CROSS-REFERENCE ALTERNATIVE
COS171TR is a Chinese-manufactured 40V Rail-to-Rail Op-Amp from COSINE (科山芯创) that cross-references to OPA171 (TI).
It is a SOT23-5 device positioned as a domestic-supply option against the imported: shorter lead times, no allocation risk and a stable price for volume production. Because the parts are not pin-identical in every case, the engineering checklist below lists what to verify before you commit.
Cross-reference · Before you substitute · Related parts · FAQ · Request a quote
COS171TR — 40V Rail-to-Rail Op-Amp, alternative to OPA171
COS171TR is supplied by Shenzhen Jingteng Electronics (JTDZ Tech) as a domestically sourced option for OPA171 (TI). Imported parts in this class are frequently subject to allocation, long lead times and steep price swings. A Chinese-manufactured equivalent removes that exposure: the parts are production-validated in industrial, consumer and automotive designs and ship from stock on a short lead time.
Cross-reference chart — which imported parts does COS171TR replace?
Every imported part number that COS171TR is published as a cross-reference alternative to, per the COSINE (科山芯创) 2025 selection table:
| imported part number | brand | Replaced by (this part) |
|---|---|---|
| OPA171 | TI | COS171TR |
Cross-reference means functional equivalence in the same application role. It is not a blanket claim of pin-for-pin identity — confirm package, pinout and the parameters listed below before you release a design change.
Device information
| Part number | COS171TR |
| Manufacturer | COSINE (科山芯创) |
| Device class | 40V Rail-to-Rail Op-Amp |
| Package | SOT23-5 |
| Pin Count | 5 |
| Verified and new, traceable date code | |
| Stock | In stock, ships within 24 hours |
| Description | 40V Rail-to-Rail Op-Amp, SOT23-5 package. |
What to verify before substituting COS171TR
These are the parameters that decide whether a cross-reference works in practice. Run through the list against the datasheet before releasing a change:
- Supply range up to 40 V total and the absolute maximum rating
- Input common-mode range at the high rail — check whether it is truly rail-to-rail at the input
- Output swing under load, at the top and the bottom rail
- Gain-bandwidth product, slew rate and stability at unity gain
- Input offset voltage, drift and bias current
- Thermal performance at 40 V — power dissipation rises quickly
- Package and pinout, plus any external compensation requirement
Typical applications
- Industrial 24 V and 36 V analogue signal chains
- High-voltage sensor interfaces
- 4–20 mA transmitters and loop-powered instruments
- Motor-control current sensing
- Power-supply monitoring and control loops
- Automotive and heavy-equipment electronics
Related COSINE parts and alternatives
Other {BRAND} parts in the same device family or the same device class — useful when you are cross-referencing a whole BOM rather than a single line item.
| COSINE part | Package | Cross-references to | Relation |
|---|---|---|---|
| COS171TRB | SOT23-5 | — | Same series |
| COS2170SRA | SOP8 | OPA2170AIDR, OPA2990 | 40V Rail-to-Rail Op-Amp |
| COS2170SRB | SOP8 | — | 40V Rail-to-Rail Op-Amp |
| COS2171SRA | SOP8 | OPA2171AIDR, OPA2991 | 40V Rail-to-Rail Op-Amp |
| COS2171SRB | SOP8 | — | 40V Rail-to-Rail Op-Amp |
| COS2172SRA | SOP8 | OPA2172AIDR, OPA2992, CA3140 | 40V Rail-to-Rail Op-Amp |
| COS2172SRB | SOP8 | — | 40V Rail-to-Rail Op-Amp |
Frequently asked questions
What does COS171TR replace?
According to the COSINE (科山芯创) 2025 cross-reference table, COS171TR is published as an alternative to OPA171 (TI).
Is COS171TR a pin-to-pin drop-in for OPA171?
Cross-reference means the part is intended for the same application role; it is not a blanket guarantee of pin-for-pin identity. Check package, pinout and the parameters listed under “What to verify” above, or send us your BOM and we will confirm before you commit.
Can you supply the OPA171 as well?
Yes. We source both the imported and the Chinese-manufactured alternative, so you can compare price, lead time and availability on the same quote.
What is the MOQ and lead time for COS171TR?
MOQ 1 pc. COS171TR is held in stock and ships within 24 hours; quotes are returned within 2 business hours. We ship worldwide including India, Vietnam and the Middle East.
Request a quote for COS171TR
Send us the part number and target quantity — we reply within 2 business hours with price, stock and a cross-reference confirmation.
Request a quote More Amplifiers / Data Conversion
Genuine original parts guaranteed — traceable lot & date code, X-ray / visual inspection and third-party test supported before shipment.
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