SEN0235 – Comprehensive Datasheet Extract
(Organized by topic, English only, title-cased headings)

1. Product IdentityModel: SEN0235Official description: “EC11I-152 11 mm Rotary Encoder with 15 pulses / 360°, integral push-switch, detent”Manufacturer: Shenzhen Bester Electronics Co., Ltd. (百斯特)Datasheet date: 2014-09-01 (rev. A0)
2. Scope & Environmental Limits• Applicable to low-current digital circuits in consumer & industrial controls.• Operating temperature: –30 °C to +80 °C• Storage temperature: –40 °C to +85 °C• Standard test atmosphere: 15 °C –35 °C, 25 % –85 % RH, 86 kPa –106 kPa
3. Electrical RatingsEncoder section• Rated supply: DC 5 V• Common lead current: 1 mA (max 10 mA, min 0.5 mA)• Phase-lead current: 0.5 mA (max 5 mA, min 0.5 mA)Push-switch section• Rated supply: DC 5 V• Max current: 10 mA (resistive load)
4. Output Format & Resolution• Two-phase quadrature (A, B) plus common (C)• 15 pulses per 360° rotation (15 PPR)• 30 detents per revolution → 12° ± 2° step angle• Direction: A leads B for clockwise rotation (viewed from shaft end)
5. Output Characteristics (Encoder)• Phase difference: T1, T3, T4 ≥ 0.08 T (≥ 14.4° electrical)• Chattering (t1, t3): ≤ 3 ms (1.5 V – 3.5 V transition)• Sliding noise / bounce (t2): ≤ 2 ms above 1.5 V in ON region• Contact resistance: ≤ 1 Ω (steady ON state)• Insulation resistance: ≥ 100 MΩ (250 V DC, terminal-to-frame)• Dielectric strength: 300 V AC 1 min, no breakdown
6. Mechanical Characteristics• Total rotational angle: 360° endless (no mechanical stop)• Detent torque: 2 –15 mN·m (20 –150 gf·cm)• Shaft push-pull strength: 8 kgf static 10 s (soldered on PCB) → axial play ≤ 0.4 mm• Terminal strength: 5 N (500 g) 1 min, any direction – no loosening or damage• Bushing nut tightening torque: ≥ 7 kgf·cm• Shaft wobble (5 mm from tip): ≤ 0.7 × L/30 mm p-p (L = distance to measuring point)• Rotational wobble: ≤ 5°
7. Switch Mechanical Data• Circuit: single-pole single-throw (SPST) “push-ON”• Operating force: 500 ± 200 gf• Travel: 0.5 ± 0.3 mm (detented version) or 1.5 ± 0.5 mm (optional)• Contact resistance: ≤ 100 mΩ (measured at 5 V 1 mA)• Bounce: ≤ 10 ms
8. Endurance & ReliabilityRotational life (encoder)• 30 000 ± 200 cycles @ ≤ 100 gf·cm detent torque• 15 000 ± 200 cycles @ > 100 gf·cm• After test: chattering ≤ 5 ms, bounce ≤ 3 ms, contact resistance ≤ 200 Ω, detent feel still present
9. Switch life (push)
   • 20 000 ± 200 cycles for 0.5 mm travel
   • 15 000 ± 200 cycles for 1.5 mm travel
   • Contact resistance ≤ 200 Ω after test
10. Environmental endurance
    • Damp heat: 40 °C / 90-95 % RH 96 h → all specs retained
    • Dry heat: 85 °C 96 h → all specs retained
    • Cold: –40 °C 96 h → all specs retained
    • Soldering heat: dip 260 °C ≤ 3 s or hand 300 °C ≤ 3 s – no damage, characteristics OK
11. Solderability: ≥ 75 % solder coverage after 260 °C dip 3 ± 0.5 s
12. Recommended Interface Circuit• Add 10 kΩ pull-up to 5 V on A, B, C; 10 nF –100 nF capacitor to GND for debounce (see datasheet Fig. 1)• Sample A-phase as reference; include software hysteresis to mask chatter / bounce
13. Mounting & Handling Notes• Store in moisture-/gas-proof packaging; use within 6 months of opening.• Avoid water, dew, corrosive gases.• Keep soldering time ≤ 3 s, temperature ≤ 260 °C (dip) or 300 °C (hand).• Do not exceed 8 kgf axial load during assembly.
14. Package & Ordering Information• 11 mm metal bushing, solder turret terminals, 15 mm threaded bush, M9 nut & washer included.• Weight: ≈ 4 g• RoHS status: lead-free tinned terminals• DFA footprint: 11 mm panel hole, 2.5 mm PCB thickness recommended, 0.8 mm –1.6 mm solderable.