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Vishay General Semiconductor - Diodes Division P4SMA170CAHE3/5A
- Part No.:
- P4SMA170CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170CAHE3/5A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
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Product details
Overview
P4SMA170CAHE3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal or power lines. It features a 170 V standoff voltage (VWM), 190 V minimum breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive applications.
For engineers reviewing the P4SMA170CAHE3/5A datasheet, P4SMA170CAHE3/5A pinout, P4SMA170CAHE3/5A application, or P4SMA170CAHE3/5A equivalent, this device is selected for robust ESD and surge protection in automotive sensor interfaces, industrial I/O lines, and telecom power rails where bidirectional clamping, low leakage (<1 µA at VWM), and MSL Level 1 solderability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with clamping voltage of 234 V at 1.3 A peak pulse current (IPPM), enabling effective suppression of ±170 V transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it delivers 400 W peak pulse power (derated to 300 W above 91 V), operates from −65 °C to +150 °C, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12–48 V systems with transient headroom. |
| VBR (Breakdown Voltage) | 190 V min - Voltage at which device enters avalanche conduction; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 234 V at IPPM = 1.3 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; supports IEC 61000-4-5 Level 3/4 surge immunity. |
| ID (Reverse Leakage) | <1 µA at 170 V - Negligible standby current draw; avoids signal distortion or battery drain in always-on circuits. |
| TJ max | +150 °C - Junction temperature limit enabling operation in under-hood automotive environments and high-ambient industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification; suitable for ASIL-B subsystems. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative surges relative to cathode reference. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive surges; no band marking for bidirectional devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| 400 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge test requirements up to 4 kV (line-to-earth) in properly designed PCB layouts with recommended 5.0 mm × 5.0 mm copper pads. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during manufacturing. |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature; reduces parameter drift vs. epoxy-passivated alternatives in high-humidity environments. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use including thermal cycling, high-temperature reverse bias, and mechanical shock; traceable lot documentation available. |
Applications
| Automotive Sensor Protection | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Limits voltage excursion to ≤234 V during 100 A load dump events, preserving 16-bit ADC accuracy and preventing latch-up in downstream op-amps. |
Use Scenario: Safeguarding 24 V DC digital input cards in PLCs against field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Primary surge suppressor on each channel's input node, mounted directly at connector entry point. Use Value: Absorbs 400 W transient energy within 1 µs response time, maintaining <1 µA leakage to avoid false triggering of optocoupler-based isolation. |
| Telecom Power Rail Clamping | RS-485 Bus Protection |
|
Use Scenario: Securing −48 V DC telecom power distribution boards against lightning-induced surges on central office equipment. IC Role / Device Role / Timing Role: Secondary-level TVS on power rail after primary MOV, providing fast, precise clamping near sensitive DC/DC converters. Use Value: Clamps to 234 V at 1.3 A, limiting stress on 60 V-rated input capacitors and enabling compliance with GR-1089-CORE Level 3 surge immunity. |
Use Scenario: Protecting full-duplex RS-485 transceivers in building automation networks from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional TVS connected between A/B differential lines and ground to suppress common-mode transients. Use Value: Symmetric clamping preserves differential signaling integrity; 234 V VC ensures transceiver remains within absolute maximum ratings during ±8 kV contact ESD (IEC 61000-4-2). |
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 | Same VWM (170 V) and bidirectional function, but SMB package (DO-214AA); 600 W PPPM rating; higher thermal resistance (RθJA = 150 °C/W). | Higher power handling but larger footprint (5.3 mm × 4.6 mm vs. 4.9 mm × 3.99 mm); less suitable for dense automotive PCBs. | Select when higher surge margin is needed and board space permits larger package; verify pad layout compatibility. |
| 1.5KE170CA | Through-hole TO-218 package; same 170 V VWM and bidirectional operation; 1500 W PPPM; higher VF and slower response than P4SMA series. | Not suitable for automated SMT lines; used in legacy power supply designs where manual assembly is acceptable. | Choose only for through-hole prototyping or repair; not recommended for new SMT designs due to assembly and thermal limitations. |
Compared with SMBJ170CA and 1.5KE170CA, the P4SMA170CAHE3/5A offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge capability-making it preferred for space-constrained, high-reliability automotive and industrial SMT applications.
Availability
P4SMA170CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power distribution, and RS-485 communication systems requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for P4SMA170CAHE3/5A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA series was developed specifically for surface-mount transient suppression in automotive, industrial, and telecom applications where low profile, high surge capability, and AEC-Q101 validation are mandatory design requirements.
FAQ
What is the clamping voltage of the P4SMA170CAHE3/5A under a 10/1000 µs surge?
The P4SMA170CAHE3/5A has a maximum clamping voltage (VC) of 234 V at 1.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA170CAHE3/5A maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).
Is the P4SMA170CAHE3/5A suitable for automotive applications?
Yes, the P4SMA170CAHE3/5A is AEC-Q101 qualified (indicated by the HE3 suffix) and explicitly rated for automotive use. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. The P4SMA170CAHE3/5A is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where reliability under harsh conditions is critical.
What does the "CA" suffix mean in P4SMA170CAHE3/5A?
The "CA" suffix denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA170A), the P4SMA170CAHE3/5A has no polarity marking and functions identically regardless of voltage polarity applied across its terminals-ideal for AC-coupled or floating signal paths.
What is the maximum reverse leakage current of the P4SMA170CAHE3/5A at its standoff voltage?
The P4SMA170CAHE3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 170 V standoff voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor outputs or battery-powered circuits. The P4SMA170CAHE3/5A maintains leakage below 5 µA even at +125 °C, per derating curves in the datasheet.
Does the P4SMA170CAHE3/5A require special PCB layout considerations?
Yes-the P4SMA170CAHE3/5A achieves its rated 400 W peak pulse power only when mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal. Smaller pads reduce thermal dissipation and lower actual surge capability. The P4SMA170CAHE3/5A also requires short, low-inductance traces to the protected node to preserve sub-nanosecond response time and prevent voltage overshoot.
P4SMA170CAHE3/5A 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:
- 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):
- 1.3A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170CAHE3/5A FAQ
1.How can I place an order for P4SMA170CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170CAHE3/5A 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 P4SMA170CAHE3/5A reliable?
The price and inventory of P4SMA170CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170CAHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA170CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170CAHE3/5A?
P4SMA170CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170CAHE3/5A 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 P4SMA170CAHE3/5A?
For technical support, including P4SMA170CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170CAHE3/5A requirements.
6.How does Aetrix verify that P4SMA170CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA170CAHE3/5A 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 P4SMA170CAHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA170CAHE3/5A?
All P4SMA170CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170CAHE3/5A, 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 P4SMA170CAHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA170CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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