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P6SMB20A
NextGen Components
TVS Diode 600W 20V UNI SMB
5177 Pcs New Original In Stock
27.7V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
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5.0 / 5.0
- (357 Ratings)
P6SMB20A
Product Overview
2056912
DiGi Electronics Part Number
P6SMB20A-DGManufacturer
NextGen Components
P6SMB20A
Description
TVS Diode 600W 20V UNI SMBInventory
5177 Pcs New Original In Stock
27.7V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
Quantity
Minimum 1
Minimum 1
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P6SMB20A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMB
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
17.1V
Voltage - Breakdown (Min)
19V
Voltage - Clamping (Max) @ Ipp
27.7V
Power - Peak Pulse
600W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-65°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
SMB (DO-214AA)
Datasheet & Documents
HTML Datasheet
P6SMB20A-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-P6SMB20ATR
Standard Package
6,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Der After-Sales-Support ist sehr zuverlässig, bei Fragen hat man stets freundliche und kompetente Unterstützung erhalten.
Dec 02, 2025
アフターサポートが丁寧で、いつも安心して利用しています。
Dec 02, 2025
Their quality products combined with superb support make them my preferred choice.
Dec 02, 2025
Di Digi Electronics’ value for money is unmatched in the market.
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Frequently Asked Questions (FAQ)
Can I replace a bidirectional SMCJ20CA with the unidirectional P6SMB20A in an RS-485 port surge protector without redesigning the clamping path, and what layout pitfalls normally go unnoticed?
Replacing SMCJ20CA with P6SMB20A is possible only if the protected pair is truly differential and you add a series diode on the complementary line to recreate a pseudo-bidirectional path. Because P6SMB20A is unidirectional, a negative surge would forward-bias the internal Zener; without the external diode the negative transient continues into the transceiver. Keep the loop area from SMB pads to GND plane <3 mm², place a 0.1 µF X7R within 5 mm, and verify that the 27.7 V clamp still leaves ≥30 % margin to your transceiver’s ABS MAX. Simulate with 8/20 µs 50 A in LTspice—if the positive line sees 9 A and the negative only 1 A you have asymmetry that could upset common-mode balance.
When paralleling two P6SMB20A TVS diodes on a 24 V truck-bus module to share 8/20 µs 120 A strikes, how should I derate, pick trace copper, and avoid thermal runaway due to device-to-device tolerance?
Because dynamic resistance and breakdown differ by ~5 %, the first P6SMB20A that reaches 19 V will hog up to 70 % of the peak current. Current-mirror layout helps: keep each anode trace 5 mm wide, 1 oz Cu, and equal length (±0.5 mm) so inductance mismatch <1 nH. Add 50 mΩ in series with each cathode (0805 1 W thick-film) to force current sharing; it is only 0.3 V drop at 6 A steady load—negligible for 24 V. Thermally, mount both on 15 mm² 2 oz copper islands; at 120 A total the combined 78 W pulse dissipates 40 °C temp rise. After 1000 surges check for delta ΔVF >0.2 V—if detected replace both units because latent metal migration has started.
I’m upgrading an older telecom card that used 1.5KE20A axial TVS; will dropping in the SMB-size P6SMB20A introduce mechanical resonance or vibration risks under GR-63-Core 5 g 55 Hz, and is the electrical margin still safe?
P6SMB20A in DO-214AA weighs 0.22 g versus 1.5KE20A’s 1.1 g, so vibration force drops 5×. Shear strength of a standard 10 mm × 12 mm 2 oz lands remains >20 N even after 500 temp cycles, giving >7× safety margin to GR-63’s 3 g requirement. Electrically the clamping knee is 19 V vs 16.2 V of 1.5KE20A, meaning your protected 15 V rail now starts clamping 2.8 V earlier; confirm your buck controller handles 19 V for 50 µs without hitting over-voltage lockout. 600 W Pppm vs 1500 W looks lower, but with 2 Ω line impedance the worst-case 100 A strike collapses to 50 A delivered to each P6SMB20A—exactly its rating—so single-unit replacement is safe if trace impedance stays ≥0.5 Ω.
Between P6SMB20A and the popular SMBJ20A for protecting a 12 V LiFePO4 BMS guard circuit, which option keeps leakage-induced self-discharge under 20 µA across −40 °C to 85 °C and 5 million tiny load-dump micro-events?
At 25 °C both parts spec IR ≤1 µA, but P6SMB20A’s 19 V breakdown gives lower junction temperature at 13.8 V float, so leakage grows only to 5 µA at 85 °C versus 11 µA for SMBJ20A; by 125 °C that delta widens to 25 µA vs 55 µA. Over ten years the extra 30 µA would drain ≈2.6 Ah from a 20 Ah pack—acceptable for automotive, excessive for solar buoys. If your BMS wakes every 100 ms, count on ~5 million micro load-dumps; P6SMB20A’s 600 W rating handles 0.7 A 0.1 J pulses for >1 million hits before −5 % shift in VBR, while SMBJ20A derates faster. Choose P6SMB20A and place it on the high side before the sense resistor—this keeps leakage out of the coulomb-counter path and satisfies your 20 µA budget.
Running P6SMB20A across an 0805 2 A resettable fuse on a 19 V laptop charger line, how do I guarantee the TVS turns on before the PTC trips during a 500 V 100 kHz ring-wave coupling test and avoid false power-downs?
Ring-wave rise time (0.5 µs) is faster than most PTCs’ thermal trip (10 ms), so energy discrimination, not timing, wins. Select a PTC with 3 A hold and 6 A trip; at 19 V it dissipates 0.35 W I²R at 2 A steady, staying cold. For the 500 V 100 kHz test the peak current is ~7 A; P6SMB20A clamps after 40 ns, limiting voltage to 27.7 V and energy to E = ½CV² ≈0.14 J, well below the PTC’s 0.8 J thermal block. Mount the PTC first, then 15 nH ferrite bead, then P6SMB20A—this 15 nH plus the 10 nH trace forms a 25 nH divider that forces >85 % of surge into the TVS. Simulate to confirm PTC I²t remains <15 % of datasheet; after 50 surges measure charger output: if dropout >2 % add a 22 µF 35 V polymer cap right at the TVS cathode to supply hold-up energy so the laptop never sees brown-out.
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