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Vishay General Semiconductor - Diodes Division 1.5SMC170CAHM3/I
- Part No.:
- 1.5SMC170CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CAHM3/I.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,757
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Product details
Overview
1.5SMC170CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy ESD and surge protection in power and signal lines. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 234 V maximum under 6.4 A peak pulse current, and features a 171 V minimum breakdown voltage at 1 mA test current. It is used to protect automotive sensor interfaces, industrial I/O ports, and telecom line cards against lightning-induced transients.
For engineers reviewing the 1.5SMC170CAHM3/I datasheet, 1.5SMC170CAHM3/I pinout, 1.5SMC170CAHM3/I application, or 1.5SMC170CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B recognition.
Technical Context
This device operates as a voltage-clamped shunt protector: when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold (VBR = 162–179 V), it transitions from high-impedance to low-impedance state within <1 ps, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive transient stress.
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C), uses matte tin-plated leads, and is halogen-free and RoHS-compliant. The HM3 suffix confirms AEC-Q101 qualification and halogen-free construction - critical for automotive-grade deployment in engine control units and ADAS sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single high-energy surges typical of ISO 7637-2 Pulse 5a/b or IEC 61000-4-5 Level 4 without failure |
| Breakdown Voltage VBR (min/max) | 162 V / 179 V at 1 mA - defines precise clamping onset window for predictable overvoltage response |
| Stand-off Voltage VWM | 145 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets safe margin below system rail |
| Maximum Clamping Voltage VC | 234 V at 6.4 A IPPM - actual voltage seen by protected IC during worst-case surge; enables robust 24 V/48 V system design |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial environments without derating |
| Thermal Resistance RθJA | 75 °C/W - determines required PCB copper area (0.31″ × 0.31″ pads per terminal) for thermal management |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no marking required |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN bus, RS-485) without polarity concerns |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4 kV/2 Ω) and ISO 7637-2 Pulse 5a (75 V/12 Ω) without degradation |
| Halogen-free & RoHS-compliant (HM3) | Satisfies automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and industrial surge protection assemblies requiring third-party safety certification |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and temperature/pressure sensor signal lines from load dump and inductive switching transients in engine bays. IC Role / Device Role / Timing Role: Shunt TVS diode providing sub-nanosecond clamping to limit voltage excursion below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to automotive-grade microcontrollers and analog front-ends during 12 V/24 V system transients. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals to absorb ±1 kV EFT bursts and 4 kV lightning surges. Use Value: Maintains signal integrity and avoids false triggering or ADC saturation during industrial EMC testing (IEC 61000-4-4/4-5). |
| Telecom Line Card Protection | DC Power Rail Surge Suppression |
Use Scenario: Secondary protection stage on POTS or xDSL line interface cards, downstream of gas discharge tubes or primary MOVs. IC Role / Device Role / Timing Role: Fast-response secondary clamp limiting residual surge voltage to levels safe for SLIC and codec ICs. Use Value: Reduces required holdover time for upstream protectors and extends service life of sensitive telecom silicon. |
Use Scenario: Parallel-mounted across 24 V or 48 V DC distribution rails in network switches and base station power supplies. IC Role / Device Role / Timing Role: High-power bidirectional TVS absorbing repetitive surges from motor drives, relay coils, and hot-swap events. Use Value: Eliminates need for separate unidirectional devices per rail polarity; simplifies BOM and layout for dual-rail systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Lower peak pulse power (600 W), same VBR range (162–179 V), SMB package (smaller footprint, higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients in space-constrained consumer designs | Select when board area is critical and surge energy does not exceed 600 W; verify thermal performance with reduced pad area |
| 1.5KE170CA | Same 1500 W rating and VBR, but axial DO-201AE package - incompatible with SMT assembly and automotive vibration requirements | Restricted to through-hole prototyping or legacy industrial equipment; lacks AEC-Q101 qualification and MSL Level 1 rating | Choose only for manual assembly or non-automotive repair scenarios; not recommended for new automotive or high-reliability production |
Compared with SMBJ170CA and 1.5KE170CA, the 1.5SMC170CAHM3/I uniquely combines AEC-Q101 qualification, SMC surface-mount compatibility, 1500 W surge handling, and bidirectional symmetry - making it the sole option qualified for volume automotive electronics production where reliability, manufacturability, and regulatory compliance are mandatory.
Availability
1.5SMC170CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC170CAHM3/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 high-reliability, automotive-qualified, and industry-standard solutions.
The 1.5SMC Series was developed specifically for robust, high-power transient suppression in automotive, industrial, and telecom infrastructure - prioritizing AEC-Q101 compliance, UL recognition, and SMT manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC170CAHM3/I under maximum rated surge current?
The 1.5SMC170CAHM3/I has a maximum clamping voltage (VC) of 234 V when subjected to its peak pulse current (IPPM) of 6.4 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C on specified 0.31″ × 0.31″ copper pads and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is the 1.5SMC170CAHM3/I suitable for automotive applications?
Yes, the 1.5SMC170CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix, confirming halogen-free, RoHS-compliant construction and validation across temperature cycling, high-temperature operating life, and ESD stress tests required for automotive electronics. It is widely deployed in engine control units, ADAS camera modules, and body control modules.
What does the "CA" suffix indicate in 1.5SMC170CAHM3/I?
The "CA" suffix in 1.5SMC170CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both polarities without requiring orientation during placement. This distinguishes it from unidirectional variants (e.g., 1.5SMC170AHM3/I) and enables use on AC-coupled or floating signal paths like CAN, RS-485, or Ethernet PHY interfaces.
What is the standoff voltage (VWM) of the 1.5SMC170CAHM3/I?
The standoff voltage (VWM) of the 1.5SMC170CAHM3/I is 145 V - the maximum DC or continuous reverse operating voltage that can be applied without exceeding 1 μA leakage current. This parameter establishes the safe operating margin below the device's 162 V minimum breakdown voltage and must be selected ≥10–20 % above the system's normal operating voltage.
Does the 1.5SMC170CAHM3/I require special PCB layout considerations?
Yes, the 1.5SMC170CAHM3/I requires minimum 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal to achieve its rated 1500 W peak pulse power and maintain thermal resistance (RθJA = 75 °C/W). Narrow traces or insufficient copper will cause localized heating, premature failure, and degraded clamping performance during surge events.
1.5SMC170CAHM3/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):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
1.5SMC170CAHM3/I FAQ
1.How can I place an order for 1.5SMC170CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CAHM3/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 1.5SMC170CAHM3/I reliable?
The price and inventory of 1.5SMC170CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CAHM3/I?
1.5SMC170CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CAHM3/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 1.5SMC170CAHM3/I?
For technical support, including 1.5SMC170CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC170CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CAHM3/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 1.5SMC170CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CAHM3/I?
All 1.5SMC170CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CAHM3/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 1.5SMC170CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC170CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170CAHM3/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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