★★★★★ 9/10 NPS Score 9/10 customers would recommend Z2 to a peer. Source: Z2 Customer Satisfaction Survey
Cross-reference any BJT, MOSFET, IGBT, or JFET by the parameters that decide fit — and every alternate arrives with lifecycle, compliance, and a part risk score attached.
Engineering teams at leading electronics OEMs run on Z2
I've found the comparison tool within Z2 to be very helpful. If I'm looking for a replacement part for an existing design, I can line up however many alternates I want to look at and look at the specs line by line and see where things are the same and see where things are different.
An incumbent transistor goes NRND or obsolete and the line is at risk. Finding a true drop-in means opening datasheet after datasheet and comparing Vce, Ic, hFE, and package by hand, with no lifecycle or compliance check on whatever you land on.
| Task | Without Z2 | With Z2 |
|---|---|---|
| Find an equivalent | Pull a dozen PDFs, compare specs line by line | Search hundreds of millions of parts for the closest match |
| Trust the match | Distributor cross misses gain, package, or thermal | A/B/C tiers flag every minor, moderate, and major difference |
| De-risk the alternate | Cross to a part that is itself near obsolescence | Lifecycle, compliance, and risk score on each candidate |
Cross-reference matches across every parameter that decides whether an alternate is a true drop-in, not just a catalog lookalike.
| Capability | All-in-one | Distributor cross-ref tools | Manual datasheet comparison |
|---|---|---|---|
| Searches hundreds of millions of parts | Yes | Partial | No |
| Validated form/fit/function match | Yes | No | Partial |
| A/B/C tiering by closeness | Yes | No | No |
| Flags minor / moderate / major differences | Yes | No | Partial |
| Lifecycle status & EOL forecast per alternate | Yes | No | No |
| Compliance status per alternate | Yes | Partial | No |
| Distributor pricing and availability | Yes | Yes | No |
| Multi-factor part risk score | Yes | No | No |
| Scales across a full BOM | Yes | Partial | No |
Closest Match
Z2 searches a normalized database of 1B+ components for the transistors closest to your incumbent, then sorts them into A, B, and C tiers by form, fit, and function. Line up as many candidates as you want and read the specs side by side: where Vce, Ic, hFE, and package line up, and exactly where they diverge. The comparison flags every difference as minor, moderate, or major, so you know whether you are looking at a drop-in or a redesign.
Lifecycle Built In
Around 150,000 components reach end-of-life every year, many with no PCN ever issued, so a distributor cross can hand you an alternate that is itself one notice from obsolescence. Every Z2 alternate carries a live lifecycle status and an EOL forecast backed by an algorithm with over 90% historical accuracy, proprietary to Z2 and validated against real outcomes. You pick the second source that holds, not the one that fails next.
One View
Each alternate rolls up its supplier profile, distributor pricing and availability, RoHS and REACH status, and a multi-factor part risk score into one view. Filter the results by country of origin, lifecycle projection, current availability, or compliance, and the shortlist narrows to transistors you can actually qualify and buy. The line-by-line spec check and the risk picture live in the same place, so the decision happens once.
Everything on this page is one tool: Part Risk Manager. It is where you cross-reference transistors by form, fit, and function and get lifecycle, compliance, pricing, and a part risk score on every alternate in the same view.
Get Started Free
Enter the manufacturer part number for the transistor you need to replace. Z2 pulls its full parametric profile from a database of 1B+ components.
Review A/B/C-tiered matches side by side, with every spec difference flagged and lifecycle, compliance, and risk scored on each one.
Filter by availability, country of origin, and compliance, then export the qualified candidates straight into your sourcing workflow.
BJTs (NPN and PNP), MOSFETs (N-channel and P-channel), IGBTs, and JFETs. Z2 matches on type and polarity along with package, voltage, current, power dissipation, gain or Rds(on), switching characteristics, and operating temperature range.
Distributor tools have broad catalogs but crosses are not validated for true form, fit, and function, and they bias toward parts the distributor stocks. Z2 ranks alternates in A/B/C tiers by how closely they match, then layers in lifecycle forecast, compliance, supplier risk, and availability that distributor crosses leave out.
Yes. Every candidate carries a live status of Active, NRND, EOL, or Obsolete plus an end-of-life forecast. The lifecycle algorithm has over 90% historical accuracy and is proprietary to Z2 and validated against real end-of-life outcomes, so you avoid crossing to a part that is itself near obsolescence.
Yes. Each alternate shows RoHS and REACH (SVHC) status, and you can filter the shortlist by compliance. Z2 maintains in-house expertise across 270+ regulations, so the compliance picture sits next to the parametric match rather than in a separate check.
Yes. The same cross-reference scales from a single transistor to an entire bill of materials, and you can filter results by country of origin, lifecycle projection, availability, and compliance to narrow to parts you can qualify and buy.
The same cross-reference and risk view spans every commodity in your BOM.
Real supply chain expertise, not just a support ticket queue.
Oliver DeThier
Director of Customer Success
Trusted by leading
OEMs worldwide.
Part Risk Manager
