Schneider ZB4BZ102 Harmony XB4 Body + 1 NC Contact Block Screw Clamp

The Schneider Electric ZB4BZ102 is a mounting collar with single contact block from the Harmony XB4 series, combining a Zamak fixing collar, body, and one normally closed (1 NC) contact block in a single unit. The contact block uses slow-break operation, provides positive opening per IEC 60947-5-1 Appendix K (mandatory for safety circuits), and connects via screw clamp terminals accepting cable sizes from 0.22 mm² up to 2 × 1.5 mm². Terminals use the Schneider Electric anti-loosening system.

Technical specifications:

• Part number: ZB4BZ102
• Manufacturer: Schneider Electric
• Series: Harmony XB4
• Type: Mounting collar with single contact block (body + fixing collar + contact block)
• Contacts: 1 NC (normally closed)
• Contact operation: Slow-break
• Contact block type: Single
• Positive opening: Yes (IEC 60947-5-1 Appendix K)
• Connection: Screw clamp terminals, 0.22 mm² minimum, up to 2 × 1.5 mm² with cable end (Schneider Electric anti-loosening system)
• Fixing collar material: Zamak
• Contact material: Silver alloy (Ag/Ni)
• [Ith] conventional thermal current: 10 A (IEC 60947-5-1)
• [Ui] rated insulation voltage: 600 V (IEC 60947-1)
• [Uimp] rated impulse withstand voltage: 6 kV (IEC 60947-1)
• [Ie] rated operational current: 3 A @ 240 V AC-15 (A600); 0.27 A @ 250 V DC-13 (Q600)
• Short-circuit protection: 10 A gG cartridge fuse (IEC 60947-5-1)
• Operating force: 2 N (NC change of state)
• Operating travel: 1.5 mm (NC change), 4.3 mm total
• Mechanical durability: 5,000,000 cycles
• Electrical durability: 10,000,000 cycles @ AC-15, 2 A, 230 V
• IP rating: IP20 (IEC 60529)
• Tightening torque: 0.8…1.2 N.m
• Operating temperature: -40 to +70 °C
• Storage temperature: -40 to +70 °C
• Vibration resistance: 5 gn, 2-500 Hz (IEC 60068-2-6)
• Shock resistance: 30 gn / 18 ms and 50 gn / 11 ms (IEC 60068-2-27)
• Weight: 0.053 kg
• Standards: IEC 60947-1, IEC 60947-5-1, IEC 60947-5-4, IEC 60947-5-5, UL 508, CSA C22.2 No 14
• Certifications: UL, CSA, DNV, BV, LROS
• Country of origin: France
• GTIN: 3389110889383

Features and benefits:

• Positive opening contact (IEC 60947-5-1 Appendix K) - mandatory for safety circuits and emergency stop applications
• All-in-one mounting collar with integrated contact block - reduces inventory and assembly time vs separate body and contact block parts
• Schneider Electric anti-loosening screw clamp terminals accept 0.22…1.5 mm² wiring with or without cable ends
• 5,000,000 mechanical and 10,000,000 electrical cycles for long service life in high-cycle control applications

Applications:

• Control wiring for Harmony XB4 emergency stops (e.g. ZB4BS834), push buttons and selector switches requiring an NC contact
• Machine safety circuits using positive-opening contacts per ISO 13850 / IEC 60947-5-1
• Industrial control panels and operator interfaces with 22 mm Ø panel cut-outs

Related products in this family (mounting collar + contact block variants):

• ZB4BZ101 - 1 NO (normally open)
• ZB4BZ102 - 1 NC (this product)
• ZB4BZ103 - 2 NO
• ZB4BZ104 - 2 NC
• ZB4BZ105 - 1 NO + 1 NC
• ZB4BZ141 - 1 NO + 2 NC
• Quick-Connect terminals: append "3" to part number (e.g. ZB4BZ1023)
• Ring-Tongue compatible terminals: append "9" to part number (e.g. ZB4BZ1029)

Also known as: Schneider ZB4BZ102, Harmony XB4 mounting collar with 1 NC contact block, ZB4-BZ102.