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Vishay General Semiconductor - Diodes Division SMB10J28A-E3/5B
- Part No.:
- SMB10J28A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28A-E3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,001
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Product details
Overview
SMB10J28A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal 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 22.0 A peak pulse current (IPPM), and 1000 W peak pulse power (10/1000 µs waveform), suitable for automotive power supply rail protection per AEC-Q101.
For engineers reviewing the SMB10J28A-E3/5B datasheet, SMB10J28A-E3/5B pinout, SMB10J28A-E3/5B application, or SMB10J28A-E3/5B equivalent, key selection criteria include clamping performance under 22 A surge, unidirectional polarity with cathode band marking, RoHS-compliant matte tin terminals, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ps) and low incremental surge resistance. Its unidirectional configuration enables robust forward conduction during overvoltage events while maintaining low leakage (<1.0 µA at 28 V) in normal operation.
The SMB10J28A-E3/5B is rated for TJ = −55 °C to +150 °C, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and is AEC-Q101 qualified - confirming suitability for automotive under-hood and body electronics where thermal cycling and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V automotive systems. |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 45.4 V at 22.0 A (10/1000 µs) - clamped voltage seen by protected IC/MOSFET; limits stress on downstream 48 V tolerant components. |
| PPPM | 1000 W - peak surge power handling capacity; supports ISO 7637-2 Pulse 1/2a/5a transients in vehicle networks. |
| IFSM | 100 A (8.3 ms half-sine) - non-repetitive forward surge rating; accommodates load dump energy without failure. |
| RθJA | 72 °C/W - junction-to-ambient thermal resistance on standard 0.2″ × 0.2″ pads; informs derating above 25 °C ambient. |
| Package | SMB (DO-214AA) - surface-mount outline with 2.20 mm max height; compatible with IPC-7351B footprint and J-STD-002 solderability. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by color band on one end; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Connected to system GND or low-impedance return; must handle full surge current without trace fusing. |
| Cathode | High-side connection to protected line (e.g., 24 V rail or signal) | Marked with color band; ties to input rail; clamps voltage to ≤45.4 V during transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS, and body modules. |
| Glass-passivated junction | Enables stable VBR tolerance and low leakage over lifetime; eliminates risk of junction corrosion in humid environments. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without popcorn cracking or delamination - eliminates pre-baking requirements. |
| Low profile (2.20 mm max height) | Enables compact PCB layouts in space-constrained modules like ECU housings and sensor nodes. |
| RoHS-compliant & halogen-free option available | E3 suffix denotes RoHS compliance; HM3 suffix adds halogen-free molding compound - meets EU ELV and OEM sustainability mandates. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp transients within safe operating area. Use Value: Limits voltage to ≤45.4 V during 22 A surges, preventing damage to upstream MOSFETs and regulator ICs rated for 48 V absolute maximum. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to relay switching noise. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt inductive kickback before it reaches precision DAC or op-amp circuitry. Use Value: Clamps 10/1000 µs transients to 45.4 V with <1 µs response, preserving signal integrity and avoiding ADC saturation or latch-up. |
| Telecom DC Feeder Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feeder lines in outdoor installations. IC Role / Device Role / Timing Role: Primary surge suppression stage before DC-DC isolation; coordinated with secondary TVS and fuse. Use Value: Absorbs up to 1000 W transient energy without degradation, enabling compliance with IEC 61000-4-5 Level 3 (2 kV line-earth). |
Use Scenario: Input-stage surge protection in wall-mounted AC/DC adapters for smart home devices subjected to mains-borne transients. IC Role / Device Role / Timing Role: First-line defense after bridge rectifier, clamping rectified DC bus spikes before bulk capacitor and controller IC. Use Value: Withstands 100 A non-repetitive forward surge (8.3 ms), surviving repeated lightning-induced line surges without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/5B | Same VWM (28 V), identical SMB package, but lower PPPM = 600 W and VC = 45.4 V at 13.2 A. | Lower surge handling suits cost-sensitive consumer applications; insufficient for automotive load dump per ISO 7637-2. | Select SMBJ28A-E3/5B only when peak surge current remains below 13.2 A and AEC-Q101 is not required. |
| SMCJ28A-E3/57 | Same VWM/VBR, but larger SMC (DO-214AB) package, higher PPPM = 1500 W, VC = 45.4 V at 33.0 A. | Higher power rating supports harsher industrial transients; requires larger PCB footprint and different pad layout. | Choose SMCJ28A-E3/57 when system-level testing reveals >22 A surge currents or when extended thermal margin is needed. |
Compared with SMBJ28A-E3/5B, SMB10J28A-E3/5B delivers 67 % higher peak power and AEC-Q101 qualification; versus SMCJ28A-E3/57, it offers identical clamping performance in a 30 % smaller footprint but with reduced surge current headroom.
Availability
SMB10J28A-E3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom DC feeders, and consumer power adapter designs requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB10J28A-E3/5B 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 application-specific performance.
The SMB10JxxA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, automotive-grade transient suppression in space-constrained and thermally demanding environments.
FAQ
What is the clamping voltage of SMB10J28A-E3/5B at its rated peak pulse current?
The SMB10J28A-E3/5B has a maximum clamping voltage (VC) of 45.4 V at 22.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components see no more than 45.4 V during worst-case surge events. The SMB10J28A-E3/5B maintains this clamping performance across its qualified temperature range of −55 °C to +150 °C.
Is SMB10J28A-E3/5B suitable for automotive applications?
Yes, SMB10J28A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and body electronics. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and operation up to +150 °C junction temperature. The SMB10J28A-E3/5B meets requirements for ISO 7637-2 transient immunity in 12 V and 24 V vehicle networks, making it appropriate for ECUs, ADAS modules, and lighting control units.
What does the "E3/5B" suffix indicate in SMB10J28A-E3/5B?
The "E3" suffix denotes RoHS-compliant construction with matte tin-plated leads, while "5B" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3200 units. This format supports high-volume automated SMT assembly. The SMB10J28A-E3/5B is distinct from HE3-suffixed variants, which add AEC-Q101 qualification - though SMB10J28A-E3/5B itself carries that qualification per Vishay documentation.
How does SMB10J28A-E3/5B differ from bidirectional TVS diodes like SMB8J28CA?
The SMB10J28A-E3/5B is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMB8J28CA is bidirectional with no polarity marking. SMB10J28A-E3/5B delivers 1000 W peak power and 22.0 A IPPM, while SMB8J28CA provides 800 W and 17.6 A under the same waveform. The SMB10J28A-E3/5B is optimized for DC rail protection where reverse conduction is undesirable; SMB8J28CA suits AC-coupled or differential signal lines.
What is the thermal resistance of SMB10J28A-E3/5B, and how does it affect layout?
The SMB10J28A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain safe junction temperatures during repetitive surges, designers must ensure adequate copper area and avoid excessive ambient temperature rise. The SMB10J28A-E3/5B datasheet provides derating curves showing power reduction above 25 °C ambient.
SMB10J28A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 22A
- Power - Peak Pulse:
- 1000W (1kW)
- 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)
SMB10J28A-E3/5B FAQ
1.How can I place an order for SMB10J28A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28A-E3/5B 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 SMB10J28A-E3/5B reliable?
The price and inventory of SMB10J28A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J28A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28A-E3/5B?
SMB10J28A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28A-E3/5B 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 SMB10J28A-E3/5B?
For technical support, including SMB10J28A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28A-E3/5B requirements.
6.How does Aetrix verify that SMB10J28A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J28A-E3/5B 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 SMB10J28A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J28A-E3/5B?
All SMB10J28A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28A-E3/5B, 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 SMB10J28A-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J28A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28A-E3/5B Tags
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