TPD1E01B04DPYR - 0.18pF ESD Diode USB Type-C | Texas Instruments
MPN: TPD1E01B04DPYR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.05 | $0.05 |
| 10 | $0.04 | $0.40 |
| 100 | $0.032 | $3.20 |
| 500 | $0.026 | $13.00 |
| 1,000 | $0.021 | $21.00 |
TPD1E01B04DPYR Overview
An ESD protection diode, also called a TVS (transient voltage suppressor) diode or ESD suppressor, is a semiconductor device that clamps high-voltage electrostatic discharge transients before they reach sensitive ICs. In the system hierarchy it sits at the board level as a passive-class protection component within the broader circuit-protection family, complementing fuses, varistors, and surge protectors. Because it is placed directly on high-speed signal lines, its line-to-line capacitance directly determines how much signal integrity degradation the protected interface suffers.
Key differentiating specifications of the TPD1E01B04 are its extremely low 0.18 to 0.20 pF typical IO capacitance, which preserves eye diagrams on interfaces running up to 20 Gbps; its low dynamic resistance (R_DYN), which yields a low clamping voltage during an ESD event; and its bidirectional topology, which allows it to protect lines carrying signals that swing both above and below ground. According to the TI datasheet, the device is rated at the maximum level of the IEC 61000-4-2 international standard (Level 4, ±15 kV air / ±8 kV contact category commonly cited for this class), and DigiKey lists a 15 V clamp voltage with 2.5 A (8/20 us) Ipp.
Architecturally, the TPD1E01B04 uses a deep snapback-free bidirectional TVS structure optimized for sub-0.2 pF loading. This is achieved through a small-die design whose junction geometry minimizes parasitic capacitance while maintaining the current handling needed for repeated ESD strikes. Low dynamic on-resistance means that during a discharge the voltage presented to the protected PHY stays low, reducing the stress on downstream transceiver pins.
Typical applications include USB Type-C and Thunderbolt 3 port protection, SuperSpeed USB 3.x and USB4 differential pairs, HDMI and DisplayPort high-speed lanes, and other high-speed interfaces up to 20 Gbps where lower-capacitance TVS parts would attenuate or distort the signal.
Design consideration: place the DPY package within a few millimeters of the connector pin being protected, with a short, direct low-inductance path to ground; excess trace inductance raises the effective clamping voltage during fast ESD edges.
This page synthesizes verified distributor pricing and stock data, drop-in alternatives from the same X1SON footprint, and practical layout guidance not found in the manufacturer datasheet alone.
Drop-in alternatives for TPD1E01B04DPYR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPD1E01B04DPYR (same form factor and footprint) — differing in Package, Peak Pulse Current (Ipp), Clamping Voltage, ESD Rating, Polarity.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPD1E1B04DPYR
✅ Drop-In📋 Reference alternative (not in catalog)
TPD1E01B04DPYRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPD1E10B06DPYR
✅ Drop-In✓ In Stock
$0.15 / Unit
View Datasheet →TPD1E01B04DPYT
✅ Drop-In✓ In Stock
$0.033 / Unit
View Datasheet →TPD1E01B04DPYR
✅ Drop-In✓ In Stock
$0.021 / Unit
View Datasheet →TPD1E01B04DPYR
✅ Drop-In✓ In Stock
$0.021 / Unit
View Datasheet →TPD1E01B04DPYR Maximum Ratings & Electrical Characteristics
| Product Type | 1-Channel Bidirectional TVS ESD Protection Diode |
| IO Capacitance (Typ) | 0.18 pF (0.18 to 0.20 pF) |
| Reverse Standoff Voltage | 3.6 V |
| ESD Rating | ±15 kV (IEC 61000-4-2 Level 4) |
| Clamping Voltage | 15 V |
| Peak Pulse Current (Ipp) | 2.5 A (8/20 us) |
| Polarity | Bidirectional |
| Target Interface Speed | Up to 20 Gbps |
| Target Applications | USB Type-C, Thunderbolt 3 |
| Package | 2-X1SON (DPY, 0402/DFN1006 footprint) |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Power Line Protection | No (signal line ESD protection) |
TPD1E01B04DPYR Pin Configuration
| Pin 1 | I/O — Input/output line to be protected (connected to signal line at connector) |
| Pin 2 | GND — Ground reference (connect to low-inductance ground plane) |
Typical Applications
TPD1E01B04DPYR is suitable for 6 applications: USB Type-C Port Protection, Thunderbolt 3 Interface Protection, SuperSpeed USB 3.x Differential Pairs, HDMI and DisplayPort Lane Protection, Industrial High-Speed Field Interfaces, Smartphones, Tablets and Wearables.
USB Type-C Port Protection
The TPD1E01B04DPYR was designed specifically for USB Type-C connector protection, where exposed VBUS-adjacent SuperSpeed differential pairs are prime entry points for electrostatic discharge from human contact. Its 0.18 pF typical IO capacitance preserves the eye diagram of USB 3.2 Gen 2 (10 Gbps) and USB4 (20 Gbps) lanes, whereas a 0.5 to 1 pF suppressor would introduce measurable insertion loss and jitter. In a typical implementation, one DPY device is placed on each high-speed line within 2 to 3 mm of the connector pad, with pin 2 tied directly to the ground plane through a short via. The bidirectional topology accommodates the AC-coupled swinging signals of high-speed pairs. During an IEC 61000-4-2 Level 4 contact strike, the low dynamic resistance of the diode clamps the residual voltage at the PHY pins, protecting the transceiver from gate-oxide damage. The trade-off is a 2.5 A (8/20 us) Ipp rating, adequate for ESD but not for cable-surge events, which require a separate TVS on VBUS.
Recommended
Thunderbolt 3 Interface Protection
Thunderbolt 3 links run at up to 40 Gbps over the same USB Type-C connector, placing extreme demands on any component in the signal path. The TPD1E01B04's 0.18 to 0.20 pF typical capacitance, cited by TI as supporting interfaces up to 20 Gbps, keeps total channel insertion loss low enough that system-level compliance with 20 Gbps USB4 and partially loaded Thunderbolt lanes remains achievable. Each bidirectional device protects one line of a differential pair; because capacitance adds symmetrically, both legs of the pair see matched loading, preserving intra-pair skew. Placement should be at the connector side, ahead of AC-coupling capacitors, with a ground via immediately adjacent to pin 2 to minimize the discharge loop inductance. During a Level 4 ESD event, the low R_DYN clamps the transient before it reaches the Thunderbolt retimer or PHY. Designers should validate post-ESD eye diagrams, since even 0.2 pF of extra loading can shift the channel's S-parameters at 20+ GHz frequencies.
Recommended
SuperSpeed USB 3.x Differential Pairs
For USB 3.0/3.1/3.2 SuperSpeed differential pairs (5 to 10 Gbps), the TPD1E01B04DPYR offers an ideal balance of protection and transparency. At 0.18 pF, its capacitive loading contributes roughly an order of magnitude less channel degradation than classic 0.6 to 1 pF suppressors, which matters because USB 3.x compliance testing measures total channel insertion loss and return loss up to the Nyquist frequency. The device is placed on each SS TX/RX line near the connector, downstream of the common-mode choke and upstream of the AC-coupling caps depending on the board topology. Its bidirectional clamping handles negative signal excursions without DC bias concerns. During system-level ESD testing per IEC 61000-4-2 Level 4, the low clamping voltage keeps residual stress on the USB 3.x PHY within safe limits. For systems where connectors are user-accessible and strikes are frequent, combining one TPD1E01B04 per high-speed line with a dedicated VBUS TVS provides complete port protection.
Recommended
HDMI and DisplayPort Lane Protection
HDMI 2.0 and DisplayPort 1.4 differential lanes run at 6 to 12 Gbps per pair, making them nearly as capacitance-sensitive as USB4. The TPD1E01B04DPYR's 0.18 pF capacitance allows one suppressor per TMDS/main lane without violating typical channel-loss budgets, and its small X1SON footprint fits the dense routing region near HDMI and DP receptacles. Each hot-plug-capable line, including the HPD and DDC/aux lines, can carry its own device where surge exposure is higher; for those slower lines the higher-capacitance TPD1E1B04DPYR sibling with 6.3 A surge capability is a better parametric fit on the same footprint. During a Level 4 IEC 61000-4-2 strike at the connector shell or pin, the diode clamps within nanoseconds, protecting the SERDES receiver's input stage. Boards should ground the device pad directly to the connector shield ground domain to keep the discharge path localized and prevent ground bounce from coupling into adjacent lanes.
Recommended
Industrial High-Speed Field Interfaces
Industrial equipment with user-accessible high-speed ports - vision-system cameras, machine-vision frame grabbers, industrial Ethernet with multi-gigabit PHYs, and test-instrument front ends - faces frequent ESD events in harsh floor environments. The TPD1E01B04DPYR protects these lines with a ±15 kV IEC 61000-4-2 Level 4 rating while adding only 0.18 pF of loading, which matters for 10 Gbps industrial Ethernet and camera-link-class serial links where signal integrity margins are already tight. Its X1SON package reflows on standard 0402 pick-and-place equipment, so no special assembly process is required. For lines that also see cable-discharge or surge events beyond 2.5 A, the same-footprint TPD1E1B04DPYR (6.3 A, 8/20 us) provides 2.5x more surge capability at the cost of higher capacitance, so assign it to CC, control, and slower lines while reserving the 01B04 for the fastest pairs. Automotive-adjacent industrial designs may prefer the AEC-Q100-qualified TPD1E01B04DPYRQ1.
Recommended
Smartphones, Tablets and Wearables
In mobile and wearable products, board area is the scarcest resource, and the TPD1E01B04DPYR's 2-pin X1SON package in the 0402/DFN1006 convention occupies minimal PCB area while providing ±15 kV ESD protection on external interfaces such as USB Type-C charge/data ports and high-speed display serial links. Its 0.18 pF capacitance is critical for the multi-gigabit MIPI-derived display and camera serial links in smartphones, where even fractions of a picofarad per lane affect the equalization budget of the serializer. The device's bidirectional nature suits AC-coupled signal lines without requiring polarity decisions during routing. Low profile suits thin stack-ups common in wearables. Because ESD strikes at handheld connectors are routine, the low clamping voltage from the low R_DYN characteristic reduces latent-damage failure rates in the field, improving long-term reliability. Volume pricing near $0.02 (LCSC, as of 2026-10-21) makes per-line protection affordable even in BOM-cost-sensitive consumer designs.
Recommended
Recommended Products Summary
Engineering reference data for TPD1E01B04DPYR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPD1E1B04DPYR | TPD1E01B04DPYRQ1 | TPD1E10B06DPYR | TPD1E01B04DPYT |
|---|---|---|---|---|---|
| Package | 2-X1SON (DPY, 0402 footprint) | 2-X1SON (DPY) - same | 2-X1SON (DPY) - same | 2-X1SON (DPY, 0402) - same | 2-X1SON (DPY) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Automotive Grade (AEC-Q100) | No | No | Yes (Q1) | No | No |
| Target Interface | USB Type-C / Thunderbolt 3, up to 20 Gbps | Lower-speed / higher-surge lines | USB Type-C / Thunderbolt 3 (automotive) | General-purpose ESD lines | USB Type-C / Thunderbolt 3 (same) |
Key Differentiators
- Ultra-low capacitance for 20 Gbps interfaces (vs TPD1E1B04DPYR)
- Trade-off: lower surge capability (vs TPD1E1B04DPYR)
- Commercial-grade cost advantage over the automotive variant (vs TPD1E01B04DPYRQ1)
Design Notes
Place the TPD1E01B04DPYR as close to the USB Type-C or Thunderbolt connector as physically possible - ideally within 2-3 mm of the protected pin. Route pin 1 directly to the signal line with no stubs, and connect pin 2 to the ground plane via at least one ground via placed immediately adjacent to the pad. Every nanohenry of series inductance between the strike point and the diode adds to the effective clamping voltage during the ~1 ns ESD edge (Estimated: V = L * di/dt; 5 nH with a 5 A/ns edge adds ~25 V of overshoot), which can defeat an otherwise adequate suppressor.
Although 0.18 pF is extremely low, it is not zero. On 20 Gbps links, account for the device capacitance plus pad and trace parasitics in the total channel insertion-loss budget before finalizing the layout. Run post-layout S-parameter extraction including the ESD footprint, and verify the eye mask at the receiver with the suppressor populated. Keeping the pad geometry small (matching the DPY land pattern exactly, without enlarging pads) minimizes the added parasitic capacitance beyond the die's 0.18 pF.
Do not use the TPD1E01B04 on VBUS or any line carrying surge energy beyond its 2.5 A (8/20 us) Ipp rating - it is an ESD device, not a surge protector; cable-surge events on USB Type-C VBUS require a dedicated higher-power TVS. Also verify the package suffix when ordering: the TPD1E01B04 family comes in 0402 and 0201 options, and the DPY suffix is the 2-X1SON (0402-footprint) version. Substituting the 0201 variant requires a different land pattern.
Compliance Information
Compliance details were not present in the provided verified data. TI ESD products of this class are typically RoHS compliant, but per policy this must be confirmed on the TI product page before publication. The AEC-Q100-qualified variant is TPD1E01B04DPYRQ1; the standard DPYR is not automotive qualified.
