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SA70A-E3/54
Vishay General Semiconductor - Diodes Division
TVS DIODE 70VWM 113VC DO204AC
3866 Pcs New Original In Stock
113V Clamp 4.4A Ipp Tvs Diode Through Hole DO-204AC (DO-15)
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SA70A-E3/54
Product Overview
985339
DiGi Electronics Part Number
SA70A-E3/54-DGManufacturer
Vishay General Semiconductor - Diodes Division
SA70A-E3/54
Description
TVS DIODE 70VWM 113VC DO204ACInventory
3866 Pcs New Original In Stock
113V Clamp 4.4A Ipp Tvs Diode Through Hole DO-204AC (DO-15)
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Quantity
Minimum 1
Minimum 1
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SA70A-E3/54 Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
TransZorb®
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
70V
Voltage - Breakdown (Min)
77.8V
Voltage - Clamping (Max) @ Ipp
113V
Current - Peak Pulse (10/1000µs)
4.4A
Power - Peak Pulse
500W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
-
Operating Temperature
-55°C ~ 175°C (TJ)
Mounting Type
Through Hole
Package / Case
DO-204AC, DO-15, Axial
Supplier Device Package
DO-204AC (DO-15)
Base Product Number
SA70
Datasheet & Documents
HTML Datasheet
SA70A-E3/54-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Standard Package
4,000
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
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UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
服務和品質都非常棒，物流速度快，讓我非常感動！
de desembre 02, 2025
Les services après-vente de DiGi Electronics sont parmi les meilleurs que j'ai rencontrés, toujours professionnel et cordial.
de desembre 02, 2025
Les produits de DiGi Electronics sont très fiables, je peux compter sur eux pour une utilisation quotidienne sans souci.
de desembre 02, 2025
Overall, their friendly attitude and fast logistics impressed me greatly.
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Frequently Asked Questions (FAQ)
When designing in the SA70A-E3/54 for industrial power supply protection, what are the key risks related to its clamping voltage exceeding typical 70V bus rails, and how can I mitigate potential downstream component stress?
The SA70A-E3/54 has a max clamping voltage of 113V at 4.4A peak pulse current, which significantly exceeds the 70V reverse standoff rating. In 70V nominal systems, transient events may clamp above safe limits for downstream ICs rated near 80V. To mitigate risk, verify worst-case clamping behavior under expected surge conditions (e.g., ISO 7637-2) and consider cascading a lower-voltage TVS or using a series current-limiting element to reduce peak let-through voltage. Always simulate or test under real fault conditions to ensure downstream components remain within their SOA when the SA70A-E3/54 activates.
How does the SA70A-E3/54 compare to the P6KE82A in high-temperature environments like automotive underhood applications, and is it safe to substitute one for the other?
Both the SA70A-E3/54 and P6KE82A are DO-15 through-hole TVS diodes, but key differences affect interchangeability. The SA70A-E3/54 is rated for 70V standoff with a 113V clamping voltage, while the P6KE82A has an 82V standoff and ~137V clamping—better suited for 72–75V systems. Substituting the P6KE82A for the SA70A-E3/54 risks delayed triggering during transients on 70V rails, leaving components underprotected. For designs near 70V, SA70A-E3/54 offers tighter protection margin. Always check the system's voltage tolerance during transients and confirm the replacement provides adequate headroom without premature conduction, especially at elevated temperatures where Zener voltages can drift.
What are the thermal design considerations when using the SA70A-E3/54 in a densely packed through-hole PCB with limited airflow, and how does sustained repetitive pulsing affect long-term reliability?
The SA70A-E3/54 is rated for 500W peak pulse power (10/1000µs), but its thermal performance in real layouts depends on PCB copper area and ventilation. In confined or high-ambient-temperature environments (>85°C), repetitive surges may cause thermal buildup due to limited heat dissipation from axial leads. To ensure reliability, use generous copper traces as heatsinks (≥0.5 in²), avoid placing near other heat sources, and limit surge repetition rate. Derate maximum pulse current by 50% or more under high ambient conditions. Consider transient event frequency in your application—if surges occur more than a few times per minute, evaluate active cooling or a higher-power TVS like a SMAJ series in parallel with proper layout.
Can the SA70A-E3/54 be used effectively for ESD protection in communication ports, or is it better suited for bulk transient suppression, and why?
The SA70A-E3/54 is optimized for bulk transient protection (e.g., load dump, inductive spikes), not high-frequency ESD events. With no specified capacitance, it likely has relatively high junction capacitance (typically >100pF for DO-15 devices), which can distort high-speed signals and degrade performance in data lines. For ESD protection on communication ports like RS-485 or CAN, prefer low-capacitance surface-mount TVS diodes such as the SMAJ or SMC series. Use the SA70A-E3/54 only on DC power lines where signal integrity isn’t a concern, ensuring it complements—not replaces—dedicated ESD protection on data paths.
What are the reliability risks of using the SA70A-E3/54 in a high-humidity environment without conformal coating, and how does its DO-204AC package affect long-term performance?
The SA70A-E3/54 uses a DO-204AC (DO-15) axial glass package that, while hermetically sealed, remains vulnerable to surface leakage and tracking in humid or contaminated environments. Moisture ingress across the package surface—especially between leads—can cause leakage current increases or premature breakdown. Although the SA70A-E3/54 has an MSL-1 rating and no moisture sensitivity, long-term exposure to humidity without conformal coating may compromise reliability in outdoor or industrial settings. To mitigate, apply conformal coating over the assembled board, maintain proper creepage distances (>2.5mm for 100V), and avoid flux residues during assembly. For harsh environments, consider adding a protective silicone sleeve or preferring molded epoxy TVS diodes with better environmental resistance.
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SA70A-E3/54 CAD Models
Vishay General Semiconductor - Diodes Division SA70A-E3/54 PCB symbols & footprints
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