My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA8.2AHM3/I
- Part No.:
- P4SMA8.2AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2AHM3/I.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,122
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA8.2AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping transient overvoltages on power and signal lines. It features a 7.79 V to 8.61 V breakdown voltage (VBR at 10 mA), 7.02 V maximum stand-off voltage (VWM), and 12.1 V clamping voltage (VC) at 33.1 A peak pulse current - optimized for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial environments.
For engineers reviewing the P4SMA8.2AHM3/I datasheet, P4SMA8.2AHM3/I pinout, P4SMA8.2AHM3/I application, or P4SMA8.2AHM3/I equivalent, key selection criteria include its AEC-Q101 qualification, 400 W peak pulse power rating (10/1000 µs), low 0.065 %/°C temperature coefficient of VBR, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
The P4SMA8.2AHM3/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable, repeatable clamping behavior under fast-rising transients. Its 10/1000 µs waveform response delivers 33.1 A peak pulse current while limiting voltage to 12.1 V, enabling robust protection of 5 V–12 V rail systems without compromising signal integrity.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to +150 °C junction temperature. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.79 V / 8.61 V at 10 mA - defines reliable avalanche initiation threshold for consistent clamping onset |
| VWM | 7.02 V - maximum continuous reverse voltage before leakage exceeds 200 µA, compatible with 5 V logic rails |
| VC @ IPPM | 12.1 V at 33.1 A - clamped voltage during 400 W transient, ensuring downstream devices remain below absolute max ratings |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capacity for inductive switch-off and ESD events |
| IFSM | 40 A (8.3 ms half-sine) - surge current handling for short-duration line faults without bond wire failure |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial enclosures |
| Temp. Coeff. VBR | 0.065 %/°C - minimal drift across operating range, critical for precision voltage margining |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected circuit ground or low-side reference; completes clamping loop during overvoltage |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 5 V rail); conducts when VAK > VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1, supporting green manufacturing and lead-free assembly |
| 400 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation |
| Glass-passivated junction | Ensures stable VBR and low leakage (<200 µA at VWM) over lifetime and temperature extremes |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, preserving timing margins in high-speed interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 5 V supply rails in engine control units (ECUs) and body control modules against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 5 V rail and chassis ground to clamp spikes above 7.02 V before they reach microcontrollers or CAN transceivers. Use Value: Limits clamped voltage to 12.1 V during 400 W surges, maintaining safe operating area for 16 V-rated automotive ICs and preventing latch-up. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface to absorb sub-100 ns ESD pulses before reaching op-amp input stages. Use Value: Sub-12.1 V clamping ensures sensor amplifier inputs stay within ±15 V absolute maximum rating, eliminating need for additional series impedance. |
| Consumer Device USB Port Protection | Telecom DC Power Input Stage |
Use Scenario: Shielding USB VBUS lines in portable medical monitors and smart home hubs from hot-plug transients and contact ESD. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-VBUS, providing low-capacitance (<100 pF) clamping without signal distortion. Use Value: 7.02 V VWM allows full 5 V operation while clamping to 12.1 V - compliant with USB 2.0 voltage tolerance and IEC 61000-4-2 Level 4. |
Use Scenario: Front-end surge suppression on -48 V telecom power feeds exposed to lightning-induced surges in remote radio units. IC Role / Device Role / Timing Role: TVS used in conjunction with MOVs and gas discharge tubes to handle initial high-energy strike and refine clamping level. Use Value: 400 W rating and 12.1 V clamping enable coordination with upstream protectors to limit let-through energy to <10 mJ for downstream DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | VBR = 8.89–9.82 V, VWM = 8.0 V, VC = 12.5 V @ 32.4 A - slightly higher clamping and stand-off | Marginally less suitable for tight 5 V rail designs where 7.02 V VWM provides larger noise immunity gap | Select when system tolerates 8.0 V VWM and requires broader VBR tolerance band |
| 1.5SMC8.2A | Higher power (1500 W), larger SMC (DO-214AB) package, VBR = 7.79–8.61 V - identical electrical specs but different thermal profile | Requires PCB layout change due to larger footprint and higher thermal mass; better for sustained surge duty cycles | Choose only if 400 W is insufficient and board space allows SMC package |
Compared with SMAJ8.0A and 1.5SMC8.2A, the P4SMA8.2AHM3/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and precise 7.02 V VWM - making it preferred for space-constrained automotive and industrial PCBs requiring certified reliability without layout redesign.
Availability
P4SMA8.2AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power ports, and telecom DC input stages requiring stable component supply with guaranteed long-term continuity.
Supply support for P4SMA8.2AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and consumer electronics - engineered for automated SMT assembly, AEC-Q101 compliance, and robust performance under harsh environmental conditions.
FAQ
What is the maximum clamping voltage of the P4SMA8.2AHM3/I under standard test conditions?
The P4SMA8.2AHM3/I has a maximum clamping voltage (VC) of 12.1 V at 33.1 A peak pulse current, measured using the industry-standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures downstream components remain within safe voltage limits during transient events. The P4SMA8.2AHM3/I achieves this with low incremental surge resistance and stable avalanche characteristics.
Is the P4SMA8.2AHM3/I qualified for automotive applications?
Yes, the P4SMA8.2AHM3/I carries AEC-Q101 qualification, verified through rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per the AEC-Q101-004 standard. Its HM3 suffix explicitly denotes halogen-free, RoHS-compliant, and automotive-grade construction - making the P4SMA8.2AHM3/I suitable for under-hood and chassis-mounted modules in passenger vehicles and commercial fleets.
What does the "HM3/I" suffix indicate in P4SMA8.2AHM3/I?
The "HM3" portion signifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification, while "/I" denotes packaging in 13-inch diameter plastic tape and reel with 7500 units per reel - optimized for high-volume SMT placement. This distinguishes the P4SMA8.2AHM3/I from E3/M3 variants (commercial grade) and HE3/HM3_H (7-inch reel). The full P4SMA8.2AHM3/I part number ensures traceability to automotive-grade material and process controls.
How does the P4SMA8.2AHM3/I compare to bidirectional TVS diodes in the same series?
The P4SMA8.2AHM3/I is unidirectional and intended for DC line protection where polarity is fixed, such as 5 V power rails. Bidirectional variants like P4SMA8.2CA have symmetric clamping in both directions and are used for AC or data-line protection. The P4SMA8.2AHM3/I offers lower leakage and tighter VBR tolerance than its bidirectional counterparts, but cannot be used on floating or AC-coupled signals - correct polarity orientation is mandatory for the P4SMA8.2AHM3/I.
What is the thermal resistance of the P4SMA8.2AHM3/I, and how does it affect PCB layout?
The P4SMA8.2AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on 0.2" × 0.2" copper pads. To maintain reliability at full 3.3 W steady-state dissipation, designers must provide adequate copper pour and avoid thermal isolation. The P4SMA8.2AHM3/I's SMA package supports standard reflow profiles but requires adherence to Vishay's recommended pad layout to achieve specified thermal performance.
P4SMA8.2AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 33.1A
- 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)
P4SMA8.2AHM3/I FAQ
1.How can I place an order for P4SMA8.2AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2AHM3/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 P4SMA8.2AHM3/I reliable?
The price and inventory of P4SMA8.2AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA8.2AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2AHM3/I?
P4SMA8.2AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2AHM3/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 P4SMA8.2AHM3/I?
For technical support, including P4SMA8.2AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2AHM3/I requirements.
6.How does Aetrix verify that P4SMA8.2AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2AHM3/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 P4SMA8.2AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA8.2AHM3/I?
All P4SMA8.2AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2AHM3/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 P4SMA8.2AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA8.2AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA8.2AHM3/I 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 …
