My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA20C
- Part No.:
- P4SMA20C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA20C.pdf
- Description:
- 400W, 20V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:5,750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA20C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection in DC power rails. It features a 20V working stand-off voltage (VWM), 22.0–24.2V breakdown voltage (VBR), 400W peak pulse power (PPPM), and clamps transients to ≤31.9V at 13.0A (10/1000μs waveform), commonly deployed in on-board DC/DC converters and SMPS input stages.
For engineers reviewing the P4SMA20C datasheet, P4SMA20C pinout, P4SMA20C application, or P4SMA20C equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 17.1V, and UL 94V-0 molding compound - all critical for automotive and industrial power rail hardening.
Technical Context
The P4SMA20C implements a single-die, bidirectional avalanche junction structure with glass passivated chip construction, enabling symmetrical clamping in both polarities. Its electrical behavior follows ANSI/IEEE C62.35 standards, with VBR tested at 1.0mA and clamping defined per 10/1000μs waveform per REA specifications.
Thermal derating begins above TA = 25°C per Fig.2, supporting continuous operation from –55°C to +150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, ensuring compatibility with standard reflow profiles without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating DC rail margin |
| VBR min/max | 22.0 / 24.2 V @ 1.0 mA - Tight breakdown tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 31.9 V @ 13.0 A - Clamping voltage during 10/1000μs surge; determines protected circuit's maximum transient exposure |
| PPPM | 400 W - Peak pulse power handling per non-repetitive 10/1000μs event; enables high-energy surge suppression |
| IR @ VWM | <1 μA - Ultra-low leakage preserves efficiency in low-power standby modes and high-impedance sensing nodes |
| Response time | <1.0 ps - Sub-picosecond junction response ensures clamping before sensitive ICs experience overstress |
| TJ max | +150 °C - Enables placement near hot components (e.g., MOSFETs, inductors) without thermal derating penalties |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; weight ≈0.060g; UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient current sink (bidirectional) | Accepts surge current in either polarity; no fixed anode/cathode function due to symmetrical construction |
| Cathode (banded end) | Transient current sink (bidirectional) | Same functional role as anode; band denotes polarity reference only - device operates identically in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| ISO 7637-2 compliance | Validated against automotive load dump and switching transient pulses (Pulse 1/2a/2b/3a/3b) |
| Glass passivated junction | Improves long-term reliability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| Fast response <1ps | Clamps ESD and fast-edge transients before propagation into downstream logic or analog circuitry |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input stage protection against line surges and inductive kickback in 24V/48V telecom or industrial SMPS. IC Role / Device Role / Timing Role: Primary transient shunt element placed directly across bulk capacitor input terminals. Use Value: Limits voltage excursion to ≤31.9V during 400W surges, preventing MOSFET gate oxide rupture and controller latch-up. | Use Scenario: Protection of point-of-load (POL) converter inputs in FPGA or ASIC power domains. IC Role / Device Role / Timing Role: Fast-clamping TVS placed upstream of buck controller IC to absorb board-level coupling transients. Use Value: Sub-1ps response prevents transient-induced reset or configuration corruption in digital loads. |
| Automotive Lighting Module | Industrial Adapter Interface |
Use Scenario: Overvoltage suppression on LED driver supply lines subject to battery dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamp bridging VIN and GND in constant-current LED driver PCBs. Use Value: Withstands ISO 7637-2 Pulse 5a (load dump) up to 400W without degradation, maintaining light output stability. | Use Scenario: Input rail protection in universal AC/DC adapters used in medical or test equipment. IC Role / Device Role / Timing Role: First-line defense against mains-borne surges entering via barrel jack or USB-PD interface. Use Value: UL 94V-0 package prevents flame propagation during catastrophic surge events, meeting IEC 62368-1 safety 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 |
|---|---|---|---|
| SMBJ20CA (Bourns) | Same DO-214AA package; 400W PPPM; VBR = 22.2–24.6V; VC = 32.4V @ 12.3A | Slightly higher clamping voltage (+0.5V); identical ISO 7637-2 coverage | Select when existing layout uses SMB footprint and mechanical clearance allows larger body length |
| 1.5KE20CA (ON Semiconductor) | Through-hole DO-15; 1500W PPPM; VBR = 22.2–24.6V; VC = 32.4V @ 46.3A | Higher power rating but incompatible SMT assembly; requires PCB redesign | Choose only for legacy through-hole designs requiring >400W surge margin and manual assembly |
Compared with SMBJ20CA and 1.5KE20CA, the P4SMA20C offers optimal balance of SMT manufacturability, 400W surge capacity, and tight 22.0–24.2V VBR tolerance - making it preferred for space-constrained, high-volume automotive and industrial DC/DC modules where DO-214AC footprint and thermal performance are prioritized.
Availability
P4SMA20C is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and automotive lighting modules requiring stable component supply across extended production lifecycles.
Supply support for P4SMA20C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The P4SMA20C belongs to TSC's P4SMAx series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in harsh environments where ISO 7637-2 compliance, low leakage, and stable clamping are mandatory.
FAQ
What is the polarity configuration of the P4SMA20C?
The P4SMA20C is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Its DO-214AC package includes a cathode band for reference only; the device functions identically regardless of orientation across the protected line. This eliminates polarity installation errors in AC-coupled or floating DC applications and is confirmed by its "C" suffix designation per TSC documentation.
Does the P4SMA20C meet automotive transient immunity standards?
Yes, the P4SMA20C meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, which cover common automotive electrical disturbances including load dump, supply interruption, and coupled transients. Its 400W peak pulse power rating and 31.9V clamping voltage at 13.0A (10/1000μs) ensure robust protection for 12V and 24V vehicle subsystems - verified in TSC's official S2102 datasheet.
What is the maximum junction temperature rating for the P4SMA20C?
The P4SMA20C has a maximum junction temperature (TJ) of +150°C and a storage temperature range of –55°C to +150°C. This wide thermal envelope supports operation adjacent to power semiconductors and in under-hood automotive environments. Derating of peak pulse power begins above TA = 25°C per Figure 2 in the TSC datasheet, maintaining reliability across industrial temperature grades.
How does the P4SMA20C compare to unidirectional TVS diodes like P4SMA20A?
The P4SMA20C is bidirectional, while P4SMA20A is unidirectional. Both share identical VWM (17.1V), VBR (22.0–24.2V), and PPPM (400W), but P4SMA20C clamps transients of either polarity, whereas P4SMA20A only protects against reverse-polarity surges. Use P4SMA20C for AC lines, differential signals, or floating rails; use P4SMA20A where forward conduction must be preserved.
Is the P4SMA20C halogen-free and RoHS compliant?
Yes, the P4SMA20C is halogen-free per IEC 61249-2-21 and RoHS compliant, as explicitly stated in the TSC S2102 datasheet. Its molding compound contains no brominated or chlorinated flame retardants, and lead content complies with EU RoHS Directive 2011/65/EU - critical for export to EU, China, and other regulated markets.
P4SMA20C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 14A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA20C FAQ
1.How can I place an order for P4SMA20C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA20C 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 P4SMA20C reliable?
The price and inventory of P4SMA20C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA20C is usually 5 days.
3.What payment methods are accepted for P4SMA20C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA20C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA20C?
P4SMA20C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA20C 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 P4SMA20C?
For technical support, including P4SMA20C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA20C requirements.
6.How does Aetrix verify that P4SMA20C is sourced from the original manufacturer or authorized distributors?
All P4SMA20C 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 P4SMA20C meets industry standards.
7.What is the process for return or replacement of P4SMA20C?
All P4SMA20C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA20C, 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 P4SMA20C part is unused and in its original packaging.
Return procedure for P4SMA20C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA20C 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
