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Vishay General Semiconductor - Diodes Division SMB8J33CA-M3/52
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- Part No.:
- SMB8J33CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J33CA-M3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,889
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Product details
Overview
SMB8J33CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 53.3 V clamping voltage (VC) at 15 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J33CA-M3/52 datasheet, SMB8J33CA-M3/52 pinout, SMB8J33CA-M3/52 application, or SMB8J33CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), and thermal resistance (RθJA = 72 °C/W) for PCB-level thermal design validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the bidirectional configuration enables symmetric clamping across both polarities without external polarity management.
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 delivers 800 W peak pulse power dissipation under standardized 10/1000 μs waveform conditions - validated on 0.2" × 0.2" copper pads per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - guaranteed breakdown onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 53.3 V at 15 A - clamped voltage under full-rated surge; limits downstream IC stress to sub-55 V level. |
| PPPM | 800 W - peak pulse power handling with 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity. |
| ID @ VWM | 1.0 μA - ultra-low leakage at stand-off voltage; avoids signal integrity degradation in high-impedance sensor lines. |
| TJ max. | +150 °C - extended junction temperature rating enables use in under-hood automotive environments. |
| RθJA | 72 °C/W - thermal resistance from junction to ambient; informs minimum copper pad area required for sustained surge duty. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration with cathode band omitted per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Terminals 1 & 2) | Bidirectional surge path | Interchangeable terminals; conducts equally in both directions above VBR - eliminates orientation constraints during automated placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensor, and body electronics. |
| Halogen-free & RoHS-compliant (M3) | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability - supports green manufacturing and end-of-life compliance. |
| Low-profile SMB package | Height ≤ 2.20 mm - enables compact layout in space-constrained modules such as CAN transceiver protection or USB-C ESD arrays. |
| Fast response time | <1 ps - clamps transients before propagation into sensitive analog front-ends or microcontroller I/O pins. |
| MSL Level 1 | Reflow-compatible up to 260 °C peak - allows single-pass lead-free assembly without moisture sensitivity concerns. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-based transient clamp placed directly at connector entry point, upstream of signal conditioning amplifier. Use Value: Limits voltage excursion to ≤53.3 V during 10/1000 μs surges, preserving ADC input integrity and preventing latch-up in 3.3 V/5 V microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary surge suppression element on each isolated input channel, paired with series impedance. Use Value: Absorbs 800 W peak energy without degradation, enabling robust operation in factory-floor environments with frequent inductive switching noise. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
|
Use Scenario: Bidirectional clamping on RS-485 differential pairs exposed to lightning-induced surges in outdoor telecom equipment. IC Role / Device Role / Timing Role: Common-mode TVS across A/B lines, referenced to ground via low-inductance layout. Use Value: Symmetric clamping ensures equal protection on both signal polarities, maintaining signal integrity during ±1 kV EFT bursts per IEC 61000-4-4. |
Use Scenario: Input-stage surge protection on 12–24 V DC input rails of smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: First-line defense against plug-in surges and human-body-model (HBM) ESD events. Use Value: 1.0 μA leakage at 33 V prevents standby current increase in always-on devices, while 53.3 V VC avoids overvoltage shutdown of PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J33CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant but not halogen-free (E3 vs. M3). | Lacks halogen-free certification; acceptable for commercial, non-automotive applications where JESD201 Class 2 whisker resistance is not mandated. | Select SMB8J33CA-E3/52 when halogen-free requirement is absent and cost optimization is prioritized. |
| SMBJ33CA-M3/52 | Same VWM/VBR/VC ratings but lower PPPM (600 W vs. 800 W); identical SMB footprint and AEC-Q101 qualification. | Lower surge energy handling limits use to less severe environments (e.g., interior infotainment vs. under-hood sensors). | Choose SMBJ33CA-M3/52 only if system-level surge testing confirms 600 W sufficiency and board space is constrained to legacy SMBJ layout. |
Compared with SMB8J33CA-M3/52, the E3 variant trades halogen-free compliance for broader commercial availability, while the SMBJ33CA-M3/52 reduces surge capacity by 25 % - making SMB8J33CA-M3/52 the optimal choice for AEC-Q101–required, high-energy automotive and industrial deployments.
Availability
SMB8J33CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface circuits requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J33CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, bidirectional surge suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J33CA-M3/52 and how is it measured?
The SMB8J33CA-M3/52 has a maximum clamping voltage (VC) of 53.3 V, measured at 15 A peak pulse current (IPPM) using a standardized 10/1000 μs waveform per ANSI/IEEE C62.35. This value reflects the actual voltage seen by downstream circuitry during full-rated surge events and is verified on PCBs with 0.2" × 0.2" copper pads per datasheet test condition.
Is SMB8J33CA-M3/52 suitable for automotive applications?
Yes, SMB8J33CA-M3/52 is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HM3 suffix). It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control units, ADAS camera modules, and body electronics where bidirectional surge protection is needed.
How does the M3 suffix differ from E3 in SMB8J33CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, whereas E3 is RoHS-compliant but contains halogens. Both share identical electrical specifications and SMB package dimensions, but SMB8J33CA-M3/52 is required for automotive and green-electronics programs mandating halogen-free materials.
What is the thermal resistance of SMB8J33CA-M3/52 and why does it matter?
SMB8J33CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W. This parameter determines how much the junction temperature rises per watt of dissipated surge power - critical for ensuring the device stays below its 150 °C maximum junction temperature during repeated transient events on standard PCB layouts.
Can SMB8J33CA-M3/52 be used in bidirectional signal lines like RS-485?
Yes, SMB8J33CA-M3/52 is a bidirectional TVS diode with symmetrical breakdown and clamping behavior, making it ideal for protecting differential buses such as RS-485, CAN, or LVDS. Its 33 V stand-off voltage provides margin above common-mode ranges, and its 53.3 V clamping voltage safeguards transceivers rated for ≤58 V absolute maximum.
SMB8J33CA-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 15A
- 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 (SMBJ)
SMB8J33CA-M3/52 FAQ
1.How can I place an order for SMB8J33CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J33CA-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 SMB8J33CA-M3/52 reliable?
The price and inventory of SMB8J33CA-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 SMB8J33CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J33CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J33CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J33CA-M3/52?
SMB8J33CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J33CA-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 SMB8J33CA-M3/52?
For technical support, including SMB8J33CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J33CA-M3/52 requirements.
6.How does Aetrix verify that SMB8J33CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J33CA-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 SMB8J33CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J33CA-M3/52?
All SMB8J33CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J33CA-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 SMB8J33CA-M3/52 part is unused and in its original packaging.
Return procedure for SMB8J33CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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