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MS920SE-FL27E
MS920SE-FL27E
| Part Number | MS920SE-FL27E |
|---|---|
| Manufacturer | Seiko Instruments (SII) |
| Category | Batteries & Power Products > Rechargeable Batteries (Secondary Cells) – Coin / Button Cell |
| Description | Rechargeable Manganese Silicon Lithium (MS) Coin Cell Battery with Tab Terminals, 3.0V Nominal Voltage, 11.0mAh High Capacity, Operating Temperature Range (-20°C to +60°C). |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The MS920SE-FL27E is a high-capacity rechargeable Manganese Silicon Lithium (MS) coin cell from Seiko Instruments (SII). Equipped with factory pre-welded FL27E surface mount tabs, this 3.0V battery delivers 11.0mAh capacity within 9.5 mm diameter × 2.1 mm height. It features excellent cycle performance and ultra-low self-discharge, suitable for RTC, SRAM backup, smart meters, automotive telematics and IoT devices.
Core Advantages
Special High-Capacity SE Grade Design
11.0mAh capacity, offering up to 70% longer backup time than standard 6.5mAh 920 coin cells.
Advanced Manganese Silicon Lithium (MS) Chemistry
High energy density, low internal impedance and stable voltage during long-term discharge.
Pre-Welded FL27E Solder Tabs for Automated SMT
Original FL27E lead terminal design, supporting automatic PCB assembly and avoiding thermal damage to cells.
Superior Overcharge Tolerance & Long Cycle Durability
Stable performance under continuous trickle charge, effectively preventing capacity attenuation over repeated charge-discharge cycles.
Key Specifications
| Brand | Seiko Instruments (SII) |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Green |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | Coin Cell 920 (9.5 mm Diameter × 2.1 mm Height) |
| Mounting Type | PCB Solder Tab Mount (FL27E Lead Frame Terminal Configuration) |
| Surface Marking / Silkscreen | SII MS920SE Marking |
| Battery Chemistry | Rechargeable Manganese Silicon Lithium (MS – High Capacity) |
| Nominal Voltage | 3.0 V |
| Charging Voltage | 2.8V to 3.3V (Standard 3.1V to 3.2V) |
| Nominal Capacity | 11.0 mAh |
| Standard Discharge Current | 0.05 mA (50 μA) |
| Max Continuous Discharge Current | 0.80 mA |
| Internal Impedance | Approx. 35 Ω |
| Cut-off Discharge Voltage | 2.0 V |
| Cycle Life | ≥100 cycles @100% DOD；≥1000 cycles @20% DOD |
| Operating Temperature Range | -20°C to +60°C |
| Storage Temperature | -30°C ~ +45°C |
| Weight | Approx. 0.47 g |
| Packaging Format | Tape & Reel / Tray / Bulk |
Precautions
- Charging Voltage Regulation: Keep charging voltage between 2.8V ~ 3.3V (recommended 3.1V-3.2V). Voltage over 3.4V will shorten service life and may cause internal cell failure.
- Soldering Notice: Do not solder directly on the cell casing. Only perform wave or manual soldering on the original FL27E solder terminals.
- Series Current-Limiting Resistor: Install a series current-limiting resistor in charging circuit to suppress excessive initial charging current after deep discharge recovery.
- Polarity Check: Confirm positive (+) and negative (-) PCB pads before assembly to avoid damage caused by reverse charging.
- Temperature & Mechanical Restrictions: Do not heat the battery above 85°C, avoid open flame, and prevent mechanical extrusion, impact or disassembly.
Typical Applications
- Extended Real-Time Clock (RTC) and SRAM memory retention in smart utility meters and industrial controllers
- Automotive telematics, eCall emergency positioning modules, dashcams, and OBD tracking units
- Smart home IoT sensors, security alarm touchpads, and Bluetooth Low Energy (BLE) beacons
- Handheld medical instruments, wearable health trackers, and portable measurement equipment
- Point-of-Sale (POS) terminals, electronic shelf labels (ESL), and smart digital appliances
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS, YFH Standard |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, bulk pricing and custom versions with solder tabs, pins and wire assemblies, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What is the main difference between MS920T-FL27E and MS920SE-FL27E?
A: They share identical dimension (9.5 mm × 2.1 mm) and FL27E tab configuration. MS920SE-FL27E is high-capacity variant with 11.0mAh; MS920T-FL27E is standard 6.5mAh version with wider temperature range.
Q2: What does “FL27E” mean in the model number?
A: FL27E refers to factory pre-welded SMD solder tab terminal, designed for automated PCB SMT assembly.
Q3: Can MS920SE-FL27E work with 3.0V / 3.3V RTC circuits?
A: Yes. Nominal voltage is 3.0V, suitable for 3.0V~3.3V RTC, SRAM backup systems. Float charge voltage must be controlled between 3.1V ~ 3.2V.
Q4: Is MS920SE-FL27E a direct replacement for MS920T-FL27E?
A: Mechanically compatible, same footprint. Electrically interchangeable for backup circuits. Note: SE version operating temperature is -20℃~+60℃, narrower than T model (-40℃~+85℃).
Q5: What are the charging precautions for MS920SE-FL27E?
A: Charging voltage limited to 2.8V ~ 3.3V, do NOT exceed 3.4V. A series current-limiting resistor is required on charging circuit to avoid overcurrent damage.
Q6: Can I directly solder iron on the battery metal casing?
A: Prohibited. Only solder on designated FL27E tab terminals. High temperature on cell shell will cause permanent failure or safety hazards.
Q7: What is the typical service life for RTC standby application?
A: Service life depends on quiescent current. Under low self-discharge RTC load, it can maintain backup power for several years with proper trickle charge management.
Q8: Does this coin cell have alternative cross-brand models?
A: No fully pin-to-pin equivalent alternatives. Other brand 920-size rechargeable lithium coin cells differ in chemistry, charging curve and cycle life, direct replacement is not recommended without circuit verification.
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