My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA30A-E3/5A
- Part No.:
- P4SMA30A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30A-E3/5A.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,051
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA30A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 30 V standoff voltage (VWM), 31.5 V maximum breakdown voltage (VBR), 41.4 V clamping voltage at 9.7 A peak pulse current, and 400 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the P4SMA30A-E3/5A datasheet, P4SMA30A-E3/5A pinout, P4SMA30A-E3/5A application, or P4SMA30A-E3/5A equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, thermal derating above 25 °C, unidirectional polarity marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA30A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (28.5–31.5 V at 1 mA). Its glass-passivated junction ensures stable leakage (<1 µA at 25.6 V) and fast response time (<1 ns), enabling suppression of ESD and inductive switching spikes before downstream components are damaged.
Thermally, it exhibits 120 °C/W junction-to-ambient resistance under standard PCB layout, limiting continuous power dissipation to 3.3 W at 50 °C ambient. The device is rated for operation from –65 °C to +150 °C junction temperature and qualified to AEC-Q101 for automotive use - confirmed by HE3/HM3 suffix variants, though P4SMA30A-E3/5A itself is commercial-grade RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - maximum DC or RMS voltage the device blocks without clamping; sets upper limit for protected line operating voltage. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1 mA - defined voltage range where avalanche conduction begins; determines transient trigger threshold. |
| VC (Clamping Voltage) | 41.4 V at 9.7 A IPPM - maximum voltage seen by protected circuit during 10/1000 µs surge; must stay below IC absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W - surge energy handling capacity under standardized 10/1000 µs waveform; derates to 300 W above 91 V models (not applicable here). |
| ID (Reverse Leakage) | <1 µA at 25.6 V - negligible standby current draw; avoids loading low-power sensor or battery-backed circuits. |
| Package | SMA (DO-214AC) - surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with JEDEC-standard reflow profiles. |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when reverse voltage exceeds VBR. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil flyback or motor commutation without failure. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow; supports direct placement into high-volume SMT lines. |
| AEC-Q101 qualification pathway | Base P4SMA30A series supports automotive-grade variants (HE3/HM3); design-in confidence for Tier 1 suppliers. |
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 ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and chassis ground, triggered within nanoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤41.4 V, preserving integrity of 3.3 V or 5 V microcontrollers and ADC front-ends. |
Use Scenario: Shielding digital input modules from field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: Withstands repetitive 400 W surges while maintaining <1 µA leakage, avoiding false triggering in high-impedance sensing circuits. |
| Consumer Power Adapter Output | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on 12 V or 19 V DC outputs of wall adapters and laptop chargers. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output rail, absorbing residual spikes escaping primary-side MOVs and Y-capacitors. Use Value: Fast response prevents latch-up in connected USB-PD controllers or PMICs during hot-plug events. |
Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers against lightning-induced surges on building entry points. IC Role / Device Role / Timing Role: First-line unidirectional suppressor on DC bias rails feeding isolated data lines. Use Value: 41.4 V clamping ensures safe operation with 3.3 V or 5 V logic-level transceivers while meeting IEC 61000-4-5 Level 3 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 |
|---|---|---|---|
| SMBJ30A (Bourns) | Same VWM (25.6 V), higher VC (48.4 V at 8.3 A), SMB package (larger footprint, higher thermal mass) | Preferred where board space allows larger pad layout and higher thermal inertia is needed for repetitive surges | Select SMBJ30A if PCB layout accommodates 4.57 mm × 3.94 mm SMB footprint and system requires >3.3 W steady-state dissipation margin. |
| 1.5SMC33A (ON Semiconductor) | Higher VWM (28.2 V), same VC (48.4 V), SMC package (DO-214AB, 7.11 mm × 6.22 mm) | Better suited for 3.3 V rail protection where tighter VWM margin is acceptable, but requires larger board area | Choose 1.5SMC33A only when protecting 3.3 V systems with headroom up to 28.2 V and SMC mounting is already standardized. |
Compared with P4SMA30A-E3/5A, SMBJ30A offers greater thermal robustness in SMB form factor but sacrifices clamping tightness, while 1.5SMC33A provides higher standoff voltage at the cost of significantly larger footprint and less precise 30 V targeting - making P4SMA30A-E3/5A optimal for space-constrained 24–30 V applications requiring minimal clamping overshoot.
Availability
P4SMA30A-E3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and consumer power adapter designs requiring stable component supply, RoHS compliance, and high-volume tape-and-reel delivery (7500 pcs per 13″ reel).
Supply support for P4SMA30A-E3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in consumer, industrial, and automotive electronics - engineered for automated assembly, consistent clamping performance, and broad voltage coverage from 6.8 V to 540 V.
FAQ
What is the maximum clamping voltage of the P4SMA30A-E3/5A under standard test conditions?
The P4SMA30A-E3/5A has a maximum clamping voltage (VC) of 41.4 V when subjected to a 10/1000 µs surge waveform at 9.7 A peak pulse current. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during transient events. Designers must ensure this clamping level remains safely below the absolute maximum ratings of downstream ICs.
Is the P4SMA30A-E3/5A suitable for automotive applications?
The P4SMA30A-E3/5A is RoHS-compliant and manufactured using Vishay's commercial-grade process. While the base P4SMA30A series supports AEC-Q101-qualified variants (e.g., P4SMA30AHE3_A), the P4SMA30A-E3/5A itself is not AEC-Q101 certified. For automotive use, engineers should specify the HE3 or HM3 suffix versions; the P4SMA30A-E3/5A is appropriate for non-safety-critical industrial or consumer applications.
How does the P4SMA30A-E3/5A differ from bidirectional TVS diodes like P4SMA30CA?
The P4SMA30A-E3/5A is unidirectional and features a cathode band for polarity identification, allowing it to conduct only during reverse overvoltage events - ideal for DC power rails or single-polarity signal lines. In contrast, P4SMA30CA is bidirectional, symmetric in both directions, and lacks polarity marking; it is used for AC lines or differential buses like RS-485. Their VWM, VBR, and VC values differ accordingly, and they are not interchangeable without circuit review.
What is the thermal resistance and power derating behavior of the P4SMA30A-E3/5A?
The P4SMA30A-E3/5A 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. Its rated power dissipation is 3.3 W at 50 °C ambient, and it must be derated linearly above that temperature - dropping to zero at 150 °C junction. Derating curves are provided in Figure 2 of the Vishay datasheet 88367 to support thermal design validation.
Can the P4SMA30A-E3/5A be used in place of older P6KE33A through direct replacement?
No - the P4SMA30A-E3/5A is not a direct replacement for P6KE33A. The P6KE33A is a through-hole DO-15 device with different package dimensions, thermal characteristics, and electrical parameters (e.g., VWM = 28.2 V, VC = 49.9 V). Substituting P4SMA30A-E3/5A requires PCB redesign for SMA footprint, verification of clamping margin (41.4 V vs. 49.9 V), and revalidation of surge current handling due to differing thermal paths and surge waveform response.
P4SMA30A-E3/5A 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA30A-E3/5A FAQ
1.How can I place an order for P4SMA30A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30A-E3/5A 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 P4SMA30A-E3/5A reliable?
The price and inventory of P4SMA30A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA30A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30A-E3/5A?
P4SMA30A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30A-E3/5A 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 P4SMA30A-E3/5A?
For technical support, including P4SMA30A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30A-E3/5A requirements.
6.How does Aetrix verify that P4SMA30A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA30A-E3/5A 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 P4SMA30A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA30A-E3/5A?
All P4SMA30A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30A-E3/5A, 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 P4SMA30A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA30A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30A-E3/5A 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 …
