# Pololu 30:1 Micro Gearmotor HPCB 12V > Pololu #3038 30:1 Micro Metal Gearmotor HPCB 12V (N20 size): 1100 rpm and 0.08 A no-load at 12 V, 0.39 kg·cm / 0.75 A stall (extrapolated), 1.1 W max output, 30 % peak efficiency, 29.86:1 metal gearbox, 10 × 12 × 25.6 mm max, Ø3 mm × 10 mm D-shaft, two M1.6 face holes, 9.5 g. - Manufacturer: Pololu - Part number: 3038 - Category: Motors - Canonical page: https://www.xirkit.io/products/pololu-30-1-micro-gearmotor-hpcb-12v-4f88 - Pinout: https://www.xirkit.io/products/pololu-30-1-micro-gearmotor-hpcb-12v-4f88/pinout - Structured JSON: https://www.xirkit.io/products/pololu-30-1-micro-gearmotor-hpcb-12v-4f88/data.json - Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit. ## Key specifications | Property | Value | | --- | --- | | Motor type | gearmotor | | Rated voltage | 12 V | | Rated torque | 0.01 N·m | | Stall torque | 0.038 N·m | | Rated speed | 840 rpm | | No-load speed | 1,100 rpm | | Rated current | 0.23 A | | Gear ratio | 29.86:1 | | Shaft diameter | 3 mm | | Encoder | none | | Dimensions | 12 × 10 × 35.6 mm | ## Pinout (2 pins, 0 with electrical limits) | Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | M1 | — | motor plus | — | m1 | — | — | — | — | — | — | — | | M2 | — | motor minus | — | m2 | — | — | — | — | — | — | — | ## Where to buy | Supplier | Price | Stock | Checked | URL | | --- | --- | --- | --- | --- | | www.pololu.com | 26.45 USD | in_stock | 2026-10-01 | https://www.pololu.com/product/3038 | ## FAQ **How much does the Pololu 30:1 Micro Gearmotor HPCB 12V cost?** From $26.45 at www.pololu.com. Prices are observed unit prices before tax and shipping. **What are the Pololu 30:1 Micro Gearmotor HPCB 12V dimensions?** 12 × 10 × 35.6 mm. A STEP model is available for enclosure fit checks. **Where does this Pololu 30:1 Micro Gearmotor HPCB 12V data come from?** Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed. ## Sources - [Pololu 30:1 Micro Gearmotor HPCB 12V datasheet](https://www.pololu.com/file/0J1487/pololu-micro-metal-gearmotors-rev-6-2.pdf) - [www.pololu.com listing](https://www.pololu.com/product/3038) ## Part graph ### Alternatives (by use case) - [Pololu 30:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-30-1-micro-gearmotor-hpcb-6v-4f3c) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 75:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-75-1-micro-gearmotor-hpcb-6v-73f1) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 10:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-10-1-micro-gearmotor-hpcb-12v-0e9e) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 30:1 Micro Metal Gearmotor MP 6V](https://www.xirkit.io/products/pololu-30-1-micro-metal-gearmotor-mp-6v-4739) — Both serve mobile robot drive trains — check the trade-offs; $23.95 vs $26.45 - [Pololu 10:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-10-1-micro-gearmotor-hpcb-6v-7314) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 15:1 Micro Metal Gearmotor LP 6V](https://www.xirkit.io/products/pololu-15-1-micro-metal-gearmotor-lp-6v-029d) — Both serve mobile robot drive trains — check the trade-offs; $23.95 vs $26.45 - [Pololu 15:1 Micro Metal Gearmotor HP 6V](https://www.xirkit.io/products/pololu-15-1-micro-metal-gearmotor-hp-6v-2c24) — Both serve mobile robot drive trains — check the trade-offs; $23.95 vs $26.45 - [Pololu 100:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-100-1-micro-gearmotor-hpcb-12v-02db) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 50:1 Micro Metal Gearmotor MP 6V](https://www.xirkit.io/products/pololu-50-1-micro-metal-gearmotor-mp-6v-1ce9) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $23.95 - [Pololu 30:1 Micro Metal Gearmotor HP 6V](https://www.xirkit.io/products/pololu-30-1-micro-metal-gearmotor-hp-6v-343b) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $23.95 - [Pololu 50:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-50-1-micro-gearmotor-hpcb-12v-3a12) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 75:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-75-1-micro-gearmotor-hpcb-12v-5eaf) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 298:1 Micro Metal Gearmotor HP 6V](https://www.xirkit.io/products/pololu-298-1-micro-metal-gearmotor-hp-6v-d4b1) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $23.95 - [Pololu 100:1 Micro Metal Gearmotor HP 6V](https://www.xirkit.io/products/pololu-100-1-micro-metal-gearmotor-hp-6v-e223) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $23.95 - [Pololu 15:1 Micro Metal Gearmotor MP 6V](https://www.xirkit.io/products/pololu-15-1-micro-metal-gearmotor-mp-6v-4f76) — Both serve mobile robot drive trains — check the trade-offs; $23.95 vs $26.45 - [goBILDA 5000 Series 12V Motor](https://www.xirkit.io/products/gobilda-5000-series-12v-motor-79ed) — Both serve mobile robot drive trains — check the trade-offs; $19.99 vs $26.45 - [Pololu 100:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-100-1-micro-gearmotor-hpcb-6v-9166) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 75:1 Micro Metal Gearmotor LP 6V](https://www.xirkit.io/products/pololu-75-1-micro-metal-gearmotor-lp-6v-f367) — Both serve mobile robot drive trains — check the trade-offs; $23.95 vs $26.45 - [Pololu 50:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-50-1-micro-gearmotor-hpcb-6v-a489) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 15:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-15-1-micro-gearmotor-hpcb-12v-b1d3) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45 - [Pololu 15:1 Micro Gearmotor HPCB 6V](https://www.xirkit.io/products/pololu-15-1-micro-gearmotor-hpcb-6v-7011) — Both serve mobile robot drive trains — check the trade-offs; $26.45 vs $26.45