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Vishay General Semiconductor - Diodes Division 1.5SMC120CA-M3/9AT
- Part No.:
- 1.5SMC120CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CA-M3/9AT.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,654
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Product details
Overview
1.5SMC120CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 120 V standoff voltage (VWM), 133 V minimum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It clamps transients to ≤165 V at 9.1 A peak pulse current and operates from −65 °C to +150 °C - deployed for surge protection on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC120CA-M3/9AT datasheet, 1.5SMC120CA-M3/9AT pinout, 1.5SMC120CA-M3/9AT application, or 1.5SMC120CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, 165 V max clamping voltage at 9.1 A, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification eligibility, and SMC package thermal resistance of 75 °C/W.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients. Its symmetrical breakdown behavior ensures identical clamping in both polarities, with no polarity marking required on the device body.
The 1.5SMC120CA-M3/9AT is rated for 1500 W peak pulse power under standardized 10/1000 μs waveform conditions, derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 102 V - Maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuit. |
| VBR (Breakdown) | 114–126 V at 1 mA - Confirmed breakdown threshold range; ensures reliable conduction onset during overvoltage events. |
| VC (Clamping) | ≤165 V at IPPM = 9.1 A - Measured maximum voltage across device during 10/1000 μs surge; determines stress on downstream ICs. |
| PPPM | 1500 W - Peak transient energy absorption capacity under standard waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID (Leakage) | ≤1 μA at 102 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.305" × 0.220" (7.75 mm × 5.59 mm) body size, 0.126" (3.20 mm) minimum terminal length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common node for bidirectional conduction path | Terminal conducts during positive half-cycle surges and forms one side of symmetrical clamping structure. |
| Cathode | Current exit point in forward bias; common node for bidirectional conduction path | Terminal conducts during negative half-cycle surges; electrically identical to Anode in bidirectional configuration - no band marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both polarities - eliminates need for polarity-aware layout or orientation verification. |
| 1500 W peak pulse rating | Withstands 10/1000 μs surges up to 9.1 A without degradation - suitable for IEC 61000-4-5 line-to-line surge testing. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for automotive and industrial OEMs without compromising thermal or electrical performance. |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60 % RH - enables direct placement without baking or dry-pack handling. |
| AEC-Q101 qualification path | Base P/NHM3_X variant available with full automotive qualification - allows drop-in upgrade for safety-critical applications. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching signal conditioning ICs. Use Value: Limits transient voltage to ≤165 V, preventing latch-up or permanent damage to 5 V or 3.3 V interface ICs while maintaining <1 μA leakage at 102 V. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary front-end TVS on each channel, mounted adjacent to terminal block to intercept surges before optocoupler or Schmitt trigger input stages. Use Value: Absorbs 1500 W peak energy without failure, ensuring >100,000 surge cycles per channel and supporting 0.01 % duty cycle repetitive operation. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced common-mode transients on outdoor cabling. IC Role / Device Role / Timing Role: Common-mode TVS pair (one per line) referenced to chassis ground, providing symmetrical clamping on differential pairs. Use Value: Delivers matched 114–126 V VBR and ≤165 V VC in both directions - maintains signal integrity and prevents differential skew during surge events. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Snubber-grade TVS across motor terminals or flyback path, activated only during commutation transients exceeding 102 V. Use Value: Clamps 10/1000 μs spikes to ≤165 V within <1 ns, protecting 3.3 V MCU I/O pins and eliminating need for external RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | Same VWM (102 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 4 or automotive load-dump scenarios | Select when board space is constrained and surge threat level is ≤600 W (e.g., internal PCB traces only). |
| 1.5KE120CA | Same VWM and PPPM, but through-hole DO-201AE package; higher mounting thermal resistance | Requires wave soldering or hand assembly; incompatible with fully SMT production lines | Choose only for legacy designs retaining through-hole infrastructure or where manual rework access is prioritized. |
Compared with SMBJ120CA and 1.5KE120CA, the 1.5SMC120CA-M3/9AT delivers optimal balance of 1500 W surge capacity, SMT manufacturability, and thermal performance (RθJA = 75 °C/W) - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 readiness and halogen-free compliance.
Availability
1.5SMC120CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and halogen-free RoHS compliance.
Supply support for 1.5SMC120CA-M3/9AT 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 reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 readiness are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in 1.5SMC120CA-M3/9AT?
The "CA" suffix in 1.5SMC120CA-M3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This eliminates the need for polarity orientation during PCB placement and simplifies protection design for AC-coupled or differential signal paths.
Is 1.5SMC120CA-M3/9AT qualified to AEC-Q101?
The base part number 1.5SMC120CA-M3/9AT is halogen-free and RoHS-compliant but not AEC-Q101 qualified by default. However, Vishay offers the HM3_X variant (e.g., 1.5SMC120CAHM3_A/9AT) with full AEC-Q101 qualification - same electrical specs and SMC package, validated for automotive under-hood use per stress test requirements.
What is the maximum clamping voltage of 1.5SMC120CA-M3/9AT at its rated peak pulse current?
The 1.5SMC120CA-M3/9AT has a maximum clamping voltage (VC) of 165 V when subjected to its rated peak pulse current (IPPM) of 9.1 A under the standard 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the M3 suffix affect the environmental compliance of 1.5SMC120CA-M3/9AT?
The M3 suffix in 1.5SMC120CA-M3/9AT indicates halogen-free construction and full RoHS compliance - meeting EU Directive 2011/65/EU and JEDEC JS709E requirements. Unlike E3-suffix variants, M3 devices contain no brominated flame retardants or chlorine-based compounds, supporting sustainability goals without sacrificing electrical or thermal performance.
Can 1.5SMC120CA-M3/9AT be used in place of unidirectional TVS diodes like 1.5SMC120A-M3/9AT?
No - 1.5SMC120CA-M3/9AT is strictly bidirectional and lacks cathode band marking, whereas 1.5SMC120A-M3/9AT is unidirectional with defined anode/cathode polarity. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC signals or floating references, while unidirectional parts are needed for DC-biased rails where polarity-specific clamping is required.
1.5SMC120CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC120CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC120CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CA-M3/9AT 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 1.5SMC120CA-M3/9AT reliable?
The price and inventory of 1.5SMC120CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CA-M3/9AT?
1.5SMC120CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CA-M3/9AT 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 1.5SMC120CA-M3/9AT?
For technical support, including 1.5SMC120CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC120CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CA-M3/9AT 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 1.5SMC120CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CA-M3/9AT?
All 1.5SMC120CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CA-M3/9AT, 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 1.5SMC120CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC120CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120CA-M3/9AT Tags
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Diodes Incorporated
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Diodes Incorporated
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