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Vishay General Semiconductor - Diodes Division SMCJ75CAHM3/I
- Part No.:
- SMCJ75CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CAHM3/I.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
SMCJ75CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 75 V standoff voltage (VWM), 121 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ75CAHM3/I datasheet, SMCJ75CAHM3/I pinout, SMCJ75CAHM3/I application, or SMCJ75CAHM3/I equivalent, this device is selected for robust bidirectional ESD/surge suppression in 12–48 V DC systems where AEC-Q101 qualification, low incremental surge resistance, and MSL Level 1 reliability are required.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns) to transient events.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = +150 °C. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive use - confirmed by HM3 suffix and ordering code structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 75 V - Maximum continuous reverse operating voltage before clamping begins; sets system operating margin for 48 V nominal bus applications. |
| VBR (Breakdown Voltage) | 83.3–92.1 V at IT = 1 mA - Confirmed minimum/maximum breakdown range ensuring reliable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 121 V at IPPM = 12.4 A - Peak voltage seen by protected circuit under 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capability per IEEE C62.35 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables deployment in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief; compatible with automated reflow assembly. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and HTRB; designated by HM3 suffix. |
Pinout & Package
SMCJ75CAHM3/I uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking; terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Current Input/Output | Either terminal accepts surge current in either direction; no polarity dependency - simplifies PCB layout for differential or floating nodes. |
| Terminal 2 | Transient Current Input/Output | Paired with Terminal 1 to complete bidirectional conduction path; identical electrical role - enables placement across any two points needing clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded sensor outputs without polarity concerns. |
| 1500 W Peak Pulse Power | Withstands 10/1000 µs surges up to 12.4 A while limiting clamped voltage to 121 V - sufficient for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Combination Wave testing. |
| AEC-Q101 Qualified (HM3) | Validated for automotive under-hood use including temperature cycling (-55 °C to +150 °C), HTRB, and mechanical shock - supports Tier-1 BOM requirements. |
| Low Incremental Surge Resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for sub-100 ns edge-sensitive circuits like microcontroller I/O. |
| MSL Level 1, 260 °C Reflow Compatible | Eliminates moisture sensitivity handling requirements and supports standard lead-free reflow profiles - reduces manufacturing complexity and cost. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 24 V/48 V battery-fed ECUs, body control modules, and lighting drivers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across power rail inputs to absorb >100 V transients before they reach LDOs or MCU power pins. Use Value: Prevents latch-up or permanent damage in automotive microcontrollers by limiting rail voltage to ≤121 V during ISO 7637-2 Pulse 5 events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA, 0–10 V) from ESD and field-induced surges in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground (or signal-to-signal) to shunt transients without distorting slow-varying analog waveforms. Use Value: Maintains signal integrity below 1% error while surviving contact discharge ≥8 kV per IEC 61000-4-2, thanks to sub-1 ns response and symmetrical clamping. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras, access points) against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary-stage TVS mounted at connector entry point to divert common-mode surges before reaching DC/DC converter input stage. Use Value: Enables compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) using a single discrete component - reduces BOM count vs. multi-stage designs. |
Use Scenario: Protecting gate drivers and half-bridge MOSFETs in washing machine or HVAC inverter boards from motor commutation spikes. IC Role / Device Role / Timing Role: Clamp placed across DC bus or gate-source nodes to suppress dV/dt-induced shoot-through and avalanche overstress. Use Value: Extends MOSFET lifetime by limiting transient voltage overshoot to <121 V during 100 A+ switching events - verified under 8.3 ms half-sine surge conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), non-AEC-Q101. | Suitable only for low-energy consumer applications; insufficient for automotive or industrial surge standards. | Select only for space-constrained, non-automotive designs where 1500 W rating is unnecessary. |
| SMCJ75CAHE3_A/I | Identical electrical specs and SMC package, but RoHS-compliant commercial grade (HE3) - lacks AEC-Q101 qualification and halogen-free status. | Acceptable for industrial control panels but not approved for automotive production programs requiring HM3 traceability. | Choose when AEC-Q101 and halogen-free compliance are not mandated - lower cost, same footprint. |
Compared with SMCJ75CAHM3/I, SMAJ75CA-E3/57T offers reduced surge capacity and thermal performance, while SMCJ75CAHE3_A/I matches form/fit/function but omits automotive qualification - making SMCJ75CAHM3/I the sole option meeting full AEC-Q101 + halogen-free + 1500 W requirements.
Availability
SMCJ75CAHM3/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom DC feeds, and appliance motor control requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ75CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMCJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be mitigated without compromising signal integrity or thermal stability.
FAQ
What is the clamping voltage of SMCJ75CAHM3/I at its rated peak pulse current?
The SMCJ75CAHM3/I has a maximum clamping voltage (VC) of 121 V at its specified peak pulse current (IPPM) of 12.4 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ75CAHM3/I maintains this clamping performance across its full operating temperature range.
Is SMCJ75CAHM3/I suitable for automotive applications?
Yes, SMCJ75CAHM3/I is explicitly qualified to AEC-Q101 and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and humidity testing - making it approved for use in engine control units, ADAS modules, and body electronics where long-term reliability under thermal and mechanical stress is mandatory. The SMCJ75CAHM3/I meets these requirements without derating.
How does the bidirectional design of SMCJ75CAHM3/I affect its circuit placement?
The bidirectional architecture of SMCJ75CAHM3/I eliminates polarity constraints - it can be placed across any two nodes requiring symmetrical overvoltage protection, such as differential signal pairs (CAN_H/CAN_L), AC-coupled lines, or ungrounded power rails. Unlike unidirectional TVS diodes, the SMCJ75CAHM3/I requires no cathode band orientation check during placement, reducing assembly errors and enabling simplified layout for floating or isolated domains.
What thermal derating applies to SMCJ75CAHM3/I above 25 °C ambient?
SMCJ75CAHM3/I follows standard derating per Figure 2 in its datasheet: peak pulse power decreases linearly above TA = 25 °C, reaching ~50% of 1500 W at TA = 100 °C when mounted on recommended 8.0 mm × 8.0 mm copper pads. Its RθJA of 75 °C/W and RθJL of 15 °C/W define heat dissipation limits - sustained power dissipation must stay below 6.5 W at TA = 50 °C. These values are validated for the SMCJ75CAHM3/I's specific SMC package and metallization.
Does SMCJ75CAHM3/I meet UL 497B recognition?
Yes, SMCJ75CAHM3/I carries Underwriters Laboratories recognition under UL 497B (file E136766) for protector classification QVGQ2, covering both unidirectional and bidirectional configurations. This certification confirms its suitability for primary and secondary circuit protection in telecommunications and data line applications - a requirement for many North American telecom equipment approvals. The SMCJ75CAHM3/I achieves this with its standardized SMC package and tested clamping performance.
SMCJ75CAHM3/I 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ75CAHM3/I FAQ
1.How can I place an order for SMCJ75CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CAHM3/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 SMCJ75CAHM3/I reliable?
The price and inventory of SMCJ75CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ75CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CAHM3/I?
SMCJ75CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CAHM3/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 SMCJ75CAHM3/I?
For technical support, including SMCJ75CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CAHM3/I requirements.
6.How does Aetrix verify that SMCJ75CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ75CAHM3/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 SMCJ75CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ75CAHM3/I?
All SMCJ75CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CAHM3/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 SMCJ75CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ75CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75CAHM3/I Tags
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