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Taiwan Semiconductor Corporation 1.5SMC170CA
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- Part No.:
- 1.5SMC170CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CA.pdf
- Description:
- 1500W, 170V, 5%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,600
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Product details
Overview
1.5SMC170CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 153–187 V, working stand-off voltage 138 V, clamping voltage 244 V at 6.4 A peak pulse current, and fast response time <1.0 ps. It protects power rails and signal lines in telecom infrastructure and industrial control systems against ESD, lightning surges, and load-switching transients.
For engineers reviewing the 1.5SMC170CA datasheet, 1.5SMC170CA pinout, 1.5SMC170CA application, or 1.5SMC170CA equivalent, key selection criteria include bidirectional clamping capability, 138 V working voltage compatibility with 150 V DC bus systems, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance (RθJA = 50 °C/W) for surface-mount PCB layout under sustained surge conditions.
Technical Context
The 1.5SMC170CA uses a glass-passivated silicon junction optimized for high-energy transient suppression in both polarities. Its unidirectional counterpart (1.5SMC170A) shares identical package, thermal performance (RθJC = 15 °C/W), and peak pulse power rating (1500 W), but differs in polarity marking and leakage behavior above VWM.
Designed for automated SMT placement, it meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 2 whisker resistance. The device operates across –55 °C to +150 °C junction temperature range and maintains stable clamping performance up to 150 °C ambient due to low thermal resistance and 0.108 %/°C VBR temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 153 V / 187 V - Ensures reliable conduction onset above 138 V system operating voltage while avoiding false triggering |
| VWM | 138 V - Maximum continuous reverse voltage before significant leakage; matches 150 V nominal DC bus with 8% margin |
| VC@IPPM | 244 V - Clamped voltage during 6.4 A 10/1000 µs surge; limits downstream IC stress to safe levels |
| PPK | 1500 W - Peak pulse power handling per single 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 immunity |
| IR@VWM | <1 µA - Ultra-low leakage ensures minimal power loss and no interference with high-impedance monitoring circuits |
| TJ max | +150 °C - Enables operation in enclosed industrial enclosures without forced cooling |
| RθJA | 50 °C/W - Allows thermal design with standard 2 oz copper on 1-in² pad area for 6.5 W steady-state dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; connects across protected line and ground (or between differential lines) without orientation constraint |
| Case (body) | Thermal and mechanical interface | DO-214AB body provides 0.210 g mass and 15 °C/W junction-to-case thermal path for heatsinking via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±10%) and long-term reliability under repeated surge stress without parameter drift |
| ISO 7637-2 compliance | Validated for automotive-grade transients including Pulse 1 (inductive load dump), Pulse 2a/2b (switching spikes), and Pulse 3a/3b (capacitive coupling) |
| Fast response time <1.0 ps | Clamps ESD events (IEC 61000-4-2) before sensitive logic inputs reach destructive voltage thresholds |
| J-STD-020 Level 1 MSL | Zero bake requirement prior to reflow; compatible with standard lead-free solder profiles without popcorn risk |
| Halogen-free per IEC 61249-2-21 | Meets environmental compliance for industrial and telecom equipment sold in EU, Japan, and China |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of 138 V DC input stage in variable-frequency drives against inductive kickback from contactor switching and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly across DC bus terminals before main capacitor bank. Use Value: Limits transient overvoltage to ≤244 V, preventing IGBT gate oxide damage and maintaining system uptime during frequent motor starts/stops. | Use Scenario: Surge protection on -48 V DC telecom power distribution boards feeding remote radio units (RRUs) and baseband units. IC Role / Device Role / Timing Role: Primary-level TVS on power entry point, coordinated with upstream MOVs and downstream polymer PTCs. Use Value: Withstands repeated 10/1000 µs surges up to 6.4 A while maintaining sub-µA leakage at -48 V nominal, ensuring low standby power and long service life. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Input protection for LIN bus and 12 V sensor supply lines exposed to battery load-dump pulses per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Secondary-level TVS on each protected line, placed after common-mode chokes and before signal conditioning ICs. Use Value: Clamps 100 V/10 ms load-dump transients to safe levels within 1 ps, preserving microcontroller GPIO integrity without requiring additional series impedance. | Use Scenario: Protection of 24 V digital input channels in programmable logic controllers subjected to field-wiring induced surges and ESD from operator interaction. IC Role / Device Role / Timing Role: Line-to-ground TVS on each isolated input channel, mounted adjacent to terminal block connectors. Use Value: Provides 1500 W peak power absorption with 138 V VWM, enabling direct interface to 24 V industrial sensors without voltage divider networks or level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 275 V @ 4.3 A | Lower energy handling limits use to sub-600 W surge environments; not suitable for ISO 7637-2 Pulse 1 | Select only when board space constraints prevent DO-214AB mounting and surge requirements are limited to IEC 61000-4-5 Level 2 |
| SMCJ170CA (Littelfuse) | Identical DO-214AB (SMC) package and 1500 W rating; VBR = 153–187 V same; VC = 244 V @ 6.4 A identical | Same electrical performance and mechanical fit; differs in marking code and traceability documentation | Drop-in replacement with full functional and mechanical equivalence; verify sourcing continuity for long-term production |
Compared with 1.5SMC170CA, SMBJ170CA offers smaller footprint but reduced surge capacity, while SMCJ170CA delivers identical protection performance and board-level compatibility-making it the preferred alternative for seamless second-source qualification.
Availability
1.5SMC170CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and PLC I/O cards requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC170CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The 1.5SMC series was designed specifically for high-reliability surface-mount transient suppression in harsh environments-including automotive, industrial automation, and telecom infrastructure-where robustness, consistency, and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of the 1.5SMC170CA under rated surge conditions?
The 1.5SMC170CA has a maximum clamping voltage (VC) of 244 V when subjected to its rated peak pulse current (IPPM) of 6.4 A with a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events, ensuring downstream components remain within safe operating voltage ranges.
Is the 1.5SMC170CA unidirectional or bidirectional, and how is polarity identified?
The 1.5SMC170CA is a bidirectional TVS diode, indicated by the "CA" suffix per manufacturer documentation. It has symmetrical anode/cathode terminals with no polarity marking-enabling installation without orientation concern across differential lines or line-to-ground paths. Unlike unidirectional variants (e.g., 1.5SMC170A), it conducts equally in both directions above VBR.
Does the 1.5SMC170CA meet automotive transient immunity standards?
Yes, the 1.5SMC170CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, making it suitable for automotive body electronics, infotainment power supplies, and sensor interfaces. Its 1500 W peak power rating and 244 V clamping voltage enable compliance with Pulse 1 (inductive load dump) when properly coordinated with line impedance and system grounding.
What is the thermal resistance and maximum junction temperature for the 1.5SMC170CA?
The 1.5SMC170CA has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W and a maximum junction temperature (TJ) of +150 °C. These values allow the device to dissipate up to 6.5 W continuously at 25 °C ambient, with derating per Fig.2 in the datasheet-supporting reliable operation in sealed industrial enclosures up to +85 °C ambient when mounted on adequate copper area.
How does the 1.5SMC170CA differ from the 1.5SMC170A variant?
The 1.5SMC170CA is bidirectional with symmetrical clamping in both polarities, while the 1.5SMC170A is unidirectional and features a cathode band marking. Both share identical VBR (153–187 V), VWM (138 V), VC (244 V), and package (DO-214AB), but the 1.5SMC170A exhibits forward voltage drop (~3.5–5.0 V) and higher leakage above VWM in reverse bias-making the CA version preferable for AC-coupled or floating-line protection.
1.5SMC170CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 6.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC170CA FAQ
1.How can I place an order for 1.5SMC170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CA 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 1.5SMC170CA reliable?
The price and inventory of 1.5SMC170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CA is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CA?
1.5SMC170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CA 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 1.5SMC170CA?
For technical support, including 1.5SMC170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CA requirements.
6.How does Aetrix verify that 1.5SMC170CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CA 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 1.5SMC170CA meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CA?
All 1.5SMC170CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CA, 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 1.5SMC170CA part is unused and in its original packaging.
Return procedure for 1.5SMC170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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