3314J-1-253E Bourns Variable Resistor (Other) In Stock
Bourns 3314J-1-253E is a 25 kΩ single-turn SMD trimmer potentiometer with vertical screw actuator, offering precise resistance adjustment in a compact rectangular surface-mount package for PCB-level calibration and fine-tuning of analog circuits.
- Manufacturer
- Bourns
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- 3314J-1-253E Datasheet PDF
- Category
- Variable Resistor
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 25 kΩ resistance value covers common op-amp and sensor bias trimming requirements
- Vertical screw actuator enables precise single-turn adjustment with standard flat-head screwdriver
- Surface-mount construction allows automated PCB assembly alongside other SMD components
- Single-gang single-turn design simplifies calibration procedures in production and field service
- REACH and RoHS compliant construction for use in environmentally regulated electronic products
Applications
The 3314J-1-253E trimmer potentiometer is used in analog calibration circuits for sensors, amplifiers, and voltage reference networks where a precise adjustable resistance between 0 Ω and 25 kΩ is needed to fine-tune offset voltages, gain settings, or threshold levels. Its vertical screw actuator makes it suitable for PCB-level factory calibration of industrial instrumentation, medical devices, and audio equipment where adjustments are made during manufacturing and then locked in place. The SMD package integrates seamlessly into mixed-technology boards alongside standard surface-mount components.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 9Weeks |
| YTEOL | 7 |
| Actuator Orientation | VERTICAL |
| Actuator Type | SCREW |
| Construction | Rectangular |
| Ganging Number | 1 |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Number of Turns | 1 |
| Package Height | 2.55mm |
| Package Length | 4.5mm |
| Package Style | SMT |
| Package Width | 4.5mm |
| Packing Method | TR, 7 Inch |
| Rated Power Dissipation (P) | 0.25W |
| Rated Temperature | 70°C |
| Reference Standard | AEC-Q200 |
| Resistance | 25000Ω |
| Resistance Law | LINEAR |
| Resistor Type | TRIMMER |
| Rotational Angle | 210deg |
| Size Code | 1818 |
| Surface Mount | YES |
| Technology | CERMET |
| Temperature Coefficient | 100ppm/°C |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Shape | WRAPAROUND |
| Tolerance | 20% |
| Working Voltage | 300V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.40.80.50 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 3314J-1-253E:
suggested
suggested
Frequently Asked Questions
How many turns does it take to adjust the 3314J-1-253E from minimum to maximum resistance, and how fine is each adjustment increment?
The 3314J-1-253E is a single-turn trimmer potentiometer, meaning one full 300-degree rotation of the screw actuator sweeps from 0 Ω to the full 25 kΩ maximum resistance. At 300 degrees of total travel, each degree of rotation adjusts the resistance by approximately 83 Ω, giving reasonable adjustment resolution for analog offset and threshold trimming. For finer resolution across the same resistance range, a multi-turn trimmer such as a 25-turn equivalent would provide about 83 Ω per full revolution.
In an op-amp offset nulling circuit, how does the 3314J-1-253E 25 kΩ range compare to the typical offset null pin requirements of standard amplifiers?
Many general-purpose op-amps such as the LM741 or TL071 require an offset null potentiometer of 10 kΩ to 50 kΩ connected to dedicated null pins, placing the 3314J-1-253E 25 kΩ squarely within the recommended range. Using the 3314J-1-253E in a wiper-connected voltage divider between the null pins allows offset voltages of ±5 mV to ±15 mV typical to be nulled to below 0.1 mV, improving DC accuracy of precision measurement amplifier circuits to the microvolt level.
For a PCB-level factory calibration workflow, how durable is the 3314J-1-253E screw actuator against repeated adjustment cycles?
Bourns 3314 series trimmers are typically rated for a minimum of 200 adjustment cycles before mechanical wear causes significant resistance tracking error or contact resistance increase above 100 Ω. For factory calibration where each unit is adjusted once or twice during manufacture, this lifespan is more than adequate. If field re-calibration is expected multiple times over a product's lifetime, specifying a higher-cycle-rated trimmer or switching to a sealed cermet trimmer with 500-cycle or greater rating would be more appropriate.
How should the 3314J-1-253E be soldered on a reflow assembly line, and what thermal profile risks apply to trimmer potentiometers?
The 3314J-1-253E SMD package is suitable for standard lead-free solder reflow processes with a peak temperature of 260°C and a time above 217°C of no more than 60 seconds, per typical J-STD-020 classification for surface-mount components. Exceeding the recommended thermal profile risks deformation of the plastic actuator housing and internal resistive element, potentially shifting the as-adjusted resistance setting. Bourns recommends performing the calibration adjustment after reflow soldering has cooled to room temperature to avoid introducing thermal drift errors into the calibrated resistance value.
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