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Vishay General Semiconductor - Diodes Division P4SMA170AHM3_A/I
- Part No.:
- P4SMA170AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170AHM3_A/I.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,068
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Product details
Overview
P4SMA170AHM3_A/I 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), 189 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It provides clamping voltage of 234 V at 1.3 A peak pulse current and is AEC-Q101 qualified for automotive applications including sensor line protection and MOSFET gate safeguarding.
For engineers reviewing the P4SMA170AHM3_A/I datasheet, P4SMA170AHM3_A/I pinout, P4SMA170AHM3_A/I application, or P4SMA170AHM3_A/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct alternatives with documented differences in voltage rating and qualification status.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages induced by inductive switching or ESD events. Its low incremental surge resistance ensures stable clamping during repetitive 10/1000 µs pulses at 0.01% duty cycle.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads per terminal, it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance and supports operation from −65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 162–179 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction begins; tight 10.5% tolerance enables precise system-level protection design. |
| VC (Clamping Voltage) | 234 V at IPPM = 1.3 A - Measured peak voltage across device during 10/1000 µs surge; directly determines maximum stress imposed on protected IC or MOSFET. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; derates to 300 W above 91 V per datasheet note. |
| ID (Reverse Leakage) | 1.0 µA at VWM - Ultra-low leakage ensures minimal standby power loss and signal integrity in high-impedance sensor or communication lines. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and industrial enclosures without forced cooling. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing and layout for thermal management compliance. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration; must be routed with low-inductance path for effective surge shunting. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., CAN_H, sensor output); polarity must match circuit topology to avoid unintended conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in ADAS sensors and body control modules without additional qualification effort. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-203 requirements; eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) when properly mounted on 5.0 mm × 5.0 mm copper pads-reduces need for external series impedance. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during transients; critical for protecting 170 V-rated components such as high-voltage gate drivers and battery monitoring ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C); eliminates baking requirement and simplifies SMT line integration. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before they reach sensitive front-end circuitry. Use Value: Prevents ADC saturation and latch-up during 12 V system load dump events (ISO 7637-2 Pulse 5a), preserving signal fidelity and enabling fail-safe diagnostics. |
Use Scenario: Safeguarding high-side and low-side gate drive signals in 3-phase inverters used in HVAC compressors and servo drives. IC Role / Device Role / Timing Role: Clamping gate-source voltage spikes caused by Miller effect and parasitic inductance during fast IGBT/MOSFET switching transitions. Use Value: Limits VGS excursion to ≤234 V, preventing gate oxide breakdown in 600 V-class power devices and reducing false triggering in isolated gate drivers. |
| Telecom Line Interface Protection | Consumer Power Supply Input Stage |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor cabling in security cameras and access points. IC Role / Device Role / Timing Role: Primary surge suppression element on differential data lines, coordinated with common-mode chokes and secondary TVS arrays. Use Value: Withstands repeated 10/1000 µs surges up to 400 W without degradation, meeting IEC 61000-4-5 Ed.3 requirements for Class B equipment. |
Use Scenario: Input-stage transient suppression in AC-DC adapters and USB-C PD chargers handling universal input (90–264 VAC). IC Role / Device Role / Timing Role: Secondary clamping device downstream of MOV-based primary protection, absorbing residual energy after MOV clamping tail. Use Value: Provides precise 145 V standoff and 234 V clamping to protect bridge rectifier and bulk capacitor from overvoltage stress during brownout recovery and line switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3_A/I | Same VWM (145 V), identical SMA package, but rated for 400 W only up to 170 V; lacks AEC-Q101 qualification and halogen-free certification. | Approved for commercial/industrial use only; not permitted in automotive OEM designs requiring PPAP documentation. | Select when cost sensitivity outweighs automotive qualification needs and halogen-free compliance is not mandated. |
| 1.5SMC170AHE3_A/I | Higher package thermal mass (SMC/DO-214AB), 1500 W peak power rating, same VWM/VBR range; larger footprint (7.11 mm × 6.22 mm vs. 4.50 mm × 2.79 mm). | Used where higher single-pulse energy absorption is required (e.g., DC bus protection), but incompatible with space-constrained layouts designed for SMA. | Choose when board area allows larger package and system-level surge tests exceed 400 W single-event limits. |
Compared with P4SMA170AHM3_A/I, SMAJ170AHE3_A/I offers identical electrical protection but lacks automotive qualification and halogen-free compliance, while 1.5SMC170AHE3_A/I trades compact size for higher surge capacity and requires PCB redesign due to larger footprint and different thermal pad layout.
Availability
P4SMA170AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive gate circuits, telecom line protection, and consumer power supply input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for P4SMA170AHM3_A/I 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, thermal performance, and automotive-grade validation.
The P4SMA Series targets cost-sensitive, high-volume transient suppression applications where compact size, AEC-Q101 compliance, and consistent clamping performance across temperature are essential-especially in automotive body electronics and industrial control systems.
FAQ
What is the maximum clamping voltage of P4SMA170AHM3_A/I under a 10/1000 µs surge?
The P4SMA170AHM3_A/I has a maximum clamping voltage (VC) of 234 V when subjected to its rated peak pulse current of 1.3 A under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per terminal, and remains valid across the full operating temperature range with appropriate thermal derating applied per Figure 2 in the datasheet.
Is P4SMA170AHM3_A/I suitable for bidirectional signal line protection?
No, P4SMA170AHM3_A/I is a unidirectional TVS diode, as indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the P4SMA170CA variant. Using P4SMA170AHM3_A/I on AC-coupled or differential lines without proper polarity alignment risks forward conduction and permanent damage during normal signal swing.
Does P4SMA170AHM3_A/I meet automotive qualification standards?
Yes, P4SMA170AHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix and documentation in Vishay's P4SMA series datasheet (Document Number: 88367, Revision: 09-Jan-2024). This qualification covers stress tests including HTGB, HTRB, TCT, and ESD, making it suitable for automotive applications such as engine control, ADAS sensors, and body electronics.
What is the thermal resistance junction-to-ambient for P4SMA170AHM3_A/I?
The typical thermal resistance junction-to-ambient (RθJA) for P4SMA170AHM3_A/I is 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and is used to calculate allowable power dissipation at elevated ambient temperatures using the derating curve in Figure 2 of the datasheet.
How does the HM3 suffix differ from the HE3 suffix in P4SMA170AHM3_A/I?
The HM3 suffix denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction, whereas HE3 indicates RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both meet JESD 201 Class 2 whisker resistance and MSL Level 1, but HM3 complies with additional environmental mandates such as JEDEC J-STD-203 and IEC 61249-2-21 for bromine/chlorine content.
P4SMA170AHM3_A/I 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:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170AHM3_A/I FAQ
1.How can I place an order for P4SMA170AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170AHM3_A/I 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 P4SMA170AHM3_A/I reliable?
The price and inventory of P4SMA170AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA170AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170AHM3_A/I?
P4SMA170AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170AHM3_A/I 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 P4SMA170AHM3_A/I?
For technical support, including P4SMA170AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA170AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA170AHM3_A/I 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 P4SMA170AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA170AHM3_A/I?
All P4SMA170AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170AHM3_A/I, 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 P4SMA170AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA170AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA170AHM3_A/I Tags
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