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SRJ-16 Equivalent & Substitute Parts
Part Overview
The SRJ-16 is a hexadecimal rotary DIP switch manufactured by E-Switch, designed for through-hole mounting applications requiring 16-position selection capability at 100mA and 5VDC. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. The SRJ-16 serves applications requiring tool-actuated rotary selection with flush, recessed actuator positioning.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Circuit Type | Hexadecimal |
| Number of Positions | 16 |
| Current Rating | 100mA |
| Voltage Rating | 5VDC |
| Actuator Type | Rotary for Tool |
| Mounting Type | Through Hole |
| Pitch | 0.100" (2.54mm) |
| Termination Style | PC Pin |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
The NDFR16P manufactured by NKK Switches qualifies as a direct substitute for the SRJ-16 based on the following critical parameters:
- Circuit Configuration: Both parts implement hexadecimal 16-position switching logic
- Electrical Ratings: Identical current rating (100mA) and voltage rating (5VDC)
- Actuator Mechanism: Both feature rotary tool-actuated operation with flush, recessed actuator positioning
- Mounting and Termination: Matching through-hole mounting with PC pin termination
- Pitch Spacing: Identical 0.100" (2.54mm) pitch for PCB footprint compatibility
- Compliance: Both maintain ROHS3 compliance and REACH unaffected status
Substitution is valid where the mechanical envelope and electrical performance parameters align with the application requirements.
Parameter Comparison
| Parameter | SRJ-16 (E-Switch) | NDFR16P (NKK Switches) |
|---|---|---|
| Manufacturer | E-Switch | NKK Switches |
| Circuit Type | Hexadecimal | Hexadecimal |
| Number of Positions | 16 | 16 |
| Current Rating (Amps) | 100mA | 100mA |
| Voltage Rating | 5VDC | 5VDC |
| Actuator Type | Rotary for Tool | Rotary for Tool |
| Actuator Level | Flush, Recessed | Flush, Recessed |
| Height Above Board | 0.256" (6.50mm) | 0.205" (5.20mm) |
| Length | 0.394" (10.00mm) | 0.312" (7.92mm) |
| Mounting Type | Through Hole | Through Hole |
| Termination Style | PC Pin | PC Pin |
| Pitch | 0.100" (2.54mm) | 0.100" (2.54mm) |
| Operating Temperature Range | -10°C ~ 60°C | -25°C ~ 75°C |
| Electrical Life | 15,000 Cycles | 20,000 Cycles |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| Product Status | Obsolete | Last Time Buy |
Engineering Selection Recommendations
The NDFR16P represents the qualified substitute for the obsolete SRJ-16. Selection between these parts should be based on:
Product Lifecycle Considerations: The SRJ-16 is classified as obsolete, while the NDFR16P carries Last Time Buy status. For new designs or production continuity, the NDFR16P is the appropriate selection.
Compliance and Certifications: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.
Mechanical Envelope: The NDFR16P exhibits reduced height (0.205" vs. 0.256") and length (0.312" vs. 0.394"), providing a more compact footprint while maintaining identical pitch and termination compatibility. PCB layout verification is required to confirm clearance in space-constrained applications.
Operating Performance: The NDFR16P provides extended operating temperature range (-25°C to 75°C versus -10°C to 60°C) and increased electrical life (20,000 cycles versus 15,000 cycles), offering enhanced reliability margins for demanding environments.
Frequently Asked Questions (FAQ)
Q: Can the NDFR16P directly replace the SRJ-16 on existing PCBs?
A: Yes, provided PCB layout accommodates the reduced mechanical envelope. Both parts share identical pitch (0.100"), termination style (PC Pin), and mounting type (through-hole). Verify clearance for the smaller height and length dimensions of the NDFR16P.
Q: What are the key electrical compatibility factors?
A: Both parts operate at identical voltage (5VDC) and current (100mA) ratings with hexadecimal 16-position switching. Electrical performance is equivalent for applications within these specifications.
Q: Why does the NDFR16P have a longer electrical life rating?
A: The NDFR16P is rated for 20,000 cycles compared to the SRJ-16's 15,000 cycles. This reflects design and manufacturing differences between manufacturers and contact material composition (Beryllium Copper versus Glass Fabric Epoxy Resin).
Q: Are there temperature range limitations when substituting?
A: The NDFR16P operates across -25°C to 75°C, exceeding the SRJ-16's -10°C to 60°C range. Applications operating within the original SRJ-16 temperature specification will function identically with the NDFR16P. Applications requiring extended temperature operation benefit from the NDFR16P's broader range.
Q: What packaging differences exist between these parts?
A: The SRJ-16 is supplied in standard packaging, while the NDFR16P is packaged in trays. Verify packaging compatibility with receiving and assembly processes.
Q: Are both parts washable?
A: Yes, both the SRJ-16 and NDFR16P are washable, supporting standard PCB cleaning processes.
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