HC-49/U-S12000000ABIT Equivalent & Substitute Parts

Part Overview

The HC-49/U-S12000000ABIT is a 12 MHz through-hole crystal oscillator manufactured by Citizen Finedevice Co Ltd. This fundamental mode crystal is designed for applications requiring precise frequency generation with a load capacitance of 16pF and an equivalent series resistance of 80 Ohms. The part maintains active product status and is ROHS3 compliant. Substitute parts may be required due to inventory constraints, application-specific load capacitance requirements, or supply chain considerations.

Substiute Parts

HC-49/U-S12000000ABIT

Citizen Finedevice Co LtdIn Stock: 801HC-49/U-S12000000ABIT Datasheet

Current PartRFQ

HC-49/U-S12000000ABJB

Citizen Finedevice Co LtdIn Stock: 6611HC-49/U-S12000000ABJB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HC-49/U-S12000000ABIT is determined by the following critical parameters:

• Frequency: 12 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• ESR: 80 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -10°C ~ 60°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: HC-49/US (exact match required)

The load capacitance parameter (16pF vs. 18pF) represents the primary technical variance among qualified substitutes. Both values fall within acceptable operating parameters for this crystal category and do not prevent functional substitution in applications where the circuit design accommodates the specified load capacitance.

Parameter Comparison

Engineering Selection Recommendations

Both the HC-49/U-S12000000ABIT and HC-49/U-S12000000ABJB maintain active product status and meet all regulatory compliance requirements (ROHS3, REACH Unaffected). Selection between these parts depends on circuit-specific load capacitance requirements. The HC-49/U-S12000000ABIT specifies 16pF load capacitance, while the HC-49/U-S12000000ABJB specifies 18pF load capacitance. Circuit design parameters must accommodate the selected load capacitance value to ensure proper frequency stability and oscillation characteristics.

Frequently Asked Questions (FAQ)

Q: Can HC-49/U-S12000000ABJB replace HC-49/U-S12000000ABIT?

A: Substitution is possible when circuit design parameters accommodate an 18pF load capacitance instead of 16pF. All other electrical and mechanical specifications are identical.

Q: What is the significance of load capacitance differences?

A: Load capacitance affects the crystal's operating frequency and stability characteristics. The circuit design must specify the load capacitance value. Mismatched load capacitance may result in frequency deviation outside acceptable tolerance ranges.

Q: Are both parts physically interchangeable?

A: Yes. Both parts use the HC-49/US package with identical dimensions (0.453" L x 0.183" W, 11.50mm x 4.66mm) and maximum seated height (0.138", 4.60mm). Through-hole mounting compatibility is identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited).

Q: What operating temperature range applies to both parts?

A: Both parts operate across -10°C to 60°C with identical frequency stability (±50ppm) and tolerance (±30ppm).