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Vishay General Semiconductor - Diodes Division 1.5SMC120CAHM3/I
- Part No.:
- 1.5SMC120CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CAHM3/I.pdf
- Description:
- TVS DIODE 102VWM 165VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,307
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Product details
Overview
1.5SMC120CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 120 V standoff voltage (VWM), 137 V minimum breakdown voltage (VBR), 165 V maximum clamping voltage (VC) at 9.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC120CAHM3/I datasheet, 1.5SMC120CAHM3/I pinout, 1.5SMC120CAHM3/I application, or 1.5SMC120CAHM3/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, SMC (DO-214AB) package thermal performance, and compliance with UL 497B surge protector requirements.
Technical Context
This device operates as a voltage-clamped crowbar during transients: under reverse or forward polarity surges, it avalanches symmetrically to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at 102 V), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The 1.5SMC120CAHM3/I delivers consistent clamping performance across -65 °C to +150 °C junction temperature range, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads without heatsinking for short-duration pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 102 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 114–126 V at 1 mA - Voltage at which device enters avalanche; tight 10.5% tolerance ensures predictable turn-on behavior. |
| VC (Clamping) | 165 V at IPPM = 9.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC-level ESD/lightning immunity. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; enables protection against IEC 61000-4-5 Level 4 surges. |
| ID (Leakage) | <1.0 μA at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max. | +150 °C - Maximum junction temperature rating supports under-hood automotive and industrial environments with sustained ambient heat. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal dissipation. |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional construction has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either polarity) | Accepts surge current in both directions; connects to line being protected (e.g., CAN_H or RS-485 A). |
| Cathode | Transient current exit point (either polarity) | Completes low-impedance path to ground or return rail during clamping; symmetrical with Anode for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (10/1000 μs) without degradation when mounted on recommended 8 mm × 8 mm copper pads. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin for 3.3 V/5 V logic. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with lead-free assembly processes peaking at 260 °C. |
| Halogen-free & RoHS-compliant | Meets environmental compliance for global electronics manufacturing, including EU RoHS Directive 2011/65/EU Annex II. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, responding within <1 ns to limit voltage excursion. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends exposed to ISO 7637-2 Pulse 1/2a/5a events. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs and motor drives against ground bounce and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair (two devices) suppressing common-mode and differential-mode transients on RS-485 A/B terminals. Use Value: Maintains data integrity during 4 kV IEC 61000-4-5 surges without requiring system reset or communication recovery time. |
| Telecom Power Feeding | Consumer USB-C Port Protection |
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras, wireless APs) from induced surges on 48 V DC power pairs entering building infrastructure. IC Role / Device Role / Timing Role: Bidirectional clamping device installed across DC input rails, conducting only during overvoltage events exceeding 102 V. Use Value: Enables compliance with UL 60950-1 and IEC 62368-1 surge withstand requirements without derating power supply output. |
Use Scenario: Guarding USB-C CC and VBUS pins in portable chargers and docking stations against ESD (±15 kV contact) and hot-swap voltage spikes. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector, shunting transient energy before reaching USB controller ICs. Use Value: Achieves IEC 61000-4-2 Level 4 ESD immunity while adding <0.3 pF parasitic capacitance - negligible impact on 10 Gbps USB3.2 signaling. |
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 | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive load dump where 1500 W is required | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE120CA | Same electrical specs but DO-201AE axial package; higher mounting inductance, no SMT compatibility | Not suitable for automated assembly; requires through-hole routing and manual inspection; incompatible with high-density PCB layouts | Choose only for legacy repair or prototyping where SMT is unavailable |
Compared with SMBJ120CA and 1.5KE120CA, the 1.5SMC120CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge capacity, and SMC package thermal performance - making it the only option qualified for production automotive and industrial SMT lines requiring full IEC 61000-4-5 Level 4 immunity.
Availability
1.5SMC120CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial fieldbus interfaces, telecom power entry points, and consumer USB-C implementations requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC120CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 validation, UL recognition, and repeatable clamping performance are mandatory.
FAQ
What does the "HM3" suffix indicate in 1.5SMC120CAHM3/I?
The "HM3" suffix in 1.5SMC120CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance and LF peak reflow temperature of 260 °C - essential for automotive and industrial SMT manufacturing. The "I" indicates 13-inch tape-and-reel packaging (3500 units per reel).
Is 1.5SMC120CAHM3/I suitable for protecting CAN FD bus lines?
Yes, 1.5SMC120CAHM3/I is suitable for CAN FD bus protection due to its bidirectional clamping, 165 V clamping voltage at 9.1 A, and sub-nanosecond response time. Its low leakage (<1.0 μA) avoids signal distortion on the 2 V differential bus, and AEC-Q101 qualification validates performance across automotive temperature and vibration requirements.
How does the SMC package of 1.5SMC120CAHM3/I compare thermally to SMA or SMB packages?
The SMC (DO-214AB) package of 1.5SMC120CAHM3/I provides lower thermal resistance than SMA (DO-214AC) or SMB (DO-214AA): RθJA = 75 °C/W vs. ~100–120 °C/W for smaller packages. This allows 1.5SMC120CAHM3/I to sustain higher surge duty cycles on standard PCB copper, critical for repeated lightning-induced transients in outdoor telecom gear.
Does 1.5SMC120CAHM3/I meet UL 497B requirements for telecom surge protectors?
Yes, 1.5SMC120CAHM3/I carries Underwriters Laboratories recognition under file E136766 for both unidirectional and bidirectional configurations per UL 497B - confirming suitability for primary and secondary circuit protection in telecom power and signal interfaces, including DSL and PoE equipment.
What is the maximum allowable PCB pad size for optimal thermal performance of 1.5SMC120CAHM3/I?
For optimal thermal performance, 1.5SMC120CAHM3/I should be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2. Larger pads improve heat spreading but do not reduce RθJA below the rated 75 °C/W; oversized pads may compromise solder joint reliability during thermal cycling.
1.5SMC120CAHM3/I 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC120CAHM3/I FAQ
1.How can I place an order for 1.5SMC120CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CAHM3/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 1.5SMC120CAHM3/I reliable?
The price and inventory of 1.5SMC120CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC120CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CAHM3/I?
1.5SMC120CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CAHM3/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 1.5SMC120CAHM3/I?
For technical support, including 1.5SMC120CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC120CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CAHM3/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 1.5SMC120CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CAHM3/I?
All 1.5SMC120CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CAHM3/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 1.5SMC120CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC120CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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