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Taiwan Semiconductor Corporation P4SMA170CAH
- Part No.:
- P4SMA170CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170CAH.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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Product details
Overview
P4SMA170CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 170V breakdown voltage (min 153V, max 179V), and clamping voltage of 234V at 1.8A peak impulse current under 10/1000μs waveform. It protects automotive-grade DC/DC converters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA170CAH datasheet, P4SMA170CAH pinout, P4SMA170CAH application, or P4SMA170CAH equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, <1.0ps response time, <1μA leakage above 145V working stand-off, and UL 94V-0 molded case - critical for robust overvoltage protection in space-constrained automotive and industrial power systems.
Technical Context
The P4SMA170CAH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its breakdown voltage range (153–179V) and clamping voltage (234V @ 1.8A) are specified per ANSI/IEEE C62.35 with 1.0mA test current, ensuring predictable turn-on behavior during surge events.
Designed for operation across –55°C to +150°C junction temperature, it supports high-reliability automotive applications with moisture sensitivity level 1 (J-STD-020), matte tin-plated leads compliant with J-STD-002, and whisker resistance per JESD 201 Class 2 - enabling automated placement without solderability or reliability compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 153 V / 179 V - defines guaranteed conduction onset window under 1.0 mA test current; ensures consistent surge triggering across temperature and unit variance |
| VWM | 145 V - maximum continuous reverse operating voltage; system must stay below this to avoid leakage-induced power loss or thermal stress |
| VC @ IPPM | 234 V @ 1.8 A (10/1000μs) - peak clamped voltage seen by protected circuit; determines minimum safe withstand rating of downstream components |
| PPPM | 400 W - peak pulse power handling capability; defines survivability against standardized ISO 7637-2 transient waveforms |
| IR @ VWM | <1 μA - ultra-low reverse leakage at rated stand-off; minimizes standby current drain in battery-powered or high-impedance circuits |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without derating |
| Response time | <1.0 ps - intrinsic junction speed; ensures clamping activation before transient energy couples into sensitive ICs |
Pinout & Package
DO-214AC (SMA) surface-mount package: 2-terminal, bidirectional configuration; cathode band absent (bidirectional symmetry); case meets UL 94V-0; weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | No polarity marking required; connects across protected line (e.g., CAN_H–CAN_L or supply–return) to clamp surges in both directions |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and passive heat dissipation via PCB copper; no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Enhances long-term reliability and stability of VBR and leakage performance under thermal and humidity stress |
| ISO 7637-2 compliance | Guaranteed suppression of Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly without floor-life constraints |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives; suitable for environmentally regulated automotive and industrial production |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protects 12V-to-48V bidirectional DC/DC converter inputs from load-dump transients and alternator ripple in 48V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp ±100V+ transients within 1ps, preventing MOSFET gate oxide failure and controller latch-up. Use Value: Enables compliance with ISO 16750-2 and OEM-specific surge immunity specs without adding active crowbar circuitry or derating input capacitors. | Use Scenario: Shields primary-side rectifier and controller ICs in industrial AC/DC adapters subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 400W pulses at 145V, limiting voltage seen by bridge rectifier and PWM controller during 10/1000μs line surges. Use Value: Eliminates need for bulkier MOV-based protection while maintaining >100k-cycle surge endurance and stable clamping over lifetime. |
| LED Driver Power Input | Automotive CAN Transceiver Protection |
Use Scenario: Safeguards constant-current LED drivers in streetlight and headlamp modules against ESD and switching spikes from nearby solenoid loads. IC Role / Device Role / Timing Role: Bidirectional TVS mounted at driver input to clamp both positive and negative transients induced by relay coil flyback or hot-swap events. Use Value: Prevents LED string open-circuit failure and driver IC damage while preserving low-leakage operation (<1μA) to avoid dimming drift in precision current regulation. | Use Scenario: Protects CAN FD transceivers in body control modules from ESD and battery disconnect transients on CAN_H/CAN_L differential pair. IC Role / Device Role / Timing Role: Symmetrical TVS connected between CAN_H and CAN_L to clamp common-mode surges without disrupting differential signaling integrity. Use Value: Maintains CAN bus uptime during 8kV contact ESD events and 100V ISO 7637-2 Pulse 2b transients without requiring additional common-mode chokes or layout isolation. |
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 | 600W rating, SMB package (larger footprint), VC = 274V @ 2.2A, same VBR range | Higher power margin but requires 30% more PCB area; better for repeated surge exposure in non-space-constrained designs | Select when peak pulse energy exceeds 400W limits or when thermal mass demands larger package |
| 1.5SMC170CA | 1500W rating, SMC package (5.3mm × 4.6mm), VC = 275V @ 5.4A, same VBR range | Designed for high-energy industrial surges; incompatible with fine-pitch SMA land patterns | Choose only if system-level testing confirms >400W transient threat profile and board layout allows SMC footprint |
Compared with SMBJ170CA and 1.5SMC170CA, the P4SMA170CAH delivers optimal balance of AEC-Q101 compliance, 400W surge capacity, and DO-214AC footprint - making it the preferred choice for automotive and compact industrial DC/DC converters where space, reliability, and standardized transient immunity are jointly constrained.
Availability
P4SMA170CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switch-mode power supplies, and LED driver power inputs requiring stable component supply, AEC-Q101 qualification, and ISO 7637-2 compliance.
Supply support for P4SMA170CAH 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, and power devices for automotive and industrial markets.
The P4SMA series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for robust, high-volume automotive power rail protection with emphasis on fast response, low leakage, and automated assembly compatibility.
FAQ
What is the exact breakdown voltage range for P4SMA170CAH?
The P4SMA170CAH has a guaranteed breakdown voltage range of 153 V to 179 V at 1.0 mA test current, per its electrical specifications table. This range reflects manufacturing tolerance and ensures reliable turn-on behavior across temperature and unit variation. The value is measured after 300μs square-wave pulse application, consistent with ANSI/IEEE C62.35 standards. P4SMA170CAH maintains this specification across its full operating junction temperature range of –55°C to +150°C.
Is P4SMA170CAH unidirectional or bidirectional?
P4SMA170CAH is a bidirectional TVS diode, indicated by the "CAH" suffix per Taiwan Semiconductor's ordering convention. It provides symmetrical clamping for both positive- and negative-going transients without polarity marking on the DO-214AC package. This makes P4SMA170CAH suitable for protecting differential lines like CAN or AC-coupled signals, as well as single-ended rails where reverse polarity risk exists. Electrical characteristics apply identically in both directions.
Does P4SMA170CAH meet automotive qualification standards?
Yes, P4SMA170CAH is AEC-Q101 qualified and explicitly designed for automotive applications. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements, and is rated for operation from –55°C to +150°C junction temperature. Its moisture sensitivity level is 1 (J-STD-020), and it passes JESD 201 Class 2 whisker testing - all confirmed in the official TSC datasheet for P4SMA170CAH.
What is the clamping voltage of P4SMA170CAH under surge conditions?
The maximum clamping voltage of P4SMA170CAH is 234 V at 1.8 A peak impulse current, tested with the standard 10/1000μs double-exponential waveform. This value represents the upper limit of voltage imposed on the protected circuit during a 400W transient event. The clamping performance is guaranteed across the full operating temperature range and forms the basis for downstream component voltage-withstand selection in designs using P4SMA170CAH.
Can P4SMA170CAH be used in automated SMT assembly?
Yes, P4SMA170CAH is optimized for automated placement: it features matte tin-plated leads compliant with J-STD-002 solderability standards, moisture sensitivity level 1 (no baking required), and a DO-214AC (SMA) package geometry validated for pick-and-place accuracy. Its glass-passivated junction and UL 94V-0 molding compound further ensure process robustness during reflow. These attributes are explicitly documented for P4SMA170CAH in Taiwan Semiconductor's official product release.
P4SMA170CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- 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):
- 1.8A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170CAH FAQ
1.How can I place an order for P4SMA170CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170CAH 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 P4SMA170CAH reliable?
The price and inventory of P4SMA170CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170CAH is usually 5 days.
3.What payment methods are accepted for P4SMA170CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170CAH?
P4SMA170CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170CAH 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 P4SMA170CAH?
For technical support, including P4SMA170CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170CAH requirements.
6.How does Aetrix verify that P4SMA170CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA170CAH 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 P4SMA170CAH meets industry standards.
7.What is the process for return or replacement of P4SMA170CAH?
All P4SMA170CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170CAH, 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 P4SMA170CAH part is unused and in its original packaging.
Return procedure for P4SMA170CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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