B3B-ZR(LF)(SN)
JST Sales America Inc.
Needs validationlow risk
This JST connector is a very strong match, likely differing only by a minor suffix variation such as pin length.
Best Alternatives to B3B-ZR-3.4(LF)(SN)
The JST B3B-ZR-3.4(LF)(SN) is a 3-pin, 1.5mm pitch, vertical through-hole header from the popular ZH series. When seeking alternatives, focus on matching the 1.5mm pitch, vertical orientation, and ZH series compatibility.
AI replacement insight
Package riskhigh
Orientation (vertical vs right-angle) and pitch are critical.
Electrical risklow
Standard 1A/50V ratings are common in this series.
Sourcing riskmedium
Multiple vendors make ZH-compatible connectors, but check stock.
Can it be replaced directly?
Direct replacement for B3B-ZR-3.4(LF)(SN) should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The closest alternative is B3B-ZR(LF)(SN) from JST, likely differing only in pin length. For a cross-vendor option, ZX-ZH1.5-3PLT from Megastar offers a strong parametric match.
Main risk
The main risk is mechanical incompatibility. Mismatches in mounting orientation (vertical vs. right-angle) or pin pitch will prevent a part from fitting on the PCB.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | B3B-ZR-3.4(LF)(SN) | B3B-ZR(LF)(SN) | ZX-ZH1.5-3PLT | HC-ZH1.5-3A | Compatibility / risk |
|---|---|---|---|---|---|
| Manufacturer | JST | JST | - | - | JST — Same manufacturer. |
| Part Number | B3B-ZR-3.4(LF)(SN) | B3B-ZR(LF)(SN) | - | - | B3B-ZR(LF)(SN) — Core part number matches, differs in suffix. |
| Package | Through Hole, Vertical | Through Hole, Vertical | Through Hole, Vertical | Through Hole, Vertical | Through Hole, Vertical — Form factor matches.; ZX-ZH1.5-3PLT: Form factor matches.; HC-ZH1.5-3A: Form factor matches. |
| Electricals | 50V / 1A | 50V / 1A | - | - | 50V / 1A — Key ratings match. |
| Temperature | -25°C to +85°C | -25°C to +85°C | -40°C to +105°C | Not specified | -25°C to +85°C / -40°C to +105°C / Not specified — Temperature range matches.; ZX-ZH1.5-3PLT: Wider operating temperature range.; HC-ZH1.5-3A: Operating temperature is a missing key spec. |
| Pin Count | 3 | - | 3 | 3 | 3 — Pin count matches.; HC-ZH1.5-3A: Pin count matches. |
| Pitch | 1.5mm | - | 1.5mm | 1.5mm | 1.5mm — Pitch matches.; HC-ZH1.5-3A: Pitch matches. |
| Voltage | 50V | - | 250V | 50V | 250V — Higher voltage rating provides more margin.; HC-ZH1.5-3A: Voltage rating matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for B3B-ZR-3.4(LF)(SN) are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.