA
Description
TVS Diode 400W 91V BI SMAInventory
22741 Pcs New Original In Stock
125V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA91CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMA
Product Status
Active
Type
Zener
Bidirectional Channels
1
Voltage - Reverse Standoff (Typ)
77.8V
Voltage - Breakdown (Min)
86.5V
Voltage - Clamping (Max) @ Ipp
125V
Power - Peak Pulse
400W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AC, SMA
Supplier Device Package
DO-214AC, SMA
Datasheet & Documents
HTML Datasheet
P4SMA91CA-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
3372-P4SMA91CATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
包裝細緻，物流快捷，讓我每次都能高興地收到商品。
Dec 02, 2025
Une expérience client excellente grâce à leur livraison précise et leur emballage soigné.
Dec 02, 2025
The precision and care in manufacturing ensure high-quality outcomes.
Dec 02, 2025
Their products consistently deliver on both affordability and dependability.
Dec 02, 2025
Their ability to maintain high stock levels across product categories is truly commendable.
Dec 02, 2025
DiGi Electronics' logistics team handled my delivery with great care and efficiency.
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Frequently Asked Questions (FAQ)
What are the key design risks when using the P4SMA91CA for transient protection in high-temperature environments near 150°C?
When using the P4SMA91CA in high-temperature environments up to 150°C, the primary design risk is reduced clamping performance and accelerated aging due to sustained thermal stress. Although the device is rated for -50°C to 150°C (TJ), prolonged operation above 125°C can degrade long-term reliability, especially under repetitive ESD or surge events. To mitigate risk, ensure adequate PCB heat dissipation through copper pours and thermal vias, and avoid placing the P4SMA91CA near heat-generating components. Monitor junction temperature with thermal simulation tools and consider derating the peak pulse power below 400W at elevated temperatures to maintain robust protection.
How does the P4SMA91CA compare to the SMAJ91CA in terms of clamping voltage and surge handling for board-level ESD protection?
The P4SMA91CA and SMAJ91CA both offer 91V operating voltage and ~125V clamping at Ipp, but the P4SMA91CA typically exhibits tighter breakdown voltage tolerance and lower dynamic resistance, resulting in slightly faster response and reduced clamping voltage during fast transients. In practical design-in scenarios, this makes the P4SMA91CA preferable for sensitive downstream ICs where lower transient overshoot is critical. However, ensure that PCB layout symmetry and trace inductance are minimized to fully realize this advantage, as poor layout can negate superior device performance.
Can the P4SMA91CA be used as a direct replacement for the P6SMB91CA in an existing 400W transient protection circuit without redesign?
Replacing the P6SMB91CA with the P4SMA91CA requires careful review despite similar electrical ratings. The P4SMA91CA uses a DO-214AC (SMA) package versus DO-214B (SMB) in the P6SMB91CA, resulting in a smaller footprint and lower thermal mass. This reduces power dissipation capability under repeated surges, increasing risk of thermal runaway in high-duty-cycle transient environments. If replacement is necessary, validate via thermal imaging under worst-case surge conditions (e.g., multiple IEC 61000-4-4 bursts) and consider derating the P4SMA91CA's peak pulse current by 20–30% compared to the P6SMB91CA.
What are the critical layout considerations when integrating the P4SMA91CA into a compact PCB with tight space constraints?
When integrating the P4SMA91CA in space-constrained designs, maintain short, direct traces between the protected line and ground to minimize inductance, which can cause voltage overshoot during fast transients like ESD. Avoid vias in the current path and use a solid ground plane beneath the DO-214AC footprint to enhance thermal and electrical performance. Ensure minimum creepage and clearance distances (per IPC-2221) are maintained, especially in industrial environments. Use thermal relief pads only if necessary for hand soldering, but prefer full copper connection for better heat dissipation during surge events.
Under what conditions might the P4SMA91CA fail short-circuit, and how can system reliability be improved in mission-critical applications?
The P4SMA91CA may fail short-circuit under sustained over-voltage conditions beyond its 400W peak pulse rating or due to thermal overstress from inadequate PCB heat sinking. In mission-critical systems, this failure mode can lead to system downtime or damage to upstream components. To improve reliability, pair the P4SMA91CA with a series current-limiting element (e.g., a polyfuse or current-sensing circuit) to isolate the TVS during fault conditions. Additionally, include transient event monitoring or diagnostic routines to detect early degradation, and use a redundant protection scheme in high-surge-risk applications such as industrial communication ports or outdoor sensor interfaces.
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.
P4SMA91CA CAD Models
NextGen Components P4SMA91CA PCB symbols & footprints
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