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Vishay General Semiconductor - Diodes Division P4SMA170AHE3/5A
- Part No.:
- P4SMA170AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170AHE3/5A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,851
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Product details
Overview
P4SMA170AHE3/5A 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. It delivers 400 W peak pulse power and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA170AHE3/5A datasheet, P4SMA170AHE3/5A pinout, P4SMA170AHE3/5A application, or P4SMA170AHE3/5A equivalent, this device is selected for robust overvoltage protection in high-reliability DC power rails, sensor interfaces, and automotive control modules where fast response (<1 ns), low clamping ratio, and MSL Level 1 solderability are critical.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to limit transient voltages above its VBR threshold while maintaining low leakage (<1 µA at VWM = 145 V). Its glass-passivated junction ensures stable performance across -65 °C to +150 °C operating temperature range.
The device is optimized for 10/1000 µs surge waveforms per IEC 61000-4-5, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation on standard 0.2" × 0.2" copper pads without heatsinking in most automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse working voltage before clamping initiates; defines safe DC operating margin. |
| VBR (Breakdown Voltage) | 162–179 V at IT = 1 mA - Avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 234 V at IPPM = 1.3 A (10/1000 µs) - Peak voltage seen by protected circuit; determines residual stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained surge energy handling capability; validated per Fig. 1 derating curve up to TA = 25 °C. |
| ID (Reverse Leakage) | <1 µA at VWM = 145 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and thermally constrained enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping to ground. |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential side (e.g., VCC rail); defines clamping direction and polarity sensitivity. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 4 surges (4 kV) on 12 V/24 V automotive power nets without failure. |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes voltage overshoot during transients-critical for protecting 150 V-rated MOSFETs and microcontrollers. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift over 10+ years in harsh environments. |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive use including temperature cycling (-40 °C to +125 °C), HTRB, and mechanical shock. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protection of 24 V supply rail against load-dump transients (ISO 7637-2 Pulse 5a) and inductive switching spikes from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS clamp referenced to ground, activated within <1 ns to limit rail voltage to ≤234 V. Use Value: Prevents latch-up or permanent damage to MCU power pins and CAN transceivers exposed to >100 V surges. |
Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges (IEC 61000-4-4 EFT, IEC 61000-4-5 surge). IC Role / Device Role / Timing Role: Standoff-mode protector placed between field-side terminal and optocoupler input, conducting only during transients. Use Value: Maintains signal integrity by limiting input voltage to safe levels for opto-isolator LED and upstream logic. |
| Telecom Power Supply Front-End | Automotive Sensor Interface (e.g., ABS Wheel Speed) |
Use Scenario: Secondary-level surge suppression on +48 V telecom rectifier outputs feeding DC/DC converters. IC Role / Device Role / Timing Role: Fast-acting shunt device clamping overvoltage before it reaches sensitive downstream regulators. Use Value: Reduces need for oversized input capacitors and extends lifetime of buck controller ICs under repeated surge stress. |
Use Scenario: Protecting differential Hall-effect sensor signal lines (e.g., GMR-based wheel speed sensors) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though P4SMA170AHE3/5A is unidirectional, used with series resistor and local ground reference). Use Value: Preserves signal-to-noise ratio by preventing transient-induced offset shifts or false zero-crossing detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/5A (Vishay) | Same VWM/VBR/VC specs; lower PPPM (400 W vs. 400 W), identical SMA package, but not AEC-Q101 qualified. | Limited to commercial/industrial use; unsuitable for automotive OEM programs requiring AEC validation. | Select P4SMA170AHE3/5A when AEC-Q101 compliance and traceable automotive sourcing are mandatory. |
| 1.5SMC170A (ON Semiconductor) | Same 170 V rating, 400 W PPPM, DO-214AB package (slightly larger than SMA/DO-214AC); RθJA ≈ 110 °C/W. | Requires PCB pad revision due to different footprint; higher thermal mass may affect surge response consistency. | Choose P4SMA170AHE3/5A for space-constrained layouts and guaranteed MSL Level 1 compatibility. |
Compared with SMAJ170A-E3/5A and 1.5SMC170A, P4SMA170AHE3/5A uniquely combines AEC-Q101 qualification, DO-214AC footprint efficiency, and verified 234 V clamping at 1.3 A-making it the preferred choice for automotive Tier-1 BOMs where qualification status and thermal reliability are non-negotiable.
Availability
P4SMA170AHE3/5A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, telecom power front-ends, and sensor interface circuits requiring stable component supply with full AEC-Q101 documentation and lot traceability.
Supply support for P4SMA170AHE3/5A 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 automotive-grade validation.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom systems-designed specifically to meet ISO 7637-2, IEC 61000-4-5, and AEC-Q101 requirements with standardized SMA packaging.
FAQ
What is the clamping voltage of P4SMA170AHE3/5A at its rated peak pulse current?
The clamping voltage (VC) of P4SMA170AHE3/5A is 234 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 1.3 A. This value is measured under standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the maximum voltage imposed on the protected circuit during a surge event. The P4SMA170AHE3/5A maintains this clamping performance consistently across its qualified temperature range.
Is P4SMA170AHE3/5A suitable for automotive applications?
Yes, P4SMA170AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock. Its 150 °C maximum junction temperature and MSL Level 1 rating make P4SMA170AHE3/5A appropriate for under-hood and body-control module deployments.
What does the "/5A" suffix indicate in P4SMA170AHE3/5A?
Within the P4SMA170AHE3/5A ordering code, the "/5A" denotes the packaging configuration: 13-inch diameter plastic tape and reel containing 7500 units. This format supports high-volume automated SMT placement and is distinct from the "/61" variant (7-inch reel, 1800 units). The "HE3" portion confirms RoHS-compliant, AEC-Q101 qualified construction.
How does P4SMA170AHE3/5A differ from bidirectional TVS diodes like P4SMA170CA?
P4SMA170AHE3/5A is unidirectional and features a cathode band for polarity-sensitive placement, clamping only in reverse bias. In contrast, P4SMA170CA is bidirectional with symmetrical breakdown in both directions and no polarity marking. The unidirectional P4SMA170AHE3/5A offers lower leakage and tighter VBR tolerance, making it optimal for DC rail protection where polarity is fixed.
What is the thermal resistance of P4SMA170AHE3/5A, and how does it affect PCB layout?
P4SMA170AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values assume mounting on minimum recommended 0.2" × 0.2" copper pads per terminal. To maintain reliability under repetitive surges, designers must adhere to this pad layout-reducing copper area increases thermal impedance and risks exceeding TJ max. = 150 °C during sustained events.
P4SMA170AHE3/5A 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170AHE3/5A FAQ
1.How can I place an order for P4SMA170AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170AHE3/5A 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 P4SMA170AHE3/5A reliable?
The price and inventory of P4SMA170AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170AHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA170AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170AHE3/5A?
P4SMA170AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170AHE3/5A 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 P4SMA170AHE3/5A?
For technical support, including P4SMA170AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170AHE3/5A requirements.
6.How does Aetrix verify that P4SMA170AHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA170AHE3/5A 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 P4SMA170AHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA170AHE3/5A?
All P4SMA170AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170AHE3/5A, 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 P4SMA170AHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA170AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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