Share to:
ML621-TZ1
ML621-TZ1
| Part Number | ML621-TZ1 |
|---|---|
| Manufacturer | FDK Corporation |
| Category | Battery Products > Recharging Batteries (Secondary) > Coin Cell / Button Cell Batteries |
| Description | Rechargeable ML (Manganese Lithium) Coin Cell Battery, 3.0V, 5.8mAh, Through‑Hole / Tabbed Terminal Assembly (TZ1). |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
ML621‑TZ1 is FDK’s rechargeable 3.0V manganese‑lithium coin cell with factory‑welded TZ1 through‑hole pins for PCB soldering. Rated 5.8mAh, it features stable output, low self‑discharge and excellent trickle‑charge tolerance. Ideal for RTC, SRAM memory backup, industrial, automotive and medical standby power applications.
Core Advantages
Stable ML Chemistry & Long Cycle Life
Stable 3.0V ML chemistry, supports long‑term trickle charging with long cycle life.
Factory‑Welded TZ1 Terminal
Pre‑welded TZ1 through‑hole pins, avoid direct heat damage to battery cell.
Compact Small Form Factor
Compact 6.8×2.65mm form factor, 5.8mAh capacity for space‑constrained designs.
Wide Temperature & Low Self‑Discharge
-20℃~+60℃ wide operating range, low self‑discharge for backup power scenarios.
Key Specifications
| Brand | FDK Corporation |
|---|---|
| RoHS Status | RoHS Compliant / EU Directive Compliant |
| Warranty | 1‑Year Standard Quality Warranty |
| Package / Case | Coin Cell 6.8mm x 2.65mm (ML621 Size) with TZ1 Tabbed Pins |
| Mounting Type | Through‑Hole / PCB Pin Soldering |
| Surface Marking / Silkscreen | ML621 / FDK Logo,Marking |
| Battery Chemistry | Rechargeable Manganese Lithium (ML) |
| Nominal Voltage | 3.0 V |
| Nominal Capacity | 5.8 mAh (Discharged down to 2.0V) |
| Standard Charge Voltage | 2.80 V to 3.10 V (Recommended 3.0 V ± 0.15 V) |
| Continuous Discharge Current | 0.015 mA (15 µA) Standard |
| Max Continuous Discharge Current | 0.20 mA |
| Cut‑off Discharge Voltage | 2.0 V |
| Cycle Life Performance | > 100 cycles (100% DOD), > 1000 cycles (10% DOD) |
| Operating Temperature Range | -20°C to +60°C |
| Storage Temperature Range | -20°C to +45°C |
| Dimensions (Body Only) | Diameter: 6.8 mm | Height: 2.65 mm |
| Weight | Approx 250 mg |
| Packaging Format | Tray / Bulk Protective Packaging |
Precautions
- Charging Requirement: Keep charging voltage 2.80‑3.10V (nominal 3.0V). Add current‑limiting resistor on charge path. Over‑voltage will cause leakage or permanent cell damage.
- Soldering Rule: Only solder on TZ1 terminals. Do not solder directly to battery can. For wave soldering: 250‑270℃, soldering time ≤5 seconds to avoid over‑heat damage.
- Anti‑Short‑Circuit: Prevent terminal short‑circuit during handling and storage, short‑circuit will damage internal structure.
- Polarity Check: Confirm correct polarity before soldering. Reverse charging will destroy the battery.
- Operation Prohibition: Do not disassemble, crush, burn or mix different battery types, risk of swelling, leakage or fire hazard.
Typical Applications
- Real‑Time Clock (RTC) power backup in smart energy meters, security systems, and industrial controllers
- SRAM and non‑volatile memory data retention in automotive electronics, telematics, and gateways
- Backup power modules in digital cameras, POS terminals, and handheld instruments
- Wireless IoT sensors, environmental monitoring nodes, and smart home automation devices
- Embedded microcontrollers, medical telemetry units, and asset management systems
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: Is the FDK ML621‑TZ1 a rechargeable or primary battery?
A: ML621‑TZ1 is secondary rechargeable 3.0V ML coin cell, designed for long‑term backup power.
Q2: What does the “TZ1” suffix indicate in the ML621‑TZ1 part number?
A: TZ1 means factory‑pre‑welded through‑hole pin terminals for PCB soldering. Other suffixes stand for different terminal styles; PCB modification is required for cross‑suffix replacement.
Q3: How should the charging circuit for the ML621‑TZ1 be designed?
A: Use regulated constant‑voltage 2.80‑3.10V (nominal 3.0V) with series current‑limiting resistor. Continuous trickle‑charge is allowed for backup applications.
Q4: Can ML621‑TZ1 directly replace CR2032 or other lithium coin cells?
A: Not direct drop‑in replacement. CR‑series are primary non‑rechargeable; ML621‑TZ1 is rechargeable and requires charging circuit. Dimension and pin layout also differ.
Q5: Are there cross‑brand compatible alternatives for ML621‑TZ1?
A: Few direct pin‑to‑pin cross‑brand equivalents. Most competing ML‑type cells use different terminals. Bare ML621 can work but needs manual terminal welding, not fit for mass production.
Q6: What is the correct soldering requirement for ML621‑TZ1?
A: Only solder TZ1 metal pins. Wave soldering condition: 250‑270℃ within 5 seconds. Never solder battery can directly; high heat will damage internal sealing structure.
Q7: What is difference between ML621 bare cell and ML621‑TZ1?
A: ML621 bare cell has no terminals. ML621‑TZ1 adds factory‑welded TZ1 through‑hole pins. Electrical specs are identical, only mounting structure differs.
Q8: Can I order custom terminal pin designs, lead wires, or connectors for FDK batteries?
A: Custom terminals, pins and wire assemblies are available upon request. Submit your specs via our Quick Inquiry for tailored battery solutions.
Related Products
