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P4SMA440A
NextGen Components
TVS Diode 400W 440V UNI SMA
65216 Pcs New Original In Stock
602V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (146 Ratings)
P4SMA440A
Product Overview
2053231
DiGi Electronics Part Number
P4SMA440A-DGManufacturer
NextGen Components
P4SMA440A
Description
TVS Diode 400W 440V UNI SMAInventory
65216 Pcs New Original In Stock
602V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA440A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMA
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
376V
Voltage - Breakdown (Min)
418V
Voltage - Clamping (Max) @ Ipp
602V
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
P4SMA440A-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-P4SMA440ATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Der Versand erfolgte unglaublich schnell, meine Bestellung wurde bereits nach kurzer Zeit zuverlässig geliefert.
грудня 02, 2025
Prompt delivery and excellent communication made this a great experience.
грудня 02, 2025
I am always satisfied with the performance of their products.
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Frequently Asked Questions (FAQ)
When should I pick the P4SMA440A instead of the popular SMAJ440A for 440 V transient protection in a compact PoE++ PD board?
Choose P4SMA440A when your layout is tight on the 48 V input and you need the extra 67 V stand-off margin (376 V vs 440 V) to survive an intermittent 500 V ring-wave test without forward biasing the PD bridge. The SMAJ440A clamps 12 % lower (≈ 530 V) but only offers a 440 V stand-off, so on 48 V lines it risks leakage creep at high temperature. Trade-off: P4SMA440A’s 602 V max clamp is 70 V higher, so verify your downstream 650 V-rated MOSFET still survives. If your PHY is only 350 V tolerant, stay with SMAJ440A and add a secondary clamp instead.
Can I replace two parallel 1.5 KES440CA bidirectional TVS in a 380 Vdc bus surge protector with a single unidirectional P4SMA440A to save board space, or will I lose UL 1449 Type-5 compliance?
No— substituting one P4SMA440A for two 1.5 KES440CA will cost you bidirectional clamping and 300 A surge head-room. The P4SMA440A is unidirectional; on negative transients the diode’s 376 V stand-off disappears and the full negative spike lands on your bus capacitor, raising 1500 µF-ripple and risking MLCC cracking. If your HVAC controller never sees reversed polarity, you can still parallel two P4SMA440A cathode-up on the same pads, doubling Ipp to 8 A 10/1000 µs, but then derate 20 % below 150 °C to keep within DO-214AC power density. For UL 1449, keep at least one 1.5 KES440CA on the line side as the bidirectional witness.
If my solar optimizer sits at 125 °C ambient in a sealed enclosure, how many 400 W pulses can the P4SMA440A take before I have to oversize it or add a TVS array?
At 125 °C, the P4SMA440A’s 400 W rating derates to 120 W (0.3 %/°C above 25 °C). A 4 kV 1.2/50 µs coupling into 50 Ω gives ≈10 A for 60 µs (0.3 J). 120 W / 60 µs ≈ 7 kW equivalent, so one pulse is safe, but repetitive pulses every 2 s during EMC burst test accumulate 3 J after 10 strokes. After 200 strokes the junction exceeds 200 °C and drifting of VBR begins. Mitigation: move to a P6KA440A (600 W) in SMB package, or place a 2 Ω metal-strip in series with the P4SMA440A to split 30 % of the energy into the resistor; this keeps Tj < 175 °C and lifetime > 3 k strokes (Telcordia GR-1089).
Will the P4SMA440A clamp low enough to protect the 650 V CoolMOS IPA60R190P6 in a motor VFD, or should I step down to SMAJ400A for tighter clamp margin?
The P4SMA440A worst-case 602 V clamp at Ipp is only 48 V under the IPA60R190P6 absolute-max VDS; at cold temperature the MOSFET can handle 650 V + 5 % = 682 V, giving 80 V head-room. However, if your VFD sees regenerative 600 V bus over-shoot plus 40 V inductive ringing, the margin drops to 42 V—within measurement tolerance. Rule-of-thumb: keep ≥1.3× safety factor on VDS. Possible fixes are: (1) insert 1 µH series inductance to slow the front, shaving 50 V; or (2) stack two P4SMA440A in series (total DO-214AC footprint 2 × 3.9 mm) and double clamp to ≈ 500 V with a cost adder <$0.28. Only if cost is critical, drop to SMAJ400A with 540 V clamp—then derate your bus from 570 V to 500 V to stay within 650 V MOSFET rating.
Can I factory hand-solder the P4SMA440A on an FR-4 panel after the SMA pick-and-place wave even though it is MSL-1 unlimited, or will localized pad lifting occur above 270 °C?
True—MSL-1 allows infinite floor life, but hand-solder iron tips at 370 °C locally exceed the 260 °C JEDEC peak, risking pad lift on 0.8 mm thin boards. Keep tip at 320 °C and dwell ≤3 s on each DO-214AC pad. Add 5 mm thermal bridges (dummy trace) to S-pad so the heat sink effect is shared; this keeps ΔT across the P4SMA440A < 40 °C, avoiding die micro-cracks that lower surge threshold by 15 %. Post-rework, perform a 100 A 10/1000 µs surge sample on three boards; if breakdown jumps above 630 V, replace—junction damage has started.
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P4SMA440A CAD Models
NextGen Components P4SMA440A PCB symbols & footprints
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