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Taiwan Semiconductor Corporation P4SMA170A
- Part No.:
- P4SMA170A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
P4SMA170A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 145 V working stand-off voltage (VWM), 162–179 V breakdown voltage (VBR) at 1 mA, 234 V maximum clamping voltage (VC) at 1.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the P4SMA170A datasheet, P4SMA170A pinout, P4SMA170A application, or P4SMA170A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature range (–55°C to +150°C), moisture sensitivity level (J-STD-020 Level 1), and compatibility with automated SMT placement on high-reliability DC/DC converter and lighting control boards.
Technical Context
The P4SMA170A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse-biased clamping. Its fast response time (<1.0 ps) enables suppression of sub-nanosecond transients, while its 1.0 mA test current and 145 V VWM ensure reliable hold-off during normal operation without leakage-induced system drift.
Designed for single-die configuration in DO-214AC, the device supports bidirectional variants via "C" or "CA" suffixes but P4SMA170A itself is strictly unidirectional-cathode band marked-making it suitable for polarity-sensitive DC bus protection where forward conduction must be blocked until clamping threshold is exceeded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 145 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset |
| VBR min/max | 162–179 V @ 1 mA - Breakdown voltage tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 234 V @ 1.8 A (10/1000 µs) - Clamping voltage limits downstream IC stress during automotive load dump or inductive switching events |
| PPPM | 400 W - Peak pulse power handling capability per single non-repetitive surge per JEDEC JESD22-A114 |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves efficiency in high-impedance sensing or battery-backed circuits |
| TJ max | +150 °C - Enables use in under-hood automotive modules and enclosed LED drivers without thermal derating penalties |
| Package | DO-214AC (SMA) - Standardized SMT footprint compatible with IPC-7351B land patterns and reflow profiles |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return during clamping | Connected to system ground or low-side reference; carries full surge current during transient event |
| Cathode | Protected line input / high-side connection point | Connected to DC rail (e.g., 13.5–16 V automotive, 48 V telecom); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and IR across thermal cycling and humidity exposure per J-STD-020 Level 1 |
| Clamping response <1.0 ps | Suppresses ESD and fast-edge transients before sensitive logic or analog circuitry responds |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery jump-start), and Pulse 3a/3b (switching noise) in automotive ECUs |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life processing |
| Automated placement ready | DO-214AC geometry and lead coplanarity support high-yield pick-and-place at >25,000 UPH |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails against load dump pulses up to 120 V during alternator regulation failure. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply and ground, clamping within 234 V to prevent damage to 3.3 V or 5 V LDOs and MCU VDD pins. Use Value: Maintains system uptime by limiting voltage excursion below 234 V during 400 W, 10/1000 µs surges-well below 250 V absolute maximum ratings of common PMICs. | Use Scenario: Shields isolated flyback controller ICs and optocoupler inputs from reflected switching spikes in 24–48 V industrial power supplies. IC Role / Device Role / Timing Role: Mounted directly at DC input connector, acting as first-line defense before bulk capacitance and primary-side MOSFET gate drivers. Use Value: 145 V VWM provides 20% margin above nominal 48 V rail, while 1.0 µA IR avoids loading feedback networks in precision voltage regulation loops. |
| LED Streetlight Driver Input Protection | Telecom Power Shelf Surge Interface |
Use Scenario: Absorbs lightning-induced surges coupled into outdoor AC/DC LED driver inputs exposed to utility grid transients. IC Role / Device Role / Timing Role: Paired with MOVs and gas discharge tubes in coordinated protection scheme; handles fast-rising edge components due to sub-ns response. Use Value: 400 W PPPM rating sustains multiple 10/1000 µs surges without degradation-critical for field-deployed luminaires with 10+ year service life. | Use Scenario: Guards -48 V DC distribution bus in central office equipment against induced surges from nearby AC mains or grounding faults. IC Role / Device Role / Timing Role: Installed at power entry board, oriented anode-to-ground to clamp negative-going transients on telecom DC bus. Use Value: Cathode-band polarity marking ensures correct orientation during manual repair or automated assembly, eliminating risk of reverse-bias failure in dual-polarity 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 |
|---|---|---|---|
| SMBJ170A (Bourns) | Same VWM (145 V), identical DO-214AA package but larger footprint; 600 W PPPM rating | Higher power handling suits higher-energy surge environments (e.g., outdoor telecom cabinets), but requires PCB layout change | Select SMBJ170A only if system-level testing confirms need for >400 W clamping energy and board space allows DO-214AA pad expansion |
| 1.5SMC170A (ON Semiconductor) | Same electrical specs (VWM=145 V, VC=234 V), but DO-214AB (SMC) package with 2.54 mm lead pitch | Through-hole compatible variant; not SMT drop-in-requires redesign for wave solder or hand-soldered prototyping | Choose 1.5SMC170A for legacy through-hole designs or when DO-214AC placement yield is insufficient in high-volume SMT lines |
Compared with P4SMA170A, SMBJ170A offers higher surge capacity but demands larger PCB area, while 1.5SMC170A retains identical clamping behavior but abandons SMT compatibility-making P4SMA170A the optimal balance of miniaturization, manufacturability, and standardized 400 W protection for modern DC power interfaces.
Availability
P4SMA170A is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, and outdoor LED lighting systems requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA170A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs with global distribution and AEC-Q101 qualified product lines.
The P4SMA series targets cost-sensitive, high-volume transient protection applications in automotive, industrial, and consumer power systems-designed for robustness under ISO 7637-2 and JEDEC reliability standards without premium packaging premiums.
FAQ
What is the maximum clamping voltage of the P4SMA170A under standard 10/1000 µs surge conditions?
The P4SMA170A has a maximum clamping voltage (VC) of 234 V when subjected to a 1.8 A peak impulse current with a 10/1000 µs waveform. This value is measured per JEDEC JESD22-A114 and ensures downstream components see no more than 234 V during transient events-critical for protecting 200 V-rated capacitors and 250 V-rated ICs in 48 V and 12 V systems. The P4SMA170A achieves this while maintaining tight VBR tolerance (162–179 V).
Is the P4SMA170A suitable for bidirectional transient protection?
No, the P4SMA170A is a unidirectional TVS diode intended for DC rail protection with defined polarity. Its cathode band marking indicates anode-to-ground orientation. For bidirectional applications such as AC line or data bus protection, TSC offers the P4SMA170CA variant. Using P4SMA170A in reverse-biased configurations risks premature conduction or failure-always verify polarity alignment before placing P4SMA170A in circuit.
What is the operating junction temperature range specified for the P4SMA170A?
The P4SMA170A is rated for an operating junction temperature range of –55°C to +150°C, matching automotive under-hood and industrial enclosure requirements. This specification is validated per JEDEC JESD22-A103 and enables uninterrupted operation in environments where ambient temperatures exceed 105°C-provided PCB copper area and airflow meet TSC's thermal derating curve (Figure 2). The P4SMA170A maintains stable VBR and IR across this full range.
Does the P4SMA170A comply with RoHS and halogen-free standards?
Yes, the P4SMA170A is fully RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads satisfy J-STD-002 solderability requirements. These certifications are documented in TSC's material declarations and apply to all units shipped under ordering code P4SMA170A-no exceptions or date-code dependencies affect compliance status of the P4SMA170A.
What is the moisture sensitivity level (MSL) rating for the P4SMA170A?
The P4SMA170A has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without dry-pack requirements or floor-life limitations. This eliminates bake-out steps prior to reflow, simplifying SMT line integration and reducing process risk-especially valuable for high-mix, low-volume production of P4SMA170A-based power modules and lighting controllers.
P4SMA170A 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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170A FAQ
1.How can I place an order for P4SMA170A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170A 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 P4SMA170A reliable?
The price and inventory of P4SMA170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170A is usually 5 days.
3.What payment methods are accepted for P4SMA170A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170A?
P4SMA170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170A 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 P4SMA170A?
For technical support, including P4SMA170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170A requirements.
6.How does Aetrix verify that P4SMA170A is sourced from the original manufacturer or authorized distributors?
All P4SMA170A 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 P4SMA170A meets industry standards.
7.What is the process for return or replacement of P4SMA170A?
All P4SMA170A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170A, 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 P4SMA170A part is unused and in its original packaging.
Return procedure for P4SMA170A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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