SCMM2512S2-0M80F - 0.8 mOhm 2W Current Sense Resistor | Cyntec
MPN: SCMM2512S2-0M80F ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.49 | $0.49 |
| 10 | $0.42 | $4.20 |
| 100 | $0.31 | $31.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
| 4,000 | $0.15 | $600.00 |
SCMM2512S2-0M80F Overview
A current-sense resistor is a low-ohm precision resistor placed in series with a load so that the voltage drop across it is proportional to the load current. This voltage drop is then amplified by an op-amp, current-sense amplifier, or ADC channel to implement closed-loop control, telemetry, or protection. Current-sense resistors sit in the signal-chain hierarchy as: current-sense resistor -> passive component -> resistor -> chip resistor -> SMD resistor. They are preferred over Hall-effect sensors and current transformers when accuracy, bandwidth, and cost are the primary design drivers.
Key features of the SCMM2512S2-0M80F include 0.8 milliohm (1% tolerance), 2 W continuous power rating, a metal-film resistive element, and pulse-withstanding construction. Its 2512 footprint provides a large solder-pad area for heat spreading, while the low resistance value minimizes both I2R conduction loss and the insertion voltage burden in the load path. Compared with sense resistors above 5 milliohm, a 0.8 milliohm part reduces wasted power by more than 6x at the same load current.
From a technical perspective, the SCMM2512S2 series uses Cyntec's metal-film process on a ceramic substrate, providing a typical TCR of ±100 ppm/°C or better and an operating temperature range that supports automotive underhood and industrial environments. The low-ohm metallization is tuned to give low thermal EMF against copper pads, which keeps measurement error below 1% in typical 4-wire Kelvin layouts.
Typical applications for the SCMM2512S2-0M80F include DC-DC converter output current feedback, battery-pack charge/discharge monitoring in BMS designs, motor-control current sensing in industrial drives, USB-PD and high-current Type-C ports, server and telecom 12 V/48 V rail monitoring, and automotive ECU power monitoring. Designers choose it when they need a low-ohm, high-power, pulse-tolerant shunt in a standardized 2512 land pattern.
When laying out this part, use a Kelvin (4-wire) connection to the sense pads so that the high-current path and the voltage-sensing path are physically separated. Place the sense traces close together and away from switching nodes to avoid capacitive coupling; add a small RC filter at the amplifier input to reject high-frequency noise. Reserve at least 1 oz copper on both top and inner layers under the pads to keep the resistor temperature rise within the 2 W rating.
This page consolidates distributor pricing for the SCMM2512S2-0M80F, drop-in and parametric equivalents, and practical layout notes that are not reproduced in the Cyntec datasheet itself.
Drop-in alternatives for SCMM2512S2-0M80F — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SCMM2512S2-0M80F
✅ Drop-In✓ In Stock
$0.15 / Unit
View Datasheet →SCMM2512S2-1M00F
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
WSLP2512R8000FEA
✅ Drop-In📋 Reference alternative (not in catalog)
PE2512FKE7W0R82E
✅ Drop-In📋 Reference alternative (not in catalog)
PMR2512-0M80F
✅ Drop-In📋 Reference alternative (not in catalog)
ERJ-M1WTF8M0U
✅ Drop-In📋 Reference alternative (not in catalog)
SCMM2512S2-0M80F Maximum Ratings & Electrical Characteristics
| Resistance | 0.8 milliohm (mOhm) |
| Resistance Tolerance | ±1% |
| Power Rating | 2 W |
| Package / Case | 2512 (6332 Metric) |
| Footprint Dimensions | 6.35 mm x 3.20 mm |
| Mounting Type | Surface Mount (SMT) |
| Resistor Type | Current Sense, Pulse Withstanding |
| Element Material | Metal Film |
| Lead-Free | Yes (per datasheet family description) |
| Halogen Free | Yes (per datasheet family description) |
| RoHS Status | Compliant |
| Packaging | Tape & Reel |
SCMM2512S2-0M80F Pin Configuration
| Pin 1 | Termination A — Solder pad (end cap), connected to high-current path |
| Pin 2 | Termination B — Solder pad (end cap), connected to high-current path; symmetric/non-polarized |
Typical Applications
SCMM2512S2-0M80F is suitable for 6 applications: DC-DC Converter Output Current Feedback, Battery Management System (BMS) Charge/Discharge Monitoring, Motor Control Current Sensing (BLDC / PMSM), USB-PD / Type-C High-Current Port Monitoring, Server / Telecom 12 V and 48 V Rail Monitoring, Automotive ECU Power Monitoring.
DC-DC Converter Output Current Feedback
The SCMM2512S2-0M80F suits DC-DC converter output-current feedback where the controller needs an accurate ground-side or high-side sense voltage. At a 30 A load, the 0.8 mΩ value produces a 24 mV sense signal, well above amplifier offset noise and below the common-mode range of typical current-sense amplifiers. The 2 W power rating gives 6x margin over the 0.72 W actually dissipated at 30 A continuous, with the 2512 footprint spreading heat into the PCB copper for sustained operation. Place the part on the source side of the inductor with a 4-wire Kelvin connection to the sense amplifier input pads to reject board-trace resistance.
Recommended
Battery Management System (BMS) Charge/Discharge Monitoring
In lithium-ion battery-pack BMS designs, the SCMM2512S2-0M80F sits in series with the pack current path to provide Coulomb-counting telemetry. At 50 A charge current the part dissipates only 2.0 W, which matches its continuous rating and keeps the sense voltage at 40 mV - small enough to avoid disturbing cell balancing but large enough for the BMS AFE to resolve. The metal-film element's low thermal EMF against copper pads preserves 1% measurement accuracy across -20°C to +60°C pack temperatures typical in EV and e-mobility applications. Use two sense resistors in parallel for high-current packs above 80 A.
Recommended
Motor Control Current Sensing (BLDC / PMSM)
The SCMM2512S2-0M80F is widely used on the low-side of three-phase BLDC/PMSM motor drives for cycle-by-cycle current control. The 0.8 mΩ resistance keeps the on-state conduction loss low enough that 30 A continuous phase currents produce only 0.72 W of waste heat per phase. Pulse-withstanding construction handles the high di/dt events during PWM switching and the inrush when the motor starts under load. Use a low-inductance layout and keep the sense traces short to avoid ringing that would corrupt the current-loop feedback signal to the FOC controller.
Recommended
USB-PD / Type-C High-Current Port Monitoring
USB-PD 3.1 Extended Power Range (EPR) supplies up to 28 V at 5 A, so a 0.8 mΩ shunt such as the SCMM2512S2-0M80F is appropriate for VBUS current telemetry. At 5 A the dissipation is only 0.02 W, leaving ample margin for transient peaks during device attach/detach and fast role swaps. The 2512 footprint fits standard Type-C PCB layouts and is compatible with downstream PD controllers. Place the shunt on the source side of the VBUS switch to monitor the actual delivered current, with a sense amplifier providing gain for the PD controller's ADC input.
Recommended
Server / Telecom 12 V and 48 V Rail Monitoring
In server and telecom power-supply designs, the SCMM2512S2-0M80F monitors 12 V or 48 V distribution rails for telemetry, fault detection, and dynamic load balancing. At a typical 20 A server current the part dissipates 0.32 W, keeping the board temperature rise well within the 2 W rating. The metal-film element's stability over time ensures the telemetry calibration holds for the 5-7 year service life of typical server SKUs. Mount the resistor near the PSU output connector with a Kelvin connection to the monitoring ASIC's differential sense inputs.
Recommended
Automotive ECU Power Monitoring
In 12 V automotive ECUs the SCMM2512S2-0M80F measures load current for diagnostic feedback, load-dump protection, and dark-current measurement during key-off. The metal-film construction gives better pulse tolerance than metal-strip alternatives, which is important for the 100 V transient events defined by ISO 7637-2. The 2512 footprint is widely accepted by automotive PCB designers and is compatible with AEC-Q200 qualified equivalents when full automotive compliance is required. Place the part close to the ECU power input with TVS diodes to clamp transient energy before it reaches downstream circuits.
Recommended
Recommended Products Summary
Engineering reference data for SCMM2512S2-0M80F — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SCMM2512S2-1M00F | WSLP2512R8000FEA | PE2512FKE7W0R82E | PMR2512-0M80F | ERJ-M1WTF8M0U |
|---|---|---|---|---|---|---|
| Brand | Cyntec (Delta Electronics/Cyntec) | Cyntec | Vishay Intertechnology | Yageo | ROHM Semiconductor | Panasonic |
| Package | 2512 (6332 Metric) | 2512 (6332 Metric) - same | 2512 (6332 Metric) - same | 2512 (6332 Metric) - same | 2512 (6332 Metric) - same | 2512 (6332 Metric) - same |
| Resistance | 0.8 mΩ | 1.0 mΩ | 0.8 mΩ | 0.82 mΩ | 0.8 mΩ | 0.8 mΩ |
| Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% | ±1% |
| Power Rating | 2 W | 2 W | 2 W | 2 W | 2 W | 2 W |
| Resistor Element | Metal Film | Metal Film | Metal Strip | Metal Foil | Metal Strip | Metal Cloth |
| Pulse Withstanding | Yes (per family datasheet) | Yes | Yes | Yes | Yes | Limited |
| Approx. Unit Price @ 1000 pcs (as of 2026-10-10) | $0.19 | $0.18 (est.) | $0.45 (est.) | $0.12 (est.) | $0.30 (est.) | $0.40 (est.) |
Key Differentiators
- Same-footprint upgrade path within the Cyntec SCMM2512S2 family (vs SCMM2512S2-1M00F)
- Metal-film construction vs metal-strip in competing parts (vs WSLP2512R8000FEA)
- Cost-competitive vs Vishay/ROHM branded alternatives (vs WSLP2512R8000FEA)
Design Notes
Use a 4-wire Kelvin connection for the SCMM2512S2-0M80F: route the high-current path through the two end terminations, but bring the voltage-sense traces from small dedicated Kelvin pads that connect inside the solder fillet. This eliminates the parasitic resistance of the PCB traces and solder joints from the measurement, which is critical at 0.8 mΩ where every milliohm of trace resistance is 0.125% of the sense signal. Standard IPC-7351 2512 land pattern with 0.5 mm pad overhang is recommended.
Estimated: at 50 A continuous load the SCMM2512S2-0M80F dissipates 2.0 W (I²R), which is exactly its continuous rating. To stay within the rating at this load, the 2512 pads must be soldered to a copper pour of at least 1 oz copper covering a 25 mm² area on top and inner layers. Without this copper spreading, the junction temperature can exceed 155°C and trigger solder-joint failure or resistance drift. For pulsed loads above 50 A, derate using the datasheet pulse curve and confirm with thermal imaging on a prototype.
Route the sense-amplifier traces as a tightly coupled differential pair, keep them short, and place a small RC filter (typically 100 Ω + 100 nF) at the amplifier input to reject high-frequency common-mode noise from nearby switching nodes. The SCMM2512S2-0M80F itself has very low self-inductance, but the PCB traces and pad geometry can add several nH - significant for the kHz-to-MHz edge rates of modern power converters. Place the resistor at least 5 mm away from any switching-node switching edges to minimize capacitive coupling.
Common pitfall: designers sometimes parallel two 1.6 mΩ resistors to emulate a 0.8 mΩ shunt. The SCMM2512S2-0M80F gives a more accurate, smaller-footprint solution with matched thermal coupling between the two halves. Another pitfall: forgetting that 2512 resistors are non-polarized but the Kelvin connection is sensitive to trace symmetry - asymmetric Kelvin traces introduce measurement error equal to half the trace-resistance mismatch. Use symmetric via placement and trace widths on both sides of the resistor.
Place the SCMM2512S2-0M80F as close as possible to the controller or current-sense amplifier to minimize trace length, but keep it away from heat-generating components such as MOSFETs, transformers, and inductors. Maintain at least 3 mm clearance from tall components to avoid shadowing during reflow, and avoid placing it directly under tall connector pins that may cause mechanical stress on the solder joints during insertion. For vibration-prone automotive applications, add under-fill or corner staking glue dots at the resistor ends.
Compliance Information
RoHS compliance and lead-free/halogen-free status confirmed per Cyntec SCMM2512S2 family datasheet description. REACH SVHC and conflict-minerals documentation should be requested from Cyntec for full regulatory traceability. AEC-Q100 not applicable (passive component); for AEC-Q200 automotive-grade equivalents, use AEC-Q200 qualified parts from the same family or from suppliers such as Vishay or Panasonic.
