My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J28C-E3/52
- Part No.:
- SMB8J28C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J28C-E3/52.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J28C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V clamping voltage (VC) at 17.6 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMB8J28C-E3/52 datasheet, SMB8J28C-E3/52 pinout, SMB8J28C-E3/52 application, or SMB8J28C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification for automotive use, low thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection against voltage transients induced by ESD, lightning surges, and inductive switching without polarity sensitivity. Its glass-passivated junction ensures stable leakage performance (<1.0 µA at VWM) and fast response time (<1 ns), while the DO-214AA package supports high-power dissipation with low incremental surge resistance.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is qualified to AEC-Q101 for automotive under-hood and infotainment applications. Its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pads per terminal for full 800 W rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 45.4 V at 17.6 A - Clamping voltage limits downstream IC stress during 800 W transient; critical for protecting 3.3 V/5 V logic interfaces. |
| PPPM | 800 W (10/1000 µs) - Peak surge power handling capacity validated on standard 5.0 mm × 5.0 mm copper pads. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor circuits. |
| TJ max. | +150 °C - Enables deployment in high-temperature automotive environments such as engine control units and ADAS modules. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics, including temperature cycling, HTRB, and ESD. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band omitted (bi-directional configuration); matte tin-plated leads compliant with J-STD-002 solderability and JESD22-B102 mechanical shock standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | No polarity marking required; terminals interchangeable-enables single-component protection on AC-coupled or differential lines. |
| Case (body) | Thermal and mechanical interface | Plastic body meets UL 94 V-0 flammability; thermal path relies on copper pad area (minimum 5.0 mm × 5.0 mm per terminal). |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive applications including infotainment head units, body control modules, and ADAS camera interfaces. |
| Glass passivated junction | Ensures stable VBR and low ID over lifetime and temperature extremes, critical for long-term field reliability in industrial sensors. |
| MSL Level 1 rating | Supports standard SMT reflow profiles up to 260 °C peak without moisture-induced damage-no baking required prior to assembly. |
| Low RθJA (72 °C/W) | Allows effective heat dissipation using standard PCB copper; eliminates need for external heatsinks in space-constrained automotive modules. |
Applications
| Automotive Infotainment | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting HDMI, USB, and audio lines in vehicle head units from ESD and load-dump transients. IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector entry point to clamp ±15 kV contact ESD and 100 V/10 ms load dump spikes. Use Value: Prevents latch-up or permanent damage to HDMI transceivers and USB PHYs while maintaining signal integrity up to 3 Gbps. |
Use Scenario: Safeguarding 4–20 mA current-loop sensor outputs in factory automation PLCs exposed to motor switching noise. IC Role / Device Role / Timing Role: TVS shunts inductive kickback from solenoid drivers before it reaches analog front-end amplifiers and ADCs. Use Value: Maintains measurement accuracy by limiting transient overshoot to <45.4 V, preventing ADC saturation and system resets. |
| Telecom Power Input | Automotive Camera Link |
|
Use Scenario: Surge protection on 24 V DC input of PoE-powered telecom switches subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on main DC rail, coordinated with upstream fuse and secondary LC filtering. Use Value: Absorbs 800 W (10/1000 µs) surges without failure, ensuring uninterrupted operation during Category B/C lightning events per IEC 61000-4-5. |
Use Scenario: Protecting MIPI CSI-2 differential pairs in surround-view camera modules from cable discharge events (CDE) and board-level ESD. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed adjacent to connector to minimize stub length and preserve signal rise time. Use Value: Limits clamping voltage to 45.4 V while adding <0.5 pF parasitic capacitance-preserves 1.5 Gbps data rate integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-E3/52 | Same DO-214AA package and bi-directional function, but lower PPPM (600 W vs. 800 W) and higher VC (48.4 V vs. 45.4 V) at rated IPPM. | Less suitable for high-energy 24 V automotive transients; acceptable for lower-risk industrial sensor ports. | Select SMB8J28C-E3/52 when 800 W surge immunity and tighter clamping are required. |
| SMCJ28CAHE3/52 | DO-214AB (SMC) package with higher PPPM (1500 W) and same VWM/VBR, but larger footprint (7.11 mm × 6.22 mm vs. 4.57 mm × 3.94 mm). | Used where board space permits and higher surge margin is needed-e.g., main power entry rather than signal line protection. | Choose SMB8J28C-E3/52 for space-constrained automotive modules requiring AEC-Q101 and compact SMB form factor. |
Compared with SMBJ28CA-E3/52 and SMCJ28CAHE3/52, SMB8J28C-E3/52 delivers superior energy absorption in the smallest qualified package, making it optimal for dense automotive ECUs where layout area and AEC-Q101 compliance are non-negotiable.
Availability
SMB8J28C-E3/52 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, telecom power inputs, and automotive camera links requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J28C-E3/52 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J28C-E3/52 and how is it measured?
The SMB8J28C-E3/52 has a maximum clamping voltage (VC) of 45.4 V, measured at its peak pulse current (IPPM) of 17.6 A under a standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88422, Rev. 12-Nov-12) and reflects worst-case voltage seen by protected circuitry during an 800 W transient event. The SMB8J28C-E3/52 achieves this with low incremental surge resistance, ensuring predictable protection behavior across temperature and lifetime.
Is SMB8J28C-E3/52 RoHS-compliant and lead-free?
Yes, SMB8J28C-E3/52 is RoHS-compliant and lead-free, as confirmed by the "E3" suffix in its part number per Vishay's material categorization policy (www.vishay.com/doc?99912). The matte tin-plated leads meet J-STD-002 solderability requirements and JESD201 Class 1A whisker testing. The molding compound complies with UL 94 V-0 flammability rating, and the entire device conforms to Directive 2011/65/EU. SMB8J28C-E3/52 is suitable for environmentally regulated industrial and automotive production.
Does SMB8J28C-E3/52 require special PCB layout considerations?
Yes, SMB8J28C-E3/52 requires minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve its rated 800 W peak pulse power (PPPM) with 10/1000 µs waveform, as specified in the thermal derating curves (Fig. 2) and mechanical data. Smaller pads reduce thermal dissipation and cause premature failure under surge conditions. Trace inductance must also be minimized-place SMB8J28C-E3/52 directly at the protected port with short, wide traces. The SMB8J28C-E3/52 has no polarity marking, simplifying layout for bi-directional lines.
How does SMB8J28C-E3/52 differ from uni-directional variants like SMB10J28A-E3/52?
SMB8J28C-E3/52 is bi-directional with symmetrical clamping for both polarities, while SMB10J28A-E3/52 is uni-directional and conducts only in reverse bias-requiring correct orientation and offering no protection against positive-going transients on anode-connected lines. SMB8J28C-E3/52 has lower PPPM (800 W vs. 1000 W) and higher clamping voltage (45.4 V vs. 42.1 V) than SMB10J28A-E3/52, but enables simpler layout on AC-coupled or floating lines. Both share DO-214AA packaging and AEC-Q101 qualification, but SMB8J28C-E3/52 is preferred for differential interfaces like CAN or RS-485.
Can SMB8J28C-E3/52 be used in place of SMBJ28CA-E3/52?
SMB8J28C-E3/52 can serve as a higher-performance alternative to SMBJ28CA-E3/52 in most applications, delivering 800 W PPPM versus 600 W and lower clamping voltage (45.4 V vs. 48.4 V) at rated current. However, it is not a drop-in replacement in terms of surge rating-designers must verify that the PCB layout and thermal design support the increased energy absorption. The SMB8J28C-E3/52 maintains identical DO-214AA footprint and soldering profile, so no PCB changes are needed, but system-level surge testing should confirm margin improvement. SMB8J28C-E3/52 is fully compatible with existing SMBJ28CA-E3/52 footprints.
SMB8J28C-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J28C-E3/52 FAQ
1.How can I place an order for SMB8J28C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J28C-E3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB8J28C-E3/52 reliable?
The price and inventory of SMB8J28C-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J28C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J28C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J28C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J28C-E3/52?
SMB8J28C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J28C-E3/52 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB8J28C-E3/52?
For technical support, including SMB8J28C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J28C-E3/52 requirements.
6.How does Aetrix verify that SMB8J28C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J28C-E3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB8J28C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J28C-E3/52?
All SMB8J28C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J28C-E3/52, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB8J28C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J28C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J28C-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
