My Inquiry
My Account
Vishay General Semiconductor - Diodes Division P4SMA20CAHE3/61
- Part No.:
- P4SMA20CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20CAHE3/61.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA20CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal or power lines. It features a 20 V standoff voltage (VWM), 22.8 V minimum breakdown voltage (VBR), 27.7 V maximum clamping voltage (VC) at 14.4 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the P4SMA20CAHE3/61 datasheet, P4SMA20CAHE3/61 pinout, P4SMA20CAHE3/61 application, or P4SMA20CAHE3/61 equivalent, key selection considerations include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal derating above 25 °C ambient.
Technical Context
The P4SMA20CAHE3/61 operates as a bidirectional avalanche diode, symmetrically clamping transient voltages in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
Rated for 400 W peak pulse power (10/1000 µs) and 3.3 W steady-state power dissipation, it supports operation from −65 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is AEC-Q101 qualified and RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 20 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 22.8 V min / 25.2 V max at 1 mA - ensures reliable avalanche conduction onset within tight tolerance for predictable protection threshold. |
| VC (Clamping Voltage) | 27.7 V max at 14.4 A IPPM - limits transient voltage seen by downstream circuitry during 10/1000 µs surge events. |
| PPPM (Peak Pulse Power) | 400 W - sustains high-energy transients (e.g., ISO 7637-2 pulse 1/2a/5a) without failure when mounted on 5.0 mm × 5.0 mm copper pads. |
| ID (Reverse Leakage) | 1.0 µA max at 20 V - negligible standby current ensures minimal impact on low-power signal integrity or battery drain. |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained industrial PCB layouts. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
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; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive transients - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., CAN, RS-485, sensor bridges) without polarity concerns. |
| 400 W peak pulse power | Withstands high-energy surges such as ISO 16750-2 load dump simulations and IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs). |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability under thermal stress. |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity precautions - eliminates bake-out step and reduces assembly cost. |
| Glass passivated junction | Provides stable leakage performance and consistent VBR over lifetime, critical for mission-critical protection in industrial PLCs. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential sensor outputs to clamp ±2 kV ESD and 100 V/100 ms load dump transients. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADCs while maintaining <1 µA leakage at 20 V supply rails. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation networks subject to cable-induced lightning surges. IC Role / Device Role / Timing Role: Placed line-to-line (A–B) and line-to-ground to suppress common-mode transients up to 400 W without signal distortion. Use Value: Maintains data integrity at 10 Mbps by limiting clamping voltage to 27.7 V, well below transceiver absolute maximum ratings. |
| Consumer USB Port ESD | Power Supply Input Stage |
|
Use Scenario: ESD protection for USB 2.0 D+/D− lines in portable medical devices requiring IEC 61000-4-2 Level 4 compliance. IC Role / Device Role / Timing Role: Bidirectional TVS connected between D+ and D− to shunt ±15 kV contact discharge energy away from PHY IC. Use Value: Achieves sub-nanosecond response and <0.5 pF junction capacitance (typ.) - avoids signal rise-time degradation at 480 Mbps. |
Use Scenario: Secondary-side transient suppression on 24 V DC input rails of programmable logic controllers after DC/DC conversion. IC Role / Device Role / Timing Role: Mounted across input capacitor to absorb inductive kickback from relay coils and motor drivers. Use Value: Handles repetitive 300 W surges (duty cycle ≤0.01%) without degradation, supporting >100,000 switching cycles in industrial duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same VWM/VBR/VC specs but SMB (DO-214AA) package - 2.59 mm height vs. SMA's 2.29 mm; 600 W PPPM rating. | Higher power handling suits higher-energy surge environments; larger footprint may conflict with dense layouts. | Select SMBJ20CA only if board space allows and 600 W surge margin is required beyond P4SMA20CAHE3/61's 400 W rating. |
| 1.5KE20CA | Through-hole DO-15 package; same electrical specs but 1500 W PPPM, higher thermal mass, and no AEC-Q101 qualification. | Used in legacy industrial power supplies where manual assembly or high-surge immunity outweighs SMT and automotive compliance needs. | Choose 1.5KE20CA for cost-sensitive, non-automotive applications where PCB real estate and reflow compatibility are not constraints. |
Compared with SMBJ20CA and 1.5KE20CA, the P4SMA20CAHE3/61 uniquely combines AEC-Q101 qualification, low-profile SMA packaging, and verified 400 W surge capability - making it optimal for space-constrained automotive and industrial SMT designs requiring certified reliability.
Availability
P4SMA20CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, consumer USB ESD protection, and DC power input stages requiring stable component supply and long-term lifecycle continuity.
Supply support for P4SMA20CAHE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series is engineered for robust transient suppression in automotive, industrial, and communications systems - delivering standardized TVS performance in compact, AEC-Q101-qualified surface-mount packages.
FAQ
What is the clamping voltage of P4SMA20CAHE3/61 at its rated peak pulse current?
The P4SMA20CAHE3/61 has a maximum clamping voltage (VC) of 27.7 V at 14.4 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value ensures protected circuits remain within safe voltage limits during surge events. The P4SMA20CAHE3/61 maintains this clamping performance across its full operating temperature range of −65 °C to +150 °C.
Is P4SMA20CAHE3/61 suitable for automotive applications?
Yes, P4SMA20CAHE3/61 is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its qualification covers temperature cycling, high-temperature reverse bias, and ESD testing. The P4SMA20CAHE3/61 also meets MSL Level 1 for lead-free reflow, supporting modern automotive manufacturing processes.
How does the bidirectional configuration of P4SMA20CAHE3/61 affect its PCB layout?
The P4SMA20CAHE3/61 has no polarity marking and functions identically in both directions, simplifying layout by eliminating orientation checks during automated placement. It must be placed symmetrically across the protected nodes (e.g., line-to-line or line-to-ground), with equal copper pad area (minimum 5.0 mm × 5.0 mm per terminal) to maintain specified 400 W pulse power rating. The P4SMA20CAHE3/61 requires no additional biasing or external components.
What is the maximum steady-state power dissipation for P4SMA20CAHE3/61?
The P4SMA20CAHE3/61 has a maximum steady-state power dissipation (PD) of 3.3 W at 50 °C ambient temperature on an infinite heatsink. In typical PCB conditions, derating applies per Figure 2 of the datasheet - e.g., ~2.2 W at 70 °C ambient. This rating governs continuous leakage-related heating and must be considered alongside transient duty cycle in thermal design. The P4SMA20CAHE3/61's RθJA of 120 °C/W informs board-level thermal management.
Does P4SMA20CAHE3/61 have a specified junction capacitance?
Junction capacitance is not explicitly specified for P4SMA20CAHE3/61 in the provided documentation. However, based on the P4SMA series trend (e.g., P4SMA10CA: ~250 pF at 0 V), the P4SMA20CAHE3/61 is estimated to exhibit ~150–200 pF at 0 V, decreasing significantly at VWM = 20 V. For high-speed signal lines, designers should verify via bench measurement or select lower-capacitance alternatives like the SMF series if bandwidth exceeds 10 MHz. The P4SMA20CAHE3/61 datasheet does not publish a guaranteed CJ value.
P4SMA20CAHE3/61 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA20CAHE3/61 FAQ
1.How can I place an order for P4SMA20CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20CAHE3/61 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 P4SMA20CAHE3/61 reliable?
The price and inventory of P4SMA20CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA20CAHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA20CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20CAHE3/61?
P4SMA20CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20CAHE3/61 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 P4SMA20CAHE3/61?
For technical support, including P4SMA20CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20CAHE3/61 requirements.
6.How does Aetrix verify that P4SMA20CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA20CAHE3/61 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 P4SMA20CAHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA20CAHE3/61?
All P4SMA20CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20CAHE3/61, 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 P4SMA20CAHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA20CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA20CAHE3/61 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 …
