SA77SB0 Bourns SA77SB0 is a surface mount thermal cutoff breaker with a rated trip temperature of 77°C ±5°C and a minimum reset temperature of 40°C.
Mfr Part #:

SA77SB0

Available from 2 distributors
Mfr Name: Bourns
Bourns
Bourns SA77SB0 is a surface mount thermal cutoff breaker with a rated trip temperature of 77°C ±5°C and a minimum reset temperature of 40°C.
Total Stock: 5,136 pcs
$ Price Range: $0.44 - $1.24

SA77SB0 Available from 2 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
2,568 pcs
2568 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
2,568 pcs
2568 pcs On Request 1 On Request On Request On Request On Request On Request

SA77SB0 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Approval Agency
Breaking Current Rating
Current Rating (Amps)
Cycle Life (Nominal @ 5 V/60 A)
Cycle Life (Nominal @ 9 V/25 A)
Height
Holding Voltage
Lead Style
Leakage Current
Length
Mounting Type
Prop 65
Rated Functioning Temperature
Reset Temperature
Resistance
Tape & Reel
Terminal Length
Termination Style
Type
Voltage Rating
Width

SA77SB0 Description

Short technical summary and product information.

The Bourns SA77SB0 is a miniature thermal cutoff (TCO) breaker from the SA Series, designed for overtemperature and overcurrent protection in battery cell applications. It features a rated functioning temperature of 77°C ±5°C and resets when the ambient temperature drops to a minimum of 40°C.

 

Electrically, the device is rated for 25 A at 9 V DC for 6000 cycles and can break up to 60 A at 5 V DC for 100 cycles. The maximum voltage rating is 28 V DC at 25 A. It has a maximum leakage current of 200 mA at 25°C and a maximum resistance of 7 mΩ. The minimum holding voltage is 3 V at 25°C.

 

The SA77SB0 comes in a nonstandard surface mount package with 4 terminals (SMD) and measures 8.0 mm x 5.4 mm x 2.0 mm. It is RoHS3 compliant and carries cUL, TUV, and UL agency approvals.

SA77SB0 Quick Information

Product Type: Thermal Cutoff (Breaker)
Series: SA
Canonical Name: Bourns SA77SB0 SA Series Thermal Cutoff (Breaker), 77°C ±5°C Trip, 40°C Min Reset, Surface Mount
Subcategory: Miniature Breaker

SA77SB0 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

SA77SB0 Estimated Pricing

Qty Low High
1+ $1.24 $1.24
5+ $1.03 $1.03
10+ $0.95 $0.95
50+ $0.79 $0.79
100+ $0.73 $0.73
250+ $0.65 $0.65
500+ $0.60 $0.60
1,000+ $0.55 $0.55
5,000+ $0.46 $0.46
10,000+ $0.44 $0.44

Estimated market price range - modelled values for guidance only, not live distributor offers.

SA77SB0 Features

  • Rated trip temperature of 77°C ±5°C.
  • Resets at a minimum of 40°C ambient.
  • Contact rating of 25 A at 9 V DC.
  • Maximum breaking current of 60 A at 5 V DC.
  • Surface mount with 4 terminals (SMD).

SA77SB0 Applications

  • Protects lithium polymer and prismatic battery cells.
  • Suitable for notebook and tablet PC battery packs.
  • Used in smartphone battery protection circuits.
  • Provides USB cable overtemperature protection.

SA77SB0 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the trip temperature of the Bourns SA77SB0?

The rated functioning (trip) temperature is 77°C ±5°C.

What is the reset temperature of the SA77SB0?

The minimum reset temperature is 40°C.

What is the current rating of the SA77SB0?

The contact current rating is 25 A at 9 V DC for 6000 cycles.

What is the maximum voltage rating for the SA77SB0?

The maximum voltage rating is 28 V DC at 25 A.

What is the package type for the SA77SB0?

The package is a nonstandard surface mount with 4 terminals (SMD).

What are the dimensions of the SA77SB0?

The device measures 8.0 mm in length, 5.4 mm in width, and 2.0 mm in height.

What agency approvals does the SA77SB0 have?

It is approved by cUL, TUV, and UL.

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