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Vishay General Semiconductor - Diodes Division SMBJ45CA-M3/52
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- Part No.:
- SMBJ45CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CA-M3/52.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
SMBJ45CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ45CA-M3/52 datasheet, SMBJ45CA-M3/52 pinout, SMBJ45CA-M3/52 application, or SMBJ45CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping behavior for positive and negative transients - critical for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the SMB package supports high surge current handling without thermal runaway under repetitive 0.01% duty cycle conditions.
The device meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C) and exhibits a temperature coefficient of VBR at +0.102 %/°C - enabling predictable derating above 25 °C ambient. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) is validated on standard 0.2" × 0.2" copper pads, defining practical PCB layout constraints for sustained 5.0 W power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC RMS working range. |
| VBR min/max | 50.0 V / 55.3 V at IT = 1 mA - guaranteed breakdown window ensuring consistent turn-on across production lots. |
| VC @ IPPM | 72.7 V at 8.3 A - clamping voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling capability; sets protection margin against lightning or EFT events. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at rated stand-off; preserves signal integrity in high-impedance sensor interfaces. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height. |
Pinout & Package
Two-terminal bidirectional device housed in SMB (DO-214AA) package; no polarity marking on body. Terminals are matte tin-plated leads compatible with J-STD-002 soldering standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical bidirectional avalanche structure - either terminal serves as cathode or anode depending on transient polarity. |
| Case (body) | Thermal and mechanical interface | Non-electrical; SMB molding compound meets UL 94 V-0 flammability rating and provides mechanical strain relief. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power domains without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted per recommended pad layout. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for industrial and consumer end equipment without compromising surge robustness. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn effect or bond wire damage - suitable for high-yield SMT lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving protection response time below 1 ns. |
Applications
| Industrial Motor Drives | Telecom Interface Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensors from switching-induced voltage spikes in 3-phase inverters. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus rails and isolated signal lines to clamp inductive kickback transients. Use Value: Prevents latch-up or permanent damage to SiC MOSFET drivers by limiting transient excursions to ≤72.7 V during 8.3 A surges. |
Use Scenario: Safeguarding RS-485 transceivers connected to long outdoor cabling exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Placed differential-line-to-ground to suppress common-mode transients while preserving signal integrity up to 20 Mbps. Use Value: Maintains data link reliability by clamping 10/1000 µs surges to 72.7 V without adding capacitance (>100 pF) that would distort edge rates. |
| Automotive Body Control Modules | Consumer Power Adapters |
|
Use Scenario: Securing LIN bus nodes and LED driver ICs against load dump and jump-start transients in 12 V systems. IC Role / Device Role / Timing Role: Bidirectional TVS on power input and communication lines to absorb ISO 7637-2 Pulse 5a (75 V/350 ms) energy. Use Value: Enables AEC-Q101-compliant designs using M3-grade SMBJ45CA-M3/52 variants, meeting automotive reliability without discrete fuse coordination. |
Use Scenario: Overvoltage suppression on secondary-side DC outputs of USB-C PD adapters subject to capacitor discharge transients. IC Role / Device Role / Timing Role: Mounted between +VOUT and GND to limit fault voltage during output short-circuit recovery or hot-plug events. Use Value: Limits worst-case output excursion to 72.7 V during 600 W surges, preventing downstream regulator latch-up or capacitor overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Preferred for commercial-grade applications where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 qualification is unnecessary. |
| SMCJ45CA-M3 | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; same VWM/VBR/VC. | Suitable for higher-energy surge environments (e.g., AC mains input stages) requiring greater margin. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and PCB space allows SMC footprint. |
Compared with SMBJ45CA-E3/52, the M3 variant adds halogen-free compliance without performance trade-offs; versus SMCJ45CA-M3, SMBJ45CA-M3/52 offers identical clamping performance in a 30% smaller footprint - optimizing board area in space-constrained DC/DC and interface modules.
Availability
SMBJ45CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom interface protection, automotive body control modules, and consumer power adapters requiring stable component supply across extended production lifecycles.
Supply support for SMBJ45CA-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, and protection devices with emphasis on reliability, surge robustness, and automotive qualification.
The SMBJ series targets high-reliability transient suppression in compact SMT formats - engineered for industrial automation, telecom infrastructure, and automotive subsystems where space, thermal performance, and repeatable clamping are critical.
FAQ
What is the clamping voltage of SMBJ45CA-M3/52 under a 10/1000 µs surge?
The SMBJ45CA-M3/52 has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88392 and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The SMBJ45CA-M3/52 maintains this clamping performance bidirectionally due to its symmetrical avalanche structure.
Is SMBJ45CA-M3/52 suitable for automotive applications?
The SMBJ45CA-M3/52 itself is commercial-grade (M3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ45CA-HM3_X variant (e.g., SMBJ45CA-HM3_A) with full AEC-Q101 qualification. For non-automotive industrial or telecom use, SMBJ45CA-M3/52 delivers the same electrical performance and halogen-free compliance required by many Tier 1 suppliers' design-in specifications.
How does the SMBJ45CA-M3/52 differ from unidirectional SMBJ45A-M3/52?
The SMBJ45CA-M3/52 is bidirectional with symmetrical clamping in both polarities and no cathode band marking, whereas SMBJ45A-M3/52 is unidirectional, marked with a cathode band, and conducts only in reverse bias. Their VWM (45 V), VBR (50.0–55.3 V), and VC (72.7 V) match, but SMBJ45A-M3/52 supports 100 A IFSM forward surge current - a capability irrelevant to SMBJ45CA-M3/52 due to its bidirectional architecture.
What PCB pad layout is recommended for SMBJ45CA-M3/52 to achieve rated 600 W pulse power?
Vishay specifies that the 600 W PPPM rating for SMBJ45CA-M3/52 assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Figure 6 in document 88392. Smaller pads reduce thermal dissipation, derating pulse power significantly - e.g., 50% reduction at 0.1" × 0.1" pads. The SMBJ45CA-M3/52 thermal resistance (RθJL = 20 °C/W) relies on this copper area to sustain repetitive surges.
Does SMBJ45CA-M3/52 meet JEDEC moisture sensitivity level requirements?
Yes, SMBJ45CA-M3/52 meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows unlimited floor life and compatibility with standard lead-free reflow profiles without baking preconditioning. The device's glass-passivated chip junction and UL 94 V-0 molding compound contribute to this robust moisture resistance - confirmed in Vishay document 88392, page 1.
SMBJ45CA-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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMBJ45CA-M3/52 FAQ
1.How can I place an order for SMBJ45CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CA-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 SMBJ45CA-M3/52 reliable?
The price and inventory of SMBJ45CA-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 SMBJ45CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ45CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CA-M3/52?
SMBJ45CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CA-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 SMBJ45CA-M3/52?
For technical support, including SMBJ45CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ45CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ45CA-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 SMBJ45CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ45CA-M3/52?
All SMBJ45CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CA-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 SMBJ45CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ45CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CA-M3/52 Tags
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