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Vishay General Semiconductor - Diodes Division SMCJ75CAHM3/H
- Part No.:
- SMCJ75CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CAHM3/H.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,877
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Product details
Overview
SMCJ75CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 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) with 10/1000 µs waveform - deployed in automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ75CAHM3/H datasheet, SMCJ75CAHM3/H pinout, SMCJ75CAHM3/H application, or SMCJ75CAHM3/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under PCB pad-limited conduction.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding 75 V, it avalanches symmetrically in both directions to clamp voltage at ≤121 V while diverting up to 12.4 A (10/1000 µs). Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM).
Designed for surface-mount automated assembly, the SMCJ75CAHM3/H meets MSL Level 1 (260 °C peak reflow) and JESD201 Class 2 whisker resistance. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 83.3 V / 92.1 V at 1 mA - verified breakdown threshold range ensuring consistent avalanche onset |
| VC @ IPPM | 121 V at 12.4 A - clamping voltage under full 1500 W surge, defining protected circuit's worst-case overvoltage |
| PPPM | 1500 W - peak pulse power handling capability with standard 10/1000 µs waveform |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserving signal integrity and standby power in always-on systems |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One end of the symmetrical PN junction; connects to line under protection |
| Terminal 2 | Cathode (bidirectional) | Other end of the symmetrical PN junction; connects to reference (e.g., ground or rail) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both polarities - enables single-device protection of AC-coupled or floating lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics - supports PPAP documentation and long-term reliability in harsh environments |
| Halogen-free & RoHS | HM3 suffix confirms compliant materials - satisfies EU ELV, China RoHS, and OEM sustainability requirements |
| Low incremental surge resistance | Enables tight VC tolerance and predictable clamping - critical for protecting 3.3 V/5 V logic interfaces downstream |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without preconditioning - simplifies high-volume SMT manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-supplied ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Shunt TVS placed between power rail and ground to clamp surges before they reach PMICs or microcontrollers. Use Value: Limits voltage to ≤121 V during 1500 W transients, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V ICs. |
Use Scenario: Analog output lines (e.g., 4–20 mA current loop or 0–10 V sensor outputs) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional TVS across signal and return paths to suppress ESD (IEC 61000-4-2) and inductive switching noise. Use Value: Sub-µA leakage preserves mA-level accuracy; symmetrical clamping avoids DC offset in bipolar signal paths. |
| Telecom DC Power Interface | Consumer USB-C Port VBUS Protection |
Use Scenario: -48 V telecom rectifier outputs feeding base station backplanes subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge limiter on input side of DC-DC converters, coordinated with secondary TVS stages. Use Value: 1500 W PPPM handles multi-kA induced surges; 150 °C TJ rating supports operation in sealed outdoor enclosures. |
Use Scenario: VBUS line in USB-C receptacles where hot-plug events and cable ESD pose risk to port controllers and PD controllers. IC Role / Device Role / Timing Role: Fast-response shunt device placed upstream of USB-C controller to clamp ESD and overvoltage before IC input pins. Use Value: 121 V clamping protects 20 V-rated USB-PD PHYs; DO-214AB footprint allows compact layout near connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CAHM3 | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a compliance | Select when space-constrained layouts prioritize footprint over surge margin |
| SMCJ75AHE3 | Unidirectional version; identical VWM/VC/PPPM but cathode-marked; RoHS-compliant but not halogen-free or AEC-Q101 qualified | Requires correct polarity placement; lacks automotive qualification and halogen-free certification | Select only for non-automotive commercial designs where polarity is fixed and material compliance is less stringent |
Compared with SMCJ75CAHM3/H, SMBJ75CAHM3 offers reduced surge capacity in a smaller package, while SMCJ75AHE3 sacrifices bidirectionality and automotive qualification for cost-sensitive commercial use - making SMCJ75CAHM3/H the sole choice for AEC-Q101–mandated, polarity-agnostic, high-power transient suppression.
Availability
SMCJ75CAHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power interfaces, and consumer USB-C power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ75CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under repetitive surge stress and extended temperature operation.
FAQ
What does the "HM3" suffix indicate for SMCJ75CAHM3/H?
The HM3 suffix on SMCJ75CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with automotive reliability standards and environmental regulations including EU ELV and China RoHS. This distinguishes SMCJ75CAHM3/H from commercial-grade variants like SMCJ75CA-E3 and ensures suitability for under-hood and safety-critical vehicle systems.
Is SMCJ75CAHM3/H bidirectional, and how does that affect its circuit placement?
Yes, SMCJ75CAHM3/H is a bidirectional TVS diode - meaning it clamps voltage symmetrically in both polarities without polarity marking. This allows placement across any two nodes requiring surge protection regardless of DC bias direction, such as AC-coupled data lines, floating sensor outputs, or dual-rail power domains. No orientation check is needed during placement.
What is the maximum clamping voltage of SMCJ75CAHM3/H under rated surge conditions?
The maximum clamping voltage (VC) of SMCJ75CAHM3/H is 121 V when subjected to its rated 12.4 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during a full 1500 W transient event.
Can SMCJ75CAHM3/H be used in place of unidirectional SMCJ75A variants?
No - SMCJ75CAHM3/H is not a drop-in replacement for unidirectional SMCJ75A variants. While both share VWM (75 V) and PPPM (1500 W), the unidirectional version requires correct cathode orientation and cannot protect against reverse-polarity transients. Substituting SMCJ75CAHM3/H demands verification that bidirectional clamping aligns with system-level protection architecture.
What thermal derating applies to SMCJ75CAHM3/H above 25 °C ambient?
SMCJ75CAHM3/H must be derated linearly above TA = 25 °C per Figure 2 in the Vishay datasheet. With RθJA = 75 °C/W, its power dissipation drops from 6.5 W at 50 °C ambient to zero at 150 °C junction temperature. For sustained operation, ensure PCB copper pad area (minimum 8 mm × 8 mm per terminal) and airflow meet thermal design targets to maintain TJ ≤ 150 °C.
SMCJ75CAHM3/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:
- -
- 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/H FAQ
1.How can I place an order for SMCJ75CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CAHM3/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 SMCJ75CAHM3/H reliable?
The price and inventory of SMCJ75CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ75CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CAHM3/H?
SMCJ75CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CAHM3/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 SMCJ75CAHM3/H?
For technical support, including SMCJ75CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CAHM3/H requirements.
6.How does Aetrix verify that SMCJ75CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ75CAHM3/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 SMCJ75CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ75CAHM3/H?
All SMCJ75CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CAHM3/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 SMCJ75CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ75CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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