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Vishay General Semiconductor - Diodes Division P4SMA170AHE3_A/H
- Part No.:
- P4SMA170AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170AHE3_A/H.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,086
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Product details
Overview
P4SMA170AHE3_A/H 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_A/H datasheet, P4SMA170AHE3_A/H pinout, P4SMA170AHE3_A/H application, or P4SMA170AHE3_A/H equivalent, key selection criteria include clamping performance at 170 V system level, unidirectional polarity for DC rail protection, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional overvoltage clamp, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance. Its 170 V standoff rating targets high-voltage DC bus lines in automotive power modules and industrial motor drives.
The device sustains 400 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, derating above 25 °C per Fig. 2, and supports 40 A non-repetitive forward surge current (IFSM) at 8.3 ms half-sine. Junction temperature range spans −65 °C to +150 °C, with MSL Level 1 moisture sensitivity.
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 for 170 V nominal DC rails. |
| VBR (Breakdown Voltage) | 162–179 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients exceeding 170 V. |
| VC (Clamping Voltage) | 234 V at IPPM = 1.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream MOSFETs or ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability on standard 5.0 mm × 5.0 mm copper pads; sufficient for ISO 7637-2 Pulse 1/2a/5a compliance. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient; requires careful PCB copper area design to maintain TJ ≤ 150 °C under repetitive surges. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; enables use in engine control units and ADAS power supplies. |
| Package | SMA (DO-214AC) - Low-profile surface-mount outline with matte tin-plated leads; compatible with J-STD-002 solderability and JESD22-B102 whisker testing. |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; cathode indicated by band on body; terminals are matte tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration; defines polarity orientation on PCB. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 170 V rail); reverse-biased during normal operation; conducts only during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust suppression of high-energy transients like load dump (ISO 16750-2) without degradation in automotive 24 V systems. |
| Glass passivated chip junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| AEC-Q101 qualification | Validates suitability for mission-critical automotive applications including powertrain and chassis control modules. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin for sensitive gate drivers. |
Applications
| Automotive Engine Control Unit (ECU) Power Input | Industrial Motor Drive DC Bus Protection |
|---|---|
Use Scenario: Protects 170 V DC link input of automotive ECUs against load dump transients up to 35 V over nominal battery voltage. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly across input terminals to limit voltage excursion during alternator field decay. Use Value: Clamps to 234 V within nanoseconds, preventing damage to upstream DC/DC converters and microcontrollers rated for ≤250 V absolute maximum. |
Use Scenario: Shields IGBT gate driver supply rails in variable-frequency drives exposed to inductive switching noise and regeneration spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between +170 V rail and ground to absorb repetitive 10/1000 µs surges from PWM commutation. Use Value: Maintains <1 µA leakage at 145 V, avoiding unnecessary power loss while delivering 400 W pulse handling for >100,000 surge cycles. |
| Telecom Base Station Power Supply | Onboard Charger (OBC) High-Voltage Interface |
Use Scenario: Safeguards 170 V intermediate bus in telecom rectifier modules against lightning-induced surges on AC input side. IC Role / Device Role / Timing Role: Primary-level TVS mounted at AC/DC converter output to suppress common-mode transients coupled through transformer parasitics. Use Value: Achieves 234 V clamping at 1.3 A, ensuring downstream PMICs and FPGAs remain within safe operating area during IEC 61000-4-5 Level 4 tests. |
Use Scenario: Protects bidirectional DC/DC interface between 400 V battery and 170 V auxiliary supply in EV onboard chargers. IC Role / Device Role / Timing Role: Unidirectional clamp on 170 V isolated secondary side to contain flyback spikes from synchronous rectifiers. Use Value: AEC-Q101 qualification guarantees operation across −40 °C to +125 °C ambient, matching OBC thermal envelope requirements. |
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 | Same VWM (145 V), VBR (162–179 V), VC (234 V), but rated for 400 W at 25 °C only; no AEC-Q101 qualification. | Commercial-grade use only; not approved for automotive safety-critical nodes. | Select when cost sensitivity outweighs automotive qualification requirements and thermal derating is managed externally. |
| 1.5SMC170A | Higher package thermal resistance (RθJA ≈ 150 °C/W), larger SMC (DO-214AB) footprint, same electrical specs except 300 W PPPM above 91 V. | Requires larger PCB area and exhibits higher junction temperature rise under identical surge conditions. | Choose only if legacy SMC layout exists and 400 W pulse power is not required at elevated ambient temperatures. |
Compared with SMAJ170A-E3/5A and 1.5SMC170A, the P4SMA170AHE3_A/H uniquely combines AEC-Q101 qualification, SMA footprint efficiency, and full 400 W pulse rating-making it the optimal choice for space-constrained, thermally demanding automotive and industrial 170 V rail protection.
Availability
P4SMA170AHE3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive DC buses, telecom base station power supplies, and EV onboard charger interfaces requiring stable component supply with AEC-Q101 assurance and consistent 170 V clamping performance.
Supply support for P4SMA170AHE3_A/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, power handling, and automotive-grade qualification.
The P4SMA Series is engineered specifically for surface-mount transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, high pulse power, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of P4SMA170AHE3_A/H at its rated peak pulse current?
The P4SMA170AHE3_A/H has a maximum clamping voltage (VC) of 234 V at 1.3 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under specified test conditions with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, and represents the upper voltage limit imposed on protected circuitry during surge events. The P4SMA170AHE3_A/H maintains this clamping performance across its qualified operating temperature range.
Is P4SMA170AHE3_A/H suitable for automotive applications?
Yes, the P4SMA170AHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix and revision-coded "_A/H" ordering format. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability standards. The P4SMA170AHE3_A/H is deployed in engine control units, ADAS power supplies, and onboard chargers where 170 V rail protection must survive extended service life under thermal and vibration stress.
What does the "HE3" suffix indicate in P4SMA170AHE3_A/H?
The "HE3" suffix in P4SMA170AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade variants (e.g., "E3") and halogen-free automotive versions ("HM3"). Per Vishay documentation, "HE3" parts meet JESD201 Class 2 whisker resistance, J-STD-020 MSL Level 1 reflow profile (260 °C peak), and automotive-specific reliability screening. The P4SMA170AHE3_A/H uses matte tin-plated leads and UL 94 V-0 molding compound to fulfill these requirements.
How does the thermal performance of P4SMA170AHE3_A/H affect PCB layout?
The P4SMA170AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, meaning each watt of dissipated power raises junction temperature by 120 °C above ambient-unless mitigated by PCB copper area. To sustain 400 W peak pulses without exceeding TJ(max) = 150 °C, the P4SMA170AHE3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet. Insufficient copper results in premature thermal runaway during repetitive surges.
Can P4SMA170AHE3_A/H replace bidirectional TVS diodes in circuit designs?
No, the P4SMA170AHE3_A/H is strictly unidirectional and must not replace bidirectional TVS diodes (e.g., P4SMA170CA) in AC-coupled or floating signal line applications. Its cathode band marks polarity, and reverse conduction occurs only during overvoltage events on the cathode side. Using the P4SMA170AHE3_A/H in bidirectional configurations risks catastrophic failure due to forward conduction during negative transients. Always verify polarity alignment and transient directionality before substitution.
P4SMA170AHE3_A/H 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:
- -
- 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_A/H FAQ
1.How can I place an order for P4SMA170AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170AHE3_A/H 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_A/H reliable?
The price and inventory of P4SMA170AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA170AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170AHE3_A/H?
P4SMA170AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170AHE3_A/H 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_A/H?
For technical support, including P4SMA170AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA170AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA170AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA170AHE3_A/H?
All P4SMA170AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for P4SMA170AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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