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Vishay General Semiconductor - Diodes Division SMBJ8.0CA-M3/52
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- Part No.:
- SMBJ8.0CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CA-M3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
SMBJ8.0CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 6.4 V minimum breakdown voltage (VBR), 8.0 V maximum stand-off voltage (VWM), 13.6 V clamping voltage (VC) at 44.1 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ8.0CA-M3/52 datasheet, SMBJ8.0CA-M3/52 pinout, SMBJ8.0CA-M3/52 application, or SMBJ8.0CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.7), halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with RθJA = 100 °C/W and RθJL = 20 °C/W. The device meets MSL level 1 per J-STD-020 and is rated for 260 °C lead-free reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.4 V / 7.25 V at 10 mA test current - defines reliable conduction onset under surge conditions |
| VWM | 8.0 V - maximum continuous reverse voltage before significant leakage (≤1.0 µA) |
| VC @ IPPM | 13.6 V at 44.1 A - clamped voltage during 600 W transient, limiting stress on downstream components |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform, critical for lightning/ESD immunity |
| IPPM | 44.1 A - maximum non-repetitive surge current supported without degradation |
| TJ max. | +150 °C - enables use in high-temperature industrial environments without derating |
| Package | SMB (DO-214AA) - standardized 2-pin SMT footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical P-N junction; conducts during positive overvoltage events |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical P-N junction; conducts during negative overvoltage events; no band marking for bidirectional types |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC-coupled or floating lines |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 44.1 A - meets IEC 61000-4-5 Level 3 (1 kV surge) when properly mounted |
| Halogen-free & RoHS-compliant (M3) | Complies with JEDEC J-STD-20 and JESD201 Class 2 whisker resistance - suitable for green manufacturing and automotive supply chains |
| Low clamping ratio | VC/VWM = 1.7 - minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected ICs |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - allows direct placement from dry pack without baking |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback signal lines against inductive kickback from 24 V DC solenoids and relay coils. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor control signal inputs to clamp ±1 kV transients induced by load switching. Use Value: Prevents false triggering or latch-up in isolated gate drivers (e.g., Si823x) by limiting transient voltage to ≤13.6 V at 44.1 A. | Use Scenario: ESD and load-dump protection on LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules. IC Role / Device Role / Timing Role: Standoff voltage (8.0 V) matches typical 5–12 V sensor supply rails; clamps transients without interfering with normal signal swing. Use Value: Maintains signal integrity during ISO 10605 ±30 kV contact discharge while surviving 125 °C under-hood thermal cycling. |
| Telecom Power Feeds | Consumer USB Port Protection |
Use Scenario: Secondary-side surge suppression on 48 V PoE injectors and splitters exposed to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Bidirectional clamping across differential data/power lines to limit common-mode transients before isolation transformers. Use Value: Withstands 600 W pulses without degradation, enabling compliance with IEEE 802.3bt Type 4 surge requirements. | Use Scenario: Overvoltage protection on VBUS and D+/D− lines of USB 2.0 ports in smart speakers and set-top boxes. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector to shunt ESD strikes (IEC 61000-4-2 ±8 kV) before reaching USB transceivers. Use Value: Clamps to 13.6 V within <1 ns, preventing damage to USB PHYs with 3.3 V I/O tolerance and 1.5 kΩ input impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3) | Acceptable for commercial-grade designs where halogen-free requirement is not mandated | Select E3 for cost-sensitive non-automotive applications with standard RoHS compliance |
| SMCJ8.0CA-M3 | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but requires larger PCB area | Choose SMCJ8.0CA-M3 only if 600 W is insufficient and board space allows 7.11 mm × 6.22 mm footprint |
Compared with SMBJ8.0CA-E3/52, the SMBJ8.0CA-M3/52 offers halogen-free construction essential for automotive Tier-1 supply chains, while SMCJ8.0CA-M3 provides double the surge power at the cost of 70% larger footprint - making SMBJ8.0CA-M3/52 optimal for space-constrained, environmentally regulated industrial designs.
Availability
SMBJ8.0CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB port protection requiring stable component supply and halogen-free compliance.
Supply support for SMBJ8.0CA-M3/52 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and performance in harsh environments.
The SMBJ series was developed specifically for robust, surface-mount transient suppression in space-constrained industrial, automotive, and telecom systems - balancing high surge capability with compact DO-214AA packaging.
FAQ
What is the clamping voltage of SMBJ8.0CA-M3/52 at its rated peak pulse current?
The SMBJ8.0CA-M3/52 has a maximum clamping voltage (VC) of 13.6 V at its rated peak pulse current (IPPM) of 44.1 A, measured using a 10/1000 µs waveform. This value ensures downstream components like microcontrollers or interface ICs experience limited overvoltage stress during surge events. The SMBJ8.0CA-M3/52 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ8.0CA-M3/52 suitable for automotive applications?
SMBJ8.0CA-M3/52 itself is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMBJ8.0CA-HM3_X variant (e.g., SMBJ8.0CA-HM3_A) that is AEC-Q101 qualified and halogen-free. For automotive sensor or body-control module designs requiring qualification, the HM3_X version must be specified - the SMBJ8.0CA-M3/52 remains appropriate for non-automotive industrial and telecom applications.
How does the bidirectional design of SMBJ8.0CA-M3/52 affect its circuit placement?
The SMBJ8.0CA-M3/52 has no polarity marking and delivers identical VBR, VC, and IPPM in both directions, allowing placement across any two nodes subject to bidirectional transients - such as differential signal lines, AC-coupled interfaces, or floating power rails. Unlike unidirectional TVS diodes, the SMBJ8.0CA-M3/52 eliminates orientation errors during automated assembly and avoids the need for series diode pairing in AC protection schemes.
What is the thermal resistance of SMBJ8.0CA-M3/52, and how does it impact power dissipation?
The SMBJ8.0CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values mean that under continuous 5.0 W power dissipation (its rated PD), the junction temperature rises ~500 °C above ambient - confirming that SMBJ8.0CA-M3/52 is intended only for transient, not steady-state, power handling. Its 600 W rating applies exclusively to short-duration 10/1000 µs pulses.
Does SMBJ8.0CA-M3/52 require special PCB layout considerations for optimal surge performance?
Yes - optimal surge performance requires mounting SMBJ8.0CA-M3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal impedance and reduce IPPM capability. Additionally, minimizing trace length between the SMBJ8.0CA-M3/52 and protected node reduces inductance, preserving sub-nanosecond response. Avoid routing sensitive traces near the TVS anode/cathode unless directly connected.
SMBJ8.0CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ8.0CA-M3/52 FAQ
1.How can I place an order for SMBJ8.0CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CA-M3/52 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 SMBJ8.0CA-M3/52 reliable?
The price and inventory of SMBJ8.0CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CA-M3/52?
SMBJ8.0CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CA-M3/52 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 SMBJ8.0CA-M3/52?
For technical support, including SMBJ8.0CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ8.0CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CA-M3/52 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 SMBJ8.0CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CA-M3/52?
All SMBJ8.0CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CA-M3/52, 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 SMBJ8.0CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CA-M3/52 Tags
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