My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA170AHM3/H
- Part No.:
- P4SMA170AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170AHM3/H.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA170AHM3/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), 189 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It provides clamping protection for sensitive ICs, MOSFETs, and sensor signal lines in industrial and automotive electronics against inductive switching transients and lightning surges.
For engineers reviewing the P4SMA170AHM3/H datasheet, P4SMA170AHM3/H pinout, P4SMA170AHM3/H application, or P4SMA170AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), 234 V maximum clamping voltage at 1.3 A IPPM, and thermal resistance of 120 °C/W junction-to-ambient - critical for board-level surge resilience in constrained layouts.
Technical Context
This device operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds VBR (162–179 V), with fast response time (<1 ns) and low incremental surge resistance to limit transient energy delivered to downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surge stress.
The P4SMA170AHM3/H is rated for 400 W peak pulse power (10/1000 µs waveform) up to TA = 25 °C, derating linearly above that temperature per Figure 2; it supports 1.3 A peak pulse current (IPPM) and maintains clamping below 234 V while delivering 3.3 W steady-state power dissipation on infinite heatsink at 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 145 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 162–179 V at 1 mA test current - Ensures predictable, repeatable avalanche initiation for precise transient clamping. |
| VC (Clamping Voltage) | 234 V at 1.3 A IPPM - Limits voltage seen by protected circuit during worst-case 10/1000 µs surge event. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Sustains high-energy transients without failure; derates to 300 W above 91 V per spec note. |
| IR (Reverse Leakage) | 1.0 µA at 145 V - Minimal standby current avoids loading of high-impedance signal paths or battery-powered circuits. |
| TJ max | 150 °C - Enables operation in under-hood automotive and industrial environments with elevated ambient temperatures. |
| Package | SMA (DO-214AC) - Surface-mount footprint compatible with automated assembly; 5.0 mm × 5.0 mm copper pad layout required for rated power handling. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage to shunt surge current to ground. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-203 requirements; eliminates brominated flame retardants for safer end-of-life processing. |
| 400 W peak pulse rating (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events when properly laid out with 5.0 mm × 5.0 mm copper pads per terminal. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during clamping - critical for protecting 150 V-rated MOSFETs and 3.3 V/5 V logic interfaces. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking - simplifies manufacturing logistics. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach the transceiver input stage. Use Value: Prevents latch-up or permanent damage to automotive-grade transceivers rated ≤ 180 V, leveraging P4SMA170AHM3/H's 234 V clamping at 1.3 A. |
Use Scenario: Shielding digital input modules in programmable logic controllers from inductive kickback generated by solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines to absorb 400 W surges without degradation across 100,000+ cycles. Use Value: Maintains signal integrity during factory automation events where 10/1000 µs transients exceed 150 V - enabled by 145 V VWM and AEC-Q101 robustness. |
| Telecom Line Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors against lightning-induced surges on RJ45 ports in outdoor access points. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC lines (e.g., 12 V bias rails) upstream of DC-DC converters. Use Value: Delivers 234 V clamping within <1 ns to prevent overvoltage propagation to isolated DC-DC stages - validated per IEC 61000-4-5. |
Use Scenario: Secondary-side transient suppression in AC/DC adapters for smart home devices exposed to mains-borne surges. IC Role / Device Role / Timing Role: Unidirectional TVS on 5 V/9 V output rails to protect USB-C PD controllers and microcontrollers from conducted noise. Use Value: Low 1.0 µA leakage at 145 V prevents standby current drain; halogen-free HM3 suffix meets global eco-regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | Same VWM (145 V), but SMB package (DO-214AA); 600 W PPPM rating; higher RθJA (100 °C/W vs. 120 °C/W). | Higher power handling suits larger PCB areas; less space-constrained than SMA; not AEC-Q101 qualified in standard grade. | Select SMBJ170A when 600 W surge margin is required and board layout allows larger footprint; verify AEC-Q101 need is met via SMBJ170AHM3 variant. |
| 1.5SMC170A | Same VWM and VBR range, but SMC (DO-214AB) package; 1500 W PPPM; RθJA = 50 °C/W; larger thermal mass. | Used in high-reliability industrial power supplies where sustained surge duty cycle exceeds P4SMA170AHM3/H capability. | Choose 1.5SMC170A for >1000 W surge immunity needs and improved thermal performance; requires larger pad layout and higher assembly cost. |
Compared with SMBJ170A and 1.5SMC170A, P4SMA170AHM3/H offers optimal balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint - making it preferred for space-limited automotive and consumer designs where 400 W surge protection suffices.
Availability
P4SMA170AHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA170AHM3/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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is designed for robust, surface-mount transient suppression in automotive, industrial, and communications systems - prioritizing AEC-Q101 qualification, low-profile packaging, and precise clamping performance across wide voltage ranges.
FAQ
What is the clamping voltage of P4SMA170AHM3/H at its rated peak pulse current?
The P4SMA170AHM3/H has a maximum clamping voltage (VC) of 234 V at 1.3 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures downstream components see no more than 234 V during surge events, directly supporting design margins for 150–200 V-rated semiconductors. The clamping performance is guaranteed across the full operating temperature range of −65 °C to +150 °C.
Is P4SMA170AHM3/H qualified for automotive applications?
Yes, P4SMA170AHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's ordering information table (Document 88367, page 3). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance - making it suitable for under-hood and cabin electronics such as engine control units, ADAS sensors, and body control modules.
What does the "HM3" suffix mean in P4SMA170AHM3/H?
The "HM3" suffix in P4SMA170AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates halogen-free molding compound, "M3" confirms compliance with JEDEC J-STD-203 and IEC 61249-2-21, and the "/H" packaging code specifies 7-inch tape-and-reel delivery (1800 units per reel). This suffix replaces older "E3" or "HE3" variants for stricter environmental and automotive requirements.
How does the thermal performance of P4SMA170AHM3/H affect PCB layout?
P4SMA170AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, which requires adherence to Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per terminal to achieve rated 400 W pulse power. Reducing pad size increases thermal impedance, derating both peak power and steady-state dissipation - potentially causing thermal runaway during repetitive surges if layout deviates from spec.
Can P4SMA170AHM3/H be used in bidirectional configurations?
No, P4SMA170AHM3/H is a unidirectional TVS diode, as confirmed by its part number ending in "A" (not "CA") and polarity marking (cathode band). Bidirectional operation requires CA-suffixed variants like P4SMA170CA. Using P4SMA170AHM3/H in bidirectional signal paths risks forward conduction during negative transients, leading to improper clamping and possible device failure.
P4SMA170AHM3/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:
- 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:
- 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/H FAQ
1.How can I place an order for P4SMA170AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170AHM3/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 P4SMA170AHM3/H reliable?
The price and inventory of P4SMA170AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA170AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170AHM3/H?
P4SMA170AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170AHM3/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 P4SMA170AHM3/H?
For technical support, including P4SMA170AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170AHM3/H requirements.
6.How does Aetrix verify that P4SMA170AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA170AHM3/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 P4SMA170AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA170AHM3/H?
All P4SMA170AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170AHM3/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 P4SMA170AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA170AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA170AHM3/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
