A Bench Built for Relays and Capacitors
Applying a relay or a capacitor correctly is as important as choosing the right part. To support customers more effectively, BeiLuo has opened an FAE verification bench dedicated to Panasonic relays and capacitors. The bench lets our engineers measure relay contact and inrush behaviour and capacitor ripple and thermal behaviour before a customer commits to a design, turning advice into evidence rather than opinion. A relay that welds under inrush and a capacitor that runs too hot are the two failures that reach the field most often, so measuring them directly is one of the most useful things a distributor can do for a customer.
What We Measure
The bench is equipped with a programmable load, current and voltage probes, a thermal stage and an LCR meter. Engineers measure the relay contact current and voltage during a make and a break, they measure the inrush of a motor or a lamp load against the relay rating, and they measure the capacitor ripple current and the resulting case temperature. Measuring at the actual operating point matters, because a relay or a capacitor that looks comfortable on a datasheet can still fail in a real circuit.
Relay Contact and Inrush
Relay characterisation begins with the inrush. The engineers measure the peak current and the duration of a motor or lamp start, then compare it with the relay contact rating and the inrush figure. A relay that is under-rated welds or erodes its contacts, and the failure is invisible until the product is in the field, so measuring the inrush margin before the design is committed removes that risk. The bench also checks the coil drive, the pick-up voltage and the flyback behaviour.
From Selection to Validation
When a customer asks which part suits their circuit, our FAE team can now validate the recommendation on the bench. We compare a signal relay against a power relay, compare a standard capacitor against a low-impedance long-life part, and confirm that the chosen part meets the switching or the ripple requirement. The result is a design path backed by measured data, which reduces the risk of late-stage surprises and shortens the path from concept to production.
Capacitor Ripple and Thermal Validation
Thermal design is often where power supplies fail. The bench measures the capacitor case temperature under load, letting us verify the ripple-current estimate and the thermal path. For a compact supply, this validation is especially valuable, because a marginal capacitor runs hot and fails early, and the measurement lets us confirm the lifetime before the design is fixed. The bench also confirms the impedance at the switching frequency.
Supporting Customers Remotely
Not every customer can send hardware, so the bench also produces reference data that our team shares directly: recommended relay contact and coil ratings, expected inrush margins and capacitor ripple and lifetime estimates for common circuits. This shortens customer bring-up and lets design teams start from a known-good baseline, then fine-tune on their own bench. Over time, this reference data becomes a library that shortens the path for every new customer in the same power class.
A Lab That Answers Questions
The purpose of the bench is not to look impressive but to answer the questions customers actually ask: which relay, which contact rating, which capacitor, and how long will it last. A lab that answers those questions with measurement is what turns a component distributor into an engineering partner, and it is the standard BeiLuo intends to hold for Panasonic customers through 2026.
Bring-Up Support in Practice
In practice, the bench shortens bring-up in a predictable way. A customer sends the load, the coil supply and the rail voltage; the engineers propose a relay contact and a capacitor, measure the inrush margin and the case temperature, and return the evidence. The customer then reproduces the result on their own hardware, starting from a known-good baseline rather than a blank page. For teams without a dedicated lab, that support is often the difference between a design that ships on schedule and one that stalls in validation.
A Library That Grows
Every measurement also adds to a reference library of relay and capacitor behaviour for common circuits, so the next customer in the same power class starts from data rather than a guess. Over time the library covers the mainstream loads and rails, and it shortens every subsequent project. That is how a distributor turns a stock position into an engineering service, and it is the direction BeiLuo intends to keep through 2026 and beyond.