My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA20AHE3/5A
- Part No.:
- P4SMA20AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20AHE3/5A.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA20AHE3/5A 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 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 27.7 V clamping voltage at 14.4 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 P4SMA20AHE3/5A datasheet, P4SMA20AHE3/5A pinout, P4SMA20AHE3/5A application, or P4SMA20AHE3/5A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity marking, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
The P4SMA20AHE3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (19.0–21.0 V at 1 mA test current). Its glass-passivated junction ensures stable leakage (<1.0 µA at 17.1 V) and fast response time (<1.0 ns), enabling effective suppression of ESD and inductive switching transients.
Thermally, it supports operation from –65 °C to +150 °C junction temperature, with derated peak pulse power above 25 °C ambient per Fig. 2. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and revision code "A" in ordering nomenclature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 14.4 A - peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - maximum non-repetitive surge energy absorption capability; rated at TA = 25 °C on specified PCB pad layout. |
| IFSM (Surge Current) | 40 A - peak forward surge current handling (8.3 ms half-sine); validates robustness against accidental forward overloads. |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance; informs minimum copper pad area and airflow requirements for sustained power dissipation. |
| TJ max. | +150 °C - maximum allowable junction temperature; sets upper limit for thermal design margin in enclosed or high-ambient environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. 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 reverse surge current to ground or lower-potential rail during overvoltage events. |
| Anode (unbanded end) | Reference potential node | Typically tied to system ground or common return path; completes clamping loop during transient conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - enables use in engine control, ADAS, and infotainment systems. |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without external series impedance in many low-energy interfaces. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term parameter stability across temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at peak 260 °C - compatible with standard lead-free SMT assembly without dry-pack or baking. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS inputs. |
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 inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative transients while blocking normal operating voltage. Use Value: Clamps 27.7 V at 14.4 A, limiting stress on 3.3 V or 5 V interface ICs; AEC-Q101 qualification ensures compliance with ISO 7637-2 pulse 1/2/5a requirements. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 400 W pulses without degradation over >100,000 cycles. Use Value: 17.1 V VWM allows full 24 V nominal operation while rejecting transients up to 27.7 V; DO-214AC package fits compact DIN-rail module layouts. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD power supplies subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Unidirectional clamping device between +VOUT and GND, activated only during fault conditions exceeding 17.1 V. Use Value: 400 W rating handles IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs) surges; RoHS-compliant HE3 suffix meets global regulatory requirements. |
Use Scenario: Protecting Ethernet PHYs and RS-485 transceivers on telecom equipment front-ends from induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential data lines, minimizing signal distortion while providing sub-30 V clamping. Use Value: Junction capacitance <100 pF (typ.) at VWM preserves signal integrity up to 100 Mbps; 27.7 V VC aligns with 3.3 V receiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Same VWM/VBR/VC, but SMB package (DO-214AA); 600 W PPPM; RθJA = 85 °C/W. | Higher power handling and better thermal performance, but larger footprint (4.58 mm × 3.94 mm vs. 4.50 mm × 2.79 mm). | Select SMBJ20A when board space permits and higher surge repetition rate or thermal margin is required. |
| 1.5SMC20A | Same electrical specs, but SMC package (DO-214AB); 1500 W PPPM; RθJA = 50 °C/W; higher IPPM (65.2 A). | Designed for high-energy industrial surges; requires larger pad layout and may not fit miniaturized designs. | Choose 1.5SMC20A for heavy-duty applications like motor drives or outdoor telecom where 1500 W rating is mandatory. |
Compared with SMBJ20A and 1.5SMC20A, the P4SMA20AHE3/5A offers optimal balance of AEC-Q101 qualification, compact DO-214AC footprint, and sufficient 400 W surge capacity for cost-sensitive automotive and industrial control nodes - making it preferred where board area and automotive compliance are primary constraints.
Availability
P4SMA20AHE3/5A 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, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for P4SMA20AHE3/5A 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for robust transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems where AEC-Q101 qualification and consistent clamping performance are critical.
FAQ
What is the clamping voltage of the P4SMA20AHE3/5A under a 10/1000 µs surge?
The P4SMA20AHE3/5A has a maximum clamping voltage (VC) of 27.7 V at 14.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards and represents the highest voltage imposed on the protected circuit during surge conduction. The P4SMA20AHE3/5A maintains this clamping performance across its qualified temperature range.
Is the P4SMA20AHE3/5A qualified for automotive applications?
Yes, the P4SMA20AHE3/5A is AEC-Q101 qualified, as confirmed by the "HE3" suffix and revision code "A" in its full part number. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. The P4SMA20AHE3/5A is approved for use in automotive subsystems such as body control modules, sensor interfaces, and infotainment power rails.
What does the "/5A" suffix indicate in P4SMA20AHE3/5A?
The "/5A" suffix denotes the packaging configuration: 13-inch diameter plastic tape and reel containing 7500 units. This format supports high-volume automated SMT placement and is distinct from the "/61" option (7-inch reel, 1800 units). The P4SMA20AHE3/5A uses RoHS-compliant matte tin plating and meets JESD201 Class 2 whisker resistance requirements.
How does the P4SMA20AHE3/5A differ from bidirectional variants like P4SMA20CA?
The P4SMA20AHE3/5A is unidirectional, with cathode marked by a band and intended for clamping only in reverse bias - ideal for DC power line protection. In contrast, P4SMA20CA is bidirectional, symmetrical, and lacks polarity marking; it suppresses transients on AC or differential lines. Their VBR, VC, and PPPM values differ slightly due to internal structure, and they are not interchangeable without circuit review. The P4SMA20AHE3/5A must be oriented correctly during placement.
What is the maximum operating temperature for the P4SMA20AHE3/5A?
The P4SMA20AHE3/5A has a maximum junction temperature (TJ) of +150 °C and an operating storage temperature range of –65 °C to +150 °C. Its thermal resistance (RθJA) is 120 °C/W, meaning junction temperature rise is directly proportional to power dissipation and ambient conditions. Derating curves in Figure 2 of the datasheet specify allowable PPPM reduction above 25 °C ambient - critical for sustained surge duty in sealed enclosures. The P4SMA20AHE3/5A remains fully functional within these limits.
P4SMA20AHE3/5A 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- Power - Peak Pulse:
- 400W
- 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)
P4SMA20AHE3/5A FAQ
1.How can I place an order for P4SMA20AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20AHE3/5A 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 P4SMA20AHE3/5A reliable?
The price and inventory of P4SMA20AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA20AHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA20AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20AHE3/5A?
P4SMA20AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20AHE3/5A 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 P4SMA20AHE3/5A?
For technical support, including P4SMA20AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20AHE3/5A requirements.
6.How does Aetrix verify that P4SMA20AHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA20AHE3/5A 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 P4SMA20AHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA20AHE3/5A?
All P4SMA20AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20AHE3/5A, 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 P4SMA20AHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA20AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA20AHE3/5A 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 …
