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Vishay General Semiconductor - Diodes Division SMBJ75AHM3_A/I
- Part No.:
- SMBJ75AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3_A/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,615
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Product details
Overview
SMBJ75AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensor interfaces.
For engineers reviewing the SMBJ75AHM3_A/I datasheet, SMBJ75AHM3_A/I pinout, SMBJ75AHM3_A/I application, or SMBJ75AHM3_A/I equivalent, this device is selected for robust overvoltage protection in automotive-grade commercial systems where halogen-free, RoHS-compliant, AEC-Q101-qualified TVS performance and MSL Level 1 reflow compatibility are required.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 75 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns).
The device is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports continuous power dissipation of 5.0 W at TA = 50 °C, and maintains operation across -55 °C to +150 °C junction temperature range - enabling use in thermally demanding environments without derating below ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 83.3–92.1 V at IT = 1 mA - precise triggering threshold ensuring reliable activation above system nominal voltage |
| VC (Clamping Voltage) | 121 V at IPPM = 5.0 A - limits transient voltage seen by downstream ICs to survivable levels during 10/1000 µs surge |
| PPPM (Peak Pulse Power) | 600 W - sustains high-energy transients without failure; validated per ANSI/IEEE C62.35 standard |
| IPPM (Peak Pulse Current) | 5.0 A - maximum surge current handled at rated clamping voltage; derived from 10/1000 µs waveform test condition |
| TJmax | +150 °C - enables deployment in under-hood automotive or industrial enclosures without thermal shutdown risk |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated placement |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected circuit ground or lower-potential node; forms shunt path during transient |
| Cathode | Current exit terminal during forward conduction | Connected to protected line (e.g., 75 V rail); band-marked end identifies cathode per JEDEC DO-214AA convention |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy ESD and lightning-induced surges without degradation in industrial motor drives |
| AEC-Q101 qualified & halogen-free | Meets automotive reliability requirements and environmental compliance mandates for Tier-1 supply chain integration |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free reflow assembly without popcorn cracking or delamination in high-volume SMT production |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), critical for protecting high-speed interface ICs |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
|
Use Scenario: Protecting 24 V CAN/LIN bus transceivers and analog sensor front-ends from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between VCC rail and ground, triggered within nanoseconds to clamp transients to <121 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and signal conditioning ICs exposed to 12 V/24 V system-level surges. |
Use Scenario: Safeguarding 12 V power inputs of BCM modules against alternator load dump events (ISO 16750-2, Test 4a). IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power input, coordinated with upstream fusing and downstream LDOs. Use Value: Maintains functional safety integrity by limiting rail voltage excursion to 121 V during 100 ms, 120 V load dump surges. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Board |
|
Use Scenario: Guarding Ethernet PHY power supplies and RS-485 transceiver bias rails against induced lightning surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS on DC-DC converter outputs feeding communication ICs; complements primary AC-line protection. Use Value: Reduces system-level surge test failure rate by clamping common-mode transients to <121 V before reaching sensitive PHY silicon. |
Use Scenario: Securing 75 V DC bus in BLDC motor controllers against back-EMF spikes during commutation and brake events. IC Role / Device Role / Timing Role: Unidirectional shunt protector tied between motor driver high-side switch source and ground plane. Use Value: Extends MOSFET lifetime by limiting voltage stress during inductive turn-off to ≤121 V, avoiding avalanche overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHE3_A/I | Same electrical specs, RoHS-compliant but not halogen-free; uses standard tin-lead termination process | Lacks halogen-free certification; suitable for non-automotive commercial designs with less stringent material compliance | Select when AEC-Q101 qualification and halogen-free content are not required, and cost optimization is prioritized |
| SMBJ75CAHM3_A/I | Bidirectional variant with symmetrical VBR (83.3–92.1 V) and same clamping (121 V), but no polarity marking | Used in AC-coupled or differential signal lines (e.g., RS-485, USB D+/D−) requiring bidirectional surge handling | Choose only if circuit topology demands symmetrical clamping on both polarities - not a drop-in replacement for unidirectional use |
Compared with SMBJ75AHM3_A/I, the HE3 variant trades halogen-free compliance for lower cost in non-automotive settings, while the 75CAHM3 variant serves fundamentally different AC/bidirectional applications - neither offers pin-compatible substitution without circuit review.
Availability
SMBJ75AHM3_A/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line cards, and consumer appliance motor drive boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ75AHM3_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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series delivers standardized, high-power transient suppression for industrial and automotive systems - engineered for rapid response, repeatable clamping, and robust thermal performance in surface-mount power protection roles.
FAQ
What is the maximum clamping voltage of SMBJ75AHM3_A/I at its rated peak pulse current?
The SMBJ75AHM3_A/I has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components experience no more than 121 V during specified surge events. The SMBJ75AHM3_A/I's low incremental surge resistance contributes directly to this tightly controlled clamping behavior.
Is SMBJ75AHM3_A/I qualified for automotive applications?
Yes, SMBJ75AHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting automotive-grade reliability and environmental standards. Its construction includes glass-passivated junctions and MSL Level 1 reflow capability (260 °C peak), making it suitable for under-hood and body electronics. The "HM3" suffix explicitly denotes this automotive-compliant variant of the SMBJ75AHM3_A/I.
What does the "HM3" suffix indicate in SMBJ75AHM3_A/I?
The "HM3" suffix in SMBJ75AHM3_A/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade "E3" or non-automotive "M3" variants. It confirms compliance with JESD201 Class 2 whisker resistance, UL 94 V-0 flammability rating, and matte tin plating per J-STD-002. This suffix is integral to the SMBJ75AHM3_A/I part number and defines its material and qualification profile.
Can SMBJ75AHM3_A/I be used in bidirectional signal protection?
No, SMBJ75AHM3_A/I is a unidirectional TVS diode - its cathode band marks polarity, and it conducts only when anode is negative relative to cathode. For bidirectional protection (e.g., RS-485, AC lines), the SMBJ75CAHM3_A/I variant must be used instead. Using SMBJ75AHM3_A/I in bidirectional configurations risks reverse breakdown failure or inadequate clamping on negative transients.
What is the thermal resistance from junction to ambient for SMBJ75AHM3_A/I?
The SMBJ75AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2"). This value assumes standard SMB footprint layout and influences steady-state power derating - for example, at 50 °C ambient, the device supports 5.0 W continuous dissipation. RθJA is a key parameter for thermal design validation of the SMBJ75AHM3_A/I in enclosed or high-temperature environments.
SMBJ75AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ75AHM3_A/I FAQ
1.How can I place an order for SMBJ75AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3_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 SMBJ75AHM3_A/I reliable?
The price and inventory of SMBJ75AHM3_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 SMBJ75AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3_A/I?
SMBJ75AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3_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 SMBJ75AHM3_A/I?
For technical support, including SMBJ75AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ75AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3_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 SMBJ75AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3_A/I?
All SMBJ75AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3_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 SMBJ75AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ75AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3_A/I Tags
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