Siemens 6ES7392-1BJ00-0AA0 Front Connector 20-Pin | Replacement, Equivalent & Selection Guide
The Siemens 6ES7392-1BJ00-0AA0 is a 20-pin screw-type front connector designed for use with Siemens SIMATIC S7-300 series PLC signal modules (SMs) and function modules (FMs). This connector enables field wiring to be pre-wired and transferred to a replacement module without rewiring — a critical advantage in industrial maintenance scenarios. This page provides full technical specifications, compatible replacements, selection guidance, and sourcing information.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 6ES7392-1BJ00-0AA0 |
| Brand | Siemens |
| Series | SIMATIC S7-300 |
| Type | Front Connector, Screw-Type |
| Number of Pins | 20-pin |
| Wiring Method | Screw terminals |
| Compatible Module Width | 40 mm (single-width S7-300 SMs) |
| Cable Cross-Section | 0.25 – 1.5 mm² |
| Degree of Protection | IP20 |
| Operating Temperature | 0 °C to +60 °C |
| Weight | Approx. 40 g |
| Country of Origin | Germany / EU |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the 6ES7392-1BJ00-0AA0. Always verify electrical and mechanical compatibility before substitution:
- 6ES7392-1BJ00-0AA0 — Original Siemens 20-pin screw-type front connector (this product)
- 6ES7392-1AM00-0AA0 — Siemens 20-pin spring-type front connector (same pin count, different wiring method)
- 6ES7392-1AJ00-0AA0 — Siemens 20-pin front connector, older revision (check firmware compatibility)
- Third-party compatible 20-pin S7-300 front connectors (verify terminal pitch and locking mechanism)
Note: Spring-type (AM00) and screw-type (BJ00) connectors are mechanically interchangeable on the same module but differ in wiring technique. Choose based on your maintenance workflow.
Why Choose the Original Model
- Guaranteed compatibility — Engineered and tested by Siemens specifically for S7-300 signal modules
- Pre-wiring advantage — Wiring can be completed before module installation, reducing downtime
- Plug-and-replace — Connector stays with the cabinet; only the module is swapped during maintenance
- Reliable contact quality — Siemens-grade screw terminals rated for industrial vibration environments
- Long-term availability — Supported under Siemens SIMATIC S7-300 lifecycle program
Typical Applications
- Field wiring termination for S7-300 digital input/output modules (e.g., SM 321, SM 322, SM 323)
- Field wiring termination for S7-300 analog modules (e.g., SM 331, SM 332, SM 334)
- Replacement connector in existing S7-300 control panels
- Spare parts inventory for manufacturing, process, and utilities automation systems
- OEM machine builders using SIMATIC S7-300 as the control platform
System Compatibility
- Compatible PLC Platform: Siemens SIMATIC S7-300
- Compatible Module Types: 40 mm-wide signal modules (SM), function modules (FM)
- Not compatible with: S7-400, S7-1200, S7-1500, ET 200 distributed I/O (different connector form factors)
- Software: No software dependency — purely a hardware wiring accessory
Selection Guide
Use the table below to select the correct front connector for your S7-300 module:
| Connector SKU | Pins | Wiring Type | Module Width | Best For |
|---|---|---|---|---|
| 6ES7392-1BJ00-0AA0 | 20 | Screw | 40 mm | Standard SMs, new installations, high-vibration environments |
| 6ES7392-1AM00-0AA0 | 20 | Spring | 40 mm | Fast wiring, frequent rewiring scenarios |
| 6ES7392-1BM01-0AA0 | 40 | Screw | 80 mm | Wide 80 mm modules (e.g., SM 338) |
| 6ES7392-1AM01-0AA0 | 40 | Spring | 80 mm | Wide 80 mm modules, fast wiring |
Rule of thumb: Match pin count to your module’s I/O point count and choose screw-type for permanent installations or spring-type for frequent field changes.
Quality Assurance & Sourcing
- All units sourced through authorized industrial distribution channels
- Each connector inspected for terminal integrity, locking tab function, and labeling accuracy
- Original Siemens packaging and part number label preserved where available
- Traceability documentation available upon request for MRO and OEM customers
- Konmask.com specializes in genuine and compatible industrial automation components for global B2B buyers
How to Order
- Confirm your S7-300 module model number (printed on the module front label)
- Verify module width: 40 mm modules use 20-pin connectors; 80 mm modules use 40-pin connectors
- Select wiring type: screw (BJ00) or spring (AM00) based on your preference
- Add 6ES7392-1BJ00-0AA0 to cart or contact us for bulk/project pricing
- For urgent requirements, contact support@konmask.com for lead time confirmation
Replacement & Compatibility FAQ
Q: Can I use 6ES7392-1AM00-0AA0 (spring-type) instead of 6ES7392-1BJ00-0AA0 (screw-type)?
A: Yes. Both are 20-pin and mechanically interchangeable on the same S7-300 40 mm modules. The difference is only in the wiring method.
Q: Is this connector compatible with S7-1500 modules?
A: No. S7-1500 uses a different front connector system. Do not substitute.
Q: Can the wiring be pre-installed before the module arrives?
A: Yes — this is one of the key design advantages of the S7-300 front connector system. Wire the connector first, then plug it in when the module is ready.
Q: What wire gauge is supported?
A: The screw terminals accept 0.25 mm² to 1.5 mm² conductors (solid or stranded with ferrules recommended).
Q: Do you offer volume pricing for MRO or OEM orders?
A: Yes. Contact support@konmask.com with your quantity and project details.
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