702 (2N7002) - 60V 115mA N-Channel SOT-23 MOSFET | onsemi
MPN: 702 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1 | $0.10 |
| 10 | $0.07 | $0.70 |
| 100 | $0.04 | $4.00 |
| 500 | $0.03 | $15.00 |
| 1,000 | $0.02 | $20.00 |
Drop-in alternatives for 702 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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2N7002LT1G
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View Datasheet →2N7002L
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View Datasheet →2N7002L
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✅ Drop-In📋 Reference alternative (not in catalog)
702 Maximum Ratings & Electrical Characteristics
| Transistor Type | N-Channel Enhancement Mode MOSFET |
| Marking Code | 702 |
| Base Part Number | 2N7002 / 2N7002L |
| Drain-Source Voltage (VDS) | 60 V |
| Continuous Drain Current (ID) | 115 mA (2N7002L); up to 300 mA for other 2N7002 sources |
| Package | SOT-23 (TO-236AB) |
| Mounting Type | Surface Mount |
| Technology | DMOS / Trench MOSFET |
| Configuration | Single MOSFET |
| RoHS Status | Compliant (lead-free vendor variants) |
| Typical Applications | Low-side switching, level shifting, pulsed amplifiers, drivers |
702 Pin Configuration
| Pin 1 | Gate — Gate terminal - controls channel conduction |
| Pin 2 | Source — Source terminal - reference for gate drive, normally tied to ground in low-side switching |
| Pin 3 | Drain — Drain terminal - connects to load |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
702 is suitable for 6 applications: Low-Side Relay Driving, Microcontroller Level Shifting, LED and Indicator Load Switching, Pulsed Amplifier and Driver Circuits, Small Motor and Buzzer Switching, Electronic Repair and Retrofits.
Low-Side Relay Driving
The 702-marked 2N7002 is a classic low-side relay driver for microcontroller-based systems. Its 60 V drain-source rating comfortably absorbs inductive flyback excursions beyond the coil supply rail (in combination with a clamp diode), and the 115 mA continuous rating of the onsemi 2N7002L covers most small signal relays. The gate is driven directly from a 3.3 V or 5 V GPIO with a series resistor; a 10k gate-to-source pulldown keeps the switch off during reset. Placed between the relay coil's low side and ground, the MOSFET adds no switching noise of its own, unlike a BJT it requires no continuous base current, keeping controller I/O loading minimal. Verify coil current against the datasheet ID rating before finalizing the design.
Recommended
Microcontroller Level Shifting
The 702 / 2N7002 is widely used as a bidirectional I2C and logic level shifter between 3.3 V and 5 V domains. In the standard two-MOSFET bi-directional topology, the 2N7002's gate-threshold voltage (1-2.5 V region per manufacturer datasheets) sits between the two rails, allowing the channel and body diode to pull the line low from either side while pull-up resistors restore the high level. Its small SOT-23 footprint keeps the shifter compact on mixed-voltage boards, and its single-digit-ohm on-resistance at full gate drive gives a strong low level. Because the 2N7002 is second-sourced by onsemi, Vishay, NXP, Taitron, and Central Semiconductor with identical pinout, BOM consolidation is trivial for this application.
Recommended
LED and Indicator Load Switching
Switching LED strings, panel indicators, and backlights is one of the most common uses of the 702-marked 2N7002. Typical indicator currents of 5-20 mA sit far below the 115 mA continuous rating of the onsemi 2N7002L, giving wide margin, and the 60 V rating covers even 48 V industrial indicator rails with headroom. The device is placed between the LED string's cathode return and ground with a small series gate resistor from the controller. Its enhancement-mode gate draws zero DC gate current, so PWM dimming from a microcontroller timer output is efficient and jitter-free. Estimated dissipation at 20 mA with a few ohms of RDS(on) is under 5 mW, eliminating thermal concerns entirely in indicator duty.
Recommended
Pulsed Amplifier and Driver Circuits
The Central Semiconductor 2N7002 datasheet describes the type as designed for high-speed pulsed amplifier and driver applications, and the 702-marked device inherits this role. The vertical DMOS / trench structure gives fast switching transitions with low gate charge, making the part suitable for gating small signals, driving piezo buzzers, and pulsing small lamps or laser-pointer diode loads. In pulsed duty the IDM pulsed-current capability (per the specific vendor datasheet) exceeds the DC rating, allowing short overloads. Designers should keep gate drive impedance low to minimize switching time, and verify duty-cycle-limited average power against the SOT-23 dissipation limit. For repair and prototyping, the universal 2N7002 pinout makes substitution from any second source immediate.
Recommended
Small Motor and Buzzer Switching
The 702 / 2N7002 drives small DC brush motors, vibration motors, and magnetic buzzers in portable and IoT devices. Its 60 V rating absorbs the inductive kick from motor windings when paired with a flyback diode, and the 115 mA onsemi rating suits coin vibration motors and small buzzer coils that typically draw 30-100 mA. Because it is an enhancement-mode MOSFET, no gate drive current is wasted, extending battery life in wearables compared with BJT drivers. Place the MOSFET low-side with a 100k gate pulldown to guarantee off-state during controller boot. Verify stall current - not running current - against the datasheet ID rating, since motor stall can multiply current draw several-fold at startup.
Recommended
Electronic Repair and Retrofits
For technicians repairing consumer electronics, the 702-marked SOT-23 MOSFET is one of the most frequently replaced SMD components, found in power-management sections, charge-pump switches, and button interfacing of TVs, chargers, and small appliances. Because the 702 code maps to the universally second-sourced 2N7002, a failed part can be replaced with any branded 2N7002 - onsemi 2N7002L, Vishay 2N7002, NXP/Nexperia 2N7002, Taitron, or Central Semiconductor - with no footprint or pinout changes. The repair-technique consideration is matching the current rating: if the original board used a 300 mA-class second source, substituting the 115 mA 2N7002L could under-rate the circuit, so check the load current before installing the replacement.
Recommended
Recommended Products Summary
Engineering reference data for 702 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 2N7002L | 2N7002 (Vishay) | 2N7002 (NXP) | 2N7002 (Taitron) |
|---|---|---|---|---|---|
| Package | SOT-23 (TO-236AB) | SOT-23 (TO-236AB) - same | SOT-23 (TO-236AB) - same | SOT-23 (TO-236AB) - same | SOT-23 (TO-236AB) - same |
| Brand | onsemi (702-marked 2N7002L) | onsemi | Vishay Intertechnology | NXP Semiconductors | Taitron |
| Drain-Source Voltage | 60 V | 60 V | 60 V | 60 V | 60 V |
| Continuous Drain Current | 115 mA | 115 mA | ~300 mA class | 300 mA | [DATA_NEEDED] |
| Marking Code | 702 | 702* | [DATA_NEEDED] | [DATA_NEEDED] | 702 |
| Technology | DMOS (onsemi) | DMOS | Vertical D-MOS | Trench MOSFET | DMOS |
| Unit Price (qty 1) | $0.10 (as of 2026-09-13) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Pinout (SOT-23) | 1-Gate, 2-Source, 3-Drain | 1-G, 2-S, 3-D - same | 1-G, 2-S, 3-D - same | 1-G, 2-S, 3-D - same | 1-G, 2-S, 3-D - same |
Key Differentiators
- Universal second-source availability (vs 2N7002 (Vishay))
- 60 V rating in minimal footprint (vs BSS138)
- Higher-current second sources available (vs 2N7002L (onsemi))
Design Notes
The 702 marking is shared across multiple 2N7002 second sources with different continuous current ratings: onsemi 2N7002L is rated 115 mA while Vishay, NXP, and other sources qualify their standard 2N7002 up to approximately 300 mA. When repairing a board or second-sourcing, confirm the load current against the specific vendor datasheet - substituting the 115 mA part into a circuit designed around a 300 mA-class device can cause overheating or failure. The SOT-23 pinout (1-G, 2-S, 3-D) is, however, universal across all sources.
The SOT-23 package dissipates heat primarily through its three pins, so give the drain and source pads adequate copper area on at least one layer to keep junction temperature low. For typical small-signal duty (under 100 mA) a standard 2-layer footprint with 0.5 mm pitch pads is sufficient. Estimated: at 115 mA with single-digit-ohm RDS(on), dissipation stays below 0.15 W, well within SOT-23 limits without thermal vias. Place the gate series resistor close to the gate pin to limit ringing in fast-switching circuits.
When driving inductive loads (relays, motors, buzzers), always fit a flyback clamp diode such as a 1N4148W across the load. Although the 2N7002 has an intrinsic body diode, its avalanche energy rating in small-signal SOT-23 parts is limited, and repetitive inductive kick can degrade it over time. The 60 V drain-source rating gives useful margin above 24 V industrial rails, but repeated unclamped transients can exceed it instantaneously. Add a 10k gate-source pulldown so the MOSFET stays off while the microcontroller pin is high-impedance during reset or programming.
Compliance Information
onsemi 2N7002L L-suffix designates lead-free finish; current-production 2N7002 variants are RoHS compliant per vendor product pages. REACH and halogen-free status not stated in the retrieved data.
