603-12-67 Crystal 12.0000MHz 20pF SMD Equivalent & Substitute Parts

Part Overview

The Fox Electronics 603-12-67 is a 12 MHz fundamental mode crystal oscillator in 4-SMD surface mount package with 20pF load capacitance. This component is designed for timing and frequency control applications requiring precise 12 MHz reference signals. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts may be required due to inventory constraints, supply chain disruptions, or design optimization needs while maintaining electrical and mechanical compatibility.

Substiute Parts

603-12-67

Fox ElectronicsIn Stock: 887603-12-67 Datasheet

Current PartRFQ

ECS-120-20-33-TR

ECS Inc.In Stock: 22330ECS-120-20-33-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The ECS-120-20-33-TR qualifies as a direct substitute for the 603-12-67 based on the following critical parameters:

• Frequency: Both parts operate at 12 MHz
• Frequency Stability: Both maintain ±50ppm tolerance
• Load Capacitance: Both specified at 20pF
• Operating Mode: Both are fundamental mode crystals
• Package / Case: Both use 4-SMD, No Lead configuration
• Physical Dimensions: Both measure 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Height - Seated (Max): Both rated at 0.031" (0.80mm)
• Mounting Type: Both are surface mount
• RoHS Status: Both ROHS3 compliant
• Moisture Sensitivity Level: Both rated MSL 1 (Unlimited)

The ECS-120-20-33-TR represents a compatible alternative with equivalent electrical performance and identical mechanical form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the Fox Electronics 603-12-67 and ECS Inc. ECS-120-20-33-TR are Active status components with ROHS3 compliance and REACH Unaffected designation. The ECS-120-20-33-TR offers an extended operating temperature range (-20°C ~ 70°C versus -10°C ~ 60°C) and lower ESR (100 Ohms versus 150 Ohms). Selection between these parts should be based on application-specific temperature requirements and circuit impedance matching needs. Both parts meet identical frequency, load capacitance, and mechanical specifications required for direct substitution in 12 MHz crystal oscillator applications.

Frequently Asked Questions (FAQ)

Q: Can the ECS-120-20-33-TR replace the 603-12-67 in my circuit?

A: Yes. Both parts share identical frequency (12 MHz), frequency stability (±50ppm), load capacitance (20pF), operating mode (fundamental), package type (4-SMD, No Lead), and physical dimensions (0.126" L x 0.098" W, 0.031" max height). They are electrically and mechanically compatible.

Q: What is the difference in ESR between these parts?

A: The 603-12-67 has 150 Ohms ESR while the ECS-120-20-33-TR has 100 Ohms ESR. The lower ESR of the substitute part may result in reduced power consumption and improved circuit performance in applications sensitive to crystal impedance.

Q: Do both parts have the same temperature operating range?

A: No. The 603-12-67 operates from -10°C to 60°C, while the ECS-120-20-33-TR operates from -20°C to 70°C. The substitute part provides a wider temperature range suitable for extended environmental conditions.

Q: Are both parts RoHS compliant?

A: Yes. Both the 603-12-67 and ECS-120-20-33-TR are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What packaging formats are available for the ECS-120-20-33-TR?

A: The ECS-120-20-33-TR is supplied in Tape & Reel (TR) packaging, while the 603-12-67 is supplied in standard packaging format.