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Vishay General Semiconductor - Diodes Division SMBJ75CA-E3/5B
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- Part No.:
- SMBJ75CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CA-E3/5B.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,609
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Product details
Overview
SMBJ75CA-E3/5B 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 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 dissipation with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ75CA-E3/5B datasheet, SMBJ75CA-E3/5B pinout, SMBJ75CA-E3/5B application, or SMBJ75CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), JEDEC-compliant SMB package thermal performance (RθJA = 100 °C/W), and AEC-Q101 qualification readiness via HE3/HM3 variants.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping behavior during positive and negative transients - critical for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
The device complies with ANSI/IEEE C62.35 surge standards and supports repetitive surge duty cycles up to 0.01 %, enabling reliable protection against inductive switching spikes and lightning-induced surges in 24 V and 48 V industrial control systems. Its MSL Level 1 rating and matte tin-plated leads ensure compatibility with lead-free reflow processes up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on under transient stress. |
| VC (Clamping Voltage) | 121 V at 5.0 A (10/1000 µs) - Limits voltage seen by downstream ICs during surge; clamping ratio = 1.61×VWM. |
| PPPM (Peak Pulse Power) | 600 W - Sustains single 10/1000 µs surges without failure; derates linearly above 25 °C ambient per Fig. 2. |
| IPPM (Peak Pulse Current) | 5.0 A - Peak current handled at VC; correlates directly with protected line impedance and surge source strength. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; mandates minimum 5.0 mm × 5.0 mm copper pads per terminal for rated power handling. |
| TJmax | 150 °C - Maximum junction temperature; sets upper limit for sustained power dissipation and ambient operating range. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); RoHS-compliant matte tin plating; MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts positive or negative transient; no cathode band marking required for CA suffix devices. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24–48 V DC lines without derating. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on downstream MOSFET gates or RS-485 transceivers during clamping events. |
| Glass passivated junction | Ensures stable leakage (<1.0 µA at 75 V) and long-term reliability under humid or high-bias conditions. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling requirements. |
| UL 497B recognized (QVGQ2) | Validates suitability for primary-side telecom and industrial surge protection per safety agency requirements. |
Applications
| Industrial Motor Drives | Telecom Interface Protection |
|---|---|
|
Use Scenario: Protecting gate drivers and feedback sensors in 48 V BLDC motor controllers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across half-bridge power stage inputs and isolated analog sensor lines. Use Value: Clamps transients to ≤121 V within <1 ns, preventing MOSFET avalanche failure and ADC input saturation. |
Use Scenario: Shielding RS-485 transceivers in outdoor base station backhaul links from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired SMBJ75CA-E3/5B devices on differential pair (A/B) referenced to ground, forming symmetrical surge shunt path. Use Value: Maintains signal integrity by limiting differential voltage excursion to <121 V while surviving 4 kV IEC 61000-4-5 surges. |
| Programmable Logic Controllers (PLCs) | Automotive Body Control Modules (BCM) |
|
Use Scenario: Safeguarding 24 V digital I/O channels in DIN-rail mounted PLCs exposed to relay coil switching noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting surge energy before it reaches optocoupler inputs or MCU GPIOs. Use Value: Withstands 100 A surge current (IFSM-equivalent) and maintains <1 µA leakage at 75 V for low-power sleep mode integrity. |
Use Scenario: Protecting LIN bus transceivers and LED driver outputs in BCMs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element on 12 V supply rail and LIN data line, qualified per AEC-Q101 when using HE3 suffix variant. Use Value: Delivers automotive-grade reliability with 150 °C max junction temperature and validated surge lifetime under repetitive 10/1000 µs pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; selected where halogen-free compliance is mandated. | Direct material substitution when halogen-free BOM requirement applies; same thermal and clamping performance. |
| SAC75CA | Same VWM/VC ratings but in smaller SOD-123FL package; lower PPPM (400 W) and higher RθJA (150 °C/W). | Limited to lower-energy surges (e.g., ESD-only) due to reduced power handling and thermal capability. | Use only where space constraints prohibit SMB and surge energy is limited to <400 W; not suitable for IEC 61000-4-5 Level 4. |
Compared with SMBJ75CA-E3/5B, the M3/5B variant offers identical protection performance with halogen-free construction, while SAC75CA trades 33 % lower peak power and inferior thermal management for 40 % smaller footprint - making SMBJ75CA-E3/5B the preferred choice for industrial-grade surge immunity.
Availability
SMBJ75CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom interface protection, programmable logic controllers (PLCs), and automotive body control modules requiring stable component supply and consistent surge performance across production batches.
Supply support for SMBJ75CA-E3/5B 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, and protection devices with emphasis on reliability, power efficiency, and industrial-grade qualification.
The SMBJ series was developed specifically for high-reliability transient suppression in harsh environments - targeting 24–48 V industrial, telecom, and automotive subsystems where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ75CA-E3/5B at its rated peak pulse current?
The SMBJ75CA-E3/5B has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ75CA-E3/5B maintains this clamping performance bidirectionally, ensuring symmetric protection for AC-coupled or floating nodes.
Is SMBJ75CA-E3/5B suitable for automotive applications?
SMBJ75CA-E3/5B itself is commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like SMBJ75CAHE3_B/I. The SMBJ75CA-E3/5B shares identical electrical and thermal characteristics with those qualified variants - meaning its core protection performance is automotive-capable, but formal qualification requires the HE3 or HM3 suffix. For non-qualified use in automotive prototypes or non-safety-critical modules, SMBJ75CA-E3/5B remains technically viable.
How does the bidirectional design of SMBJ75CA-E3/5B affect its placement in circuit layouts?
The SMBJ75CA-E3/5B has no polarity marking and functions identically in either orientation, simplifying PCB layout and eliminating risk of reverse installation. Engineers place it across protected nodes (e.g., between signal line and ground, or across differential pairs) without regard to anode/cathode direction. This symmetry also enables dual-use configurations - such as protecting both sides of a transformer-coupled interface - without redesigning the footprint. The SMBJ75CA-E3/5B's DO-214AA package supports automated placement in high-volume manufacturing.
What is the maximum steady-state power dissipation for SMBJ75CA-E3/5B?
The SMBJ75CA-E3/5B has a maximum steady-state power dissipation (PD) of 5.0 W at 50 °C ambient temperature on an infinite heatsink. In practical PCB designs, its thermal performance depends on copper pad area: Vishay specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) pads per terminal to achieve the rated 100 °C/W junction-to-ambient resistance. Exceeding 5.0 W continuously will cause thermal runaway; the SMBJ75CA-E3/5B is intended for transient, not continuous, power handling.
Does SMBJ75CA-E3/5B meet any safety agency certifications?
Yes - the SMBJ75CA-E3/5B carries Underwriters Laboratories (UL) recognition under standard UL 497B (file E136766) for both unidirectional and bidirectional transient protectors. This certification validates its suitability for use in telecom and industrial equipment requiring third-party safety approval. The device also meets JESD22-B102 solderability standards and J-STD-020 MSL Level 1 moisture sensitivity requirements, confirming robustness in automated assembly processes. All SMBJ75CA-E3/5B units comply with RoHS Directive 2011/65/EU.
SMBJ75CA-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBJ75CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CA-E3/5B 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-E3/5B reliable?
The price and inventory of SMBJ75CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ75CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CA-E3/5B?
SMBJ75CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CA-E3/5B 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-E3/5B?
For technical support, including SMBJ75CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ75CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ75CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ75CA-E3/5B?
All SMBJ75CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ75CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CA-E3/5B Tags
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