My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA170AHM3_A/H
- Part No.:
- P4SMA170AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170AHM3_A/H.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA170AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 170 V standoff voltage (VWM), 189 V minimum breakdown voltage (VBR), 234 V maximum clamping voltage (VC) at 1.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA170AHM3_A/H datasheet, P4SMA170AHM3_A/H pinout, P4SMA170AHM3_A/H application, or P4SMA170AHM3_A/H equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse breakdown behavior and fast response (<1 ns). Its clamping action begins at VBR = 162–179 V (tested at 1 mA), limiting transient voltages to ≤234 V while sustaining 400 W peak pulse power - derated to 300 W above 91 V per specification.
The P4SMA170AHM3_A/H is rated for TJ = –65 °C to +150 °C, meets MSL Level 1 (reflow peak 260 °C), and carries halogen-free, RoHS-compliant construction with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Polarity is marked by cathode band; no marking on bidirectional variants.
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 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 during worst-case surge. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs surges; derated to 300 W above 91 V per thermal limits. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard PCB layout; dictates power derating above 25 °C ambient. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush or fault-current handling in unidirectional use. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when V > VBR. |
| Anode (unbanded end) | Reference/ground return path | Typically tied to system ground or low-impedance return; completes clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without external heatsinking on standard pads. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without preconditioning or special profile adjustments. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring extended lifetime and failure mode coverage. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power rails from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground, clamping spikes within nanoseconds. Use Value: Limits voltage to ≤234 V during 400 W surges, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. |
Use Scenario: Shields 24 V digital input circuits from field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS on input line to isolate programmable logic controller (PLC) input stage from EFT and surge events. Use Value: Maintains 145 V DC operating margin while clamping 1 kV/42 Ω surges to safe levels per IEC 61000-4-4/5 compliance. |
| Telecom Power Supply Front-End | Sensor Signal Line Protection (e.g., RTD, Thermocouple) |
Use Scenario: Guards AC/DC converter primary-side bias rails and optocoupler inputs against lightning-induced surges on telecom base station power feeds. IC Role / Device Role / Timing Role: Primary-side transient suppressor on 48 V intermediate bus, coordinated with MOV and fuse. Use Value: Fast response and low clamping voltage reduce stress on downstream regulators and isolation components during multi-kV events. |
Use Scenario: Installed on analog front-end of precision temperature measurement modules exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on differential sensor lines, minimizing signal distortion. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) without affecting <100 nA bias currents or introducing measurable offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170A-E3/5A | Same VWM/VBR/VC specs; 3.0 W steady-state power (vs. 3.3 W); non-AEC-Q101; RoHS-compliant only. | Commercial-grade use only; not validated for automotive temperature cycling or HTRB stress. | Select when AEC-Q101 is unnecessary and cost sensitivity outweighs automotive qualification. |
| 1.5SMC170AHE3_A | Higher package thermal mass (SMC/DO-214AB); 1.5 kW peak power; same VWM/VBR but higher VC (243 V); AEC-Q101 qualified. | Requires larger PCB footprint; suited for higher-energy surges where 400 W is insufficient. | Choose for applications needing >400 W surge handling or improved thermal dissipation on high-power boards. |
Compared with SMAJ170A-E3/5A, P4SMA170AHM3_A/H offers AEC-Q101 validation and halogen-free compliance; versus 1.5SMC170AHE3_A, it provides smaller SMA footprint and lower clamping voltage at the expense of peak power headroom - ideal for space-constrained automotive and industrial PCBs.
Availability
P4SMA170AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power supply designs requiring stable component supply, AEC-Q101 qualification, and consistent surge immunity performance across production batches.
Supply support for P4SMA170AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the maximum clamping voltage of P4SMA170AHM3_A/H under a 10/1000 µs surge?
The P4SMA170AHM3_A/H has a maximum clamping voltage (VC) of 234 V when subjected to its rated peak pulse current of 1.3 A with a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the upper limit of voltage imposed on the protected circuit during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is P4SMA170AHM3_A/H qualified for automotive applications?
Yes, P4SMA170AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD - making P4SMA170AHM3_A/H suitable for under-hood and cabin electronics where reliability under thermal and mechanical stress is mandatory.
What does the "_A/H" suffix mean in P4SMA170AHM3_A/H?
The "_A/H" suffix in P4SMA170AHM3_A/H indicates two attributes: "A" denotes AEC-Q101 qualification level for the P4SMA6.8A–P4SMA220A voltage range, and "H" specifies packaging in 7-inch diameter plastic tape and reel with 1800 units per reel. The "HM3" portion confirms halogen-free, RoHS-compliant construction - all verified in Vishay's ordering information table on page 3 of document 88367.
Can P4SMA170AHM3_A/H be used in bidirectional configurations?
No, P4SMA170AHM3_A/H is a unidirectional TVS diode, as indicated by the "A" (not "CA") suffix and cathode band marking. Bidirectional operation requires the "CA" variant (e.g., P4SMA170CA), which lacks polarity marking and exhibits symmetric clamping in both directions. Using P4SMA170AHM3_A/H in reverse-biased AC applications risks permanent breakdown or failure due to lack of reverse conduction capability.
What is the thermal resistance and how does it affect P4SMA170AHM3_A/H derating?
P4SMA170AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per datasheet note. This value directly determines power derating: at 75 °C ambient, the allowable steady-state power drops to ~1.8 W (calculated via (150 °C − 75 °C)/120 °C/W), requiring careful layout and thermal management in high-temperature environments.
P4SMA170AHM3_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:
- 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/H FAQ
1.How can I place an order for P4SMA170AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170AHM3_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 P4SMA170AHM3_A/H reliable?
The price and inventory of P4SMA170AHM3_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 P4SMA170AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA170AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170AHM3_A/H?
P4SMA170AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170AHM3_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 P4SMA170AHM3_A/H?
For technical support, including P4SMA170AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA170AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA170AHM3_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 P4SMA170AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA170AHM3_A/H?
All P4SMA170AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170AHM3_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 P4SMA170AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA170AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA170AHM3_A/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 …
