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Vishay General Semiconductor - Diodes Division SMBJ75AHM3_A/H
- Part No.:
- SMBJ75AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ75AHM3_A/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,544
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Product details
Overview
SMBJ75AHM3_A/H 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 ESD, lightning-induced surges, and inductive switching transients. 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/H datasheet, SMBJ75AHM3_A/H pinout, SMBJ75AHM3_A/H application, or SMBJ75AHM3_A/H equivalent, this device is evaluated for overvoltage protection in automotive-grade embedded systems, industrial I/O modules, and telecom line-card surge immunity where halogen-free, AEC-Q101-qualified TVS performance and MSL Level 1 reflow compatibility are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 µA leakage at 75 V), then rapidly transitions to low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy to safe levels via controlled avalanche breakdown. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Thermally, it delivers 5.0 W steady-state power dissipation at 50 °C ambient on infinite heatsink, with RθJA = 100 °C/W and RθJL = 20 °C/W, enabling robust thermal management in compact PCB layouts. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - validated for automotive electronics per JESD22-B102 whisker testing and J-STD-020 MSL Level 1 (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC working range on protected line |
| VBR (min/max) | 83.3 V / 92.1 V at 1.0 mA - guaranteed avalanche initiation window; ensures consistent turn-on across temperature and unit variation |
| VC @ IPPM | 121 V at 5.0 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 600 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity with appropriate layout |
| IFSM | 100 A - non-repetitive forward surge rating (8.3 ms half-sine); enables use in DC power rail protection with inrush tolerance |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 3.9 mm footprint and 2.2 mm height; compatible with automated SMT placement |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity marked by cathode band on one end. Matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, MSL Level 1 compliant (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during transient events |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 75 V supply rail or sensor output); avalanche conduction initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling - enables use in ADAS and body control modules |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for EU, China RoHS, and JEITA; eliminates brominated flame retardants without sacrificing UL 94 V-0 flammability rating |
| 600 W 10/1000 µs pulse rating | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) with proper PCB trace inductance and grounding strategy |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during clamping - critical for protecting 75 V-rated MOSFETs and gate drivers in motor control inverters |
| MSL Level 1 reflow compatibility | Enables single-pass lead-free reflow assembly at 260 °C peak without popcorn cracking or delamination risk |
Applications
| Industrial Sensor Interface Protection | Automotive Power Rail Clamping |
|---|---|
Use Scenario: Protecting 75 V CAN FD or LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in factory automation equipment. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before they reach signal conditioning ICs or microcontrollers. Use Value: Limits induced voltage to ≤121 V during 5 A surge, preserving integrity of 80 V-rated op-amps and ADC inputs while maintaining <1 µA leakage at nominal 75 V operation. | Use Scenario: Safeguarding 75 V auxiliary power supplies in electric vehicle battery management systems (BMS) and 48 V mild-hybrid ECUs against ISO 7637-2 Pulse 5a/b load dump events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input rail, coordinated with upstream fusing and downstream DC-DC converters. Use Value: Withstands 100 A forward surge (8.3 ms) and clamps 600 W transients within 1 ns response time, preventing latch-up or destruction of 100 V MOSFETs in power stage circuits. |
| Telecom Line Card Surge Suppression | Renewable Energy Inverter DC Link Protection |
Use Scenario: Shielding Ethernet PHYs, PoE injectors, and baseband processors on outdoor telecom base station line cards exposed to lightning-induced common-mode surges on copper pairs. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated DC bias rails and data line terminations, supplementing primary gas discharge tube (GDT) protection. Use Value: Provides sub-100 ps response and <121 V clamping to prevent damage to 100BASE-TX magnetics and PHY ICs rated for 85 V absolute maximum, while supporting 1000+ surge cycles. | Use Scenario: Protecting DC link capacitors and IGBT gate drivers in solar string inverters operating at nominal 75 V DC input from grid-switching transients and PV array fault currents. IC Role / Device Role / Timing Role: Fast-acting parallel clamp on DC bus, placed adjacent to power semiconductor modules to minimize loop inductance. Use Value: Delivers 600 W pulse handling with 20 °C/W junction-to-lead thermal resistance, enabling effective heat transfer to copper pour and sustaining reliability under repeated 10/1000 µs surges in outdoor enclosures. |
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/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not halogen-free or AEC-Q101 qualified) | Lacks automotive qualification and halogen-free certification; suitable for industrial/commercial designs without automotive compliance needs | Select when AEC-Q101 and halogen-free requirements are not mandated, prioritizing cost-sensitive non-automotive BOMs |
| SMAJ75A-M3/A | Lower 400 W PPPM, SMA (DO-214AC) package (smaller footprint, lower thermal mass), same VWM/VBR range | Reduced surge margin and higher RθJA; limited to lower-energy transients or space-constrained consumer applications | Choose only if board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 (1 kV), accepting reduced thermal robustness |
Compared with SMBJ75AHE3_A/H and SMAJ75A-M3/A, SMBJ75AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 600 W surge capability in the SMB outline - making it the preferred choice for automotive and high-reliability industrial deployments where regulatory compliance and sustained surge endurance are mandatory.
Availability
SMBJ75AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and renewable energy inverters requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMBJ75AHM3_A/H 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, efficiency, and application-specific optimization.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, high-energy transient suppression in automotive, industrial, and telecom infrastructure - balancing fast response, precise clamping, and long-life surge endurance.
FAQ
What is the maximum clamping voltage of SMBJ75AHM3_A/H at its rated peak pulse current?
The SMBJ75AHM3_A/H has a maximum clamping voltage (VC) of 121 V at 5.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping performance is guaranteed across the full operating temperature range and is integral to the device's ability to safeguard 80 V-rated components in systems such as automotive power rails and industrial sensor interfaces. SMBJ75AHM3_A/H maintains this specification consistently due to its glass-passivated junction and AEC-Q101-qualified process control.
Is SMBJ75AHM3_A/H suitable for automotive applications?
Yes, SMBJ75AHM3_A/H is explicitly qualified to AEC-Q101 standards, confirmed by the "HM3" suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - validating reliability in under-hood and chassis-mounted automotive environments. SMBJ75AHM3_A/H is deployed in ADAS camera modules, body control units, and 48 V/75 V power distribution systems where compliance with automotive quality and longevity requirements is mandatory.
What does the "HM3" suffix indicate in SMBJ75AHM3_A/H?
The "HM3" suffix in SMBJ75AHM3_A/H specifies halogen-free, RoHS-compliant, and AEC-Q101-qualified construction - distinguishing it from commercial-grade variants like "E3" or "HE3". It confirms compliance with JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow), JESD22-B102 whisker resistance, and UL 94 V-0 flammability rating of the molding compound. SMBJ75AHM3_A/H meets automotive environmental and safety standards without trade-offs in electrical performance, delivering identical VWM, VBR, and PPPM ratings as its non-automotive counterparts.
How does SMBJ75AHM3_A/H compare to SMBJ75AHE3_A/H in terms of compliance and use cases?
SMBJ75AHM3_A/H adds halogen-free formulation and AEC-Q101 qualification to the baseline SMBJ75AHE3_A/H specifications, while retaining identical electrical parameters (75 V VWM, 83.3–92.1 V VBR, 121 V VC). SMBJ75AHM3_A/H is required for automotive Tier 1 suppliers and industrial applications demanding extended temperature reliability and green material compliance. SMBJ75AHE3_A/H remains viable for commercial-grade designs where those certifications are unnecessary. Both share the same SMB (DO-214AA) package and mounting footprint, enabling design reuse where compliance scope permits.
What is the thermal resistance profile of SMBJ75AHM3_A/H, and how does it impact PCB layout?
SMBJ75AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. These values dictate that effective thermal relief requires generous copper pour connected to both anode and cathode pads, especially in high-duty-cycle surge environments. For continuous 5.0 W dissipation, PCB layout must prioritize thermal vias and inner-layer copper planes. SMBJ75AHM3_A/H's low RθJL enables efficient heat transfer to the PCB substrate, supporting reliable operation in enclosed industrial enclosures up to +85 °C ambient.
SMBJ75AHM3_A/H 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/H FAQ
1.How can I place an order for SMBJ75AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ75AHM3_A/H 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/H reliable?
The price and inventory of SMBJ75AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ75AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ75AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ75AHM3_A/H?
SMBJ75AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ75AHM3_A/H 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/H?
For technical support, including SMBJ75AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ75AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ75AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ75AHM3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ75AHM3_A/H?
All SMBJ75AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ75AHM3_A/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ75AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ75AHM3_A/H Tags
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