My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ120CAHM3_A/H
- Part No.:
- SMCJ120CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ120CAHM3_A/H.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,168
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ120CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 193 V clamping voltage at 7.8 A peak pulse current, and 120 V standoff voltage. 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 SMCJ120CAHM3_A/H datasheet, SMCJ120CAHM3_A/H pinout, SMCJ120CAHM3_A/H application, or SMCJ120CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and thermal resistance of 75 °C/W junction-to-ambient under standard pad layout.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding 120 V, it avalanches to limit voltage across protected circuitry to ≤193 V within nanoseconds. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 120 V), while the bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns.
The SMCJ120CAHM3_A/H is rated for 1500 W peak pulse power (10/1000 μs waveform), derates linearly above 25 °C ambient per Fig. 2, and supports operating junction temperatures from –55 °C to +150 °C. Its MSL Level 1 rating and matte tin-plated leads comply with J-STD-002 solderability and JESD 22-B102 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 120 V - Maximum continuous reverse voltage before clamping initiates; defines upper limit of normal operating range. |
| Clamping Voltage (VC) | 193 V at 7.8 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines minimum required voltage margin for downstream components. |
| Peak Pulse Power (PPPM) | 1500 W - Energy-handling capacity for standardized 10/1000 μs transient; defines robustness against IEC 61000-4-5 Level 4 surges. |
| Breakdown Voltage (VBR) | 133–147 V at 1 mA - Voltage at which avalanche conduction begins; confirms tight tolerance (±5%) for predictable turn-on behavior. |
| Junction Temperature Range | –55 °C to +150 °C - Specifies full operational reliability across automotive under-hood and industrial control environments. |
| Thermal Resistance (RθJA) | 75 °C/W - Junction-to-ambient thermal impedance on 8 mm × 8 mm copper pads; used to calculate temperature rise under DC bias or repetitive pulses. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTOL, TC, and HTRB. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H). No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Acts as cathode during positive half-cycle; forms symmetrical clamping path with cathode terminal. |
| Cathode | Transient current entry (bidirectional) | Acts as anode during negative half-cycle; enables identical clamping in both directions without external polarity management. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC, differential, or floating bus lines without polarity constraints or additional components. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body electronics, and ADAS modules subject to extended temperature cycling and humidity exposure. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and end-of-life recycling requirements. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 rating | Permits unlimited floor life and reflow at 260 °C peak without baking, simplifying SMT assembly for high-volume production. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protection of 12 V/24 V power rails feeding ECUs, lighting controllers, and infotainment head units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS device clamping transients to safe levels before they reach downstream regulators and microcontrollers. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic supplies during ISO 16750-2 load dump events up to 35 V for 400 ms. | Use Scenario: Guarding analog input channels of PLC I/O modules connected to 4–20 mA current loops exposed to field wiring surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair to absorb common-mode transients without disrupting DC bias. Use Value: Maintains signal integrity below ±10 V common-mode range while suppressing >1 kV EFT bursts per IEC 61000-4-4. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding Ethernet PHY interface transformers and PoE injectors from induced surges on outdoor cabling per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS placed at connector side of isolation transformer to divert surge energy before reaching magnetics and PHY IC. Use Value: Limits coupled surge voltage to <200 V at transformer secondary, preserving 100BASE-TX PHY's 2.5 V tolerance. | Use Scenario: Safeguarding gate drivers and bootstrap circuits in BLDC motor inverters inside washing machines and HVAC compressors. IC Role / Device Role / Timing Role: Bidirectional clamp across high-side and low-side driver supply rails to suppress shoot-through-inducing voltage spikes. Use Value: Reduces risk of false triggering in half-bridge gate drivers during commutation transients up to 1.2 kV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120CAHE3_A/H | Lower PPPM (400 W), same VWM (120 V), SMA package (smaller footprint, higher RθJA = 110 °C/W). | Suitable only for lower-energy transients (IEC 61000-4-2 contact discharge ≤8 kV); not recommended for load dump or lightning surge scenarios. | Select when board space is constrained and surge threat level is limited to ESD-only environments. |
| SMCJ120AHE3_A/H | Unidirectional version; identical VWM, VC, and PPPM but requires correct polarity placement and cannot protect AC signals. | Applicable only on DC-biased rails where reverse polarity is impossible; adds design risk if misoriented during assembly. | Choose only when protecting unidirectional power rails with known polarity and no AC coupling requirements. |
Compared with SMCJ120CAHM3_A/H, SMAJ120CAHE3_A/H trades surge robustness for compactness, while SMCJ120AHE3_A/H sacrifices bidirectional flexibility for identical clamping performance on polarized lines-making the original the optimal choice for automotive and industrial AC-coupled or floating interfaces requiring full AEC-Q101 validation.
Availability
SMCJ120CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O conditioning, telecom line interface hardening, and consumer appliance motor drive inputs requiring stable component supply across multi-year production cycles.
Supply support for SMCJ120CAHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, AEC-Q qualified components for automotive and industrial markets.
The SMCJ series targets high-energy transient suppression in harsh environments, delivering 1500 W surge capability in rugged SMC packaging with validated automotive qualification and halogen-free compliance.
FAQ
What is the clamping voltage of the SMCJ120CAHM3_A/H under a 10/1000 μs surge?
The SMCJ120CAHM3_A/H clamps to a maximum of 193 V when subjected to its rated 7.8 A peak pulse current (IPPM) using the standard 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. The SMCJ120CAHM3_A/H maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is the SMCJ120CAHM3_A/H suitable for automotive applications?
Yes, the SMCJ120CAHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS modules. Its halogen-free, RoHS-compliant construction (HM3 suffix), MSL Level 1 rating, and validated performance across –55 °C to +150 °C junction temperature make the SMCJ120CAHM3_A/H compliant with automotive manufacturing and reliability requirements.
How does the bidirectional configuration of the SMCJ120CAHM3_A/H affect circuit design?
The bidirectional configuration of the SMCJ120CAHM3_A/H eliminates polarity sensitivity, allowing placement across AC-coupled lines, differential pairs, or floating buses without orientation constraints. Unlike unidirectional variants, the SMCJ120CAHM3_A/H provides symmetrical clamping in both directions-critical for protecting RS-485, CAN FD, or sensor bridge outputs where voltage reversals occur. No cathode band marking is present on the SMCJ120CAHM3_A/H package.
What is the thermal resistance of the SMCJ120CAHM3_A/H, and how does it impact layout?
The SMCJ120CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes the standard pad layout shown in the Vishay datasheet; reducing pad area increases thermal resistance and may cause premature thermal shutdown during repetitive surges. Layout must replicate the specified copper area to ensure the SMCJ120CAHM3_A/H meets its 1500 W pulse rating and 150 °C max junction temperature.
Does the SMCJ120CAHM3_A/H have a defined leakage current specification at its standoff voltage?
Yes, the SMCJ120CAHM3_A/H specifies a maximum reverse leakage current (ID) of 1.0 μA at its 120 V standoff voltage (VWM), measured at 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on monitoring circuits or high-impedance sensor interfaces. Leakage remains below 5 μA up to 100 °C ambient, supporting reliable operation in thermally demanding environments where the SMCJ120CAHM3_A/H is deployed.
SMCJ120CAHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMCJ120CAHM3_A/H FAQ
1.How can I place an order for SMCJ120CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ120CAHM3_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 SMCJ120CAHM3_A/H reliable?
The price and inventory of SMCJ120CAHM3_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 SMCJ120CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ120CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ120CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ120CAHM3_A/H?
SMCJ120CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ120CAHM3_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 SMCJ120CAHM3_A/H?
For technical support, including SMCJ120CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ120CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ120CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ120CAHM3_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 SMCJ120CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ120CAHM3_A/H?
All SMCJ120CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ120CAHM3_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 SMCJ120CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ120CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ120CAHM3_A/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
