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P4SMA170CA
NextGen Components
TVS Diode 400W 170V BI SMA
26258 Pcs New Original In Stock
234V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (133 Ratings)
P4SMA170CA
Product Overview
2052786
DiGi Electronics Part Number
P4SMA170CA-DGManufacturer
NextGen Components
P4SMA170CA
Description
TVS Diode 400W 170V BI SMAInventory
26258 Pcs New Original In Stock
234V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA170CA 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)
145V
Voltage - Breakdown (Min)
162V
Voltage - Clamping (Max) @ Ipp
234V
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
P4SMA170CA-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-P4SMA170CATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Ich schätze die ökologische Verpackungspolitik sehr und war begeistert, wie schnell meine Bestellung ankam.
Dec 02, 2025
Their pricing advantages are clear—excellent value for products that maintain high standards every time.
Dec 02, 2025
Fast shipping helps me respond quickly to project deadlines and troubleshooting.
Dec 02, 2025
I've received exceptional after-sales support that exceeded my expectations.
Dec 02, 2025
Their logistics team is highly professional, enabling seamless order fulfillment.
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Frequently Asked Questions (FAQ)
Can the P4SMA170CA TVS diode safely protect a 150V DC industrial bus from inductive load switching transients, and what layout considerations are critical to avoid failure?
Yes, the P4SMA170CA is suitable for protecting 150V DC buses due to its 145V reverse standoff voltage and 162V minimum breakdown, providing adequate margin. However, during inductive kick events, ensure the peak pulse power (400W) is not exceeded—verify transient duration and energy using Ipp vs. time curves. Critical layout practices include placing the P4SMA170CA as close as possible to the protected node, using short, wide traces to minimize parasitic inductance, and connecting the ground pad directly to a low-impedance ground plane. Failure to follow these guidelines can result in voltage overshoot beyond the 234V clamp level due to inductive ringing.
Is the P4SMA170CA a drop-in replacement for the Littelfuse SMAJ170CA in a 24V automotive auxiliary circuit, and what reliability risks should I evaluate?
While both the P4SMA170CA and SMAJ170CA share similar electrical characteristics (170V standoff, SMA package), they are not guaranteed drop-in replacements without validation. Key differences may exist in surge performance, leakage current, and long-term reliability under thermal cycling. The P4SMA170CA’s operating temperature range (-50°C to 150°C) meets automotive requirements, but verify its qualification for AEC-Q101 if used in under-hood applications. Additionally, compare third-party test data for ESD and load dump robustness—using an unqualified substitute could lead to premature failure in harsh automotive environments.
How does the P4SMA170CA perform in bidirectional surge protection for RS-485 communication lines exposed to IEC 61000-4-5 surges, and what series impedance is needed to limit current?
The P4SMA170CA can protect RS-485 lines bidirectionally, but its 234V clamping voltage is relatively high for sensitive transceiver ICs (typically rated for ±15V). To ensure survival, use series current-limiting resistors (e.g., 22–47Ω) between the TVS and transceiver to reduce peak current and dissipate energy. Without sufficient series impedance, the residual voltage during an 8/20µs surge may exceed the transceiver’s absolute maximum ratings. Always validate the full protection scheme with actual surge testing, as relying solely on the P4SMA170CA without current limiting significantly increases risk of downstream damage.
What are the long-term reliability concerns when using the P4SMA170CA in high-humidity outdoor enclosures, and how does its MSL rating impact assembly?
Although the P4SMA170CA has an MSL 1 (unlimited floor life) rating, indicating excellent moisture resistance, long-term reliability in high-humidity outdoor environments depends on PCB assembly quality and conformal coating. Solder joint integrity under thermal cycling (-50°C to 150°C) can degrade if improper reflow profiles are used or if voids exist under the SMA package. To mitigate risk, follow IPC-J-STD-020 guidelines for reflow, avoid moisture exposure before baking if rework is needed, and apply hydrophobic conformal coating to prevent electrochemical migration. Neglecting these steps may lead to latent failures months after deployment.
Can I parallel two P4SMA170CA diodes to increase surge handling capability in a 400W solar inverter input stage, and what are the trade-offs?
Paralleling two P4SMA170CA diodes is not recommended due to inherent parameter mismatch in breakdown voltage and dynamic resistance, which causes uneven current sharing during transients. One diode may absorb significantly more energy, leading to premature failure despite the combined theoretical 800W rating. Instead, select a single higher-power TVS (e.g., 600W or 1500W SMC-packaged device) rated for the same voltage class. If space constraints force parallel use, add small series resistors (0.5–1Ω) to balance current, but this increases clamping voltage and reduces effectiveness. This approach introduces complexity and reliability risk—opting for a properly rated single device is the safer, more robust solution.
Quality Assurance (QC)
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P4SMA170CA CAD Models
NextGen Components P4SMA170CA PCB symbols & footprints
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