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Vishay General Semiconductor - Diodes Division SMBJ75CA-M3/5B
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- Part No.:
- SMBJ75CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CA-M3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,402
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Product details
Overview
SMBJ75CA-M3/5B 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 power and signal lines. It features a 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 121 V maximum clamping voltage (VC) at 5.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ75CA-M3/5B datasheet, SMBJ75CA-M3/5B pinout, SMBJ75CA-M3/5B application, or SMBJ75CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.31), halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates symmetrically in both directions, with no polarity marking on the case, enabling protection of AC-coupled or differential signal paths without orientation constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance supports operation up to +150 °C junction temperature under defined PCB layout conditions.
The SMBJ75CA-M3/5B delivers fast response time (<1.0 ns), low incremental surge resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is not AEC-Q101 qualified (lacks HE3/HM3 suffix), distinguishing it from automotive-grade variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 83.3 V / 92.1 V at 1.0 mA - Confirmed breakdown range ensuring reliable triggering across process variation and temperature. |
| VC @ IPPM | 121 V at 5.0 A - Clamped voltage during 10/1000 µs transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity; validates robustness against lightning-induced surges and inductive switching spikes. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in enclosed industrial enclosures with limited airflow. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no cathode/anode marking; symmetrical two-terminal construction. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity of transient; no fixed polarity required in layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; device functions identically regardless of orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or ungrounded sensor outputs without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Validated surge immunity against IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-earth) when mounted per recommended pad layout. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and consumer electronics without compromising surge performance. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture sensitivity handling overhead in SMT lines. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage exposure to protected ICs - critical for 75 V-rated power rails where headroom above VWM is constrained. |
Applications
| Industrial Power Supply Protection | RS-485 Communication Line Protection |
|---|---|
|
Use Scenario: Protecting 72–80 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤121 V during 5 A surge events, preserving reliability of 100 V-rated input capacitors and MOSFETs. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., MAX13487) in factory automation networks exposed to ground potential differences. IC Role / Device Role / Timing Role: Placed differentially between A/B bus lines and common-mode reference to suppress ESD and fast transients. Use Value: Maintains signal integrity by clamping common-mode surges without affecting DC bias or data rate (up to 20 Mbps). |
| Automotive Body Control Module (BCM) Input Protection | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protecting 12 V auxiliary inputs (e.g., door lock actuator drivers) in BCMs against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Used in conjunction with unidirectional TVS or polymeric PTC to handle bidirectional overvoltage events on shared power domains. Use Value: Provides fail-safe clamping at 121 V without requiring polarity-aware placement - reducing assembly errors in high-mix production. |
Use Scenario: Shielding 4–20 mA current loop transmitter outputs from field wiring transients in process control instrumentation. IC Role / Device Role / Timing Role: Mounted across output terminals to limit fault voltage during cable disconnect or lightning coupling. Use Value: Prevents latch-up in op-amps and DACs by limiting transient voltage to 121 V while maintaining sub-µA leakage at 24 V nominal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-E3/5B | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable for commercial-grade designs where halogen-free requirement is not mandated. | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and soldering behavior. |
| SMBJ75A-M3/5B | Unidirectional variant - includes cathode band marking and forward voltage drop (~3.5 V at 50 A); lacks symmetrical clamping. | Only suitable for DC-biased lines with known polarity; cannot protect AC or floating differential signals. | Choose only if circuit topology guarantees fixed polarity and lower forward conduction loss is needed during fault conditions. |
Compared with SMBJ75CA-M3/5B, the E3/5B alternative trades halogen-free status for slightly lower unit cost, while the SMBJ75A-M3/5B requires polarity-aware layout and sacrifices bidirectional capability - making SMBJ75CA-M3/5B the sole choice for polarity-agnostic or AC-coupled protection.
Availability
SMBJ75CA-M3/5B is available at Aetrix Electronics and suitable for industrial power supply protection, RS-485 communication line hardening, automotive body control module inputs, and industrial sensor signal conditioning requiring stable component supply and halogen-free compliance.
Supply support for SMBJ75CA-M3/5B 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, surge robustness, and AEC-Q qualification.
The SMBJ series was developed for high-energy transient suppression in space-constrained industrial and telecom systems, prioritizing low clamping voltage, repeatable breakdown, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMBJ75CA-M3/5B at its rated peak pulse current?
The SMBJ75CA-M3/5B has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75CA-M3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) when mounted on the recommended 5.0 mm × 5.0 mm copper pads.
Is SMBJ75CA-M3/5B suitable for automotive applications?
The SMBJ75CA-M3/5B is not AEC-Q101 qualified - it carries the M3 commercial-grade suffix, not HM3 or HE3. While it shares the same SMB package and electrical specs as automotive variants, Vishay explicitly reserves AEC-Q101 qualification for parts with HE3/HM3 suffixes. Therefore, SMBJ75CA-M3/5B is intended for industrial, telecom, and consumer applications; use SMBJ75CA-HM3/5B instead for automotive body electronics requiring qualification.
How does the bidirectional design of SMBJ75CA-M3/5B affect PCB layout?
The SMBJ75CA-M3/5B has no polarity marking and functions identically regardless of orientation, simplifying PCB layout and eliminating risk of misplacement during automated assembly. Unlike unidirectional TVS diodes (e.g., SMBJ75A-M3/5B), it requires no cathode alignment check - reducing inspection steps and preventing open-circuit failures due to reversed placement. This symmetry also enables reuse across AC-coupled or differential signal paths without redesigning footprints.
What is the thermal resistance of SMBJ75CA-M3/5B, and how does it impact power derating?
The SMBJ75CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper). This value directly governs steady-state power derating: at 70 °C ambient, its 5.0 W rated power dissipation drops to ~2.5 W. Engineers must verify board-level copper area and airflow to ensure junction temperature stays below +150 °C during combined DC leakage and transient stress.
Does SMBJ75CA-M3/5B meet lead-free reflow requirements?
Yes, SMBJ75CA-M3/5B is rated for lead-free reflow with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020. Its matte tin-plated terminals are solderable per J-STD-002 and JESD 22-B102, and the molding compound complies with UL 94 V-0 flammability rating. No moisture preconditioning is required prior to reflow, streamlining manufacturing for high-volume SMT lines.
SMBJ75CA-M3/5B 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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)
SMBJ75CA-M3/5B FAQ
1.How can I place an order for SMBJ75CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CA-M3/5B 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 SMBJ75CA-M3/5B reliable?
The price and inventory of SMBJ75CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CA-M3/5B?
SMBJ75CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CA-M3/5B 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 SMBJ75CA-M3/5B?
For technical support, including SMBJ75CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ75CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75CA-M3/5B 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 SMBJ75CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75CA-M3/5B?
All SMBJ75CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CA-M3/5B, 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 SMBJ75CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ75CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CA-M3/5B Tags
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Diodes Incorporated
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