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Vishay General Semiconductor - Diodes Division SMCJ75AHM3/H
- Part No.:
- SMCJ75AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AHM3/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,477
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Product details
Overview
SMCJ75AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It clamps transients to ≤121 V at 12.4 A peak pulse current and operates from –55 °C to +150 °C, targeting automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ75AHM3/H datasheet, SMCJ75AHM3/H pinout, SMCJ75AHM3/H application, or SMCJ75AHM3/H equivalent, this halogen-free, RoHS-compliant, AEC-Q101 qualified device delivers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD/surge resilience in engine control units and ADAS sensor front-ends.
Technical Context
The SMCJ75AHM3/H uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages, with bidirectional capability excluded by its unidirectional polarity (cathode band marked). Its thermal design relies on low RθJL = 15 °C/W to leads and RθJA = 75 °C/W to ambient on standard 8.0 mm × 8.0 mm copper pads.
It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance, supporting reliable operation under repetitive surge stress per IEC 61000-4-5 and ISO 7637-2 when mounted per recommended pad layout - no derating required up to TA = 50 °C for continuous 6.5 W dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal operating range. |
| VBR @ IT = 1 mA | 83.3–92.1 V - Verified breakdown threshold at test current; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM = 12.4 A | ≤121 V - Clamped voltage under 1500 W surge (10/1000 µs); defines worst-case stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports robust protection against lightning-induced surges and load dump transients. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without thermal derating penalties. |
| Package | SMC (DO-214AB) - Surface-mount outline with 0.320" body length and matte tin-plated leads; compatible with automated reflow assembly per J-STD-020. |
Pinout & Package
SMCJ75AHM3/H is housed in an SMC (DO-214AB) package with two terminals: cathode (marked with band) and anode. The device is unidirectional; polarity must be observed during PCB layout to ensure correct clamping direction relative to protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path | Connected to system ground or low-impedance reference; conducts surge current away from protected IC when VIN exceeds VWM. |
| Anode | Protected line input | Connected to power rail or signal line requiring clamping; reverse-biased during normal operation, forward-conducting only during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, infotainment, and ADAS sensors per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations (Vishay HM3 suffix); eliminates brominated flame retardants without compromising UL 94 V-0 flammability rating. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 30 V) and higher energy absorption efficiency versus legacy TVS devices. |
| MSL Level 1 (260 °C peak) | Allows single-reflow soldering without baking; simplifies manufacturing for high-volume automotive electronics production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping transients within 1 ns to prevent latch-up or gate oxide damage. Use Value: Withstands 1500 W pulses while limiting voltage to ≤121 V - preserving MCU reset logic and analog front-end integrity under harsh vehicle electrical conditions. | Use Scenario: Shielding 4–20 mA current loop transmitters and RTD interfaces from EFT (IEC 61000-4-4) and surge (IEC 61000-4-5). IC Role / Device Role / Timing Role: Mounted across supply rails or signal lines to shunt fast transients before they reach precision op-amps or ADC inputs. Use Value: Low leakage (<1 µA at 75 V) avoids measurement drift; stable VBR tolerance (±5%) ensures repeatable protection threshold across temperature. |
| Telecom DC Power Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-powered Ethernet switches and base station power supplies against AC line coupling and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input, coordinated with upstream fuses and downstream TVS arrays for staged clamping. Use Value: 1500 W rating handles multi-kV surges; UL 497B recognition validates compliance with telecom safety standards. | Use Scenario: Suppressing inductive kickback from BLDC motor drivers in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Connected across H-bridge high-side FET drains and ground to clamp flyback spikes during PWM switching. Use Value: Fast response (<1 ns) prevents MOSFET avalanche failure; 200 A IFSM rating accommodates repeated motor stall currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHE3/A | Same VWM/VBR/PPPM, but SMB (DO-214AA) package - 30% smaller footprint, lower IPPM (10.3 A), higher VC (126 V). | Limited to lower-energy surges; unsuitable for ISO 7637-2 load dump where SMCJ75AHM3/H's 12.4 A IPPM is required. | Select SMBJ75AHE3/A only if board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4. |
| SMCJ75A-M3/57T | Identical electrical specs and SMC package, but commercial-grade (non-AEC-Q101) and halogen-free (M3), no automotive qualification. | Not approved for automotive under-hood use; acceptable for industrial or consumer applications with less stringent reliability requirements. | Choose SMCJ75A-M3/57T for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMBJ75AHE3/A and SMCJ75A-M3/57T, the SMCJ75AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1500 W surge capability in the SMC package - making it the only option validated for demanding automotive power rail protection where both reliability and energy handling are non-negotiable.
Availability
SMCJ75AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and appliance motor drives requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for SMCJ75AHM3/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, MOSFETs, and protection devices with emphasis on high-reliability, automotive-qualified components.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in automotive, industrial, and telecom infrastructure where robustness against ISO 7637-2, IEC 61000-4-5, and lightning surges is mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ75AHM3/H under rated surge conditions?
The SMCJ75AHM3/H clamps to a maximum of 121 V when subjected to its rated 12.4 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured and guaranteed per Vishay Document 88394, ensuring downstream ICs see no more than 121 V during surge events - critical for protecting 100 V-rated automotive microcontrollers and CAN transceivers. The SMCJ75AHM3/H achieves this with low incremental resistance and stable thermal behavior up to +150 °C junction temperature.
Is the SMCJ75AHM3/H suitable for automotive under-hood applications?
Yes, the SMCJ75AHM3/H is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C, making it suitable for under-hood automotive applications such as engine control modules, transmission control units, and ADAS sensor power conditioning. Its halogen-free HM3 suffix, UL 497B recognition, and validation against load dump (ISO 7637-2 Pulse 5a) confirm its readiness for harsh automotive environments - a key differentiator of the SMCJ75AHM3/H versus commercial-grade alternatives.
How does the SMCJ75AHM3/H differ from the SMCJ75A-E3/57T?
The SMCJ75AHM3/H differs from SMCJ75A-E3/57T in three key ways: it carries the HM3 suffix indicating halogen-free construction, includes AEC-Q101 qualification (denoted by "H" in the suffix), and ships in 7" tape-and-reel (H package code). In contrast, SMCJ75A-E3/57T is RoHS-compliant but not halogen-free or automotive-qualified. Both share identical electrical specs and SMC packaging, but only the SMCJ75AHM3/H meets full automotive reliability requirements - essential for OEM-tier designs.
What is the thermal resistance from junction to lead for the SMCJ75AHM3/H?
The SMCJ75AHM3/H has a typical thermal resistance from junction to lead (RθJL) of 15 °C/W, as specified in Vishay Document 88394. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the leads, supporting sustained 6.5 W power dissipation at TA = 50 °C. When designing layouts for the SMCJ75AHM3/H, maintaining minimum 8.0 mm × 8.0 mm copper pads per terminal is required to achieve this RθJL and avoid thermal derating.
Does the SMCJ75AHM3/H have polarity marking, and how is it oriented on the PCB?
Yes, the SMCJ75AHM3/H features a visible cathode band on the SMC (DO-214AB) package body - the banded end is the cathode terminal and must be connected to system ground or the lower-potential node in the protected circuit. This unidirectional polarity ensures proper clamping action: when the anode voltage rises above VWM (75 V), the device avalanches and shunts surge current to ground. Incorrect orientation will prevent protection and may cause catastrophic failure - always verify band alignment per the SMCJ75AHM3/H mechanical drawing in Document 88394.
SMCJ75AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 12.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ75AHM3/H FAQ
1.How can I place an order for SMCJ75AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AHM3/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 SMCJ75AHM3/H reliable?
The price and inventory of SMCJ75AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ75AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AHM3/H?
SMCJ75AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AHM3/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 SMCJ75AHM3/H?
For technical support, including SMCJ75AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AHM3/H requirements.
6.How does Aetrix verify that SMCJ75AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ75AHM3/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 SMCJ75AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ75AHM3/H?
All SMCJ75AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AHM3/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 SMCJ75AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ75AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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