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Vishay General Semiconductor - Diodes Division SMBJ75CAHE3_A/I
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- Part No.:
- SMBJ75CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75CAHE3_A/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,877
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Product details
Overview
SMBJ75CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 75 V stand-off 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 a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ75CAHE3_A/I datasheet, SMBJ75CAHE3_A/I pinout, SMBJ75CAHE3_A/I application, or SMBJ75CAHE3_A/I equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity-dependent layout constraints in AC-coupled or floating signal paths.
The SMBJ75CAHE3_A/I exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes. It is rated for repetitive 0.01% duty cycle pulses and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC RMS working limit. |
| VBR min/max | 83.3 V / 92.1 V at IT = 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 121 V at 5.0 A - clamped voltage under standardized 10/1000 µs surge; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - maximum junction temperature; enables reliable operation in enclosed industrial enclosures or under sustained ambient heat. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
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, RoHS-compliant and AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Bidirectional terminal pair | Identical terminals - no cathode/anode distinction; symmetrical conduction in both directions for AC or floating applications. |
| Anode (Cathode) | Bidirectional terminal pair | Same physical structure as opposite terminal; enables single-component protection of differential or ungrounded lines without orientation concerns. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for under-hood and infotainment power rails. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 5.0 A while limiting clamped voltage to 121 V - meets IEC 61000-4-5 surge immunity requirements for industrial equipment. |
| MSL Level 1 | Zero floor life limitation; compatible with standard SMT reflow profiles up to 260 °C peak - eliminates baking requirements and simplifies manufacturing. |
| Low profile SMB package | Height ≤ 2.20 mm - enables compact PCB layouts in space-constrained modules such as PoE injectors, base station RF front-ends, and motor drive control boards. |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress - critical for field-deployed infrastructure with >10-year service life expectations. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Protection |
|---|---|
|
Use Scenario: Protecting primary-side rectifier outputs and secondary-side DC bus lines from load dump and lightning-induced surges in DIN-rail mounted PSUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input/output rails to shunt transient energy before it reaches PWM controllers or gate drivers. Use Value: Limits rail overvoltage to ≤121 V during 600 W surges, preventing latch-up or catastrophic failure of 100 V-rated MOSFETs and optocouplers. |
Use Scenario: Safeguarding Ethernet PHY interfaces and analog front-end components on carrier-grade DSLAM and ONU line cards exposed to induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: Low-capacitance TVS placed differential-mode across pairs and common-mode across line-to-ground to suppress EFT and surge coupling. Use Value: Maintains signal integrity below 1.0 µA leakage at 75 V while clamping transients within 1 ns - preserves 100BASE-TX timing margins and BER performance. |
| Automotive Body Control Module (BCM) Power Input | Sensor Signal Line Protection |
|
Use Scenario: Guarding 12 V battery-fed microcontroller power inputs in BCMs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device upstream of LDOs and PMICs, sized to absorb 600 W pulses without thermal runaway. Use Value: AEC-Q101 qualification ensures survival through -40 °C to +125 °C operation and 1000+ thermal cycles - meeting OEM longevity requirements. |
Use Scenario: Shielding analog outputs of pressure, temperature, and position sensors in engine management systems from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) bidirectional clamp placed directly at connector interface to prevent ESD damage to precision ADC inputs. Use Value: Clamps ±15 kV contact ESD per IEC 61000-4-2 to <121 V within nanoseconds - avoids sensor offset drift or calibration corruption. |
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-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VBR/VC specs, identical SMB package and pinout. | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ75CAHE3_A/I | Higher 1500 W peak pulse power rating, larger SMC (DO-214AB) package, same VWM/VBR/VC electrical specs. | Requires larger PCB footprint and higher thermal mass; suited for higher-energy surge environments like AC mains input stages. | Choose when system-level surge testing exceeds 600 W requirements or when board layout allows larger SMC footprint. |
Compared with SMBJ75CA-E3/52, the SMBJ75CAHE3_A/I adds AEC-Q101 qualification without altering clamping performance; compared with SMCJ75CAHE3_A/I, it trades 600 W surge capacity and compact SMB size for reduced board area and lower assembly cost - ideal for space-constrained automotive and telecom edge nodes.
Availability
SMBJ75CAHE3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and sensor interface protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ75CAHE3_A/I 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and manufacturability.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where surge immunity, thermal stability, and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ75CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration, meaning the SMBJ75CAHE3_A/I provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ75A), it has no polarity marking and functions identically regardless of applied voltage direction - essential for protecting AC-coupled, differential, or floating signal paths without orientation constraints.
Is SMBJ75CAHE3_A/I suitable for automotive applications?
Yes, SMBJ75CAHE3_A/I is AEC-Q101 qualified, verified for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock. Its -55 °C to +150 °C operating range, MSL Level 1 rating, and RoHS-compliant construction make it appropriate for under-hood body control modules, infotainment power rails, and ADAS sensor interfaces where long-term field reliability is critical.
How does SMBJ75CAHE3_A/I differ from SMBJ75AHE3_A/I?
SMBJ75CAHE3_A/I is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas SMBJ75AHE3_A/I is unidirectional with a cathode band and only suppresses positive transients relative to its marked cathode. The "CA" version supports AC line protection and floating ground systems; the "A" version is limited to DC rail protection with defined polarity and includes a 100 A IFSM rating not applicable to bidirectional types.
What is the maximum clamping voltage of SMBJ75CAHE3_A/I under surge conditions?
The SMBJ75CAHE3_A/I has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current with a 10/1000 µs waveform. This value represents the worst-case voltage imposed on protected circuitry during standardized surge events and is measured per ANSI/IEEE C62.35 - ensuring predictable overvoltage limiting for downstream 100 V-rated components.
Does SMBJ75CAHE3_A/I require special PCB layout considerations?
Yes - for optimal thermal and surge performance, SMBJ75CAHE3_A/I should be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the specified RθJA of 100 °C/W and sustain 600 W pulse power. Short, wide traces to protected nodes minimize inductance, and placement near entry connectors reduces impedance path for transient energy diversion.
SMBJ75CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ75CAHE3_A/I FAQ
1.How can I place an order for SMBJ75CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75CAHE3_A/I 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 SMBJ75CAHE3_A/I reliable?
The price and inventory of SMBJ75CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ75CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ75CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75CAHE3_A/I?
SMBJ75CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75CAHE3_A/I 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 SMBJ75CAHE3_A/I?
For technical support, including SMBJ75CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ75CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75CAHE3_A/I 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 SMBJ75CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ75CAHE3_A/I?
All SMBJ75CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75CAHE3_A/I, 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 SMBJ75CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ75CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75CAHE3_A/I Tags
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