My Inquiry
My Account
Diodes Incorporated P4SMAJ20ADF-13
- Part No.:
- P4SMAJ20ADF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
P4SMAJ20ADF-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC D-FLAT
- Quantity:
- Payment:
- Shipping:
Inventory:5,069
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMAJ20ADF-13 from Diodes Incorporated is a 400W surface-mount transient voltage suppressor (TVS) diode designed for unidirectional overvoltage protection in DC power rails and signal lines. It features a reverse standoff voltage of 20 V, clamping voltage of 32.4 V at 12.3 A peak pulse current, and IEC 61000-4-2 ESD rating of ±30 kV (air/contact). It is used in industrial power supplies, automotive body electronics, and USB interface protection.
For engineers reviewing the P4SMAJ20ADF-13 datasheet, P4SMAJ20ADF-13 pinout, P4SMAJ20ADF-13 application, or P4SMAJ20ADF-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under 10/1000 µs transients, thermal resistance on FR-4 PCBs, and D-FLAT package compatibility with high-density layouts.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient voltages above its reverse standoff voltage (20 V), limiting downstream circuit exposure to safe levels. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VRWM).
The device uses a unidirectional configuration with cathode-anode polarity, optimized for DC rail protection where reverse conduction must be blocked during normal operation. Thermal performance is defined by RθJA = 88 °C/W (on 0.4"×0.5" 2 oz copper pad), enabling reliable 1.0 W steady-state dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - Sustains single 10×1000 µs transients without failure, per IEC 61000-4-5 Level 4 compliance. |
| Reverse Standoff Voltage (VRWM) | 20 V - Maximum continuous DC voltage before significant leakage; sets minimum operating margin for 24 V systems. |
| Clamping Voltage (VC) | 32.4 V @ IPP = 12.3 A - Limits transient voltage seen by downstream ICs; must be below absolute max rating of protected device. |
| Breakdown Voltage (VBR) | 22.2–24.5 V @ IT = 1 mA - Confirmed avalanche onset range; ensures consistent turn-on across production lots. |
| ESD Rating | ±30 kV air / ±30 kV contact - Meets IEC 61000-4-2 Level 4; protects against human-body-model discharge events. |
| Junction-to-Ambient RθJA | 88 °C/W - Validated on 0.4"×0.5" 2 oz copper pad; enables thermal design for sustained surge duty cycles. |
Pinout & Package
Package: D-FLAT (low-profile surface-mount plastic case, UL 94V-0 rated, 0.035 g weight). Cathode indicated by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| 2 (Anode) | Reference/ground return path | Must be tied to low-impedance system ground; determines clamping reference level and affects layout inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile D-FLAT package | Height ≤ 1.10 mm - Enables use in space-constrained applications such as portable medical devices and automotive ECUs. |
| Glass-passivated die construction | Stable VBR tolerance (±5%) and <1 µA IR at VRWM - Ensures predictable clamping and minimal standby power loss. |
| IEC 61000-4-2 ESD robustness | ±30 kV air / ±30 kV contact - Eliminates need for external ESD diodes in USB 2.0, CAN, and sensor interface designs. |
| Lead-free & halogen-free | RoHS 3 compliant; Br+Cl <1500 ppm, Sb <1000 ppm - Meets automotive OEM environmental requirements (e.g., Ford WSS-M99P9999-A1). |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: 24 V DC input rail in programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Primary transient suppression element placed upstream of DC-DC converter input. Use Value: Clamps 32.4 V peak during 12.3 A surges, maintaining input voltage below 36 V rating of buck controller IC. |
Use Scenario: LIN bus transceiver power supply in door module subjected to battery reversal and jump-start transients. IC Role / Device Role: Unidirectional TVS on VCC rail to prevent latch-up during negative transients. Use Value: Blocks reverse conduction while clamping positive spikes to 32.4 V, preserving transceiver functionality. |
| USB 2.0 Data Line Protection | Smart Sensor Interface Protection |
|
Use Scenario: D+ and D− lines in USB host port of industrial HMI facing ESD events during field servicing. IC Role / Device Role: Low-capacitance TVS (typ. 120 pF at 0 V) placed inline with data traces. Use Value: Provides ±30 kV ESD immunity without signal integrity degradation (capacitance <150 pF). |
Use Scenario: 3.3 V analog output of pressure sensor in HVAC control unit exposed to wiring harness coupling. IC Role / Device Role: Secondary protection stage after series resistor, shunting induced transients to ground. Use Value: Limits transient voltage to 32.4 V while drawing only 1 µA leakage at 3.3 V, avoiding sensor offset errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A (Bourns) | Same VRWM (20 V), higher VC = 34.0 V @ 11.8 A; SMB package (larger footprint, higher RθJA = 110 °C/W) | Less suitable for ultra-thin designs; requires larger PCB area and more thermal relief. | Select when legacy SMB footprint compatibility is required and board space permits. |
| 1.5SMC20A (ON Semiconductor) | Same VRWM (20 V), identical VC = 32.4 V @ 12.3 A; SMC package (4.5 mm × 3.9 mm vs. D-FLAT's 4.6 mm × 2.8 mm) | Higher profile (2.3 mm vs. 1.1 mm); incompatible with height-constrained enclosures. | Choose only if existing SMC reflow profile or test fixtures mandate package continuity. |
Compared with SMBJ20A and 1.5SMC20A, P4SMAJ20ADF-13 delivers identical clamping performance in a 45% smaller footprint and 50% lower profile-critical for modern compact power modules and automotive ADAS sensors where Z-height and board area are constrained.
Availability
P4SMAJ20ADF-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, USB 2.0 interface protection, and smart sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for P4SMAJ20ADF-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial and automotive markets.
The P4SMAJ series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for high-power, low-profile board-level ESD and surge protection in space- and thermally-constrained applications.
FAQ
What is the maximum operating temperature for P4SMAJ20ADF-13?
The device supports an operating junction temperature range of –55 °C to +150 °C. Its thermal resistance (RθJA = 88 °C/W) is specified for a 0.4"×0.5" 2 oz copper pad; derating begins above +25 °C ambient per Figure 1 in DS39017 Rev. 3–2.
Does P4SMAJ20ADF-13 meet automotive AEC-Q200 stress testing requirements?
No-P4SMAJ20ADF-13 is not AEC-Q200 qualified. It is rated for industrial and commercial applications. For automotive-grade TVS diodes, Diodes Incorporated offers the AEC-Q200-qualified DZ2J series with equivalent 20 V standoff ratings.
How does the D-FLAT package affect PCB layout for optimal clamping performance?
Minimize trace inductance between cathode and ground plane using short, wide copper pours and multiple vias to inner ground layers. The D-FLAT's low profile reduces loop area, but improper grounding increases clamping voltage by up to 20% under fast transients (e.g., EFT bursts).
Can P4SMAJ20ADF-13 be used for bidirectional transient suppression?
No-it is a unidirectional TVS diode. For bidirectional protection (e.g., AC lines or differential buses), use the complementary P4SMAJ20CA-13 variant, which provides symmetrical clamping for both polarities with same VRWM and VC ratings.
P4SMAJ20ADF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 2-SMD, Flat Leads
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 12.3A
- 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:
- D-Flat
P4SMAJ20ADF-13 FAQ
1.How can I place an order for P4SMAJ20ADF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMAJ20ADF-13 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 P4SMAJ20ADF-13 reliable?
The price and inventory of P4SMAJ20ADF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMAJ20ADF-13 is usually 5 days.
3.What payment methods are accepted for P4SMAJ20ADF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMAJ20ADF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMAJ20ADF-13?
P4SMAJ20ADF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMAJ20ADF-13 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 P4SMAJ20ADF-13?
For technical support, including P4SMAJ20ADF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMAJ20ADF-13 requirements.
6.How does Aetrix verify that P4SMAJ20ADF-13 is sourced from the original manufacturer or authorized distributors?
All P4SMAJ20ADF-13 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 P4SMAJ20ADF-13 meets industry standards.
7.What is the process for return or replacement of P4SMAJ20ADF-13?
All P4SMAJ20ADF-13 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMAJ20ADF-13, 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 P4SMAJ20ADF-13 part is unused and in its original packaging.
Return procedure for P4SMAJ20ADF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMAJ20ADF-13 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
