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P1170.183NLT Equivalent & Substitute Parts
Part Overview
The P1170.183NLT is a 18 µH shielded wirewound inductor manufactured by Pulse Electronics, rated for 3.4 A continuous current with a maximum DC resistance of 40mOhm. This component is classified as Active status and is RoHS3 compliant. Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable electrical and mechanical tolerances for surface mount applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Inductance | 18 µH |
| Tolerance | ±20% |
| Current Rating (Amps) | 3.4 A |
| DC Resistance (DCR) | 40mOhm Max |
| Shielding | Shielded |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 130°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the P1170.183NLT are qualified based on the following criteria:
- Inductance value of 18 µH with ±20% tolerance
- Shielded construction for electromagnetic interference mitigation
- Surface mount packaging with nonstandard case dimensions
- Current rating capability at or above 3.4 A
- DC resistance within acceptable operating parameters
- Operating temperature range compatibility (-40°C minimum)
- RoHS3 compliance and MSL 1 rating
The three identified substitutes meet these core electrical and mechanical requirements while maintaining functional equivalence in shielded inductor applications.
Parameter Comparison
| Parameter | P1170.183NLT (Pulse) | 744771118 (Würth) | SRR1206-180ML (Bourns) | SRR1260-180M (Bourns) |
|---|---|---|---|---|
| Inductance | 18 µH | 18 µH | 18 µH | 18 µH |
| Tolerance | ±20% | ±20% | ±20% | ±20% |
| Current Rating (Amps) | 3.4 A | 3.48 A | 2.5 A | 4.2 A |
| Current - Saturation (Isat) | 3.4 A | 4.3 A | 4.7 A | 3.9 A |
| DC Resistance (DCR) | 40mOhm Max | 34mOhm Max | 50mOhm Max | 36mOhm Max |
| Shielding | Shielded | Shielded | Shielded | Shielded |
| Frequency - Self Resonant | 14 MHz | 15 MHz | 14 MHz | 15.5 MHz |
| Operating Temperature | -40°C ~ 130°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active |
Engineering Selection Recommendations
All four inductors maintain Active product status with full RoHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility across applications.
744771118 (Würth Elektronik WE-PD series) provides the closest electrical match with 3.48 A current rating and 34mOhm DCR, representing the most direct functional equivalent. This part includes AEC-Q200 automotive qualification.
SRR1260-180M (Bourns) offers the highest current rating at 4.2 A with 36mOhm DCR, suitable for applications requiring additional current margin. This part features the highest self-resonant frequency at 15.5 MHz.
SRR1206-180ML (Bourns) operates at a reduced current rating of 2.5 A with 50mOhm DCR. This substitute is applicable only in circuits where the 3.4 A rating of the primary part is not required.
Operating temperature range differs slightly: the P1170.183NLT extends to 130°C, while all substitutes are rated to 125°C maximum. Applications requiring operation above 125°C require the original part.
Frequently Asked Questions (FAQ)
Q: Can SRR1206-180ML be used as a direct replacement for P1170.183NLT?
A: SRR1206-180ML is electrically equivalent in inductance and shielding but is rated for only 2.5 A continuous current versus the 3.4 A rating of P1170.183NLT. Substitution is valid only in circuits where peak current does not exceed 2.5 A.
Q: What is the primary difference between the three substitute parts?
A: The substitutes differ in current rating and DC resistance. 744771118 matches the original current rating most closely at 3.48 A. SRR1260-180M provides the highest current capacity at 4.2 A. SRR1206-180ML operates at reduced current of 2.5 A. All maintain 18 µH inductance and shielded construction.
Q: Are there packaging differences between these parts?
A: P1170.183NLT uses nonstandard packaging. 744771118 is supplied in Tape & Reel format. SRR1206-180ML is supplied in Tape & Reel. SRR1260-180M is supplied in Cut Tape & Digi-Reel format. Physical dimensions vary slightly across all four parts, ranging from 12.00mm to 12.70mm in length and width, with heights between 6.00mm and 6.50mm.
Q: Does operating temperature range affect substitution decisions?
A: Yes. P1170.183NLT is rated to 130°C, while all three substitutes are rated to 125°C maximum. Applications requiring sustained operation above 125°C require the original P1170.183NLT part.
Q: Which substitute offers the best DC resistance performance?
A: 744771118 provides the lowest DC resistance at 34mOhm maximum, followed by SRR1260-180M at 36mOhm. P1170.183NLT is specified at 40mOhm, and SRR1206-180ML at 50mOhm. Lower DCR reduces resistive losses in the inductor.
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