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1SMA58AT3
onsemi
TVS DIODE 58VWM 93.6VC SMA
4123 Pcs New Original In Stock
93.6V Clamp 4.3A Ipp Tvs Diode Surface Mount SMA
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5.0 / 5.0
- (150 Ratings)
1SMA58AT3
Product Overview
7745873
DiGi Electronics Part Number
1SMA58AT3-DGManufacturer
onsemi
1SMA58AT3
Description
TVS DIODE 58VWM 93.6VC SMAInventory
4123 Pcs New Original In Stock
93.6V Clamp 4.3A Ipp Tvs Diode Surface Mount SMA
Quantity
Minimum 1
Minimum 1
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1SMA58AT3 Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
-
Product Status
Obsolete
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
58V
Voltage - Breakdown (Min)
64.4V
Voltage - Clamping (Max) @ Ipp
93.6V
Current - Peak Pulse (10/1000µs)
4.3A
Power - Peak Pulse
400W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
225pF @ 1MHz
Operating Temperature
-65°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AC, SMA
Supplier Device Package
SMA
Base Product Number
1SMA58
Datasheet & Documents
HTML Datasheet
1SMA58AT3-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Standard Package
5,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
항상 친근한 서비스와 저렴한 가격 덕분에 다시 찾게 되는 곳입니다.
December 02, 2025
Customer feedback confirms the outstanding quality of their electronics.
December 02, 2025
I appreciate their transparent pricing, which helps me make informed purchasing decisions.
December 02, 2025
Their commitment to quality is evident in every interaction; I highly recommend Di Digi Electronics.
December 02, 2025
I trust DiGi Electronics to deliver promptly and package carefully.
December 02, 2025
Their fast shipping and friendly service make shopping a pleasure.
December 02, 2025
The packaging thoroughly protected the contents, showing attention to detail.
December 02, 2025
Outstanding product craftsmanship, showing attention to detail and quality.
December 02, 2025
I've been impressed by their proactive approach to after-sales support, offering guidance even after the transaction.
December 02, 2025
Their well-stocked inventory ensures minimal downtime for our operations.
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Frequently Asked Questions (FAQ)
Can the 1SMA58AT3 be used as a direct replacement for SMAJ58A in a high-temperature industrial power supply design, and what are the key risks?
While the 1SMA58AT3 and SMAJ58A share similar voltage ratings (58V reverse standoff, ~93.6V clamping), the 1SMA58AT3 is marked as obsolete, posing long-term supply chain risks for production. Additionally, the 1SMA58AT3 is RoHS non-compliant, which may violate environmental regulations in new designs. In high-temperature environments near 125°C, both devices operate within -65°C to 150°C junction range, but the 1SMA58AT3's higher clamping impedance may lead to elevated transient voltage overshoot under fast surges. Always verify surge robustness with 10/1000µs pulse testing in-circuit when substituting, and consider SMAJ58E3/TR13 as a more sustainable alternative.
What design-in challenges arise when using the 1SMA58AT3 in a high-frequency noise environment due to its 225pF capacitance at 1MHz?
The 1SMA58AT3's relatively high capacitance of 225pF at 1MHz can distort high-speed signals or attenuate fast digital edges if used on data lines—despite being intended for general-purpose protection. In mixed-signal or communication circuits (e.g., CAN, RS-485), this capacitance may cause signal integrity issues like jitter or rise time degradation. Always isolate the 1SMA58AT3 to low-bandwidth power rails, and avoid placement on signal paths unless the system bandwidth is below 100kHz. For signal line protection, consider lower-capacitance TVS diodes like SM4T68AY (<10pF) instead.
How does the peak pulse power rating of 400W in the 1SMA58AT3 translate into real-world surge protection for a 24V DC power input stage?
The 400W rating of the 1SMA58AT3 is specified under the 10/1000µs waveform, meaning it can handle up to 4.3A transient current with clamping at 93.6V. However, for a 24V system, this implies a large overvoltage margin—acceptable for rare, high-energy transients like load dump in industrial settings—but inefficient for frequent low-energy spikes. The 1SMA58AT3 may degrade over time if exposed to repetitive surges below its clamping threshold due to partial conduction. Designers should add a series current-limiting element or use staged protection (e.g., PTC + MOV) to reduce stress on the 1SMA58AT3 in continuously noisy environments.
Is the DO-214AC (SMA) package of the 1SMA58AT3 reliable for reflow assembly in high-volume manufacturing, and any thermal concerns?
The 1SMA58AT3 uses the DO-214AC (SMA) package with MSL Level 1 (unlimited floor life), making it robust for standard reflow processes. However, due to its thermal mass and surface-mount nature, ensure solder profile adheres to onsemi's recommended peak temperature (typically 260°C max) to avoid thermal shock or solder joint voiding. In high-power dissipation scenarios, the SMA package lacks a thermal pad, so sustained power events may lead to localized PCB overheating. Improve reliability by using thermal relief traces and avoiding placement near other heat sources on the board.
What are the reliability risks of using the obsolete 1SMA58AT3 in a new medical device design expecting 10+ years of service?
Using the obsolete 1SMA58AT3 in a long-lifecycle medical device introduces significant obsolescence risk—onsemi no longer guarantees availability, increasing potential for costly redesigns mid-production. Cross-reference substitutes like TV04A580J-HF or SMAJ58E3/TR13 that offer similar clamping performance with active product status and RoHS compliance. Additionally, verify long-term reliability through accelerated life testing (e.g., HTOL at 125°C) due to the 1SMA58AT3's Zener-type degradation mechanism under repeated surge stress. For medical applications, prefer components with documented qualification data and full traceability to mitigate field failure risks.
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.
1SMA58AT3 CAD Models
onsemi 1SMA58AT3 PCB symbols & footprints
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