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Taiwan Semiconductor Corporation SMB10J28CAH
- Part No.:
- SMB10J28CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28CAH.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,757
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Product details
Overview
SMB10J28CAH from Taiwan Semiconductor is a bidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 28V stand-off voltage (VWM), 31.1–34.4V breakdown voltage (VBR @ 1mA), and 45.4V clamping voltage (VC @ 22.0A). It delivers AEC-Q101 qualification, ISO 7637-2 compliance, and 175°C max junction temperature for automotive-grade ESD and load-dump protection.
For engineers reviewing the SMB10J28CAH datasheet, SMB10J28CAH pinout, SMB10J28CAH application, or SMB10J28CAH equivalent, key selection criteria include bidirectional clamping capability, 1000W peak pulse power rating, DO-214AA mechanical compatibility, and compliance with automotive transients (Pulse 1/2a/2b/3a/3b).
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection of data lines and power rails against fast-rising transients without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1µA @ 28V), while sub-1ps response time guarantees suppression before sensitive ICs experience overstress.
The device is thermally rated for 20°C/W junction-to-lead resistance and 100°C/W junction-to-ambient resistance, supporting continuous operation up to 5W steady-state dissipation. Its DO-214AA package meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 31.1 V / 34.4 V @ 1 mA - Confirmed breakdown range ensuring reliable turn-on under transient stress |
| VC @ IPPM | 45.4 V @ 22.0 A - Clamped voltage during 10/1000µs surge, limiting downstream voltage stress |
| PPK | 1000 W - Peak pulse power handling per IEC 61000-4-5 and ISO 7637-2 Pulse 5a |
| TJ max | +175 °C - Enables under-hood automotive deployment without thermal derating concerns |
| Configuration | Bidirectional - Symmetric clamping for AC-coupled or floating signal lines |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; leads are matte tin-plated and solderable per J-STD-002. Polarity is non-applicable for bidirectional operation, but physical orientation follows standard SMB cathode-band convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Transient current path terminal | Marked band denotes conventional cathode; bidirectional conduction renders either terminal functionally identical during surge events |
| Leads (both) | Thermal and electrical interface | Low RθJL (20°C/W) enables efficient heat transfer to PCB copper; JESD201 Class 2 whisker resistance ensures long-term solder joint reliability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test conditions including HTOL, TCT, and ESD-HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance transients) |
| Glass-passivated junction | Ensures ±5% VBR tolerance stability over life and immunity to humidity-induced parameter drift |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without floor-life constraints |
Applications
| Automotive Infotainment Power Rails | Industrial CAN Bus Transceivers |
|---|---|
Use Scenario: Protecting 12V supply inputs of head unit MCUs and display drivers from battery line transients during load dump or jump-start events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC-DC converters and LDOs to limit input voltage excursion. Use Value: 45.4V clamping at 22A prevents overvoltage damage to 3.3V/5V logic supplies; AEC-Q101 qualification ensures field reliability. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD and coupled transients in factory automation nodes. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across differential bus lines to shunt fast transients without distorting signal integrity. Use Value: Sub-1ps response preserves CAN FD bit timing; bidirectional symmetry avoids polarity-dependent installation errors. |
| LED Headlamp Driver Circuits | Smart Sensor Signal Conditioning |
Use Scenario: Shielding buck controller ICs and MOSFET gate drivers in adaptive LED lighting modules from inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from relay coil de-energization and motor commutation spikes. Use Value: 1000W peak power rating handles repetitive 8.3ms surges up to 100A IFSM without degradation. | Use Scenario: Protecting analog front-end amplifiers and ADC inputs in automotive pressure/temperature sensors exposed to harness coupling. IC Role / Device Role / Timing Role: Low-leakage (≤1µA @ 28V) clamp minimizing offset error in precision signal paths. Use Value: Stable VBR (31.1–34.4V) ensures predictable turn-on margin above 24V system rail, avoiding false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | Same DO-214AA package, 28V VWM, but rated at 600W PPK and higher VC (48.4V @ 12.3A) | Limited to lower-energy transients; insufficient for ISO 7637-2 Pulse 5a compliance | Select SMB10J28CAH when 1000W surge handling and automotive load-dump immunity are required |
| SMCJ28CA | DO-214AB (SMC) package, same 28V VWM and 1000W rating, but larger footprint and 25.5°C/W RθJA | Higher thermal mass but incompatible with SMB land patterns; requires PCB redesign | Choose SMB10J28CAH for space-constrained layouts where DO-214AA footprint is fixed |
Compared with SMBJ28CA and SMCJ28CA, SMB10J28CAH uniquely combines 1000W surge capacity, DO-214AA form factor, and AEC-Q101/ISO 7637-2 certification-enabling drop-in replacement in automotive power domains without layout or thermal redesign.
Availability
SMB10J28CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial CAN networks, and LED lighting control requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SMB10J28CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMB10JxxCAH series was engineered specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems, emphasizing robustness against load dump, ESD, and ISO 7637-2 pulses.
FAQ
What does the 'CAH' suffix indicate in SMB10J28CAH?
The 'CAH' suffix in SMB10J28CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). This distinguishes it from unidirectional variants (e.g., 'AH') and confirms compliance with automotive reliability and environmental standards. The SMB10J28CAH uses symmetric junction design to clamp transients regardless of polarity.
Is SMB10J28CAH compatible with standard DO-214AA (SMB) footprints?
Yes, SMB10J28CAH uses the DO-214AA (SMB) package with standardized dimensions and pad layout per manufacturer datasheet. Its lead pitch, body length, and thermal pad requirements match IPC-7351B SMB recommendations, enabling direct placement on existing SMB land patterns without modification.
What is the maximum clamping voltage of SMB10J28CAH under surge conditions?
The SMB10J28CAH has a maximum clamping voltage (VC) of 45.4 V at 22.0 A peak pulse current (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, providing predictable overvoltage protection for downstream 3.3V, 5V, and 12V ICs in automotive and industrial applications.
Does SMB10J28CAH meet ISO 7637-2 for automotive transient immunity?
Yes, SMB10J28CAH is explicitly validated to meet ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance transients). This is confirmed in the official Taiwan Semiconductor datasheet Version A2102 and supported by AEC-Q101 qualification testing.
What is the junction-to-lead thermal resistance (RθJL) of SMB10J28CAH?
The SMB10J28CAH has a typical junction-to-lead thermal resistance (RθJL) of 20°C/W, measured per JEDEC standards. This low value enables efficient heat transfer from the silicon die to the PCB copper via the SMB package leads, supporting sustained 5W power dissipation and high-reliability operation at +175°C junction temperature.
SMB10J28CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J28CAH FAQ
1.How can I place an order for SMB10J28CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28CAH 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 SMB10J28CAH reliable?
The price and inventory of SMB10J28CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28CAH is usually 5 days.
3.What payment methods are accepted for SMB10J28CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28CAH?
SMB10J28CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28CAH 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 SMB10J28CAH?
For technical support, including SMB10J28CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28CAH requirements.
6.How does Aetrix verify that SMB10J28CAH is sourced from the original manufacturer or authorized distributors?
All SMB10J28CAH 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 SMB10J28CAH meets industry standards.
7.What is the process for return or replacement of SMB10J28CAH?
All SMB10J28CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28CAH, 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 SMB10J28CAH part is unused and in its original packaging.
Return procedure for SMB10J28CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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