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Vishay General Semiconductor - Diodes Division P4SMA170A-E3/5A
- Part No.:
- P4SMA170A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170A-E3/5A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA170A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, rated for 170 V standoff voltage (VWM), 162–179 V breakdown voltage (VBR) at 1 mA, and 234 V clamping voltage (VC) under 1.3 A peak pulse current (IPPM) with 10/1000 µs waveform - designed to protect power rails and signal lines in industrial motor drives against inductive switching transients.
For engineers reviewing the P4SMA170A-E3/5A datasheet, P4SMA170A-E3/5A pinout, P4SMA170A-E3/5A application, or P4SMA170A-E3/5A equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and 400 W peak pulse power capability per JEDEC JESD22-B102 solderability standard.
Technical Context
The P4SMA170A-E3/5A operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to clamp transient overvoltages before downstream components are damaged. Its 170 V stand-off voltage ensures compatibility with 150 V DC bus systems while maintaining sufficient margin above normal operating voltage.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads, it supports repetitive surge duty cycles up to 0.01 % and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature. The cathode band marking enables automated optical inspection and correct orientation during pick-and-place placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; sets upper limit for protected circuit's nominal DC rail. |
| VBR (Breakdown Voltage) | 162–179 V at IT = 1 mA - Confirmed avalanche onset range; defines minimum overvoltage threshold triggering clamping action. |
| VC (Clamping Voltage) | 234 V at IPPM = 1.3 A (10/1000 µs) - Peak voltage seen by protected load during worst-case transient; must stay below IC's absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capacity under standardized 10/1000 µs surge; derates to 300 W above 91 V per datasheet note. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area and airflow for thermal management at 3.3 W steady-state dissipation. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against accidental reverse-bias misapplication or fault conditions. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-temperature industrial enclosures when properly heatsinked. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD22-B102. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge events (e.g., reverse polarity faults). |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates avalanche breakdown when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection of 150 V DC bus systems against IEC 61000-4-5 Level 4 surges without external series impedance. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure per AEC-Q101 requirements. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking, reducing manufacturing overhead. |
| RoHS-compliant, halogen-free option available | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and IPC-1752A material declaration standards. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil de-energization), improving protection margin for sensitive gate drivers. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate driver ICs and auxiliary power rails against voltage spikes generated by contactor switching and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS placed across +15 V gate supply and ground to clamp positive transients exceeding 170 V. Use Value: Limits clamped voltage to 234 V, preserving gate oxide integrity of 20 V-rated drivers while surviving 400 W surge pulses. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between -48 V rail and chassis ground to absorb common-mode transients. Use Value: Withstands 1.3 A peak pulse at 234 V clamping, preventing latch-up in downstream DC/DC controllers rated to -60 V absolute max. |
| Automotive Body Control Modules | Industrial PLC I/O Modules |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS installed on 12 V supply input to BCU, cathode tied to +12 V, anode to ground. Use Value: Clamps 12 V rail to ≤234 V during 100 ms load dump event, ensuring MCU reset circuit remains functional below 250 V threshold. |
Use Scenario: Signal line protection for analog 4–20 mA current loop inputs subjected to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS placed across loop terminals (supply and return) to divert transients before reaching precision op-amp front-end. Use Value: 1 µA max leakage at 145 V VWM avoids loading error in µA-level current measurement circuits. |
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 | Same VWM (145 V), higher PPPM (600 W), larger SMB (DO-214AA) package (4.58 mm × 3.94 mm vs. SMA's 4.50 mm × 2.79 mm). | Requires larger PCB footprint; better suited for higher-energy surges where space permits. | Select SMBJ170A when system-level surge testing exceeds IEC 61000-4-5 Level 4 and thermal mass allows larger package. |
| 1.5SMC170A | Same VWM and VC, but higher RθJA (100 °C/W), TO-277 flat lead package, and 1500 W PPPM rating. | Non-standard SMT footprint; requires custom stencil and placement tooling; used in legacy industrial designs. | Choose 1.5SMC170A only if replacing existing TO-277 footprints or requiring >1 kW surge handling with manual heatsinking. |
Compared with P4SMA170A-E3/5A, SMBJ170A offers 50 % higher surge power in a slightly larger package ideal for new designs prioritizing robustness, while 1.5SMC170A trades modern manufacturability for extreme energy handling in retrofit scenarios - neither is pin-compatible, and both require layout revision.
Availability
P4SMA170A-E3/5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and PLC I/O modules requiring stable component supply with full traceability and no obsolescence risk through 2028.
Supply support for P4SMA170A-E3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The P4SMA Series targets cost-sensitive, high-volume industrial and automotive applications requiring standardized, RoHS-compliant TVS protection with validated surge performance and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of the P4SMA170A-E3/5A under a 10/1000 µs surge?
The P4SMA170A-E3/5A has a maximum clamping voltage (VC) of 234 V when subjected to a 1.3 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the highest voltage the protected circuit will experience during such a transient. Engineers must verify that this clamping level remains below the absolute maximum voltage rating of downstream components like gate drivers or microcontrollers. The P4SMA170A-E3/5A achieves this with low incremental surge resistance and fast avalanche response.
Is the P4SMA170A-E3/5A RoHS-compliant and halogen-free?
Yes, the P4SMA170A-E3/5A carries the "E3" suffix, indicating full compliance with the EU RoHS Directive 2011/65/EU and use of halogen-free molding compound per IPC-1752A standards. It features matte tin-plated leads qualified to J-STD-002 and JESD22-B102, and meets JESD201 Class 2 whisker resistance. The P4SMA170A-E3/5A is not halogen-free by default - that variant uses the "M3" suffix (e.g., P4SMA170A-M3/5A). Always confirm suffix code when ordering for environmental compliance programs.
What does the "-E3/5A" suffix mean in P4SMA170A-E3/5A?
The "-E3/5A" suffix in P4SMA170A-E3/5A specifies two attributes: "E3" denotes RoHS-compliant, commercial-grade construction with matte tin leads, and "/5A" indicates packaging in a 13-inch diameter plastic tape-and-reel format containing 7500 units per reel. This differs from "/61", which denotes 7-inch reels with 1800 units. The P4SMA170A-E3/5A is optimized for high-volume SMT production lines requiring large reel quantities and automated feeder compatibility.
Can the P4SMA170A-E3/5A be used in automotive applications?
The base P4SMA170A-E3/5A is commercial-grade and not AEC-Q101 qualified. However, Vishay offers AEC-Q101 variants under different ordering codes: P4SMA170AHE3_A (7″ reel) or P4SMA170AHM3_A (13″ reel), where "HE3" or "HM3" denotes automotive qualification. The P4SMA170A-E3/5A itself lacks the extended temperature validation, lifetime testing, and failure analysis required for automotive under-hood use. For automotive BCU or ADAS modules, specify the HE3/HM3 suffix versions instead of P4SMA170A-E3/5A.
How does the thermal resistance of the P4SMA170A-E3/5A affect PCB layout?
The P4SMA170A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, meaning each watt of steady-state power raises junction temperature by 120 °C above ambient. To maintain TJ ≤ 150 °C at its 3.3 W PD rating, the PCB must provide ≥5.0 mm × 5.0 mm copper pads per terminal as specified in the datasheet. Reducing pad size increases RθJA, risking thermal runaway during sustained overvoltage events. The P4SMA170A-E3/5A layout must follow Vishay's recommended mounting pad dimensions to ensure reliable operation.
P4SMA170A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- 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):
- 1.3A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170A-E3/5A FAQ
1.How can I place an order for P4SMA170A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA170A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA170A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170A-E3/5A?
P4SMA170A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170A-E3/5A 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-E3/5A?
For technical support, including P4SMA170A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170A-E3/5A requirements.
6.How does Aetrix verify that P4SMA170A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA170A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA170A-E3/5A?
All P4SMA170A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA170A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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