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SMDB12C
SMC Diode Solutions
TVS DIODE 12VWM 19VC 8-SO
999128 Pcs New Original In Stock
19V Clamp 1A Ipp Tvs Diode Surface Mount 8-SO
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5.0 / 5.0
- (221 Ratings)
SMDB12C
Product Overview
7960101
DiGi Electronics Part Number
SMDB12C-DGManufacturer
SMC Diode Solutions
SMDB12C
Description
TVS DIODE 12VWM 19VC 8-SOInventory
999128 Pcs New Original In Stock
19V Clamp 1A Ipp Tvs Diode Surface Mount 8-SO
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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SMDB12C Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Type
Zener
Bidirectional Channels
4
Voltage - Reverse Standoff (Typ)
12V (Max)
Voltage - Breakdown (Min)
13.3V
Voltage - Clamping (Max) @ Ipp
19V
Current - Peak Pulse (10/1000µs)
1A
Power - Peak Pulse
500W
Power Line Protection
No
Applications
General Purpose
Capacitance @ Frequency
94pF @ 1MHz
Operating Temperature
-55°C ~ 125°C (TJ)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SO
Base Product Number
SMDB12
Datasheet & Documents
Datasheets
Download SMDB12C Product Specification (PDF)
HTML Datasheet
SMDB12C-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
1655-1983-2-DG
-1655-1983-1-DG
-1765-SMDB12CCT
1655-1983-1-DG
-1765-SMDB12CDKR
1655-1983-1
1655-SMDB12CCT
SMDB12CTR-DG
1655-1983-2
1655-1983-6
SMDB12CTR
-1655-1983-1
-1655-1983-6-DG
1655-SMDB12CDKR
1655-1983-6-DG
1655-SMDB12CTR
-1655-1983-6
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
항상 합리적인 가격과 친환경 포장에 감사드려요. 또 찾을게요.
de desembre 02, 2025
La rapidité d'expédition m'a vraiment impressionné, et leur équipe support est très à l'écoute.
de desembre 02, 2025
配送が非常に早く、商品も素晴らしかったです。アフターサービスも丁寧で感謝しています。
de desembre 02, 2025
I appreciate their transparent approach, which makes my shopping experience straightforward.
de desembre 02, 2025
Their prompt and attentive after-sales support keeps us coming back.
de desembre 02, 2025
DiGi Electronics excels in providing high-quality products with swift dispatch.
de desembre 02, 2025
The website is incredibly user-friendly, making it easy to navigate through different categories and find what I need quickly.
de desembre 02, 2025
Always well-stocked and ready to serve, making our procurement process efficient.
de desembre 02, 2025
The packaging was professional and effective, and the product’s long-lasting build is impressive.
de desembre 02, 2025
After-sales support from DiGi Electronics has exceeded my expectations every time.
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Frequently Asked Questions (FAQ)
How does the SMDB12C compare to the Littelfuse SP3022-04HTG for protecting a 12V automotive sensor interface against load dump transients?
The SMDB12C offers a tighter clamping voltage (19V max at 1A) compared to the SP3022-04HTG (24.4V at 1A), making it better suited for sensitive 12V automotive electronics where lower stress on downstream ICs is critical. However, the SP3022-04HTG handles higher peak pulse power (600W vs. 500W) and has lower capacitance (0.9pF vs. 94pF), which may be preferable in high-speed signal lines. For general-purpose 12V sensor interfaces with moderate data rates, the SMDB12C provides superior voltage clamping and sufficient surge protection, but avoid it in high-frequency communication buses due to its relatively high parasitic capacitance.
Can the SMDB12C safely replace a unidirectional TVS like the Vishay SMAJ12A in a 12V industrial control power rail, and what are the risks?
Yes, the SMDB12C can replace the SMAJ12A in a 12V industrial power rail, but with important caveats: the SMDB12C is bidirectional and will conduct during both positive and negative transients, while the SMAJ12A is unidirectional and only clamps positive surges. This means the SMDB12C may introduce unintended negative-voltage conduction during fast ESD events, potentially stressing ground-referenced circuitry. Additionally, the SMDB12C’s 94pF capacitance is significantly higher than the SMAJ12A’s (~500pF but optimized for power lines), which is usually acceptable for power rails but could affect ripple or feedback stability in sensitive regulators. Verify system-level ESD and surge response before full deployment.
What layout and grounding practices are critical when using the SMDB12C in a 4-channel RS-485 protection scheme to avoid signal integrity issues?
When using the SMDB12C for RS-485 protection, minimize loop area by placing the device as close as possible to the connector, with short, direct traces to the protected lines and a solid ground pour connected to the system ground plane via multiple vias. Due to its 94pF per channel capacitance, the SMDB12C can attenuate high-speed RS-485 signals (e.g., above 10Mbps); consider series termination resistors (e.g., 22Ω) to dampen reflections. Avoid routing protected lines over splits in the ground plane. For multi-channel designs, ensure symmetrical layout across all four bidirectional channels to maintain common-mode noise rejection and prevent skew-induced errors.
Is the SMDB12C suitable for long-term reliability in outdoor IoT gateways exposed to temperature cycling from -40°C to 105°C, and how does its MSL rating impact assembly?
The SMDB12C is rated for junction temperatures from -55°C to 125°C, making it technically suitable for outdoor IoT gateways operating in -40°C to 105°C ambient conditions, provided proper PCB thermal design is implemented. However, long-term reliability under repeated thermal cycling depends on solder joint integrity—use a robust solder paste (e.g., SAC305) and avoid mechanical stress near the 8-SO package. With an MSL 1 (unlimited floor life) rating, the device requires no baking before reflow, simplifying high-volume assembly and reducing handling risks compared to moisture-sensitive alternatives. Still, follow IPC-J-STD-033 guidelines if stored in humid environments prior to use.
How does the SMDB12C perform in a hot-swap 12V backplane application compared to a crowbar circuit using a thyristor-based protector like the STMicroelectronics Trisil™ SM12-4?
The SMDB12C provides fast, solid-state clamping (nanosecond response) ideal for protecting against ESD and short-duration surges in hot-swap 12V backplanes, but it cannot handle sustained overvoltage or high-energy faults like a Trisil-based crowbar circuit. The SM12-4 can shunt hundreds of amps during sustained overvoltage by latching into a low-impedance state, while the SMDB12C will fail short if subjected to prolonged overload beyond its 500W peak pulse rating. Use the SMDB12C for transient suppression on signal or low-power power lines, but pair it with a fuse or current-limiting circuit for fault isolation. For high-energy hot-swap scenarios, a hybrid approach—SMDB12C for fast transients plus a Trisil for sustained faults—offers optimal protection.
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.
SMDB12C CAD Models
SMC Diode Solutions SMDB12C PCB symbols & footprints
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