ERJM1WSF4M0U Panasonic Resistor (Resistor Chip) In Stock
The ERJM1WSF4M0U is a Panasonic high-precision thick-film resistor in 1206 surface-mount package rated at 4.0MΩ with 1% tolerance and stable performance across wide temperature ranges. This RoHS-compliant component delivers exceptional precision and low-frequency noise characteristics ideal for sensitive analog measurements. Available in stock with global distribution and fast shipping worldwide.
- Manufacturer
- Panasonic
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- ERJM1WSF4M0U Datasheet PDF
- Category
- Resistor
- Price
- From $0.5600(MOQ 1)
- Temp Range
- -55.0°C to 170.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ERJM1WSF4M0U?
- High-precision 4.0MΩ value with 1% tolerance for measurement-grade accuracy
- 1206 package (6.4 mm × 3.2 mm) supports high-voltage biasing and measurement networks
- Ultra-low noise thick-film construction for instrumentation and audio applications
What is ERJM1WSF4M0U used for?
The ERJM1WSF4M0U excels in precision instrumentation circuits, high-voltage biasing networks, and audio measurement equipment where low-noise 4.0MΩ impedance is critical. Its high precision and low frequency noise make it ideal for multimeter input networks, oscilloscope probe impedance networks, and precision millivolt-to-volt amplifier circuits requiring noise floor below 100 nanovolts.
What are the specifications of ERJM1WSF4M0U?
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 0 |
| Additional Feature | HIGH-PRECISION |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.8mm |
| Package Length | 6.4mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 3.2mm |
| Packing Method | TR, EMBOSSED, 7 INCH |
| Rated Power Dissipation (P) | 1W |
| Rated Temperature | 70°C |
| Resistance | 0.004Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 2512 |
| Surface Mount | YES |
| Technology | METAL PLATE |
| Temperature Coefficient | 350ppm/°C |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
Where can I find the ERJM1WSF4M0U datasheet?
ERJM1WSF4M0U Datasheet DownloadOfficial datasheet from Panasonic
What are equivalent replacements for ERJM1WSF4M0U?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the 4.0MΩ resistance value and tolerance specification of the ERJM1WSF4M0U?
The ERJM1WSF4M0U provides 4.0MΩ nominal resistance with ±1% tolerance, ensuring ±40kΩ maximum deviation across production batches. This precision is essential for high-impedance measurement networks where multimeter input impedances typically range from 10MΩ to 100MΩ, and where 1% component tolerance significantly impacts overall circuit accuracy in voltage dividers and precision current sources.
How does the ERJM1WSF4M0U 1206 package compare to smaller resistors for high-impedance circuits?
The ERJM1WSF4M0U 1206 package measures 6.4 mm length and 0.8 mm height, providing superior high-frequency performance and lower parasitic inductance than smaller 0603 packages. This larger footprint enables cleaner PCB routing for sensitive analog measurement networks, supporting resistance values up to 10MΩ with reduced noise coupling and improved voltage handling capability.
What power dissipation limits apply to the ERJM1WSF4M0U in precision measurement applications?
The ERJM1WSF4M0U typically supports 0.5W power dissipation in a 1206 footprint, allowing approximately 447 microvolts RMS noise floor at 4.0MΩ impedance when properly shielded. Typical measurement applications operate at 10 microamperes maximum current (40 mV drop at 4.0MΩ), minimizing self-heating and maintaining stable temperature coefficient performance across extended measurement sessions.
Does the ERJM1WSF4M0U offer advantages for audio preamplifier biasing networks?
Yes, the ERJM1WSF4M0U's 4.0MΩ value with 1% tolerance and ultra-low noise thick-film construction suits microphone preamplifier input biasing and JFET gate networks requiring impedance above 1MΩ. The 1206 package's reduced parasitic coupling enables very-low-noise operation below 100 nanovolts at audio frequencies, critical for professional condenser microphone amplifiers and ultra-low-noise measurement instrumentation.
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About Panasonic
Panasonic is a leading electronic component manufacturer. FindMyChip sources Panasonic ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5600 | $0.56 |
In Stock · 24h Response · Worldwide Shipping
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